@ohos.multimedia.audio (Audio Management)

The Audio module provides basic audio management capabilities, including audio volume and audio device management, and audio data collection and rendering.

This module provides the following common audio-related functions:

• AudioManager: audio management.
• AudioRenderer: audio rendering, used to play Pulse Code Modulation (PCM) audio data.
• AudioCapturer: audio capture, used to record PCM audio data.
• TonePlayer: tone player, used to manage and play Dual Tone Multi Frequency (DTMF) tones, such as dial tones and ringback tones.

NOTE

The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version.

Modules to Import

import audio from '@ohos.multimedia.audio';

Constants

Name	Type	Readable	Writable	Description
LOCAL_NETWORK_ID9+	string	Yes	No	Network ID of the local device. This is a system API. System capability: SystemCapability.Multimedia.Audio.Device
DEFAULT_VOLUME_GROUP_ID9+	number	Yes	No	Default volume group ID. System capability: SystemCapability.Multimedia.Audio.Volume
DEFAULT_INTERRUPT_GROUP_ID9+	number	Yes	No	Default audio interruption group ID. System capability: SystemCapability.Multimedia.Audio.Interrupt

Example

import audio from '@ohos.multimedia.audio';

const localNetworkId = audio.LOCAL_NETWORK_ID;
const defaultVolumeGroupId = audio.DEFAULT_VOLUME_GROUP_ID;
const defaultInterruptGroupId = audio.DEFAULT_INTERRUPT_GROUP_ID;

audio.getAudioManager

getAudioManager(): AudioManager

Obtains an AudioManager instance.

System capability: SystemCapability.Multimedia.Audio.Core

Return value

Type	Description
AudioManager	AudioManager instance.

Example

import audio from '@ohos.multimedia.audio';
let audioManager = audio.getAudioManager();

audio.createAudioRenderer⁸⁺

createAudioRenderer(options: AudioRendererOptions, callback: AsyncCallback<AudioRenderer>): void

Creates an AudioRenderer instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
options	AudioRendererOptions	Yes	Renderer configurations.
callback	AsyncCallback<AudioRenderer>	Yes	Callback used to return the AudioRenderer instance.

Example

import fs from '@ohos.file.fs';
import audio from '@ohos.multimedia.audio';

let audioStreamInfo: audio.AudioStreamInfo = {
  samplingRate: audio.AudioSamplingRate.SAMPLE_RATE_44100,
  channels: audio.AudioChannel.CHANNEL_1,
  sampleFormat: audio.AudioSampleFormat.SAMPLE_FORMAT_S16LE,
  encodingType: audio.AudioEncodingType.ENCODING_TYPE_RAW
}

let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_VOICE_COMMUNICATION,
  rendererFlags: 0
}

let audioRendererOptions: audio.AudioRendererOptions = {
  streamInfo: audioStreamInfo,
  rendererInfo: audioRendererInfo
}

audio.createAudioRenderer(audioRendererOptions,(err, data) => {
  if (err) {
    console.error(`AudioRenderer Created: Error: ${err}`);
  } else {
    console.info('AudioRenderer Created: Success: SUCCESS');
    let audioRenderer = data;
  }
});

audio.createAudioRenderer⁸⁺

createAudioRenderer(options: AudioRendererOptions): Promise

Creates an AudioRenderer instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
options	AudioRendererOptions	Yes	Renderer configurations.

Return value

Type	Description
Promise<AudioRenderer>	Promise used to return the AudioRenderer instance.

Example

import fs from '@ohos.file.fs';
import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';

let audioStreamInfo: audio.AudioStreamInfo = {
  samplingRate: audio.AudioSamplingRate.SAMPLE_RATE_44100,
  channels: audio.AudioChannel.CHANNEL_1,
  sampleFormat: audio.AudioSampleFormat.SAMPLE_FORMAT_S16LE,
  encodingType: audio.AudioEncodingType.ENCODING_TYPE_RAW
}

let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_VOICE_COMMUNICATION,
  rendererFlags: 0
}

let audioRendererOptions: audio.AudioRendererOptions = {
  streamInfo: audioStreamInfo,
  rendererInfo: audioRendererInfo
}

let audioRenderer: audio.AudioRenderer;
audio.createAudioRenderer(audioRendererOptions).then((data) => {
  audioRenderer = data;
  console.info('AudioFrameworkRenderLog: AudioRenderer Created : Success : Stream Type: SUCCESS');
}).catch((err: BusinessError) => {
  console.error(`AudioFrameworkRenderLog: AudioRenderer Created : ERROR : ${err}`);
});

audio.createAudioCapturer⁸⁺

createAudioCapturer(options: AudioCapturerOptions, callback: AsyncCallback): void

Creates an AudioCapturer instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Required permissions: ohos.permission.MICROPHONE

Parameters

Name	Type	Mandatory	Description
options	AudioCapturerOptions	Yes	Capturer configurations.
callback	AsyncCallback<AudioCapturer>	Yes	Callback used to return the AudioCapturer instance.

Example

import audio from '@ohos.multimedia.audio';
let audioStreamInfo: audio.AudioStreamInfo = {
  samplingRate: audio.AudioSamplingRate.SAMPLE_RATE_44100,
  channels: audio.AudioChannel.CHANNEL_2,
  sampleFormat: audio.AudioSampleFormat.SAMPLE_FORMAT_S16LE,
  encodingType: audio.AudioEncodingType.ENCODING_TYPE_RAW
}

let audioCapturerInfo: audio.AudioCapturerInfo = {
  source: audio.SourceType.SOURCE_TYPE_MIC,
  capturerFlags: 0
}

let audioCapturerOptions: audio.AudioCapturerOptions = {
  streamInfo: audioStreamInfo,
  capturerInfo: audioCapturerInfo
}

audio.createAudioCapturer(audioCapturerOptions, (err, data) => {
  if (err) {
    console.error(`AudioCapturer Created : Error: ${err}`);
  } else {
    console.info('AudioCapturer Created : Success : SUCCESS');
    let audioCapturer = data;
  }
});

audio.createAudioCapturer⁸⁺

createAudioCapturer(options: AudioCapturerOptions): Promise

Creates an AudioCapturer instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Required permissions: ohos.permission.MICROPHONE

Parameters

Name	Type	Mandatory	Description
options	AudioCapturerOptions	Yes	Capturer configurations.

Return value

Type	Description
Promise<AudioCapturer>	Promise used to return the AudioCapturer instance.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';

let audioStreamInfo: audio.AudioStreamInfo = {
  samplingRate: audio.AudioSamplingRate.SAMPLE_RATE_44100,
  channels: audio.AudioChannel.CHANNEL_2,
  sampleFormat: audio.AudioSampleFormat.SAMPLE_FORMAT_S16LE,
  encodingType: audio.AudioEncodingType.ENCODING_TYPE_RAW
}

let audioCapturerInfo: audio.AudioCapturerInfo = {
  source: audio.SourceType.SOURCE_TYPE_MIC,
  capturerFlags: 0
}

let audioCapturerOptions:audio.AudioCapturerOptions = {
  streamInfo: audioStreamInfo,
  capturerInfo: audioCapturerInfo
}

let audioCapturer: audio.AudioCapturer;
audio.createAudioCapturer(audioCapturerOptions).then((data) => {
  audioCapturer = data;
  console.info('AudioCapturer Created : Success : Stream Type: SUCCESS');
}).catch((err: BusinessError) => {
  console.error(`AudioCapturer Created : ERROR : ${err}`);
});

audio.createTonePlayer⁹⁺

createTonePlayer(options: AudioRendererInfo, callback: AsyncCallback&lt;TonePlayer&gt;): void

Creates a TonePlayer instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Tone

System API: This is a system API.

Parameters

Name	Type	Mandatory	Description
options	AudioRendererInfo	Yes	Audio renderer information.
callback	AsyncCallback<TonePlayer>	Yes	Callback used to return the TonePlayer instance.

Example

import audio from '@ohos.multimedia.audio';

let audioRendererInfo: audio.AudioRendererInfo = {
  usage : audio.StreamUsage.STREAM_USAGE_DTMF,
  rendererFlags : 0
}
let tonePlayer: audio.TonePlayer;

audio.createTonePlayer(audioRendererInfo, (err, data) => {
  console.info(`callback call createTonePlayer: audioRendererInfo: ${audioRendererInfo}`);
  if (err) {
    console.error(`callback call createTonePlayer return error: ${err.message}`);
  } else {
    console.info(`callback call createTonePlayer return data: ${data}`);
    tonePlayer = data;
  }
});

audio.createTonePlayer⁹⁺

createTonePlayer(options: AudioRendererInfo): Promise&lt;TonePlayer&gt;

Creates a TonePlayer instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Tone

System API: This is a system API.

Parameters

Name	Type	Mandatory	Description
options	AudioRendererInfo	Yes	Audio renderer information.

Return value

Type	Description
Promise<TonePlayer>	Promise used to return the TonePlayer instance.

Example

import audio from '@ohos.multimedia.audio';
let tonePlayer: audio.TonePlayer;
async function createTonePlayerBefore(){
  let audioRendererInfo: audio.AudioRendererInfo = {
    usage : audio.StreamUsage.STREAM_USAGE_DTMF,
    rendererFlags : 0
  }
  tonePlayer = await audio.createTonePlayer(audioRendererInfo);
}

AudioVolumeType

Enumerates the audio stream types.

System capability: SystemCapability.Multimedia.Audio.Volume

Name	Value	Description
VOICE_CALL8+	0	Audio stream for voice calls.
RINGTONE	2	Audio stream for ringtones.
MEDIA	3	Audio stream for media purpose.
ALARM10+	4	Audio stream for alarming.
ACCESSIBILITY10+	5	Audio stream for accessibility.
VOICE_ASSISTANT8+	9	Audio stream for voice assistant.
ULTRASONIC10+	10	Audio stream for ultrasonic. This is a system API.
ALL9+	100	All public audio streams. This is a system API.

InterruptRequestResultType⁹⁺

Enumerates the result types of audio interruption requests.

System capability: SystemCapability.Multimedia.Audio.Interrupt

System API: This is a system API.

Name	Value	Description
INTERRUPT_REQUEST_GRANT	0	The audio interruption request is accepted.
INTERRUPT_REQUEST_REJECT	1	The audio interruption request is denied. There may be a stream with a higher priority.

InterruptMode⁹⁺

Enumerates the audio interruption modes.

System capability: SystemCapability.Multimedia.Audio.Interrupt

Name	Value	Description
SHARE_MODE	0	Shared mode.
INDEPENDENT_MODE	1	Independent mode.

DeviceFlag

Enumerates the audio device flags.

System capability: SystemCapability.Multimedia.Audio.Device

Name	Value	Description
NONE_DEVICES_FLAG9+	0	No device. This is a system API.
OUTPUT_DEVICES_FLAG	1	Output device.
INPUT_DEVICES_FLAG	2	Input device.
ALL_DEVICES_FLAG	3	All devices.
DISTRIBUTED_OUTPUT_DEVICES_FLAG9+	4	Distributed output device. This is a system API.
DISTRIBUTED_INPUT_DEVICES_FLAG9+	8	Distributed input device. This is a system API.
ALL_DISTRIBUTED_DEVICES_FLAG9+	12	Distributed input and output device. This is a system API.

DeviceRole

Enumerates the audio device roles.

System capability: SystemCapability.Multimedia.Audio.Device

Name	Value	Description
INPUT_DEVICE	1	Input role.
OUTPUT_DEVICE	2	Output role.

DeviceType

Enumerates the audio device types.

System capability: SystemCapability.Multimedia.Audio.Device

Name	Value	Description
INVALID	0	Invalid device.
EARPIECE	1	Earpiece.
SPEAKER	2	Speaker.
WIRED_HEADSET	3	Wired headset with a microphone.
WIRED_HEADPHONES	4	Wired headset without microphone.
BLUETOOTH_SCO	7	Bluetooth device using Synchronous Connection Oriented (SCO) links.
BLUETOOTH_A2DP	8	Bluetooth device using Advanced Audio Distribution Profile (A2DP) links.
MIC	15	Microphone.
USB_HEADSET	22	USB Type-C headset.
DEFAULT9+	1000	Default device type.

CommunicationDeviceType⁹⁺

Enumerates the device types used for communication.

System capability: SystemCapability.Multimedia.Audio.Communication

Name	Value	Description
SPEAKER	2	Speaker.

AudioRingMode

Enumerates the ringer modes.

System capability: SystemCapability.Multimedia.Audio.Communication

Name	Value	Description
RINGER_MODE_SILENT	0	Silent mode.
RINGER_MODE_VIBRATE	1	Vibration mode.
RINGER_MODE_NORMAL	2	Normal mode.

AudioSampleFormat⁸⁺

Enumerates the audio sample formats.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Value	Description
SAMPLE_FORMAT_INVALID	-1	Invalid format.
SAMPLE_FORMAT_U8	0	Unsigned 8-bit integer.
SAMPLE_FORMAT_S16LE	1	Signed 16-bit integer, little endian.
SAMPLE_FORMAT_S24LE	2	Signed 24-bit integer, little endian. Due to system restrictions, only some devices support this sampling format.
SAMPLE_FORMAT_S32LE	3	Signed 32-bit integer, little endian. Due to system restrictions, only some devices support this sampling format.
SAMPLE_FORMAT_F32LE9+	4	Signed 32-bit floating point number, little endian. Due to system restrictions, only some devices support this sampling format.

AudioErrors⁹⁺

Enumerates the audio error codes.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Value	Description
ERROR_INVALID_PARAM	6800101	Invalid parameter.
ERROR_NO_MEMORY	6800102	Memory allocation failure.
ERROR_ILLEGAL_STATE	6800103	Unsupported state.
ERROR_UNSUPPORTED	6800104	Unsupported parameter value.
ERROR_TIMEOUT	6800105	Processing timeout.
ERROR_STREAM_LIMIT	6800201	Too many audio streams.
ERROR_SYSTEM	6800301	System error.

AudioChannel⁸⁺

Enumerates the audio channels.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Value	Description
CHANNEL_1	0x1 << 0	Channel 1.
CHANNEL_2	0x1 << 1	Channel 2.

AudioSamplingRate⁸⁺

Enumerates the audio sampling rates. The sampling rates supported vary according to the device in use.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Value	Description
SAMPLE_RATE_8000	8000	The sampling rate is 8000.
SAMPLE_RATE_11025	11025	The sampling rate is 11025.
SAMPLE_RATE_12000	12000	The sampling rate is 12000.
SAMPLE_RATE_16000	16000	The sampling rate is 16000.
SAMPLE_RATE_22050	22050	The sampling rate is 22050.
SAMPLE_RATE_24000	24000	The sampling rate is 24000.
SAMPLE_RATE_32000	32000	The sampling rate is 32000.
SAMPLE_RATE_44100	44100	The sampling rate is 44100.
SAMPLE_RATE_48000	48000	The sampling rate is 48000.
SAMPLE_RATE_64000	64000	The sampling rate is 64000.
SAMPLE_RATE_96000	96000	The sampling rate is 96000.

AudioEncodingType⁸⁺

Enumerates the audio encoding types.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Value	Description
ENCODING_TYPE_INVALID	-1	Invalid.
ENCODING_TYPE_RAW	0	PCM encoding.

ContentType

Enumerates the audio content types.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Value	Description
CONTENT_TYPE_UNKNOWN	0	Unknown content.
CONTENT_TYPE_SPEECH	1	Speech.
CONTENT_TYPE_MUSIC	2	Music.
CONTENT_TYPE_MOVIE	3	Movie.
CONTENT_TYPE_SONIFICATION	4	Notification tone.
CONTENT_TYPE_RINGTONE8+	5	Ringtone.

StreamUsage

Enumerates the audio stream usage.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Value	Description
STREAM_USAGE_UNKNOWN	0	Unknown usage.
STREAM_USAGE_MEDIA	1	Media.
STREAM_USAGE_MUSIC10+	1	Music.
STREAM_USAGE_VOICE_COMMUNICATION	2	Voice communication.
STREAM_USAGE_VOICE_ASSISTANT9+	3	Voice assistant.
STREAM_USAGE_ALARM10+	4	Alarming.
STREAM_USAGE_VOICE_MESSAGE10+	5	Voice message.
STREAM_USAGE_NOTIFICATION_RINGTONE	6	Notification tone.
STREAM_USAGE_RINGTONE10+	6	Ringtone.
STREAM_USAGE_NOTIFICATION10+	7	Notification.
STREAM_USAGE_ACCESSIBILITY10+	8	Accessibility.
STREAM_USAGE_SYSTEM10+	9	System tone (such as screen lock sound effect or key tone). This is a system API.
STREAM_USAGE_MOVIE10+	10	Movie or video.
STREAM_USAGE_GAME10+	11	Game sound effect.
STREAM_USAGE_AUDIOBOOK10+	12	Audiobook.
STREAM_USAGE_NAVIGATION10+	13	Navigation.
STREAM_USAGE_DTMF10+	14	Dial tone. This is a system API.
STREAM_USAGE_ENFORCED_TONE10+	15	Forcible tone (such as camera shutter sound effect). This is a system API.
STREAM_USAGE_ULTRASONIC10+	16	Ultrasonic. This is a system API.

InterruptRequestType⁹⁺

Enumerates the audio interruption request types.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Interrupt

Name	Value	Description
INTERRUPT_REQUEST_TYPE_DEFAULT	0	Default type, which can be used to interrupt audio requests.

AudioState⁸⁺

Enumerates the audio states.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Value	Description
STATE_INVALID	-1	Invalid state.
STATE_NEW	0	Creating instance state.
STATE_PREPARED	1	Prepared.
STATE_RUNNING	2	Running.
STATE_STOPPED	3	Stopped.
STATE_RELEASED	4	Released.
STATE_PAUSED	5	Paused.

AudioEffectMode¹⁰⁺

Enumerates the audio effect modes.

System capability: SystemCapability.Multimedia.Audio.Renderer

Name	Value	Description
EFFECT_NONE	0	The audio effect is disabled.
EFFECT_DEFAULT	1	The default audio effect is used.

AudioRendererRate⁸⁺

Enumerates the audio renderer rates.

System capability: SystemCapability.Multimedia.Audio.Renderer

Name	Value	Description
RENDER_RATE_NORMAL	0	Normal rate.
RENDER_RATE_DOUBLE	1	Double rate.
RENDER_RATE_HALF	2	Half rate.

InterruptType

Enumerates the audio interruption types.

System capability: SystemCapability.Multimedia.Audio.Renderer

Name	Value	Description
INTERRUPT_TYPE_BEGIN	1	Audio interruption started.
INTERRUPT_TYPE_END	2	Audio interruption ended.

InterruptForceType⁹⁺

Enumerates the types of force that causes audio interruption.

System capability: SystemCapability.Multimedia.Audio.Renderer

Name	Value	Description
INTERRUPT_FORCE	0	Forced action taken by the system.
INTERRUPT_SHARE	1	The application can choose to take action or ignore.

InterruptHint

Enumerates the hints provided along with audio interruption.

System capability: SystemCapability.Multimedia.Audio.Renderer

Name	Value	Description
INTERRUPT_HINT_NONE8+	0	None.
INTERRUPT_HINT_RESUME	1	Resume the playback.
INTERRUPT_HINT_PAUSE	2	Paused/Pause the playback.
INTERRUPT_HINT_STOP	3	Stopped/Stop the playback.
INTERRUPT_HINT_DUCK	4	Ducked the playback. (In ducking, the audio volume is reduced, but not silenced.)
INTERRUPT_HINT_UNDUCK8+	5	Unducked the playback.

AudioStreamInfo⁸⁺

Describes audio stream information.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Type	Mandatory	Description
samplingRate	AudioSamplingRate	Yes	Audio sampling rate.
channels	AudioChannel	Yes	Number of audio channels.
sampleFormat	AudioSampleFormat	Yes	Audio sample format.
encodingType	AudioEncodingType	Yes	Audio encoding type.

AudioRendererInfo⁸⁺

Describes audio renderer information.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Type	Mandatory	Description
content	ContentType	No	Audio content type. This parameter is mandatory in API versions 8 and 9 and optional since API version 10.
usage	StreamUsage	Yes	Audio stream usage.
rendererFlags	number	Yes	Audio renderer flags. The value 0 means a common audio renderer, and 1 means a low-latency audio renderer. Currently, the JS APIs do not support the low-latency audio renderer.

InterruptResult⁹⁺

Describes the audio interruption result.

System capability: SystemCapability.Multimedia.Audio.Interrupt

System API: This is a system API.

Name	Type	Mandatory	Description
requestResult	InterruptRequestResultType	Yes	Audio interruption request type.
interruptNode	number	Yes	Node to interrupt.

AudioRendererOptions⁸⁺

Describes audio renderer configurations.

Name	Type	Mandatory	Description
streamInfo	AudioStreamInfo	Yes	Audio stream information. System capability: SystemCapability.Multimedia.Audio.Renderer
rendererInfo	AudioRendererInfo	Yes	Audio renderer information. System capability: SystemCapability.Multimedia.Audio.Renderer
privacyType10+	AudioPrivacyType	No	Whether the audio stream can be recorded by other applications. The default value is 0. System capability: SystemCapability.Multimedia.Audio.PlaybackCapture

AudioPrivacyType¹⁰⁺

Enumerates whether an audio stream can be recorded by other applications.

System capability: SystemCapability.Multimedia.Audio.PlaybackCapture

Name	Value	Description
PRIVACY_TYPE_PUBLIC	0	The audio stream can be recorded by other applications.
PRIVACY_TYPE_PRIVATE	1	The audio stream cannot be recorded by other applications.

InterruptEvent⁹⁺

Describes the interruption event received by the application when playback is interrupted.

System capability: SystemCapability.Multimedia.Audio.Renderer

Name	Type	Mandatory	Description
eventType	InterruptType	Yes	Whether the interruption has started or ended.
forceType	InterruptForceType	Yes	Whether the interruption is taken by the system or to be taken by the application.
hintType	InterruptHint	Yes	Hint provided along the interruption.

VolumeEvent⁹⁺

Describes the event received by the application when the volume is changed.

System capability: SystemCapability.Multimedia.Audio.Volume

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
volume	number	Yes	Volume to set. The value range can be obtained by calling getMinVolume and getMaxVolume.
updateUi	boolean	Yes	Whether to show the volume change in UI.
volumeGroupId	number	Yes	Volume group ID. It can be used as an input parameter of getGroupManager. This is a system API.
networkId	string	Yes	Network ID. This is a system API.

MicStateChangeEvent⁹⁺

Describes the event received by the application when the microphone mute status changes.

System capability: SystemCapability.Multimedia.Audio.Device

Name	Type	Mandatory	Description
mute	boolean	Yes	Mute status of the microphone. The value true means that the microphone is muted, and false means the opposite.

ConnectType⁹⁺

Enumerates the types of connected devices.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Name	Value	Description
CONNECT_TYPE_LOCAL	1	Local device.
CONNECT_TYPE_DISTRIBUTED	2	Distributed device.

VolumeGroupInfos⁹⁺

Describes the volume group information. The value is an array of VolumeGroupInfo and is read-only.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

VolumeGroupInfo⁹⁺

Describes the volume group information.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Name	Type	Readable	Writable	Description
networkId9+	string	Yes	No	Network ID of the device.
groupId9+	number	Yes	No	Group ID of the device.
mappingId9+	number	Yes	No	Group mapping ID.
groupName9+	string	Yes	No	Group name.
type9+	ConnectType	Yes	No	Type of the connected device.

DeviceChangeAction

Describes the device connection status and device information.

System capability: SystemCapability.Multimedia.Audio.Device

Name	Type	Mandatory	Description
type	DeviceChangeType	Yes	Device connection status.
deviceDescriptors	AudioDeviceDescriptors	Yes	Device information.

ChannelBlendMode¹¹⁺

Enumerates the audio channel blending modes.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Value	Description
MODE_DEFAULT11+	0	The audio channels are not blended.
MODE_BLEND_LR11+	1	The left and right audio channels are blended.
MODE_ALL_LEFT11+	2	The left channel is replicated into the right channel.
MODE_ALL_RIGHT11+	3	The right channel is replicated into the left channel.

DeviceChangeType

Enumerates the device connection statuses.

System capability: SystemCapability.Multimedia.Audio.Device

Name	Value	Description
CONNECT	0	Connected.
DISCONNECT	1	Disconnected.

AudioCapturerOptions⁸⁺

Describes audio capturer configurations.

Name	Type	Mandatory	Description
streamInfo	AudioStreamInfo	Yes	Audio stream information. System capability: SystemCapability.Multimedia.Audio.Capturer
capturerInfo	AudioCapturerInfo	Yes	Audio capturer information. System capability: SystemCapability.Multimedia.Audio.Capturer
playbackCaptureConfig10+	AudioPlaybackCaptureConfig	No	Configuration of internal audio recording. System capability: SystemCapability.Multimedia.Audio.PlaybackCapture

AudioCapturerInfo⁸⁺

Describes audio capturer information.

System capability: SystemCapability.Multimedia.Audio.Core

Name	Type	Mandatory	Description
source	SourceType	Yes	Audio source type.
capturerFlags	number	Yes	Audio capturer flags.

SourceType⁸⁺

Enumerates the audio source types.

Name	Value	Description
SOURCE_TYPE_INVALID	-1	Invalid audio source. System capability: SystemCapability.Multimedia.Audio.Core
SOURCE_TYPE_MIC	0	Mic source. System capability: SystemCapability.Multimedia.Audio.Core
SOURCE_TYPE_VOICE_RECOGNITION9+	1	Voice recognition source. System capability: SystemCapability.Multimedia.Audio.Core
SOURCE_TYPE_PLAYBACK_CAPTURE10+	2	Internal audio recording source. System capability: SystemCapability.Multimedia.Audio.PlaybackCapture
SOURCE_TYPE_WAKEUP 10+	3	Audio recording source in voice wake-up scenarios. System capability: SystemCapability.Multimedia.Audio.Core Required permissions: ohos.permission.MANAGE_INTELLIGENT_VOICE This is a system API.
SOURCE_TYPE_VOICE_COMMUNICATION	7	Voice communication source. System capability: SystemCapability.Multimedia.Audio.Core

AudioPlaybackCaptureConfig¹⁰⁺

Defines the configuration of internal audio recording.

System capability: SystemCapability.Multimedia.Audio.PlaybackCapture

Name	Type	Mandatory	Description
filterOptions	CaptureFilterOptions	Yes	Options for filtering the played audio streams to be recorded.

CaptureFilterOptions¹⁰⁺

Defines the options for filtering the played audio streams to be recorded.

Required permissions: ohos.permission.CAPTURE_VOICE_DOWNLINK_AUDIO

This permission is required when an application wants to record a played audio stream for which StreamUsage is set to SOURCE_TYPE_VOICE_COMMUNICATION.

System capability: SystemCapability.Multimedia.Audio.PlaybackCapture

Name	Type	Mandatory	Description
usages	Array<StreamUsage>	Yes	StreamUsage of the audio stream to be recorded. You can specify zero or more stream usages. If the array is empty, the audio stream for which StreamUsage is STREAM_USAGE_MEDIA is recorded by default.

AudioScene⁸⁺

Enumerates the audio scenes.

System capability: SystemCapability.Multimedia.Audio.Communication

Name	Value	Description
AUDIO_SCENE_DEFAULT	0	Default audio scene.
AUDIO_SCENE_RINGING	1	Ringing audio scene. This is a system API.
AUDIO_SCENE_PHONE_CALL	2	Phone call audio scene. This is a system API.
AUDIO_SCENE_VOICE_CHAT	3	Voice chat audio scene.

VolumeAdjustType¹⁰⁺

Enumerates the volume adjustment types.

System capability: SystemCapability.Multimedia.Audio.Volume

Name	Value	Description
VOLUME_UP	0	Adjusts the volume upwards. This is a system API.
VOLUME_DOWN	1	Adjusts the volume downwards. This is a system API.

AudioManager

Implements audio volume and audio device management. Before calling any API in AudioManager, you must use getAudioManager to create an AudioManager instance.

setAudioParameter

setAudioParameter(key: string, value: string, callback: AsyncCallback&lt;void&gt;): void

Sets an audio parameter. This API uses an asynchronous callback to return the result.

This API is used to extend the audio configuration based on the hardware capability. The supported audio parameters vary according to the device and can be obtained from the device manual. The example below is for reference only.

Required permissions: ohos.permission.MODIFY_AUDIO_SETTINGS

System capability: SystemCapability.Multimedia.Audio.Core

Parameters

Name	Type	Mandatory	Description
key	string	Yes	Key of the audio parameter to set.
value	string	Yes	Value of the audio parameter to set.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioManager.setAudioParameter('key_example', 'value_example', (err: BusinessError) => {
  if (err) {
    console.error(`Failed to set the audio parameter. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate a successful setting of the audio parameter.');
});

setAudioParameter

setAudioParameter(key: string, value: string): Promise&lt;void&gt;

Sets an audio parameter. This API uses a promise to return the result.

This API is used to extend the audio configuration based on the hardware capability. The supported audio parameters vary according to the device and can be obtained from the device manual. The example below is for reference only.

Required permissions: ohos.permission.MODIFY_AUDIO_SETTINGS

System capability: SystemCapability.Multimedia.Audio.Core

Parameters

Name	Type	Mandatory	Description
key	string	Yes	Key of the audio parameter to set.
value	string	Yes	Value of the audio parameter to set.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

audioManager.setAudioParameter('key_example', 'value_example').then(() => {
  console.info('Promise returned to indicate a successful setting of the audio parameter.');
});

getAudioParameter

getAudioParameter(key: string, callback: AsyncCallback&lt;string&gt;): void

Obtains the value of an audio parameter. This API uses an asynchronous callback to return the result.

This API is used to extend the audio configuration based on the hardware capability. The supported audio parameters vary according to the device and can be obtained from the device manual. The example below is for reference only.

System capability: SystemCapability.Multimedia.Audio.Core

Parameters

Name	Type	Mandatory	Description
key	string	Yes	Key of the audio parameter whose value is to be obtained.
callback	AsyncCallback<string>	Yes	Callback used to return the value of the audio parameter.

Example

import { BusinessError } from '@ohos.base';
audioManager.getAudioParameter('key_example', (err: BusinessError, value: string) => {
  if (err) {
    console.error(`Failed to obtain the value of the audio parameter. ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the value of the audio parameter is obtained ${value}.`);
});

getAudioParameter

getAudioParameter(key: string): Promise&lt;string&gt;

Obtains the value of an audio parameter. This API uses a promise to return the result.

This API is used to extend the audio configuration based on the hardware capability. The supported audio parameters vary according to the device and can be obtained from the device manual. The example below is for reference only.

System capability: SystemCapability.Multimedia.Audio.Core

Parameters

Name	Type	Mandatory	Description
key	string	Yes	Key of the audio parameter whose value is to be obtained.

Return value

Type	Description
Promise<string>	Promise used to return the value of the audio parameter.

Example

audioManager.getAudioParameter('key_example').then((value: string) => {
  console.info(`Promise returned to indicate that the value of the audio parameter is obtained ${value}.`);
});

setAudioScene⁸⁺

setAudioScene(scene: AudioScene, callback: AsyncCallback): void

Sets an audio scene. This API uses an asynchronous callback to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
scene	AudioScene	Yes	Audio scene to set.
callback	AsyncCallback	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioManager.setAudioScene(audio.AudioScene.AUDIO_SCENE_PHONE_CALL, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to set the audio scene mode.​ ${err}`);
    return;
  }
  console.info('Callback invoked to indicate a successful setting of the audio scene mode.');
});

setAudioScene⁸⁺

setAudioScene(scene: AudioScene): Promise

Sets an audio scene. This API uses a promise to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
scene	AudioScene	Yes	Audio scene to set.

Return value

Type	Description
Promise	Promise used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioManager.setAudioScene(audio.AudioScene.AUDIO_SCENE_PHONE_CALL).then(() => {
  console.info('Promise returned to indicate a successful setting of the audio scene mode.');
}).catch ((err: BusinessError) => {
  console.error(`Failed to set the audio scene mode ${err}`);
});

getAudioScene⁸⁺

getAudioScene(callback: AsyncCallback): void

Obtains the audio scene. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<AudioScene>	Yes	Callback used to return the audio scene.

Example

import { BusinessError } from '@ohos.base';
audioManager.getAudioScene((err: BusinessError, value: audio.AudioScene) => {
  if (err) {
    console.error(`Failed to obtain the audio scene mode.​ ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the audio scene mode is obtained ${value}.`);
});

getAudioScene⁸⁺

getAudioScene(): Promise

Obtains the audio scene. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Communication

Return value

Type	Description
Promise<AudioScene>	Promise used to return the audio scene.

Example

import { BusinessError } from '@ohos.base';
audioManager.getAudioScene().then((value: audio.AudioScene) => {
  console.info(`Promise returned to indicate that the audio scene mode is obtained ${value}.`);
}).catch ((err: BusinessError) => {
  console.error(`Failed to obtain the audio scene mode ${err}`);
});

getAudioSceneSync¹⁰⁺

getAudioSceneSync(): AudioScene

Obtains the audio scene. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Communication

Return value

Type	Description
AudioScene	Audio scene.

Example

import { BusinessError } from '@ohos.base';

try {
  let value: audio.AudioScene = audioManager.getAudioSceneSync();
  console.info(`indicate that the audio scene mode is obtained ${value}.`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Failed to obtain the audio scene mode ${error}`);
}

getVolumeManager⁹⁺

getVolumeManager(): AudioVolumeManager

Obtains an AudioVolumeManager instance.

System capability: SystemCapability.Multimedia.Audio.Volume

Example

import audio from '@ohos.multimedia.audio';
let audioVolumeManager: audio.AudioVolumeManager = audioManager.getVolumeManager();

getStreamManager⁹⁺

getStreamManager(): AudioStreamManager

Obtains an AudioStreamManager instance.

System capability: SystemCapability.Multimedia.Audio.Core

Example

import audio from '@ohos.multimedia.audio';
let audioStreamManager: audio.AudioStreamManager = audioManager.getStreamManager();

getRoutingManager⁹⁺

getRoutingManager(): AudioRoutingManager

Obtains an AudioRoutingManager instance.

System capability: SystemCapability.Multimedia.Audio.Device

Example

import audio from '@ohos.multimedia.audio';
let audioRoutingManager: audio.AudioRoutingManager = audioManager.getRoutingManager();

setVolume^(deprecated)

setVolume(volumeType: AudioVolumeType, volume: number, callback: AsyncCallback&lt;void&gt;): void

Sets the volume for a stream. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use setVolume in AudioVolumeGroupManager. The substitute API is available only for system applications.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer when volumeType is set to AudioVolumeType.RINGTONE.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
volume	number	Yes	Volume to set. The value range can be obtained by calling getMinVolume and getMaxVolume.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioManager.setVolume(audio.AudioVolumeType.MEDIA, 10, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to set the volume. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate a successful volume setting.');
});

setVolume^(deprecated)

setVolume(volumeType: AudioVolumeType, volume: number): Promise&lt;void&gt;

Sets the volume for a stream. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use setVolume in AudioVolumeGroupManager. The substitute API is available only for system applications.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer when volumeType is set to AudioVolumeType.RINGTONE.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
volume	number	Yes	Volume to set. The value range can be obtained by calling getMinVolume and getMaxVolume.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

audioManager.setVolume(audio.AudioVolumeType.MEDIA, 10).then(() => {
  console.info('Promise returned to indicate a successful volume setting.');
});

getVolume^(deprecated)

getVolume(volumeType: AudioVolumeType, callback: AsyncCallback&lt;number&gt;): void

Obtains the volume of a stream. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use getVolume in AudioVolumeGroupManager.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
callback	AsyncCallback<number>	Yes	Callback used to return the volume.

Example

import { BusinessError } from '@ohos.base';
audioManager.getVolume(audio.AudioVolumeType.MEDIA, (err: BusinessError, value: number) => {
  if (err) {
    console.error(`Failed to obtain the volume. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the volume is obtained.');
});

getVolume^(deprecated)

getVolume(volumeType: AudioVolumeType): Promise&lt;number&gt;

Obtains the volume of a stream. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use getVolume in AudioVolumeGroupManager.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
Promise<number>	Promise used to return the volume.

Example

audioManager.getVolume(audio.AudioVolumeType.MEDIA).then((value: number) => {
  console.info(`Promise returned to indicate that the volume is obtained ${value} .`);
});

getMinVolume^(deprecated)

getMinVolume(volumeType: AudioVolumeType, callback: AsyncCallback&lt;number&gt;): void

Obtains the minimum volume allowed for a stream. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use getMinVolume in AudioVolumeGroupManager.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
callback	AsyncCallback<number>	Yes	Callback used to return the minimum volume.

Example

import { BusinessError } from '@ohos.base';
audioManager.getMinVolume(audio.AudioVolumeType.MEDIA, (err: BusinessError, value: number) => {
  if (err) {
    console.error(`Failed to obtain the minimum volume. ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the minimum volume is obtained. ${value}`);
});

getMinVolume^(deprecated)

getMinVolume(volumeType: AudioVolumeType): Promise&lt;number&gt;

Obtains the minimum volume allowed for a stream. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use getMinVolume in AudioVolumeGroupManager.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
Promise<number>	Promise used to return the minimum volume.

Example

audioManager.getMinVolume(audio.AudioVolumeType.MEDIA).then((value: number) => {
  console.info(`Promised returned to indicate that the minimum volume is obtained. ${value}`);
});

getMaxVolume^(deprecated)

getMaxVolume(volumeType: AudioVolumeType, callback: AsyncCallback&lt;number&gt;): void

Obtains the maximum volume allowed for a stream. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use getMaxVolume in AudioVolumeGroupManager.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
callback	AsyncCallback<number>	Yes	Callback used to return the maximum volume.

Example

import { BusinessError } from '@ohos.base';
audioManager.getMaxVolume(audio.AudioVolumeType.MEDIA, (err: BusinessError, value: number) => {
  if (err) {
    console.error(`Failed to obtain the maximum volume. ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the maximum volume is obtained. ${value}`);
});

getMaxVolume^(deprecated)

getMaxVolume(volumeType: AudioVolumeType): Promise&lt;number&gt;

Obtains the maximum volume allowed for a stream. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use getMaxVolume in AudioVolumeGroupManager.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
Promise<number>	Promise used to return the maximum volume.

Example

audioManager.getMaxVolume(audio.AudioVolumeType.MEDIA).then((data: number) => {
  console.info('Promised returned to indicate that the maximum volume is obtained.');
});

mute^(deprecated)

mute(volumeType: AudioVolumeType, mute: boolean, callback: AsyncCallback&lt;void&gt;): void

Mutes or unmutes a stream. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use mute in AudioVolumeGroupManager. The substitute API is available only for system applications.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
mute	boolean	Yes	Mute status to set. The value true means to mute the stream, and false means the opposite.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioManager.mute(audio.AudioVolumeType.MEDIA, true, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to mute the stream. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the stream is muted.');
});

mute^(deprecated)

mute(volumeType: AudioVolumeType, mute: boolean): Promise&lt;void&gt;

Mutes or unmutes a stream. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use mute in AudioVolumeGroupManager. The substitute API is available only for system applications.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
mute	boolean	Yes	Mute status to set. The value true means to mute the stream, and false means the opposite.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

audioManager.mute(audio.AudioVolumeType.MEDIA, true).then(() => {
  console.info('Promise returned to indicate that the stream is muted.');
});

isMute^(deprecated)

isMute(volumeType: AudioVolumeType, callback: AsyncCallback&lt;boolean&gt;): void

Checks whether a stream is muted. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use isMute in AudioVolumeGroupManager.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
callback	AsyncCallback<boolean>	Yes	Callback used to return the mute status of the stream. The value true means that the stream is muted, and false means the opposite.

Example

import { BusinessError } from '@ohos.base';
audioManager.isMute(audio.AudioVolumeType.MEDIA, (err: BusinessError, value: boolean) => {
  if (err) {
    console.error(`Failed to obtain the mute status. ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the mute status of the stream is obtained. ${value}`);
});

isMute^(deprecated)

isMute(volumeType: AudioVolumeType): Promise&lt;boolean&gt;

Checks whether a stream is muted. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use isMute in AudioVolumeGroupManager.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
Promise<boolean>	Promise used to return the mute status of the stream. The value true means that the stream is muted, and false means the opposite.

Example

audioManager.isMute(audio.AudioVolumeType.MEDIA).then((value: boolean) => {
  console.info(`Promise returned to indicate that the mute status of the stream is obtained ${value}.`);
});

isActive^(deprecated)

isActive(volumeType: AudioVolumeType, callback: AsyncCallback&lt;boolean&gt;): void

Checks whether a stream is active. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use isActive in AudioStreamManager.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
callback	AsyncCallback<boolean>	Yes	Callback used to return the active status of the stream. The value true means that the stream is active, and false means the opposite.

Example

import { BusinessError } from '@ohos.base';
audioManager.isActive(audio.AudioVolumeType.MEDIA, (err: BusinessError, value: boolean) => {
  if (err) {
    console.error(`Failed to obtain the active status of the stream. ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the active status of the stream is obtained ${value}.`);
});

isActive^(deprecated)

isActive(volumeType: AudioVolumeType): Promise&lt;boolean&gt;

Checks whether a stream is active. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use isActive in AudioStreamManager.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
Promise<boolean>	Promise used to return the active status of the stream. The value true means that the stream is active, and false means the opposite.

Example

audioManager.isActive(audio.AudioVolumeType.MEDIA).then((value: boolean) => {
  console.info(`Promise returned to indicate that the active status of the stream is obtained ${value}.`);
});

setRingerMode^(deprecated)

setRingerMode(mode: AudioRingMode, callback: AsyncCallback&lt;void&gt;): void

Sets the ringer mode. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use setRingerMode in AudioVolumeGroupManager. The substitute API is available only for system applications.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
mode	AudioRingMode	Yes	Ringer mode.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioManager.setRingerMode(audio.AudioRingMode.RINGER_MODE_NORMAL, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to set the ringer mode.​ ${err}`);
    return;
  }
  console.info('Callback invoked to indicate a successful setting of the ringer mode.');
});

setRingerMode^(deprecated)

setRingerMode(mode: AudioRingMode): Promise&lt;void&gt;

Sets the ringer mode. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use setRingerMode in AudioVolumeGroupManager. The substitute API is available only for system applications.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
mode	AudioRingMode	Yes	Ringer mode.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

audioManager.setRingerMode(audio.AudioRingMode.RINGER_MODE_NORMAL).then(() => {
  console.info('Promise returned to indicate a successful setting of the ringer mode.');
});

getRingerMode^(deprecated)

getRingerMode(callback: AsyncCallback&lt;AudioRingMode&gt;): void

Obtains the ringer mode. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use getRingerMode in AudioVolumeGroupManager.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<AudioRingMode>	Yes	Callback used to return the ringer mode.

Example

import { BusinessError } from '@ohos.base';
audioManager.getRingerMode((err: BusinessError, value: audio.AudioRingMode) => {
  if (err) {
    console.error(`Failed to obtain the ringer mode.​ ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the ringer mode is obtained ${value}.`);
});

getRingerMode^(deprecated)

getRingerMode(): Promise&lt;AudioRingMode&gt;

Obtains the ringer mode. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use getRingerMode in AudioVolumeGroupManager.

System capability: SystemCapability.Multimedia.Audio.Communication

Return value

Type	Description
Promise<AudioRingMode>	Promise used to return the ringer mode.

Example

audioManager.getRingerMode().then((value: audio.AudioRingMode) => {
  console.info(`Promise returned to indicate that the ringer mode is obtained ${value}.`);
});

getDevices^(deprecated)

getDevices(deviceFlag: DeviceFlag, callback: AsyncCallback&lt;AudioDeviceDescriptors&gt;): void

Obtains the audio devices with a specific flag. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use getDevices in AudioRoutingManager.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
deviceFlag	DeviceFlag	Yes	Audio device flag.
callback	AsyncCallback<AudioDeviceDescriptors>	Yes	Callback used to return the device list.

Example

import { BusinessError } from '@ohos.base';
audioManager.getDevices(audio.DeviceFlag.OUTPUT_DEVICES_FLAG, (err: BusinessError, value: audio.AudioDeviceDescriptors) => {
  if (err) {
    console.error(`Failed to obtain the device list. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the device list is obtained.');
});

getDevices^(deprecated)

getDevices(deviceFlag: DeviceFlag): Promise&lt;AudioDeviceDescriptors&gt;

Obtains the audio devices with a specific flag. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use getDevices in AudioRoutingManager.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
deviceFlag	DeviceFlag	Yes	Audio device flag.

Return value

Type	Description
Promise<AudioDeviceDescriptors>	Promise used to return the device list.

Example

audioManager.getDevices(audio.DeviceFlag.OUTPUT_DEVICES_FLAG).then((data: audio.AudioDeviceDescriptors) => {
  console.info('Promise returned to indicate that the device list is obtained.');
});

setDeviceActive^(deprecated)

setDeviceActive(deviceType: ActiveDeviceType, active: boolean, callback: AsyncCallback&lt;void&gt;): void

Sets a device to the active state. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use setCommunicationDevice in AudioRoutingManager.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
deviceType	ActiveDeviceType	Yes	Active audio device type.
active	boolean	Yes	Active state to set. The value true means to set the device to the active state, and false means the opposite.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioManager.setDeviceActive(audio.ActiveDeviceType.SPEAKER, true, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to set the active status of the device. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the device is set to the active status.');
});

setDeviceActive^(deprecated)

setDeviceActive(deviceType: ActiveDeviceType, active: boolean): Promise&lt;void&gt;

Sets a device to the active state. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use setCommunicationDevice in AudioRoutingManager.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
deviceType	ActiveDeviceType	Yes	Active audio device type.
active	boolean	Yes	Active state to set. The value true means to set the device to the active state, and false means the opposite.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

audioManager.setDeviceActive(audio.ActiveDeviceType.SPEAKER, true).then(() => {
  console.info('Promise returned to indicate that the device is set to the active status.');
});

isDeviceActive^(deprecated)

isDeviceActive(deviceType: ActiveDeviceType, callback: AsyncCallback&lt;boolean&gt;): void

Checks whether a device is active. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use isCommunicationDeviceActive in AudioRoutingManager.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
deviceType	ActiveDeviceType	Yes	Active audio device type.
callback	AsyncCallback<boolean>	Yes	Callback used to return the active state of the device.

Example

import { BusinessError } from '@ohos.base';
audioManager.isDeviceActive(audio.ActiveDeviceType.SPEAKER, (err: BusinessError, value: boolean) => {
  if (err) {
    console.error(`Failed to obtain the active status of the device. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the active status of the device is obtained.');
});

isDeviceActive^(deprecated)

isDeviceActive(deviceType: ActiveDeviceType): Promise&lt;boolean&gt;

Checks whether a device is active. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use isCommunicationDeviceActive in AudioRoutingManager.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
deviceType	ActiveDeviceType	Yes	Active audio device type.

Return value

Type	Description
Promise<boolean>	Promise used to return the active state of the device.

Example

audioManager.isDeviceActive(audio.ActiveDeviceType.SPEAKER).then((value: boolean) => {
  console.info(`Promise returned to indicate that the active status of the device is obtained ${value}.`);
});

setMicrophoneMute^(deprecated)

setMicrophoneMute(mute: boolean, callback: AsyncCallback&lt;void&gt;): void

Mutes or unmutes the microphone. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use setMicrophoneMute in AudioVolumeGroupManager.

Required permissions: ohos.permission.MICROPHONE

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
mute	boolean	Yes	Mute status to set. The value true means to mute the microphone, and false means the opposite.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioManager.setMicrophoneMute(true, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to mute the microphone. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the microphone is muted.');
});

setMicrophoneMute^(deprecated)

setMicrophoneMute(mute: boolean): Promise&lt;void&gt;

Mutes or unmutes the microphone. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use setMicrophoneMute in AudioVolumeGroupManager.

Required permissions: ohos.permission.MICROPHONE

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
mute	boolean	Yes	Mute status to set. The value true means to mute the microphone, and false means the opposite.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

audioManager.setMicrophoneMute(true).then(() => {
  console.info('Promise returned to indicate that the microphone is muted.');
});

isMicrophoneMute^(deprecated)

isMicrophoneMute(callback: AsyncCallback&lt;boolean&gt;): void

Checks whether the microphone is muted. This API uses an asynchronous callback to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use isMicrophoneMute in AudioVolumeGroupManager.

Required permissions: ohos.permission.MICROPHONE

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<boolean>	Yes	Callback used to return the mute status of the microphone. The value true means that the microphone is muted, and false means the opposite.

Example

import { BusinessError } from '@ohos.base';
audioManager.isMicrophoneMute((err: BusinessError, value: boolean) => {
  if (err) {
    console.error(`Failed to obtain the mute status of the microphone. ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the mute status of the microphone is obtained ${value}.`);
});

isMicrophoneMute^(deprecated)

isMicrophoneMute(): Promise&lt;boolean&gt;

Checks whether the microphone is muted. This API uses a promise to return the result.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use isMicrophoneMute in AudioVolumeGroupManager.

Required permissions: ohos.permission.MICROPHONE

System capability: SystemCapability.Multimedia.Audio.Device

Return value

Type	Description
Promise<boolean>	Promise used to return the mute status of the microphone. The value true means that the microphone is muted, and false means the opposite.

Example

audioManager.isMicrophoneMute().then((value: boolean) => {
  console.info(`Promise returned to indicate that the mute status of the microphone is obtained ${value}.`);
});

on(‘volumeChange’)^(deprecated)

on(type: ‘volumeChange’, callback: Callback<VolumeEvent>): void

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use on(‘volumeChange’) in AudioVolumeManager.

Subscribes to system volume change events.

System API: This is a system API.

Currently, when multiple AudioManager instances are used in a single process, only the subscription of the last instance takes effect, and the subscription of other instances is overwritten (even if the last instance does not initiate a subscription). Therefore, you are advised to use a single AudioManager instance.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘volumeChange’ is triggered when the system volume is changed.
callback	Callback<VolumeEvent>	Yes	Callback used to return the result.

Example

audioManager.on('volumeChange', (volumeEvent: audio.VolumeEvent) => {
  console.info(`VolumeType of stream: ${volumeEvent.volumeType} `);
  console.info(`Volume level: ${volumeEvent.volume} `);
  console.info(`Whether to updateUI: ${volumeEvent.updateUi} `);
});

on(‘ringerModeChange’)^(deprecated)

on(type: ‘ringerModeChange’, callback: Callback<AudioRingMode>): void

Subscribes to ringer mode change events.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use on(‘ringerModeChange’) in AudioVolumeGroupManager.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘ringerModeChange’ is triggered when the ringer mode is changed.
callback	Callback<AudioRingMode>	Yes	Callback used to return the result.

Example

audioManager.on('ringerModeChange', (ringerMode: audio.AudioRingMode) => {
  console.info(`Updated ringermode: ${ringerMode}`);
});

on(‘deviceChange’)^(deprecated)

on(type: ‘deviceChange’, callback: Callback): void

Subscribes to device change events. When a device is connected or disconnected, registered clients will receive the callback.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use on(‘deviceChange’) in AudioRoutingManager.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘deviceChange’ is triggered when the device connection status is changed.
callback	Callback<DeviceChangeAction>	Yes	Callback used to return the device update details.

Example

audioManager.on('deviceChange', (deviceChanged: audio.DeviceChangeAction) => {
  console.info(`device change type : ${deviceChanged.type} `);
  console.info(`device descriptor size : ${deviceChanged.deviceDescriptors.length} `);
  console.info(`device change descriptor : ${deviceChanged.deviceDescriptors[0].deviceRole} `);
  console.info(`device change descriptor : ${deviceChanged.deviceDescriptors[0].deviceType} `);
});

off(‘deviceChange’)^(deprecated)

off(type: ‘deviceChange’, callback?: Callback): void

Unsubscribes from device change events.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use off(‘deviceChange’) in AudioRoutingManager.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘deviceChange’ is triggered when the device connection status is changed.
callback	Callback<DeviceChangeAction>	No	Callback used to return the device update details.

Example

audioManager.off('deviceChange');

on(‘interrupt’)

on(type: ‘interrupt’, interrupt: AudioInterrupt, callback: Callback<InterruptAction>): void

Subscribes to audio interruption events. When the application’s audio is interrupted by another playback event, the application will receive the callback.

Same as on(‘audioInterrupt’), this API is used to listen for focus changes. However, this API is used in scenarios without audio streams (no AudioRenderer instance is created), such as frequency modulation (FM) and voice wakeup.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘interrupt’ is triggered when the audio playback of the current application is interrupted by another application.
interrupt	AudioInterrupt	Yes	Audio interruption event type.
callback	Callback<InterruptAction>	Yes	Callback invoked for the audio interruption event.

Example

import audio from '@ohos.multimedia.audio';
let interAudioInterrupt: audio.AudioInterrupt = {
  streamUsage:2,
  contentType:0,
  pauseWhenDucked:true
};
audioManager.on('interrupt', interAudioInterrupt, (InterruptAction: audio.InterruptAction) => {
  if (InterruptAction.actionType === 0) {
    console.info('An event to gain the audio focus starts.');
    console.info(`Focus gain event: ${InterruptAction} `);
  }
  if (InterruptAction.actionType === 1) {
    console.info('An audio interruption event starts.');
    console.info(`Audio interruption event: ${InterruptAction} `);
  }
});

off(‘interrupt’)

off(type: ‘interrupt’, interrupt: AudioInterrupt, callback?: Callback<InterruptAction>): void

Unsubscribes from audio interruption events.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘interrupt’ is triggered when the audio playback of the current application is interrupted by another application.
interrupt	AudioInterrupt	Yes	Audio interruption event type.
callback	Callback<InterruptAction>	No	Callback invoked for the audio interruption event.

Example

import audio from '@ohos.multimedia.audio';
let interAudioInterrupt: audio.AudioInterrupt = {
  streamUsage:2,
  contentType:0,
  pauseWhenDucked:true
};
audioManager.off('interrupt', interAudioInterrupt, (InterruptAction: audio.InterruptAction) => {
  if (InterruptAction.actionType === 0) {
    console.info('An event to release the audio focus starts.');
    console.info(`Focus release event: ${InterruptAction} `);
  }
});

AudioVolumeManager⁹⁺

Implements audio volume management. Before calling an API in AudioVolumeManager, you must use getVolumeManager to obtain an AudioVolumeManager instance.

getVolumeGroupInfos⁹⁺

getVolumeGroupInfos(networkId: string, callback: AsyncCallback): void

Obtains the volume groups. This API uses an asynchronous callback to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
networkId	string	Yes	Network ID of the device. The network ID of the local device is audio.LOCAL_NETWORK_ID.
callback	AsyncCallback<VolumeGroupInfos>	Yes	Callback used to return the volume group information array.

Example

import { BusinessError } from '@ohos.base';
audioVolumeManager.getVolumeGroupInfos(audio.LOCAL_NETWORK_ID, (err: BusinessError, value: audio.VolumeGroupInfos) => {
  if (err) {
    console.error(`Failed to obtain the volume group infos list. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the volume group infos list is obtained.');
});

getVolumeGroupInfos⁹⁺

getVolumeGroupInfos(networkId: string): Promise

Obtains the volume groups. This API uses a promise to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
networkId	string	Yes	Network ID of the device. The network ID of the local device is audio.LOCAL_NETWORK_ID.

Return value

Type	Description
Promise<VolumeGroupInfos>	Volume group information array.

Example

async function getVolumeGroupInfos(){
  let volumegroupinfos: audio.VolumeGroupInfos = await audio.getAudioManager().getVolumeManager().getVolumeGroupInfos(audio.LOCAL_NETWORK_ID);
  console.info('Promise returned to indicate that the volumeGroup list is obtained.'+JSON.stringify(volumegroupinfos))
}

getVolumeGroupInfosSync¹⁰⁺

getVolumeGroupInfosSync(networkId: string): VolumeGroupInfos

Obtains the volume groups. This API returns the result synchronously.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
networkId	string	Yes	Network ID of the device. The network ID of the local device is audio.LOCAL_NETWORK_ID.

Return value

Type	Description
VolumeGroupInfos	Volume group information array.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  let volumegroupinfos: audio.VolumeGroupInfos = audioVolumeManager.getVolumeGroupInfosSync(audio.LOCAL_NETWORK_ID);
  console.info(`Indicate that the volumeGroup list is obtained. ${JSON.stringify(volumegroupinfos)}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Failed to obtain the volumeGroup list ${error}`);
}

getVolumeGroupManager⁹⁺

getVolumeGroupManager(groupId: number, callback: AsyncCallback): void

Obtains the volume group manager. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
groupId	number	Yes	Volume group ID.
callback	AsyncCallback<AudioVolumeGroupManager>	Yes	Callback used to return the volume group manager.

Example

import { BusinessError } from '@ohos.base';
let groupid: number = audio.DEFAULT_VOLUME_GROUP_ID;
audioVolumeManager.getVolumeGroupManager(groupid, (err: BusinessError, value: audio.AudioVolumeGroupManager) => {
  if (err) {
    console.error(`Failed to obtain the volume group infos list. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the volume group infos list is obtained.');
});

getVolumeGroupManager⁹⁺

getVolumeGroupManager(groupId: number): Promise

Obtains the volume group manager. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
groupId	number	Yes	Volume group ID.

Return value

Type	Description
Promise< AudioVolumeGroupManager >	Promise used to return the volume group manager.

Example

import audio from '@ohos.multimedia.audio';
let groupid: number = audio.DEFAULT_VOLUME_GROUP_ID;
let audioVolumeGroupManager: audio.AudioVolumeGroupManager|undefined = undefined;
async function getVolumeGroupManager(){
  audioVolumeGroupManager = await audioVolumeManager.getVolumeGroupManager(groupid);
  console.info('Callback invoked to indicate that the volume group infos list is obtained.');
}

getVolumeGroupManagerSync¹⁰⁺

getVolumeGroupManagerSync(groupId: number): AudioVolumeGroupManager

Obtains the volume group manager. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
groupId	number	Yes	Volume group ID.

Return value

Type	Description
AudioVolumeGroupManager	Volume group manager.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  let audioVolumeGroupManager: audio.AudioVolumeGroupManager = audioVolumeManager.getVolumeGroupManagerSync(audio.DEFAULT_VOLUME_GROUP_ID);
  console.info(`Get audioVolumeGroupManager success.`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Failed to get audioVolumeGroupManager, error: ${error}`);
}

on(‘volumeChange’)⁹⁺

on(type: ‘volumeChange’, callback: Callback<VolumeEvent>): void

Subscribes to system volume change events. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘volumeChange’ is triggered when the system volume is changed.
callback	Callback<VolumeEvent>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioVolumeManager.on('volumeChange', (volumeEvent: audio.VolumeEvent) => {
  console.info(`VolumeType of stream: ${volumeEvent.volumeType} `);
  console.info(`Volume level: ${volumeEvent.volume} `);
  console.info(`Whether to updateUI: ${volumeEvent.updateUi} `);
});

AudioVolumeGroupManager⁹⁺

Manages the volume of an audio group. Before calling any API in AudioVolumeGroupManager, you must use getVolumeGroupManager to obtain an AudioVolumeGroupManager instance.

setVolume⁹⁺

setVolume(volumeType: AudioVolumeType, volume: number, callback: AsyncCallback&lt;void&gt;): void

Sets the volume for a stream. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer when volumeType is set to AudioVolumeType.RINGTONE.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
volume	number	Yes	Volume to set. The value range can be obtained by calling getMinVolume and getMaxVolume.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.setVolume(audio.AudioVolumeType.MEDIA, 10, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to set the volume. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate a successful volume setting.');
});

setVolume⁹⁺

setVolume(volumeType: AudioVolumeType, volume: number): Promise&lt;void&gt;

Sets the volume for a stream. This API uses a promise to return the result.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer when volumeType is set to AudioVolumeType.RINGTONE.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
volume	number	Yes	Volume to set. The value range can be obtained by calling getMinVolume and getMaxVolume.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

audioVolumeGroupManager.setVolume(audio.AudioVolumeType.MEDIA, 10).then(() => {
  console.info('Promise returned to indicate a successful volume setting.');
});

getVolume⁹⁺

getVolume(volumeType: AudioVolumeType, callback: AsyncCallback&lt;number&gt;): void

Obtains the volume of a stream. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
callback	AsyncCallback<number>	Yes	Callback used to return the volume.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.getVolume(audio.AudioVolumeType.MEDIA, (err: BusinessError, value: number) => {
  if (err) {
    console.error(`Failed to obtain the volume. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the volume is obtained.');
});

getVolume⁹⁺

getVolume(volumeType: AudioVolumeType): Promise&lt;number&gt;

Obtains the volume of a stream. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
Promise<number>	Promise used to return the volume.

Example

audioVolumeGroupManager.getVolume(audio.AudioVolumeType.MEDIA).then((value: number) => {
  console.info(`Promise returned to indicate that the volume is obtained ${value}.`);
});

getVolumeSync¹⁰⁺

getVolumeSync(volumeType: AudioVolumeType): number;

Obtains the volume of a stream. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
number	Volume of the stream.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  let value: number = audioVolumeGroupManager.getVolumeSync(audio.AudioVolumeType.MEDIA);
  console.info(`Indicate that the volume is obtained ${value}.`);
} catch (err) {
  let error = err as BusinessError;
  console.info(`Failed to obtain the volume, error ${error}.`);
}

getMinVolume⁹⁺

getMinVolume(volumeType: AudioVolumeType, callback: AsyncCallback&lt;number&gt;): void

Obtains the minimum volume allowed for a stream. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
callback	AsyncCallback<number>	Yes	Callback used to return the minimum volume.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.getMinVolume(audio.AudioVolumeType.MEDIA, (err: BusinessError, value: number) => {
  if (err) {
    console.error(`Failed to obtain the minimum volume. ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the minimum volume is obtained. ${value}`);
});

getMinVolume⁹⁺

getMinVolume(volumeType: AudioVolumeType): Promise&lt;number&gt;

Obtains the minimum volume allowed for a stream. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
Promise<number>	Promise used to return the minimum volume.

Example

audioVolumeGroupManager.getMinVolume(audio.AudioVolumeType.MEDIA).then((value: number) => {
  console.info(`Promised returned to indicate that the minimum volume is obtained ${value}.`);
});

getMinVolumeSync¹⁰⁺

getMinVolumeSync(volumeType: AudioVolumeType): number;

Obtains the minimum volume allowed for a stream. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
number	Minimum volume.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  let value: number = audioVolumeGroupManager.getMinVolumeSync(audio.AudioVolumeType.MEDIA);
  console.info(`Indicate that the minimum volume is obtained ${value}.`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Failed to obtain the minimum volume, error ${error}.`);
}

getMaxVolume⁹⁺

getMaxVolume(volumeType: AudioVolumeType, callback: AsyncCallback&lt;number&gt;): void

Obtains the maximum volume allowed for a stream. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
callback	AsyncCallback<number>	Yes	Callback used to return the maximum volume.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.getMaxVolume(audio.AudioVolumeType.MEDIA, (err: BusinessError, value: number) => {
  if (err) {
    console.error(`Failed to obtain the maximum volume. ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the maximum volume is obtained. ${value}`);
});

getMaxVolume⁹⁺

getMaxVolume(volumeType: AudioVolumeType): Promise&lt;number&gt;

Obtains the maximum volume allowed for a stream. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
Promise<number>	Promise used to return the maximum volume.

Example

audioVolumeGroupManager.getMaxVolume(audio.AudioVolumeType.MEDIA).then((data: number) => {
  console.info('Promised returned to indicate that the maximum volume is obtained.');
});

getMaxVolumeSync¹⁰⁺

getMaxVolumeSync(volumeType: AudioVolumeType): number;

Obtains the maximum volume allowed for a stream. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
number	Maximum volume.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  let value: number = audioVolumeGroupManager.getMaxVolumeSync(audio.AudioVolumeType.MEDIA);
  console.info(`Indicate that the maximum volume is obtained. ${value}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Failed to obtain the maximum volume, error ${error}.`);
}

mute⁹⁺

mute(volumeType: AudioVolumeType, mute: boolean, callback: AsyncCallback&lt;void&gt;): void

Mutes or unmutes a stream. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer when volumeType is set to AudioVolumeType.RINGTONE.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
mute	boolean	Yes	Mute status to set. The value true means to mute the stream, and false means the opposite.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.mute(audio.AudioVolumeType.MEDIA, true, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to mute the stream. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the stream is muted.');
});

mute⁹⁺

mute(volumeType: AudioVolumeType, mute: boolean): Promise&lt;void&gt;

Mutes or unmutes a stream. This API uses a promise to return the result.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer when volumeType is set to AudioVolumeType.RINGTONE.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
mute	boolean	Yes	Mute status to set. The value true means to mute the stream, and false means the opposite.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

audioVolumeGroupManager.mute(audio.AudioVolumeType.MEDIA, true).then(() => {
  console.info('Promise returned to indicate that the stream is muted.');
});

isMute⁹⁺

isMute(volumeType: AudioVolumeType, callback: AsyncCallback&lt;boolean&gt;): void

Checks whether a stream is muted. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
callback	AsyncCallback<boolean>	Yes	Callback used to return the mute status of the stream. The value true means that the stream is muted, and false means the opposite.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.isMute(audio.AudioVolumeType.MEDIA, (err: BusinessError, value: boolean) => {
  if (err) {
    console.error(`Failed to obtain the mute status. ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the mute status of the stream is obtained ${value}.`);
});

isMute⁹⁺

isMute(volumeType: AudioVolumeType): Promise&lt;boolean&gt;

Checks whether a stream is muted. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
Promise<boolean>	Promise used to return the mute status of the stream. The value true means that the stream is muted, and false means the opposite.

Example

audioVolumeGroupManager.isMute(audio.AudioVolumeType.MEDIA).then((value: boolean) => {
  console.info(`Promise returned to indicate that the mute status of the stream is obtained ${value}.`);
});

isMuteSync¹⁰⁺

isMuteSync(volumeType: AudioVolumeType): boolean

Checks whether a stream is muted. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.

Return value

Type	Description
boolean	Returns true if the stream is muted; returns false otherwise.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  let value: boolean = audioVolumeGroupManager.isMuteSync(audio.AudioVolumeType.MEDIA);
  console.info(`Indicate that the mute status of the stream is obtained ${value}.`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Failed to obtain the mute status of the stream, error ${error}.`);
}

setRingerMode⁹⁺

setRingerMode(mode: AudioRingMode, callback: AsyncCallback&lt;void&gt;): void

Sets the ringer mode. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
mode	AudioRingMode	Yes	Ringer mode.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.setRingerMode(audio.AudioRingMode.RINGER_MODE_NORMAL, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to set the ringer mode.​ ${err}`);
    return;
  }
  console.info('Callback invoked to indicate a successful setting of the ringer mode.');
});

setRingerMode⁹⁺

setRingerMode(mode: AudioRingMode): Promise&lt;void&gt;

Sets the ringer mode. This API uses a promise to return the result.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
mode	AudioRingMode	Yes	Ringer mode.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

audioVolumeGroupManager.setRingerMode(audio.AudioRingMode.RINGER_MODE_NORMAL).then(() => {
  console.info('Promise returned to indicate a successful setting of the ringer mode.');
});

getRingerMode⁹⁺

getRingerMode(callback: AsyncCallback&lt;AudioRingMode&gt;): void

Obtains the ringer mode. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<AudioRingMode>	Yes	Callback used to return the ringer mode.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.getRingerMode((err: BusinessError, value: audio.AudioRingMode) => {
  if (err) {
    console.error(`Failed to obtain the ringer mode.​ ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the ringer mode is obtained ${value}.`);
});

getRingerMode⁹⁺

getRingerMode(): Promise&lt;AudioRingMode&gt;

Obtains the ringer mode. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Return value

Type	Description
Promise<AudioRingMode>	Promise used to return the ringer mode.

Example

audioVolumeGroupManager.getRingerMode().then((value: audio.AudioRingMode) => {
  console.info(`Promise returned to indicate that the ringer mode is obtained ${value}.`);
});

getRingerModeSync¹⁰⁺

getRingerModeSync(): AudioRingMode

Obtains the ringer mode. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Volume

Return value

Type	Description
AudioRingMode	Ringer mode.

Example

import { BusinessError } from '@ohos.base';

try {
  let value: audio.AudioRingMode = audioVolumeGroupManager.getRingerModeSync();
  console.info(`Indicate that the ringer mode is obtained ${value}.`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Failed to obtain the ringer mode, error ${error}.`);
}

on(‘ringerModeChange’)⁹⁺

on(type: ‘ringerModeChange’, callback: Callback<AudioRingMode>): void

Subscribes to ringer mode change events.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘ringerModeChange’ is triggered when the ringer mode is changed.
callback	Callback<AudioRingMode>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioVolumeGroupManager.on('ringerModeChange', (ringerMode: audio.AudioRingMode) => {
  console.info(`Updated ringermode: ${ringerMode}`);
});

setMicrophoneMute⁹⁺

setMicrophoneMute(mute: boolean, callback: AsyncCallback&lt;void&gt;): void

Mutes or unmutes the microphone. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.MANAGE_AUDIO_CONFIG

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
mute	boolean	Yes	Mute status to set. The value true means to mute the microphone, and false means the opposite.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.setMicrophoneMute(true, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to mute the microphone. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the microphone is muted.');
});

setMicrophoneMute⁹⁺

setMicrophoneMute(mute: boolean): Promise&lt;void&gt;

Mutes or unmutes the microphone. This API uses a promise to return the result.

Required permissions: ohos.permission.MANAGE_AUDIO_CONFIG

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
mute	boolean	Yes	Mute status to set. The value true means to mute the microphone, and false means the opposite.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

audioVolumeGroupManager.setMicrophoneMute(true).then(() => {
  console.info('Promise returned to indicate that the microphone is muted.');
});

isMicrophoneMute⁹⁺

isMicrophoneMute(callback: AsyncCallback&lt;boolean&gt;): void

Checks whether the microphone is muted. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<boolean>	Yes	Callback used to return the mute status of the microphone. The value true means that the microphone is muted, and false means the opposite.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.isMicrophoneMute((err: BusinessError, value: boolean) => {
  if (err) {
    console.error(`Failed to obtain the mute status of the microphone. ${err}`);
    return;
  }
  console.info(`Callback invoked to indicate that the mute status of the microphone is obtained ${value}.`);
});

isMicrophoneMute⁹⁺

isMicrophoneMute(): Promise&lt;boolean&gt;

Checks whether the microphone is muted. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Return value

Type	Description
Promise<boolean>	Promise used to return the mute status of the microphone. The value true means that the microphone is muted, and false means the opposite.

Example

audioVolumeGroupManager.isMicrophoneMute().then((value: boolean) => {
  console.info(`Promise returned to indicate that the mute status of the microphone is obtained ${value}.`);
});

isMicrophoneMuteSync¹⁰⁺

isMicrophoneMuteSync(): boolean

Checks whether the microphone is muted. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Volume

Return value

Type	Description
boolean	Returns true if the microphone is muted; returns false otherwise.

Example

import { BusinessError } from '@ohos.base';

try {
  let value: boolean = audioVolumeGroupManager.isMicrophoneMuteSync();
  console.info(`Indicate that the mute status of the microphone is obtained ${value}.`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Failed to obtain the mute status of the microphone, error ${error}.`);
}

on(‘micStateChange’)⁹⁺

on(type: ‘micStateChange’, callback: Callback&lt;MicStateChangeEvent&gt;): void

Subscribes to system microphone state change events.

Currently, when multiple AudioManager instances are used in a single process, only the subscription of the last instance takes effect, and the subscription of other instances is overwritten (even if the last instance does not initiate a subscription). Therefore, you are advised to use a single AudioManager instance.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘micStateChange’ is triggered when the system microphone state is changed.
callback	Callback<MicStateChangeEvent>	Yes	Callback used to return the changed microphone state.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioVolumeGroupManager.on('micStateChange', (micStateChange: audio.MicStateChangeEvent) => {
  console.info(`Current microphone status is: ${micStateChange.mute} `);
});

isVolumeUnadjustable¹⁰⁺

isVolumeUnadjustable(): boolean

Checks whether the fixed volume mode is enabled. When the fixed volume mode is enabled, the volume cannot be adjusted. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Volume

Return value

Type	Description
boolean	Returns the status of the fixed volume mode. The value true means that the fixed volume mode is enabled, and false means the opposite.

Example

let volumeAdjustSwitch: boolean = audioVolumeGroupManager.isVolumeUnadjustable();
console.info(`Whether it is volume unadjustable: ${volumeAdjustSwitch}.`);

adjustVolumeByStep¹⁰⁺

adjustVolumeByStep(adjustType: VolumeAdjustType, callback: AsyncCallback&lt;void&gt;): void

Adjusts the volume of the stream with the highest priority by step. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer when volumeType is set to AudioVolumeType.RINGTONE.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
adjustType	VolumeAdjustType	Yes	Volume adjustment type.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by callback.
6800301	System error. Return by callback.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.adjustVolumeByStep(audio.VolumeAdjustType.VOLUME_UP, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to adjust the volume by step. ${err}`);
    return;
  } else {
    console.info('Success to adjust the volume by step.');
  }
});

adjustVolumeByStep¹⁰⁺

adjustVolumeByStep(adjustType: VolumeAdjustType): Promise&lt;void&gt;

Adjusts the volume of the stream with the highest priority by step. This API uses a promise to return the result.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer when volumeType is set to AudioVolumeType.RINGTONE.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
adjustType	VolumeAdjustType	Yes	Volume adjustment type.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by promise.
6800301	System error. Return by promise.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.adjustVolumeByStep(audio.VolumeAdjustType.VOLUME_UP).then(() => {
  console.info('Success to adjust the volume by step.');
}).catch((error: BusinessError) => {
  console.error('Fail to adjust the volume by step.');
});

adjustSystemVolumeByStep¹⁰⁺

adjustSystemVolumeByStep(volumeType: AudioVolumeType, adjustType: VolumeAdjustType, callback: AsyncCallback&lt;void&gt;): void

Adjusts the volume of a stream by step. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer when volumeType is set to AudioVolumeType.RINGTONE.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
adjustType	VolumeAdjustType	Yes	Volume adjustment type.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by callback.
6800301	System error. Return by callback.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.adjustSystemVolumeByStep(audio.AudioVolumeType.MEDIA, audio.VolumeAdjustType.VOLUME_UP, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to adjust the system volume by step ${err}`);
  } else {
    console.info('Success to adjust the system volume by step.');
  }
});

adjustSystemVolumeByStep¹⁰⁺

adjustSystemVolumeByStep(volumeType: AudioVolumeType, adjustType: VolumeAdjustType): Promise&lt;void&gt;

Adjusts the volume of a stream by step. This API uses a promise to return the result.

Required permissions: ohos.permission.ACCESS_NOTIFICATION_POLICY

This permission is required only for muting or unmuting the ringer when volumeType is set to AudioVolumeType.RINGTONE.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
adjustType	VolumeAdjustType	Yes	Volume adjustment type.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by promise.
6800301	System error. Return by promise.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.adjustSystemVolumeByStep(audio.AudioVolumeType.MEDIA, audio.VolumeAdjustType.VOLUME_UP).then(() => {
  console.info('Success to adjust the system volume by step.');
}).catch((error: BusinessError) => {
  console.error('Fail to adjust the system volume by step.');
});

getSystemVolumeInDb¹⁰⁺

getSystemVolumeInDb(volumeType: AudioVolumeType, volumeLevel: number, device: DeviceType, callback: AsyncCallback&lt;number&gt;): void

Obtains the volume gain. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
volumeLevel	number	Yes	Volume level.
device	DeviceType	Yes	Device type.
callback	AsyncCallback<number>	Yes	Callback used to return the volume gain (in dB).

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by callback.
6800301	System error. Return by callback.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.getSystemVolumeInDb(audio.AudioVolumeType.MEDIA, 3, audio.DeviceType.SPEAKER, (err: BusinessError, dB: number) => {
  if (err) {
    console.error(`Failed to get the volume DB. ${err}`);
  } else {
    console.info(`Success to get the volume DB. ${dB}`);
  }
});

getSystemVolumeInDb¹⁰⁺

getSystemVolumeInDb(volumeType: AudioVolumeType, volumeLevel: number, device: DeviceType): Promise&lt;number&gt;

Obtains the volume gain. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
volumeLevel	number	Yes	Volume level.
device	DeviceType	Yes	Device type.

Return value

Type	Description
Promise<number>	Promise used to return the volume gain (in dB).

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by promise.
6800301	System error. Return by promise.

Example

import { BusinessError } from '@ohos.base';
audioVolumeGroupManager.getSystemVolumeInDb(audio.AudioVolumeType.MEDIA, 3, audio.DeviceType.SPEAKER).then((value: number) => {
  console.info(`Success to get the volume DB. ${value}`);
}).catch((error: BusinessError) => {
  console.error(`Fail to adjust the system volume by step. ${error}`);
});

getSystemVolumeInDbSync¹⁰⁺

getSystemVolumeInDbSync(volumeType: AudioVolumeType, volumeLevel: number, device: DeviceType): number

Obtains the volume gain. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Volume

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream type.
volumeLevel	number	Yes	Volume level.
device	DeviceType	Yes	Device type.

Return value

Type	Description
number	Volume gain (in dB).

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  let value: number = audioVolumeGroupManager.getSystemVolumeInDbSync(audio.AudioVolumeType.MEDIA, 3, audio.DeviceType.SPEAKER);
  console.info(`Success to get the volume DB. ${value}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Fail to adjust the system volume by step. ${error}`);
}

AudioStreamManager⁹⁺

Implements audio stream management. Before calling any API in AudioStreamManager, you must use getStreamManager to obtain an AudioStreamManager instance.

getCurrentAudioRendererInfoArray⁹⁺

getCurrentAudioRendererInfoArray(callback: AsyncCallback&lt;AudioRendererChangeInfoArray&gt;): void

Obtains the information about the current audio renderer. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<AudioRendererChangeInfoArray>	Yes	Callback used to return the audio renderer information.

Example

import { BusinessError } from '@ohos.base';
audioStreamManager.getCurrentAudioRendererInfoArray(async (err: BusinessError, AudioRendererChangeInfoArray: audio.AudioRendererChangeInfoArray) => {
  console.info('getCurrentAudioRendererInfoArray **** Get Callback Called ****');
  if (err) {
    console.error(`getCurrentAudioRendererInfoArray :ERROR: ${err}`);
  } else {
    if (AudioRendererChangeInfoArray != null) {
      for (let i = 0; i < AudioRendererChangeInfoArray.length; i++) {
        let AudioRendererChangeInfo: audio.AudioRendererChangeInfo = AudioRendererChangeInfoArray[i];
        console.info(`StreamId for ${i} is: ${AudioRendererChangeInfo.streamId}`);
        console.info(`ClientUid for ${i} is: ${AudioRendererChangeInfo.clientUid}`);
        console.info(`Content ${i} is: ${AudioRendererChangeInfo.rendererInfo.content}`);
        console.info(`Stream ${i} is: ${AudioRendererChangeInfo.rendererInfo.usage}`);
        console.info(`Flag ${i} is: ${AudioRendererChangeInfo.rendererInfo.rendererFlags}`);
        console.info(`State for ${i} is: ${AudioRendererChangeInfo.rendererState}`);
        for (let j = 0;j < AudioRendererChangeInfo.deviceDescriptors.length; j++) {
          console.info(`Id: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].id}`);
          console.info(`Type: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].deviceType}`);
          console.info(`Role: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].deviceRole}`);
          console.info(`Name: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].name}`);
          console.info(`Address: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].address}`);
          console.info(`SampleRate: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].sampleRates[0]}`);
          console.info(`ChannelCount: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].channelCounts[0]}`);
          console.info(`ChannelMask: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].channelMasks[0]}`);
        }
      }
    }
  }
});

getCurrentAudioRendererInfoArray⁹⁺

getCurrentAudioRendererInfoArray(): Promise&lt;AudioRendererChangeInfoArray&gt;

Obtains the information about the current audio renderer. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<AudioRendererChangeInfoArray>	Promise used to return the audio renderer information.

Example

import { BusinessError } from '@ohos.base';
async function getCurrentAudioRendererInfoArray(){
  await audioStreamManager.getCurrentAudioRendererInfoArray().then((AudioRendererChangeInfoArray: audio.AudioRendererChangeInfoArray) => {
    console.info(`getCurrentAudioRendererInfoArray ######### Get Promise is called ##########`);
    if (AudioRendererChangeInfoArray != null) {
      for (let i = 0; i < AudioRendererChangeInfoArray.length; i++) {
        let AudioRendererChangeInfo: audio.AudioRendererChangeInfo = AudioRendererChangeInfoArray[i];
        console.info(`StreamId for ${i} is: ${AudioRendererChangeInfo.streamId}`);
        console.info(`ClientUid for ${i} is: ${AudioRendererChangeInfo.clientUid}`);
        console.info(`Content ${i} is: ${AudioRendererChangeInfo.rendererInfo.content}`);
        console.info(`Stream ${i} is: ${AudioRendererChangeInfo.rendererInfo.usage}`);
        console.info(`Flag ${i} is: ${AudioRendererChangeInfo.rendererInfo.rendererFlags}`);
        console.info(`State for ${i} is: ${AudioRendererChangeInfo.rendererState}`);
        for (let j = 0;j < AudioRendererChangeInfo.deviceDescriptors.length; j++) {
          console.info(`Id: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].id}`);
          console.info(`Type: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].deviceType}`);
          console.info(`Role: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].deviceRole}`);
          console.info(`Name: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].name}`);
          console.info(`Address: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].address}`);
          console.info(`SampleRate: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].sampleRates[0]}`);
          console.info(`ChannelCount: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].channelCounts[0]}`);
          console.info(`ChannelMask: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].channelMasks[0]}`);
        }
      }
    }
  }).catch((err: BusinessError) => {
    console.error(`getCurrentAudioRendererInfoArray :ERROR: ${err}`);
  });
}

getCurrentAudioRendererInfoArraySync¹⁰⁺

getCurrentAudioRendererInfoArraySync(): AudioRendererChangeInfoArray

Obtains the information about the current audio renderer. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
AudioRendererChangeInfoArray	Audio renderer information.

Example

import { BusinessError } from '@ohos.base';

try {
  let audioRendererChangeInfoArray: audio.AudioRendererChangeInfoArray = audioStreamManager.getCurrentAudioRendererInfoArraySync();
  console.info(`getCurrentAudioRendererInfoArraySync success.`);
  if (audioRendererChangeInfoArray != null) {
    for (let i = 0; i < audioRendererChangeInfoArray.length; i++) {
      let AudioRendererChangeInfo: audio.AudioRendererChangeInfo = audioRendererChangeInfoArray[i];
      console.info(`StreamId for ${i} is: ${AudioRendererChangeInfo.streamId}`);
      console.info(`ClientUid for ${i} is: ${AudioRendererChangeInfo.clientUid}`);
      console.info(`Content ${i} is: ${AudioRendererChangeInfo.rendererInfo.content}`);
      console.info(`Stream ${i} is: ${AudioRendererChangeInfo.rendererInfo.usage}`);
      console.info(`Flag ${i} is: ${AudioRendererChangeInfo.rendererInfo.rendererFlags}`);
      console.info(`State for ${i} is: ${AudioRendererChangeInfo.rendererState}`);
      for (let j = 0;j < AudioRendererChangeInfo.deviceDescriptors.length; j++) {
        console.info(`Id: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].id}`);
        console.info(`Type: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].deviceType}`);
        console.info(`Role: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].deviceRole}`);
        console.info(`Name: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].name}`);
        console.info(`Address: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].address}`);
        console.info(`SampleRate: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].sampleRates[0]}`);
        console.info(`ChannelCount: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].channelCounts[0]}`);
        console.info(`ChannelMask: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].channelMasks[0]}`);
      }
    }
  }
} catch (err) {
  let error = err as BusinessError;
  console.error(`getCurrentAudioRendererInfoArraySync :ERROR: ${error}`);
}

getCurrentAudioCapturerInfoArray⁹⁺

getCurrentAudioCapturerInfoArray(callback: AsyncCallback&lt;AudioCapturerChangeInfoArray&gt;): void

Obtains the information about the current audio capturer. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<AudioCapturerChangeInfoArray>	Yes	Callback used to return the audio capturer information.

Example

import { BusinessError } from '@ohos.base';
audioStreamManager.getCurrentAudioCapturerInfoArray(async (err: BusinessError, AudioCapturerChangeInfoArray: audio.AudioCapturerChangeInfoArray) => {
  console.info('getCurrentAudioCapturerInfoArray **** Get Callback Called ****');
  if (err) {
    console.error(`getCurrentAudioCapturerInfoArray :ERROR: ${err}`);
  } else {
    if (AudioCapturerChangeInfoArray != null) {
      for (let i = 0; i < AudioCapturerChangeInfoArray.length; i++) {
        console.info(`StreamId for ${i} is: ${AudioCapturerChangeInfoArray[i].streamId}`);
        console.info(`ClientUid for ${i} is: ${AudioCapturerChangeInfoArray[i].clientUid}`);
        console.info(`Source for ${i} is: ${AudioCapturerChangeInfoArray[i].capturerInfo.source}`);
        console.info(`Flag  ${i} is: ${AudioCapturerChangeInfoArray[i].capturerInfo.capturerFlags}`);
        console.info(`State for ${i} is: ${AudioCapturerChangeInfoArray[i].capturerState}`);
        for (let j = 0; j < AudioCapturerChangeInfoArray[i].deviceDescriptors.length; j++) {
          console.info(`Id: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].id}`);
          console.info(`Type: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].deviceType}`);
          console.info(`Role: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].deviceRole}`);
          console.info(`Name: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].name}`);
          console.info(`Address: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].address}`);
          console.info(`SampleRate: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].sampleRates[0]}`);
          console.info(`ChannelCount: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].channelCounts[0]}`);
          console.info(`ChannelMask: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].channelMasks[0]}`);
        }
      }
    }
  }
});

getCurrentAudioCapturerInfoArray⁹⁺

getCurrentAudioCapturerInfoArray(): Promise&lt;AudioCapturerChangeInfoArray&gt;

Obtains the information about the current audio capturer. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<AudioCapturerChangeInfoArray>	Promise used to return the audio capturer information.

Example

import { BusinessError } from '@ohos.base';
async function getCurrentAudioCapturerInfoArray(){
  await audioStreamManager.getCurrentAudioCapturerInfoArray().then((AudioCapturerChangeInfoArray: audio.AudioCapturerChangeInfoArray) => {
    console.info('getCurrentAudioCapturerInfoArray **** Get Promise Called ****');
    if (AudioCapturerChangeInfoArray != null) {
      for (let i = 0; i < AudioCapturerChangeInfoArray.length; i++) {
        console.info(`StreamId for ${i} is: ${AudioCapturerChangeInfoArray[i].streamId}`);
        console.info(`ClientUid for ${i} is: ${AudioCapturerChangeInfoArray[i].clientUid}`);
        console.info(`Source for ${i} is: ${AudioCapturerChangeInfoArray[i].capturerInfo.source}`);
        console.info(`Flag  ${i} is: ${AudioCapturerChangeInfoArray[i].capturerInfo.capturerFlags}`);
        console.info(`State for ${i} is: ${AudioCapturerChangeInfoArray[i].capturerState}`);
        for (let j = 0; j < AudioCapturerChangeInfoArray[i].deviceDescriptors.length; j++) {
          console.info(`Id: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].id}`);
          console.info(`Type: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].deviceType}`);
          console.info(`Role: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].deviceRole}`);
          console.info(`Name: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].name}`);
          console.info(`Address: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].address}`);
          console.info(`SampleRate: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].sampleRates[0]}`);
          console.info(`ChannelCount: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].channelCounts[0]}`);
          console.info(`ChannelMask: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].channelMasks[0]}`);
        }
      }
    }
  }).catch((err: BusinessError) => {
    console.error(`getCurrentAudioCapturerInfoArray :ERROR: ${err}`);
  });
}

getCurrentAudioCapturerInfoArraySync¹⁰⁺

getCurrentAudioCapturerInfoArraySync(): AudioCapturerChangeInfoArray

Obtains the information about the current audio capturer. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
AudioCapturerChangeInfoArray	Audio capturer information.

Example

import { BusinessError } from '@ohos.base';

try {
  let audioCapturerChangeInfoArray: audio.AudioCapturerChangeInfoArray = audioStreamManager.getCurrentAudioCapturerInfoArraySync();
  console.info('getCurrentAudioCapturerInfoArraySync success.');
  if (audioCapturerChangeInfoArray != null) {
    for (let i = 0; i < audioCapturerChangeInfoArray.length; i++) {
      console.info(`StreamId for ${i} is: ${audioCapturerChangeInfoArray[i].streamId}`);
      console.info(`ClientUid for ${i} is: ${audioCapturerChangeInfoArray[i].clientUid}`);
      console.info(`Source for ${i} is: ${audioCapturerChangeInfoArray[i].capturerInfo.source}`);
      console.info(`Flag  ${i} is: ${audioCapturerChangeInfoArray[i].capturerInfo.capturerFlags}`);
      console.info(`State for ${i} is: ${audioCapturerChangeInfoArray[i].capturerState}`);
      for (let j = 0; j < audioCapturerChangeInfoArray[i].deviceDescriptors.length; j++) {
        console.info(`Id: ${i} : ${audioCapturerChangeInfoArray[i].deviceDescriptors[j].id}`);
        console.info(`Type: ${i} : ${audioCapturerChangeInfoArray[i].deviceDescriptors[j].deviceType}`);
        console.info(`Role: ${i} : ${audioCapturerChangeInfoArray[i].deviceDescriptors[j].deviceRole}`);
        console.info(`Name: ${i} : ${audioCapturerChangeInfoArray[i].deviceDescriptors[j].name}`);
        console.info(`Address: ${i} : ${audioCapturerChangeInfoArray[i].deviceDescriptors[j].address}`);
        console.info(`SampleRate: ${i} : ${audioCapturerChangeInfoArray[i].deviceDescriptors[j].sampleRates[0]}`);
        console.info(`ChannelCount: ${i} : ${audioCapturerChangeInfoArray[i].deviceDescriptors[j].channelCounts[0]}`);
        console.info(`ChannelMask: ${i} : ${audioCapturerChangeInfoArray[i].deviceDescriptors[j].channelMasks[0]}`);
      }
    }
  }
} catch (err) {
  let error = err as BusinessError;
  console.error(`getCurrentAudioCapturerInfoArraySync ERROR: ${error}`);
}

on(‘audioRendererChange’)⁹⁺

on(type: ‘audioRendererChange’, callback: Callback&lt;AudioRendererChangeInfoArray&gt;): void

Subscribes to audio renderer change events.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event 'audioRendererChange' is triggered when the audio renderer is changed.
callback	Callback<AudioRendererChangeInfoArray>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioStreamManager.on('audioRendererChange',  (AudioRendererChangeInfoArray: audio.AudioRendererChangeInfoArray) => {
  for (let i = 0; i < AudioRendererChangeInfoArray.length; i++) {
    let AudioRendererChangeInfo: audio.AudioRendererChangeInfo = AudioRendererChangeInfoArray[i];
    console.info(`## RendererChange on is called for ${i} ##`);
    console.info(`StreamId for ${i} is: ${AudioRendererChangeInfo.streamId}`);
    console.info(`ClientUid for ${i} is: ${AudioRendererChangeInfo.clientUid}`);
    console.info(`Content ${i} is: ${AudioRendererChangeInfo.rendererInfo.content}`);
    console.info(`Stream ${i} is: ${AudioRendererChangeInfo.rendererInfo.usage}`);
    console.info(`Flag ${i} is: ${AudioRendererChangeInfo.rendererInfo.rendererFlags}`);
    console.info(`State for ${i} is: ${AudioRendererChangeInfo.rendererState}`);
    for (let j = 0;j < AudioRendererChangeInfo.deviceDescriptors.length; j++) {
      console.info(`Id: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].id}`);
      console.info(`Type: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].deviceType}`);
      console.info(`Role: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].deviceRole}`);
      console.info(`Name: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].name}`);
      console.info(`Address: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].address}`);
      console.info(`SampleRate: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].sampleRates[0]}`);
      console.info(`ChannelCount: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].channelCounts[0]}`);
      console.info(`ChannelMask: ${i} : ${AudioRendererChangeInfo.deviceDescriptors[j].channelMasks[0]}`);
    }
  }
});

off(‘audioRendererChange’)⁹⁺

off(type: ‘audioRendererChange’): void

Unsubscribes from audio renderer change events.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event 'audioRendererChange' is triggered when the audio renderer is changed.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioStreamManager.off('audioRendererChange');
console.info('######### RendererChange Off is called #########');

on(‘audioCapturerChange’)⁹⁺

on(type: ‘audioCapturerChange’, callback: Callback&lt;AudioCapturerChangeInfoArray&gt;): void

Subscribes to audio capturer change events.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event 'audioCapturerChange' is triggered when the audio capturer is changed.
callback	Callback<AudioCapturerChangeInfoArray>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioStreamManager.on('audioCapturerChange', (AudioCapturerChangeInfoArray: audio.AudioCapturerChangeInfoArray) =>  {
  for (let i = 0; i < AudioCapturerChangeInfoArray.length; i++) {
    console.info(`## CapChange on is called for element ${i} ##`);
    console.info(`StreamId for ${i} is: ${AudioCapturerChangeInfoArray[i].streamId}`);
    console.info(`ClientUid for ${i} is: ${AudioCapturerChangeInfoArray[i].clientUid}`);
    console.info(`Source for ${i} is: ${AudioCapturerChangeInfoArray[i].capturerInfo.source}`);
    console.info(`Flag  ${i} is: ${AudioCapturerChangeInfoArray[i].capturerInfo.capturerFlags}`);
    console.info(`State for ${i} is: ${AudioCapturerChangeInfoArray[i].capturerState}`);
    let devDescriptor: audio.AudioCapturerChangeInfo = AudioCapturerChangeInfoArray[i].deviceDescriptors;
    for (let j = 0; j < AudioCapturerChangeInfoArray[i].deviceDescriptors.length; j++) {
      console.info(`Id: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].id}`);
      console.info(`Type: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].deviceType}`);
      console.info(`Role: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].deviceRole}`);
      console.info(`Name: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].name}`);
      console.info(`Address: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].address}`);
      console.info(`SampleRate: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].sampleRates[0]}`);
      console.info(`ChannelCount: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].channelCounts[0]}`);
      console.info(`ChannelMask: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].channelMasks[0]}`);
    }
  }
});

off(‘audioCapturerChange’)⁹⁺

off(type: ‘audioCapturerChange’): void;

Unsubscribes from audio capturer change events.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event 'audioCapturerChange' is triggered when the audio capturer is changed.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioStreamManager.off('audioCapturerChange');
console.info('######### CapturerChange Off is called #########');

isActive⁹⁺

isActive(volumeType: AudioVolumeType, callback: AsyncCallback&lt;boolean&gt;): void

Checks whether a stream is active. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream types.
callback	AsyncCallback<boolean>	Yes	Callback used to return the active status of the stream. The value true means that the stream is active, and false means the opposite.

Example

import { BusinessError } from '@ohos.base';
audioStreamManager.isActive(audio.AudioVolumeType.MEDIA, (err: BusinessError, value: boolean) => {
if (err) {
  console.error(`Failed to obtain the active status of the stream. ${err}`);
  return;
}
  console.info(`Callback invoked to indicate that the active status of the stream is obtained ${value}.`);
});

isActive⁹⁺

isActive(volumeType: AudioVolumeType): Promise&lt;boolean&gt;

Checks whether a stream is active. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream types.

Return value

Type	Description
Promise<boolean>	Promise used to return the active status of the stream. The value true means that the stream is active, and false means the opposite.

Example

audioStreamManager.isActive(audio.AudioVolumeType.MEDIA).then((value: boolean) => {
  console.info(`Promise returned to indicate that the active status of the stream is obtained ${value}.`);
});

isActiveSync¹⁰⁺

isActiveSync(volumeType: AudioVolumeType): boolean

Checks whether a stream is active. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
volumeType	AudioVolumeType	Yes	Audio stream types.

Return value

Type	Description
boolean	Returns true if the stream is active; returns false otherwise.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  let value: boolean = audioStreamManager.isActiveSync(audio.AudioVolumeType.MEDIA);
  console.info(`Indicate that the active status of the stream is obtained ${value}.`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Failed to obtain the active status of the stream ${error}.`);
}

getAudioEffectInfoArray¹⁰⁺

getAudioEffectInfoArray(usage: StreamUsage, callback: AsyncCallback&lt;AudioEffectInfoArray&gt;): void

Obtains information about the sound effect mode in use. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
usage	StreamUsage	Yes	Audio stream usage.
callback	AsyncCallback<AudioEffectInfoArray>	Yes	Callback used to return the information about the sound effect mode obtained.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by callback.

Example

import { BusinessError } from '@ohos.base';
audioStreamManager.getAudioEffectInfoArray(audio.StreamUsage.STREAM_USAGE_MEDIA, async (err: BusinessError, audioEffectInfoArray: audio.AudioEffectInfoArray) => {
  console.info('getAudioEffectInfoArray **** Get Callback Called ****');
  if (err) {
    console.error(`getAudioEffectInfoArray :ERROR: ${err}`);
    return;
  } else {
    console.info(`The effect modes are: ${audioEffectInfoArray}`);
  }
});

getAudioEffectInfoArray¹⁰⁺

getAudioEffectInfoArray(usage: StreamUsage): Promise&lt;AudioEffectInfoArray&gt;

Obtains information about the sound effect mode in use. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
usage	StreamUsage	Yes	Audio stream usage.

Return value

Type	Description
Promise<AudioEffectInfoArray>	Promise used to return the information about the sound effect mode obtained.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by promise.

Example

import { BusinessError } from '@ohos.base';
audioStreamManager.getAudioEffectInfoArray(audio.StreamUsage.STREAM_USAGE_MEDIA).then((audioEffectInfoArray: audio.AudioEffectInfoArray) => {
  console.info('getAudioEffectInfoArray ######### Get Promise is called ##########');
  console.info(`The effect modes are: ${audioEffectInfoArray}`);
}).catch((err: BusinessError) => {
  console.error(`getAudioEffectInfoArray :ERROR: ${err}`);
});

getAudioEffectInfoArraySync¹⁰⁺

getAudioEffectInfoArraySync(usage: StreamUsage): AudioEffectInfoArray

Obtains information about the sound effect mode in use. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
usage	StreamUsage	Yes	Audio stream usage.

Return value

Type	Description
AudioEffectInfoArray	Information about the sound effect mode.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  let audioEffectInfoArray: audio.AudioEffectInfoArray = audioStreamManager.getAudioEffectInfoArraySync(audio.StreamUsage.STREAM_USAGE_MEDIA);
  console.info(`The effect modes are: ${audioEffectInfoArray}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`getAudioEffectInfoArraySync ERROR: ${error}`);
}

AudioRoutingManager⁹⁺

Implements audio routing management. Before calling any API in AudioRoutingManager, you must use getRoutingManager to obtain an AudioRoutingManager instance.

getDevices⁹⁺

getDevices(deviceFlag: DeviceFlag, callback: AsyncCallback&lt;AudioDeviceDescriptors&gt;): void

Obtains the audio devices with a specific flag. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
deviceFlag	DeviceFlag	Yes	Audio device flag.
callback	AsyncCallback<AudioDeviceDescriptors>	Yes	Callback used to return the device list.

Example

import { BusinessError } from '@ohos.base';
audioRoutingManager.getDevices(audio.DeviceFlag.OUTPUT_DEVICES_FLAG, (err: BusinessError, value: audio.AudioDeviceDescriptors) => {
  if (err) {
    console.error(`Failed to obtain the device list. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the device list is obtained.');
});

getDevices⁹⁺

getDevices(deviceFlag: DeviceFlag): Promise&lt;AudioDeviceDescriptors&gt;

Obtains the audio devices with a specific flag. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
deviceFlag	DeviceFlag	Yes	Audio device flag.

Return value

Type	Description
Promise<AudioDeviceDescriptors>	Promise used to return the device list.

Example

audioRoutingManager.getDevices(audio.DeviceFlag.OUTPUT_DEVICES_FLAG).then((data: audio.AudioDeviceDescriptors) => {
  console.info('Promise returned to indicate that the device list is obtained.');
});

getDevicesSync¹⁰⁺

getDevicesSync(deviceFlag: DeviceFlag): AudioDeviceDescriptors

Obtains the audio devices with a specific flag. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
deviceFlag	DeviceFlag	Yes	Audio device flag.

Return value

Type	Description
AudioDeviceDescriptors	Device list.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  let data: audio.AudioDeviceDescriptors = audioRoutingManager.getDevicesSync(audio.DeviceFlag.OUTPUT_DEVICES_FLAG);
  console.info(`Indicate that the device list is obtained ${data}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Failed to obtain the device list. ${error}`);
}

on(‘deviceChange’)⁹⁺

on(type: ‘deviceChange’, deviceFlag: DeviceFlag, callback: Callback): void

Subscribes to device change events. When a device is connected or disconnected, registered clients will receive the callback.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘deviceChange’ is triggered when the device connection status is changed.
deviceFlag	DeviceFlag	Yes	Audio device flag.
callback	Callback<DeviceChangeAction>	Yes	Callback used to return the device update details.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioRoutingManager.on('deviceChange', audio.DeviceFlag.OUTPUT_DEVICES_FLAG, (deviceChanged: audio.DeviceChangeAction) => {
  console.info('device change type : ' + deviceChanged.type);
  console.info('device descriptor size : ' + deviceChanged.deviceDescriptors.length);
  console.info('device change descriptor : ' + deviceChanged.deviceDescriptors[0].deviceRole);
  console.info('device change descriptor : ' + deviceChanged.deviceDescriptors[0].deviceType);
});

off(‘deviceChange’)⁹⁺

off(type: ‘deviceChange’, callback?: Callback): void

Unsubscribes from device change events.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘deviceChange’ is triggered when the device connection status is changed.
callback	Callback<DeviceChangeAction>	No	Callback used to return the device update details.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioRoutingManager.off('deviceChange');

selectInputDevice⁹⁺

selectInputDevice(inputAudioDevices: AudioDeviceDescriptors, callback: AsyncCallback&lt;void&gt;): void

Selects an audio input device. Only one input device can be selected. This API uses an asynchronous callback to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
inputAudioDevices	AudioDeviceDescriptors	Yes	Input device.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';
let inputAudioDeviceDescriptor: audio.AudioDeviceDescriptors = [{
  deviceRole : audio.DeviceRole.INPUT_DEVICE,
  deviceType : audio.DeviceType.EARPIECE,
  id : 1,
  name : "",
  address : "",
  sampleRates : [44100],
  channelCounts : [2],
  channelMasks : [0],
  networkId : audio.LOCAL_NETWORK_ID,
  interruptGroupId : 1,
  volumeGroupId : 1,
  displayName : "",
}];

async function selectInputDevice(){
  audioRoutingManager.selectInputDevice(inputAudioDeviceDescriptor, (err: BusinessError) => {
    if (err) {
      console.error(`Result ERROR: ${err}`);
    } else {
      console.info('Select input devices result callback: SUCCESS');
    }
  });
}

selectInputDevice⁹⁺

selectInputDevice(inputAudioDevices: AudioDeviceDescriptors): Promise&lt;void&gt;

System API: This is a system API.

Selects an audio input device. Only one input device can be selected. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
inputAudioDevices	AudioDeviceDescriptors	Yes	Input device.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';
let inputAudioDeviceDescriptor: audio.AudioDeviceDescriptors = [{
  deviceRole : audio.DeviceRole.INPUT_DEVICE,
  deviceType : audio.DeviceType.EARPIECE,
  id : 1,
  name : "",
  address : "",
  sampleRates : [44100],
  channelCounts : [2],
  channelMasks : [0],
  networkId : audio.LOCAL_NETWORK_ID,
  interruptGroupId : 1,
  volumeGroupId : 1,
  displayName : "",
}];

async function getRoutingManager(){
  audioRoutingManager.selectInputDevice(inputAudioDeviceDescriptor).then(() => {
    console.info('Select input devices result promise: SUCCESS');
  }).catch((err: BusinessError) => {
    console.error(`Result ERROR: ${err}`);
  });
}

setCommunicationDevice⁹⁺

setCommunicationDevice(deviceType: CommunicationDeviceType, active: boolean, callback: AsyncCallback&lt;void&gt;): void

Sets a communication device to the active state. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
deviceType	CommunicationDeviceType	Yes	Communication device type.
active	boolean	Yes	Active state to set. The value true means to set the device to the active state, and false means the opposite.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRoutingManager.setCommunicationDevice(audio.CommunicationDeviceType.SPEAKER, true, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to set the active status of the device. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the device is set to the active status.');
});

setCommunicationDevice⁹⁺

setCommunicationDevice(deviceType: CommunicationDeviceType, active: boolean): Promise&lt;void&gt;

Sets a communication device to the active state. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
deviceType	CommunicationDeviceType	Yes	Communication device type.
active	boolean	Yes	Active state to set. The value true means to set the device to the active state, and false means the opposite.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

audioRoutingManager.setCommunicationDevice(audio.CommunicationDeviceType.SPEAKER, true).then(() => {
  console.info('Promise returned to indicate that the device is set to the active status.');
});

isCommunicationDeviceActive⁹⁺

isCommunicationDeviceActive(deviceType: CommunicationDeviceType, callback: AsyncCallback&lt;boolean&gt;): void

Checks whether a communication device is active. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
deviceType	CommunicationDeviceType	Yes	Communication device type.
callback	AsyncCallback<boolean>	Yes	Callback used to return the active state of the device.

Example

import { BusinessError } from '@ohos.base';
audioRoutingManager.isCommunicationDeviceActive(audio.CommunicationDeviceType.SPEAKER, (err: BusinessError, value: boolean) => {
  if (err) {
    console.error(`Failed to obtain the active status of the device. ${err}`);
    return;
  }
  console.info('Callback invoked to indicate that the active status of the device is obtained.');
});

isCommunicationDeviceActive⁹⁺

isCommunicationDeviceActive(deviceType: CommunicationDeviceType): Promise&lt;boolean&gt;

Checks whether a communication device is active. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
deviceType	CommunicationDeviceType	Yes	Communication device type.

Return value

Type	Description
Promise<boolean>	Promise used to return the active state of the device.

Example

audioRoutingManager.isCommunicationDeviceActive(audio.CommunicationDeviceType.SPEAKER).then((value: boolean) => {
  console.info(`Promise returned to indicate that the active status of the device is obtained ${value}.`);
});

isCommunicationDeviceActiveSync¹⁰⁺

isCommunicationDeviceActiveSync(deviceType: CommunicationDeviceType): boolean

Checks whether a communication device is active. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Communication

Parameters

Name	Type	Mandatory	Description
deviceType	CommunicationDeviceType	Yes	Communication device type.

Return value

Type	Description
boolean	Active state of the device.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  let value: boolean = audioRoutingManager.isCommunicationDeviceActiveSync(audio.CommunicationDeviceType.SPEAKER);
  console.info(`Indicate that the active status of the device is obtained ${value}.`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Failed to obtain the active status of the device ${error}.`);
}

selectOutputDevice⁹⁺

selectOutputDevice(outputAudioDevices: AudioDeviceDescriptors, callback: AsyncCallback&lt;void&gt;): void

Selects an audio output device. Currently, only one output device can be selected. This API uses an asynchronous callback to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
outputAudioDevices	AudioDeviceDescriptors	Yes	Output device.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';
let outputAudioDeviceDescriptor: audio.AudioDeviceDescriptors = [{
  deviceRole : audio.DeviceRole.OUTPUT_DEVICE,
  deviceType : audio.DeviceType.SPEAKER,
  id : 1,
  name : "",
  address : "",
  sampleRates : [44100],
  channelCounts : [2],
  channelMasks : [0],
  networkId : audio.LOCAL_NETWORK_ID,
  interruptGroupId : 1,
  volumeGroupId : 1,
  displayName : "",
}];

async function selectOutputDevice(){
  audioRoutingManager.selectOutputDevice(outputAudioDeviceDescriptor, (err: BusinessError) => {
    if (err) {
      console.error(`Result ERROR: ${err}`);
    } else {
      console.info('Select output devices result callback: SUCCESS'); }
  });
}

selectOutputDevice⁹⁺

selectOutputDevice(outputAudioDevices: AudioDeviceDescriptors): Promise&lt;void&gt;

System API: This is a system API.

Selects an audio output device. Currently, only one output device can be selected. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
outputAudioDevices	AudioDeviceDescriptors	Yes	Output device.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';
let outputAudioDeviceDescriptor: audio.AudioDeviceDescriptors = [{
  deviceRole : audio.DeviceRole.OUTPUT_DEVICE,
  deviceType : audio.DeviceType.SPEAKER,
  id : 1,
  name : "",
  address : "",
  sampleRates : [44100],
  channelCounts : [2],
  channelMasks : [0],
  networkId : audio.LOCAL_NETWORK_ID,
  interruptGroupId : 1,
  volumeGroupId : 1,
  displayName : "",
}];

async function selectOutputDevice(){
  audioRoutingManager.selectOutputDevice(outputAudioDeviceDescriptor).then(() => {
    console.info('Select output devices result promise: SUCCESS');
  }).catch((err: BusinessError) => {
    console.error(`Result ERROR: ${err}`);
  });
}

selectOutputDeviceByFilter⁹⁺

selectOutputDeviceByFilter(filter: AudioRendererFilter, outputAudioDevices: AudioDeviceDescriptors, callback: AsyncCallback&lt;void&gt;): void

System API: This is a system API.

Selects an audio output device based on the filter criteria. Currently, only one output device can be selected. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
filter	AudioRendererFilter	Yes	Filter criteria.
outputAudioDevices	AudioDeviceDescriptors	Yes	Output device.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';
let outputAudioRendererFilter: audio.AudioRendererFilter = {
  uid : 20010041,
  rendererInfo : {
    content : audio.ContentType.CONTENT_TYPE_MUSIC,
    usage : audio.StreamUsage.STREAM_USAGE_MEDIA,
    rendererFlags : 0
  },
  rendererId : 0
};

let outputAudioDeviceDescriptor: audio.AudioDeviceDescriptors = [{
  deviceRole : audio.DeviceRole.OUTPUT_DEVICE,
  deviceType : audio.DeviceType.SPEAKER,
  id : 1,
  name : "",
  address : "",
  sampleRates : [44100],
  channelCounts : [2],
  channelMasks : [0],
  networkId : audio.LOCAL_NETWORK_ID,
  interruptGroupId : 1,
  volumeGroupId : 1,
  displayName : "",
}];

async function selectOutputDeviceByFilter(){
  audioRoutingManager.selectOutputDeviceByFilter(outputAudioRendererFilter, outputAudioDeviceDescriptor, (err: BusinessError) => {
    if (err) {
      console.error(`Result ERROR: ${err}`);
    } else {
      console.info('Select output devices by filter result callback: SUCCESS'); }
  });
}

selectOutputDeviceByFilter⁹⁺

selectOutputDeviceByFilter(filter: AudioRendererFilter, outputAudioDevices: AudioDeviceDescriptors): Promise&lt;void&gt;

System API: This is a system API.

Selects an audio output device based on the filter criteria. Currently, only one output device can be selected. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
filter	AudioRendererFilter	Yes	Filter criteria.
outputAudioDevices	AudioDeviceDescriptors	Yes	Output device.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';
let outputAudioRendererFilter: audio.AudioRendererFilter = {
  uid : 20010041,
  rendererInfo : {
    content : audio.ContentType.CONTENT_TYPE_MUSIC,
    usage : audio.StreamUsage.STREAM_USAGE_MEDIA,
    rendererFlags : 0
  },
  rendererId : 0
};

let outputAudioDeviceDescriptor: audio.AudioDeviceDescriptors = [{
  deviceRole : audio.DeviceRole.OUTPUT_DEVICE,
  deviceType : audio.DeviceType.SPEAKER,
  id : 1,
  name : "",
  address : "",
  sampleRates : [44100],
  channelCounts : [2],
  channelMasks : [0],
  networkId : audio.LOCAL_NETWORK_ID,
  interruptGroupId : 1,
  volumeGroupId : 1,
  displayName : "",
}];

async function selectOutputDeviceByFilter(){
  audioRoutingManager.selectOutputDeviceByFilter(outputAudioRendererFilter, outputAudioDeviceDescriptor).then(() => {
    console.info('Select output devices by filter result promise: SUCCESS');
  }).catch((err: BusinessError) => {
    console.error(`Result ERROR: ${err}`);
  })
}

getPreferOutputDeviceForRendererInfo¹⁰⁺

getPreferOutputDeviceForRendererInfo(rendererInfo: AudioRendererInfo, callback: AsyncCallback&lt;AudioDeviceDescriptors&gt;): void

Obtains the output device with the highest priority based on the audio renderer information. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
rendererInfo	AudioRendererInfo	Yes	Audio renderer information.
callback	AsyncCallback<AudioDeviceDescriptors>	Yes	Callback used to return the information about the output device with the highest priority.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error. Return by callback.
6800301	System error. Return by callback.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';
let rendererInfo: audio.AudioRendererInfo = {
  usage : audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags : 0
}

async function getPreferOutputDevice() {
  audioRoutingManager.getPreferOutputDeviceForRendererInfo(rendererInfo, (err: BusinessError, desc: audio.AudioDeviceDescriptors) => {
    if (err) {
      console.error(`Result ERROR: ${err}`);
    } else {
      console.info(`device descriptor: ${desc}`);
    }
  });
}

getPreferOutputDeviceForRendererInfo¹⁰⁺

getPreferOutputDeviceForRendererInfo(rendererInfo: AudioRendererInfo): Promise&lt;AudioDeviceDescriptors&gt;

Obtains the output device with the highest priority based on the audio renderer information. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
rendererInfo	AudioRendererInfo	Yes	Audio renderer information.

Return value

Type	Description
Promise<AudioDeviceDescriptors>	Promise used to return the information about the output device with the highest priority.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error. Return by promise.
6800301	System error. Return by promise.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';
let rendererInfo: audio.AudioRendererInfo = {
  usage : audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags : 0
}

async function getPreferOutputDevice() {
  audioRoutingManager.getPreferOutputDeviceForRendererInfo(rendererInfo).then((desc: audio.AudioDeviceDescriptors) => {
    console.info(`device descriptor: ${desc}`);
  }).catch((err: BusinessError) => {
    console.error(`Result ERROR: ${err}`);
  })
}

getPreferredOutputDeviceForRendererInfoSync¹⁰⁺

getPreferredOutputDeviceForRendererInfoSync(rendererInfo: AudioRendererInfo): AudioDeviceDescriptors

Obtains the output device with the highest priority based on the audio renderer information. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
rendererInfo	AudioRendererInfo	Yes	Audio renderer information.

Return value

Type	Description
AudioDeviceDescriptors	Information about the output device with the highest priority.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';

let rendererInfo: audio.AudioRendererInfo = {
  usage : audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags : 0
}

try {
  let desc: audio.AudioDeviceDescriptors = audioRoutingManager.getPreferredOutputDeviceForRendererInfoSync(rendererInfo);
  console.info(`device descriptor: ${desc}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Result ERROR: ${error}`);
}

on(‘preferOutputDeviceChangeForRendererInfo’)¹⁰⁺

on(type: ‘preferOutputDeviceChangeForRendererInfo’, rendererInfo: AudioRendererInfo, callback: Callback): void

Subscribes to the change of the output device with the highest priority. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘preferOutputDeviceChangeForRendererInfo’ is triggered when the output device with the highest priority is changed.
rendererInfo	AudioRendererInfo	Yes	Audio renderer information.
callback	Callback<AudioDeviceDescriptors>	Yes	Callback used to return the information about the output device with the highest priority.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

import audio from '@ohos.multimedia.audio';
let rendererInfo: audio.AudioRendererInfo = {
  usage : audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags : 0
}

audioRoutingManager.on('preferOutputDeviceChangeForRendererInfo', rendererInfo, (desc: audio.AudioDeviceDescriptors) => {
  console.info(`device descriptor: ${desc}`);
});

off(‘preferOutputDeviceChangeForRendererInfo’)¹⁰⁺

off(type: ‘preferOutputDeviceChangeForRendererInfo’, callback?: Callback): void

Unsubscribes from the change of the output device with the highest priority.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘preferOutputDeviceChangeForRendererInfo’ is triggered when the output device with the highest priority is changed.
callback	Callback<AudioDeviceDescriptors>	No	Callback used for unsubscription.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioRoutingManager.off('preferOutputDeviceChangeForRendererInfo');

getPreferredInputDeviceForCapturerInfo¹⁰⁺

getPreferredInputDeviceForCapturerInfo(capturerInfo: AudioCapturerInfo, callback: AsyncCallback&lt;AudioDeviceDescriptors&gt;): void

Obtains the input device with the highest priority based on the audio capturer information. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
capturerInfo	AudioCapturerInfo	Yes	Audio capturer information.
callback	AsyncCallback<AudioDeviceDescriptors>	Yes	Callback used to return the information about the input device with the highest priority.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by callback.
6800301	System error. Return by callback.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';
let capturerInfo: audio.AudioCapturerInfo = {
  source: audio.SourceType.SOURCE_TYPE_MIC,
  capturerFlags: 0
}

audioRoutingManager.getPreferredInputDeviceForCapturerInfo(capturerInfo, (err: BusinessError, desc: audio.AudioDeviceDescriptors) => {
  if (err) {
    console.error(`Result ERROR: ${err}`);
  } else {
    console.info(`device descriptor: ${desc}`);
  }
});

getPreferredInputDeviceForCapturerInfo¹⁰⁺

getPreferredInputDeviceForCapturerInfo(capturerInfo: AudioCapturerInfo): Promise&lt;AudioDeviceDescriptors&gt;

Obtains the input device with the highest priority based on the audio capturer information. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
capturerInfo	AudioCapturerInfo	Yes	Audio capturer information.

Return value

Type	Description
Promise<AudioDeviceDescriptors>	Promise used to return the information about the input device with the highest priority.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by promise.
6800301	System error. Return by promise.

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';
let capturerInfo: audio.AudioCapturerInfo = {
  source: audio.SourceType.SOURCE_TYPE_MIC,
  capturerFlags: 0
}

audioRoutingManager.getPreferredInputDeviceForCapturerInfo(capturerInfo).then((desc: audio.AudioDeviceDescriptors) => {
  console.info(`device descriptor: ${desc}`);
}).catch((err: BusinessError) => {
  console.error(`Result ERROR: ${err}`);
});

getPreferredInputDeviceForCapturerInfoSync¹⁰⁺

getPreferredInputDeviceForCapturerInfoSync(capturerInfo: AudioCapturerInfo): AudioDeviceDescriptors

Obtains the input device with the highest priority based on the audio capturer information. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
capturerInfo	AudioCapturerInfo	Yes	Audio capturer information.

Return value

Type	Description
AudioDeviceDescriptors	Information about the input device with the highest priority.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import audio from '@ohos.multimedia.audio';
import { BusinessError } from '@ohos.base';

let capturerInfo: audio.AudioCapturerInfo = {
  source: audio.SourceType.SOURCE_TYPE_MIC,
  capturerFlags: 0
}

try {
  let desc: audio.AudioDeviceDescriptors = audioRoutingManager.getPreferredInputDeviceForCapturerInfoSync(capturerInfo);
  console.info(`device descriptor: ${desc}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Result ERROR: ${error}`);
}

on(‘preferredInputDeviceChangeForCapturerInfo’)¹⁰⁺

on(type: ‘preferredInputDeviceChangeForCapturerInfo’, capturerInfo: AudioCapturerInfo, callback: Callback): void

Subscribes to the change of the input device with the highest priority. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘preferredInputDeviceChangeForCapturerInfo’ is triggered when the input device with the highest priority is changed.
capturerInfo	AudioCapturerInfo	Yes	Audio capturer information.
callback	Callback<AudioDeviceDescriptors>	Yes	Callback used to return the information about the input device with the highest priority.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

import audio from '@ohos.multimedia.audio';
let capturerInfo: audio.AudioCapturerInfo = {
  source: audio.SourceType.SOURCE_TYPE_MIC,
  capturerFlags: 0
}

audioRoutingManager.on('preferredInputDeviceChangeForCapturerInfo', capturerInfo, (desc: audio.AudioDeviceDescriptors) => {
  console.info(`device descriptor: ${desc}`);
});

off(‘preferredInputDeviceChangeForCapturerInfo’)¹⁰⁺

off(type: ‘preferredInputDeviceChangeForCapturerInfo’, callback?: Callback): void

Unsubscribes from the change of the input device with the highest priority.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘preferredInputDeviceChangeForCapturerInfo’ is triggered when the input device with the highest priority is changed.
callback	Callback<AudioDeviceDescriptors>	No	Callback used for unsubscription.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioRoutingManager.off('preferredInputDeviceChangeForCapturerInfo');

AudioRendererChangeInfoArray⁹⁺

Defines an AudioRenderChangeInfo array, which is read-only.

System capability: SystemCapability.Multimedia.Audio.Renderer

AudioRendererChangeInfo⁹⁺

Describes the audio renderer change event.

System capability: SystemCapability.Multimedia.Audio.Renderer

Name	Type	Readable	Writable	Description
streamId	number	Yes	No	Unique ID of an audio stream.
clientUid	number	Yes	No	UID of the audio renderer client. This is a system API.
rendererInfo	AudioRendererInfo	Yes	No	Audio renderer information.
rendererState	AudioState	Yes	No	Audio state. This is a system API.
deviceDescriptors	AudioDeviceDescriptors	Yes	No	Audio device description.

Example

import audio from '@ohos.multimedia.audio';

const audioManager = audio.getAudioManager();
let audioStreamManager = audioManager.getStreamManager();
let resultFlag = false;

audioStreamManager.on('audioRendererChange',  (AudioRendererChangeInfoArray) => {
  for (let i = 0; i < AudioRendererChangeInfoArray.length; i++) {
    console.info(`## RendererChange on is called for ${i} ##`);
    console.info(`StreamId for ${i} is: ${AudioRendererChangeInfoArray[i].streamId}`);
    console.info(`ClientUid for ${i} is: ${AudioRendererChangeInfoArray[i].clientUid}`);
    console.info(`Content for ${i} is: ${AudioRendererChangeInfoArray[i].rendererInfo.content}`);
    console.info(`Stream for ${i} is: ${AudioRendererChangeInfoArray[i].rendererInfo.usage}`);
    console.info(`Flag ${i} is: ${AudioRendererChangeInfoArray[i].rendererInfo.rendererFlags}`);
    console.info(`State for ${i} is: ${AudioRendererChangeInfoArray[i].rendererState}`);
    let devDescriptor = AudioRendererChangeInfoArray[i].deviceDescriptors;
    for (let j = 0; j < AudioRendererChangeInfoArray[i].deviceDescriptors.length; j++) {
      console.info(`Id: ${i} : ${AudioRendererChangeInfoArray[i].deviceDescriptors[j].id}`);
      console.info(`Type: ${i} : ${AudioRendererChangeInfoArray[i].deviceDescriptors[j].deviceType}`);
      console.info(`Role: ${i} : ${AudioRendererChangeInfoArray[i].deviceDescriptors[j].deviceRole}`);
      console.info(`Name: ${i} : ${AudioRendererChangeInfoArray[i].deviceDescriptors[j].name}`);
      console.info(`Addr: ${i} : ${AudioRendererChangeInfoArray[i].deviceDescriptors[j].address}`);
      console.info(`SR: ${i} : ${AudioRendererChangeInfoArray[i].deviceDescriptors[j].sampleRates[0]}`);
      console.info(`C ${i} : ${AudioRendererChangeInfoArray[i].deviceDescriptors[j].channelCounts[0]}`);
      console.info(`CM: ${i} : ${AudioRendererChangeInfoArray[i].deviceDescriptors[j].channelMasks[0]}`);
    }
    if (AudioRendererChangeInfoArray[i].rendererState == 1 && devDescriptor != null) {
      resultFlag = true;
      console.info(`ResultFlag for ${i} is: ${resultFlag}`);
    }
  }
});

AudioCapturerChangeInfoArray⁹⁺

Defines an AudioCapturerChangeInfo array, which is read-only.

System capability: SystemCapability.Multimedia.Audio.Capturer

AudioCapturerChangeInfo⁹⁺

Describes the audio capturer change event.

System capability: SystemCapability.Multimedia.Audio.Capturer

Name	Type	Readable	Writable	Description
streamId	number	Yes	No	Unique ID of an audio stream.
clientUid	number	Yes	No	UID of the audio capturer client. This is a system API.
capturerInfo	AudioCapturerInfo	Yes	No	Audio capturer information.
capturerState	AudioState	Yes	No	Audio state. This is a system API.
deviceDescriptors	AudioDeviceDescriptors	Yes	No	Audio device description.
muted11+	boolean	Yes	No	Whether the audio capturer is muted. The value true means that the audio capturer is muted, and false means the opposite.

Example

import audio from '@ohos.multimedia.audio';

const audioManager = audio.getAudioManager();
let audioStreamManager = audioManager.getStreamManager();

let resultFlag = false;
audioStreamManager.on('audioCapturerChange', (AudioCapturerChangeInfoArray) =>  {
  for (let i = 0; i < AudioCapturerChangeInfoArray.length; i++) {
    console.info(`## CapChange on is called for element ${i} ##`);
    console.info(`StrId for  ${i} is: ${AudioCapturerChangeInfoArray[i].streamId}`);
    console.info(`CUid for ${i} is: ${AudioCapturerChangeInfoArray[i].clientUid}`);
    console.info(`Src for ${i} is: ${AudioCapturerChangeInfoArray[i].capturerInfo.source}`);
    console.info(`Flag ${i} is: ${AudioCapturerChangeInfoArray[i].capturerInfo.capturerFlags}`);
    console.info(`State for ${i} is: ${AudioCapturerChangeInfoArray[i].capturerState}`);
    let devDescriptor = AudioCapturerChangeInfoArray[i].deviceDescriptors;
    for (let j = 0; j < AudioCapturerChangeInfoArray[i].deviceDescriptors.length; j++) {
      console.info(`Id: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].id}`);
      console.info(`Type: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].deviceType}`);
      console.info(`Role: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].deviceRole}`);
      console.info(`Name: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].name}`);
      console.info(`Addr: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].address}`);
      console.info(`SR: ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].sampleRates[0]}`);
      console.info(`C ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].channelCounts[0]}`);
      console.info(`CM ${i} : ${AudioCapturerChangeInfoArray[i].deviceDescriptors[j].channelMasks[0]}`);
    }
    if (AudioCapturerChangeInfoArray[i].capturerState == 1 && devDescriptor != null) {
      resultFlag = true;
      console.info(`ResultFlag for element ${i} is: ${resultFlag}`);
    }
  }
});

AudioEffectInfoArray¹⁰⁺

Defines an array that contains the audio effect mode corresponding to a specific audio content type (specified by ContentType) and audio stream usage (specified by StreamUsage). The AudioEffectMode array is read-only.

AudioDeviceDescriptors

Defines an AudioDeviceDescriptor array, which is read-only.

AudioDeviceDescriptor

Describes an audio device.

System capability: SystemCapability.Multimedia.Audio.Device

Name	Type	Readable	Writable	Description
deviceRole	DeviceRole	Yes	No	Device role.
deviceType	DeviceType	Yes	No	Device type.
id9+	number	Yes	No	Device ID, which is unique.
name9+	string	Yes	No	Device name. For a Bluetooth device, you must request the ohos.permission.USE_BLUETOOTH permission.
address9+	string	Yes	No	Device address. For a Bluetooth device, you must request the ohos.permission.USE_BLUETOOTH permission.
sampleRates9+	Array<number>	Yes	No	Supported sampling rates.
channelCounts9+	Array<number>	Yes	No	Number of channels supported.
channelMasks9+	Array<number>	Yes	No	Supported channel masks.
displayName10+	string	Yes	No	Display name of the device.
networkId9+	string	Yes	No	ID of the device network. This is a system API.
interruptGroupId9+	number	Yes	No	ID of the interruption group to which the device belongs. This is a system API.
volumeGroupId9+	number	Yes	No	ID of the volume group to which the device belongs. This is a system API.
encodingTypes11+	Array<AudioEncodingType>	Yes	No	Supported encoding types.

Example

import audio from '@ohos.multimedia.audio';

function displayDeviceProp(value: audio.AudioDeviceDescriptor) {
  deviceRoleValue = value.deviceRole;
  deviceTypeValue = value.deviceType;
}

let deviceRoleValue: audio.DeviceRole|undefined = undefined;;
let deviceTypeValue: audio.DeviceType|undefined = undefined;;
audio.getAudioManager().getDevices(1).then((value: audio.AudioDeviceDescriptors) => {
  console.info('AudioFrameworkTest: Promise: getDevices OUTPUT_DEVICES_FLAG');
  value.forEach(displayDeviceProp);
  if (deviceTypeValue != undefined && deviceRoleValue != undefined){
    console.info('AudioFrameworkTest: Promise: getDevices : OUTPUT_DEVICES_FLAG :  PASS');
  } else {
    console.error('AudioFrameworkTest: Promise: getDevices : OUTPUT_DEVICES_FLAG :  FAIL');
  }
});

AudioRendererFilter⁹⁺

Implements filter criteria. Before calling selectOutputDeviceByFilter, you must obtain an AudioRendererFilter instance.

System API: This is a system API.

Name	Type	Mandatory	Description
uid	number	No	Application ID. System capability: SystemCapability.Multimedia.Audio.Core
rendererInfo	AudioRendererInfo	No	Audio renderer information. System capability: SystemCapability.Multimedia.Audio.Renderer
rendererId	number	No	Unique ID of an audio stream. System capability: SystemCapability.Multimedia.Audio.Renderer

Example

import audio from '@ohos.multimedia.audio';
let outputAudioRendererFilter: audio.AudioRendererFilter = {
  uid : 20010041,
  rendererInfo : {
    content : audio.ContentType.CONTENT_TYPE_MUSIC,
    usage : audio.StreamUsage.STREAM_USAGE_MEDIA,
    rendererFlags : 0
  },
  rendererId : 0
};

AudioRenderer⁸⁺

Provides APIs for audio rendering. Before calling any API in AudioRenderer, you must use createAudioRenderer to create an AudioRenderer instance.

Attributes

System capability: SystemCapability.Multimedia.Audio.Renderer

Name	Type	Readable	Writable	Description
state8+	AudioState	Yes	No	Audio renderer state.

Example

import audio from '@ohos.multimedia.audio';
let state: audio.AudioState = audioRenderer.state;

getRendererInfo⁸⁺

getRendererInfo(callback: AsyncCallback): void

Obtains the renderer information of this AudioRenderer instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<AudioRendererInfo>	Yes	Callback used to return the renderer information.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getRendererInfo((err: BusinessError, rendererInfo: audio.AudioRendererInfo) => {
  console.info('Renderer GetRendererInfo:');
  console.info(`Renderer content: ${rendererInfo.content}`);
  console.info(`Renderer usage: ${rendererInfo.usage}`);
  console.info(`Renderer flags: ${rendererInfo.rendererFlags}`);
});

getRendererInfo⁸⁺

getRendererInfo(): Promise

Obtains the renderer information of this AudioRenderer instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<AudioRendererInfo>	Promise used to return the renderer information.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getRendererInfo().then((rendererInfo: audio.AudioRendererInfo) => {
  console.info('Renderer GetRendererInfo:');
  console.info(`Renderer content: ${rendererInfo.content}`);
  console.info(`Renderer usage: ${rendererInfo.usage}`);
  console.info(`Renderer flags: ${rendererInfo.rendererFlags}`)
}).catch((err: BusinessError) => {
  console.error(`AudioFrameworkRenderLog: RendererInfo :ERROR: ${err}`);
});

getRendererInfoSync¹⁰⁺

getRendererInfoSync(): AudioRendererInfo

Obtains the renderer information of this AudioRenderer instance. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
AudioRendererInfo	Audio renderer information.

Example

import { BusinessError } from '@ohos.base';

try {
  let rendererInfo: audio.AudioRendererInfo = audioRenderer.getRendererInfoSync();
  console.info(`Renderer content: ${rendererInfo.content}`);
  console.info(`Renderer usage: ${rendererInfo.usage}`);
  console.info(`Renderer flags: ${rendererInfo.rendererFlags}`)
} catch (err) {
  let error = err as BusinessError;
  console.error(`AudioFrameworkRenderLog: RendererInfo :ERROR: ${error}`);
}

getStreamInfo⁸⁺

getStreamInfo(callback: AsyncCallback): void

Obtains the stream information of this AudioRenderer instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<AudioStreamInfo>	Yes	Callback used to return the stream information.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getStreamInfo((err: BusinessError, streamInfo: audio.AudioStreamInfo) => {
  console.info('Renderer GetStreamInfo:');
  console.info(`Renderer sampling rate: ${streamInfo.samplingRate}`);
  console.info(`Renderer channel: ${streamInfo.channels}`);
  console.info(`Renderer format: ${streamInfo.sampleFormat}`);
  console.info(`Renderer encoding type: ${streamInfo.encodingType}`);
});

getStreamInfo⁸⁺

getStreamInfo(): Promise

Obtains the stream information of this AudioRenderer instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<AudioStreamInfo>	Promise used to return the stream information.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getStreamInfo().then((streamInfo: audio.AudioStreamInfo) => {
  console.info('Renderer GetStreamInfo:');
  console.info(`Renderer sampling rate: ${streamInfo.samplingRate}`);
  console.info(`Renderer channel: ${streamInfo.channels}`);
  console.info(`Renderer format: ${streamInfo.sampleFormat}`);
  console.info(`Renderer encoding type: ${streamInfo.encodingType}`);
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

getStreamInfoSync¹⁰⁺

getStreamInfoSync(): AudioStreamInfo

Obtains the stream information of this AudioRenderer instance. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
AudioStreamInfo	Stream information.

Example

import { BusinessError } from '@ohos.base';

try {
  let streamInfo: audio.AudioStreamInfo = audioRenderer.getStreamInfoSync();
  console.info(`Renderer sampling rate: ${streamInfo.samplingRate}`);
  console.info(`Renderer channel: ${streamInfo.channels}`);
  console.info(`Renderer format: ${streamInfo.sampleFormat}`);
  console.info(`Renderer encoding type: ${streamInfo.encodingType}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`ERROR: ${error}`);
}

getAudioStreamId⁹⁺

getAudioStreamId(callback: AsyncCallback): void

Obtains the stream ID of this AudioRenderer instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback	Yes	Callback used to return the stream ID.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getAudioStreamId((err: BusinessError, streamid: number) => {
  console.info(`Renderer GetStreamId: ${streamid}`);
});

getAudioStreamId⁹⁺

getAudioStreamId(): Promise

Obtains the stream ID of this AudioRenderer instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise	Promise used to return the stream ID.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getAudioStreamId().then((streamid: number) => {
  console.info(`Renderer getAudioStreamId: ${streamid}`);
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

getAudioStreamIdSync¹⁰⁺

getAudioStreamIdSync(): number

Obtains the stream ID of this AudioRenderer instance. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
number	Stream ID.

Example

import { BusinessError } from '@ohos.base';

try {
  let streamid: number = audioRenderer.getAudioStreamIdSync();
  console.info(`Renderer getAudioStreamIdSync: ${streamid}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`ERROR: ${error}`);
}

setAudioEffectMode¹⁰⁺

setAudioEffectMode(mode: AudioEffectMode, callback: AsyncCallback<void>): void

Sets an audio effect mode. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
mode	AudioEffectMode	Yes	Audio effect mode to set.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by callback.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.setAudioEffectMode(audio.AudioEffectMode.EFFECT_DEFAULT, (err: BusinessError) => {
  if (err) {
    console.error('Failed to set params');
  } else {
    console.info('Callback invoked to indicate a successful audio effect mode setting.');
  }
});

setAudioEffectMode¹⁰⁺

setAudioEffectMode(mode: AudioEffectMode): Promise<void>

Sets an audio effect mode. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
mode	AudioEffectMode	Yes	Audio effect mode to set.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Invalid parameter error. Return by promise.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.setAudioEffectMode(audio.AudioEffectMode.EFFECT_DEFAULT).then(() => {
  console.info('setAudioEffectMode SUCCESS');
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

getAudioEffectMode¹⁰⁺

getAudioEffectMode(callback: AsyncCallback<AudioEffectMode>): void

Obtains the audio effect mode in use. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<AudioEffectMode>	Yes	Callback used to return the audio effect mode.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getAudioEffectMode((err: BusinessError, effectmode: audio.AudioEffectMode) => {
  if (err) {
    console.error('Failed to get params');
  } else {
    console.info(`getAudioEffectMode: ${effectmode}`);
  }
});

getAudioEffectMode¹⁰⁺

getAudioEffectMode(): Promise<AudioEffectMode>

Obtains the audio effect mode in use. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<AudioEffectMode>	Promise used to return the audio effect mode.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getAudioEffectMode().then((effectmode: audio.AudioEffectMode) => {
  console.info(`getAudioEffectMode: ${effectmode}`);
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

start⁸⁺

start(callback: AsyncCallback): void

Starts the renderer. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.start((err: BusinessError) => {
  if (err) {
    console.error('Renderer start failed.');
  } else {
    console.info('Renderer start success.');
  }
});

start⁸⁺

start(): Promise

Starts the renderer. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.start().then(() => {
  console.info('Renderer started');
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

pause⁸⁺

pause(callback: AsyncCallback<void>): void

Pauses rendering. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.pause((err: BusinessError) => {
  if (err) {
    console.error('Renderer pause failed');
  } else {
    console.info('Renderer paused.');
  }
});

pause⁸⁺

pause(): Promise<void>

Pauses rendering. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.pause().then(() => {
  console.info('Renderer paused');
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

drain⁸⁺

drain(callback: AsyncCallback<void>): void

Drains the playback buffer. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.drain((err: BusinessError) => {
  if (err) {
    console.error('Renderer drain failed');
  } else {
    console.info('Renderer drained.');
  }
});

drain⁸⁺

drain(): Promise<void>

Drains the playback buffer. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.drain().then(() => {
  console.info('Renderer drained successfully');
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

stop⁸⁺

stop(callback: AsyncCallback<void>): void

Stops rendering. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.stop((err: BusinessError) => {
  if (err) {
    console.error('Renderer stop failed');
  } else {
    console.info('Renderer stopped.');
  }
});

stop⁸⁺

stop(): Promise<void>

Stops rendering. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.stop().then(() => {
  console.info('Renderer stopped successfully');
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

release⁸⁺

release(callback: AsyncCallback<void>): void

Releases the renderer. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.release((err: BusinessError) => {
  if (err) {
    console.error('Renderer release failed');
  } else {
    console.info('Renderer released.');
  }
});

release⁸⁺

release(): Promise<void>

Releases the renderer. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.release().then(() => {
  console.info('Renderer released successfully');
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

write⁸⁺

write(buffer: ArrayBuffer, callback: AsyncCallback<number>): void

Writes the buffer. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
buffer	ArrayBuffer	Yes	Buffer to be written.
callback	AsyncCallback<number>	Yes	Callback used to return the result. If the operation is successful, the number of bytes written is returned; otherwise, an error code is returned.

Example

import { BusinessError } from '@ohos.base';
let bufferSize: number;
class Options {
  offset?: number;
  length?: number;
}
audioRenderer.getBufferSize().then((data: number)=> {
  console.info(`AudioFrameworkRenderLog: getBufferSize: SUCCESS ${data}`);
  bufferSize = data;
  console.info(`Buffer size: ${bufferSize}`);
  let path = getContext().cacheDir;
  let filePath = path + '/StarWars10s-2C-48000-4SW.wav';
  let file: fs.File = fs.openSync(filePath, fs.OpenMode.READ_ONLY);
  fs.stat(filePath).then(async (stat: fs.Stat) => {
    let buf = new ArrayBuffer(bufferSize);
    let len = stat.size % bufferSize == 0 ? Math.floor(stat.size / bufferSize) : Math.floor(stat.size / bufferSize + 1);
    for (let i = 0;i < len; i++) {
      let options: Options = {
        offset: i * bufferSize,
        length: bufferSize
      }
      let readsize: number = await fs.read(file.fd, buf, options)
      let writeSize: number = await new Promise((resolve,reject)=>{
        audioRenderer.write(buf,(err: BusinessError, writeSize: number)=>{
          if(err){
            reject(err)
          }else{
            resolve(writeSize)
          }
        })
      })
    }
  });
  }).catch((err: BusinessError) => {
    console.error(`AudioFrameworkRenderLog: getBufferSize: ERROR: ${err}`);
});

write⁸⁺

write(buffer: ArrayBuffer): Promise<number>

Writes the buffer. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<number>	Promise used to return the result. If the operation is successful, the number of bytes written is returned; otherwise, an error code is returned.

Example

import { BusinessError } from '@ohos.base';
let bufferSize: number;
class Options {
  offset?: number;
  length?: number;
}
audioRenderer.getBufferSize().then((data: number) => {
  console.info(`AudioFrameworkRenderLog: getBufferSize: SUCCESS ${data}`);
  bufferSize = data;
  console.info(`BufferSize: ${bufferSize}`);
  let path = getContext().cacheDir;
  let filePath = path + '/StarWars10s-2C-48000-4SW.wav';
  let file: fs.File = fs.openSync(filePath, fs.OpenMode.READ_ONLY);
  fs.stat(filePath).then(async (stat: fs.Stat) => {
    let buf = new ArrayBuffer(bufferSize);
    let len = stat.size % bufferSize == 0 ? Math.floor(stat.size / bufferSize) : Math.floor(stat.size / bufferSize + 1);
    for (let i = 0;i < len; i++) {
      let options: Options = {
        offset: i * bufferSize,
        length: bufferSize
      }
      let readsize: number = await fs.read(file.fd, buf, options)
      try{
        let writeSize: number = await audioRenderer.write(buf);
      } catch(err) {
        let error = err as BusinessError;
        console.error(`audioRenderer.write err: ${error}`);
      }
    }
  });
  }).catch((err: BusinessError) => {
    console.info(`AudioFrameworkRenderLog: getBufferSize: ERROR: ${err}`);
});

getAudioTime⁸⁺

getAudioTime(callback: AsyncCallback<number>): void

Obtains the number of nanoseconds elapsed from the Unix epoch (January 1, 1970). This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<number>	Yes	Callback used to return the timestamp.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getAudioTime((err: BusinessError, timestamp: number) => {
  console.info(`Current timestamp: ${timestamp}`);
});

getAudioTime⁸⁺

getAudioTime(): Promise<number>

Obtains the number of nanoseconds elapsed from the Unix epoch (January 1, 1970). This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<number>	Promise used to return the timestamp.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getAudioTime().then((timestamp: number) => {
  console.info(`Current timestamp: ${timestamp}`);
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

getAudioTimeSync¹⁰⁺

getAudioTimeSync(): number

Obtains the number of nanoseconds elapsed from the Unix epoch (January 1, 1970). This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
number	Timestamp.

Example

import { BusinessError } from '@ohos.base';

try {
  let timestamp: number = audioRenderer.getAudioTimeSync();
  console.info(`Current timestamp: ${timestamp}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`ERROR: ${error}`);
}

getBufferSize⁸⁺

getBufferSize(callback: AsyncCallback<number>): void

Obtains a reasonable minimum buffer size in bytes for rendering. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<number>	Yes	Callback used to return the buffer size.

Example

import { BusinessError } from '@ohos.base';
let bufferSize: number;
audioRenderer.getBufferSize((err: BusinessError, data: number) => {
  if (err) {
    console.error('getBufferSize error');
  } else {
    console.info(`AudioFrameworkRenderLog: getBufferSize: SUCCESS ${data}`);
    bufferSize = data;
  }
});

getBufferSize⁸⁺

getBufferSize(): Promise<number>

Obtains a reasonable minimum buffer size in bytes for rendering. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<number>	Promise used to return the buffer size.

Example

import { BusinessError } from '@ohos.base';
let bufferSize: number;
audioRenderer.getBufferSize().then((data: number) => {
  console.info(`AudioFrameworkRenderLog: getBufferSize: SUCCESS ${data}`);
  bufferSize = data;
}).catch((err: BusinessError) => {
  console.error(`AudioFrameworkRenderLog: getBufferSize: ERROR: ${err}`);
});

getBufferSizeSync¹⁰⁺

getBufferSizeSync(): number

Obtains a reasonable minimum buffer size in bytes for rendering. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
number	Buffer size.

Example

import { BusinessError } from '@ohos.base';

let bufferSize: number = 0;
try {
  bufferSize = audioRenderer.getBufferSizeSync();
  console.info(`AudioFrameworkRenderLog: getBufferSize: SUCCESS ${bufferSize}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`AudioFrameworkRenderLog: getBufferSize: ERROR: ${error}`);
}

setRenderRate⁸⁺

setRenderRate(rate: AudioRendererRate, callback: AsyncCallback<void>): void

Sets the render rate. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
rate	AudioRendererRate	Yes	Audio render rate.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.setRenderRate(audio.AudioRendererRate.RENDER_RATE_NORMAL, (err: BusinessError) => {
  if (err) {
    console.error('Failed to set params');
  } else {
    console.info('Callback invoked to indicate a successful render rate setting.');
  }
});

setRenderRate⁸⁺

setRenderRate(rate: AudioRendererRate): Promise<void>

Sets the render rate. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
rate	AudioRendererRate	Yes	Audio render rate.

Return value

Type	Description
Promise<void>	Promise used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.setRenderRate(audio.AudioRendererRate.RENDER_RATE_NORMAL).then(() => {
  console.info('setRenderRate SUCCESS');
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

getRenderRate⁸⁺

getRenderRate(callback: AsyncCallback<AudioRendererRate>): void

Obtains the current render rate. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<AudioRendererRate>	Yes	Callback used to return the audio render rate.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getRenderRate((err: BusinessError, renderrate: audio.AudioRendererRate) => {
  console.info(`getRenderRate: ${renderrate}`);
});

getRenderRate⁸⁺

getRenderRate(): Promise<AudioRendererRate>

Obtains the current render rate. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<AudioRendererRate>	Promise used to return the audio render rate.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getRenderRate().then((renderRate: audio.AudioRendererRate) => {
  console.info(`getRenderRate: ${renderRate}`);
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

getRenderRateSync¹⁰⁺

getRenderRateSync(): AudioRendererRate

Obtains the current render rate. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
AudioRendererRate	Audio render rate.

Example

import { BusinessError } from '@ohos.base';

try {
  let renderRate: audio.AudioRendererRate = audioRenderer.getRenderRateSync();
  console.info(`getRenderRate: ${renderRate}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`ERROR: ${error}`);
}

setInterruptMode⁹⁺

setInterruptMode(mode: InterruptMode): Promise&lt;void&gt;

Sets the audio interruption mode for the application. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Interrupt

Parameters

Name	Type	Mandatory	Description
mode	InterruptMode	Yes	Audio interruption mode.

Return value

Type	Description
Promise<void>	Promise used to return the result. If the operation is successful, undefined is returned. Otherwise, error is returned.

Example

import { BusinessError } from '@ohos.base';
let mode = 0;
audioRenderer.setInterruptMode(mode).then(() => {
  console.info('setInterruptMode Success!');
}).catch((err: BusinessError) => {
  console.error(`setInterruptMode Fail: ${err}`);
});

setInterruptMode⁹⁺

setInterruptMode(mode: InterruptMode, callback: AsyncCallback<void>): void

Sets the audio interruption mode for the application. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Interrupt

Parameters

Name	Type	Mandatory	Description
mode	InterruptMode	Yes	Audio interruption mode.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
let mode = 1;
audioRenderer.setInterruptMode(mode, (err: BusinessError) => {
  if(err){
    console.error(`setInterruptMode Fail: ${err}`);
  }
  console.info('setInterruptMode Success!');
});

setInterruptModeSync¹⁰⁺

setInterruptModeSync(mode: InterruptMode): void

Sets the audio interruption mode for the application. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Interrupt

Parameters

Name	Type	Mandatory	Description
mode	InterruptMode	Yes	Audio interruption mode.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	invalid parameter error

Example

import { BusinessError } from '@ohos.base';

try {
  audioRenderer.setInterruptModeSync(0);
  console.info('setInterruptMode Success!');
} catch (err) {
  let error = err as BusinessError;
  console.error(`setInterruptMode Fail: ${error}`);
}

setVolume⁹⁺

setVolume(volume: number): Promise&lt;void&gt;

Sets the volume for the application. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
volume	number	Yes	Volume to set, which can be within the range from 0.0 to 1.0.

Return value

Type	Description
Promise<void>	Promise used to return the result. If the operation is successful, undefined is returned. Otherwise, error is returned.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.setVolume(0.5).then(() => {
  console.info('setVolume Success!');
}).catch((err: BusinessError) => {
  console.error(`setVolume Fail: ${err}`);
});

setVolume⁹⁺

setVolume(volume: number, callback: AsyncCallback<void>): void

Sets the volume for the application. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
volume	number	Yes	Volume to set, which can be within the range from 0.0 to 1.0.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.setVolume(0.5, (err: BusinessError) => {
  if(err){
    console.error(`setVolume Fail: ${err}`);
  }
  console.info('setVolume Success!');
});

getMinStreamVolume¹⁰⁺

getMinStreamVolume(callback: AsyncCallback&lt;number&gt;): void

Obtains the minimum volume of the application from the perspective of an audio stream. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<number>	Yes	Callback used to return the minimum volume, ranging from 0 to 1.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getMinStreamVolume((err: BusinessError, minVolume: number) => {
  if (err) {
    console.error(`getMinStreamVolume error: ${err}`);
  } else {
    console.info(`getMinStreamVolume Success! ${minVolume}`);
  }
});

getMinStreamVolume¹⁰⁺

getMinStreamVolume(): Promise&lt;number&gt;

Obtains the minimum volume of the application from the perspective of an audio stream. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<number>	Promise used to return the minimum volume, ranging from 0 to 1.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getMinStreamVolume().then((value: number) => {
  console.info(`Get min stream volume Success! ${value}`);
}).catch((err: BusinessError) => {
  console.error(`Get min stream volume Fail: ${err}`);
});

getMinStreamVolumeSync¹⁰⁺

getMinStreamVolumeSync(): number

Obtains the minimum volume of the application from the perspective of an audio stream. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
number	Minimum volume, ranging from 0 to 1.

Example

import { BusinessError } from '@ohos.base';

try {
  let value: number = audioRenderer.getMinStreamVolumeSync();
  console.info(`Get min stream volume Success! ${value}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Get min stream volume Fail: ${error}`);
}

getMaxStreamVolume¹⁰⁺

getMaxStreamVolume(callback: AsyncCallback&lt;number&gt;): void

Obtains the maximum volume of the application from the perspective of an audio stream. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<number>	Yes	Callback used to return the maximum volume, ranging from 0 to 1.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getMaxStreamVolume((err: BusinessError, maxVolume: number) => {
  if (err) {
    console.error(`getMaxStreamVolume Fail: ${err}`);
  } else {
    console.info(`getMaxStreamVolume Success! ${maxVolume}`);
  }
});

getMaxStreamVolume¹⁰⁺

getMaxStreamVolume(): Promise&lt;number&gt;

Obtains the maximum volume of the application from the perspective of an audio stream. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<number>	Promise used to return the maximum volume, ranging from 0 to 1.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getMaxStreamVolume().then((value: number) => {
  console.info(`Get max stream volume Success! ${value}`);
}).catch((err: BusinessError) => {
  console.error(`Get max stream volume Fail: ${err}`);
});

getMaxStreamVolumeSync¹⁰⁺

getMaxStreamVolumeSync(): number

Obtains the maximum volume of the application from the perspective of an audio stream. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
number	Maximum volume, ranging from 0 to 1.

Example

import { BusinessError } from '@ohos.base';

try {
  let value: number = audioRenderer.getMaxStreamVolumeSync();
  console.info(`Get max stream volume Success! ${value}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Get max stream volume Fail: ${error}`);
}

getUnderflowCount¹⁰⁺

getUnderflowCount(callback: AsyncCallback&lt;number&gt;): void

Obtains the number of underflow audio frames in the audio stream that is being played. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<number>	Yes	Callback used to return the number of underflow audio frames.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getUnderflowCount((err: BusinessError, underflowCount: number) => {
  if (err) {
    console.error(`getUnderflowCount Fail: ${err}`);
  } else {
    console.info(`getUnderflowCount Success! ${underflowCount}`);
  }
});

getUnderflowCount¹⁰⁺

getUnderflowCount(): Promise&lt;number&gt;

Obtains the number of underflow audio frames in the audio stream that is being played. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
Promise<number>	Promise used to return the number of underflow audio frames.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getUnderflowCount().then((value: number) => {
  console.info(`Get underflow count Success! ${value}`);
}).catch((err: BusinessError) => {
  console.error(`Get underflow count Fail: ${err}`);
});

getUnderflowCountSync¹⁰⁺

getUnderflowCountSync(): number

Obtains the number of underflow audio frames in the audio stream that is being played. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Return value

Type	Description
number	Number of underflow audio frames.

Example

import { BusinessError } from '@ohos.base';

try {
  let value: number = audioRenderer.getUnderflowCountSync();
  console.info(`Get underflow count Success! ${value}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`Get underflow count Fail: ${error}`);
}

getCurrentOutputDevices¹⁰⁺

getCurrentOutputDevices(callback: AsyncCallback&lt;AudioDeviceDescriptors&gt;): void

Obtains the output device descriptors of the audio streams. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<AudioDeviceDescriptors>	Yes	Callback used to return the output device descriptors.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getCurrentOutputDevices((err: BusinessError, deviceInfo: audio.AudioDeviceDescriptors) => {
  if (err) {
    console.error(`getCurrentOutputDevices Fail: ${err}`);
  } else {
    for (let i = 0; i < deviceInfo.length; i++) {
      console.info(`DeviceInfo id: ${deviceInfo[i].id}`);
      console.info(`DeviceInfo type: ${deviceInfo[i].deviceType}`);
      console.info(`DeviceInfo role: ${deviceInfo[i].deviceRole}`);
      console.info(`DeviceInfo name: ${deviceInfo[i].name}`);
      console.info(`DeviceInfo address: ${deviceInfo[i].address}`);
      console.info(`DeviceInfo samplerate: ${deviceInfo[i].sampleRates[0]}`);
      console.info(`DeviceInfo channelcount: ${deviceInfo[i].channelCounts[0]}`);
      console.info(`DeviceInfo channelmask: ${deviceInfo[i].channelMasks[0]}`);
    }
  }
});

getCurrentOutputDevices¹⁰⁺

getCurrentOutputDevices(): Promise&lt;AudioDeviceDescriptors&gt;

Obtains the output device descriptors of the audio streams. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Device

Return value

Type	Description
Promise<AudioDeviceDescriptors>	Promise used to return the output device descriptors.

Example

import { BusinessError } from '@ohos.base';
audioRenderer.getCurrentOutputDevices().then((deviceInfo: audio.AudioDeviceDescriptors) => {
  for (let i = 0; i < deviceInfo.length; i++) {
    console.info(`DeviceInfo id: ${deviceInfo[i].id}`);
    console.info(`DeviceInfo type: ${deviceInfo[i].deviceType}`);
    console.info(`DeviceInfo role: ${deviceInfo[i].deviceRole}`);
    console.info(`DeviceInfo name: ${deviceInfo[i].name}`);
    console.info(`DeviceInfo address: ${deviceInfo[i].address}`);
    console.info(`DeviceInfo samplerate: ${deviceInfo[i].sampleRates[0]}`);
    console.info(`DeviceInfo channelcount: ${deviceInfo[i].channelCounts[0]}`);
    console.info(`DeviceInfo channelmask: ${deviceInfo[i].channelMasks[0]}`);
  }
}).catch((err: BusinessError) => {
  console.error(`Get current output devices Fail: ${err}`);
});

getCurrentOutputDevicesSync¹⁰⁺

getCurrentOutputDevicesSync(): AudioDeviceDescriptors

Obtains the output device descriptors of the audio streams. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Device

Return value

Type	Description
AudioDeviceDescriptors	Output device descriptors.

Example

import { BusinessError } from '@ohos.base';

try {
  let deviceInfo: audio.AudioDeviceDescriptors = audioRenderer.getCurrentOutputDevicesSync();
  for (let i = 0; i < deviceInfo.length; i++) {
    console.info(`DeviceInfo id: ${deviceInfo[i].id}`);
    console.info(`DeviceInfo type: ${deviceInfo[i].deviceType}`);
    console.info(`DeviceInfo role: ${deviceInfo[i].deviceRole}`);
    console.info(`DeviceInfo name: ${deviceInfo[i].name}`);
    console.info(`DeviceInfo address: ${deviceInfo[i].address}`);
    console.info(`DeviceInfo samplerate: ${deviceInfo[i].sampleRates[0]}`);
    console.info(`DeviceInfo channelcount: ${deviceInfo[i].channelCounts[0]}`);
    console.info(`DeviceInfo channelmask: ${deviceInfo[i].channelMasks[0]}`);
  }
} catch (err) {
  let error = err as BusinessError;
  console.error(`Get current output devices Fail: ${error}`);
}

setChannelBlendMode¹¹⁺

setChannelBlendMode(mode: ChannelBlendMode): void

Sets the audio channel blending mode. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
mode	ChannelBlendMode	Yes	Audio channel blending mode.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	Input parameter value error.
6800103	Operation not permit at current state.

Example

let mode = audio.ChannelBlendMode.MODE_DEFAULT;

audioRenderer.setChannelBlendMode(mode);
console.info(`BlendMode: ${mode}`);

on(‘audioInterrupt’)⁹⁺

on(type: ‘audioInterrupt’, callback: Callback<InterruptEvent>): void

Subscribes to audio interruption events. This API uses a callback to obtain interrupt events.

Same as on(‘interrupt’), this API is used to listen for focus changes. The AudioRenderer instance proactively gains the focus when the start event occurs and releases the focus when the pause or stop event occurs. Therefore, you do not need to request to gain or release the focus.

System capability: SystemCapability.Multimedia.Audio.Interrupt

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘audioInterrupt’ is triggered when audio rendering is interrupted.
callback	Callback<InterruptEvent>	Yes	Callback used to return the audio interruption event.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

import audio from '@ohos.multimedia.audio';

let isPlaying: boolean; // An identifier specifying whether rendering is in progress.
let isDucked: boolean; // An identifier specifying whether the audio volume is reduced.
onAudioInterrupt();

async function onAudioInterrupt(){
  audioRenderer.on('audioInterrupt', (interruptEvent: audio.InterruptEvent) => {
    if (interruptEvent.forceType == audio.InterruptForceType.INTERRUPT_FORCE) {
      // The system forcibly interrupts audio rendering. The application must update the status and displayed content accordingly.
      switch (interruptEvent.hintType) {
        case audio.InterruptHint.INTERRUPT_HINT_PAUSE:
          // The audio stream has been paused and temporarily loses the focus. It will receive the interruptEvent corresponding to resume when it is able to regain the focus.
          console.info('Force paused. Update playing status and stop writing');
          isPlaying = false; // A simplified processing indicating several operations for switching the application to the paused state.
          break;
        case audio.InterruptHint.INTERRUPT_HINT_STOP:
          // The audio stream has been stopped and permanently loses the focus. The user must manually trigger the operation to resume rendering.
          console.info('Force stopped. Update playing status and stop writing');
          isPlaying = false; // A simplified processing indicating several operations for switching the application to the paused state.
          break;
        case audio.InterruptHint.INTERRUPT_HINT_DUCK:
          // The audio stream is rendered at a reduced volume.
          console.info('Force ducked. Update volume status');
          isDucked = true; // A simplified processing indicating several operations for updating the volume status.
          break;
        case audio.InterruptHint.INTERRUPT_HINT_UNDUCK:
          // The audio stream is rendered at the normal volume.
          console.info('Force ducked. Update volume status');
          isDucked = false; // A simplified processing indicating several operations for updating the volume status.
          break;
        default:
          console.info('Invalid interruptEvent');
          break;
      }
    } else if (interruptEvent.forceType == audio.InterruptForceType.INTERRUPT_SHARE) {
      // The application can choose to take action or ignore.
      switch (interruptEvent.hintType) {
        case audio.InterruptHint.INTERRUPT_HINT_RESUME:
          // It is recommended that the application continue rendering. (The audio stream has been forcibly paused and temporarily lost the focus. It can resume rendering now.)
          console.info('Resume force paused renderer or ignore');
          // To continue rendering, the application must perform the required operations.
          break;
        case audio.InterruptHint.INTERRUPT_HINT_PAUSE:
          // It is recommended that the application pause rendering.
          console.info('Choose to pause or ignore');
          // To pause rendering, the application must perform the required operations.
          break;
        case audio.InterruptHint.INTERRUPT_HINT_STOP:
          // It is recommended that the application stop rendering.
          console.info('Choose to stop or ignore');
          // To stop rendering, the application must perform the required operations.
          break;
        case audio.InterruptHint.INTERRUPT_HINT_DUCK:
          // It is recommended that the application reduce the volume for rendering.
          console.info('Choose to duck or ignore');
          // To decrease the volume for rendering, the application must perform the required operations.
          break;
        case audio.InterruptHint.INTERRUPT_HINT_UNDUCK:
          // It is recommended that the application resume rendering at the normal volume.
          console.info('Choose to unduck or ignore');
          // To resume rendering at the normal volume, the application must perform the required operations.
          break;
        default:
          break;
      }
    }
  });
}

on(‘markReach’)⁸⁺

on(type: ‘markReach’, frame: number, callback: Callback&lt;number&gt;): void

Subscribes to mark reached events. When the number of frames rendered reaches the value of the frame parameter, a callback is invoked.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is fixed at ‘markReach’.
frame	number	Yes	Number of frames to trigger the event. The value must be greater than 0.
callback	Callback<number>	Yes	Callback invoked when the event is triggered.

Example

audioRenderer.on('markReach', 1000, (position: number) => {
  if (position == 1000) {
    console.info('ON Triggered successfully');
  }
});

off(‘markReach’) ⁸⁺

off(type: ‘markReach’): void

Unsubscribes from mark reached events.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is fixed at ‘markReach’.

Example

audioRenderer.off('markReach');

on(‘periodReach’) ⁸⁺

on(type: ‘periodReach’, frame: number, callback: Callback&lt;number&gt;): void

Subscribes to period reached events. When the number of frames rendered reaches the value of the frame parameter, a callback is triggered and the specified value is returned.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is fixed at ‘periodReach’.
frame	number	Yes	Number of frames to trigger the event. The value must be greater than 0.
callback	Callback<number>	Yes	Callback invoked when the event is triggered.

Example

audioRenderer.on('periodReach', 1000, (position: number) => {
  if (position == 1000) {
    console.info('ON Triggered successfully');
  }
});

off(‘periodReach’) ⁸⁺

off(type: ‘periodReach’): void

Unsubscribes from period reached events.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is fixed at ‘periodReach’.

Example

audioRenderer.off('periodReach')

on(‘stateChange’)⁸⁺

on(type: ‘stateChange’, callback: Callback): void

Subscribes to state change events.

System capability: SystemCapability.Multimedia.Audio.Renderer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value stateChange means the state change event.
callback	Callback<AudioState>	Yes	Callback used to return the state change.

Example

audioRenderer.on('stateChange', (state: audio.AudioState) => {
  if (state == 1) {
    console.info('audio renderer state is: STATE_PREPARED');
  }
  if (state == 2) {
    console.info('audio renderer state is: STATE_RUNNING');
  }
});

on(‘outputDeviceChange’) ¹⁰⁺

on(type: ‘outputDeviceChange’, callback: Callback<AudioDeviceDescriptors>): void;

Subscribes to audio output device change events.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘outputDeviceChange’ is triggered when the audio output device is changed.
callback	Callback<AudioDeviceDescriptors>	Yes	Callback used to return the audio output device change.

Error codes

ID	Error Message
6800101	if input parameter value error.

Example

audioRenderer.on('outputDeviceChange', (deviceInfo: audio.AudioDeviceDescriptors) => {
  console.info(`DeviceInfo id: ${deviceInfo[0].id}`);
  console.info(`DeviceInfo name: ${deviceInfo[0].name}`);
  console.info(`DeviceInfo address: ${deviceInfo[0].address}`);
});

off(‘outputDeviceChange’) ¹⁰⁺

off(type: ‘outputDeviceChange’, callback?: Callback<AudioDeviceDescriptors>): void;

Unsubscribes from audio output device change events.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘outputDeviceChange’ is triggered when the audio output device is changed.
callback	Callback<AudioDeviceDescriptors>	No	Callback used for unsubscription.

Error codes

ID	Error Message
6800101	if input parameter value error.

Example

audioRenderer.off('outputDeviceChange', (deviceInfo: audio.AudioDeviceDescriptors) => {
  console.info(`DeviceInfo id: ${deviceInfo[0].id}`);
  console.info(`DeviceInfo name: ${deviceInfo[0].name}`);
  console.info(`DeviceInfo address: ${deviceInfo[0].address}`);
});

AudioCapturer⁸⁺

Provides APIs for audio capture. Before calling any API in AudioCapturer, you must use createAudioCapturer to create an AudioCapturer instance.

Attributes

System capability: SystemCapability.Multimedia.Audio.Capturer

Name	Type	Readable	Writable	Description
state8+	AudioState	Yes	No	Audio capturer state.

Example

import audio from '@ohos.multimedia.audio';
let state: audio.AudioState = audioCapturer.state;

getCapturerInfo⁸⁺

getCapturerInfo(callback: AsyncCallback): void

Obtains the capturer information of this AudioCapturer instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback	Yes	Callback used to return the capturer information.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.getCapturerInfo((err: BusinessError, capturerInfo: audio.AudioCapturerInfo) => {
  if (err) {
    console.error('Failed to get capture info');
  } else {
    console.info('Capturer getCapturerInfo:');
    console.info(`Capturer source: ${capturerInfo.source}`);
    console.info(`Capturer flags: ${capturerInfo.capturerFlags}`);
  }
});

getCapturerInfo⁸⁺

getCapturerInfo(): Promise

Obtains the capturer information of this AudioCapturer instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
Promise<AudioCapturerInfo>	Promise used to return the capturer information.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.getCapturerInfo().then((audioParamsGet: audio.AudioCapturerInfo) => {
  if (audioParamsGet != undefined) {
    console.info('AudioFrameworkRecLog: Capturer CapturerInfo:');
    console.info(`AudioFrameworkRecLog: Capturer SourceType: ${audioParamsGet.source}`);
    console.info(`AudioFrameworkRecLog: Capturer capturerFlags: ${audioParamsGet.capturerFlags}`);
  } else {
    console.info(`AudioFrameworkRecLog: audioParamsGet is : ${audioParamsGet}`);
    console.info('AudioFrameworkRecLog: audioParams getCapturerInfo are incorrect');
  }
}).catch((err: BusinessError) => {
  console.error(`AudioFrameworkRecLog: CapturerInfo :ERROR: ${err}`);
})

getCapturerInfoSync¹⁰⁺

getCapturerInfoSync(): AudioCapturerInfo

Obtains the capturer information of this AudioCapturer instance. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
AudioCapturerInfo	Capturer information.

Example

import { BusinessError } from '@ohos.base';

try {
  let audioParamsGet: audio.AudioCapturerInfo = audioCapturer.getCapturerInfoSync();
  console.info(`AudioFrameworkRecLog: Capturer SourceType: ${audioParamsGet.source}`);
  console.info(`AudioFrameworkRecLog: Capturer capturerFlags: ${audioParamsGet.capturerFlags}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`AudioFrameworkRecLog: CapturerInfo :ERROR: ${error}`);
}

getStreamInfo⁸⁺

getStreamInfo(callback: AsyncCallback): void

Obtains the stream information of this AudioCapturer instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<AudioStreamInfo>	Yes	Callback used to return the stream information.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.getStreamInfo((err: BusinessError, streamInfo: audio.AudioStreamInfo) => {
  if (err) {
    console.error('Failed to get stream info');
  } else {
    console.info('Capturer GetStreamInfo:');
    console.info(`Capturer sampling rate: ${streamInfo.samplingRate}`);
    console.info(`Capturer channel: ${streamInfo.channels}`);
    console.info(`Capturer format: ${streamInfo.sampleFormat}`);
    console.info(`Capturer encoding type: ${streamInfo.encodingType}`);
  }
});

getStreamInfo⁸⁺

getStreamInfo(): Promise

Obtains the stream information of this AudioCapturer instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
Promise<AudioStreamInfo>	Promise used to return the stream information.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.getStreamInfo().then((audioParamsGet: audio.AudioStreamInfo) => {
  console.info('getStreamInfo:');
  console.info(`sampleFormat: ${audioParamsGet.sampleFormat}`);
  console.info(`samplingRate: ${audioParamsGet.samplingRate}`);
  console.info(`channels: ${audioParamsGet.channels}`);
  console.info(`encodingType: ${audioParamsGet.encodingType}`);
}).catch((err: BusinessError) => {
  console.error(`getStreamInfo :ERROR: ${err}`);
});

getStreamInfoSync¹⁰⁺

getStreamInfoSync(): AudioStreamInfo

Obtains the stream information of this AudioCapturer instance. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
AudioStreamInfo	Stream information.

Example

import { BusinessError } from '@ohos.base';

try {
  let audioParamsGet: audio.AudioStreamInfo = audioCapturer.getStreamInfoSync();
  console.info(`sampleFormat: ${audioParamsGet.sampleFormat}`);
  console.info(`samplingRate: ${audioParamsGet.samplingRate}`);
  console.info(`channels: ${audioParamsGet.channels}`);
  console.info(`encodingType: ${audioParamsGet.encodingType}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`getStreamInfo :ERROR: ${error}`);
}

getAudioStreamId⁹⁺

getAudioStreamId(callback: AsyncCallback): void

Obtains the stream ID of this AudioCapturer instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback	Yes	Callback used to return the stream ID.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.getAudioStreamId((err: BusinessError, streamid: number) => {
  console.info(`audioCapturer GetStreamId: ${streamid}`);
});

getAudioStreamId⁹⁺

getAudioStreamId(): Promise

Obtains the stream ID of this AudioCapturer instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
Promise	Promise used to return the stream ID.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.getAudioStreamId().then((streamid: number) => {
  console.info(`audioCapturer getAudioStreamId: ${streamid}`);
}).catch((err: BusinessError) => {
  console.error(`ERROR: ${err}`);
});

getAudioStreamIdSync¹⁰⁺

getAudioStreamIdSync(): number

Obtains the stream ID of this AudioCapturer instance. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
number	Stream ID.

Example

import { BusinessError } from '@ohos.base';

try {
  let streamid: number = audioCapturer.getAudioStreamIdSync();
  console.info(`audioCapturer getAudioStreamIdSync: ${streamid}`);
} catch (err) {
  let error = err as BusinessError;
  console.error(`ERROR: ${error}`);
}

start⁸⁺

start(callback: AsyncCallback): void

Starts capturing. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.start((err: BusinessError) => {
  if (err) {
    console.error('Capturer start failed.');
  } else {
    console.info('Capturer start success.');
  }
});

start⁸⁺

start(): Promise

Starts capturing. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
Promise	Promise used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.start().then(() => {
  console.info('AudioFrameworkRecLog: ---------START---------');
  console.info('AudioFrameworkRecLog: Capturer started: SUCCESS');
  console.info(`AudioFrameworkRecLog: AudioCapturer: STATE: ${audioCapturer.state}`);
  console.info('AudioFrameworkRecLog: Capturer started: SUCCESS');
  if ((audioCapturer.state == audio.AudioState.STATE_RUNNING)) {
    console.info('AudioFrameworkRecLog: AudioCapturer is in Running State');
  }
}).catch((err: BusinessError) => {
  console.info(`AudioFrameworkRecLog: Capturer start :ERROR : ${err}`);
});

stop⁸⁺

stop(callback: AsyncCallback): void

Stops capturing. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.stop((err: BusinessError) => {
  if (err) {
    console.error('Capturer stop failed');
  } else {
    console.info('Capturer stopped.');
  }
});

stop⁸⁺

stop(): Promise

Stops capturing. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
Promise	Promise used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.stop().then(() => {
  console.info('AudioFrameworkRecLog: ---------STOP RECORD---------');
  console.info('AudioFrameworkRecLog: Capturer stopped: SUCCESS');
  if ((audioCapturer.state == audio.AudioState.STATE_STOPPED)){
    console.info('AudioFrameworkRecLog: State is Stopped:');
  }
}).catch((err: BusinessError) => {
  console.info(`AudioFrameworkRecLog: Capturer stop: ERROR: ${err}`);
});

release⁸⁺

release(callback: AsyncCallback): void

Releases this AudioCapturer instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.release((err: BusinessError) => {
  if (err) {
    console.error('capturer release failed');
  } else {
    console.info('capturer released.');
  }
});

release⁸⁺

release(): Promise

Releases this AudioCapturer instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
Promise	Promise used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.release().then(() => {
  console.info('AudioFrameworkRecLog: ---------RELEASE RECORD---------');
  console.info('AudioFrameworkRecLog: Capturer release : SUCCESS');
  console.info(`AudioFrameworkRecLog: AudioCapturer : STATE : ${audioCapturer.state}`);
}).catch((err: BusinessError) => {
  console.info(`AudioFrameworkRecLog: Capturer stop: ERROR: ${err}`);
});

read⁸⁺

read(size: number, isBlockingRead: boolean, callback: AsyncCallback): void

Reads the buffer. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
size	number	Yes	Number of bytes to read.
isBlockingRead	boolean	Yes	Whether to block the read operation.
callback	AsyncCallback	Yes	Callback used to return the buffer.

Example

import { BusinessError } from '@ohos.base';
let bufferSize: number = 0;
audioCapturer.getBufferSize().then((data: number) => {
  console.info(`AudioFrameworkRecLog: getBufferSize: SUCCESS ${data}`);
  bufferSize = data;
}).catch((err: BusinessError) => {
  console.error(`AudioFrameworkRecLog: getBufferSize: ERROR: ${err}`);
});
audioCapturer.read(bufferSize, true, (err: BusinessError, buffer: number) => {
  if (!err) {
    console.info('Success in reading the buffer data');
  }
});

read⁸⁺

read(size: number, isBlockingRead: boolean): Promise

Reads the buffer. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
size	number	Yes	Number of bytes to read.
isBlockingRead	boolean	Yes	Whether to block the read operation.

Return value

Type	Description
Promise	Promise used to return the result. If the operation is successful, the buffer data read is returned; otherwise, an error code is returned.

Example

import { BusinessError } from '@ohos.base';
let bufferSize: number = 0;
audioCapturer.getBufferSize().then((data: number) => {
  console.info(`AudioFrameworkRecLog: getBufferSize: SUCCESS ${data}`);
  bufferSize = data;
}).catch((err: BusinessError) => {
  console.info(`AudioFrameworkRecLog: getBufferSize: ERROR ${err}`);
});
console.info(`Buffer size: ${bufferSize}`);
audioCapturer.read(bufferSize, true).then((buffer: number) => {
  console.info('buffer read successfully');
}).catch((err: BusinessError) => {
  console.info(`ERROR : ${err}`);
});

getAudioTime⁸⁺

getAudioTime(callback: AsyncCallback): void

Obtains the number of nanoseconds elapsed from the Unix epoch (January 1, 1970). This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.getAudioTime((err: BusinessError, timestamp: number) => {
  console.info(`Current timestamp: ${timestamp}`);
});

getAudioTime⁸⁺

getAudioTime(): Promise

Obtains the number of nanoseconds elapsed from the Unix epoch (January 1, 1970). This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
Promise	Promise used to return the timestamp.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.getAudioTime().then((audioTime: number) => {
  console.info(`AudioFrameworkRecLog: AudioCapturer getAudioTime : Success ${audioTime}`);
}).catch((err: BusinessError) => {
  console.info(`AudioFrameworkRecLog: AudioCapturer Created : ERROR : ${err}`);
});

getAudioTimeSync¹⁰⁺

getAudioTimeSync(): number

Obtains the number of nanoseconds elapsed from the Unix epoch (January 1, 1970). This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
number	Timestamp.

Example

import { BusinessError } from '@ohos.base';

try {
  let audioTime: number = audioCapturer.getAudioTimeSync();
  console.info(`AudioFrameworkRecLog: AudioCapturer getAudioTimeSync : Success ${audioTime}`);
} catch (err) {
  let error = err as BusinessError;
  console.info(`AudioFrameworkRecLog: AudioCapturer getAudioTimeSync : ERROR : ${error}`);
}

getBufferSize⁸⁺

getBufferSize(callback: AsyncCallback): void

Obtains a reasonable minimum buffer size in bytes for capturing. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback	Yes	Callback used to return the buffer size.

Example

import { BusinessError } from '@ohos.base';
audioCapturer.getBufferSize((err: BusinessError, bufferSize: number) => {
  if (!err) {
    console.info(`BufferSize : ${bufferSize}`);
    audioCapturer.read(bufferSize, true).then((buffer: number) => {
      console.info(`Buffer read is ${buffer}`);
    }).catch((err: BusinessError) => {
      console.error(`AudioFrameworkRecLog: AudioCapturer Created : ERROR : ${err}`);
    });
  }
});

getBufferSize⁸⁺

getBufferSize(): Promise

Obtains a reasonable minimum buffer size in bytes for capturing. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
Promise	Promise used to return the buffer size.

Example

import { BusinessError } from '@ohos.base';
let bufferSize: number = 0;
audioCapturer.getBufferSize().then((data: number) => {
  console.info(`AudioFrameworkRecLog: getBufferSize :SUCCESS ${data}`);
  bufferSize = data;
}).catch((err: BusinessError) => {
  console.info(`AudioFrameworkRecLog: getBufferSize :ERROR : ${err}`);
});

getBufferSizeSync¹⁰⁺

getBufferSizeSync(): number

Obtains a reasonable minimum buffer size in bytes for capturing. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Capturer

Return value

Type	Description
number	Buffer size.

Example

import { BusinessError } from '@ohos.base';

let bufferSize: number = 0;
try {
  bufferSize = audioCapturer.getBufferSizeSync();
  console.info(`AudioFrameworkRecLog: getBufferSizeSync :SUCCESS ${bufferSize}`);
} catch (err) {
  let error = err as BusinessError;
  console.info(`AudioFrameworkRecLog: getBufferSizeSync :ERROR : ${error}`);
}

getCurrentInputDevices¹¹⁺

getCurrentInputDevices(): AudioDeviceDescriptors

Obtains the descriptors of the current input devices. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Device

Return value

Type	Description
AudioDeviceDescriptors	An array of the audio device descriptors.

Example

let deviceDescriptors: audio.AudioDeviceDescriptors = audioCapturer.getCurrentInputDevices();
console.info(`Device id: ${deviceDescriptors[0].id}`);
console.info(`Device type: ${deviceDescriptors[0].deviceType}`);
console.info(`Device role: ${deviceDescriptors[0].deviceRole}`);
console.info(`Device name: ${deviceDescriptors[0].name}`);
console.info(`Device address: ${deviceDescriptors[0].address}`);
console.info(`Device samplerates: ${deviceDescriptors[0].sampleRates[0]}`);
console.info(`Device channelcounts: ${deviceDescriptors[0].channelCounts[0]}`);
console.info(`Device channelmask: ${deviceDescriptors[0].channelMasks[0]}`);
console.info(`Device encodingTypes: ${deviceDescriptors[0].encodingTypes[0]}`);

getCurrentAudioCapturerChangeInfo¹¹⁺

getCurrentAudioCapturerChangeInfo(): AudioCapturerChangeInfo

Obtains the configuration changes of the current audio capturer. This API returns the result synchronously.

System capability: SystemCapability.Multimedia.Audio.Device

Return value

Type	Description
AudioCapturerChangeInfo	Configuration changes of the audio capturer.

Example

let info: audio.AudioCapturerChangeInfo = audioCapturer.getCurrentAudioCapturerChangeInfo();
console.info(`Info streamId: ${info.streamId}`);
console.info(`Info source: ${info.capturerInfo.source}`);
console.info(`Info capturerFlags: ${info.capturerInfo.capturerFlags}`);
console.info(`Info capturerState: ${info.capturerState}`);
console.info(`Info muted: ${info.muted}`);
console.info(`Info type: ${info.deviceDescriptors[0].deviceType}`);
console.info(`Info role: ${info.deviceDescriptors[0].deviceRole}`);
console.info(`Info name: ${info.deviceDescriptors[0].name}`);
console.info(`Info address: ${info.deviceDescriptors[0].address}`);
console.info(`Info samplerates: ${info.deviceDescriptors[0].sampleRates[0]}`);
console.info(`Info channelcounts: ${info.deviceDescriptors[0].channelCounts[0]}`);
console.info(`Info channelmask: ${info.deviceDescriptors[0].channelMasks[0]}`);
console.info(`Info encodingTypes: ${info.deviceDescriptors[0].encodingTypes[0]}`);

on(‘audioInterrupt’)¹⁰⁺

on(type: ‘audioInterrupt’, callback: Callback<InterruptEvent>): void

Subscribes to audio interruption events. This API uses a callback to obtain interrupt events.

Same as on(‘interrupt’), this API is used to listen for focus changes. The AudioCapturer instance proactively gains the focus when the start event occurs and releases the focus when the pause or stop event occurs. Therefore, you do not need to request to gain or release the focus.

System capability: SystemCapability.Multimedia.Audio.Interrupt

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘audioInterrupt’ is triggered when audio capturing is interrupted.
callback	Callback<InterruptEvent>	Yes	Callback used to return the audio interruption event.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

import audio from '@ohos.multimedia.audio';
let isCapturing: boolean; // An identifier specifying whether capturing is in progress.
onAudioInterrupt();

async function onAudioInterrupt(){
  audioCapturer.on('audioInterrupt', (interruptEvent: audio.InterruptEvent) => {
    if (interruptEvent.forceType == audio.InterruptForceType.INTERRUPT_FORCE) {
      // The system forcibly interrupts audio capturing. The application must update the status and displayed content accordingly.
      switch (interruptEvent.hintType) {
        case audio.InterruptHint.INTERRUPT_HINT_PAUSE:
          // The audio stream has been paused and temporarily loses the focus. It will receive the interruptEvent corresponding to resume when it is able to regain the focus.
          console.info('Force paused. Update capturing status and stop reading');
          isCapturing = false; // A simplified processing indicating several operations for switching the application to the paused state.
          break;
        case audio.InterruptHint.INTERRUPT_HINT_STOP:
          // The audio stream has been stopped and permanently loses the focus. The user must manually trigger the operation to resume capturing.
          console.info('Force stopped. Update capturing status and stop reading');
          isCapturing = false; // A simplified processing indicating several operations for switching the application to the paused state.
          break;
        default:
          console.info('Invalid interruptEvent');
          break;
      }
    } else if (interruptEvent.forceType == audio.InterruptForceType.INTERRUPT_SHARE) {
      // The application can choose to take action or ignore.
      switch (interruptEvent.hintType) {
        case audio.InterruptHint.INTERRUPT_HINT_RESUME:
          // It is recommended that the application continue capturing. (The audio stream has been forcibly paused and temporarily lost the focus. It can resume capturing now.)
          console.info('Resume force paused renderer or ignore');
          // To continue capturing, the application must perform the required operations.
          break;
        case audio.InterruptHint.INTERRUPT_HINT_PAUSE:
          // It is recommended that the application pause capturing.
          console.info('Choose to pause or ignore');
          // To pause capturing, the application must perform the required operations.
          break;
        case audio.InterruptHint.INTERRUPT_HINT_STOP:
          // It is recommended that the application stop capturing.
          console.info('Choose to stop or ignore');
          // To stop capturing, the application must perform the required operations.
          break;
        default:
          break;
      }
    }
  });
}

off(‘audioInterrupt’)¹⁰⁺

off(type: ‘audioInterrupt’): void

Unsubscribes from audio interruption events.

System capability: SystemCapability.Multimedia.Audio.Interrupt

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘audioInterrupt’ is triggered when audio capturing is interrupted.

Error codes

For details about the error codes, see Audio Error Codes.

ID	Error Message
6800101	if input parameter value error

Example

audioCapturer.off('audioInterrupt');

on(‘inputDeviceChange’)¹¹⁺

on(type: ‘inputDeviceChange’, callback: Callback<AudioDeviceDescriptors>): void

Subscribes to audio input device change events.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘inputDeviceChange’ is triggered when the audio input device is changed.
callback	Callback<AudioDeviceDescriptors>	Yes	Callback used to return the result.

Error codes

ID	Error Message
6800101	Input parameter value error.

Example

audioCapturer.on('inputDeviceChange', (deviceChangeInfo: audio.AudioDeviceDescriptors) => {
  console.info(`inputDevice id: ${deviceChangeInfo[0].id}`);
  console.info(`inputDevice deviceRole: ${deviceChangeInfo[0].deviceRole}`);
  console.info(`inputDevice deviceType: ${deviceChangeInfo[0].deviceType}`);
});

off(‘inputDeviceChange’)¹¹⁺

off(type: ‘inputDeviceChange’, callback?: Callback<AudioDeviceDescriptors>): void

Unsubscribes from audio input device change events.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘inputDeviceChange’ is triggered when the audio input device is changed.
callback	Callback<AudioDeviceDescriptors>	No	Callback used for unsubscription.

Error codes

ID	Error Message
6800101	Input parameter value error.

Example

audioCapturer.off('inputDeviceChange');

on(‘audioCapturerChange’)¹¹⁺

on(type: ‘audioCapturerChange’, callback: Callback<AudioCapturerChangeInfo>): void

Subscribes to audio capturer change events.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘audioCapturerChange’ is triggered when the audio capturer is changed.
callback	Callback<AudioCapturerChangeInfo>	Yes	Callback used to return the result.

Error codes

ID	Error Message
6800101	Input parameter value error.

Example

audioCapturer.on('audioCapturerChange', (capturerChangeInfo: audio.AudioCapturerChangeInfo) => {
  console.info(`audioCapturerChange id: ${capturerChangeInfo[0].id}`);
  console.info(`audioCapturerChange deviceRole: ${capturerChangeInfo[0].deviceRole}`);
  console.info(`audioCapturerChange deviceType: ${capturerChangeInfo[0].deviceType}`);
});

off(‘audioCapturerChange’)¹¹⁺

off(type: ‘audioCapturerChange’, callback?: Callback<AudioCapturerChangeInfo>): void

Unsubscribes from audio capturer change events.

System capability: SystemCapability.Multimedia.Audio.Device

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The event ‘audioCapturerChange’ is triggered when the audio capturer is changed.
callback	Callback<AudioCapturerChangeInfo>	No	Callback used for unsubscription.

Error codes

ID	Error Message
6800101	Input parameter value error.

Example

audioCapturer.off('audioCapturerChange');

on(‘markReach’)⁸⁺

on(type: ‘markReach’, frame: number, callback: Callback&lt;number&gt;): void

Subscribes to mark reached events. When the number of frames captured reaches the value of the frame parameter, a callback is invoked.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is fixed at ‘markReach’.
frame	number	Yes	Number of frames to trigger the event. The value must be greater than 0.
callback	Callback<number>	Yes	Callback invoked when the event is triggered.

Example

audioCapturer.on('markReach', 1000, (position: number) => {
  if (position == 1000) {
    console.info('ON Triggered successfully');
  }
});

off(‘markReach’)⁸⁺

off(type: ‘markReach’): void

Unsubscribes from mark reached events.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is fixed at ‘markReach’.

Example

audioCapturer.off('markReach');

on(‘periodReach’)⁸⁺

on(type: ‘periodReach’, frame: number, callback: Callback&lt;number&gt;): void

Subscribes to period reached events. When the number of frames captured reaches the value of the frame parameter, a callback is triggered and the specified value is returned.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is fixed at ‘periodReach’.
frame	number	Yes	Number of frames to trigger the event. The value must be greater than 0.
callback	Callback<number>	Yes	Callback invoked when the event is triggered.

Example

audioCapturer.on('periodReach', 1000, (position: number) => {
  if (position == 1000) {
    console.info('ON Triggered successfully');
  }
});

off(‘periodReach’)⁸⁺

off(type: ‘periodReach’): void

Unsubscribes from period reached events.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is fixed at ‘periodReach’.

Example

audioCapturer.off('periodReach')

on(‘stateChange’)⁸⁺

on(type: ‘stateChange’, callback: Callback): void

Subscribes to state change events.

System capability: SystemCapability.Multimedia.Audio.Capturer

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value stateChange means the state change event.
callback	Callback<AudioState>	Yes	Callback used to return the state change.

Example

audioCapturer.on('stateChange', (state: audio.AudioState) => {
  if (state == 1) {
    console.info('audio capturer state is: STATE_PREPARED');
  }
  if (state == 2) {
    console.info('audio capturer state is: STATE_RUNNING');
  }
});

ToneType⁹⁺

Enumerates the tone types of the player.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Tone

Name	Value	Description
TONE_TYPE_DIAL_0	0	DTMF tone of key 0.
TONE_TYPE_DIAL_1	1	DTMF tone of key 1.
TONE_TYPE_DIAL_2	2	DTMF tone of key 2.
TONE_TYPE_DIAL_3	3	DTMF tone of key 3.
TONE_TYPE_DIAL_4	4	DTMF tone of key 4.
TONE_TYPE_DIAL_5	5	DTMF tone of key 5.
TONE_TYPE_DIAL_6	6	DTMF tone of key 6.
TONE_TYPE_DIAL_7	7	DTMF tone of key 7.
TONE_TYPE_DIAL_8	8	DTMF tone of key 8.
TONE_TYPE_DIAL_9	9	DTMF tone of key 9.
TONE_TYPE_DIAL_S	10	DTMF tone of the star key (*).
TONE_TYPE_DIAL_P	11	DTMF tone of the pound key (#).
TONE_TYPE_DIAL_A	12	DTMF tone of key A.
TONE_TYPE_DIAL_B	13	DTMF tone of key B.
TONE_TYPE_DIAL_C	14	DTMF tone of key C.
TONE_TYPE_DIAL_D	15	DTMF tone of key D.
TONE_TYPE_COMMON_SUPERVISORY_DIAL	100	Supervisory tone - dial tone.
TONE_TYPE_COMMON_SUPERVISORY_BUSY	101	Supervisory tone - busy.
TONE_TYPE_COMMON_SUPERVISORY_CONGESTION	102	Supervisory tone - congestion.
TONE_TYPE_COMMON_SUPERVISORY_RADIO_ACK	103	Supervisory tone - radio path acknowledgment.
TONE_TYPE_COMMON_SUPERVISORY_RADIO_NOT_AVAILABLE	104	Supervisory tone - radio path not available.
TONE_TYPE_COMMON_SUPERVISORY_CALL_WAITING	106	Supervisory tone - call waiting tone.
TONE_TYPE_COMMON_SUPERVISORY_RINGTONE	107	Supervisory tone - ringing tone.
TONE_TYPE_COMMON_PROPRIETARY_BEEP	200	Proprietary tone - beep tone.
TONE_TYPE_COMMON_PROPRIETARY_ACK	201	Proprietary tone - ACK.
TONE_TYPE_COMMON_PROPRIETARY_PROMPT	203	Proprietary tone - PROMPT.
TONE_TYPE_COMMON_PROPRIETARY_DOUBLE_BEEP	204	Proprietary tone - double beep tone.

TonePlayer⁹⁺

Provides APIs for playing and managing DTMF tones, such as dial tones, ringback tones, supervisory tones, and proprietary tones.

System API: This is a system API.

load⁹⁺

load(type: ToneType, callback: AsyncCallback&lt;void&gt;): void

Loads the DTMF tone configuration. This API uses an asynchronous callback to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Tone

Parameters

Name	Type	Mandatory	Description
type	ToneType	Yes	Tone type.
callback	AsyncCallback	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
tonePlayer.load(audio.ToneType.TONE_TYPE_DIAL_5, (err: BusinessError) => {
  if (err) {
    console.error(`callback call load failed error: ${err.message}`);
    return;
  } else {
    console.info('callback call load success');
  }
});

load⁹⁺

load(type: ToneType): Promise&lt;void&gt;

Loads the DTMF tone configuration. This API uses a promise to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Tone

Parameters

Name	Type	Mandatory	Description
type	ToneType	Yes	Tone type.

Return value

Type	Description
Promise	Promise used to return the result.

Example

tonePlayer.load(audio.ToneType.TONE_TYPE_DIAL_1).then(() => {
  console.info('promise call load ');
}).catch(() => {
  console.error('promise call load fail');
});

start⁹⁺

start(callback: AsyncCallback&lt;void&gt;): void

Starts DTMF tone playing. This API uses an asynchronous callback to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Tone

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
tonePlayer.start((err: BusinessError) => {
  if (err) {
    console.error(`callback call start failed error: ${err.message}`);
    return;
  } else {
    console.info('callback call start success');
  }
});

start⁹⁺

start(): Promise&lt;void&gt;

Starts DTMF tone playing. This API uses a promise to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Tone

Return value

Type	Description
Promise	Promise used to return the result.

Example

tonePlayer.start().then(() => {
  console.info('promise call start');
}).catch(() => {
  console.error('promise call start fail');
});

stop⁹⁺

stop(callback: AsyncCallback&lt;void&gt;): void

Stops the tone that is being played. This API uses an asynchronous callback to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Tone

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
tonePlayer.stop((err: BusinessError) => {
  if (err) {
    console.error(`callback call stop error: ${err.message}`);
    return;
  } else {
    console.error('callback call stop success ');
  }
});

stop⁹⁺

stop(): Promise&lt;void&gt;

Stops the tone that is being played. This API uses a promise to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Tone

Return value

Type	Description
Promise	Promise used to return the result.

Example

tonePlayer.stop().then(() => {
  console.info('promise call stop finish');
}).catch(() => {
  console.error('promise call stop fail');
});

release⁹⁺

release(callback: AsyncCallback&lt;void&gt;): void

Releases the resources associated with the TonePlayer instance. This API uses an asynchronous callback to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Tone

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback	Yes	Callback used to return the result.

Example

import { BusinessError } from '@ohos.base';
tonePlayer.release((err: BusinessError) => {
  if (err) {
    console.error(`callback call release failed error: ${err.message}`);
    return;
  } else {
    console.info('callback call release success ');
  }
});

release⁹⁺

release(): Promise&lt;void&gt;

Releases the resources associated with the TonePlayer instance. This API uses a promise to return the result.

System API: This is a system API.

System capability: SystemCapability.Multimedia.Audio.Tone

Return value

Type	Description
Promise	Promise used to return the result.

Example

tonePlayer.release().then(() => {
  console.info('promise call release');
}).catch(() => {
  console.error('promise call release fail');
});

ActiveDeviceType^(deprecated)

Enumerates the active device types.

NOTE

This API is deprecated since API version 9. You are advised to use CommunicationDeviceType instead.

System capability: SystemCapability.Multimedia.Audio.Device

Name	Value	Description
SPEAKER	2	Speaker.
BLUETOOTH_SCO	7	Bluetooth device using Synchronous Connection Oriented (SCO) links.

InterruptActionType^(deprecated)

Enumerates the returned event types for audio interruption events.

NOTE

This API is supported since API version 7 and deprecated since API version 9.

System capability: SystemCapability.Multimedia.Audio.Renderer

Name	Value	Description
TYPE_ACTIVATED	0	Focus gain event.
TYPE_INTERRUPT	1	Audio interruption event.

AudioInterrupt^(deprecated)

Describes input parameters of audio interruption events.

NOTE

This API is supported since API version 7 and deprecated since API version 9.

System capability: SystemCapability.Multimedia.Audio.Renderer

Name	Type	Mandatory	Description
streamUsage	StreamUsage	Yes	Audio stream usage.
contentType	ContentType	Yes	Audio content type.
pauseWhenDucked	boolean	Yes	Whether audio playback can be paused during audio interruption. The value true means that audio playback can be paused during audio interruption, and false means the opposite.

InterruptAction^(deprecated)

Describes the callback invoked for audio interruption or focus gain events.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use InterruptEvent.

System capability: SystemCapability.Multimedia.Audio.Renderer

Name	Type	Mandatory	Description
actionType	InterruptActionType	Yes	Returned event type. The value TYPE_ACTIVATED means the focus gain event, and TYPE_INTERRUPT means the audio interruption event.
type	InterruptType	No	Type of the audio interruption event.
hint	InterruptHint	No	Hint provided along with the audio interruption event.
activated	boolean	No	Whether the focus is gained or released. The value true means that the focus is gained or released, and false means that the focus fails to be gained or released.

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