harmony 鸿蒙SoundPool (Sound Pool)

  • 2023-10-30
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SoundPool (Sound Pool)

The SoundPool module provides APIs for loading, unloading, playing, and stopping playing system sounds, setting the volume, and setting the number of loops.

Before using these APIs, you must call media.createSoundPool to create a SoundPool instance.

NOTE

The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.

Modules to Import

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

PlayParameters

Describes the playback parameters of the sound pool.

These parameters are used to control the playback volume, number of loops, and priority.

System capability: SystemCapability.Multimedia.Media.SoundPool

Name Type Mandatory Description
loop number No Number of loops. The value 0 means that the sound does not loop (the sound is played once), and -1 means that the sound loops forever.
rate number No Playback rate. For details, see AudioRendererRate.
leftVolume number No Volume of the left channel. The value ranges from 0 to 1.
rightVolume number No Volume of the right channel. (Currently, the volume cannot be set separately for the left and right channels. The volume set for the left channel is used.)
priority number No Playback priority. The value 0 means the lowest priority. A larger value indicates a higher priority.
parallelPlayFlag boolean No Whether the sound can be played in parallel with other active audio streams. The value true means that the sound can be played in parallel with other active audio streams, without preempting the audio focus, and false means the opposite.
This is a system API.

SoundPool

Implements a sound pool that provides APIs for loading, unloading, playing, and stopping playing system sounds, setting the volume, and setting the number of loops. Before using these APIs, you must call createSoundPool to create a SoundPool instance.

load

load(uri: string, callback: AsyncCallback<number>): void

Loads a sound. This API uses an asynchronous callback to obtain the sound ID. The input parameter uri is a string starting with fd://, which is generated based on the file descriptor (FD) obtained.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
uri string Yes URI of the audio file to load. Generally, the URI starts with fd://.
callback AsyncCallback<number> Yes Callback used to return the ID of the sound loaded. A valid value must be greater than 0.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by callback.
5400103 I/O error. Return by callback.
5400105 Service died. Return by callback.

Example

import fs from '@ohos.file.fs';
// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let uri:string = "";

// Obtain the URI starting with fd://.
fs.open('/test_01.mp3', fs.OpenMode.READ_ONLY).then((file:fs.File) => {
  console.info("file fd: " + file.fd);
  uri = 'fd://' + (file.fd).toString()
}); // '/test_01.mp3' here is only an example. You need to pass in the actual URI.

soundPool.load(uri, (error: BusinessError, soundId_: number) => {
  if (error) {
    console.info(`load soundPool Error: errCode is ${error.code}, errMessage is ${error.message}`)
  } else {
    console.info(`load soundPool Success` + JSON.stringify(soundId_))
  }
})

load

load(uri: string): Promise<number>

Loads a sound. This API uses a promise to obtain the sound ID. The input parameter uri is a starting with fd://, which is generated based on the FD obtained.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
uri string Yes URI of the audio file to load. Generally, the URI starts with fd://.

Return value

Type Description
Promise<number> Promise used to return the ID of the sound loaded. A valid value must be greater than 0.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by promise.
5400103 I/O error. Return by promise.
5400105 Service died. Return by promise.

Example

import fs from '@ohos.file.fs';
// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let uri:string = "";
let soundID: number;

// Obtain the URI starting with fd://.
fs.open('/test_01.mp3', fs.OpenMode.READ_ONLY).then((file: fs.File) => {
  console.info("file fd: " + file.fd);
  uri = 'fd://' + (file.fd).toString()
}); // '/test_01.mp3' here is only an example. You need to pass in the actual URI.

soundPool.load(uri).then((soundId: number) => {
  console.info('soundPool load uri success');
  soundID = soundId;
}).catch((err) => {
  console.error('soundPool load failed and catch error is ' + err.message);
});

load

load(fd: number, offset: number, length: number, callback: AsyncCallback<number>): void

Loads a sound. This API uses an asynchronous callback to obtain the sound ID. The input parameter fd can be manually input or automatically obtained by reading the embedded resource of the application.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
fd number Yes Resource handle, which is obtained by calling resourceManager.getRawFileDescriptor.
offset number Yes Resource offset, which needs to be entered based on the preset resource information. An invalid value causes a failure to parse audio and video resources.
length number Yes Resource length, which needs to be entered based on the preset resource information. An invalid value causes a failure to parse audio and video resources.
callback AsyncCallback<number> Yes Callback used to return the sound ID. A valid value must be greater than 0.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by callback.
5400103 I/O error. Return by callback.
5400105 Service died. Return by callback.

Example

import fs from '@ohos.file.fs';
// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let fd: number;
let soundID: number;
let fileSize: number; // Obtain the size through fs.stat().
let uri: string = "";
// Obtain the FD.
fs.open('/test_01.mp3', fs.OpenMode.READ_ONLY).then((file: fs.File) => {
  console.info("file fd: " + file.fd);
  uri = 'fd://' + (file.fd).toString()
}); // '/test_01.mp3' here is only an example. You need to pass in the actual URI.

soundPool.load(file.fd, 0, fileSize, (error: BusinessError, soundId_: number) => {
  if (error) {
    console.info(`load soundPool Error: errCode is ${error.code}, errMessage is ${error.message}`)
  } else {
    soundID = soundId_;
    console.info('load success soundid:' + soundId_);
  }
})

load

load(fd: number, offset: number, length: number): Promise<number>

Loads a sound. This API uses a promise to obtain the sound ID. The input parameter fd can be manually input or automatically obtained by reading the embedded resource of the application.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
fd number Yes Resource handle, which is obtained by calling resourceManager.getRawFileDescriptor.
offset number Yes Resource offset, which needs to be entered based on the preset resource information. An invalid value causes a failure to parse audio and video resources.
length number Yes Resource length, which needs to be entered based on the preset resource information. An invalid value causes a failure to parse audio and video resources.

Return value

Type Description
Promise<number> Promise used to return the sound ID. A valid value must be greater than 0.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by promise.
5400103 I/O error. Return by promise.
5400105 Service died. Return by promise.

Example

import fs from '@ohos.file.fs';
// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let fd: number;
let soundID: number;
let fileSize: number; // Obtain the size through fs.stat().
let uri: string = "";
// Obtain the FD.
fs.open('/test_01.mp3', fs.OpenMode.READ_ONLY).then((file: fs.File) => {
  console.info("file fd: " + file.fd);
  uri = 'fd://' + (file.fd).toString()
}); 

soundPool.load(file.fd, 0, fileSize).then((soundId: number) => {
  console.info('load success');
  soundID = soundId;
}).catch((err) => {
  console.error('soundpool load failed and catch error is ' + err.message);
});

play

play(soundID: number, params: PlayParameters, callback: AsyncCallback<number>): void

Plays a sound. This API uses an asynchronous callback to obtain the audio stream ID.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
soundID number Yes Sound ID, which is obtained by calling load().
params PlayParameters Yes Playback parameters.
callback AsyncCallback<number> Yes Callback used to return the ID of the audio stream. A valid value must be greater than 0.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by callback.
5400105 Service died. Return by callback.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let soundID: number;
let streamID: number;
let playParameters: media.PlayParameters = {
    loop: 3, // The sound is played four times (three loops).
    rate: audio.AudioRendererRate.RENDER_RATE_NORMAL, // The sound is played at the original frequency.
    leftVolume: 0.5, // range = 0.0-1.0
    rightVolume: 0.5, // range = 0.0-1.0
    priority: 0, // The sound playback has the lowest priority.
    parallelPlayFlag: false // The sound is not played in parallel with other active audio streams.
  }
soundPool.play(soundID, playParameters, (error: BusinessError, streamId: number) => {
  if (error) {
    console.info(`play sound Error: errCode is ${error.code}, errMessage is ${error.message}`)
  } else {
    streamID = streamId;
    console.info('play success soundid:' + streamId);
  }
})

play

play(soundID: number, callback: AsyncCallback<number>): void

Plays a sound. This API uses an asynchronous callback to obtain the audio stream ID.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
soundID number Yes Sound ID, which is obtained by calling load().
callback AsyncCallback<number> Yes Callback used to return the ID of the audio stream. A valid value must be greater than 0.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by callback.
5400105 Service died. Return by callback.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let soundID: number;
let streamID: number;
soundPool.play(soundID,  (error: BusinessError, streamId: number) => {
  if (error) {
    console.info(`play sound Error: errCode is ${error.code}, errMessage is ${error.message}`)
  } else {
    streamID = streamId;
    console.info('play success soundid:' + streamId);
  }
})

play

play(soundID: number, params?: PlayParameters): Promise<number>

Plays a sound. This API uses a promise to obtain the audio stream ID.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
soundID number Yes Sound ID, which is obtained by calling load().
params PlayParameters No Playback parameters.

Return value

Type Description
Promise<number> Promise used to return the ID of the audio stream. A valid value must be greater than 0.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by promise.
5400105 Service died. Return by promise.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let soundID: number;
let streamID: number;
let playParameters: media.PlayParameters = {
    loop: 3, // The sound is played four times (three loops).
    rate: audio.AudioRendererRate.RENDER_RATE_NORMAL, // The sound is played at the original frequency.
    leftVolume: 0.5, // range = 0.0-1.0
    rightVolume: 0.5, // range = 0.0-1.0
    priority: 0, // The sound playback has the lowest priority.
    parallelPlayFlag: false // The sound is not played in parallel with other active audio streams.
  }

soundPool.play(soundID, playParameters).then((streamId: number) => {
  console.info('play success');
  streamID = streamId;
}).catch((err: BusinessError) => {
  console.error('soundpool play failed and catch error is ' + err.message);
});

stop

stop(streamID: number, callback: AsyncCallback<void>): void

Stops playing a sound. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
streamID number Yes Audio stream ID, which is obtained by calling play().
callback AsyncCallback<void> Yes Callback used to return the result.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by callback.
5400105 Service died. Return by callback.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let streamID: number;
// Call play() to obtain the stream ID.
soundPool.stop(streamID, (error: BusinessError) => {
  if (error) {
    console.info(`stop sound Error: errCode is ${error.code}, errMessage is ${error.message}`)
  } else {
    console.info('stop success');
  }
})

stop

stop(streamID: number): Promise<void>

Stops playing a sound. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
streamID number Yes Audio stream ID, which is obtained by calling play().

Return value

Type Description
Promise<void> Promise that returns no value.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by promise.
5400105 Service died. Return by promise.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let streamID: number;
// Call play() to obtain the stream ID.
soundPool.stop(streamID).then(() => {
  console.info('stop success');
}).catch((err) => {
  console.error('soundpool load stop and catch error is ' + err.message);
});

setLoop

setLoop(streamID: number, loop: number, callback: AsyncCallback<void>): void;

Sets the loop mode for an audio stream. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
streamID number Yes Audio stream ID, which is obtained by calling play().
loop number Yes Number of loops. The value 0 means that the sound does not loop (the sound is played once), and a value smaller than 0 means that the sound loops forever.
callback AsyncCallback<void> Yes Callback used to return the result.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by callback.
5400105 Service died. Return by callback.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let streamID: number;
// Call play() to obtain the stream ID.
// Set the number of loops to 2.
soundPool.setLoop(streamID, 2, (error: BusinessError) => {
  if (error) {
    console.info(`setLoop soundPool Error: errCode is ${error.code}, errMessage is ${error.message}`)
  } else {
    console.info('setLoop success streamID:' + streamID);
  }
})

setLoop

setLoop(streamID: number, loop: number): Promise<void>

Sets the loop mode for an audio stream. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
streamID number Yes Audio stream ID, which is obtained by calling play().
loop number Yes Number of loops. The value 0 means that the sound does not loop (the sound is played once), and a value smaller than 0 means that the sound loops forever.

Return value

Type Description
Promise<void> Promise that returns no value.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by promise.
5400105 Service died. Return by promise.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let streamID: number;
// Call play() to obtain the stream ID.
// Set the number of loops to 1.
soundPool.setLoop(streamID, 1).then(() => {
  console.info('setLoop success streamID:' + streamID);
}).catch((err) => {
  console.error('soundpool setLoop failed and catch error is ' + err.message);
});

setPriority

setPriority(streamID: number, priority: number, callback: AsyncCallback<void>): void

Sets the priority for an audio stream. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
streamID number Yes Audio stream ID, which is obtained by calling play().
priority number Yes Priority. The value 0 means the lowest priority.
callback AsyncCallback<void> Yes Callback used to return the result.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by callback.
5400105 Service died. Return by callback.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let streamID: number;
// Call play() to obtain the stream ID.
// Set the priority to 1.
soundPool.setPriority(streamID, 1, (error: BusinessError) => {
  if (error) {
    console.info(`setPriority soundPool Error: errCode is ${error.code}, errMessage is ${error.message}`)
  } else {
    console.info('setPriority success streamID:' + streamID);
  }
})

setPriority

setPriority(streamID: number, priority: number): Promise<void>

Sets the priority for an audio stream. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
streamID number Yes Audio stream ID, which is obtained by calling play().
priority number Yes Priority. The value 0 means the lowest priority.

Return value

Type Description
Promise<void> Promise that returns no value.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by promise.
5400105 Service died. Return by promise.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let streamID: number;
// Call play() to obtain the stream ID.
// Set the priority to 1.

soundPool.setPriority(streamID, 1).then(() => {
  console.info('setPriority success');
}).catch((err) => {
  console.error('soundpool setPriority failed and catch error is ' + err.message);
});

setRate

setRate(streamID: number, rate: audio.AudioRendererRate, callback: AsyncCallback<void>): void

Sets the playback rate for an audio stream. This API uses an asynchronous callback to return the result.

NOTE

Only the API definition is provided in OpenHarmony 4.0 Release, and the function is not implemented yet.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
streamID number Yes Audio stream ID, which is obtained by calling play().
rate audio.AudioRendererRate Yes Playback rate.
callback AsyncCallback<void> Yes Callback used to return the result.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by callback.
5400105 Service died. Return by callback.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let streamID: number;
let selectedAudioRendererRate: audio.AudioRendererRate = audio.AudioRendererRate.RENDER_RATE_NORMAL; // The sound is played at the original frequency.
// Call play() to obtain the stream ID.

soundPool.setRate(streamID, selectedAudioRendererRate, (error: BusinessError) => {
  if (error) {
    console.info(`setRate soundPool Error: errCode is ${error.code}, errMessage is ${error.message}`)
  } else {
    console.info('setRate success streamID:' + streamID);
  }
})

setRate

setRate(streamID: number, rate: audio.AudioRendererRate): Promise<void>

Sets the playback rate for an audio stream. This API uses a promise to return the result.

NOTE

Only the API definition is provided in OpenHarmony 4.0 Release, and the function is not implemented yet.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
streamID number Yes Audio stream ID, which is obtained by calling play().
rate audio.AudioRendererRate Yes Playback rate.

Return value

Type Description
Promise<void> Promise that returns no value.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by promise.
5400105 Service died. Return by promise.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let streamID: number;
let selectedAudioRendererRate: audio.AudioRendererRate = audio.AudioRendererRate.RENDER_RATE_NORMAL; // The sound is played at the original frequency.
// Call play() to obtain the stream ID.

soundPool.setRate(streamID, selectedAudioRendererRate).then(() => {
  console.info('setRate success');
}).catch((err) => {
  console.error('soundpool setRate failed and catch error is ' + err.message);
});

setVolume

setVolume(streamID: number, leftVolume: number, rightVolume: number, callback: AsyncCallback<void>): void

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

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
streamID number Yes Audio stream ID, which is obtained by calling play().
leftVolume number Yes Volume of the left channel. The value ranges from 0.0 to 1.0.
rightVolume number Yes Volume of the right channel. Currently, setting the volume for the right channel does not take effect. The volume set for the left channel is used.
callback AsyncCallback<void> Yes Callback used to return the result.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by callback.
5400105 Service died. Return by callback.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let streamID: number;
// Call play() to obtain the stream ID.
// Set the volume to 0.5.
soundPool.setVolume(streamID, 0.5, 0.5, (error: BusinessError) => {
  if (error) {
    console.info(`setVolume soundPool Error: errCode is ${error.code}, errMessage is ${error.message}`)
  } else {
    console.info('setVolume success streamID:' + streamID);
  }
})

setVolume

setVolume(streamID: number, leftVolume: number, rightVolume: number): Promise<void>

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

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
streamID number Yes Audio stream ID, which is obtained by calling play().
leftVolume number Yes Volume of the left channel. The value ranges from 0.0 to 1.0.
rightVolume number Yes Volume of the right channel. Currently, setting the volume for the right channel does not take effect. The volume set for the left channel is used.

Return value

Type Description
Promise<void> Promise that returns no value.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by promise.
5400105 Service died. Return by promise.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let streamID: number;
selectedAudioRendererRate: number = 0; // The sound plays at the original frequency.
// Call play() to obtain the stream ID.

soundPool.setVolume(streamID, 0.5, 0.5).then(() => {
  console.info('setVolume success');
}).catch((err) => {
  console.error('soundpool setVolume failed and catch error is ' + err.message);
});

unload

unload(soundID: number, callback: AsyncCallback<void>): void

Unloads a sound. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
soundID number Yes Sound ID, which is obtained by calling load().
callback AsyncCallback<void> Yes Callback used to return the result.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by callback.
5400103 I/O error. Return by callback.
5400105 Service died. Return by callback.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let soundID: number;
// Call load() to obtain the sound ID.
soundPool.unload(soundID, (error: BusinessError) => {
  if (error) {
    console.info(`unload soundPool Error: errCode is ${error.code}, errMessage is ${error.message}`)
  } else {
    console.info('unload success:');
  }
})

unload

unload(soundID: number): Promise<void>

Unloads a sound. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
soundID number Yes Sound ID, which is obtained by calling load().

Return value

Type Description
Promise<void> Promise that returns no value.

Error codes

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

ID Error Message
5400102 Operation not allowed. Return by promise.
5400103 I/O error. Return by promise.
5400105 Service died. Return by promise.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

let soundID: number;
// Call load() to obtain the sound ID.

soundPool.unload(soundID).then(() => {
  console.info('unload success');
}).catch((err) => {
  console.error('soundpool unload failed and catch error is ' + err.message);
});

release

release(callback: AsyncCallback<void>): void

Releases this SoundPool instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

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

Error codes

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

ID Error Message
5400105 Service died. Return by callback.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

soundPool.release((error: BusinessError) => {
  if (error) {
    console.info(`release soundPool Error: errCode is ${error.code}, errMessage is ${error.message}`)
  } else {
    console.info('release success');
  }
})

release

release(): Promise<void>

Releases this SoundPool instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Return value

Type Description
Promise<void> Promise that returns no value.

Error codes

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

ID Error Message
5400105 Service died. Return by promise.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

soundPool.release().then(() => {
  console.info('release success');
}).catch((err) => {
  console.error('soundpool release failed and catch error is ' + err.message);
});

on(‘loadComplete’)

on(type: ‘loadComplete’, callback: Callback<number>): void

Subscribes to events indicating that a sound finishes loading.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
type string Yes Event type, which is ‘loadComplete’ in this case. This event is triggered when a sound is loaded.
callback Callback<number> Yes ID of the sound that has been loaded.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

soundPool.on('loadComplete', (soundId: number) => {
  console.info('loadComplete success, soundId: ' + soundId)
})

off(‘loadComplete’)

off(type: ‘loadComplete’): void

Unsubscribes from events indicating that a sound finishes loading.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
type string Yes Event type. The value is fixed at ‘loadComplete’.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

soundPool.off('loadComplete')

on(‘playFinished’)

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

Subscribes to events indicating that a sound finishes playing.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
type string Yes Event type, which is ‘playFinished’ in this case. This event is triggered when a sound finishes playing.
callback Callback<void> Yes Callback used to return the result.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

soundPool.on('playFinished', () => {
  console.info('playFinished success')
})

off(‘playFinished’)

off(type: ‘playFinished’): void

Unsubscribes from events indicating that a sound finishes playing.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
type string Yes Event type. The value is fixed at ‘playFinished’.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

soundPool.off('playFinished')

on(‘error’)

on(type: ‘error’, callback: ErrorCallback): void

Subscribes to error events of this SoundPool instance. This event is used only for error prompt.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
type string Yes Event type, which is ‘error’ in this case. This event can be triggered by both user operations and the system.
callback function Yes Callback used to return the error code ID and error message.

The SoundPool class provides the following error types:

ID Error Message Description
401 Invalid Parameter: Incorrect input parameter, causing an invalid call.
801 Unsupport Capability: Unsupported API, causing an invalid call.
5400101 No Memory: Insufficient memory.
5400102 Operation Not Allowed: Unsupported operation in the current state, causing an invalid call.
5400103 IO Error: I/O exception.
5400105 Service Died: The playback process is dead, and the service on which the sound pool depends is abnormal.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});

soundPool.on('error', (error: BusinessError) => {
  console.error('error happened,and error message is :' + error.message)
  console.error('error happened,and error code is :' + error.code)
})

off(‘error’)

off(type: ‘error’): void

Unsubscribes from error events of this SoundPool instance.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name Type Mandatory Description
type string Yes Event type, which is ‘error’ in this case.

Example

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  content: audio.ContentType.CONTENT_TYPE_SPEECH,
  usage: audio.StreamUsage.STREAM_USAGE_MEDIA,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error, soundPool_: media.SoundPool) => {
  if (error) {
    console.info(`createSoundPool failed`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`createSoundPool success`)
  }
});
soundPool.off('error')

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