harmony 鸿蒙Audio Interruption Mode Development

2022-08-09
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Audio Interruption Mode Development

Introduction

The audio interruption mode is used to control the playback of multiple audio streams.

Audio applications can set the audio interruption mode to independent or shared under AudioRenderer.

In shared mode, multiple audio streams share one session ID. In independent mode, each audio stream has an independent session ID.

Asynchronous operation: To prevent the UI thread from being blocked, most AudioRenderer calls are asynchronous. Each API provides the callback and promise functions. The following examples use the promise functions.

How to Develop

For details about the APIs, see AudioRenderer in Audio Management.

Use createAudioRenderer() to create an AudioRenderer instance.

Set parameters of the AudioRenderer instance in audioRendererOptions.

This instance is used to render audio, control and obtain the rendering status, and register a callback for notification.

   import audio from '@ohos.multimedia.audio';
   
   var audioStreamInfo = {
     samplingRate: audio.AudioSamplingRate.SAMPLE_RATE_44100,
     channels: audio.AudioChannel.CHANNEL_1,
     sampleFormat: audio.AudioSampleFormat.SAMPLE_FORMAT_S16LE,
  encodingType: audio.AudioEncodingType.ENCODING_TYPE_RAW
   }
   
   var audioRendererInfo = {
     content: audio.ContentType.CONTENT_TYPE_SPEECH,
     usage: audio.StreamUsage.STREAM_USAGE_VOICE_COMMUNICATION,
  rendererFlags: 1
   }
   
   var audioRendererOptions = {
     streamInfo: audioStreamInfo,
  rendererInfo: audioRendererInfo
   }
   
let audioRenderer = await audio.createAudioRenderer(audioRendererOptions);

Set the audio interruption mode.

After the AudioRenderer instance is initialized, you can set the audio interruption mode.

    var mode_ = audio.InterruptMode.SHARE_MODE;
    await this.audioRenderer.setInterruptMode(mode_).then(() => {
      console.log('[JSAR] [SetInterruptMode] Setting: '+ (mode_ == 0? " share mode":"independent mode") + "success");
    });