| type | string | Yes| Type of the event to subscribe to. The following events are supported: 'play' \| 'pause' \| 'stop' \| 'reset' \| 'dataLoad' \| 'finish' \| 'volumeChange' <br>- The 'play' event is triggered when the [play()](#audioplayer_play) method is called and audio playback starts. <br>- The 'pause' event is triggered when the [pause()](#audioplayer_pause) method is called and audio playback is paused. <br>- The 'stop' event is triggered when the [stop()](#audioplayer_stop) method is called and audio playback stops. <br>- The 'reset' event is triggered when the [reset()](#audioplayer_reset) method is called and audio playback is reset. <br>- The 'dataLoad' event is triggered when the audio data is loaded, that is, when the **src** attribute is configured. <br>- The 'finish' event is triggered when the audio playback is finished. <br>- The 'volumeChange' event is triggered when the [setVolume()](#audioplayer_setvolume) method is called and the playback volume is changed.|
| type | string | Yes| Type of the event to subscribe to. The following events are supported: 'play' \| 'pause' \| 'stop' \| 'reset' \| 'dataLoad' \| 'finish' \| 'volumeChange' <br>- The 'play' event is triggered when the [play()](#play) method is called and audio playback starts. <br>- The 'pause' event is triggered when the [pause()](#pause) method is called and audio playback is paused. <br>- The 'stop' event is triggered when the [stop()](#stop) method is called and audio playback stops. <br>- The 'reset' event is triggered when the [reset()](#reset7) method is called and audio playback is reset. <br>- The 'dataLoad' event is triggered when the audio data is loaded, that is, when the **src** attribute is configured. <br>- The 'finish' event is triggered when the audio playback is finished. <br>- The 'volumeChange' event is triggered when the [setVolume()](#setvolume) method is called and the playback volume is changed.|
| callback | () => void | Yes| Callback invoked when the event is triggered.|
**Example**
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...
@@ -467,13 +467,13 @@ audioPlayer.src = 'file:///data/data/ohos.xxx.xxx/files/test.mp4'; // Set the s
| type | string | Yes| Type of the event to subscribe to, which is 'timeUpdate' in this method. <br>The 'timeUpdate' event is triggered when the [seek()](#audioplayer_seek) method is called.|
| type | string | Yes| Type of the event to subscribe to, which is 'timeUpdate' in this method. <br>The 'timeUpdate' event is triggered when the [seek()](#seek) method is called.|
| callback | Callback\<number> | Yes| Callback invoked when the event is triggered. The input parameter of the callback is the time when the seek operation is successful.|
Implements audio recording. Before calling a method of the **AudioRecorder** class, you must call [createAudioRecorder()](#createaudiorecorder-audiorecorder) to create an **AudioRecorder** instance.
Implements audio recording. Before calling a method of the **AudioRecorder** class, you must call [createAudioRecorder()](#mediacreateaudiorecorder) to create an **AudioRecorder** instance.
### prepare
...
...
@@ -575,6 +575,7 @@ Prepares for recording.
**Example**
```
var audiorecorder = media.createAudioRecorder();
let audioRecorderConfig = {
audioEncoder : AAC_LC ,
audioEncodeBitRate : 22050,
...
...
@@ -596,6 +597,7 @@ Starts audio recording.
**Example**
```
var audiorecorder = media.createAudioRecorder();
audiorecorder.start();
```
...
...
@@ -608,6 +610,7 @@ Stops audio recording.
**Example**
```
var audiorecorder = media.createAudioRecorder();
audiorecorder.stop();
```
...
...
@@ -620,6 +623,7 @@ Releases this **AudioRecorder** instance.
**Example**
```
var audiorecorder = media.createAudioRecorder();
audiorecorder.release();
```
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...
@@ -634,6 +638,7 @@ Before resetting audio recording, you must call **stop()** to stop recording. Af
**Example**
```
var audiorecorder = media.createAudioRecorder();
audiorecorder.reset();
```
...
...
@@ -653,6 +658,7 @@ Subscribes to the audio recording events.
@@ -18,7 +18,7 @@ This subsystem offers various media services covering audio, videos, and cameras
-**Media**: provides playback and recording APIs for applications, and invokes the Gstreamer, Histreamer, or other engines through cross-process calling or direct calling.
- For the mini system, the media component invokes Histreamer to support audio playback.
- For the small system, the media component invokes recorder_lite to support audio/video recording and invokes player_lite by default to support audio/video playback. If the system variable **debug.media_service.histreamer** is set to **1**, the component invokes Histreamer to support audio/video playback. For details, see [syspara Module](https://device.harmonyos.com/en/docs/documentation/guide/subsys-boot-syspara-0000001063362360) or [syspara_lite](https://gitee.com/openharmony/startup_syspara_lite).
- For the small system, the media component invokes recorder_lite to support audio/video recording and invokes player_lite by default to support audio/video playback. If the system variable **debug.media_service.histreamer** is set to **1**, the component invokes Histreamer to support audio/video playback. For details, see [syspara Module](https://gitee.com/openharmony/docs/blob/master/en/device-dev/subsystems/subsys-boot-syspara.md) or [syspara_lite](https://gitee.com/openharmony/startup_syspara_lite).
- For the standard system, the media component invokes Gstreamer to support audio/video playback and recording.
-**Audio**: supports audio input and output, policy management, and audio focus management.
-**Camera**: provides camera operation APIs for preview, photographing, and video recording.
