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提交 eb65b5aa 编写于 作者: J jiao_yanlin
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Sample code problem modification 

Signed-off-by: Njiao_yanlin <jiaoyanlin@huawei.com>
上级 06d61182
展开全部 隐藏空白更改
内联 并排
Showing with 437 addition and 445 deletion
zh-cn/application-dev/media/audio-capturer.md
浏览文件 @ eb65b5aa
...@@ -21,38 +21,48 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以 ...@@ -21,38 +21,48 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以
## 约束与限制 ## 约束与限制
开发者在进行音频数据采集功能开发前，需要先对所开发的应用配置麦克风权限（ohos.permission.MICROPHONE），权限配置相关内容可参考：[访问控制授权申请指导](../security/accesstoken-guidelines.md) 开发者在进行音频数据采集功能开发前，需要先对所开发的应用配置麦克风权限（ohos.permission.MICROPHONE），配置方式请参见[访问控制授权申请](../security/accesstoken-guidelines.md#配置文件权限声明)。
## 开发指导 ## 开发指导
详细API含义可参考：[音频管理API文档AudioCapturer](../reference/apis/js-apis-audio.md#audiocapturer8) 详细API含义可参考：[音频管理API文档AudioCapturer](../reference/apis/js-apis-audio.md#audiocapturer8)
1. 使用createAudioCapturer()创建一个AudioCapturer实例。 1. 使用createAudioCapturer()创建一个全局的AudioCapturer实例。
在audioCapturerOptions中设置音频采集器的相关参数。该实例可用于音频采集、控制和获取采集状态，以及注册通知回调。 在audioCapturerOptions中设置音频采集器的相关参数。该实例可用于音频采集、控制和获取采集状态，以及注册通知回调。
```js ```js
import audio from '@ohos.multimedia.audio'; import audio from '@ohos.multimedia.audio';
import fs from '@ohos.file.fs'; //便于步骤3 read函数调用
let audioStreamInfo = {
samplingRate: audio.AudioSamplingRate.SAMPLE_RATE_44100, //音频渲染相关接口自测试
channels: audio.AudioChannel.CHANNEL_1, @Entry
sampleFormat: audio.AudioSampleFormat.SAMPLE_FORMAT_S16LE, @Component
encodingType: audio.AudioEncodingType.ENCODING_TYPE_RAW struct AudioRenderer {
} @State message: string = 'Hello World'
private audioCapturer : audio.AudioCapturer; //供全局调用
let audioCapturerInfo = {
source: audio.SourceType.SOURCE_TYPE_MIC, async initAudioCapturer(){
capturerFlags: 0 // 0是音频采集器的扩展标志位，默认为0 let audioStreamInfo = {
} samplingRate: audio.AudioSamplingRate.SAMPLE_RATE_44100,
channels: audio.AudioChannel.CHANNEL_1,
let audioCapturerOptions = { sampleFormat: audio.AudioSampleFormat.SAMPLE_FORMAT_S16LE,
streamInfo: audioStreamInfo, encodingType: audio.AudioEncodingType.ENCODING_TYPE_RAW
capturerInfo: audioCapturerInfo }
}
let audioCapturerInfo = {
let audioCapturer = await audio.createAudioCapturer(audioCapturerOptions); source: audio.SourceType.SOURCE_TYPE_MIC,
console.log('AudioRecLog: Create audio capturer success.'); capturerFlags: 0 // 0是音频采集器的扩展标志位，默认为0
}
let audioCapturerOptions = {
streamInfo: audioStreamInfo,
capturerInfo: audioCapturerInfo
}
this.audioCapturer = await audio.createAudioCapturer(audioCapturerOptions);
console.log('AudioRecLog: Create audio capturer success.');
}
``` ```
2. 调用start()方法来启动/恢复采集任务。 2. 调用start()方法来启动/恢复采集任务。
...@@ -60,23 +70,18 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以 ...@@ -60,23 +70,18 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以
启动完成后，采集器状态将变更为STATE_RUNNING，然后应用可以开始读取缓冲区。 启动完成后，采集器状态将变更为STATE_RUNNING，然后应用可以开始读取缓冲区。
```js ```js
import audio from '@ohos.multimedia.audio'; async startCapturer() {
let state = this.audioCapturer.state;
async function startCapturer() {
let state = audioCapturer.state;
// Capturer start时的状态应该是STATE_PREPARED、STATE_PAUSED和STATE_STOPPED之一. // Capturer start时的状态应该是STATE_PREPARED、STATE_PAUSED和STATE_STOPPED之一.
if (state != audio.AudioState.STATE_PREPARED || state != audio.AudioState.STATE_PAUSED || if (state == audio.AudioState.STATE_PREPARED || state == audio.AudioState.STATE_PAUSED ||
state != audio.AudioState.STATE_STOPPED) { state == audio.AudioState.STATE_STOPPED) {
console.info('Capturer is not in a correct state to start'); await this.audioCapturer.start();
return; state = this.audioCapturer.state;
} if (state == audio.AudioState.STATE_RUNNING) {
await audioCapturer.start(); console.info('AudioRecLog: Capturer started');
} else {
state = audioCapturer.state; console.error('AudioRecLog: Capturer start failed');
if (state == audio.AudioState.STATE_RUNNING) { }
console.info('AudioRecLog: Capturer started');
} else {
console.error('AudioRecLog: Capturer start failed');
} }
} }
``` ```
...@@ -86,91 +91,88 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以 ...@@ -86,91 +91,88 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以
参考以下示例，将采集到的数据写入文件。 参考以下示例，将采集到的数据写入文件。
```js ```js
import fs from '@ohos.file.fs'; async readData(){
let state = this.audioCapturer.state;
let state = audioCapturer.state; // 只有状态为STATE_RUNNING的时候才可以read.
// 只有状态为STATE_RUNNING的时候才可以read. if (state != audio.AudioState.STATE_RUNNING) {
if (state != audio.AudioState.STATE_RUNNING) { console.info('Capturer is not in a correct state to read');
console.info('Capturer is not in a correct state to read'); return;
return;
}
const path = '/data/data/.pulse_dir/capture_js.wav'; // 采集到的音频文件存储路径
let file = fs.openSync(filePath, 0o2);
let fd = file.fd;
if (file !== null) {
console.info('AudioRecLog: file created');
} else {
console.info('AudioRecLog: file create : FAILED');
return;
}
if (fd !== null) {
console.info('AudioRecLog: file fd opened in append mode');
}
let numBuffersToCapture = 150; // 循环写入150次
let count = 0;
while (numBuffersToCapture) {
let bufferSize = await audioCapturer.getBufferSize();
let buffer = await audioCapturer.read(bufferSize, true);
let options = {
offset: count * this.bufferSize,
length: this.bufferSize
} }
if (typeof(buffer) == undefined) { const path = '/data/data/.pulse_dir/capture_js.wav'; // 采集到的音频文件存储路径
console.info('AudioRecLog: read buffer failed'); let file = fs.openSync(path, 0o2);
let fd = file.fd;
if (file !== null) {
console.info('AudioRecLog: file created');
} else { } else {
let number = fs.writeSync(fd, buffer, options); console.info('AudioRecLog: file create : FAILED');
console.info(`AudioRecLog: data written: ${number}`); return;
} }
numBuffersToCapture--; if (fd !== null) {
count++; console.info('AudioRecLog: file fd opened in append mode');
}
let numBuffersToCapture = 150; // 循环写入150次
let count = 0;
while (numBuffersToCapture) {
this.bufferSize = await this.audioCapturer.getBufferSize();
let buffer = await this.audioCapturer.read(this.bufferSize, true);
let options = {
offset: count * this.bufferSize,
length: this.bufferSize
}
if (typeof(buffer) == undefined) {
console.info('AudioRecLog: read buffer failed');
} else {
let number = fs.writeSync(fd, buffer, options);
console.info(`AudioRecLog: data written: ${number}`);
}
numBuffersToCapture--;
count++;
}
} }
``` ```
4. 采集完成后，调用stop方法，停止录制。 4. 采集完成后，调用stop方法，停止录制。
```js ```js
async function StopCapturer() { async StopCapturer() {
let state = audioCapturer.state; let state = this.audioCapturer.state;
// 只有采集器状态为STATE_RUNNING或STATE_PAUSED的时候才可以停止 // 只有采集器状态为STATE_RUNNING或STATE_PAUSED的时候才可以停止
if (state != audio.AudioState.STATE_RUNNING && state != audio.AudioState.STATE_PAUSED) { if (state != audio.AudioState.STATE_RUNNING && state != audio.AudioState.STATE_PAUSED) {
console.info('AudioRecLog: Capturer is not running or paused'); console.info('AudioRecLog: Capturer is not running or paused');
return; return;
} }
await audioCapturer.stop(); await this.audioCapturer.stop();
state = audioCapturer.state; state = this.audioCapturer.state;
if (state == audio.AudioState.STATE_STOPPED) { if (state == audio.AudioState.STATE_STOPPED) {
console.info('AudioRecLog: Capturer stopped'); console.info('AudioRecLog: Capturer stopped');
} else { } else {
console.error('AudioRecLog: Capturer stop failed'); console.error('AudioRecLog: Capturer stop failed');
} }
} }
``` ```
5. 任务结束，调用release()方法释放相关资源。 5. 任务结束，调用release()方法释放相关资源。
```js ```js
async function releaseCapturer() { async releaseCapturer() {
let state = audioCapturer.state; let state = this.audioCapturer.state;
// 采集器状态不是STATE_RELEASED或STATE_NEW状态，才能release // 采集器状态不是STATE_RELEASED或STATE_NEW状态，才能release
if (state == audio.AudioState.STATE_RELEASED || state == audio.AudioState.STATE_NEW) { if (state == audio.AudioState.STATE_RELEASED || state == audio.AudioState.STATE_NEW) {
console.info('AudioRecLog: Capturer already released'); console.info('AudioRecLog: Capturer already released');
return; return;
} }
await audioCapturer.release(); await this.audioCapturer.release();
state = audioCapturer.state; state = this.audioCapturer.state;
if (state == audio.AudioState.STATE_RELEASED) { if (state == audio.AudioState.STATE_RELEASED) {
console.info('AudioRecLog: Capturer released'); console.info('AudioRecLog: Capturer released');
} else { } else {
console.info('AudioRecLog: Capturer release failed'); console.info('AudioRecLog: Capturer release failed');
} }
} }
``` ```
6. （可选）获取采集器相关信息 6. （可选）获取采集器相关信息
...@@ -178,23 +180,20 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以 ...@@ -178,23 +180,20 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以
通过以下代码，可以获取采集器的相关信息。 通过以下代码，可以获取采集器的相关信息。
```js ```js
// 获取当前采集器状态 async getAudioCapturerInfo(){
let state = audioCapturer.state; // 获取当前采集器状态
let state = this.audioCapturer.state;
// 获取采集器信息 // 获取采集器信息
let audioCapturerInfo : audio.AuduioCapturerInfo = await audioCapturer.getCapturerInfo(); let audioCapturerInfo : audio.AudioCapturerInfo = await this.audioCapturer.getCapturerInfo();
// 获取音频流信息
// 获取音频流信息 let audioStreamInfo : audio.AudioStreamInfo = await this.audioCapturer.getStreamInfo();
let audioStreamInfo : audio.AudioStreamInfo = await audioCapturer.getStreamInfo(); // 获取音频流ID
let audioStreamId : number = await this.audioCapturer.getAudioStreamId();
// 获取音频流ID // 获取纳秒形式的Unix时间戳
let audioStreamId : number = await audioCapturer.getAudioStreamId(); let audioTime : number = await this.audioCapturer.getAudioTime();
// 获取合理的最小缓冲区大小
// 获取纳秒形式的Unix时间戳 let bufferSize : number = await this.audioCapturer.getBufferSize();
let audioTime : number = await audioCapturer.getAudioTime(); }
// 获取合理的最小缓冲区大小
let bufferSize : number = await audioCapturer.getBufferSize();
``` ```
7. （可选）使用on('markReach')方法订阅采集器标记到达事件，使用off('markReach')取消订阅事件。 7. （可选）使用on('markReach')方法订阅采集器标记到达事件，使用off('markReach')取消订阅事件。
...@@ -202,12 +201,13 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以 ...@@ -202,12 +201,13 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以
注册markReach监听后，当采集器采集的帧数到达设定值时，会触发回调并返回设定的值。 注册markReach监听后，当采集器采集的帧数到达设定值时，会触发回调并返回设定的值。
```js ```js
audioCapturer.on('markReach', (reachNumber) => { async markReach(){
console.info('Mark reach event Received'); this.audioCapturer.on('markReach', 10, (reachNumber) => {
console.info(`The Capturer reached frame: ${reachNumber}`); console.info('Mark reach event Received');
}); console.info(`The Capturer reached frame: ${reachNumber}`);
});
audioCapturer.off('markReach'); // 取消markReach事件的订阅，后续将无法监听到“标记到达”事件 this.audioCapturer.off('markReach'); // 取消markReach事件的订阅，后续将无法监听到“标记到达”事件
}
``` ```
8. （可选）使用on('periodReach')方法订阅采集器区间标记到达事件，使用off('periodReach')取消订阅事件。 8. （可选）使用on('periodReach')方法订阅采集器区间标记到达事件，使用off('periodReach')取消订阅事件。
...@@ -215,40 +215,43 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以 ...@@ -215,40 +215,43 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以
注册periodReach监听后，**每当**采集器采集的帧数到达设定值时，会触发回调并返回设定的值。 注册periodReach监听后，**每当**采集器采集的帧数到达设定值时，会触发回调并返回设定的值。
```js ```js
audioCapturer.on('periodReach', (reachNumber) => { async periodReach(){
console.info('Period reach event Received'); this.audioCapturer.on('periodReach', 10, (reachNumber) => {
console.info(`In this period, the Capturer reached frame: ${reachNumber}`); console.info('Period reach event Received');
}); console.info(`In this period, the Capturer reached frame: ${reachNumber}`);
});
audioCapturer.off('periodReach'); // 取消periodReach事件的订阅，后续将无法监听到“区间标记到达”事件 this.audioCapturer.off('periodReach'); // 取消periodReach事件的订阅，后续将无法监听到“区间标记到达”事件
}
``` ```
9. 如果应用需要在采集器状态更新时进行一些操作，可以订阅该事件，当采集器状态更新时，会受到一个包含有事件类型的回调。 9. 如果应用需要在采集器状态更新时进行一些操作，可以订阅该事件，当采集器状态更新时，会受到一个包含有事件类型的回调。
```js ```js
audioCapturer.on('stateChange', (state) => { async stateChange(){
console.info(`AudioCapturerLog: Changed State to : ${state}`) this.audioCapturer.on('stateChange', (state) => {
switch (state) { console.info(`AudioCapturerLog: Changed State to : ${state}`)
case audio.AudioState.STATE_PREPARED: switch (state) {
console.info('--------CHANGE IN AUDIO STATE----------PREPARED--------------'); case audio.AudioState.STATE_PREPARED:
console.info('Audio State is : Prepared'); console.info('--------CHANGE IN AUDIO STATE----------PREPARED--------------');
break; console.info('Audio State is : Prepared');
case audio.AudioState.STATE_RUNNING: break;
console.info('--------CHANGE IN AUDIO STATE----------RUNNING--------------'); case audio.AudioState.STATE_RUNNING:
console.info('Audio State is : Running'); console.info('--------CHANGE IN AUDIO STATE----------RUNNING--------------');
break; console.info('Audio State is : Running');
case audio.AudioState.STATE_STOPPED: break;
console.info('--------CHANGE IN AUDIO STATE----------STOPPED--------------'); case audio.AudioState.STATE_STOPPED:
console.info('Audio State is : stopped'); console.info('--------CHANGE IN AUDIO STATE----------STOPPED--------------');
break; console.info('Audio State is : stopped');
case audio.AudioState.STATE_RELEASED: break;
console.info('--------CHANGE IN AUDIO STATE----------RELEASED--------------'); case audio.AudioState.STATE_RELEASED:
console.info('Audio State is : released'); console.info('--------CHANGE IN AUDIO STATE----------RELEASED--------------');
break; console.info('Audio State is : released');
default: break;
console.info('--------CHANGE IN AUDIO STATE----------INVALID--------------'); default:
console.info('Audio State is : invalid'); console.info('--------CHANGE IN AUDIO STATE----------INVALID--------------');
break; console.info('Audio State is : invalid');
} break;
}); }
});
}
``` ```
\ No newline at end of file
zh-cn/application-dev/reference/apis/js-apis-audio.md
浏览文件 @ eb65b5aa
...@@ -4533,15 +4533,15 @@ let filePath = path + '/StarWars10s-2C-48000-4SW.wav'; ...@@ -4533,15 +4533,15 @@ let filePath = path + '/StarWars10s-2C-48000-4SW.wav';
let file = fs.openSync(filePath, fs.OpenMode.READ_ONLY); let file = fs.openSync(filePath, fs.OpenMode.READ_ONLY);
let stat = await fs.stat(path); let stat = await fs.stat(path);
let buf = new ArrayBuffer(bufferSize); let buf = new ArrayBuffer(bufferSize);
let len = stat.size % this.bufferSize == 0 ? Math.floor(stat.size / this.bufferSize) : Math.floor(stat.size / this.bufferSize + 1); let len = stat.size % bufferSize == 0 ? Math.floor(stat.size / bufferSize) : Math.floor(stat.size / bufferSize + 1);
for (let i = 0;i < len; i++) { for (let i = 0;i < len; i++) {
let options = { let options = {
offset: i * this.bufferSize, offset: i * bufferSize,
length: this.bufferSize length: bufferSize
} }
let readsize = await fs.read(file.fd, buf, options) let readsize = await fs.read(file.fd, buf, options)
let writeSize = await new Promise((resolve,reject)=>{ let writeSize = await new Promise((resolve,reject)=>{
this.audioRenderer.write(buf,(err,writeSize)=>{ audioRenderer.write(buf,(err,writeSize)=>{
if(err){ if(err){
reject(err) reject(err)
}else{ }else{
...@@ -4586,15 +4586,15 @@ let filePath = path + '/StarWars10s-2C-48000-4SW.wav'; ...@@ -4586,15 +4586,15 @@ let filePath = path + '/StarWars10s-2C-48000-4SW.wav';
let file = fs.openSync(filePath, fs.OpenMode.READ_ONLY); let file = fs.openSync(filePath, fs.OpenMode.READ_ONLY);
let stat = await fs.stat(path); let stat = await fs.stat(path);
let buf = new ArrayBuffer(bufferSize); let buf = new ArrayBuffer(bufferSize);
let len = stat.size % this.bufferSize == 0 ? Math.floor(stat.size / this.bufferSize) : Math.floor(stat.size / this.bufferSize + 1); let len = stat.size % bufferSize == 0 ? Math.floor(stat.size / bufferSize) : Math.floor(stat.size / bufferSize + 1);
for (let i = 0;i < len; i++) { for (let i = 0;i < len; i++) {
let options = { let options = {
offset: i * this.bufferSize, offset: i * bufferSize,
length: this.bufferSize length: bufferSize
} }
let readsize = await fs.read(file.fd, buf, options) let readsize = await fs.read(file.fd, buf, options)
try{ try{
let writeSize = await this.audioRenderer.write(buf); let writeSize = await audioRenderer.write(buf);
} catch(err) { } catch(err) {
console.error(`audioRenderer.write err: ${err}`); console.error(`audioRenderer.write err: ${err}`);
} }
......
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