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未验证 提交 398ed35c 编写于 作者: O openharmony_ci 提交者： Gitee
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!15529 翻译完成：14813+14537+14657+14624 示例代码修改GetBufferSize 

Merge pull request !15529 from wusongqing/TR14813
上级 73d5106d 4fa7e9d6
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en/application-dev/media/audio-capturer.md
浏览文件 @ 398ed35c
......@@ -21,7 +21,7 @@ This following figure shows the audio capturer state transitions.
## Constraints
Before developing the audio data collection feature, configure the **ohos.permission.MICROPHONE** permission for your application. For details about permission configuration, see [Permission Application Guide](../security/accesstoken-guidelines.md).
Before developing the audio data collection feature, configure the **ohos.permission.MICROPHONE** permission for your application. For details, see [Permission Application Guide](../security/accesstoken-guidelines.md).
## How to Develop
......@@ -72,7 +72,7 @@ For details about the APIs, see [AudioCapturer in Audio Management](../reference
}
await audioCapturer.start();
let state = audioCapturer.state;
state = audioCapturer.state;
if (state == audio.AudioState.STATE_RUNNING) {
console.info('AudioRecLog: Capturer started');
} else {
......@@ -86,7 +86,7 @@ For details about the APIs, see [AudioCapturer in Audio Management](../reference
The following example shows how to write recorded data into a file.
```js
import fileio from '@ohos.fileio';
import fs from '@ohos.file.fs';
let state = audioCapturer.state;
// The read operation can be performed only when the state is STATE_RUNNING.
......@@ -96,31 +96,36 @@ For details about the APIs, see [AudioCapturer in Audio Management](../reference
}
const path = '/data/data/.pulse_dir/capture_js.wav'; // Path for storing the collected audio file.
let fd = fileio.openSync(path, 0o102, 0o777);
if (fd !== null) {
console.info('AudioRecLog: file fd created');
}
else{
console.info('AudioRecLog: file fd create : FAILED');
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;
}
fd = fileio.openSync(path, 0o2002, 0o666);
if (fd !== null) {
console.info('AudioRecLog: file fd opened in append mode');
}
let numBuffersToCapture = 150; // Write data for 150 times.
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) {
console.info('AudioRecLog: read buffer failed');
} else {
let number = fileio.writeSync(fd, buffer);
let number = fs.writeSync(fd, buffer, options);
console.info(`AudioRecLog: data written: ${number}`);
}
numBuffersToCapture--;
count++;
}
```
......@@ -189,7 +194,7 @@ For details about the APIs, see [AudioCapturer in Audio Management](../reference
let audioTime : number = await audioCapturer.getAudioTime();
// Obtain a proper minimum buffer size.
let bufferSize : number = await audioCapturer.getBuffersize();
let bufferSize : number = await audioCapturer.getBufferSize();
```
7. (Optional) Use **on('markReach')** to subscribe to the mark reached event, and use **off('markReach')** to unsubscribe from the event.
......
en/application-dev/media/audio-renderer.md
浏览文件 @ 398ed35c
......@@ -34,8 +34,7 @@ For details about the APIs, see [AudioRenderer in Audio Management](../reference
1. 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.
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.
```js
import audio from '@ohos.multimedia.audio';
......@@ -82,15 +81,15 @@ Set parameters of the **AudioRenderer** instance in **audioRendererOptions**. Th
}
}
```
The renderer state will be **STATE_RUNNING** once the audio renderer is started. The application can then begin reading buffers.
The renderer state will be **STATE_RUNNING** once the audio renderer is started. The application can then begin reading buffers.
3. Call **write()** to write data to the buffer.
Read the audio data to be played to the buffer. Call **write()** repeatedly to write the data to the buffer.
```js
import fileio from '@ohos.fileio';
import fs from '@ohos.file.fs';
import audio from '@ohos.multimedia.audio';
async function writeBuffer(buf) {
......@@ -109,35 +108,33 @@ Set parameters of the **AudioRenderer** instance in **audioRendererOptions**. Th
// Set a proper buffer size for the audio renderer. You can also select a buffer of another size.
const bufferSize = await audioRenderer.getBufferSize();
let dir = globalThis.fileDir; // You must use the sandbox path.
const path = dir + '/file_example_WAV_2MG.wav'; // The file to render is in the following path: /data/storage/el2/base/haps/entry/files/file_example_WAV_2MG.wav
console.info(`file path: ${ path}`);
let ss = fileio.createStreamSync(path, 'r');
const totalSize = fileio.statSync(path).size; // Size of the file to render.
let discardHeader = new ArrayBuffer(bufferSize);
ss.readSync(discardHeader);
let rlen = 0;
rlen += bufferSize;
let id = setInterval(() => {
if (audioRenderer.state == audio.AudioState.STATE_RELEASED) { // The rendering stops if the audio renderer is in the STATE_RELEASED state.
ss.closeSync();
await audioRenderer.stop();
clearInterval(id);
}
if (audioRenderer.state == audio.AudioState.STATE_RUNNING) {
if (rlen >= totalSize) { // The rendering stops if the file finishes reading.
ss.closeSync();
await audioRenderer.stop();
clearInterval(id);
}
const filePath = dir + '/file_example_WAV_2MG.wav'; // The file to render is in the following path: /data/storage/el2/base/haps/entry/files/file_example_WAV_2MG.wav
console.info(`file filePath: ${ filePath}`);
let file = fs.openSync(filePath, fs.OpenMode.READ_ONLY);
let stat = await fs.stat(filePath); // Music file information.
let buf = new ArrayBuffer(bufferSize);
rlen += ss.readSync(buf);
console.info(`Total bytes read from file: ${rlen}`);
writeBuffer(buf);
} else {
console.info('check after next interval');
let len = stat.size % this.bufferSize == 0 ? Math.floor(stat.size / this.bufferSize) : Math.floor(stat.size / this.bufferSize + 1);
for (let i = 0;i < len; i++) {
let options = {
offset: i * this.bufferSize,
length: this.bufferSize
}
let readsize = await fs.read(file.fd, buf, options)
let writeSize = await new Promise((resolve,reject)=>{
this.audioRenderer.write(buf,(err,writeSize)=>{
if(err){
reject(err)
}else{
resolve(writeSize)
}
})
})
}
}, 30); // The timer interval is set based on the audio format. The unit is millisecond.
fs.close(file)
await audioRenderer.stop(); // Stop rendering.
await audioRenderer.release(); // Releases the resources.
```
4. (Optional) Call **pause()** or **stop()** to pause or stop rendering.
......@@ -242,7 +239,7 @@ Set parameters of the **AudioRenderer** instance in **audioRendererOptions**. Th
let audioTime : number = await audioRenderer.getAudioTime();
// Obtain a proper minimum buffer size.
let bufferSize : number = await audioRenderer.getBuffersize();
let bufferSize : number = await audioRenderer.getBufferSize();
// Obtain the audio renderer rate.
let renderRate : audio.AudioRendererRate = await audioRenderer.getRenderRate();
......@@ -424,35 +421,31 @@ Set parameters of the **AudioRenderer** instance in **audioRendererOptions**. Th
let dir = globalThis.fileDir; // You must use the sandbox path.
const path1 = dir + '/music001_48000_32_1.wav'; // The file to render is in the following path: /data/storage/el2/base/haps/entry/files/music001_48000_32_1.wav
console.info(`audioRender1 file path: ${ path1}`);
let ss1 = await fileio.createStream(path1,'r');
const totalSize1 = fileio.statSync(path1).size; // Size of the file to render.
console.info(`totalSize1 -------: ${totalSize1}`);
let discardHeader = new ArrayBuffer(bufferSize);
ss1.readSync(discardHeader);
let rlen = 0;
rlen += bufferSize;
let file1 = fs.openSync(path1, fs.OpenMode.READ_ONLY);
let stat = await fs.stat(path1); // Music file information.
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);
// 1.7 Render the original audio data in the buffer by using audioRender.
let id = setInterval(async () => {
if (audioRenderer1.state == audio.AudioState.STATE_RELEASED) { // The rendering stops if the audio renderer is in the STATE_RELEASED state.
ss1.closeSync();
audioRenderer1.stop();
clearInterval(id);
}
if (audioRenderer1.state == audio.AudioState.STATE_RUNNING) {
if (rlen >= totalSize1) { // The rendering stops if the file finishes reading.
ss1.closeSync();
await audioRenderer1.stop();
clearInterval(id);
for (let i = 0;i < len; i++) {
let options = {
offset: i * this.bufferSize,
length: this.bufferSize
}
let readsize = await fs.read(file.fd, buf, options)
let writeSize = await new Promise((resolve,reject)=>{
this.audioRenderer1.write(buf,(err,writeSize)=>{
if(err){
reject(err)
}else{
resolve(writeSize)
}
let buf = new ArrayBuffer(bufferSize);
rlen += ss1.readSync(buf);
console.info(`Total bytes read from file: ${rlen}`);
await writeBuffer(buf, that.audioRenderer1);
} else {
console.info('check after next interval');
})
})
}
}, 30); // The timer interval is set based on the audio format. The unit is millisecond.
fs.close(file1)
await audioRenderer1.stop(); // Stop rendering.
await audioRenderer1.release(); Releases the resources.
}
async runningAudioRender2(){
......@@ -499,36 +492,32 @@ Set parameters of the **AudioRenderer** instance in **audioRendererOptions**. Th
// 2.6 Read the original audio data file.
let dir = globalThis.fileDir; // You must use the sandbox path.
const path2 = dir + '/music002_48000_32_1.wav'; // The file to render is in the following path: /data/storage/el2/base/haps/entry/files/music002_48000_32_1.wav
console.error(`audioRender1 file path: ${ path2}`);
let ss2 = await fileio.createStream(path2,'r');
const totalSize2 = fileio.statSync(path2).size; // Size of the file to render.
console.error(`totalSize2 -------: ${totalSize2}`);
let discardHeader2 = new ArrayBuffer(bufferSize);
ss2.readSync(discardHeader2);
let rlen = 0;
rlen += bufferSize;
console.info(`audioRender2 file path: ${ path2}`);
let file2 = fs.openSync(path2, fs.OpenMode.READ_ONLY);
let stat = await fs.stat(path2); // Music file information.
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);
// 2.7 Render the original audio data in the buffer by using audioRender.
let id = setInterval(async () => {
if (audioRenderer2.state == audio.AudioState.STATE_RELEASED) { // The rendering stops if the audio renderer is in the STATE_RELEASED state.
ss2.closeSync();
that.audioRenderer2.stop();
clearInterval(id);
}
if (audioRenderer1.state == audio.AudioState.STATE_RUNNING) {
if (rlen >= totalSize2) { // The rendering stops if the file finishes reading.
ss2.closeSync();
await audioRenderer2.stop();
clearInterval(id);
for (let i = 0;i < len; i++) {
let options = {
offset: i * this.bufferSize,
length: this.bufferSize
}
let readsize = await fs.read(file.fd, buf, options)
let writeSize = await new Promise((resolve,reject)=>{
this.audioRenderer2.write(buf,(err,writeSize)=>{
if(err){
reject(err)
}else{
resolve(writeSize)
}
let buf = new ArrayBuffer(bufferSize);
rlen += ss2.readSync(buf);
console.info(`Total bytes read from file: ${rlen}`);
await writeBuffer(buf, that.audioRenderer2);
} else {
console.info('check after next interval');
})
})
}
}, 30); // The timer interval is set based on the audio format. The unit is millisecond.
fs.close(file2)
await audioRenderer2.stop(); // Stop rendering.
await audioRenderer2.release(); // Releases the resources.
}
async writeBuffer(buf, audioRender) {
......
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