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提交 875124ea 编写于 作者: W wusongqing
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updated docs 

Signed-off-by: Nwusongqing <wusongqing@huawei.com>
上级 092e6f35
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Showing with 281 addition and 290 deletion
en/application-dev/media/audio-recorder.md
浏览文件 @ 875124ea
......@@ -25,49 +25,46 @@ The full audio recording process includes creating an instance, setting recordin
```js
import media from '@ohos.multimedia.media'
import mediaLibrary from '@ohos.multimedia.mediaLibrary'
export class AudioRecorderDemo {
private testFdNumber; // Used to save the FD address.
// Set the callbacks related to audio recording.
setCallBack(audioRecorder) {
audioRecorder.on('prepare', () => { // Set the 'prepare' event callback.
console.log('prepare success');
audioRecorder.start(); // Call the start API to start recording and trigger the 'start' event callback.
let testFdNumber;
function SetCallBack(audioRecorder) {
audioRecorder.on('prepare', () => { // Set the 'prepare' event callback.
console.log('prepare success');
// The recording page is ready. You can click the Record button to start recording.
});
audioRecorder.on('start', () => { // Set the 'start' event callback.
console.log('audio recorder start success');
audioRecorder.pause(); // Call the pause API to pause recording and trigger the 'pause' event callback.
audioRecorder.on('start', () => { // Set the 'start' event callback.
console.log('audio recorder start success');
// The Record button is changed to the pausable state.
});
audioRecorder.on('pause', () => { // Set the 'pause' event callback.
console.log('audio recorder pause success');
audioRecorder.resume(); // Call the resume API to resume recording and trigger the 'resume' event callback.
audioRecorder.on('pause', () => { // Set the 'pause' event callback.
console.log('audio recorder pause success');
// The Record button is changed to the recordable state.
});
audioRecorder.on('resume', () => { // Set the 'resume' event callback.
console.log('audio recorder resume success');
audioRecorder.stop(); // Call the stop API to stop recording and trigger the 'stop' event callback.
audioRecorder.on('resume', () => { // Set the 'resume' event callback.
console.log('audio recorder resume success');
// The Record button is changed to the pausable state.
});
audioRecorder.on('stop', () => { // Set the 'stop' event callback.
console.log('audio recorder stop success');
audioRecorder.reset(); // Call the reset API to reset the recorder and trigger the 'reset' event callback.
audioRecorder.on('stop', () => { // Set the 'stop' event callback.
console.log('audio recorder stop success');
});
audioRecorder.on('reset', () => { // Set the 'reset' event callback.
console.log('audio recorder reset success');
audioRecorder.release(); // Call the release API to release resources and trigger the 'release' event callback.
audioRecorder.on('release', () => { // Set the 'release' event callback.
console.log('audio recorder release success');
});
audioRecorder.on('release', () => { // Set the 'release' event callback.
console.log('audio recorder release success');
audioRecorder = undefined;
audioRecorder.on('reset', () => { // Set the 'reset' event callback.
console.log('audio recorder reset success');
// You need to reset the recording parameters for another recording.
});
audioRecorder.on('error', (error) => { // Set the 'error' event callback.
console.info(`audio error called, errName is ${error.name}`);
console.info(`audio error called, errCode is ${error.code}`);
console.info(`audio error called, errMessage is ${error.message}`);
audioRecorder.on('error', (error) => { // Set the 'error' event callback.
console.info(`audio error called, errName is ${error.name}`);
console.info(`audio error called, errCode is ${error.code}`);
console.info(`audio error called, errMessage is ${error.message}`);
});
}
}
// pathName indicates the passed recording file name, for example, 01.mp3. The generated file address is /storage/media/100/local/files/Video/01.mp3.
// To use the media library, declare the following permissions: ohos.permission.MEDIA_LOCATION, ohos.permission.WRITE_MEDIA, and ohos.permission.READ_MEDIA.
async getFd(pathName) {
// pathName indicates the passed recording file name, for example, 01.mp3. The generated file address is /storage/media/100/local/files/Movies/01.mp3.
// To use the media library, declare the following permissions: ohos.permission.MEDIA_LOCATION, ohos.permission.WRITE_MEDIA, and ohos.permission.READ_MEDIA.
async function getFd(pathName) {
let displayName = pathName;
const mediaTest = mediaLibrary.getMediaLibrary();
let fileKeyObj = mediaLibrary.FileKey;
......@@ -75,37 +72,49 @@ export class AudioRecorderDemo {
let publicPath = await mediaTest.getPublicDirectory(mediaLibrary.DirectoryType.DIR_VIDEO);
let dataUri = await mediaTest.createAsset(mediaType, displayName, publicPath);
if (dataUri != undefined) {
let args = dataUri.id.toString();
let fetchOp = {
selections : fileKeyObj.ID + "=?",
selectionArgs : [args],
}
let fetchFileResult = await mediaTest.getFileAssets(fetchOp);
let fileAsset = await fetchFileResult.getAllObject();
let fdNumber = await fileAsset[0].open('Rw');
this.testFdNumber = "fd://" + fdNumber.toString();
let args = dataUri.id.toString();
let fetchOp = {
selections : fileKeyObj.ID + "=?",
selectionArgs : [args],
}
let fetchFileResult = await mediaTest.getFileAssets(fetchOp);
let fileAsset = await fetchFileResult.getAllObject();
let fdNumber = await fileAsset[0].open('Rw');
fdNumber = "fd://" + fdNumber.toString();
testFdNumber = fdNumber;
}
}
async audioRecorderDemo() {
// 1. Create an AudioRecorder instance.
let audioRecorder = media.createAudioRecorder();
// 2. Set the callbacks.
this.setCallBack(audioRecorder);
await this.getFd('01.mp3'); // Call the getFd method to obtain the FD address of the file to be recorded.
// 3. Set the recording parameters.
let audioRecorderConfig = {
audioEncodeBitRate : 22050,
audioSampleRate : 22050,
numberOfChannels : 2,
uri : this.testFdNumber, // testFdNumber is generated by getFd.
location : { latitude : 30, longitude : 130},
audioEncoderMime : media.CodecMimeType.AUDIO_AAC,
fileFormat : media.ContainerFormatType.CFT_MPEG_4A,
}
audioRecorder.prepare(audioRecorderConfig); // Call the prepare method to trigger the 'prepare' event callback.
}
}
await getFd('01.mp3');
// 1. Create an AudioRecorder instance.
let audioRecorder = media.createAudioRecorder();
// 2. Set the callbacks.
SetCallBack(audioRecorder);
// 3. Set the recording parameters.
let audioRecorderConfig = {
audioEncoder : media.AudioEncoder.AAC_LC ,
audioEncodeBitRate : 22050,
audioSampleRate : 22050,
numberOfChannels : 2,
format : media.AudioOutputFormat.AAC_ADTS,
uri : testFdNumber, // testFdNumber is generated by getFd.
location : { latitude : 30, longitude : 130},
}
audioRecorder.prepare(audioRecorderConfig);
// 4. Start recording.
audioRecorder.start(); // The start API can be called to trigger the 'start' event callback only after the 'prepare' event callback is complete.
// 5. Pause recording.
audioRecorder.pause(); // The pause API can be called to trigger the 'pause' event callback only after the 'start' event callback is complete.
// 6. Resume recording.
audioRecorder.resume(); // The resume API can be called to trigger the 'resume' event callback only after the 'pause' event callback is complete.
// 7. Stop recording.
audioRecorder.stop(); // The stop API can be called to trigger the 'stop' event callback only after the 'start' or 'resume' event callback is complete.
// 8. Reset recording.
audioRecorder.reset(); // The prepare API can be called for another recording only after the 'reset' event callback is complete.
// 9. Release resources.
audioRecorder.release(); // The AudioRecorder resource is destroyed.
audioRecorder = undefined;
```
### Normal Recording Scenario
......@@ -115,37 +124,29 @@ Unlike the full-process scenario, the normal recording scenario does not include
```js
import media from '@ohos.multimedia.media'
import mediaLibrary from '@ohos.multimedia.mediaLibrary'
export class AudioRecorderDemo {
private testFdNumber; // Used to save the FD address.
// Set the callbacks related to audio recording.
setCallBack(audioRecorder) {
audioRecorder.on('prepare', () => { // Set the 'prepare' event callback.
console.log('prepare success');
audioRecorder.start(); // Call the start API to start recording and trigger the 'start' event callback.
});
audioRecorder.on('start', () => { // Set the 'start' event callback.
console.log('audio recorder start success');
audioRecorder.stop(); // Call the stop API to stop recording and trigger the 'stop' event callback.
});
audioRecorder.on('stop', () => { // Set the 'stop' event callback.
console.log('audio recorder stop success');
audioRecorder.release(); // Call the release API to release resources and trigger the 'release' event callback.
});
audioRecorder.on('release', () => { // Set the 'release' event callback.
console.log('audio recorder release success');
audioRecorder = undefined;
});
audioRecorder.on('error', (error) => { // Set the 'error' event callback.
console.info(`audio error called, errName is ${error.name}`);
console.info(`audio error called, errCode is ${error.code}`);
console.info(`audio error called, errMessage is ${error.message}`);
let testFdNumber;
function SetCallBack(audioRecorder) {
audioRecorder.on('prepare', () => { // Set the 'prepare' event callback.
console.log('prepare success');
// The recording page is ready. You can click the Record button to start recording.
});
}
audioRecorder.on('start', () => { // Set the 'start' event callback.
console.log('audio recorder start success');
// The Record button is changed to the pausable state.
});
audioRecorder.on('stop', () => { // Set the 'stop' event callback.
console.log('audio recorder stop success');
});
audioRecorder.on('release', () => { // Set the 'release' event callback.
console.log('audio recorder release success');
});
}
// pathName indicates the passed recording file name, for example, 01.mp3. The generated file address is /storage/media/100/local/files/Video/01.mp3.
// To use the media library, declare the following permissions: ohos.permission.MEDIA_LOCATION, ohos.permission.WRITE_MEDIA, and ohos.permission.READ_MEDIA.
async getFd(pathName) {
// pathName indicates the passed recording file name, for example, 01.mp3. The generated file address is /storage/media/100/local/files/Movies/01.mp3.
// To use the media library, declare the following permissions: ohos.permission.MEDIA_LOCATION, ohos.permission.WRITE_MEDIA, and ohos.permission.READ_MEDIA.
async function getFd(pathName) {
let displayName = pathName;
const mediaTest = mediaLibrary.getMediaLibrary();
let fileKeyObj = mediaLibrary.FileKey;
......@@ -153,43 +154,41 @@ export class AudioRecorderDemo {
let publicPath = await mediaTest.getPublicDirectory(mediaLibrary.DirectoryType.DIR_VIDEO);
let dataUri = await mediaTest.createAsset(mediaType, displayName, publicPath);
if (dataUri != undefined) {
let args = dataUri.id.toString();
let fetchOp = {
selections : fileKeyObj.ID + "=?",
selectionArgs : [args],
}
let fetchFileResult = await mediaTest.getFileAssets(fetchOp);
let fileAsset = await fetchFileResult.getAllObject();
let fdNumber = await fileAsset[0].open('Rw');
this.testFdNumber = "fd://" + fdNumber.toString();
let args = dataUri.id.toString();
let fetchOp = {
selections : fileKeyObj.ID + "=?",
selectionArgs : [args],
}
let fetchFileResult = await mediaTest.getFileAssets(fetchOp);
let fileAsset = await fetchFileResult.getAllObject();
let fdNumber = await fileAsset[0].open('Rw');
fdNumber = "fd://" + fdNumber.toString();
testFdNumber = fdNumber;
}
}
async audioRecorderDemo() {
// 1. Create an AudioRecorder instance.
let audioRecorder = media.createAudioRecorder();
// 2. Set the callbacks.
this.setCallBack(audioRecorder);
await this.getFd('01.mp3'); // Call the getFd method to obtain the FD address of the file to be recorded.
// 3. Set the recording parameters.
let audioRecorderConfig = {
audioEncodeBitRate : 22050,
audioSampleRate : 22050,
numberOfChannels : 2,
uri : this.testFdNumber, // testFdNumber is generated by getFd.
location : { latitude : 30, longitude : 130},
audioEncoderMime : media.CodecMimeType.AUDIO_AAC,
fileFormat : media.ContainerFormatType.CFT_MPEG_4A,
}
audioRecorder.prepare(audioRecorderConfig); // Call the prepare method to trigger the 'prepare' event callback.
}
}
```
## Samples
The following samples are provided to help you better understand how to develop audio recording:
- [`Recorder`: Recorder (eTS, API 8)](https://gitee.com/openharmony/app_samples/tree/master/media/Recorder)
- [`eTsAudioPlayer`: Audio Player (eTS)](https://gitee.com/openharmony/app_samples/blob/master/media/Recorder/entry/src/main/ets/MainAbility/pages/Play.ets)
- [Audio Player](https://gitee.com/openharmony/codelabs/tree/master/Media/Audio_OH_ETS)
await getFd('01.mp3');
// 1. Create an AudioRecorder instance.
let audioRecorder = media.createAudioRecorder();
// 2. Set the callbacks.
SetCallBack(audioRecorder);
// 3. Set the recording parameters.
let audioRecorderConfig = {
audioEncoder : media.AudioEncoder.AAC_LC ,
audioEncodeBitRate : 22050,
audioSampleRate : 22050,
numberOfChannels : 2,
format : media.AudioOutputFormat.AAC_ADTS,
uri : testFdNumber, // testFdNumber is generated by getFd.
location : { latitude : 30, longitude : 130},
}
audioRecorder.prepare(audioRecorderConfig)
// 4. Start recording.
audioRecorder.start(); // The start API can be called to trigger the 'start' event callback only after the 'prepare' event callback is complete.
// 5. Stop recording.
audioRecorder.stop(); // The stop API can be called to trigger the 'stop' event callback only after the 'start' or 'resume' event callback is complete.
// 6. Release resources.
audioRecorder.release(); // The AudioRecorder resource is destroyed.
audioRecorder = undefined;
```
en/application-dev/reference/apis/js-apis-image.md
浏览文件 @ 875124ea
......@@ -1013,8 +1013,8 @@ Enumerates scale modes.
| Name | Default Value| Description |
| --------------- | ------ | -------------------------------------------------- |
| CENTER_CROP | 1 | Scales the image so that it fills the requested bounds of the target and crops the extra.|
| FIT_TARGET_SIZE | 2 | Reduces the image size to the dimensions of the target. |
| CENTER_CROP | 1 | The image is scaled in such a way that it fits the dimensions of the target and centered in the target. |
| FIT_TARGET_SIZE | 2 | The image size is reduced to fit the dimensions of the target. |
## InitializationOptions<sup>8+</sup>
......
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