HarmonyOS 鸿蒙Next SoundPool播放音频无声音

参考如下代码：

import audio from '[@ohos](/user/ohos).multimedia.audio';
import media from '[@ohos](/user/ohos).multimedia.media';
import fs from '[@ohos](/user/ohos).file.fs'
import picker from '[@ohos](/user/ohos).file.picker';
import { BusinessError } from '[@ohos](/user/ohos).base';
import { common } from '[@kit](/user/kit).AbilityKit';
let urii: string = '';
let soundPool: media.SoundPool;
let streamId: number = 0;
const audioSelectOptions = new picker.AudioSelectOptions();
let soundId: number = 0;
let audioRendererInfo: audio.AudioRendererInfo = {
usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
rendererFlags: 1
}
let PlayParameters: media.PlayParameters = {
loop: 3, // 循环4次
rate: audio.AudioRendererRate.RENDER_RATE_NORMAL, // 正常倍速
leftVolume: 0.9, // range = 0.0-1.0
rightVolume: 0.9, // range = 0.0-1.0
priority: 3, // 最低优先级
}
let uri: string = "";
[@Entry](/user/Entry)
[@Component](/user/Component)
struct NormalCapturer {
[@State](/user/State) message: string = '播放音频';
async aboutToAppear(): Promise<void> {
create();
}
async aboutToDisappear() {
release();
}
build() {
Row() {
Column() {
Text(this.message)
.fontSize(50)
.fontWeight(FontWeight.Bold)
Button('播放音频').onClick((event: ClickEvent) => {
PlaySoundPool();
})
}
.width('100%')
}
.height('100%')
}
}
async function loadCallback() {
// 加载完成回调
soundPool.on('loadComplete', (soundId_: number) => {
console.info('loadComplete, soundId: ' + soundId_);
})
}
//设置播放完成监听
async function finishPlayCallback() {
// 播放完成回调
soundPool.on('playFinished', () => {
console.info("recive play finished message");
// 可进行下次播放
})
}
//设置错误类型监听
function setErrorCallback() {
soundPool.on('error', (error) => {
console.info('error happened,message is :' + error.message);
})
}
async function PlaySoundPool() {
console.log("开始播放");
// 开始播放,这边play也可带播放播放的参数PlayParameters
streamId = await soundPool.play(soundId,PlayParameters);
}
async function release() {
// 终止指定流的播放
soundPool.stop(streamId);
// 卸载音频资源
await soundPool.unload(soundId);
//关闭监听
setOffCallback();
// 释放SoundPool
await soundPool.release();
}
//关闭监听
function setOffCallback() {
soundPool.off('loadComplete');
soundPool.off('playFinished');
soundPool.off('error');
}
async function create() {
//创建soundPool实例
soundPool = await media.createSoundPool(5, audioRendererInfo);
console.log("音频类型为：" + audioRendererInfo.usage.valueOf())
//注册监听
loadCallback();
finishPlayCallback();
setErrorCallback();
// 加载音频资源
let context: common.UIAbilityContext = getContext() as common.UIAbilityContext;
let data = context.resourceManager.getRawFdSync('camera_shutter.mp3');
let sanboxPath = context.filesDir
console.log("沙箱路径：" + sanboxPath)
let filePath = context.tempDir + "/camera_shutter.mp3"
console.log("压缩文件路径：" + filePath)
let dest = fs.openSync(filePath, fs.OpenMode.CREATE | fs.OpenMode.READ_WRITE)
let bufsize = 4096
let buf = new ArrayBuffer(bufsize)
let off = 0, len = 0, readedLen = 0
/**
* 通过buffer将rawfile文件内容copy到沙箱路径
*/
while (len = fs.readSync(data.fd, buf, { offset: data.offset + off, length: bufsize })) {
readedLen += len
fs.writeSync(dest.fd, buf, { offset: off, length: len })
off = off + len
if ((data.length - readedLen) < bufsize) {
bufsize = data.length - readedLen
}
}
fs.close(dest.fd)
context.resourceManager.closeRawFd("audio4Test.mp4", (err, data) => {
console.log("closeRawFd start")
if (err != null) {
console.log(err.message)
} else {
console.log("close success")
}
})
await fs.open(filePath, fs.OpenMode.READ_ONLY).then((file_: fs.File) => {
let file = file_;
console.info("file fd: " + file.fd);
uri = 'fd://' + (file.fd).toString()
});
soundPool.load(uri).then((soundIdd: number) => {
console.info('soundPool load uri success');
soundId = soundIdd;
}).catch((err: BusinessError) => {
console.error('soundPool load failed and catch error is ' + err.message);
})
}