AudioTrack本身只支持播放pcm格式音频，想要使用AudioTrack播放acc格式音频，还需要其他api来进行数据封装。

MediaExtractor

MediaCodec

package com.zero.demo;/**
* Created by yingkun_che on 19-6-19.
* 使用AudioTrack 播放acc音频测试
*/
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioTrack;
import android.media.MediaCodec;
import android.media.MediaCodec.BufferInfo;
import android.media.MediaExtractor;
import android.media.MediaFormat;
import android.util.Log;
import java.io.IOException;
import java.nio.ByteBuffer;public class AudioDecoderThread {private static final int TIMEOUT_US = 1000;private MediaExtractor mExtractor;private MediaCodec mDecoder;private boolean eosReceived;private int mSampleRate = 0;private final String TAG = "AACPlay";String accPath="/storage/emulated/0/Android/data/com.zero.demo/files/zero_editor_kuato/resources/themes/satura/Stratosphere.aac";public void startPlay(String path) throws IOException {eosReceived = false;//创建MediaExtractor对象用来解AAC封装mExtractor = new MediaExtractor();try {//设置需要MediaExtractor解析的文件的路径mExtractor.setDataSource(path);} catch (IOException e) {e.printStackTrace();}MediaFormat format = mExtractor.getTrackFormat(0);if (format == null){Log.e(TAG,"format is null");return;}//判断当前帧的文件类型是否为audioString mime = format.getString(MediaFormat.KEY_MIME);if (mime.startsWith("audio/")) {Log.d(TAG, "format : " + format);//获取当前帧的采样率mExtractor.selectTrack(0);mSampleRate = format.getInteger(MediaFormat.KEY_SAMPLE_RATE);//获取当前帧的通道数int channel  = format.getInteger(MediaFormat.KEY_CHANNEL_COUNT);//音频文件长度long duration = format.getLong(MediaFormat.KEY_DURATION);Log.d(TAG,"length:"+duration/1000000);}//创建MediaCodec对象mDecoder = MediaCodec.createDecoderByType(mime);//配置MediaCodecmDecoder.configure(format, null, null, 0);if (mDecoder == null) {Log.e(TAG, "Can't find video info!");return;}//启动MediaCodecmDecoder.start();new Thread(AACDecoderAndPlayRunnable).start();}Runnable AACDecoderAndPlayRunnable = new Runnable() {@Overridepublic void run() {AACDecoderAndPlay();}};private void AACDecoderAndPlay() {ByteBuffer[] inputBuffers = mDecoder.getInputBuffers();ByteBuffer[] outputBuffers = mDecoder.getOutputBuffers();BufferInfo info = new BufferInfo();int buffsize = AudioTrack.getMinBufferSize(mSampleRate, AudioFormat.CHANNEL_OUT_STEREO, AudioFormat.ENCODING_PCM_16BIT);// 创建AudioTrack对象AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, mSampleRate,AudioFormat.CHANNEL_OUT_STEREO,AudioFormat.ENCODING_PCM_16BIT,buffsize,AudioTrack.MODE_STREAM);//启动AudioTrackaudioTrack.play();int num=0;while (!eosReceived) {int inIndex = mDecoder.dequeueInputBuffer(TIMEOUT_US);if (inIndex >= 0) {ByteBuffer buffer = inputBuffers[inIndex];//从MediaExtractor中读取一帧待解数据int sampleSize = mExtractor.readSampleData(buffer, 0);if (sampleSize < 0) {// We shouldn't stop the playback at this point, just pass the EOS// flag to mDecoder, we will get it again from the// dequeueOutputBufferLog.d(TAG, "InputBuffer BUFFER_FLAG_END_OF_STREAM");mDecoder.queueInputBuffer(inIndex, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);} else {//向MediaDecoder输入一帧待解码数据mDecoder.queueInputBuffer(inIndex, 0, sampleSize, mExtractor.getSampleTime(), 0);mExtractor.advance();}//从MediaDecoder队列取出一帧解码后的数据int outIndex = mDecoder.dequeueOutputBuffer(info, TIMEOUT_US);if (info.size>0){Log.d(TAG, "INFO_OUTPUT_BUFFERS_CHANGED num: "+num);num=0;}else{num++;}switch (outIndex) {case MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED:Log.d(TAG, "INFO_OUTPUT_BUFFERS_CHANGED");outputBuffers = mDecoder.getOutputBuffers();break;case MediaCodec.INFO_OUTPUT_FORMAT_CHANGED:MediaFormat format = mDecoder.getOutputFormat();Log.d(TAG, "New format " + format);audioTrack.setPlaybackRate(format.getInteger(MediaFormat.KEY_SAMPLE_RATE));break;case MediaCodec.INFO_TRY_AGAIN_LATER:Log.d(TAG, "dequeueOutputBuffer timed out!");break;default:ByteBuffer outBuffer = outputBuffers[outIndex];//Log.v(TAG, "outBuffer: " + outBuffer);final byte[] chunk = new byte[info.size];// Read the buffer all at onceoutBuffer.get(chunk);//清空buffer,否则下一次得到的还会得到同样的bufferoutBuffer.clear();// AudioTrack write dataaudioTrack.write(chunk, info.offset, info.offset + info.size);mDecoder.releaseOutputBuffer(outIndex, false);//这一行必须加,因为在P上mDecoder.dequeueOutputBuffer 前面会有80次没有数据,需要释放缓冲区,否则无声音break;}// 所有帧都解码、播放完之后退出循环if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {Log.d(TAG, "OutputBuffer BUFFER_FLAG_END_OF_STREAM");break;}}}//释放MediaDecoder资源mDecoder.stop();mDecoder.release();mDecoder = null;//释放MediaExtractor资源mExtractor.release();mExtractor = null;//释放AudioTrack资源audioTrack.stop();audioTrack.release();audioTrack = null;}public void stop() {eosReceived = true;}
}