public boolean Start() {
mExtractor = new MediaExtractor();
try {
mExtractor.setDataSource(Environment.getExternalStorageDirectory() + "/8000PCM16.mp3");
mExtractor.selectTrack(0);
MediaFormat inputFormat = mExtractor.getTrackFormat(0);// 设置轨道0
if (!inputFormat.getString(MediaFormat.KEY_MIME).startsWith("audio")) {
LUtils.e(TAG, "not audio");
return false;
}
mDecoder = MediaCodec.createDecoderByType(inputFormat.getString(MediaFormat.KEY_MIME));
mDecoder.configure(inputFormat, null, null, 0);
mDecoder.start();
} catch (IOException e) {
e.printStackTrace();
}
super.start();
LUtils.d(TAG, "Start=====");
return true;
}
public void run() {
ByteBuffer[] inputBuffers = mDecoder.getInputBuffers();
ByteBuffer[] outputBuffers = mDecoder.getOutputBuffers();
MediaCodec.BufferInfo info = new MediaCodec.BufferInfo(); //缓冲区
// info.size = 640; //设置output buffer 的大小
while (true) {
int inIndex = mDecoder.dequeueInputBuffer(TIMEOUT_US);
if (inIndex >= 0) {
ByteBuffer buffer = inputBuffers[inIndex];
//从MediaExtractor中读取一帧待解的数据
int sampleSize = mExtractor.readSampleData(buffer, 0);
//小于0 代表所有数据已读取完成
if (sampleSize < 0) {
Log.d(TAG, "InputBuffer BUFFER_FLAG_END_OF_STREAM");
mDecoder.queueInputBuffer(inIndex, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
} else {
//插入一帧待解码的数据
mDecoder.queueInputBuffer(inIndex, 0, sampleSize, mExtractor.getSampleTime(), 0);
//MediaExtractor移动到下一取样处
mExtractor.advance();
}
}
int outIndex = mDecoder.dequeueOutputBuffer(info, TIMEOUT_US);
Log.i(TAG, "1111run: info.size" + info.size);
Log.i(TAG, "1111run: info.flags" + info.flags);
switch (outIndex) {
case MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED:
outputBuffers = mDecoder.getOutputBuffers();
break;
case MediaCodec.INFO_OUTPUT_FORMAT_CHANGED:
// MediaFormat format = mDecoder.getOutputFormat();
// audioTrack.setPlaybackRate(format.getInteger(MediaFormat.KEY_SAMPLE_RATE));
break;
case MediaCodec.INFO_TRY_AGAIN_LATER:
break;
default:
ByteBuffer outBuffer = outputBuffers[outIndex];
//BufferInfo内定义了此数据块的大小
final byte[] chunk = new byte[info.size];
Log.i(TAG, "run: info.size" + info.size);
// createFileWithByte(chunk);
//将Buffer内的数据取出到字节数组中
outBuffer.get(chunk);
//数据取出后一定记得清空此Buffer MediaCodec是循环使用这些Buffer的，不清空下次会得到同样的数据
outBuffer.clear();
try {
//TODO 在这里处理解码后的数据
//将解码出来的PCM数据IO流存入本地文件。
//fos.write(chunk);
int vnum;
if (chunk.length % 640 == 0) {
// // ==0
vnum = chunk.length / 640;
} else {
vnum = chunk.length / 640 + 1;
}
byte[] bytes = new byte[640];
for (int v = 0; v < vnum; v++) {
if (v != vnum - 1) {
//1 初始数据 2 从元数据的起始位置开始 3 目标数组 4 目标数组的开始起始位置 5 要copy的数组的长度
System.arraycopy(chunk, v * 640, bytes, 0, 640);
} else {
System.arraycopy(chunk, v * 640, bytes, 0, chunk.length - v * 640);
LUtils.d(TAG, "buffer.length - v * 640=====" + (chunk.length - v * 640));
}
LUtils.d(TAG, "buffer.length=====" + bytes.length);
LUtils.d(TAG, "buffer.length=====" + Arrays.toString(bytes));
FunSupport.getInstance().requestDeviceSendTalkData(
mFunDevice, bytes, bytes.length);
Log.d(TAG, "1111111111111111111" + Arrays.toString(bytes));
Log.d(TAG, "1111111111111111111=========" + bytes.length);
}
} catch (Exception e) {
e.printStackTrace();
}
//此操作一定要做，不然MediaCodec用完所有的Buffer后 将不能向外输出数据
mDecoder.releaseOutputBuffer(outIndex, false);
break;
}
if (info.flags != 0) {
Log.i(TAG, "解码完毕++++++++++++++");
break;
}
}
}