本文转自EasyDarwin团队Kim的博客：http://blog.csdn.net/jinlong0603/article/details/52963378
EasyRTMP Android版demo中，通过使用AudioRecord录音，然后将每一帧数据通过MediaCodec编码成LATM格式音频，然后就发送给服务器就OK了。
AudioRecord的使用
public void startRecord() {
try {
init();
mAudioRecord.startRecording();
mMediaCodec.start();
final ByteBuffer[] inputBuffers = mMediaCodec.getInputBuffers();
mThread = new Thread(new Runnable() {
@Override
public void run() {
Process.setThreadPriority(Process.THREAD_PRIORITY_AUDIO);
int len = 0, bufferIndex = 0;
try {
while (!Thread.interrupted() && !stoped) {
bufferIndex = mMediaCodec.dequeueInputBuffer(50000);
if (bufferIndex >= 0) {
inputBuffers[bufferIndex].clear();
len = mAudioRecord.read(inputBuffers[bufferIndex], BUFFER_SIZE);
if (len == AudioRecord.ERROR_INVALID_OPERATION || len == AudioRecord.ERROR_BAD_VALUE) {
mMediaCodec.queueInputBuffer(bufferIndex, 0, 0, 0, 0);
} else {
mMediaCodec.queueInputBuffer(bufferIndex, 0, len, 0, 0);
}
}
}
} catch (RuntimeException e) {
Log.i(TAG, "record" + e.getMessage());
}
}
}, "AACRecoder");
mThread.start();
startEncode();
} catch (Exception e) {
Log.e(TAG, "Record___Error!!!!!");
}
}在循环中通过mAudioRecord.read(inputBuffers[bufferIndex], BUFFER_SIZE)不断的读取音频，然后放入编码队列中去。 新开一个线程用来获取队列中的数据：
private void startEncode() {
mBuffers = mMediaCodec.getOutputBuffers();
mBuffer=null;
encodeThread = new Thread(new Runnable() {
@Override
public void run() {
while (!Thread.interrupted() && !stoped) {
try {
if (mBuffer == null) {
mBuffer = ByteBuffer.allocate(10240);
while (!Thread.currentThread().isInterrupted() && !stoped) {
mIndex = mMediaCodec.dequeueOutputBuffer(mBufferInfo, 50000);
if (mIndex >= 0) {
if (mBufferInfo.flags == MediaCodec.BUFFER_FLAG_CODEC_CONFIG) {
continue;
}
mBuffer.clear();
mBuffer.position(0);
mBuffers[mIndex].get(mBuffer.array(), 0, mBufferInfo.size);
mBuffers[mIndex].clear();
mBuffer.position(mBuffer.position() + mBufferInfo.size);
mBuffer.flip();
break;
} else if (mIndex == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
mBuffers = mMediaCodec.getOutputBuffers();
} else if (mIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
Log.v(TAG, "output format changed...");
} else if (mIndex == MediaCodec.INFO_TRY_AGAIN_LATER) {
Log.v(TAG, "No buffer available...");
} else {
Log.e(TAG, "Message: " + mIndex);
}
}
}
int size = mBufferInfo.size;
byte[] buffer = new byte[size];
mBuffer.get(buffer);
easyPusher.push(buffer,System.currentTimeMillis(), 0);
if (mBuffer.position() >= size) { // read complete
mMediaCodec.releaseOutputBuffer(mIndex, false);
mBuffer = null;
}
} catch (RuntimeException e) {
Log.i(TAG, "record" + e.getMessage());
}
}
}
}, "AACEncoder");
encodeThread.start();
}EasyRTMP推送RTMP流时不需要添加ADTS头部。而EasyPusher推送RTSP流需要添加ADTS。
EasyRTMP Github：https://github.com/EasyDarwin/EasyRTMP
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