android开发 h264传输,使用android低级别api解码H264流式传输

我在android中使用MediaCodec低级别Api来解​​码从IP CAMERA接收到的h264 raw stream。 来自IP摄像头的原始数据流，通过TCP/IP连接进行接收。使用android低级别api解码H264流式传输

为了解码流，我的代码是：

@Override

protected void onCreate(Bundle savedInstanceState) {

MediaCodec mCodecc;

MediaFormat mFormat;

BufferInfo mInfo;

ByteBuffer[] inputBuffers ;

ByteBuffer[] outputBuffers ;

}

protected void Init_Codec()

{

mCodecc = MediaCodec.createDecoderByType("video/avc");

mFormat = MediaFormat.createVideoFormat("video/avc", width, height);

mInfo = new BufferInfo();

mFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT,MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar);

mCodecc.configure(mFormat, holder.getSurface(), null,0);

}

protected void Start_Codec()

{

mCodecc.start();

inputBuffers = mCodecc.getInputBuffers();

outputBuffers = mCodecc.getOutputBuffers();

}

private void OnRawStreamReceived(final ByteBuffer buffer)

{

mHandler.postAtFrontOfQueue(new Runnable() {

@Override

public void run()

{

int inIndex = mCodecc.dequeueInputBuffer(10000);

if(inIndex>=0)

{

inputBuffers[inIndex] = buffer;

mCodecc.queueInputBuffer(inIndex, 0,buffer.limit(),System.currentTimeMillis(), 0);

}

int outIndex = mCodecc.dequeueOutputBuffer(mInfo, 10000);

switch (outIndex) {

case MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED:

Log.d("DecodeActivity", "INFO_OUTPUT_BUFFERS_CHANGED");

outputBuffers = mCodecc.getOutputBuffers();

break;

case MediaCodec.INFO_OUTPUT_FORMAT_CHANGED:

Log.d("DecodeActivity", "New format " + mCodecc.getOutputFormat());

break;

case MediaCodec.INFO_TRY_AGAIN_LATER:

Log.d("DecodeActivity", "dequeueOutputBuffer timed out! --- size : " + mInfo.size);

break;

default:

ByteBuffer buffer = outputBuffers[outIndex];

mCodecc.releaseOutputBuffer(outIndex, true);

break;

}

}

int outIndex = mCodecc.dequeueOutputBuffer(mInfo, 10000);

但在这行代码，我总是收到“-1”。和mInfo.size()也是我得到“0”。它不显示给定表面上的任何东西。

我错过了哪一步。请指导我。 thanx

2013-04-02

Arun