android硬编码h264-MediaCodec

本人对android已无大爱，更新太快，就h264编码先后实现了 ffmpeg+x264软编  Mediarecoder提取，还没能稳定的又出了MediaCodec，更新太快。更新快也是好事，说明android生命力旺盛。

既然瞅了几眼，就发出来个测试版本吧。android编码h264， 用udp发送到vlc播放测试。代码上传至：http://download.csdn.net/detail/liuhongxiangm/6772629

上代码：

package com.encode.androidencode;import java.nio.ByteBuffer;import android.annotation.SuppressLint;import android.media.MediaCodec;import android.media.MediaCodecInfo;import android.media.MediaFormat;import android.util.Log;public class AvcEncoder {private MediaCodec mediaCodec;int m_width;int m_height;byte[] m_info = null;private byte[] yuv420 = null; @SuppressLint("NewApi")public AvcEncoder(int width, int height, int framerate, int bitrate) { m_width  = width;m_height = height;yuv420 = new byte[width*height*3/2];    mediaCodec = MediaCodec.createEncoderByType("video/avc");    MediaFormat mediaFormat = MediaFormat.createVideoFormat("video/avc", width, height);    mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, bitrate);    mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, framerate);    mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar);        mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 1); //关键帧间隔时间 单位s        mediaCodec.configure(mediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);    mediaCodec.start();}@SuppressLint("NewApi")public void close() {    try {        mediaCodec.stop();        mediaCodec.release();    } catch (Exception e){         e.printStackTrace();    }}@SuppressLint("NewApi")public int offerEncoder(byte[] input, byte[] output) {int pos = 0;swapYV12toI420(input, yuv420, m_width, m_height);    try {        ByteBuffer[] inputBuffers = mediaCodec.getInputBuffers();        ByteBuffer[] outputBuffers = mediaCodec.getOutputBuffers();        int inputBufferIndex = mediaCodec.dequeueInputBuffer(-1);        if (inputBufferIndex >= 0)         {            ByteBuffer inputBuffer = inputBuffers[inputBufferIndex];            inputBuffer.clear();            inputBuffer.put(yuv420);            mediaCodec.queueInputBuffer(inputBufferIndex, 0, yuv420.length, 0, 0);        }        MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();        int outputBufferIndex = mediaCodec.dequeueOutputBuffer(bufferInfo,0);               while (outputBufferIndex >= 0)         {            ByteBuffer outputBuffer = outputBuffers[outputBufferIndex];            byte[] outData = new byte[bufferInfo.size];            outputBuffer.get(outData);                        if(m_info != null)            {                        System.arraycopy(outData, 0,  output, pos, outData.length);             pos += outData.length;                        }                        else //保存pps sps 只有开始时 第一个帧里有， 保存起来后面用            {             ByteBuffer spsPpsBuffer = ByteBuffer.wrap(outData);                   if (spsPpsBuffer.getInt() == 0x00000001)                  {                   m_info = new byte[outData.length];                 System.arraycopy(outData, 0, m_info, 0, outData.length);                 }                  else                  {                          return -1;                 }              }                        mediaCodec.releaseOutputBuffer(outputBufferIndex, false);            outputBufferIndex = mediaCodec.dequeueOutputBuffer(bufferInfo, 0);        }        if(output[4] == 0x65) //key frame   编码器生成关键帧时只有 00 00 00 01 65 没有pps sps， 要加上        {        System.arraycopy(output, 0,  yuv420, 0, pos);        System.arraycopy(m_info, 0,  output, 0, m_info.length);        System.arraycopy(yuv420, 0,  output, m_info.length, pos);        pos += m_info.length;        }            } catch (Throwable t) {        t.printStackTrace();    }    return pos;} //yv12 转 yuv420p  yvu -> yuv    private void swapYV12toI420(byte[] yv12bytes, byte[] i420bytes, int width, int height)     {          System.arraycopy(yv12bytes, 0, i420bytes, 0,width*height);    System.arraycopy(yv12bytes, width*height+width*height/4, i420bytes, width*height,width*height/4);    System.arraycopy(yv12bytes, width*height, i420bytes, width*height+width*height/4,width*height/4);      }  }

package com.interfaces.androidencode;import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;import java.net.SocketException;import java.net.UnknownHostException;import java.util.List;import android.graphics.ImageFormat;import android.hardware.Camera;import android.hardware.Camera.PreviewCallback;import android.os.Bundle;import android.os.StrictMode;import android.annotation.SuppressLint;import android.app.Activity;import android.util.Log;import android.view.Menu;import android.view.SurfaceHolder;import android.view.SurfaceHolder.Callback;import android.view.SurfaceView;import com.encode.androidencode.AvcEncoder;public class MainActivity extends Activityimplements SurfaceHolder.Callback, PreviewCallback {DatagramSocket socket;InetAddress address;AvcEncoder avcCodec;    public Camera m_camera;      SurfaceView   m_prevewview;    SurfaceHolder m_surfaceHolder;    int width = 1280;    int height = 720;    int framerate = 20;    int bitrate = 2500000;        byte[] h264 = new byte[width*height*3/2];@SuppressLint("NewApi")@Overrideprotected void onCreate(Bundle savedInstanceState) {StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()        .detectDiskReads()        .detectDiskWrites()        .detectAll()   // or .detectAll() for all detectable problems        .penaltyLog()        .build());StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()        .detectLeakedSqlLiteObjects()        .detectLeakedClosableObjects()        .penaltyLog()        .penaltyDeath()        .build());super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);avcCodec = new AvcEncoder(width,height,framerate,bitrate);m_prevewview = (SurfaceView) findViewById(R.id.SurfaceViewPlay);m_surfaceHolder = m_prevewview.getHolder(); // 绑定SurfaceView，取得SurfaceHolder对象m_surfaceHolder.setFixedSize(width, height); // 预览大小設置m_surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);m_surfaceHolder.addCallback((Callback) this);try {socket = new DatagramSocket();address = InetAddress.getByName("192.168.12.124");} catch (SocketException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (UnknownHostException e) {// TODO Auto-generated catch blocke.printStackTrace();}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {}@SuppressLint("NewApi")@SuppressWarnings("deprecation")@Overridepublic void surfaceCreated(SurfaceHolder arg0) {try {m_camera = Camera.open();m_camera.setPreviewDisplay(m_surfaceHolder);Camera.Parameters parameters = m_camera.getParameters();parameters.setPreviewSize(width, height);parameters.setPictureSize(width, height);parameters.setPreviewFormat(ImageFormat.YV12);m_camera.setParameters(parameters);m_camera.setPreviewCallback((PreviewCallback) this);m_camera.startPreview();} catch (IOException e) {e.printStackTrace();}}@Overridepublic void surfaceDestroyed(SurfaceHolder arg0) {m_camera.setPreviewCallback(null); //！！这个必须在前，不然退出出错m_camera.stopPreview(); m_camera.release();m_camera = null; avcCodec.close();}@Overridepublic void onPreviewFrame(byte[] data, Camera camera) {Log.v("h264", "h264 start");int ret = avcCodec.offerEncoder(data,h264);if(ret > 0){try {DatagramPacket packet=new DatagramPacket(h264,ret, address,5000);socket.send(packet);} catch (IOException e){}}Log.v("h264", "h264 end");}}

vlc的设置：设置里面的去复用器设置成H264的就好了，然后打开网络串流：udp://@:5000 就好了