android硬编码h264-MediaCodec

16lz 2021-01-24

分类：笔记音视频学习过程音视频 2013-12-26 15:40 5623人阅读评论(13) 收藏举报
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：

[java] view plain copy

<spanstyle="font-size:18px;">packagecom.encode.androidencode;

importjava.nio.ByteBuffer;

importandroid.annotation.SuppressLint;

importandroid.media.MediaCodec;

importandroid.media.MediaCodecInfo;

importandroid.media.MediaFormat;

importandroid.util.Log;

publicclassAvcEncoder

{

privateMediaCodecmediaCodec;

intm_width;

intm_height;

byte[]m_info=null;

privatebyte[]yuv420=null;

@SuppressLint("NewApi")

publicAvcEncoder(intwidth,intheight,intframerate,intbitrate){

m_width=width;

m_height=height;

yuv420=newbyte[widthheight3/2];

mediaCodec=MediaCodec.createEncoderByType("video/avc");

MediaFormatmediaFormat=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")

publicvoidclose(){

try{

mediaCodec.stop();

mediaCodec.release();

}catch(Exceptione){

e.printStackTrace();

}

}

@SuppressLint("NewApi")

publicintofferEncoder(byte[]input,byte[]output)

{

intpos=0;

swapYV12toI420(input,yuv420,m_width,m_height);

try{

ByteBuffer[]inputBuffers=mediaCodec.getInputBuffers();

ByteBuffer[]outputBuffers=mediaCodec.getOutputBuffers();

intinputBufferIndex=mediaCodec.dequeueInputBuffer(-1);

if(inputBufferIndex>=0)

{

ByteBufferinputBuffer=inputBuffers[inputBufferIndex];

inputBuffer.clear();

inputBuffer.put(yuv420);

mediaCodec.queueInputBuffer(inputBufferIndex,0,yuv420.length,0,0);

}

MediaCodec.BufferInfobufferInfo=newMediaCodec.BufferInfo();

intoutputBufferIndex=mediaCodec.dequeueOutputBuffer(bufferInfo,0);

while(outputBufferIndex>=0)

{

ByteBufferoutputBuffer=outputBuffers[outputBufferIndex];

byte[]outData=newbyte[bufferInfo.size];

outputBuffer.get(outData);

if(m_info!=null)

{

System.arraycopy(outData,0,output,pos,outData.length);

pos+=outData.length;

}

else//保存ppssps只有开始时第一个帧里有，保存起来后面用

{

ByteBufferspsPpsBuffer=ByteBuffer.wrap(outData);

if(spsPpsBuffer.getInt()==0x00000001)

{

m_info=newbyte[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)//keyframe编码器生成关键帧时只有0000000165没有ppssps，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(Throwablet){

t.printStackTrace();

}

returnpos;

}

//yv12转yuv420pyvu->yuv

privatevoidswapYV12toI420(byte[]yv12bytes,byte[]i420bytes,intwidth,intheight)

{

System.arraycopy(yv12bytes,0,i420bytes,0,widthheight);

System.arraycopy(yv12bytes,widthheight+widthheight/4,i420bytes,widthheight,widthheight/4);

System.arraycopy(yv12bytes,widthheight,i420bytes,widthheight+widthheight/4,widthheight/4);

}

}

</span>

[java] view plain copy

<spanstyle="font-size:18px;">packagecom.interfaces.androidencode;

importjava.io.IOException;

importjava.net.DatagramPacket;

importjava.net.DatagramSocket;

importjava.net.InetAddress;

importjava.net.SocketException;

importjava.net.UnknownHostException;

importjava.util.List;

importandroid.graphics.ImageFormat;

importandroid.hardware.Camera;

importandroid.hardware.Camera.PreviewCallback;

importandroid.os.Bundle;

importandroid.os.StrictMode;

importandroid.annotation.SuppressLint;

importandroid.app.Activity;

importandroid.util.Log;

importandroid.view.Menu;

importandroid.view.SurfaceHolder;

importandroid.view.SurfaceHolder.Callback;

importandroid.view.SurfaceView;

importcom.encode.androidencode.AvcEncoder;

publicclassMainActivityextendsActivity

implementsSurfaceHolder.Callback,PreviewCallback

{

DatagramSocketsocket;

InetAddressaddress;

AvcEncoderavcCodec;

publicCameram_camera;

SurfaceViewm_prevewview;

SurfaceHolderm_surfaceHolder;

intwidth=1280;

intheight=720;

intframerate=20;

intbitrate=2500000;

byte[]h264=newbyte[widthheight*3/2];

@SuppressLint("NewApi")

@Override

protectedvoidonCreate(BundlesavedInstanceState){

StrictMode.setThreadPolicy(newStrictMode.ThreadPolicy.Builder()

.detectDiskReads()

.detectDiskWrites()

.detectAll()//or.detectAll()foralldetectableproblems

.penaltyLog()

.build());

StrictMode.setVmPolicy(newStrictMode.VmPolicy.Builder()

.detectLeakedSqlLiteObjects()

.detectLeakedClosableObjects()

.penaltyLog()

.penaltyDeath()

.build());

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

avcCodec=newAvcEncoder(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=newDatagramSocket();

address=InetAddress.getByName("192.168.12.124");

}catch(SocketExceptione){

//TODOAuto-generatedcatchblock

e.printStackTrace();

}catch(UnknownHostExceptione){

//TODOAuto-generatedcatchblock

e.printStackTrace();

}

}

@Override

publicbooleanonCreateOptionsMenu(Menumenu){

//Inflatethemenu;thisaddsitemstotheactionbarifitispresent.

getMenuInflater().inflate(R.menu.main,menu);

returntrue;

}

@Override

publicvoidsurfaceChanged(SurfaceHolderarg0,intarg1,intarg2,intarg3)

{

}

@SuppressLint("NewApi")

@SuppressWarnings("deprecation")

@Override

publicvoidsurfaceCreated(SurfaceHolderarg0)

{

try

{

m_camera=Camera.open();

m_camera.setPreviewDisplay(m_surfaceHolder);

Camera.Parametersparameters=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(IOExceptione)

{

e.printStackTrace();

}

}

@Override

publicvoidsurfaceDestroyed(SurfaceHolderarg0)

{

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();

}

@Override

publicvoidonPreviewFrame(byte[]data,Cameracamera)

{

Log.v("h264","h264start");

intret=avcCodec.offerEncoder(data,h264);

if(ret>0)

{

try{

DatagramPacketpacket=newDatagramPacket(h264,ret,address,5000);

socket.send(packet);

}catch(IOExceptione)

{

}

}

Log.v("h264","h264end");

}

}

</span>

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

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