Android手机的h264硬编码测试

网上源码进行点小改动, 代码如下：

/**
 * oppo r7s(android 4.4.4)测试通过， 红米3(android 5.1.1)测试未通过
 * @author Administrator
 */
@SuppressLint("NewApi")
public class MainActivity extends Activity implements 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];

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		
		StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
        .detectDiskReads()
        .detectDiskWrites()
        .detectAll()  
        .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(); 
		m_surfaceHolder.setFixedSize(width, height);
		m_surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		m_surfaceHolder.addCallback((Callback) this);	
		
		try {
			socket = new DatagramSocket();
			address = InetAddress.getByName("192.168.1.101");
		} catch (SocketException e) {
			e.printStackTrace();
		} catch (UnknownHostException e) {
			e.printStackTrace();
		}
		
	}
	
	@Override
	public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
	
	}

	@Override
	public 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.setPreviewCallbackWithBuffer((PreviewCallback) this);
			m_camera.startPreview();
			
		} catch (IOException e){
			e.printStackTrace();
		}	
	}

	@Override
	public void surfaceDestroyed(SurfaceHolder arg0) {
		m_camera.setPreviewCallback(null); 
		m_camera.stopPreview(); 
		m_camera.release();
		m_camera = null; 
		avcCodec.close();
	}

	@Override
	public void onPreviewFrame(byte[] data, Camera camera) {
		Log.v("h264", "onPreviewFrame");
		int ret = avcCodec.offerEncoder(data, h264);
		if(ret > 0){
			try {	
				/**
				 * [vlc]
				 * 1. 工具->首选项->显示设置->全部->输入/编解码器->去复用器->右边：去复用模块 -> H264视频去复用器
				 * 2. 媒体->打开网络串流-> udp://@:5000
				 */
				DatagramPacket packet=new DatagramPacket(h264, ret, address,5000);
				socket.send(packet);
				Log.v("h264", "send packet");
			} catch (IOException e){
				Log.e("h264", "udp send err:"+e);
			}
		}else{
			Log.v("h264", "ret ="+ret);
		}
	}
}
@SuppressLint("InlinedApi")
class AvcEncoder {
	private MediaCodec mediaCodec;
	private int m_width;
	private int m_height;
	private byte[] m_info = null;
	private byte[] yuv420 = null; 
	private static boolean isRecognizedFormat(int colorFormat) {
        switch (colorFormat) {
            case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar:
            case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420PackedPlanar:
            case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar:
            case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420PackedSemiPlanar:
            case MediaCodecInfo.CodecCapabilities.COLOR_TI_FormatYUV420PackedSemiPlanar:
                return true;
            default:
                return false;
        }
    }
	private static int selectColorFormat(MediaCodecInfo codecInfo, String mimeType) {
        MediaCodecInfo.CodecCapabilities capabilities = codecInfo.getCapabilitiesForType(mimeType);
        for (int i = 0; i < capabilities.colorFormats.length; i++) {
            int colorFormat = capabilities.colorFormats[i];
            if (isRecognizedFormat(colorFormat)) {
                return colorFormat;
            }
        }
        Log.e("test","error format:" + codecInfo.getName() + " / " + mimeType);
        return 0;
    }
	private static MediaCodecInfo selectCodec(String mimeType) {
        int numCodecs = MediaCodecList.getCodecCount();
        for (int i = 0; i < numCodecs; i++) {
            MediaCodecInfo codecInfo = MediaCodecList.getCodecInfoAt(i);
            if (!codecInfo.isEncoder())    continue;
            String[] types = codecInfo.getSupportedTypes();
            for (int j = 0; j < types.length; j++) {
                if (types[j].equalsIgnoreCase(mimeType))
                    return codecInfo;
            }
        }
        return null;
    }
	
	public AvcEncoder(int width, int height, int framerate, int bitrate) { 
		m_width  = width;
		m_height = height;
		yuv420 = new byte[width*height*3/2];
		String mime = "video/avc";
		int colorFormat = selectColorFormat(selectCodec(mime), mime);
	    mediaCodec = MediaCodec.createEncoderByType(mime);
	    MediaFormat mediaFormat = MediaFormat.createVideoFormat(mime, width, height);
	    mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, bitrate);
	    mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, framerate);
	    mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, colorFormat);
	    mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 5);
	    
	    mediaCodec.configure(mediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
	    mediaCodec.start();
	}

	public void close() {
	    try {
	        mediaCodec.stop();
	        mediaCodec.release();
	    } catch (Exception e){ 
	        e.printStackTrace();
	    }
	}

	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);
	        Log.v("chenqy","inputBufferIndex="+inputBufferIndex);
	        
	        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();
	        Log.v("chenqy","bufferInfo="+bufferInfo);
	        int outputBufferIndex = mediaCodec.dequeueOutputBuffer(bufferInfo,0);
		    Log.v("chenqy","outputBufferIndex="+outputBufferIndex);
	
	        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{
	            	 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
	        	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;
	}
	
    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);  
    }  
}

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