Java SurfaceTexture.getTimestamp方法代碼示例

import android.graphics.SurfaceTexture; //導入方法依賴的package包/類
/**
 * Tells the video recorder that a new frame is available.  (Call from non-encoder thread.)
 * <p>
 * This function sends a message and returns immediately.  This isn't sufficient -- we
 * don't want the caller to latch a new frame until we're done with this one -- but we
 * can get away with it so long as the input frame rate is reasonable and the encoder
 * thread doesn't stall.
 * <p>
 * TODO: either block here until the texture has been rendered onto the encoder surface,
 * or have a separate "block if still busy" method that the caller can execute immediately
 * before it calls updateTexImage().  The latter is preferred because we don't want to
 * stall the caller while this thread does work.
 */
public void frameAvailable(SurfaceTexture st) {
    synchronized (mReadyFence) {
        if (!mReady) {
            return;
        }
    }

    float[] transform = new float[16];      // TODO - avoid alloc every frame
    st.getTransformMatrix(transform);
    long timestamp = st.getTimestamp();
    if (timestamp == 0) {
        // Seeing this after device is toggled off/on with power button.  The
        // first frame back has a zero timestamp.
        //
        // MPEG4Writer thinks this is cause to abort() in native code, so it's very
        // important that we just ignore the frame.
        Log.w(TAG, "HEY: got SurfaceTexture with timestamp of zero");
        return;
    }

    mHandler.sendMessage(mHandler.obtainMessage(MSG_FRAME_AVAILABLE,
            (int) (timestamp >> 32), (int) timestamp, transform));
}
 

import android.graphics.SurfaceTexture; //導入方法依賴的package包/類
private void glRun(){
    EglHelper egl=new EglHelper();
    boolean ret=egl.createGLESWithSurface(new EGLConfigAttrs(),new EGLContextAttrs(),new SurfaceTexture(1));
    if(!ret){
        //todo 錯誤處理
        return;
    }
    int mInputSurfaceTextureId = GpuUtils.createTextureID(true);
    SurfaceTexture mInputSurfaceTexture = new SurfaceTexture(mInputSurfaceTextureId);

    Point size=mProvider.open(mInputSurfaceTexture);
    AvLog.d(TAG,"Provider Opened . data size (x,y)="+size.x+"/"+size.y);
    if(size.x<=0||size.y<=0){
        //todo 錯誤處理
        destroyGL(egl);
        synchronized (LOCK){
            LOCK.notifyAll();
        }
        return;
    }
    int mSourceWidth = size.x;
    int mSourceHeight = size.y;
    synchronized (LOCK){
        LOCK.notifyAll();
    }
    //要求數據源提供者必須同步返回數據大小
    if(mSourceWidth <=0|| mSourceHeight <=0){
        error(1,"video source return inaccurate size to SurfaceTextureActuator");
        return;
    }

    if(mRenderer==null){
        mRenderer=new WrapRenderer(null);
    }
    FrameBuffer sourceFrame=new FrameBuffer();
    mRenderer.create();
    mRenderer.sizeChanged(mSourceWidth, mSourceHeight);
    mRenderer.setFlag(mProvider.isLandscape()?WrapRenderer.TYPE_CAMERA:WrapRenderer.TYPE_MOVE);

    //用於其他的回調
    RenderBean rb=new RenderBean();
    rb.egl=egl;
    rb.sourceWidth= mSourceWidth;
    rb.sourceHeight= mSourceHeight;
    rb.endFlag=false;
    rb.threadId=Thread.currentThread().getId();
    AvLog.d(TAG,"Processor While Loop Entry");
    //要求數據源必須同步填充SurfaceTexture，填充完成前等待
    while (!mProvider.frame()&&mGLThreadFlag){
        mInputSurfaceTexture.updateTexImage();
        mInputSurfaceTexture.getTransformMatrix(mRenderer.getTextureMatrix());
        AvLog.d(TAG,"timestamp:"+ mInputSurfaceTexture.getTimestamp());
        sourceFrame.bindFrameBuffer(mSourceWidth, mSourceHeight);
        GLES20.glViewport(0,0, mSourceWidth, mSourceHeight);
        mRenderer.draw(mInputSurfaceTextureId);
        sourceFrame.unBindFrameBuffer();
        rb.textureId=sourceFrame.getCacheTextureId();
        //接收數據源傳入的時間戳
        rb.timeStamp=mProvider.getTimeStamp();
        rb.textureTime= mInputSurfaceTexture.getTimestamp();
        observable.notify(rb);
    }
    AvLog.d(TAG,"out of gl thread loop");
    synchronized (LOCK){
        rb.endFlag=true;
        observable.notify(rb);
        mRenderer.destroy();
        destroyGL(egl);
        LOCK.notifyAll();
        AvLog.d(TAG,"gl thread exit");
    }
}