OutputSurface.java 文件源码

@Override
public void onFrameAvailable(SurfaceTexture st) {
    synchronized (mFrameSyncObject) {
        if (mFrameAvailable) {
            throw new RuntimeException("mFrameAvailable already set, frame could be dropped");
        }
        mFrameAvailable = true;
        mFrameSyncObject.notifyAll();
    }
}