how to define connected camera as media source to webrtc android
public void onReceive(byte[] videoBuffer, int size, int width, int height) {
long timestampNS = TimeUnit.MILLISECONDS.toNanos(SystemClock.elapsedRealtime());
NV21Buffer buffer = new NV21Buffer(videoBuffer, width, height, null);
VideoFrame videoFrame = new VideoFrame(buffer, 0, timestampNS);
videoSource.getCapturerObserver().onFrameCaptured(videoFrame);
videoFrame.release();
}