protected override void encodeWithMediaRecorder()
{
// We need a local socket to forward data output by the camera to the packetizer
createSockets();
Android.Util.Log.v(TAG, "Requested audio with " + mQuality.bitRate / 1000 + "kbps" + " at " + mQuality.samplingRate / 1000 + "kHz");
mMediaRecorder = new MediaRecorder();
mMediaRecorder.SetAudioSource((AudioSource)mAudioSource);
mMediaRecorder.SetOutputFormat((OutputFormat)mOutputFormat);
mMediaRecorder.SetAudioEncoder((AudioEncoder)mAudioEncoder);
mMediaRecorder.SetAudioChannels(1);
mMediaRecorder.SetAudioSamplingRate(mQuality.samplingRate);
mMediaRecorder.SetAudioEncodingBitRate(mQuality.bitRate);
// We write the output of the camera in a local socket instead of a file !
// This one little trick makes streaming feasible quiet simply: data from the camera
// can then be manipulated at the other end of the socket
FileDescriptor fd = null;
if (sPipeApi == PIPE_API_PFD)
{
fd = mParcelWrite.FileDescriptor;
}
else
{
fd = mSender.FileDescriptor;
}
mMediaRecorder.SetOutputFile(fd);
mMediaRecorder.SetOutputFile(fd);
mMediaRecorder.Prepare();
mMediaRecorder.Start();
InputStream iStream = null;
if (sPipeApi == PIPE_API_PFD)
{
iStream = new ParcelFileDescriptor.AutoCloseInputStream(mParcelRead);
}
else
{
try {
// mReceiver.getInputStream contains the data from the camera
iStream = mReceiver.InputStream;
} catch (IOException e) {
stop();
throw new IOException("Something happened with the local sockets :/ Start failed !");
}
}
// the mPacketizer encapsulates this stream in an RTP stream and send it over the network
mPacketizer.setInputStream(iStream);
mPacketizer.start();
mStreaming = true;
}
/**
* Video encoding is done by a MediaRecorder.
*/
protected override void encodeWithMediaRecorder()
{
Log.Debug(TAG,"Video encoded using the MediaRecorder API");
// We need a local socket to forward data output by the camera to the packetizer
createSockets();
// Reopens the camera if needed
destroyCamera();
createCamera();
// The camera must be unlocked before the MediaRecorder can use it
unlockCamera();
try {
mMediaRecorder = new MediaRecorder();
mMediaRecorder.SetCamera(mCamera);
mMediaRecorder.SetVideoSource(VideoSource.Camera);
mMediaRecorder.SetOutputFormat(OutputFormat.ThreeGpp);
mMediaRecorder.SetVideoEncoder((VideoEncoder) mVideoEncoder);
mMediaRecorder.SetPreviewDisplay(mSurfaceView.Holder.Surface);
mMediaRecorder.SetVideoSize(mRequestedQuality.resX,mRequestedQuality.resY);
mMediaRecorder.SetVideoFrameRate(mRequestedQuality.framerate);
// The bandwidth actually consumed is often above what was requested
mMediaRecorder.SetVideoEncodingBitRate((int)(mRequestedQuality.bitrate*0.8));
// We write the output of the camera in a local socket instead of a file !
// This one little trick makes streaming feasible quiet simply: data from the camera
// can then be manipulated at the other end of the socket
FileDescriptor fd = null;
if (sPipeApi == PIPE_API_PFD) {
fd = mParcelWrite.FileDescriptor;
} else {
fd = mSender.FileDescriptor;
}
mMediaRecorder.SetOutputFile(fd);
mMediaRecorder.Prepare();
mMediaRecorder.Start();
} catch (System.Exception e) {
throw new ConfNotSupportedException(e.Message);
}
InputStream inputStream = null;
System.IO.Stream inputSStream = null;
if (sPipeApi == PIPE_API_PFD) {
inputStream = new ParcelFileDescriptor.AutoCloseInputStream(mParcelRead);
} else {
inputSStream = mReceiver.InputStream;
}
// This will skip the MPEG4 header if this step fails we can't stream anything :(
try {
byte[] buffer = new byte[4];
// Skip all atoms preceding mdat atom
while (!Thread.Interrupted())
{
if (inputSStream != null)
{
while (inputSStream.ReadByte() != 'm') ;
inputSStream.Read(buffer, 0, 3);
}
else
{
while (inputStream.Read() != 'm');
inputStream.Read(buffer,0,3);
}
if (buffer[0] == 'd' && buffer[1] == 'a' && buffer[2] == 't') break;
}
} catch (IOException e) {
Log.Error(TAG,"Couldn't skip mp4 header :/");
stop();
throw e;
}
// The packetizer encapsulates the bit stream in an RTP stream and send it over the network
mPacketizer.setInputStream(inputStream);
mPacketizer.setInputSStream(inputSStream);
mPacketizer.start();
mStreaming = true;
}
