/// <summary>
/// Prepares for writing.
/// </summary>
/// <param name="showFFmpegOutput">Show output to terminal. Error stream will not be redirected if this is set to true.</param>
/// <param name="thread_queue_size">Max. number of queued packets when reading from file/stream.
/// Should be set to higher when dealing with high rate/low latency streams.</param>
public void OpenWrite(bool showFFmpegOutput = false, int thread_queue_size = 4096)
{
if (OpenedForWriting)
{
throw new InvalidOperationException("File/Stream was already opened for writing!");
}
var manual = new ManualResetEvent(false);
socket = new Socket(SocketType.Stream, ProtocolType.Tcp);
socket.Bind(new IPEndPoint(IPAddress.Loopback, 0));
socket.Listen(4);
var port = ((IPEndPoint)socket.LocalEndPoint).Port;
socket.BeginAccept(r =>
{
connected_socket = socket.EndAccept(r);
InputDataStreamAudio = new NetworkStream(connected_socket);
manual.Set();
}, null);
var cmd = $"-f s{AudioBitDepth}le -channels {AudioChannels} -sample_rate {AudioSampleRate} " +
$"-thread_queue_size {thread_queue_size} -i \"tcp://{IPAddress.Loopback}:{port}\" " +
$"-f rawvideo -video_size {VideoWidth}:{VideoHeight} -r {VideoFramerate} " +
$"-thread_queue_size {thread_queue_size} -pixel_format rgb24 -i - " +
$"-map 0 -c:a {AudioEncoderOptions.EncoderName} {AudioEncoderOptions.EncoderArguments} " +
$"-map 1 -c:v {VideoEncoderOptions.EncoderName} {VideoEncoderOptions.EncoderArguments} " +
$"-f {VideoEncoderOptions.Format}";
if (UseFilename)
{
if (File.Exists(Filename))
{
File.Delete(Filename);
}
InputDataStreamVideo = FFmpegWrapper.OpenInput(ffmpeg, $"{cmd} \"{Filename}\"", out ffmpegp, showFFmpegOutput);
}
else
{
csc = new CancellationTokenSource();
// using stream
(InputDataStreamVideo, OutputDataStream) = FFmpegWrapper.Open(ffmpeg, $"{cmd} -", out ffmpegp, showFFmpegOutput);
_ = OutputDataStream.CopyToAsync(DestinationStream, csc.Token);
}
manual.WaitOne();
OpenedForWriting = true;
}
/// <summary>
/// Closes output video.
/// </summary>
public void CloseWrite()
{
if (!OpenedForWriting)
{
throw new InvalidOperationException("File is not opened for writing!");
}
try
{
InputDataStreamAudio?.Dispose();
InputDataStreamVideo?.Dispose();
connected_socket?.Shutdown(SocketShutdown.Both);
connected_socket?.Close();
socket?.Close();
ffmpegp.WaitForExit();
csc?.Cancel();
if (!UseFilename)
{
OutputDataStream?.Dispose();
}
try
{
if (ffmpegp?.HasExited == false)
{
ffmpegp.Kill();
}
}
catch { }
}
finally
{
OpenedForWriting = false;
}
}
/// <summary>Sends a message of type RPY.</summary>
/// <param name="stream">Data to send in the form of <code>OutputDataStream</code>.</param>
/// <seealso cref="OutputDataStream"></seealso>
/// <seealso cref="MessageStatus"></seealso>
/// <returns>MessageStatus</returns>
///
/// <exception cref="BEEPException">if an error is encoutered or if messageType is
/// not MESSAGE_TYPE_MSG.</exception>
public virtual MessageStatus sendRPY(OutputDataStream stream)
{
throw new BEEPException(NOT_MESSAGE_TYPE_MSG);
}
/// <summary>Sends a 'synchronous' request on this <code>SharedChannel</code>.</summary>
/// <param name="ds"><code>DataStream</code> to send as this request's payload.</param>
/// <returns>Reply Caller may block using this object to retrieve the reply
/// to this request.</returns>
/// <exception cref="BEEPException" />
public virtual Reply sendRequest(OutputDataStream ds)
{
Reply r = new Reply();
channel.sendMSG(ds, r);
return r;
}
/// <summary>Send a message of type MSG. Sends <code>stream</code> as message's
/// payload.</summary>
/// <param name="stream"><code>DataStream</code> that is read to send data.</param>
/// <param name="replyListener"></param>
/// <returns>MessageStatus Can be queried to get status information about the
/// message.</returns>
/// <seealso cref="OutputDataStream"></seealso>
/// <seealso cref="MessageStatus"></seealso>
/// <exception cref="BEEPException" />
public virtual MessageStatus sendMSG(OutputDataStream stream, ReplyListener replyListener)
{
return channel.sendMSG(stream, replyListener);
}