public void Disconnect()
{
_client.Stop();
_keepaliveTimer = null;
_videoDataChannel = 0;
_decoder = null;
_h264Payload = new H264Payload();
}
private void DataReceived(object sender, RtspChunkEventArgs e)
{
RtspData data_received = e.Message as RtspData;
if (data_received.Channel == _videoDataChannel)
{
// Received some Video or Audio Data on the correct channel.
// RTP Packet Header
// 0 - Version, P, X, CC, M, PT and Sequence Number
//32 - Timestamp
//64 - SSRC
//96 - CSRCs (optional)
//nn - Extension ID and Length
//nn - Extension header
int rtp_version = (e.Message.Data[0] >> 6);
int rtp_padding = (e.Message.Data[0] >> 5) & 0x01;
int rtp_extension = (e.Message.Data[0] >> 4) & 0x01;
int rtp_csrc_count = (e.Message.Data[0] >> 0) & 0x0F;
int rtp_marker = (e.Message.Data[1] >> 7) & 0x01;
int rtp_payload_type = (e.Message.Data[1] >> 0) & 0x7F;
uint rtp_sequence_number = ((uint)e.Message.Data[2] << 8) + (uint)(e.Message.Data[3]);
uint rtp_timestamp = ((uint)e.Message.Data[4] << 24) + (uint)(e.Message.Data[5] << 16) + (uint)(e.Message.Data[6] << 8) + (uint)(e.Message.Data[7]);
uint rtp_ssrc = ((uint)e.Message.Data[8] << 24) + (uint)(e.Message.Data[9] << 16) + (uint)(e.Message.Data[10] << 8) + (uint)(e.Message.Data[11]);
int rtp_payload_start = 4 // V,P,M,SEQ
+ 4 // time stamp
+ 4 // ssrc
+ (4 * rtp_csrc_count); // zero or more csrcs
uint rtp_extension_id = 0;
uint rtp_extension_size = 0;
if (rtp_extension == 1)
{
rtp_extension_id = ((uint)e.Message.Data[rtp_payload_start + 0] << 8) + (uint)(e.Message.Data[rtp_payload_start + 1] << 0);
rtp_extension_size = ((uint)e.Message.Data[rtp_payload_start + 2] << 8) + (uint)(e.Message.Data[rtp_payload_start + 3] << 0) * 4; // units of extension_size is 4-bytes
rtp_payload_start += 4 + (int)rtp_extension_size; // extension header and extension payload
}
if (data_received.Channel == _videoDataChannel && rtp_payload_type == 96)
{
byte[] rtp_payload = new byte[e.Message.Data.Length - rtp_payload_start];
Array.Copy(e.Message.Data, rtp_payload_start, rtp_payload, 0, rtp_payload.Length);
List <byte[]> nal_units = _h264Payload.Process_H264_RTP_Packet(rtp_payload, rtp_marker);
if (nal_units != null)
{
// we have passed in enough RTP packets to make a Frame of video
try
{
if (_decoder == null)
{
_decoder = new H264Decoder(nal_units);
}
_currentBitmap = _decoder.Update(nal_units);
NewBitmapAvailable.Set();
}
catch (Exception error)
{
Console.WriteLine(error.Message);
}
}
}
}
}
