/// <summary>
/// This method gets called when an encoded video sample has been received from the remote call party.
/// The sample needs to be decoded and then handed off to the UI for display.
/// </summary>
/// <param name="sample">The encoded video sample.</param>
public void EncodedVideoSampleReceived(byte[] sample, int length)
{
IntPtr encodedBufferPtr = Marshal.AllocHGlobal(length);
Marshal.Copy(sample, 0, encodedBufferPtr, length);
byte[] decodedBuffer = null;
uint decodedImgWidth = 0;
uint decodedImgHeight = 0;
unsafe
{
_vpxDecoder.Decode((byte *)encodedBufferPtr, length, ref decodedBuffer, ref decodedImgWidth, ref decodedImgHeight);
}
Marshal.FreeHGlobal(encodedBufferPtr);
if (decodedBuffer != null && decodedBuffer.Length > 0)
{
IntPtr decodedSamplePtr = Marshal.AllocHGlobal(decodedBuffer.Length);
Marshal.Copy(decodedBuffer, 0, decodedSamplePtr, decodedBuffer.Length);
byte[] bmp = null;
unsafe
{
_imageConverter.ConvertYUVToRGB((byte *)decodedSamplePtr, VideoSubTypesEnum.I420, Convert.ToInt32(decodedImgWidth), Convert.ToInt32(decodedImgHeight), VideoSubTypesEnum.RGB24, ref bmp);
}
Marshal.FreeHGlobal(decodedSamplePtr);
OnRemoteVideoSampleReady?.Invoke(bmp, Convert.ToInt32(decodedImgWidth), Convert.ToInt32(decodedImgHeight));
}
}
private static void RtpSession_OnRtpPacketReceived(SDPMediaTypesEnum mediaType, RTPPacket rtpPacket)
{
if (mediaType == SDPMediaTypesEnum.audio)
{
//Console.WriteLine($"rtp audio, seqnum {rtpPacket.Header.SequenceNumber}, payload type {rtpPacket.Header.PayloadType}, marker {rtpPacket.Header.MarkerBit}.");
}
else if (mediaType == SDPMediaTypesEnum.video)
{
//Console.WriteLine($"rtp video, seqnum {rtpPacket.Header.SequenceNumber}, ts {rtpPacket.Header.Timestamp}, marker {rtpPacket.Header.MarkerBit}, payload {rtpPacket.Payload.Length}, payload[0-5] {rtpPacket.Payload.HexStr(5)}.");
// New frames must have the VP8 Payload Descriptor Start bit set.
if (_currVideoFramePosn > 0 || (rtpPacket.Payload[0] & 0x10) > 0)
{
// TODO: use the VP8 Payload descriptor to properly determine the VP8 header length (currently hard coded to 4).
Buffer.BlockCopy(rtpPacket.Payload, 4, _currVideoFrame, _currVideoFramePosn, rtpPacket.Payload.Length - 4);
_currVideoFramePosn += rtpPacket.Payload.Length - 4;
if (rtpPacket.Header.MarkerBit == 1)
{
unsafe
{
fixed(byte *p = _currVideoFrame)
{
uint width = 0, height = 0;
byte[] i420 = null;
//Console.WriteLine($"Attempting vpx decode {_currVideoFramePosn} bytes.");
int decodeResult = _vpxEncoder.Decode(p, _currVideoFramePosn, ref i420, ref width, ref height);
if (decodeResult != 0)
{
Console.WriteLine("VPX decode of video sample failed.");
}
else
{
//Console.WriteLine($"Video frame ready {width}x{height}.");
fixed(byte *r = i420)
{
byte[] bmp = null;
int stride = 0;
int convRes = _imgConverter.ConvertYUVToRGB(r, VideoSubTypesEnum.I420, (int)width, (int)height, VideoSubTypesEnum.BGR24, ref bmp, ref stride);
if (convRes == 0)
{
_form.BeginInvoke(new Action(() =>
{
fixed(byte *s = bmp)
{
System.Drawing.Bitmap bmpImage = new System.Drawing.Bitmap((int)width, (int)height, stride, System.Drawing.Imaging.PixelFormat.Format24bppRgb, (IntPtr)s);
_picBox.Image = bmpImage;
}
}));
}
else
{
Console.WriteLine("Pixel format conversion of decoded sample failed.");
}
}
}
}
}
_currVideoFramePosn = 0;
}
}
else
{
Console.WriteLine("Discarding RTP packet, VP8 header Start bit not set.");
Console.WriteLine($"rtp video, seqnum {rtpPacket.Header.SequenceNumber}, ts {rtpPacket.Header.Timestamp}, marker {rtpPacket.Header.MarkerBit}, payload {rtpPacket.Payload.Length}, payload[0-5] {rtpPacket.Payload.HexStr(5)}.");
}
}
}
/// <summary>
/// Render a video RTP packet received from a remote party.
/// </summary>
/// <param name="rtpPacket">The RTP packet containing the video payload.</param>
private void RenderVideo(RTPPacket rtpPacket)
{
if ((rtpPacket.Payload[0] & 0x10) > 0)
{
RtpVP8Header vp8Header = RtpVP8Header.GetVP8Header(rtpPacket.Payload);
Buffer.BlockCopy(rtpPacket.Payload, vp8Header.Length, _currVideoFrame, _currVideoFramePosn, rtpPacket.Payload.Length - vp8Header.Length);
_currVideoFramePosn += rtpPacket.Payload.Length - vp8Header.Length;
if (rtpPacket.Header.MarkerBit == 1)
{
unsafe
{
fixed(byte *p = _currVideoFrame)
{
uint width = 0, height = 0;
byte[] i420 = null;
//Console.WriteLine($"Attempting vpx decode {_currVideoFramePosn} bytes.");
int decodeResult = _vpxDecoder.Decode(p, _currVideoFramePosn, ref i420, ref width, ref height);
if (decodeResult != 0)
{
Console.WriteLine("VPX decode of video sample failed.");
}
else
{
if (OnVideoSampleReady != null)
{
fixed(byte *r = i420)
{
byte[] bmp = null;
int stride = 0;
int convRes = _imgConverter.ConvertYUVToRGB(r, VideoSubTypesEnum.I420, (int)width, (int)height, VideoSubTypesEnum.BGR24, ref bmp, ref stride);
if (convRes == 0)
{
//fixed (byte* s = bmp)
//{
// System.Drawing.Bitmap bmpImage = new System.Drawing.Bitmap((int)width, (int)height, stride, System.Drawing.Imaging.PixelFormat.Format24bppRgb, (IntPtr)s);
//}
OnVideoSampleReady(bmp, width, height, stride);
}
else
{
Log.LogWarning("Pixel format conversion of decoded sample failed.");
}
}
}
}
}
}
_currVideoFramePosn = 0;
}
}
else
{
Log.LogWarning("Discarding RTP packet, VP8 header Start bit not set.");
Log.LogWarning($"rtp video, seqnum {rtpPacket.Header.SequenceNumber}, ts {rtpPacket.Header.Timestamp}, marker {rtpPacket.Header.MarkerBit}, payload {rtpPacket.Payload.Length}, payload[0-5] {rtpPacket.Payload.HexStr(5)}.");
}
}
private static void RtpSession_OnRtpPacketReceived(IPEndPoint remoteEndPoint, SDPMediaTypesEnum mediaType, RTPPacket rtpPacket)
{
if (mediaType == SDPMediaTypesEnum.audio)
{
//Console.WriteLine($"rtp audio, seqnum {rtpPacket.Header.SequenceNumber}, payload type {rtpPacket.Header.PayloadType}, marker {rtpPacket.Header.MarkerBit}.");
}
else if (mediaType == SDPMediaTypesEnum.video)
{
//Console.WriteLine($"rtp video, seqnum {rtpPacket.Header.SequenceNumber}, ts {rtpPacket.Header.Timestamp}, marker {rtpPacket.Header.MarkerBit}, payload {rtpPacket.Payload.Length}, payload[0-5] {rtpPacket.Payload.HexStr(5)}.");
// New frames must have the VP8 Payload Descriptor Start bit set.
// The tracking of the current video frame position is to deal with a VP8 frame being split across multiple RTP packets
// as per https://tools.ietf.org/html/rfc7741#section-4.4.
if (_currVideoFramePosn > 0 || (rtpPacket.Payload[0] & 0x10) > 0)
{
RtpVP8Header vp8Header = RtpVP8Header.GetVP8Header(rtpPacket.Payload);
Buffer.BlockCopy(rtpPacket.Payload, vp8Header.Length, _currVideoFrame, _currVideoFramePosn, rtpPacket.Payload.Length - vp8Header.Length);
_currVideoFramePosn += rtpPacket.Payload.Length - vp8Header.Length;
if (rtpPacket.Header.MarkerBit == 1)
{
unsafe
{
fixed(byte *p = _currVideoFrame)
{
uint width = 0, height = 0;
byte[] i420 = null;
//Console.WriteLine($"Attempting vpx decode {_currVideoFramePosn} bytes.");
int decodeResult = _vpxEncoder.Decode(p, _currVideoFramePosn, ref i420, ref width, ref height);
if (decodeResult != 0)
{
Console.WriteLine("VPX decode of video sample failed.");
}
else
{
//Console.WriteLine($"Video frame ready {width}x{height}.");
fixed(byte *r = i420)
{
byte[] bmp = null;
int stride = 0;
int convRes = _imgConverter.ConvertYUVToRGB(r, VideoSubTypesEnum.I420, (int)width, (int)height, VideoSubTypesEnum.BGR24, ref bmp, ref stride);
if (convRes == 0)
{
_form.BeginInvoke(new Action(() =>
{
fixed(byte *s = bmp)
{
System.Drawing.Bitmap bmpImage = new System.Drawing.Bitmap((int)width, (int)height, stride, System.Drawing.Imaging.PixelFormat.Format24bppRgb, (IntPtr)s);
_picBox.Image = bmpImage;
}
}));
}
else
{
Console.WriteLine("Pixel format conversion of decoded sample failed.");
}
}
}
}
}
_currVideoFramePosn = 0;
}
}
else
{
Console.WriteLine("Discarding RTP packet, VP8 header Start bit not set.");
Console.WriteLine($"rtp video, seqnum {rtpPacket.Header.SequenceNumber}, ts {rtpPacket.Header.Timestamp}, marker {rtpPacket.Header.MarkerBit}, payload {rtpPacket.Payload.Length}, payload[0-5] {rtpPacket.Payload.HexStr(5)}.");
}
}
}
