public unsafe IDecodedVideoFrame TryDecode(RawVideoFrame rawVideoFrame)
{
fixed(byte *rawBufferPtr = &rawVideoFrame.FrameSegment.Array[rawVideoFrame.FrameSegment.Offset])
{
int resultCode;
if (rawVideoFrame is RawH264IFrame rawH264IFrame)
{
if (rawH264IFrame.SpsPpsSegment.Array != null &&
!_extraData.SequenceEqual(rawH264IFrame.SpsPpsSegment))
{
if (_extraData.Length != rawH264IFrame.SpsPpsSegment.Count)
{
_extraData = new byte[rawH264IFrame.SpsPpsSegment.Count];
}
Buffer.BlockCopy(rawH264IFrame.SpsPpsSegment.Array, rawH264IFrame.SpsPpsSegment.Offset,
_extraData, 0, rawH264IFrame.SpsPpsSegment.Count);
fixed(byte *initDataPtr = &_extraData[0])
{
resultCode = FFmpegVideoPInvoke.SetVideoDecoderExtraData(_decoderHandle,
(IntPtr)initDataPtr, _extraData.Length);
if (resultCode != 0)
{
throw new DecoderException(
$"An error occurred while setting video extra data, {_videoCodecId} codec, code: {resultCode}");
}
}
}
}
lock (disposalLock) {
if (_disposed)
{
Console.WriteLine("Skipped decoding video frame, as decoder was disposed. (Therefore the frame probably wasn't wanted)");
return(null);
}
resultCode = FFmpegVideoPInvoke.DecodeFrame(_decoderHandle, (IntPtr)rawBufferPtr,
rawVideoFrame.FrameSegment.Count,
out int width, out int height, out FFmpegPixelFormat pixelFormat);
if (resultCode != 0)
{
return(null);
}
if (_currentFrameParameters.Width != width || _currentFrameParameters.Height != height ||
_currentFrameParameters.PixelFormat != pixelFormat)
{
_currentFrameParameters = new DecodedVideoFrameParameters(width, height, pixelFormat);
DropAllVideoScalers();
}
}
return(new DecodedVideoFrame(TransformTo));
}
}
public unsafe bool TryDecode(RawVideoFrame rawVideoFrame, out DecodedVideoFrameParameters frameParameters)
{
Debug.Assert(rawVideoFrame.FrameSegment.Array != null, "rawVideoFrame.FrameSegment.Array != null");
fixed(byte *rawBufferPtr = &rawVideoFrame.FrameSegment.Array[rawVideoFrame.FrameSegment.Offset])
{
int resultCode;
if (rawVideoFrame is RawH264IFrame rawH264IFrame)
{
if (rawH264IFrame.SpsPpsSegment.Array != null &&
!_extraData.SequenceEqual(rawH264IFrame.SpsPpsSegment))
{
if (_extraData.Length != rawH264IFrame.SpsPpsSegment.Count)
{
_extraData = new byte[rawH264IFrame.SpsPpsSegment.Count];
}
Buffer.BlockCopy(rawH264IFrame.SpsPpsSegment.Array, rawH264IFrame.SpsPpsSegment.Offset,
_extraData, 0, rawH264IFrame.SpsPpsSegment.Count);
fixed(byte *initDataPtr = &_extraData[0])
{
resultCode = FFmpegVideoPInvoke.SetVideoDecoderExtraData(_decoderHandle,
(IntPtr)initDataPtr, _extraData.Length);
if (resultCode != 0)
{
throw new DecoderException(
$"An error occurred while setting video extra data, {_videoCodecId} codec, code: {resultCode}");
}
}
}
}
resultCode = FFmpegVideoPInvoke.DecodeFrame(_decoderHandle, (IntPtr)rawBufferPtr,
rawVideoFrame.FrameSegment.Count,
out int width, out int height, out FFmpegPixelFormat pixelFormat);
if (resultCode != 0)
{
frameParameters = null;
return(false);
}
_currentDecodedFrameTimestamp = rawVideoFrame.Timestamp;
if (_currentFrameParameters.Width != width || _currentFrameParameters.Height != height ||
_currentFrameParameters.PixelFormat != pixelFormat)
{
_currentFrameParameters = new DecodedVideoFrameParameters(width, height, pixelFormat);
DropAllVideoScalers();
}
frameParameters = _currentFrameParameters;
return(true);
}
}