public unsafe IDecodedVideoFrame GetDecodedFrame(ArraySegment <byte> bufferSegment,
PostVideoDecodingParameters parameters)
{
if (!_scalersMap.TryGetValue(parameters, out FFmpegDecodedVideoScaler videoScaler))
{
videoScaler = FFmpegDecodedVideoScaler.Create(_currentFrameParameters, parameters);
_scalersMap.Add(parameters, videoScaler);
}
int resultCode;
Debug.Assert(bufferSegment.Array != null, "bufferSegment.Array != null");
fixed(byte *scaledBuffer = &bufferSegment.Array[bufferSegment.Offset])
resultCode = FFmpegVideoPInvoke.ScaleDecodedVideoFrame(_decoderHandle, videoScaler.Handle,
(IntPtr)scaledBuffer, videoScaler.ScaledStride);
if (resultCode != 0)
{
throw new DecoderException(
$"An error occurred while converting decoding video frame, {_videoCodecId} codec, code: {resultCode}");
}
return(new DecodedVideoFrame(_currentDecodedFrameTimestamp, bufferSegment, _currentFrameParameters.Width,
_currentFrameParameters.Height,
videoScaler.ScaledWidth, videoScaler.ScaledHeight, videoScaler.ScaledPixelFormat,
videoScaler.ScaledStride));
}
public unsafe IDecodedVideoFrame GetDecodedFrame(PostVideoDecodingParameters parameters)
{
if (!_scalersMap.TryGetValue(parameters, out FFmpegDecodedVideoScaler videoScaler))
{
videoScaler = FFmpegDecodedVideoScaler.Create(_currentFrameParameters, parameters);
_scalersMap.Add(parameters, videoScaler);
}
int resultCode;
int bufferSize = parameters.TargetFrameSize.Height *
ImageUtils.GetStride(parameters.TargetFrameSize.Width, parameters.TargetFormat);
if (_decodedFrameBuffer.Length < bufferSize)
{
_decodedFrameBuffer = new byte[bufferSize];
fixed(byte *scaledBuffer = _decodedFrameBuffer)
resultCode = FFmpegVideoPInvoke.ScaleDecodedVideoFrame(_decoderHandle, videoScaler.Handle, (IntPtr)scaledBuffer, videoScaler.ScaledStride);
if (resultCode != 0)
{
throw new DecoderException(
$"An error occurred while converting decoding video frame, {_videoCodecId} codec, code: {resultCode}");
}
return(new DecodedVideoFrame(_currentDecodedFrameTimestamp, new ArraySegment <byte>(_decodedFrameBuffer, 0, bufferSize), _currentFrameParameters.Width,
_currentFrameParameters.Height,
videoScaler.ScaledWidth, videoScaler.ScaledHeight, videoScaler.ScaledPixelFormat,
videoScaler.ScaledStride));
}
private void TransformTo(IntPtr buffer, int bufferStride, TransformParameters parameters)
{
if (!_scalersMap.TryGetValue(parameters, out FFmpegDecodedVideoScaler videoScaler))
{
videoScaler = FFmpegDecodedVideoScaler.Create(_currentFrameParameters, parameters);
_scalersMap.Add(parameters, videoScaler);
}
int resultCode = FFmpegVideoPInvoke.ScaleDecodedVideoFrame(_decoderHandle, videoScaler.Handle, buffer, bufferStride);
if (resultCode != 0)
{
throw new DecoderException($"An error occurred while converting decoding video frame, {_videoCodecId} codec, code: {resultCode}");
}
}
private void TransformTo(IntPtr buffer, int bufferStride, TransformParameters parameters)
{
if (!_scalersMap.TryGetValue(parameters, out FFmpegDecodedVideoScaler videoScaler))
{
videoScaler = FFmpegDecodedVideoScaler.Create(_currentFrameParameters, parameters);
_scalersMap.Add(parameters, videoScaler);
}
lock (disposalLock) {
if (_disposed)
{
Console.WriteLine("Skipped scaling video frame, as decoder was disposed. (Therefore the frame probably wasn't wanted)");
return;
}
int resultCode = FFmpegVideoPInvoke.ScaleDecodedVideoFrame(_decoderHandle, videoScaler.Handle, buffer, bufferStride);
if (resultCode != 0)
{
throw new DecoderException($"An error occurred while converting decoding video frame, {_videoCodecId} codec, code: {resultCode}");
}
}
}
