private unsafe void VideoDecoder_OnVideoFrame(ref AVFrame frame)
{
if ((OnVideoSourceEncodedSample != null) || (OnVideoSourceRawSampleFaster != null))
{
int frameRate = (int)_videoDecoder.VideoAverageFrameRate;
frameRate = (frameRate <= 0) ? Helper.DEFAULT_VIDEO_FRAME_RATE : frameRate;
uint timestampDuration = (uint)(VideoFormat.DEFAULT_CLOCK_RATE / frameRate);
var width = frame.width;
var height = frame.height;
// Manage Raw Sample
if (OnVideoSourceRawSampleFaster != null)
{
if (_videoFrameBGR24Converter == null ||
_videoFrameBGR24Converter.SourceWidth != width ||
_videoFrameBGR24Converter.SourceHeight != height)
{
_videoFrameBGR24Converter = new VideoFrameConverter(
width, height,
(AVPixelFormat)frame.format,
width, height,
AVPixelFormat.AV_PIX_FMT_BGR24);
logger.LogDebug($"Frame format: [{frame.format}]");
}
var frameBGR24 = _videoFrameBGR24Converter.Convert(frame);
if ((frameBGR24.width != 0) && (frameBGR24.height != 0))
{
RawImage imageRawSample = new RawImage
{
Width = width,
Height = height,
Stride = frameBGR24.linesize[0],
Sample = (IntPtr)frameBGR24.data[0],
PixelFormat = VideoPixelFormatsEnum.Rgb
};
OnVideoSourceRawSampleFaster?.Invoke(timestampDuration, imageRawSample);
}
}
// Manage Encoded Sample
if (OnVideoSourceEncodedSample != null)
{
if (_videoFrameYUV420PConverter == null ||
_videoFrameYUV420PConverter.SourceWidth != width ||
_videoFrameYUV420PConverter.SourceHeight != height)
{
_videoFrameYUV420PConverter = new VideoFrameConverter(
width, height,
(AVPixelFormat)frame.format,
width, height,
AVPixelFormat.AV_PIX_FMT_YUV420P);
logger.LogDebug($"Frame format: [{frame.format}]");
}
var frameYUV420P = _videoFrameYUV420PConverter.Convert(frame);
if ((frameYUV420P.width != 0) && (frameYUV420P.height != 0))
{
AVCodecID aVCodecId = FFmpegConvert.GetAVCodecID(_videoFormatManager.SelectedFormat.Codec);
byte[]? encodedSample = _videoEncoder.Encode(aVCodecId, frameYUV420P, frameRate);
if (encodedSample != null)
{
// Note the event handler can be removed while the encoding is in progress.
OnVideoSourceEncodedSample?.Invoke(timestampDuration, encodedSample);
}
_forceKeyFrame = false;
}
else
{
_forceKeyFrame = true;
}
}
}
}
private void _FFmpegVideoSource_OnVideoSourceRawSampleFaster(uint durationMilliseconds, RawImage imageRawSample)
{
OnVideoSourceRawSampleFaster?.Invoke(durationMilliseconds, imageRawSample);
}
