public static FFmpegVideoDecoder CreateDecoder(FFmpegVideoCodecId videoCodecId)
{
int resultCode;
IntPtr decoderPtr;
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
resultCode = FFmpegVideoPInvokeWin.CreateVideoDecoder(videoCodecId, out decoderPtr);
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
resultCode = FFmpegVideoPInvokeLinux.CreateVideoDecoder(videoCodecId, out decoderPtr);
}
else
{
throw new PlatformNotSupportedException();
}
if (resultCode != 0)
{
throw new DecoderException(
$"CreateDecoder say: An error occurred while creating video decoder for {videoCodecId} codec, code: {resultCode}");
}
return(new FFmpegVideoDecoder(videoCodecId, decoderPtr));
}
private FFmpegVideoDecoder GetDecoderForFrame(RawVideoFrame videoFrame)
{
FFmpegVideoCodecId codecId = DetectCodecId(videoFrame);
if (!_videoDecodersMap.TryGetValue(codecId, out FFmpegVideoDecoder decoder))
{
decoder = FFmpegVideoDecoder.CreateDecoder(codecId);
_videoDecodersMap.Add(codecId, decoder);
}
return(decoder);
}
public static FFmpegVideoDecoder CreateDecoder(FFmpegVideoCodecId videoCodecId)
{
int resultCode = FFmpegVideoPInvoke.CreateVideoDecoder(videoCodecId, out IntPtr decoderPtr);
if (resultCode != 0)
{
throw new DecoderException(
$"An error occurred while creating video decoder for {videoCodecId} codec, code: {resultCode}");
}
return(new FFmpegVideoDecoder(videoCodecId, decoderPtr));
}
public static extern int CreateVideoDecoder(FFmpegVideoCodecId videoCodecId, out IntPtr handle);
private FFmpegVideoDecoder(FFmpegVideoCodecId videoCodecId, IntPtr decoderHandle)
{
_videoCodecId = videoCodecId;
_decoderHandle = decoderHandle;
}
