public StreamDecoder(string url, DecoderConfiguration configuration)
{
FFmpegBinariesHelper.RegisterFFmpegBinaries(); //Should not be here
this.decoderConfiguration = configuration;
_pFormatContext = ffmpeg.avformat_alloc_context();
var pFormatContext = _pFormatContext;
ffmpeg.avformat_open_input(&pFormatContext, url, null, null).ThrowExceptionIfError();
ffmpeg.avformat_find_stream_info(_pFormatContext, null).ThrowExceptionIfError();
// find the first video stream
AVStream *pStream = null;
for (var i = 0; i < _pFormatContext->nb_streams; i++)
{
if (_pFormatContext->streams[i]->codec->codec_type == AVMediaType.AVMEDIA_TYPE_VIDEO)
{
pStream = _pFormatContext->streams[i];
break;
}
}
if (pStream == null)
{
throw new InvalidOperationException("Could not found video stream.");
}
_streamIndex = pStream->index;
_pCodecContext = pStream->codec;
var codecId = _pCodecContext->codec_id;
var pCodec = ffmpeg.avcodec_find_decoder(codecId);
if (pCodec == null)
{
throw new InvalidOperationException("Unsupported codec.");
}
ffmpeg.avcodec_open2(_pCodecContext, pCodec, null).ThrowExceptionIfError();
decoderConfiguration.codec = FormatHelper.FFmpegToOT2(codecId);
decoderConfiguration.inputResolution = new Resolution(_pCodecContext->height, _pCodecContext->width);
//CodecName = ffmpeg.avcodec_get_name(codecId);
//PixelFormat = _pCodecContext->pix_fmt;
decoderConfiguration.inputPixelFormat = FormatHelper.FFmpegToOT2(_pCodecContext->pix_fmt);
_pPacket = ffmpeg.av_packet_alloc();
_pFrame = ffmpeg.av_frame_alloc();
decodingThread = new Thread(() => { while (DecodeFrame() == 0)
{
;
}
});
}
public VideoDecoder(DecoderConfiguration configuration)
{
FFmpegBinariesHelper.RegisterFFmpegBinaries();
//outputResolution = resolution;
Console.WriteLine("Current directory: " + Environment.CurrentDirectory);
Console.WriteLine("Runnung in {0}-bit mode.", Environment.Is64BitProcess ? "64" : "32");
Console.WriteLine($"FFmpeg version info: {ffmpeg.av_version_info()}");
//FFMPEG initialization
_pFormatContext = ffmpeg.avformat_alloc_context();
var pFormatContext = _pFormatContext;
//ffmpeg.avformat_open_input(&pFormatContext, url, null, null).ThrowExceptionIfError();
ffmpeg.avformat_find_stream_info(_pFormatContext, null).ThrowExceptionIfError();
// find the first video stream
//AVStream* pStream = null;
//for (var i = 0; i < _pFormatContext->nb_streams; i++)
// if (_pFormatContext->streams[i]->codec->codec_type == AVMediaType.AVMEDIA_TYPE_VIDEO)
// {
// pStream = _pFormatContext->streams[i];
// break;
//}
//if (pStream == null) throw new InvalidOperationException("Could not found video stream.");
// GET DECODER FOR STREAM
//_streamIndex = pStream->index;
//_pCodecContext = pStream->codec;
//var codecId = _pCodecContext->codec_id;
var codecId = FormatHelper.OT2ToFFmpeg(configuration.codec);
var pCodec = ffmpeg.avcodec_find_decoder(codecId);
_pCodecContext = ffmpeg.avcodec_alloc_context3(pCodec);
if (pCodec == null)
{
throw new InvalidOperationException("Unsupported codec.");
}
ffmpeg.avcodec_open2(_pCodecContext, pCodec, null).ThrowExceptionIfError();
var codecName = ffmpeg.avcodec_get_name(codecId);
var pixelFormat = _pCodecContext->pix_fmt;
// ALLOC FRAME AND PACKET
packet = ffmpeg.av_packet_alloc();
frame = ffmpeg.av_frame_alloc();
decodingThread = new Thread(DecodeFrames);
}
public VideoFrameConverter(DecoderConfiguration decoderConfiguration)
{
configuration = decoderConfiguration;
_pConvertContext = ffmpeg.sws_getContext(configuration.inputResolution.width, configuration.inputResolution.height,
FormatHelper.OT2ToFFmpeg(configuration.inputPixelFormat),
configuration.outputResolution.width,
configuration.outputResolution.height, FormatHelper.OT2ToFFmpeg(configuration.outputPixelFormat),
ffmpeg.SWS_FAST_BILINEAR, null, null, null);
if (_pConvertContext == null)
{
throw new ApplicationException("Could not initialize the conversion context.");
}
var convertedFrameBufferSize = ffmpeg.av_image_get_buffer_size(FormatHelper.OT2ToFFmpeg(configuration.outputPixelFormat)
, configuration.outputResolution.width, configuration.outputResolution.height, 1);
_convertedFrameBufferPtr = Marshal.AllocHGlobal(convertedFrameBufferSize);
_dstData = new byte_ptrArray4();
_dstLinesize = new int_array4();
ffmpeg.av_image_fill_arrays(ref _dstData, ref _dstLinesize, (byte *)_convertedFrameBufferPtr, FormatHelper.OT2ToFFmpeg(configuration.outputPixelFormat)
, configuration.outputResolution.width, configuration.outputResolution.height, 1);
}
