opencv/modules/gpu/src/cuvid_video_source.cpp

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#include "cuvid_video_source.h"
#include "cu_safe_call.h"
#if defined(HAVE_CUDA) && defined(HAVE_NVCUVID)
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cv::gpu::detail::CuvidVideoSource::CuvidVideoSource(const String& fname)
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{
CUVIDSOURCEPARAMS params;
std::memset(&params, 0, sizeof(CUVIDSOURCEPARAMS));
// Fill parameter struct
params.pUserData = this; // will be passed to data handlers
params.pfnVideoDataHandler = HandleVideoData; // our local video-handler callback
params.pfnAudioDataHandler = 0;
// now create the actual source
CUresult res = cuvidCreateVideoSource(&videoSource_, fname.c_str(), &params);
if (res == CUDA_ERROR_INVALID_SOURCE)
throw std::runtime_error("Unsupported video source");
cuSafeCall( res );
CUVIDEOFORMAT vidfmt;
cuSafeCall( cuvidGetSourceVideoFormat(videoSource_, &vidfmt, 0) );
format_.codec = static_cast<VideoReader_GPU::Codec>(vidfmt.codec);
format_.chromaFormat = static_cast<VideoReader_GPU::ChromaFormat>(vidfmt.chroma_format);
format_.width = vidfmt.coded_width;
format_.height = vidfmt.coded_height;
}
cv::gpu::VideoReader_GPU::FormatInfo cv::gpu::detail::CuvidVideoSource::format() const
{
return format_;
}
void cv::gpu::detail::CuvidVideoSource::start()
{
cuSafeCall( cuvidSetVideoSourceState(videoSource_, cudaVideoState_Started) );
}
void cv::gpu::detail::CuvidVideoSource::stop()
{
cuSafeCall( cuvidSetVideoSourceState(videoSource_, cudaVideoState_Stopped) );
}
bool cv::gpu::detail::CuvidVideoSource::isStarted() const
{
return (cuvidGetVideoSourceState(videoSource_) == cudaVideoState_Started);
}
bool cv::gpu::detail::CuvidVideoSource::hasError() const
{
return (cuvidGetVideoSourceState(videoSource_) == cudaVideoState_Error);
}
int CUDAAPI cv::gpu::detail::CuvidVideoSource::HandleVideoData(void* userData, CUVIDSOURCEDATAPACKET* packet)
{
CuvidVideoSource* thiz = static_cast<CuvidVideoSource*>(userData);
return thiz->parseVideoData(packet->payload, packet->payload_size, (packet->flags & CUVID_PKT_ENDOFSTREAM) != 0);
}
#endif // defined(HAVE_CUDA) && !defined(__APPLE__)