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11//                For Open Source Computer Vision Library
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43
44#include "precomp.hpp"
45
46#ifdef HAVE_NVCUVID
47
48using namespace cv;
49using namespace cv::cudacodec;
50using namespace cv::cudacodec::detail;
51
52cv::cudacodec::detail::CuvidVideoSource::CuvidVideoSource(const String& fname)
53{
54    CUVIDSOURCEPARAMS params;
55    std::memset(&params, 0, sizeof(CUVIDSOURCEPARAMS));
56
57    // Fill parameter struct
58    params.pUserData = this;                        // will be passed to data handlers
59    params.pfnVideoDataHandler = HandleVideoData;   // our local video-handler callback
60    params.pfnAudioDataHandler = 0;
61
62    // now create the actual source
63    CUresult cuRes = cuvidCreateVideoSource(&videoSource_, fname.c_str(), &params);
64    if (cuRes == CUDA_ERROR_INVALID_SOURCE)
65        throw std::runtime_error("");
66    cuSafeCall( cuRes );
67
68    CUVIDEOFORMAT vidfmt;
69    cuSafeCall( cuvidGetSourceVideoFormat(videoSource_, &vidfmt, 0) );
70
71    format_.codec = static_cast<Codec>(vidfmt.codec);
72    format_.chromaFormat = static_cast<ChromaFormat>(vidfmt.chroma_format);
73    format_.width = vidfmt.coded_width;
74    format_.height = vidfmt.coded_height;
75}
76
77cv::cudacodec::detail::CuvidVideoSource::~CuvidVideoSource()
78{
79    cuvidDestroyVideoSource(videoSource_);
80}
81
82FormatInfo cv::cudacodec::detail::CuvidVideoSource::format() const
83{
84    return format_;
85}
86
87void cv::cudacodec::detail::CuvidVideoSource::start()
88{
89    cuSafeCall( cuvidSetVideoSourceState(videoSource_, cudaVideoState_Started) );
90}
91
92void cv::cudacodec::detail::CuvidVideoSource::stop()
93{
94    cuSafeCall( cuvidSetVideoSourceState(videoSource_, cudaVideoState_Stopped) );
95}
96
97bool cv::cudacodec::detail::CuvidVideoSource::isStarted() const
98{
99    return (cuvidGetVideoSourceState(videoSource_) == cudaVideoState_Started);
100}
101
102bool cv::cudacodec::detail::CuvidVideoSource::hasError() const
103{
104    return (cuvidGetVideoSourceState(videoSource_) == cudaVideoState_Error);
105}
106
107int CUDAAPI cv::cudacodec::detail::CuvidVideoSource::HandleVideoData(void* userData, CUVIDSOURCEDATAPACKET* packet)
108{
109    CuvidVideoSource* thiz = static_cast<CuvidVideoSource*>(userData);
110
111    return thiz->parseVideoData(packet->payload, packet->payload_size, (packet->flags & CUVID_PKT_ENDOFSTREAM) != 0);
112}
113
114#endif // HAVE_NVCUVID
115