OpenCV_4.2.0/opencv_contrib-4.2.0/modules/cudacodec/src/video_decoder.cpp

147 lines
6.5 KiB
C++

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#include "precomp.hpp"
#ifdef HAVE_NVCUVID
void cv::cudacodec::detail::VideoDecoder::create(const FormatInfo& videoFormat)
{
if (videoFormat.nBitDepthMinus8 > 0 || videoFormat.chromaFormat != YUV420)
CV_Error(Error::StsUnsupportedFormat, "NV12 output requires 8 bit YUV420");
cudaVideoCodec _codec = static_cast<cudaVideoCodec>(videoFormat.codec);
cudaVideoChromaFormat _chromaFormat = static_cast<cudaVideoChromaFormat>(videoFormat.chromaFormat);
cudaVideoCreateFlags videoCreateFlags = (_codec == cudaVideoCodec_JPEG || _codec == cudaVideoCodec_MPEG2) ?
cudaVideoCreate_PreferCUDA :
cudaVideoCreate_PreferCUVID;
// Validate video format. These are the currently supported formats via NVCUVID
bool codecSupported = cudaVideoCodec_MPEG1 == _codec ||
cudaVideoCodec_MPEG2 == _codec ||
cudaVideoCodec_MPEG4 == _codec ||
cudaVideoCodec_VC1 == _codec ||
cudaVideoCodec_H264 == _codec ||
cudaVideoCodec_JPEG == _codec ||
cudaVideoCodec_H264_SVC == _codec ||
cudaVideoCodec_H264_MVC == _codec ||
cudaVideoCodec_YV12 == _codec ||
cudaVideoCodec_NV12 == _codec ||
cudaVideoCodec_YUYV == _codec ||
cudaVideoCodec_UYVY == _codec;
#if defined (HAVE_CUDA)
#if (CUDART_VERSION >= 6500)
codecSupported |= cudaVideoCodec_HEVC == _codec;
#endif
#if ((CUDART_VERSION == 7500) || (CUDART_VERSION >= 9000))
codecSupported |= cudaVideoCodec_VP8 == _codec ||
cudaVideoCodec_VP9 == _codec ||
cudaVideoCodec_YUV420 == _codec;
#endif
#endif
CV_Assert(codecSupported);
CV_Assert( cudaVideoChromaFormat_Monochrome == _chromaFormat ||
cudaVideoChromaFormat_420 == _chromaFormat ||
cudaVideoChromaFormat_422 == _chromaFormat ||
cudaVideoChromaFormat_444 == _chromaFormat);
#if (CUDART_VERSION >= 9000)
// Check video format is supported by GPU's hardware video decoder
CUVIDDECODECAPS decodeCaps = {};
decodeCaps.eCodecType = _codec;
decodeCaps.eChromaFormat = _chromaFormat;
decodeCaps.nBitDepthMinus8 = videoFormat.nBitDepthMinus8;
cuSafeCall(cuCtxPushCurrent(ctx_));
cuSafeCall(cuvidGetDecoderCaps(&decodeCaps));
cuSafeCall(cuCtxPopCurrent(NULL));
if (!decodeCaps.bIsSupported)
CV_Error(Error::StsUnsupportedFormat, "Video source is not supported by hardware video decoder");
CV_Assert(videoFormat.width >= decodeCaps.nMinWidth &&
videoFormat.height >= decodeCaps.nMinHeight &&
videoFormat.width <= decodeCaps.nMaxWidth &&
videoFormat.height <= decodeCaps.nMaxHeight);
CV_Assert((videoFormat.width >> 4)* (videoFormat.height >> 4) <= decodeCaps.nMaxMBCount);
#endif
// Fill the decoder-create-info struct from the given video-format struct.
std::memset(&createInfo_, 0, sizeof(CUVIDDECODECREATEINFO));
// Create video decoder
createInfo_.CodecType = _codec;
createInfo_.ulWidth = videoFormat.width;
createInfo_.ulHeight = videoFormat.height;
createInfo_.ulNumDecodeSurfaces = FrameQueue::MaximumSize;
createInfo_.ChromaFormat = _chromaFormat;
createInfo_.OutputFormat = cudaVideoSurfaceFormat_NV12;
createInfo_.DeinterlaceMode = cudaVideoDeinterlaceMode_Adaptive;
// No scaling
static const int MAX_FRAME_COUNT = 2;
createInfo_.ulTargetWidth = createInfo_.ulWidth;
createInfo_.ulTargetHeight = createInfo_.ulHeight;
createInfo_.ulNumOutputSurfaces = MAX_FRAME_COUNT; // We won't simultaneously map more than 8 surfaces
createInfo_.ulCreationFlags = videoCreateFlags;
createInfo_.vidLock = lock_;
cuSafeCall(cuCtxPushCurrent(ctx_));
cuSafeCall(cuvidCreateDecoder(&decoder_, &createInfo_));
cuSafeCall(cuCtxPopCurrent(NULL));
}
void cv::cudacodec::detail::VideoDecoder::release()
{
if (decoder_)
{
cuvidDestroyDecoder(decoder_);
decoder_ = 0;
}
}
#endif // HAVE_NVCUVID