cuvid_video_source.cpp 4.18 KB
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
//  By downloading, copying, installing or using the software you agree to this license.
//  If you do not agree to this license, do not download, install,
//  copy or use the software.
//
//
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//                           License Agreement
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//                For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
//   * Redistribution's of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
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//   * Redistribution's in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
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//   * The name of the copyright holders may not be used to endorse or promote products
//     derived from this software without specific prior written permission.
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// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
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//M*/

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#include "cuvid_video_source.h"
#include "cu_safe_call.h"
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#if defined(HAVE_CUDA) && defined(HAVE_NVCUVID)
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cv::gpu::detail::CuvidVideoSource::CuvidVideoSource(const std::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
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    CUresult res = cuvidCreateVideoSource(&videoSource_, fname.c_str(), &params);
    if (res == CUDA_ERROR_INVALID_SOURCE)
        throw std::runtime_error("Unsupported video source");
    cuSafeCall( res );
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    CUVIDEOFORMAT vidfmt;
    cuSafeCall( cuvidGetSourceVideoFormat(videoSource_, &vidfmt, 0) );

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    format_.codec = static_cast<VideoReader_GPU::Codec>(vidfmt.codec);
    format_.chromaFormat = static_cast<VideoReader_GPU::ChromaFormat>(vidfmt.chroma_format);
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    format_.width = vidfmt.coded_width;
    format_.height = vidfmt.coded_height;
}

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cv::gpu::VideoReader_GPU::FormatInfo cv::gpu::detail::CuvidVideoSource::format() const
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{
    return format_;
}

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void cv::gpu::detail::CuvidVideoSource::start()
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{
    cuSafeCall( cuvidSetVideoSourceState(videoSource_, cudaVideoState_Started) );
}

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void cv::gpu::detail::CuvidVideoSource::stop()
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{
    cuSafeCall( cuvidSetVideoSourceState(videoSource_, cudaVideoState_Stopped) );
}

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bool cv::gpu::detail::CuvidVideoSource::isStarted() const
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{
    return (cuvidGetVideoSourceState(videoSource_) == cudaVideoState_Started);
}

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bool cv::gpu::detail::CuvidVideoSource::hasError() const
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{
    return (cuvidGetVideoSourceState(videoSource_) == cudaVideoState_Error);
}

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int CUDAAPI cv::gpu::detail::CuvidVideoSource::HandleVideoData(void* userData, CUVIDSOURCEDATAPACKET* packet)
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{
    CuvidVideoSource* thiz = static_cast<CuvidVideoSource*>(userData);

    return thiz->parseVideoData(packet->payload, packet->payload_size, (packet->flags & CUVID_PKT_ENDOFSTREAM) != 0);
}

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#endif // defined(HAVE_CUDA) && !defined(__APPLE__)