/*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.
//
//
//                           License Agreement
//                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.
//
//   * 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.
//
//   * The name of the copyright holders may not be used to endorse or promote products
//     derived from this software without specific prior written permission.
//
// 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,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/

#ifndef __VIDEO_PARSER_H__
#define __VIDEO_PARSER_H__

#include "precomp.hpp"

#include "frame_queue.h"
#include "video_decoder.h"

#if defined(HAVE_CUDA) && defined(HAVE_NVCUVID)

namespace cv { namespace gpu
{
    namespace detail
    {
        class VideoParser
        {
        public:
            VideoParser(VideoDecoder* videoDecoder, FrameQueue* frameQueue);

            ~VideoParser()
            {
                cuvidDestroyVideoParser(parser_);
            }

            bool parseVideoData(const unsigned char* data, size_t size, bool endOfStream);

            bool hasError() const { return hasError_; }

        private:
            VideoParser(const VideoParser&);
            VideoParser& operator =(const VideoParser&);

            VideoDecoder* videoDecoder_;
            FrameQueue* frameQueue_;
            CUvideoparser parser_;
            int unparsedPackets_;
            volatile bool hasError_;

            // Called when the decoder encounters a video format change (or initial sequence header)
            // This particular implementation of the callback returns 0 in case the video format changes
            // to something different than the original format. Returning 0 causes a stop of the app.
            static int CUDAAPI HandleVideoSequence(void* pUserData, CUVIDEOFORMAT* pFormat);

            // Called by the video parser to decode a single picture
            // Since the parser will deliver data as fast as it can, we need to make sure that the picture
            // index we're attempting to use for decode is no longer used for display
            static int CUDAAPI HandlePictureDecode(void* pUserData, CUVIDPICPARAMS* pPicParams);

            // Called by the video parser to display a video frame (in the case of field pictures, there may be
            // 2 decode calls per 1 display call, since two fields make up one frame)
            static int CUDAAPI HandlePictureDisplay(void* pUserData, CUVIDPARSERDISPINFO* pPicParams);
        };
    }
}}

#endif // HAVE_CUDA

#endif // __VIDEO_PARSER_H__
