1 /*M/////////////////////////////////////////////////////////////////////////////////////// 2 // 3 // IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. 4 // 5 // By downloading, copying, installing or using the software you agree to this license. 6 // If you do not agree to this license, do not download, install, 7 // copy or use the software. 8 // 9 // 10 // License Agreement 11 // For Open Source Computer Vision Library 12 // 13 // Copyright (C) 2000-2008, Intel Corporation, all rights reserved. 14 // Copyright (C) 2009, Willow Garage Inc., all rights reserved. 15 // Copyright (C) 2013, OpenCV Foundation, all rights reserved. 16 // Third party copyrights are property of their respective owners. 17 // 18 // Redistribution and use in source and binary forms, with or without modification, 19 // are permitted provided that the following conditions are met: 20 // 21 // * Redistribution's of source code must retain the above copyright notice, 22 // this list of conditions and the following disclaimer. 23 // 24 // * Redistribution's in binary form must reproduce the above copyright notice, 25 // this list of conditions and the following disclaimer in the documentation 26 // and/or other materials provided with the distribution. 27 // 28 // * The name of the copyright holders may not be used to endorse or promote products 29 // derived from this software without specific prior written permission. 30 // 31 // This software is provided by the copyright holders and contributors "as is" and 32 // any express or implied warranties, including, but not limited to, the implied 33 // warranties of merchantability and fitness for a particular purpose are disclaimed. 34 // In no event shall the Intel Corporation or contributors be liable for any direct, 35 // indirect, incidental, special, exemplary, or consequential damages 36 // (including, but not limited to, procurement of substitute goods or services; 37 // loss of use, data, or profits; or business interruption) however caused 38 // and on any theory of liability, whether in contract, strict liability, 39 // or tort (including negligence or otherwise) arising in any way out of 40 // the use of this software, even if advised of the possibility of such damage. 41 // 42 //M*/ 43 44 #ifndef __FRAME_QUEUE_HPP__ 45 #define __FRAME_QUEUE_HPP__ 46 47 #include "opencv2/core/utility.hpp" 48 #include "opencv2/core/private.cuda.hpp" 49 50 #include <nvcuvid.h> 51 52 namespace cv { namespace cudacodec { namespace detail 53 { 54 55 class FrameQueue 56 { 57 public: 58 static const int MaximumSize = 20; // MAX_FRM_CNT; 59 60 FrameQueue(); 61 62 void endDecode() { endOfDecode_ = true; } 63 bool isEndOfDecode() const { return endOfDecode_ != 0;} 64 65 // Spins until frame becomes available or decoding gets canceled. 66 // If the requested frame is available the method returns true. 67 // If decoding was interupted before the requested frame becomes 68 // available, the method returns false. 69 bool waitUntilFrameAvailable(int pictureIndex); 70 71 void enqueue(const CUVIDPARSERDISPINFO* picParams); 72 73 // Deque the next frame. 74 // Parameters: 75 // displayInfo - New frame info gets placed into this object. 76 // Returns: 77 // true, if a new frame was returned, 78 // false, if the queue was empty and no new frame could be returned. 79 bool dequeue(CUVIDPARSERDISPINFO& displayInfo); 80 81 void releaseFrame(const CUVIDPARSERDISPINFO& picParams) { isFrameInUse_[picParams.picture_index] = false; } 82 83 private: 84 bool isInUse(int pictureIndex) const { return isFrameInUse_[pictureIndex] != 0; } 85 86 Mutex mtx_; 87 88 volatile int isFrameInUse_[MaximumSize]; 89 volatile int endOfDecode_; 90 91 int framesInQueue_; 92 int readPosition_; 93 CUVIDPARSERDISPINFO displayQueue_[MaximumSize]; 94 }; 95 96 }}} 97 98 #endif // __FRAME_QUEUE_HPP__ 99
