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 #include "precomp.hpp" 45 46 #ifdef HAVE_NVCUVID 47 48 cv::cudacodec::detail::FrameQueue::FrameQueue() : 49 endOfDecode_(0), 50 framesInQueue_(0), 51 readPosition_(0) 52 { 53 std::memset(displayQueue_, 0, sizeof(displayQueue_)); 54 std::memset((void*) isFrameInUse_, 0, sizeof(isFrameInUse_)); 55 } 56 57 bool cv::cudacodec::detail::FrameQueue::waitUntilFrameAvailable(int pictureIndex) 58 { 59 while (isInUse(pictureIndex)) 60 { 61 // Decoder is getting too far ahead from display 62 Thread::sleep(1); 63 64 if (isEndOfDecode()) 65 return false; 66 } 67 68 return true; 69 } 70 71 void cv::cudacodec::detail::FrameQueue::enqueue(const CUVIDPARSERDISPINFO* picParams) 72 { 73 // Mark the frame as 'in-use' so we don't re-use it for decoding until it is no longer needed 74 // for display 75 isFrameInUse_[picParams->picture_index] = true; 76 77 // Wait until we have a free entry in the display queue (should never block if we have enough entries) 78 do 79 { 80 bool isFramePlaced = false; 81 82 { 83 AutoLock autoLock(mtx_); 84 85 if (framesInQueue_ < MaximumSize) 86 { 87 int writePosition = (readPosition_ + framesInQueue_) % MaximumSize; 88 displayQueue_[writePosition] = *picParams; 89 framesInQueue_++; 90 isFramePlaced = true; 91 } 92 } 93 94 if (isFramePlaced) // Done 95 break; 96 97 // Wait a bit 98 Thread::sleep(1); 99 } while (!isEndOfDecode()); 100 } 101 102 bool cv::cudacodec::detail::FrameQueue::dequeue(CUVIDPARSERDISPINFO& displayInfo) 103 { 104 AutoLock autoLock(mtx_); 105 106 if (framesInQueue_ > 0) 107 { 108 int entry = readPosition_; 109 displayInfo = displayQueue_[entry]; 110 readPosition_ = (entry + 1) % MaximumSize; 111 framesInQueue_--; 112 return true; 113 } 114 115 return false; 116 } 117 118 #endif // HAVE_NVCUVID 119
