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 48cv::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 57bool 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 71void 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 102bool 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