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119 lines
4.0 KiB
C++
119 lines
4.0 KiB
C++
/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
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// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of the copyright holders may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#include "precomp.hpp"
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#ifdef HAVE_NVCUVID
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cv::cudacodec::detail::FrameQueue::FrameQueue() :
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endOfDecode_(0),
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framesInQueue_(0),
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readPosition_(0)
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{
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std::memset(displayQueue_, 0, sizeof(displayQueue_));
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std::memset((void*) isFrameInUse_, 0, sizeof(isFrameInUse_));
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}
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bool cv::cudacodec::detail::FrameQueue::waitUntilFrameAvailable(int pictureIndex)
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{
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while (isInUse(pictureIndex))
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{
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// Decoder is getting too far ahead from display
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Thread::sleep(1);
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if (isEndOfDecode())
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return false;
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}
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return true;
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}
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void cv::cudacodec::detail::FrameQueue::enqueue(const CUVIDPARSERDISPINFO* picParams)
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{
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// Mark the frame as 'in-use' so we don't re-use it for decoding until it is no longer needed
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// for display
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isFrameInUse_[picParams->picture_index] = true;
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// Wait until we have a free entry in the display queue (should never block if we have enough entries)
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do
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{
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bool isFramePlaced = false;
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{
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AutoLock autoLock(mtx_);
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if (framesInQueue_ < MaximumSize)
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{
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int writePosition = (readPosition_ + framesInQueue_) % MaximumSize;
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displayQueue_[writePosition] = *picParams;
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framesInQueue_++;
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isFramePlaced = true;
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}
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}
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if (isFramePlaced) // Done
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break;
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// Wait a bit
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Thread::sleep(1);
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} while (!isEndOfDecode());
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}
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bool cv::cudacodec::detail::FrameQueue::dequeue(CUVIDPARSERDISPINFO& displayInfo)
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{
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AutoLock autoLock(mtx_);
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if (framesInQueue_ > 0)
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{
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int entry = readPosition_;
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displayInfo = displayQueue_[entry];
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readPosition_ = (entry + 1) % MaximumSize;
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framesInQueue_--;
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return true;
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}
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return false;
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}
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#endif // HAVE_NVCUVID
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