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Open Source Computer Vision Library
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117 lines
4.1 KiB
117 lines
4.1 KiB
/*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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// 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 "frame_queue.h" |
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#if defined(HAVE_CUDA) && !defined(__APPLE__) |
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cv::gpu::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::gpu::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::gpu::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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CriticalSection::AutoLock autoLock(criticalSection_); |
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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::gpu::detail::FrameQueue::dequeue(CUVIDPARSERDISPINFO& displayInfo) |
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{ |
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CriticalSection::AutoLock autoLock(criticalSection_); |
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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_CUDA
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