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104 lines
4.0 KiB
C++
104 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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// 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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#ifndef __FRAME_QUEUE_H__
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#define __FRAME_QUEUE_H__
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#include "precomp.hpp"
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#include "thread_wrappers.h"
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#if defined(HAVE_CUDA) && !defined(__APPLE__)
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namespace cv { namespace gpu
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{
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namespace detail
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{
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class FrameQueue
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{
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public:
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static const int MaximumSize = 20; // MAX_FRM_CNT;
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FrameQueue();
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void endDecode() { endOfDecode_ = true; }
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bool isEndOfDecode() const { return endOfDecode_ != 0;}
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// Spins until frame becomes available or decoding gets canceled.
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// If the requested frame is available the method returns true.
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// If decoding was interupted before the requested frame becomes
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// available, the method returns false.
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bool waitUntilFrameAvailable(int pictureIndex);
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void enqueue(const CUVIDPARSERDISPINFO* picParams);
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// Deque the next frame.
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// Parameters:
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// displayInfo - New frame info gets placed into this object.
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// Returns:
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// true, if a new frame was returned,
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// false, if the queue was empty and no new frame could be returned.
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bool dequeue(CUVIDPARSERDISPINFO& displayInfo);
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void releaseFrame(const CUVIDPARSERDISPINFO& picParams) { isFrameInUse_[picParams.picture_index] = false; }
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private:
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FrameQueue(const FrameQueue&);
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FrameQueue& operator =(const FrameQueue&);
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bool isInUse(int pictureIndex) const { return isFrameInUse_[pictureIndex] != 0; }
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CriticalSection criticalSection_;
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volatile int isFrameInUse_[MaximumSize];
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volatile int endOfDecode_;
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int framesInQueue_;
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int readPosition_;
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CUVIDPARSERDISPINFO displayQueue_[MaximumSize];
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};
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}
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}}
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#endif // HAVE_CUDA
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#endif // __FRAME_QUEUE_H__
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