forked from mia/Aegisub
77 lines
3.2 KiB
C++
77 lines
3.2 KiB
C++
// Copyright (c) 2008, Rodrigo Braz Monteiro, Fredrik Mellbin
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions 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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// * Redistributions 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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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// 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"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Aegisub Project http://www.aegisub.org/
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//
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// $Id$
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/// @file video_provider_cache.h
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/// @see video_provider_cache.cpp
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/// @ingroup video_input
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///
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#ifndef AGI_PRE
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#include <list>
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#endif
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#include "include/aegisub/video_provider.h"
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#include <libaegisub/scoped_ptr.h>
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struct CachedFrame;
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/// @class VideoProviderCache
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/// @brief A wrapper around a video provider which provides LRU caching
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class VideoProviderCache : public VideoProvider {
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/// The source provider to get frames from
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agi::scoped_ptr<VideoProvider> master;
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/// @brief Maximum size of the cache in bytes
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///
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/// Note that this is a soft limit. The cache stops allocating new frames
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/// once it has exceeded the limit, but it never tries to shrink
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const size_t max_cache_size;
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/// Cache of video frames with the most recently used ones at the front
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std::list<CachedFrame> cache;
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public:
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VideoProviderCache(VideoProvider *master);
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~VideoProviderCache();
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const AegiVideoFrame GetFrame(int n);
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int GetFrameCount() const { return master->GetFrameCount(); }
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int GetWidth() const { return master->GetWidth(); }
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int GetHeight() const { return master->GetHeight(); }
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double GetDAR() const { return master->GetDAR(); }
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agi::vfr::Framerate GetFPS() const { return master->GetFPS(); }
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std::vector<int> GetKeyFrames() const { return master->GetKeyFrames(); }
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wxString GetWarning() const { return master->GetWarning(); }
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wxString GetDecoderName() const { return master->GetDecoderName(); }
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wxString GetColorSpace() const { return master->GetColorSpace(); }
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};
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