Aegisub/aegisub/src/video_provider_cache.h

// Copyright (c) 2008, Rodrigo Braz Monteiro, Fredrik Mellbin
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of the Aegisub Group nor the names of its contributors
//     may be used to endorse or promote products derived from this software
//     without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// -----------------------------------------------------------------------------
//
// AEGISUB
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//


#pragma once


//////////
// Headers
#include <list>
#include "include/aegisub/video_provider.h"
#include "vfr.h"


////////////////
// Cached frame
class CachedFrame {
public:
	AegiVideoFrame frame;
	int n;
};


////////////////////////////
// Video Provider interface
class VideoProviderCache : public VideoProvider {
private:
	VideoProvider *master;
	unsigned int cacheMax;
	std::list<CachedFrame> cache;
	AegiVideoFrame tempRGBFrame;
	int pos;

	void Cache(int n,const AegiVideoFrame frame);
	AegiVideoFrame GetCachedFrame(int n);

protected:
	// Cache functions
	void SetCacheMax(int n_frames);
	void ClearCache();

public:
	// Base methods
	void GetFloatFrame(float* Buffer, int n);	// Get frame as float
	const AegiVideoFrame GetFrame(int n, int formatMask);
	VideoProviderCache(VideoProvider *master);
	virtual ~VideoProviderCache();

	// Override the following methods:
	virtual int GetPosition();				// Get the number of the last frame loaded
	virtual int GetFrameCount();			// Get total number of frames
	virtual int GetWidth();					// Returns the video width in pixels
	virtual int GetHeight();				// Returns the video height in pixels
	virtual double GetFPS();				// Get framerate in frames per second
	virtual bool AreKeyFramesLoaded();
	virtual bool IsVFR();
	virtual wxArrayInt GetKeyFrames();
	virtual FrameRate GetTrueFrameRate();
	virtual void OverrideFrameTimeList(Aegisub::IntArray list);	// Override the list with the provided one, for VFR handling
	virtual bool IsNativelyByFrames();
	virtual Aegisub::String GetWarning();
	virtual Aegisub::String GetDecoderName();
};