Aegisub/aegisub/video_provider_cache.h
Karl Blomster 893ff2f78a Major rewrite of the video providing system. Hilights:
- It is now the responsibility of each video provider to provide a list of keyframe positions and (if it can) timecodes.
- The ffmpeg video provider now indexes files before opening them and does no longer rely on stream->duration to determine the number of frames. Fixes opening of MKV files, but it does not (currently) open timecodes automatically and reported keyframe positions seem way off. Status of frame-accuracy with MKV files unknown but it may very well work.
- Modified the way the ffmpeg video provider seeks (inspired by code from Myrsloik's ffmpegsource). Should no longer lose the first frame and should also no longer be frame-inaccurate, at least not with AVI.
- DirectShow video provider may or may not be completely broken, not tested.

Originally committed to SVN as r2252.
2008-07-15 00:08:05 +00:00

98 lines
3.4 KiB
C++

// 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();
// Subtitles
virtual SubtitlesProvider *GetAsSubtitlesProvider(); // Get subtitles provider
// 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();
};