Aegisub/aegisub/src/include/aegisub/video_provider.h

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// Copyright (c) 2006-2008, 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 Project http://www.aegisub.org/
//
// $Id$
/// @file video_provider.h
/// @brief Declaration of base-class for video providers
/// @ingroup main_headers video_input
///
#pragma once
//////////
// Headers
#include "aegisub.h"
#include "vfr.h"
#include "video_frame.h"
/// @class VideoProvider
/// @brief DOCME
///
/// DOCME
class VideoProvider {
public:
/// @brief // Virtual destructor
/// @return
///
virtual ~VideoProvider() {}
// Override this method to actually get frames
virtual const AegiVideoFrame GetFrame(int n)=0;
// Override the following methods to get video information:
virtual int GetPosition()=0; // Get the number of the last frame loaded
virtual int GetFrameCount()=0; // Get total number of frames
virtual int GetWidth()=0; // Returns the video width in pixels
virtual int GetHeight()=0; // Returns the video height in pixels
virtual double GetFPS()=0; // Get framerate in frames per second
virtual bool AreKeyFramesLoaded()=0; // Returns true if keyframe info is loaded, false otherwise
virtual bool IsVFR()=0; // Returns true if video is VFR
virtual wxArrayInt GetKeyFrames()=0; // Returns list of keyframes
virtual FrameRate GetTrueFrameRate()=0; // Returns magic VFR stuff
/// @brief // Use this to set any post-loading warnings, such as "being loaded with unreliable seeking"
/// @return
///
virtual wxString GetWarning() { return L""; }
/// @brief // Name of decoder, e.g. "Avisynth/FFMpegSource"
/// @return
///
virtual wxString GetDecoderName() { return L"Unknown"; }
/// @brief // How many frames does this provider want Aegisub to cache? Set to 0 if it doesn't require caching.
/// @return
///
virtual bool WantsCaching() { return false; }
/// @brief // For "special" providers that don't deal well with VFR (i.e. Avisynth)
/// @return
///
virtual bool NeedsVFRHack() { return false; }; // Returns true if provider needs special VFR treatment
/// @brief DOCME
/// @return
///
virtual bool IsNativelyByFrames() { return true; };
/// @brief DOCME
/// @param list
///
virtual void OverrideFrameTimeList(std::vector<int> list) {} // Override the list with the provided one, for VFR handling
};
/// @class VideoProviderFactory
/// @brief DOCME
///
/// DOCME
class VideoProviderFactory {
public:
/// @brief DOCME
///
virtual ~VideoProviderFactory() {}
virtual VideoProvider *CreateProvider(wxString video)=0;
};