mirror of
https://github.com/libretro/scummvm.git
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184 lines
5.2 KiB
C++
184 lines
5.2 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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//
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// Partially based on ffmpeg code.
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//
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// Copyright (c) 2001 Fabrice Bellard.
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// First version by Francois Revol revol@free.fr
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// Seek function by Gael Chardon gael.dev@4now.net
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//
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#ifndef VIDEO_QT_DECODER_H
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#define VIDEO_QT_DECODER_H
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#include "audio/decoders/quicktime_intern.h"
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#include "common/scummsys.h"
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#include "video/video_decoder.h"
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namespace Common {
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class Rational;
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}
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namespace Graphics {
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struct PixelFormat;
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}
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namespace Image {
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class Codec;
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}
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namespace Video {
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/**
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* Decoder for QuickTime videos.
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*
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* Video decoder used in engines:
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* - mohawk
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* - pegasus
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* - sci
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*/
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class QuickTimeDecoder : public VideoDecoder, public Audio::QuickTimeAudioDecoder {
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public:
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QuickTimeDecoder();
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virtual ~QuickTimeDecoder();
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bool loadFile(const Common::Path &filename);
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bool loadStream(Common::SeekableReadStream *stream);
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void close();
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uint16 getWidth() const { return _width; }
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uint16 getHeight() const { return _height; }
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const Graphics::Surface *decodeNextFrame();
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Audio::Timestamp getDuration() const { return Audio::Timestamp(0, _duration, _timeScale); }
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protected:
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Common::QuickTimeParser::SampleDesc *readSampleDesc(Common::QuickTimeParser::Track *track, uint32 format, uint32 descSize);
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private:
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void init();
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void updateAudioBuffer();
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uint16 _width, _height;
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Graphics::Surface *_scaledSurface;
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void scaleSurface(const Graphics::Surface *src, Graphics::Surface *dst,
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const Common::Rational &scaleFactorX, const Common::Rational &scaleFactorY);
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class VideoSampleDesc : public Common::QuickTimeParser::SampleDesc {
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public:
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VideoSampleDesc(Common::QuickTimeParser::Track *parentTrack, uint32 codecTag);
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~VideoSampleDesc();
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void initCodec();
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// TODO: Make private in the long run
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uint16 _bitsPerSample;
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char _codecName[32];
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uint16 _colorTableId;
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byte *_palette;
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Image::Codec *_videoCodec;
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};
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// The AudioTrackHandler is currently just a wrapper around some
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// QuickTimeDecoder functions.
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class AudioTrackHandler : public SeekableAudioTrack {
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public:
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AudioTrackHandler(QuickTimeDecoder *decoder, QuickTimeAudioTrack *audioTrack);
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void updateBuffer();
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protected:
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Audio::SeekableAudioStream *getSeekableAudioStream() const;
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private:
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QuickTimeDecoder *_decoder;
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QuickTimeAudioTrack *_audioTrack;
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};
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// The VideoTrackHandler is the bridge between the time of playback
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// and the media for the given track. It calculates when to start
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// tracks and at what rate to play the media using the edit list.
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class VideoTrackHandler : public VideoTrack {
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public:
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VideoTrackHandler(QuickTimeDecoder *decoder, Common::QuickTimeParser::Track *parent);
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~VideoTrackHandler();
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bool endOfTrack() const;
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bool isSeekable() const { return true; }
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bool seek(const Audio::Timestamp &time);
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Audio::Timestamp getDuration() const;
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uint16 getWidth() const;
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uint16 getHeight() const;
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Graphics::PixelFormat getPixelFormat() const;
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int getCurFrame() const { return _curFrame; }
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int getFrameCount() const;
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uint32 getNextFrameStartTime() const;
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const Graphics::Surface *decodeNextFrame();
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const byte *getPalette() const;
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bool hasDirtyPalette() const { return _curPalette; }
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bool setReverse(bool reverse);
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bool isReversed() const { return _reversed; }
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bool canDither() const;
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void setDither(const byte *palette);
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Common::Rational getScaledWidth() const;
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Common::Rational getScaledHeight() const;
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private:
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QuickTimeDecoder *_decoder;
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Common::QuickTimeParser::Track *_parent;
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uint32 _curEdit;
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int32 _curFrame;
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uint32 _nextFrameStartTime;
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Graphics::Surface *_scaledSurface;
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int32 _durationOverride;
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const byte *_curPalette;
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mutable bool _dirtyPalette;
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bool _reversed;
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// Forced dithering of frames
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byte *_forcedDitherPalette;
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byte *_ditherTable;
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Graphics::Surface *_ditherFrame;
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const Graphics::Surface *forceDither(const Graphics::Surface &frame);
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Common::SeekableReadStream *getNextFramePacket(uint32 &descId);
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uint32 getFrameDuration();
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uint32 findKeyFrame(uint32 frame) const;
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void enterNewEditList(bool bufferFrames);
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const Graphics::Surface *bufferNextFrame();
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uint32 getRateAdjustedFrameTime() const;
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uint32 getCurEditTimeOffset() const;
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uint32 getCurEditTrackDuration() const;
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bool atLastEdit() const;
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bool endOfCurEdit() const;
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void checkEditListBounds();
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};
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};
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} // End of namespace Video
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#endif
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