/engines/sci/video/seq_decoder.h
C Header | 90 lines | 50 code | 16 blank | 24 comment | 0 complexity | 241a9103cce8b1e7f25653484c542ea2 MD5 | raw file
Possible License(s): GPL-3.0, LGPL-2.1, GPL-2.0
- /* ScummVM - Graphic Adventure Engine
- *
- * ScummVM is the legal property of its developers, whose names
- * are too numerous to list here. Please refer to the COPYRIGHT
- * file distributed with this source distribution.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- */
- #ifndef SCI_VIDEO_SEQ_DECODER_H
- #define SCI_VIDEO_SEQ_DECODER_H
- #include "common/rational.h"
- #include "graphics/pixelformat.h"
- #include "video/video_decoder.h"
- namespace Common {
- class SeekableReadStream;
- }
- namespace Graphics {
- struct Surface;
- }
- namespace Sci {
- /**
- * Implementation of the Sierra SEQ decoder, used in KQ6 DOS floppy/CD and GK1 DOS
- */
- class SEQDecoder : public Video::VideoDecoder {
- public:
- SEQDecoder(uint frameDelay);
- ~SEQDecoder() override;
- bool loadStream(Common::SeekableReadStream *stream) override;
- private:
- class SEQVideoTrack : public FixedRateVideoTrack {
- public:
- SEQVideoTrack(Common::SeekableReadStream *stream, uint frameDelay);
- ~SEQVideoTrack() override;
- uint16 getWidth() const override { return SEQ_SCREEN_WIDTH; }
- uint16 getHeight() const override { return SEQ_SCREEN_HEIGHT; }
- Graphics::PixelFormat getPixelFormat() const override { return Graphics::PixelFormat::createFormatCLUT8(); }
- int getCurFrame() const override { return _curFrame; }
- int getFrameCount() const override { return _frameCount; }
- const Graphics::Surface *decodeNextFrame() override;
- const byte *getPalette() const override;
- bool hasDirtyPalette() const override { return _dirtyPalette; }
- protected:
- Common::Rational getFrameRate() const override { return Common::Rational(60, _frameDelay); }
- private:
- enum {
- SEQ_SCREEN_WIDTH = 320,
- SEQ_SCREEN_HEIGHT = 200
- };
- void readPaletteChunk(uint16 chunkSize);
- bool decodeFrame(byte *rleData, int rleSize, byte *litData, int litSize, byte *dest, int left, int width, int height, int colorKey);
- Common::SeekableReadStream *_fileStream;
- int _curFrame, _frameCount;
- byte _palette[256 * 3];
- mutable bool _dirtyPalette;
- Graphics::Surface *_surface;
- uint _frameDelay;
- };
- uint _frameDelay;
- };
- } // End of namespace Sci
- #endif