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95d7c012d6
Since the returned int values from the decoding functions are just 0 for good or -1 for error, have changed these into an errorFlag bool. This improves readability and cleans up some of the error checking code. In addition, have fixed some oversights in formatting spacing for readability.
73 lines
2.4 KiB
C++
73 lines
2.4 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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* 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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* 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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#ifndef VIDEO_CODECS_SVQ1_H
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#define VIDEO_CODECS_SVQ1_H
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#include "video/codecs/codec.h"
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namespace Common {
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class BitStream;
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class Huffman;
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class Point;
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}
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namespace Video {
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class SVQ1Decoder : public Codec {
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public:
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SVQ1Decoder(uint16 width, uint16 height);
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~SVQ1Decoder();
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const Graphics::Surface *decodeImage(Common::SeekableReadStream *stream);
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Graphics::PixelFormat getPixelFormat() const { return _surface->format; }
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private:
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Graphics::Surface *_surface;
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uint16 _width, _height;
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uint16 _frameWidth, _frameHeight;
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byte *_last[3];
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Common::Huffman *_blockType;
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Common::Huffman *_intraMultistage[6];
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Common::Huffman *_interMultistage[6];
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Common::Huffman *_intraMean;
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Common::Huffman *_interMean;
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Common::Huffman *_motionComponent;
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bool svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int pitch);
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bool svq1DecodeBlockNonIntra(Common::BitStream *s, uint8 *pixels, int pitch);
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bool svq1DecodeMotionVector(Common::BitStream *s, Common::Point *mv, Common::Point **pmv);
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void svq1SkipBlock(uint8 *current, uint8 *previous, int pitch, int x, int y);
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bool svq1MotionInterBlock(Common::BitStream *ss, uint8 *current, uint8 *previous, int pitch,
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Common::Point *motion, int x, int y);
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bool svq1MotionInter4vBlock(Common::BitStream *ss, uint8 *current, uint8 *previous, int pitch,
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Common::Point *motion, int x, int y);
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bool svq1DecodeDeltaBlock(Common::BitStream *ss, uint8 *current, uint8 *previous, int pitch,
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Common::Point *motion, int x, int y);
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};
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} // End of namespace Video
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#endif
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