mirror of
https://github.com/libretro/scummvm.git
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133 lines
4.2 KiB
C++
133 lines
4.2 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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#ifndef VIDEO_HNM_DECODER_H
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#define VIDEO_HNM_DECODER_H
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#include "common/rational.h"
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#include "graphics/pixelformat.h"
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#include "video/video_decoder.h"
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#include "graphics/surface.h"
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#include "audio/audiostream.h"
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namespace Common {
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class SeekableReadStream;
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}
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namespace Video {
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/**
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* Decoder for HNM videos.
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*
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* Video decoder used in engines:
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* - cryo
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* - cryomni3d
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*/
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class HNMDecoder : public VideoDecoder {
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public:
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HNMDecoder(bool loop = false, byte *initialPalette = nullptr);
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~HNMDecoder() override;
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bool loadStream(Common::SeekableReadStream *stream) override;
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void readNextPacket() override;
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void close() override;
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void setRegularFrameDelay(uint32 regularFrameDelay) { _regularFrameDelay = regularFrameDelay; }
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private:
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class HNM4VideoTrack : public VideoTrack {
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public:
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HNM4VideoTrack(uint32 width, uint32 height, uint32 frameSize, uint32 frameCount,
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uint32 regularFrameDelay, const byte *initialPalette = nullptr);
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~HNM4VideoTrack() override;
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// When _frameCount is 0, it means we are looping
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bool endOfTrack() const override { return (_frameCount == 0) ? false : VideoTrack::endOfTrack(); }
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uint16 getWidth() const override { return _surface.w; }
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uint16 getHeight() const override { return _surface.h; }
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Graphics::PixelFormat getPixelFormat() const override { return _surface.format; }
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int getCurFrame() const override { return _curFrame; }
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int getFrameCount() const override { return _frameCount; }
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uint32 getNextFrameStartTime() const override { return _nextFrameStartTime; }
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const Graphics::Surface *decodeNextFrame() override { return &_surface; }
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const byte *getPalette() const override { _dirtyPalette = false; return _palette; }
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bool hasDirtyPalette() const override { return _dirtyPalette; }
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/** Decode a video chunk. */
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void decodePalette(Common::SeekableReadStream *stream, uint32 size);
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void decodeInterframe(Common::SeekableReadStream *stream, uint32 size);
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void decodeInterframeA(Common::SeekableReadStream *stream, uint32 size);
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void decodeIntraframe(Common::SeekableReadStream *stream, uint32 size);
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void presentFrame(uint16 flags);
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void restart() { _nextFrameDelay = uint32(-1); _nextNextFrameDelay = uint32(-1); }
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void setFrameDelay(uint32 frameDelay);
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private:
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Graphics::Surface _surface;
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uint32 _regularFrameDelay;
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uint32 _nextFrameDelay;
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uint32 _nextNextFrameDelay;
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uint32 _nextFrameStartTime;
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uint32 _frameCount;
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int _curFrame;
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byte _palette[256 * 3];
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mutable bool _dirtyPalette;
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byte *_frameBufferF;
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byte *_frameBufferC;
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byte *_frameBufferP;
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};
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class DPCMAudioTrack : public AudioTrack {
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public:
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DPCMAudioTrack(uint16 format, uint16 bits, uint sampleRate,
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Audio::Mixer::SoundType soundType);
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~DPCMAudioTrack() override;
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Audio::Timestamp decodeSound(Common::SeekableReadStream *stream, uint32 size);
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protected:
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Audio::AudioStream *getAudioStream() const override { return _audioStream; }
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private:
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Audio::QueuingAudioStream *_audioStream;
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bool _gotLUT;
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uint16 _lut[256];
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uint16 _lastSample;
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};
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bool _loop;
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byte *_initialPalette;
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uint32 _regularFrameDelay;
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// These two pointer are owned by VideoDecoder
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HNM4VideoTrack *_videoTrack;
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DPCMAudioTrack *_audioTrack;
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Common::SeekableReadStream *_stream;
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};
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} // End of namespace Video
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#endif
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