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/* 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 CRYOMNI3D_VIDEO_HNM_DECODER_H
#define CRYOMNI3D_VIDEO_HNM_DECODER_H
#include "common/rational.h"
#include "graphics/pixelformat.h"
#include "video/video_decoder.h"
#include "graphics/surface.h"
#include "audio/audiostream.h"
namespace Common {
class SeekableReadStream;
}
namespace Video {
/**
* Decoder for HNM videos.
*
* Video decoder used in engines:
* - cryomni3d
*/
class HNMDecoder : public VideoDecoder {
public:
HNMDecoder(bool loop = false, byte *initialPalette = nullptr);
virtual ~HNMDecoder();
bool loadStream(Common::SeekableReadStream *stream);
void readNextPacket();
void close();
void setRegularFrameDelay(uint32 regularFrameDelay) { _regularFrameDelay = regularFrameDelay; }
private:
class HNM4VideoTrack : public VideoTrack {
public:
HNM4VideoTrack(uint32 width, uint32 height, uint32 frameSize, uint32 frameCount,
uint32 regularFrameDelay, const byte *initialPalette = nullptr);
~HNM4VideoTrack();
// When _frameCount is 0, it means we are looping
bool endOfTrack() const { return (_frameCount == 0) ? false : VideoTrack::endOfTrack(); }
uint16 getWidth() const { return _surface.w; }
uint16 getHeight() const { return _surface.h; }
Graphics::PixelFormat getPixelFormat() const { return _surface.format; }
int getCurFrame() const { return _curFrame; }
int getFrameCount() const { return _frameCount; }
uint32 getNextFrameStartTime() const { return _nextFrameStartTime; }
const Graphics::Surface *decodeNextFrame() { return &_surface; }
const byte *getPalette() const { _dirtyPalette = false; return _palette; }
bool hasDirtyPalette() const { return _dirtyPalette; }
/** Decode a video chunk. */
void decodePalette(Common::SeekableReadStream *stream, uint32 size);
void decodeInterframe(Common::SeekableReadStream *stream, uint32 size);
void decodeIntraframe(Common::SeekableReadStream *stream, uint32 size);
void restart() { _nextFrameDelay = uint32(-1); _nextNextFrameDelay = uint32(-1); }
void setFrameDelay(uint32 frameDelay);
private:
Graphics::Surface _surface;
uint32 _regularFrameDelay;
uint32 _nextFrameDelay;
uint32 _nextNextFrameDelay;
uint32 _nextFrameStartTime;
uint32 _frameCount;
int _curFrame;
byte _palette[256 * 3];
mutable bool _dirtyPalette;
byte *_frameBufferC;
byte *_frameBufferP;
};
class DPCMAudioTrack : public AudioTrack {
public:
DPCMAudioTrack(uint16 channels, uint16 bits, uint sampleRate,
Audio::Mixer::SoundType soundType);
~DPCMAudioTrack();
Audio::Timestamp decodeSound(Common::SeekableReadStream *stream, uint32 size);
protected:
Audio::AudioStream *getAudioStream() const { return _audioStream; }
private:
Audio::QueuingAudioStream *_audioStream;
bool _gotLUT;
uint16 _lut[256];
uint16 _lastSample;
};
bool _loop;
byte *_initialPalette;
uint32 _regularFrameDelay;
// These two pointer are owned by VideoDecoder
HNM4VideoTrack *_videoTrack;
DPCMAudioTrack *_audioTrack;
Common::SeekableReadStream *_stream;
};
} // End of namespace Video
#endif
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