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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 VIDEO_PSX_DECODER_H
#define VIDEO_PSX_DECODER_H
#include "common/bitstream.h"
#include "common/endian.h"
#include "common/rational.h"
#include "common/rect.h"
#include "common/str.h"
#include "graphics/surface.h"
#include "video/video_decoder.h"
namespace Audio {
class QueuingAudioStream;
}
namespace Common {
template <class BITSTREAM>
class Huffman;
}
namespace Graphics {
struct PixelFormat;
}
namespace Video {
/**
* Decoder for PSX stream videos.
* This currently implements the most basic PSX stream format that is
* used by most games on the system. Special variants are not supported
* at this time.
*
* Video decoder used in engines:
* - sword1 (psx)
* - sword2 (psx)
*/
class PSXStreamDecoder : public VideoDecoder {
public:
// CD speed in sectors/second
// Calling code should use these enum values instead of the constants
enum CDSpeed {
kCD1x = 75,
kCD2x = 150
};
PSXStreamDecoder(CDSpeed speed, uint32 frameCount = 0);
virtual ~PSXStreamDecoder();
bool loadStream(Common::SeekableReadStream *stream);
void close();
protected:
void readNextPacket();
bool useAudioSync() const;
private:
class PSXVideoTrack : public VideoTrack {
public:
PSXVideoTrack(Common::SeekableReadStream *firstSector, CDSpeed speed, int frameCount);
~PSXVideoTrack();
uint16 getWidth() const { return _surface->w; }
uint16 getHeight() const { return _surface->h; }
Graphics::PixelFormat getPixelFormat() const { return _surface->format; }
bool endOfTrack() const { return _endOfTrack; }
int getCurFrame() const { return _curFrame; }
int getFrameCount() const { return _frameCount; }
uint32 getNextFrameStartTime() const;
const Graphics::Surface *decodeNextFrame();
void setEndOfTrack() { _endOfTrack = true; }
void decodeFrame(Common::BitStreamMemoryStream *frame, uint sectorCount);
private:
Graphics::Surface *_surface;
uint32 _frameCount;
Audio::Timestamp _nextFrameStartTime;
bool _endOfTrack;
int _curFrame;
enum PlaneType {
kPlaneY = 0,
kPlaneU = 1,
kPlaneV = 2
};
typedef Common::Huffman<Common::BitStreamMemory16LEMSB> HuffmanDecoder;
uint16 _macroBlocksW, _macroBlocksH;
byte *_yBuffer, *_cbBuffer, *_crBuffer;
void decodeMacroBlock(Common::BitStreamMemory16LEMSB *bits, int mbX, int mbY, uint16 scale, uint16 version);
void decodeBlock(Common::BitStreamMemory16LEMSB *bits, byte *block, int pitch, uint16 scale, uint16 version, PlaneType plane);
void readAC(Common::BitStreamMemory16LEMSB *bits, int *block);
HuffmanDecoder *_acHuffman;
int readDC(Common::BitStreamMemory16LEMSB *bits, uint16 version, PlaneType plane);
HuffmanDecoder *_dcHuffmanLuma, *_dcHuffmanChroma;
int _lastDC[3];
void dequantizeBlock(int *coefficients, float *block, uint16 scale);
void idct(float *dequantData, float *result);
int readSignedCoefficient(Common::BitStreamMemory16LEMSB *bits);
};
class PSXAudioTrack : public AudioTrack {
public:
PSXAudioTrack(Common::SeekableReadStream *sector, Audio::Mixer::SoundType soundType);
~PSXAudioTrack();
bool endOfTrack() const;
void setEndOfTrack() { _endOfTrack = true; }
void queueAudioFromSector(Common::SeekableReadStream *sector);
private:
Audio::AudioStream *getAudioStream() const;
Audio::QueuingAudioStream *_audStream;
struct ADPCMStatus {
int16 sample[2];
} _adpcmStatus[2];
bool _endOfTrack;
};
CDSpeed _speed;
uint32 _frameCount;
Common::SeekableReadStream *_stream;
PSXVideoTrack *_videoTrack;
PSXAudioTrack *_audioTrack;
Common::SeekableReadStream *readSector();
};
} // End of namespace Video
#endif
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