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