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animation.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002-2004 The ScummVM project
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/graphics/animation.h,v 1.10.2.1 2005/03/13 17:16:06 eriktorbjorn Exp $
 *
 */

#ifndef GRAPHICS_ANIMATION_H
#define GRAPHICS_ANIMATION_H

#include "common/scummsys.h"
#include "sound/mixer.h"

class AudioStream;

// Uncomment this if you are using libmpeg2 0.3.1.
// #define USE_MPEG2_0_3_1

#ifdef USE_MPEG2
typedef int8 int8_t;
typedef int16 int16_t;
typedef int32 int32_t;

typedef uint8 uint8_t;
typedef uint16 uint16_t;
typedef uint32 uint32_t; 

extern "C" {
      #include <mpeg2dec/mpeg2.h>
}

#ifdef USE_MPEG2_0_3_1
typedef int mpeg2_state_t;
typedef sequence_t mpeg2_sequence_t;
#define STATE_BUFFER -1
#endif

#endif

#ifdef BACKEND_8BIT
#define SQR(x) ((x) * (x))
#define SHIFT 3
#else
#define SHIFT 1
#endif

#define BITDEPTH (1 << (8 - SHIFT))
#define ROUNDADD (1 << (SHIFT - 1))

#define BUFFER_SIZE 4096


namespace Graphics {

class BaseAnimationState {
protected:
      const int MOVIE_WIDTH;
      const int MOVIE_HEIGHT;
      
      SoundMixer *_snd;
      OSystem *_sys;

      uint framenum;
      uint frameskipped;
      uint32 ticks;

#ifdef USE_MPEG2
      mpeg2dec_t *decoder;
      const mpeg2_info_t *info;
#endif

      File *mpgfile;

      byte buffer[BUFFER_SIZE];

      PlayingSoundHandle bgSound;
      AudioStream *bgSoundStream;

#ifdef BACKEND_8BIT
      int palnum;
      int maxPalnum;

      byte lookup[2][(BITDEPTH+1) * (BITDEPTH+1) * (BITDEPTH+1)];
      byte *lut;
      byte *lut2;
      int lutcalcnum;

      int curpal;
      int cr;
      int pos;

      struct {
            uint cnt;
            uint end;
            byte pal[4 * 256];
      } palettes[50];
#else
      OverlayColor *overlay;
      int bitFormat;
      int16 *colortab;
      uint16 *rgb_2_pix;
#endif

public:
      BaseAnimationState(SoundMixer *snd, OSystem *sys, int width, int height);
      virtual ~BaseAnimationState();

      bool init(const char *name, void *audioArg = NULL);
      bool decodeFrame();

#ifndef BACKEND_8BIT
      void buildLookup();
#endif

protected:
      bool checkPaletteSwitch();
      virtual void drawYUV(int width, int height, byte *const *dat) = 0;
      virtual AudioStream *createAudioStream(const char *name, void *arg);

#ifdef BACKEND_8BIT
      void buildLookup(int p, int lines);
      virtual void setPalette(byte *pal) = 0;
#else
      void plotYUV(int width, int height, byte *const *dat);
#endif
};


} // End of namespace Graphics

#endif

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