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animation.cpp

/* 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.cpp,v 1.15.2.2 2005/03/13 17:16:05 eriktorbjorn Exp $
 *
 */

#include "common/stdafx.h"
#include "graphics/animation.h"
#include "common/file.h"
#include "sound/audiostream.h"
#include "common/config-manager.h"
#include "common/scaler/intern.h"

namespace Graphics {

BaseAnimationState::BaseAnimationState(SoundMixer *snd, OSystem *sys, int width, int height) 
      : MOVIE_WIDTH(width), MOVIE_HEIGHT(height), _snd(snd), _sys(sys) {
#ifndef BACKEND_8BIT
      colortab = NULL;
      rgb_2_pix = NULL;
      bitFormat = 0;
#endif
}

BaseAnimationState::~BaseAnimationState() {
#ifdef USE_MPEG2
      _snd->stopHandle(bgSound);
      if (decoder)
            mpeg2_close(decoder);
      delete mpgfile;
#ifndef BACKEND_8BIT
      _sys->hideOverlay();
      free(overlay);
      free(colortab);
      free(rgb_2_pix);
#endif
      delete bgSoundStream;
#endif
}


bool BaseAnimationState::init(const char *name, void *audioArg) {
#ifdef USE_MPEG2
      char tempFile[512];

      decoder = NULL;
      mpgfile = NULL;
      bgSoundStream = NULL;

#ifdef BACKEND_8BIT

      uint i, p;

      // Load lookup palettes
      sprintf(tempFile, "%s.pal", name);

      File f;

      if (!f.open(tempFile)) {
            warning("Cutscene: %s palette missing", tempFile);
            return false;
      }

      p = 0;
      while (1) {
            palettes[p].end = f.readUint16LE();
            palettes[p].cnt = f.readUint16LE();

            if (f.ioFailed())
                  break;

            for (i = 0; i < palettes[p].cnt; i++) {
                  palettes[p].pal[4 * i] = f.readByte();
                  palettes[p].pal[4 * i + 1] = f.readByte();
                  palettes[p].pal[4 * i + 2] = f.readByte();
                  palettes[p].pal[4 * i + 3] = 0;
            }
            for (; i < 256; i++) {
                  palettes[p].pal[4 * i] = 0;
                  palettes[p].pal[4 * i + 1] = 0;
                  palettes[p].pal[4 * i + 2] = 0;
                  palettes[p].pal[4 * i + 3] = 0;
            }

            p++;
      }

      f.close();

      palnum = 0;
      maxPalnum = p;
      setPalette(palettes[palnum].pal);
      lut = lut2 = lookup[0];
      curpal = -1;
      cr = 0;
      buildLookup(palnum, 256);
      lut2 = lookup[1];
      lutcalcnum = (BITDEPTH + palettes[palnum].end + 2) / (palettes[palnum].end + 2);
#else
      buildLookup();
      overlay = (OverlayColor*)calloc(MOVIE_WIDTH * MOVIE_HEIGHT, sizeof(OverlayColor));
      _sys->showOverlay();
#endif

      // Open MPEG2 stream
      mpgfile = new File();
      sprintf(tempFile, "%s.mp2", name);
      if (!mpgfile->open(tempFile)) {
            warning("Cutscene: Could not open %s", tempFile);
            return false;
      }

      // Load and configure decoder
      decoder = mpeg2_init();
      if (decoder == NULL) {
            warning("Cutscene: Could not allocate an MPEG2 decoder");
            return false;
      }

      info = mpeg2_info(decoder);
      framenum = 0;
      frameskipped = 0;
      ticks = _sys->getMillis();

      // Play audio
      bgSoundStream = createAudioStream(name, audioArg);

      if (bgSoundStream != NULL) {
            _snd->playInputStream(&bgSound, bgSoundStream, false, -1, 255, 0, false);
      } else {
            warning("Cutscene: Could not open Audio Track for %s", name);
      }

      return true;
#else /* USE_MPEG2 */
      return false;
#endif
}

AudioStream *BaseAnimationState::createAudioStream(const char *name, void *arg) {
      return AudioStream::openStreamFile(name);
}

bool BaseAnimationState::decodeFrame() {
#ifdef USE_MPEG2
      mpeg2_state_t state;
      const mpeg2_sequence_t *sequence_i;
      size_t size = (size_t) -1;

      do {
            state = mpeg2_parse(decoder);
            sequence_i = info->sequence;

            switch (state) {
            case STATE_BUFFER:
                  size = mpgfile->read(buffer, BUFFER_SIZE);
                  mpeg2_buffer(decoder, buffer, buffer + size);
                  break;

            case STATE_SLICE:
            case STATE_END:
                  if (info->display_fbuf) {
                        /* simple audio video sync code:
                         * we calculate the actual frame by taking the elapsed audio time and try
                         * to stay inside +- 1 frame of this calculated frame number by dropping
                         * frames if we run behind and delaying if we are too fast
                         */

                        /* Avoid deadlock is sound was too far ahead */
                        if (bgSoundStream && !bgSound.isActive())
                              return false;

                        if (checkPaletteSwitch() || (bgSoundStream == NULL) ||
                              ((_snd->getSoundElapsedTime(bgSound) * 12) / 1000 < framenum + 1) ||
                              frameskipped > 10) {
                              if (frameskipped > 10) {
                                    warning("force frame %i redraw", framenum);
                                    frameskipped = 0;
                              }
                              drawYUV(sequence_i->width, sequence_i->height, info->display_fbuf->buf);

                              if (bgSoundStream) {
                                    while ((_snd->getSoundElapsedTime(bgSound) * 12) / 1000 < framenum)
                                          _sys->delayMillis(10);
                              } else {
                                    ticks += 83;
                                    while (_sys->getMillis() < ticks)
                                          _sys->delayMillis(10);
                                    // FIXME: This used to be used for the Sword2 version of this
                                    // method. I do not see any compelling reason why it should be
                                    // used, but maybe I am wrong; so if you know more, either
                                    // remove this comment, or change the implementation of the 
                                    // method to use "sleepUntil" for BS2.
                                    //_vm->sleepUntil(ticks);
                              }

                        } else {
                              warning("dropped frame %i", framenum);
                              frameskipped++;
                        }

#ifdef BACKEND_8BIT
                        buildLookup(palnum + 1, lutcalcnum);
#endif

                        framenum++;
                        return true;

                  }
                  break;

            default:
                  break;
            }
      } while (size);
#endif
      return false;
}

bool BaseAnimationState::checkPaletteSwitch() {
#ifdef BACKEND_8BIT
      // if we have reached the last image with this palette, switch to new one
      if (framenum == palettes[palnum].end) {
            unsigned char *l = lut2;
            palnum++;
            setPalette(palettes[palnum].pal);
            lutcalcnum = (BITDEPTH + palettes[palnum].end - (framenum + 1) + 2) / (palettes[palnum].end - (framenum + 1) + 2);
            lut2 = lut;
            lut = l;
            return true;
      }
#endif

      return false;
}

#ifdef BACKEND_8BIT

/**
 * Build 'Best-Match' RGB lookup table
 */
void BaseAnimationState::buildLookup(int p, int lines) {
      int y, cb;
      int r, g, b, ii;

      if (p >= maxPalnum)
            return;
  
      if (p != curpal) {
            curpal = p;
            cr = 0;
            pos = 0;
      }

      if (cr > BITDEPTH)
            return;

      for (ii = 0; ii < lines; ii++) {
            r = (-16 * 256 + (int) (256 * 1.596) * ((cr << SHIFT) - 128)) / 256;
            for (cb = 0; cb <= BITDEPTH; cb++) {
                  g = (-16 * 256 - (int) (0.813 * 256) * ((cr << SHIFT) - 128) - (int) (0.391 * 256) * ((cb << SHIFT) - 128)) / 256;
                  b = (-16 * 256 + (int) (2.018 * 256) * ((cb << SHIFT) - 128)) / 256;

                  for (y = 0; y <= BITDEPTH; y++) {
                        int idx, bst = 0;
                        int dis = 2 * SQR(r - palettes[p].pal[0]) + 4 * SQR(g - palettes[p].pal[1]) + SQR(b - palettes[p].pal[2]);

                        for (idx = 1; idx < 256; idx++) {
                              long d2 = 2 * SQR(r - palettes[p].pal[4 * idx]) + 4 * SQR(g - palettes[p].pal[4 * idx + 1]) + SQR(b - palettes[p].pal[4 * idx + 2]);
                              if (d2 < dis) {
                                    bst = idx;
                                    dis = d2;
                              }
                        }
                        lut2[pos++] = bst;
      
                        r += (1 << SHIFT);
                        g += (1 << SHIFT);
                        b += (1 << SHIFT);
                  }
                  r -= (BITDEPTH+1)*(1 << SHIFT);
            }
            cr++;
            if (cr > BITDEPTH)
                  return;
      }
}

#else

// The YUV to RGB conversion code is derived from SDL's YUV overlay code, which
// in turn appears to be derived from mpeg_play. The following copyright
// notices have been included in accordance with the original license. Please
// note that the term "software" in this context only applies to the two
// functions buildLookup() and plotYUV() below.

// Copyright (c) 1995 The Regents of the University of California.
// All rights reserved.
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without written agreement is
// hereby granted, provided that the above copyright notice and the following
// two paragraphs appear in all copies of this software.
//
// IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
// DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
// OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
// CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
// ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
// PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

// Copyright (c) 1995 Erik Corry
// All rights reserved.
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without written agreement is
// hereby granted, provided that the above copyright notice and the following
// two paragraphs appear in all copies of this software.
//
// IN NO EVENT SHALL ERIK CORRY BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
// THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF ERIK CORRY HAS BEEN ADVISED
// OF THE POSSIBILITY OF SUCH DAMAGE.
//
// ERIK CORRY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
// BASIS, AND ERIK CORRY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

// Portions of this software Copyright (c) 1995 Brown University.
// All rights reserved.
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without written agreement
// is hereby granted, provided that the above copyright notice and the
// following two paragraphs appear in all copies of this software.
//
// IN NO EVENT SHALL BROWN UNIVERSITY BE LIABLE TO ANY PARTY FOR
// DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
// OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF BROWN
// UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// BROWN UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
// BASIS, AND BROWN UNIVERSITY HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
// SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

void BaseAnimationState::buildLookup() {
      // Do we already have lookup tables for this bit format?
      if (gBitFormat == bitFormat && colortab && rgb_2_pix)
            return;

      free(colortab);
      free(rgb_2_pix);

      colortab = (int16 *)malloc(4 * 256 * sizeof(int16));

      int16 *Cr_r_tab = &colortab[0 * 256];
      int16 *Cr_g_tab = &colortab[1 * 256];
      int16 *Cb_g_tab = &colortab[2 * 256];
      int16 *Cb_b_tab = &colortab[3 * 256];

      rgb_2_pix = (uint16 *)malloc(3 * 768 * sizeof(uint16));

      uint16 *r_2_pix_alloc = &rgb_2_pix[0 * 768];
      uint16 *g_2_pix_alloc = &rgb_2_pix[1 * 768];
      uint16 *b_2_pix_alloc = &rgb_2_pix[2 * 768];

      int16 CR, CB;
      int i;

      // Generate the tables for the display surface

      for (i = 0; i < 256; i++) {
            // Gamma correction (luminescence table) and chroma correction
            // would be done here. See the Berkeley mpeg_play sources.

            CR = CB = (i - 128);
            Cr_r_tab[i] = (int16) ( (0.419 / 0.299) * CR);
            Cr_g_tab[i] = (int16) (-(0.299 / 0.419) * CR);
            Cb_g_tab[i] = (int16) (-(0.114 / 0.331) * CB);
            Cb_b_tab[i] = (int16) ( (0.587 / 0.331) * CB);
      }

      // Set up entries 0-255 in rgb-to-pixel value tables.

      if (gBitFormat == 565) {
            for (i = 0; i < 256; i++) {
                  r_2_pix_alloc[i + 256] = i >> (8 - 5);
                  r_2_pix_alloc[i + 256] <<= 11;
                  g_2_pix_alloc[i + 256] = i >> (8 - 6);
                  g_2_pix_alloc[i + 256] <<= 5;
                  b_2_pix_alloc[i + 256] = i >> (8 - 5);
                  // b_2_pix_alloc[i + 256] <<= 0;
            }
      } else if (gBitFormat == 555) {
            for (i = 0; i < 256; i++) {
                  r_2_pix_alloc[i + 256] = i >> (8 - 5);
                  r_2_pix_alloc[i + 256] <<= 10;
                  g_2_pix_alloc[i + 256] = i >> (8 - 5);
                  g_2_pix_alloc[i + 256] <<= 5;
                  b_2_pix_alloc[i + 256] = i >> (8 - 5);
                  // b_2_pix_alloc[i + 256] <<= 0;
            }
      } else {
            error("Unknown bit format %d", gBitFormat);
      }

      // Spread out the values we have to the rest of the array so that we do
      // not need to check for overflow.

      for (i = 0; i < 256; i++) {
            r_2_pix_alloc[i] = r_2_pix_alloc[256];
            r_2_pix_alloc[i + 512] = r_2_pix_alloc[511];
            g_2_pix_alloc[i] = g_2_pix_alloc[256];
            g_2_pix_alloc[i + 512] = g_2_pix_alloc[511];
            b_2_pix_alloc[i] = b_2_pix_alloc[256];
            b_2_pix_alloc[i + 512] = b_2_pix_alloc[511];
      }

      bitFormat = gBitFormat;
}

void BaseAnimationState::plotYUV(int width, int height, byte *const *dat) {
      OverlayColor *ptr = overlay + (MOVIE_HEIGHT - height) / 2 * MOVIE_WIDTH + (MOVIE_WIDTH - width) / 2;

      byte *lum = dat[0];
      byte *cr = dat[2];
      byte *cb = dat[1];

      byte *lum2 = lum + width;

      int16 cr_r;
      int16 crb_g;
      int16 cb_b;

      OverlayColor *row1 = ptr;
      OverlayColor *row2 = ptr + MOVIE_WIDTH;

      int x, y;

      for (y = 0; y < height; y += 2) {
            for (x = 0; x < width; x += 2) {
                  register byte L;

                  cr_r  = 0 * 768 + 256 + colortab[*cr + 0 * 256];
                  crb_g = 1 * 768 + 256 + colortab[*cr + 1 * 256] + colortab[*cb + 2 * 256];
                  cb_b  = 2 * 768 + 256 + colortab[*cb + 3 * 256];
                  ++cr;
                  ++cb;

                  L = *lum++;
                  *row1++ = (rgb_2_pix[L + cr_r] | rgb_2_pix[L + crb_g] | rgb_2_pix[L + cb_b]);
                  L = *lum++;
                  *row1++ = (rgb_2_pix[L + cr_r] | rgb_2_pix[L + crb_g] | rgb_2_pix[L + cb_b]);

                  // Now, do second row.

                  L = *lum2++;
                  *row2++ = (rgb_2_pix[L + cr_r] | rgb_2_pix[L + crb_g] | rgb_2_pix[L + cb_b]);
                  L = *lum2++;
                  *row2++ = (rgb_2_pix[L + cr_r] | rgb_2_pix[L + crb_g] | rgb_2_pix[L + cb_b]);
            }

            // These values are at the start of the next line, (due
            // to the ++'s above), but they need to be at the start
            // of the line after that.

            lum  += width;
            lum2 += width;
            row1 += (2 * MOVIE_WIDTH - width);
            row2 += (2 * MOVIE_WIDTH - width);
      }
}

#endif

} // End of namespace Graphics

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