dlls/iccvid/iccvid.c

   1 /*
   2  * Radius Cinepak Video Decoder
   3  *
   4  * Copyright 2001 Dr. Tim Ferguson (see below)
   5  * Portions Copyright 2003 Mike McCormack for CodeWeavers
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 /* Copyright notice from original source:
  23  * ------------------------------------------------------------------------
  24  * Radius Cinepak Video Decoder
  25  *
  26  * Dr. Tim Ferguson, 2001.
  27  * For more details on the algorithm:
  28  *         http://www.csse.monash.edu.au/~timf/videocodec.html
  29  *
  30  * This is basically a vector quantiser with adaptive vector density.  The
  31  * frame is segmented into 4x4 pixel blocks, and each block is coded using
  32  * either 1 or 4 vectors.
  33  *
  34  * There are still some issues with this code yet to be resolved.  In
  35  * particular with decoding in the strip boundaries.  However, I have not
  36  * yet found a sequence it doesn't work on.  Ill keep trying :)
  37  *
  38  * You may freely use this source code.  I only ask that you reference its
  39  * source in your projects documentation:
  40  *       Tim Ferguson: http://www.csse.monash.edu.au/~timf/
  41  * ------------------------------------------------------------------------ */
  42
  43 #include <stdarg.h>
  44 #include "windef.h"
  45 #include "winbase.h"
  46 #include "wingdi.h"
  47 #include "winuser.h"
  48 #include "commdlg.h"
  49 #include "vfw.h"
  50 #include "mmsystem.h"
  51 #include "iccvid_private.h"
  52
  53 #include "wine/debug.h"
  54
  55 WINE_DEFAULT_DEBUG_CHANNEL(iccvid);
  56
  57 static HINSTANCE ICCVID_hModule;
  58
  59 #define ICCVID_MAGIC mmioFOURCC('c', 'v', 'i', 'd')
  60
  61 #define DBUG    0
  62 #define MAX_STRIPS 32
  63
  64 /* ------------------------------------------------------------------------ */
  65 typedef struct
  66 {
  67     unsigned char y0, y1, y2, y3;
  68     char u, v;
  69     unsigned char r[4], g[4], b[4];
  70 } cvid_codebook;
  71
  72 typedef struct {
  73     cvid_codebook *v4_codebook[MAX_STRIPS];
  74     cvid_codebook *v1_codebook[MAX_STRIPS];
  75     unsigned int strip_num;
  76 } cinepak_info;
  77
  78 typedef struct _ICCVID_Info
  79 {
  80     DWORD         dwMagic;
  81     int           bits_per_pixel;
  82     cinepak_info *cvinfo;
  83 } ICCVID_Info;
  84
  85 static inline LPVOID ICCVID_Alloc( size_t size, size_t count )
  86 {
  87     return HeapAlloc( GetProcessHeap(), 0, size*count );
  88 }
  89
  90 static inline BOOL ICCVID_Free( LPVOID ptr )
  91 {
  92     return HeapFree( GetProcessHeap(), 0, ptr );
  93 }
  94
  95
  96 /* ------------------------------------------------------------------------ */
  97 static unsigned char *in_buffer, uiclip[1024], *uiclp = NULL;
  98
  99 #define get_byte() *(in_buffer++)
 100 #define skip_byte() in_buffer++
 101 #define get_word() ((unsigned short)(in_buffer += 2, \
 102     (in_buffer[-2] << 8 | in_buffer[-1])))
 103 #define get_long() ((unsigned long)(in_buffer += 4, \
 104     (in_buffer[-4] << 24 | in_buffer[-3] << 16 | in_buffer[-2] << 8 | in_buffer[-1])))
 105
 106
 107 /* ---------------------------------------------------------------------- */
 108 static inline void read_codebook(cvid_codebook *c, int mode)
 109 {
 110 int uvr, uvg, uvb;
 111
 112     if(mode)        /* black and white */
 113         {
 114         c->y0 = get_byte();
 115         c->y1 = get_byte();
 116         c->y2 = get_byte();
 117         c->y3 = get_byte();
 118         c->u = c->v = 0;
 119
 120         c->r[0] = c->g[0] = c->b[0] = c->y0;
 121         c->r[1] = c->g[1] = c->b[1] = c->y1;
 122         c->r[2] = c->g[2] = c->b[2] = c->y2;
 123         c->r[3] = c->g[3] = c->b[3] = c->y3;
 124         }
 125     else            /* colour */
 126         {
 127         c->y0 = get_byte();  /* luma */
 128         c->y1 = get_byte();
 129         c->y2 = get_byte();
 130         c->y3 = get_byte();
 131         c->u = get_byte(); /* chroma */
 132         c->v = get_byte();
 133
 134         uvr = c->v << 1;
 135         uvg = -((c->u+1) >> 1) - c->v;
 136         uvb = c->u << 1;
 137
 138         c->r[0] = uiclp[c->y0 + uvr]; c->g[0] = uiclp[c->y0 + uvg]; c->b[0] = uiclp[c->y0 + uvb];
 139         c->r[1] = uiclp[c->y1 + uvr]; c->g[1] = uiclp[c->y1 + uvg]; c->b[1] = uiclp[c->y1 + uvb];
 140         c->r[2] = uiclp[c->y2 + uvr]; c->g[2] = uiclp[c->y2 + uvg]; c->b[2] = uiclp[c->y2 + uvb];
 141         c->r[3] = uiclp[c->y3 + uvr]; c->g[3] = uiclp[c->y3 + uvg]; c->b[3] = uiclp[c->y3 + uvb];
 142         }
 143 }
 144
 145
 146 #define MAKECOLOUR32(r,g,b) (((r) << 16) | ((g) << 8) | (b))
 147 /*#define MAKECOLOUR24(r,g,b) (((r) << 16) | ((g) << 8) | (b))*/
 148 #define MAKECOLOUR16(r,g,b) (((r) >> 3) << 11)| (((g) >> 2) << 5)| (((b) >> 3) << 0)
 149 #define MAKECOLOUR15(r,g,b) (((r) >> 3) << 10)| (((g) >> 3) << 5)| (((b) >> 3) << 0)
 150
 151 /* ------------------------------------------------------------------------ */
 152 static void cvid_v1_32(unsigned char *frm, unsigned char *limit, int stride, cvid_codebook *cb)
 153 {
 154 unsigned long *vptr = (unsigned long *)frm;
 155 #ifndef ORIGINAL
 156 int row_inc = -stride/4;
 157 #else
 158 int row_inc = stride/4;
 159 #endif
 160 int x, y;
 161
 162     /* fill 4x4 block of pixels with colour values from codebook */
 163     for (y = 0; y < 4; y++)
 164     {
 165         if (&vptr[y*row_inc] < (unsigned long *)limit) return;
 166         for (x = 0; x < 4; x++)
 167             vptr[y*row_inc + x] = MAKECOLOUR32(cb->r[x/2+(y/2)*2], cb->g[x/2+(y/2)*2], cb->b[x/2+(y/2)*2]);
 168     }
 169 }
 170
 171
 172 /* ------------------------------------------------------------------------ */
 173 static void cvid_v4_32(unsigned char *frm, unsigned char *limit, int stride, cvid_codebook *cb0,
 174     cvid_codebook *cb1, cvid_codebook *cb2, cvid_codebook *cb3)
 175 {
 176 unsigned long *vptr = (unsigned long *)frm;
 177 #ifndef ORIGINAL
 178 int row_inc = -stride/4;
 179 #else
 180 int row_inc = stride/4;
 181 #endif
 182 int x, y;
 183 cvid_codebook * cb[] = {cb0,cb1,cb2,cb3};
 184
 185     /* fill 4x4 block of pixels with colour values from codebooks */
 186     for (y = 0; y < 4; y++)
 187     {
 188         if (&vptr[y*row_inc] < (unsigned long *)limit) return;
 189         for (x = 0; x < 4; x++)
 190             vptr[y*row_inc + x] = MAKECOLOUR32(cb[x/2+(y/2)*2]->r[x%2+(y%2)*2], cb[x/2+(y/2)*2]->g[x%2+(y%2)*2], cb[x/2+(y/2)*2]->b[x%2+(y%2)*2]);
 191     }
 192 }
 193
 194
 195 /* ------------------------------------------------------------------------ */
 196 static void cvid_v1_24(unsigned char *vptr, unsigned char *limit, int stride, cvid_codebook *cb)
 197 {
 198 #ifndef ORIGINAL
 199 int row_inc = -stride;
 200 #else
 201 int row_inc = stride;
 202 #endif
 203 int x, y;
 204
 205     /* fill 4x4 block of pixels with colour values from codebook */
 206     for (y = 0; y < 4; y++)
 207     {
 208         if (&vptr[y*row_inc] < limit) return;
 209         for (x = 0; x < 4; x++)
 210         {
 211             vptr[y*row_inc + x*3 + 0] = cb->b[x/2+(y/2)*2];
 212             vptr[y*row_inc + x*3 + 1] = cb->g[x/2+(y/2)*2];
 213             vptr[y*row_inc + x*3 + 2] = cb->r[x/2+(y/2)*2];
 214         }
 215     }
 216 }
 217
 218
 219 /* ------------------------------------------------------------------------ */
 220 static void cvid_v4_24(unsigned char *vptr, unsigned char *limit, int stride, cvid_codebook *cb0,
 221     cvid_codebook *cb1, cvid_codebook *cb2, cvid_codebook *cb3)
 222 {
 223 #ifndef ORIGINAL
 224 int row_inc = -stride;
 225 #else
 226 int row_inc = stride;
 227 #endif
 228 cvid_codebook * cb[] = {cb0,cb1,cb2,cb3};
 229 int x, y;
 230
 231     /* fill 4x4 block of pixels with colour values from codebooks */
 232     for (y = 0; y < 4; y++)
 233     {
 234         if (&vptr[y*row_inc] < limit) return;
 235         for (x = 0; x < 4; x++)
 236         {
 237             vptr[y*row_inc + x*3 + 0] = cb[x/2+(y/2)*2]->b[x%2+(y%2)*2];
 238             vptr[y*row_inc + x*3 + 1] = cb[x/2+(y/2)*2]->g[x%2+(y%2)*2];
 239             vptr[y*row_inc + x*3 + 2] = cb[x/2+(y/2)*2]->r[x%2+(y%2)*2];
 240         }
 241     }
 242 }
 243
 244
 245 /* ------------------------------------------------------------------------ */
 246 static void cvid_v1_16(unsigned char *frm, unsigned char *limit, int stride, cvid_codebook *cb)
 247 {
 248 unsigned short *vptr = (unsigned short *)frm;
 249 #ifndef ORIGINAL
 250 int row_inc = -stride/2;
 251 #else
 252 int row_inc = stride/2;
 253 #endif
 254 int x, y;
 255
 256     /* fill 4x4 block of pixels with colour values from codebook */
 257     for (y = 0; y < 4; y++)
 258     {
 259         if (&vptr[y*row_inc] < (unsigned short *)limit) return;
 260         for (x = 0; x < 4; x++)
 261             vptr[y*row_inc + x] = MAKECOLOUR16(cb->r[x/2+(y/2)*2], cb->g[x/2+(y/2)*2], cb->b[x/2+(y/2)*2]);
 262     }
 263 }
 264
 265
 266 /* ------------------------------------------------------------------------ */
 267 static void cvid_v4_16(unsigned char *frm, unsigned char *limit, int stride, cvid_codebook *cb0,
 268     cvid_codebook *cb1, cvid_codebook *cb2, cvid_codebook *cb3)
 269 {
 270 unsigned short *vptr = (unsigned short *)frm;
 271 #ifndef ORIGINAL
 272 int row_inc = -stride/2;
 273 #else
 274 int row_inc = stride/2;
 275 #endif
 276 cvid_codebook * cb[] = {cb0,cb1,cb2,cb3};
 277 int x, y;
 278
 279     /* fill 4x4 block of pixels with colour values from codebooks */
 280     for (y = 0; y < 4; y++)
 281     {
 282         if (&vptr[y*row_inc] < (unsigned short *)limit) return;
 283         for (x = 0; x < 4; x++)
 284             vptr[y*row_inc + x] = MAKECOLOUR16(cb[x/2+(y/2)*2]->r[x%2+(y%2)*2], cb[x/2+(y/2)*2]->g[x%2+(y%2)*2], cb[x/2+(y/2)*2]->b[x%2+(y%2)*2]);
 285     }
 286 }
 287
 288 /* ------------------------------------------------------------------------ */
 289 static void cvid_v1_15(unsigned char *frm, unsigned char *limit, int stride, cvid_codebook *cb)
 290 {
 291 unsigned short *vptr = (unsigned short *)frm;
 292 #ifndef ORIGINAL
 293 int row_inc = -stride/2;
 294 #else
 295 int row_inc = stride/2;
 296 #endif
 297 int x, y;
 298
 299     /* fill 4x4 block of pixels with colour values from codebook */
 300     for (y = 0; y < 4; y++)
 301     {
 302         if (&vptr[y*row_inc] < (unsigned short *)limit) return;
 303         for (x = 0; x < 4; x++)
 304             vptr[y*row_inc + x] = MAKECOLOUR15(cb->r[x/2+(y/2)*2], cb->g[x/2+(y/2)*2], cb->b[x/2+(y/2)*2]);
 305     }
 306 }
 307
 308
 309 /* ------------------------------------------------------------------------ */
 310 static void cvid_v4_15(unsigned char *frm, unsigned char *limit, int stride, cvid_codebook *cb0,
 311     cvid_codebook *cb1, cvid_codebook *cb2, cvid_codebook *cb3)
 312 {
 313 unsigned short *vptr = (unsigned short *)frm;
 314 #ifndef ORIGINAL
 315 int row_inc = -stride/2;
 316 #else
 317 int row_inc = stride/2;
 318 #endif
 319 cvid_codebook * cb[] = {cb0,cb1,cb2,cb3};
 320 int x, y;
 321
 322     /* fill 4x4 block of pixels with colour values from codebooks */
 323     for (y = 0; y < 4; y++)
 324     {
 325         if (&vptr[y*row_inc] < (unsigned short *)limit) return;
 326         for (x = 0; x < 4; x++)
 327             vptr[y*row_inc + x] = MAKECOLOUR15(cb[x/2+(y/2)*2]->r[x%2+(y%2)*2], cb[x/2+(y/2)*2]->g[x%2+(y%2)*2], cb[x/2+(y/2)*2]->b[x%2+(y%2)*2]);
 328     }
 329 }
 330
 331
 332 /* ------------------------------------------------------------------------
 333  * Call this function once at the start of the sequence and save the
 334  * returned context for calls to decode_cinepak().
 335  */
 336 static cinepak_info *decode_cinepak_init(void)
 337 {
 338     cinepak_info *cvinfo;
 339     int i;
 340
 341     cvinfo = ICCVID_Alloc( sizeof (cinepak_info), 1 );
 342     if( !cvinfo )
 343         return NULL;
 344     cvinfo->strip_num = 0;
 345
 346     if(uiclp == NULL)
 347     {
 348         uiclp = uiclip+512;
 349         for(i = -512; i < 512; i++)
 350             uiclp[i] = (i < 0 ? 0 : (i > 255 ? 255 : i));
 351     }
 352
 353     return cvinfo;
 354 }
 355
 356 static void free_cvinfo( cinepak_info *cvinfo )
 357 {
 358     unsigned int i;
 359
 360     for( i=0; i<cvinfo->strip_num; i++ )
 361     {
 362         ICCVID_Free(cvinfo->v4_codebook[i]);
 363         ICCVID_Free(cvinfo->v1_codebook[i]);
 364     }
 365     ICCVID_Free( cvinfo );
 366 }
 367
 368 typedef void (*fn_cvid_v1)(unsigned char *frm, unsigned char *limit,
 369                            int stride, cvid_codebook *cb);
 370 typedef void (*fn_cvid_v4)(unsigned char *frm, unsigned char *limit, int stride,
 371                            cvid_codebook *cb0, cvid_codebook *cb1,
 372                            cvid_codebook *cb2, cvid_codebook *cb3);
 373
 374 /* ------------------------------------------------------------------------
 375  * This function decodes a buffer containing a Cinepak encoded frame.
 376  *
 377  * context - the context created by decode_cinepak_init().
 378  * buf - the input buffer to be decoded
 379  * size - the size of the input buffer
 380  * frame - the output frame buffer (24 or 32 bit per pixel)
 381  * width - the width of the output frame
 382  * height - the height of the output frame
 383  * bit_per_pixel - the number of bits per pixel allocated to the output
 384  *   frame (only 24 or 32 bpp are supported)
 385  */
 386 static void decode_cinepak(cinepak_info *cvinfo, unsigned char *buf, int size,
 387            unsigned char *frame, unsigned int width, unsigned int height, int bit_per_pixel)
 388 {
 389     cvid_codebook *v4_codebook, *v1_codebook, *codebook = NULL;
 390     unsigned long x, y, y_bottom, frame_flags, strips, cv_width, cv_height,
 391                   cnum, strip_id, chunk_id, x0, y0, x1, y1, ci, flag, mask;
 392     long len, top_size, chunk_size;
 393     unsigned char *frm_ptr, *frm_end;
 394     unsigned int i, cur_strip;
 395     int d0, d1, d2, d3, frm_stride, bpp = 3;
 396     fn_cvid_v1 cvid_v1 = cvid_v1_24;
 397     fn_cvid_v4 cvid_v4 = cvid_v4_24;
 398
 399     x = y = 0;
 400     y_bottom = 0;
 401     in_buffer = buf;
 402
 403     frame_flags = get_byte();
 404     len = get_byte() << 16;
 405     len |= get_byte() << 8;
 406     len |= get_byte();
 407
 408     switch(bit_per_pixel)
 409         {
 410         case 15:
 411             bpp = 2;
 412             cvid_v1 = cvid_v1_15;
 413             cvid_v4 = cvid_v4_15;
 414             break;
 415         case 16:
 416             bpp = 2;
 417             cvid_v1 = cvid_v1_16;
 418             cvid_v4 = cvid_v4_16;
 419             break;
 420         case 24:
 421             bpp = 3;
 422             cvid_v1 = cvid_v1_24;
 423             cvid_v4 = cvid_v4_24;
 424             break;
 425         case 32:
 426             bpp = 4;
 427             cvid_v1 = cvid_v1_32;
 428             cvid_v4 = cvid_v4_32;
 429             break;
 430         }
 431
 432     frm_stride = width * bpp;
 433     frm_ptr = frame;
 434     frm_end = frm_ptr + width * height * bpp;
 435
 436     if(len != size)
 437         {
 438         if(len & 0x01) len++; /* AVIs tend to have a size mismatch */
 439         if(len != size)
 440             {
 441             ERR("CVID: corruption %d (QT/AVI) != %ld (CV)\n", size, len);
 442             /* return; */
 443             }
 444         }
 445
 446     cv_width = get_word();
 447     cv_height = get_word();
 448     strips = get_word();
 449
 450     if(strips > cvinfo->strip_num)
 451         {
 452         if(strips >= MAX_STRIPS)
 453             {
 454             ERR("CVID: strip overflow (more than %d)\n", MAX_STRIPS);
 455             return;
 456             }
 457
 458         for(i = cvinfo->strip_num; i < strips; i++)
 459             {
 460             if((cvinfo->v4_codebook[i] = (cvid_codebook *)ICCVID_Alloc(sizeof(cvid_codebook), 260)) == NULL)
 461                 {
 462                 ERR("CVID: codebook v4 alloc err\n");
 463                 return;
 464                 }
 465
 466             if((cvinfo->v1_codebook[i] = (cvid_codebook *)ICCVID_Alloc(sizeof(cvid_codebook), 260)) == NULL)
 467                 {
 468                 ERR("CVID: codebook v1 alloc err\n");
 469                 return;
 470                 }
 471             }
 472         }
 473     cvinfo->strip_num = strips;
 474
 475     TRACE("CVID: <%ld,%ld> strips %ld\n", cv_width, cv_height, strips);
 476
 477     for(cur_strip = 0; cur_strip < strips; cur_strip++)
 478         {
 479         v4_codebook = cvinfo->v4_codebook[cur_strip];
 480         v1_codebook = cvinfo->v1_codebook[cur_strip];
 481
 482         if((cur_strip > 0) && (!(frame_flags & 0x01)))
 483             {
 484             memcpy(cvinfo->v4_codebook[cur_strip], cvinfo->v4_codebook[cur_strip-1], 260 * sizeof(cvid_codebook));
 485             memcpy(cvinfo->v1_codebook[cur_strip], cvinfo->v1_codebook[cur_strip-1], 260 * sizeof(cvid_codebook));
 486             }
 487
 488         strip_id = get_word();        /* 1000 = key strip, 1100 = iter strip */
 489         top_size = get_word();
 490         y0 = get_word();        /* FIXME: most of these are ignored at the moment */
 491         x0 = get_word();
 492         y1 = get_word();
 493         x1 = get_word();
 494
 495         y_bottom += y1;
 496         top_size -= 12;
 497         x = 0;
 498         if(x1 != width)
 499             WARN("CVID: Warning x1 (%ld) != width (%d)\n", x1, width);
 500
 501         TRACE("   %d) %04lx %04ld <%ld,%ld> <%ld,%ld> yt %ld\n",
 502               cur_strip, strip_id, top_size, x0, y0, x1, y1, y_bottom);
 503
 504         while(top_size > 0)
 505             {
 506             chunk_id  = get_word();
 507             chunk_size = get_word();
 508
 509             TRACE("        %04lx %04ld\n", chunk_id, chunk_size);
 510             top_size -= chunk_size;
 511             chunk_size -= 4;
 512
 513             switch(chunk_id)
 514                 {
 515                     /* -------------------- Codebook Entries -------------------- */
 516                 case 0x2000:
 517                 case 0x2200:
 518                     codebook = (chunk_id == 0x2200 ? v1_codebook : v4_codebook);
 519                     cnum = chunk_size/6;
 520                     for(i = 0; i < cnum; i++) read_codebook(codebook+i, 0);
 521                     break;
 522
 523                 case 0x2400:
 524                 case 0x2600:        /* 8 bit per pixel */
 525                     codebook = (chunk_id == 0x2600 ? v1_codebook : v4_codebook);
 526                     cnum = chunk_size/4;
 527                     for(i = 0; i < cnum; i++) read_codebook(codebook+i, 1);
 528                     break;
 529
 530                 case 0x2100:
 531                 case 0x2300:
 532                     codebook = (chunk_id == 0x2300 ? v1_codebook : v4_codebook);
 533
 534                     ci = 0;
 535                     while(chunk_size > 0)
 536                         {
 537                         flag = get_long();
 538                         chunk_size -= 4;
 539
 540                         for(i = 0; i < 32; i++)
 541                             {
 542                             if(flag & 0x80000000)
 543                                 {
 544                                 chunk_size -= 6;
 545                                 read_codebook(codebook+ci, 0);
 546                                 }
 547
 548                             ci++;
 549                             flag <<= 1;
 550                             }
 551                         }
 552                     while(chunk_size > 0) { skip_byte(); chunk_size--; }
 553                     break;
 554
 555                 case 0x2500:
 556                 case 0x2700:        /* 8 bit per pixel */
 557                     codebook = (chunk_id == 0x2700 ? v1_codebook : v4_codebook);
 558
 559                     ci = 0;
 560                     while(chunk_size > 0)
 561                         {
 562                         flag = get_long();
 563                         chunk_size -= 4;
 564
 565                         for(i = 0; i < 32; i++)
 566                             {
 567                             if(flag & 0x80000000)
 568                                 {
 569                                 chunk_size -= 4;
 570                                 read_codebook(codebook+ci, 1);
 571                                 }
 572
 573                             ci++;
 574                             flag <<= 1;
 575                             }
 576                         }
 577                     while(chunk_size > 0) { skip_byte(); chunk_size--; }
 578                     break;
 579
 580                     /* -------------------- Frame -------------------- */
 581                 case 0x3000:
 582                     while((chunk_size > 0) && (y < y_bottom))
 583                         {
 584                         flag = get_long();
 585                         chunk_size -= 4;
 586
 587                         for(i = 0; i < 32; i++)
 588                             {
 589                             if(y >= y_bottom) break;
 590                             if(flag & 0x80000000)    /* 4 bytes per block */
 591                                 {
 592                                 d0 = get_byte();
 593                                 d1 = get_byte();
 594                                 d2 = get_byte();
 595                                 d3 = get_byte();
 596                                 chunk_size -= 4;
 597 #ifdef ORIGINAL
 598                                 cvid_v4(frm_ptr + (y * frm_stride + x * bpp), frm_end, frm_stride, v4_codebook+d0, v4_codebook+d1, v4_codebook+d2, v4_codebook+d3);
 599 #else
 600                                 cvid_v4(frm_ptr + ((height - 1 - y) * frm_stride + x * bpp), frame, frm_stride, v4_codebook+d0, v4_codebook+d1, v4_codebook+d2, v4_codebook+d3);
 601 #endif
 602                                 }
 603                             else        /* 1 byte per block */
 604                                 {
 605 #ifdef ORIGINAL
 606                                 cvid_v1(frm_ptr + (y * frm_stride + x * bpp), frm_end, frm_stride, v1_codebook + get_byte());
 607 #else
 608                                 cvid_v1(frm_ptr + ((height - 1 - y) * frm_stride + x * bpp), frame, frm_stride, v1_codebook + get_byte());
 609 #endif
 610                                 chunk_size--;
 611                                 }
 612
 613                             x += 4;
 614                             if(x >= width)
 615                                 {
 616                                 x = 0;
 617                                 y += 4;
 618                                 }
 619                             flag <<= 1;
 620                             }
 621                         }
 622                     while(chunk_size > 0) { skip_byte(); chunk_size--; }
 623                     break;
 624
 625                 case 0x3100:
 626                     while((chunk_size > 0) && (y < y_bottom))
 627                         {
 628                             /* ---- flag bits: 0 = SKIP, 10 = V1, 11 = V4 ---- */
 629                         flag = (unsigned long)get_long();
 630                         chunk_size -= 4;
 631                         mask = 0x80000000;
 632
 633                         while((mask) && (y < y_bottom))
 634                             {
 635                             if(flag & mask)
 636                                 {
 637                                 if(mask == 1)
 638                                     {
 639                                     if(chunk_size < 0) break;
 640                                     flag = (unsigned long)get_long();
 641                                     chunk_size -= 4;
 642                                     mask = 0x80000000;
 643                                     }
 644                                 else mask >>= 1;
 645
 646                                 if(flag & mask)        /* V4 */
 647                                     {
 648                                     d0 = get_byte();
 649                                     d1 = get_byte();
 650                                     d2 = get_byte();
 651                                     d3 = get_byte();
 652                                     chunk_size -= 4;
 653 #ifdef ORIGINAL
 654                                     cvid_v4(frm_ptr + (y * frm_stride + x * bpp), frm_end, frm_stride, v4_codebook+d0, v4_codebook+d1, v4_codebook+d2, v4_codebook+d3);
 655 #else
 656                                     cvid_v4(frm_ptr + ((height - 1 - y) * frm_stride + x * bpp), frame, frm_stride, v4_codebook+d0, v4_codebook+d1, v4_codebook+d2, v4_codebook+d3);
 657 #endif
 658                                     }
 659                                 else        /* V1 */
 660                                     {
 661                                     chunk_size--;
 662 #ifdef ORIGINAL
 663                                     cvid_v1(frm_ptr + (y * frm_stride + x * bpp), frm_end, frm_stride, v1_codebook + get_byte());
 664 #else
 665                                     cvid_v1(frm_ptr + ((height - 1 - y) * frm_stride + x * bpp), frame, frm_stride, v1_codebook + get_byte());
 666 #endif
 667                                     }
 668                                 }        /* else SKIP */
 669
 670                             mask >>= 1;
 671                             x += 4;
 672                             if(x >= width)
 673                                 {
 674                                 x = 0;
 675                                 y += 4;
 676                                 }
 677                             }
 678                         }
 679
 680                     while(chunk_size > 0) { skip_byte(); chunk_size--; }
 681                     break;
 682
 683                 case 0x3200:        /* each byte is a V1 codebook */
 684                     while((chunk_size > 0) && (y < y_bottom))
 685                         {
 686 #ifdef ORIGINAL
 687                         cvid_v1(frm_ptr + (y * frm_stride + x * bpp), frm_end, frm_stride, v1_codebook + get_byte());
 688 #else
 689                         cvid_v1(frm_ptr + ((height - 1 - y) * frm_stride + x * bpp), frame, frm_stride, v1_codebook + get_byte());
 690 #endif
 691                         chunk_size--;
 692                         x += 4;
 693                         if(x >= width)
 694                             {
 695                             x = 0;
 696                             y += 4;
 697                             }
 698                         }
 699                     while(chunk_size > 0) { skip_byte(); chunk_size--; }
 700                     break;
 701
 702                 default:
 703                     ERR("CVID: unknown chunk_id %08lx\n", chunk_id);
 704                     while(chunk_size > 0) { skip_byte(); chunk_size--; }
 705                     break;
 706                 }
 707             }
 708         }
 709
 710     if(len != size)
 711         {
 712         if(len & 0x01) len++; /* AVIs tend to have a size mismatch */
 713         if(len != size)
 714             {
 715             long xlen;
 716             skip_byte();
 717             xlen = get_byte() << 16;
 718             xlen |= get_byte() << 8;
 719             xlen |= get_byte(); /* Read Len */
 720             WARN("CVID: END INFO chunk size %d cvid size1 %ld cvid size2 %ld\n",
 721                   size, len, xlen);
 722             }
 723         }
 724 }
 725
 726 static void ICCVID_dump_BITMAPINFO(const BITMAPINFO * bmi)
 727 {
 728     TRACE(
 729         "planes = %d\n"
 730         "bpp    = %d\n"
 731         "height = %ld\n"
 732         "width  = %ld\n"
 733         "compr  = %s\n",
 734         bmi->bmiHeader.biPlanes,
 735         bmi->bmiHeader.biBitCount,
 736         bmi->bmiHeader.biHeight,
 737         bmi->bmiHeader.biWidth,
 738         debugstr_an( (const char *)&bmi->bmiHeader.biCompression, 4 ) );
 739 }
 740
 741 static inline int ICCVID_CheckMask(RGBQUAD bmiColors[3], COLORREF redMask, COLORREF blueMask, COLORREF greenMask)
 742 {
 743     COLORREF realRedMask = MAKECOLOUR32(bmiColors[0].rgbRed, bmiColors[0].rgbGreen, bmiColors[0].rgbBlue);
 744     COLORREF realBlueMask = MAKECOLOUR32(bmiColors[1].rgbRed, bmiColors[1].rgbGreen, bmiColors[1].rgbBlue);
 745     COLORREF realGreenMask = MAKECOLOUR32(bmiColors[2].rgbRed, bmiColors[2].rgbGreen, bmiColors[2].rgbBlue);
 746
 747     TRACE("\nbmiColors[0] = 0x%08lx\nbmiColors[1] = 0x%08lx\nbmiColors[2] = 0x%08lx\n",
 748         realRedMask, realBlueMask, realGreenMask);
 749
 750     if ((realRedMask == redMask) &&
 751         (realBlueMask == blueMask) &&
 752         (realGreenMask == greenMask))
 753         return TRUE;
 754     return FALSE;
 755 }
 756
 757 static LRESULT ICCVID_DecompressQuery( ICCVID_Info *info, LPBITMAPINFO in, LPBITMAPINFO out )
 758 {
 759     TRACE("ICM_DECOMPRESS_QUERY %p %p %p\n", info, in, out);
 760
 761     if( (info==NULL) || (info->dwMagic!=ICCVID_MAGIC) )
 762         return ICERR_BADPARAM;
 763
 764     TRACE("in: ");
 765     ICCVID_dump_BITMAPINFO(in);
 766
 767     if( in->bmiHeader.biCompression != ICCVID_MAGIC )
 768         return ICERR_BADFORMAT;
 769
 770     if( out )
 771     {
 772         TRACE("out: ");
 773         ICCVID_dump_BITMAPINFO(out);
 774
 775         if( in->bmiHeader.biPlanes != out->bmiHeader.biPlanes )
 776             return ICERR_BADFORMAT;
 777         if( in->bmiHeader.biHeight != out->bmiHeader.biHeight )
 778             return ICERR_BADFORMAT;
 779         if( in->bmiHeader.biWidth != out->bmiHeader.biWidth )
 780             return ICERR_BADFORMAT;
 781
 782         switch( out->bmiHeader.biBitCount )
 783         {
 784         case 16:
 785             if ( out->bmiHeader.biCompression == BI_BITFIELDS )
 786             {
 787                 if ( !ICCVID_CheckMask(out->bmiColors, 0x7C00, 0x03E0, 0x001F) &&
 788                      !ICCVID_CheckMask(out->bmiColors, 0xF800, 0x07E0, 0x001F) )
 789                 {
 790                     TRACE("unsupported output bit field(s) for 16-bit colors\n");
 791                     return ICERR_BADFORMAT;
 792                 }
 793             }
 794             break;
 795         case 24:
 796         case 32:
 797             break;
 798         default:
 799             TRACE("unsupported output bitcount = %d\n", out->bmiHeader.biBitCount );
 800             return ICERR_BADFORMAT;
 801         }
 802     }
 803
 804     return ICERR_OK;
 805 }
 806
 807 static LRESULT ICCVID_DecompressGetFormat( ICCVID_Info *info, LPBITMAPINFO in, LPBITMAPINFO out )
 808 {
 809     DWORD size;
 810
 811     TRACE("ICM_DECOMPRESS_GETFORMAT %p %p %p\n", info, in, out);
 812
 813     if( (info==NULL) || (info->dwMagic!=ICCVID_MAGIC) )
 814         return ICERR_BADPARAM;
 815
 816     size = in->bmiHeader.biSize;
 817     if (in->bmiHeader.biBitCount <= 8)
 818         size += in->bmiHeader.biClrUsed * sizeof(RGBQUAD);
 819
 820     if( out )
 821     {
 822         memcpy( out, in, size );
 823         out->bmiHeader.biCompression = BI_RGB;
 824         out->bmiHeader.biSizeImage = in->bmiHeader.biHeight
 825                                    * in->bmiHeader.biWidth *4;
 826         return ICERR_OK;
 827     }
 828     return size;
 829 }
 830
 831 static LRESULT ICCVID_DecompressBegin( ICCVID_Info *info, LPBITMAPINFO in, LPBITMAPINFO out )
 832 {
 833     TRACE("ICM_DECOMPRESS_BEGIN %p %p %p\n", info, in, out);
 834
 835     if( (info==NULL) || (info->dwMagic!=ICCVID_MAGIC) )
 836         return ICERR_BADPARAM;
 837
 838     info->bits_per_pixel = out->bmiHeader.biBitCount;
 839
 840     if (info->bits_per_pixel == 16)
 841     {
 842         if ( out->bmiHeader.biCompression == BI_BITFIELDS )
 843         {
 844             if ( ICCVID_CheckMask(out->bmiColors, 0x7C00, 0x03E0, 0x001F) )
 845                 info->bits_per_pixel = 15;
 846             else if ( ICCVID_CheckMask(out->bmiColors, 0xF800, 0x07E0, 0x001F) )
 847                 info->bits_per_pixel = 16;
 848             else
 849             {
 850                 TRACE("unsupported output bit field(s) for 16-bit colors\n");
 851                 return ICERR_UNSUPPORTED;
 852             }
 853         }
 854         else
 855             info->bits_per_pixel = 15;
 856     }
 857
 858     TRACE("bit_per_pixel = %d\n", info->bits_per_pixel);
 859
 860     if( info->cvinfo )
 861         free_cvinfo( info->cvinfo );
 862     info->cvinfo = decode_cinepak_init();
 863
 864     return ICERR_OK;
 865 }
 866
 867 static LRESULT ICCVID_Decompress( ICCVID_Info *info, ICDECOMPRESS *icd, DWORD size )
 868 {
 869     LONG width, height;
 870
 871     TRACE("ICM_DECOMPRESS %p %p %ld\n", info, icd, size);
 872
 873     if( (info==NULL) || (info->dwMagic!=ICCVID_MAGIC) )
 874         return ICERR_BADPARAM;
 875
 876     width  = icd->lpbiInput->biWidth;
 877     height = icd->lpbiInput->biHeight;
 878
 879     decode_cinepak(info->cvinfo, icd->lpInput, icd->lpbiInput->biSizeImage,
 880                    icd->lpOutput, width, height, info->bits_per_pixel);
 881
 882     return ICERR_OK;
 883 }
 884
 885 static LRESULT ICCVID_DecompressEx( ICCVID_Info *info, ICDECOMPRESSEX *icd, DWORD size )
 886 {
 887     LONG width, height;
 888
 889     TRACE("ICM_DECOMPRESSEX %p %p %ld\n", info, icd, size);
 890
 891     if( (info==NULL) || (info->dwMagic!=ICCVID_MAGIC) )
 892         return ICERR_BADPARAM;
 893
 894     /* FIXME: flags are ignored */
 895
 896     width  = icd->lpbiSrc->biWidth;
 897     height = icd->lpbiSrc->biHeight;
 898
 899     decode_cinepak(info->cvinfo, icd->lpSrc, icd->lpbiSrc->biSizeImage,
 900                    icd->lpDst, width, height, info->bits_per_pixel);
 901
 902     return ICERR_OK;
 903 }
 904
 905 static LRESULT ICCVID_Close( ICCVID_Info *info )
 906 {
 907     if( (info==NULL) || (info->dwMagic!=ICCVID_MAGIC) )
 908         return 0;
 909     if( info->cvinfo )
 910         free_cvinfo( info->cvinfo );
 911     ICCVID_Free( info );
 912     return 1;
 913 }
 914
 915 static LRESULT ICCVID_GetInfo( ICCVID_Info *info, ICINFO *icinfo, DWORD dwSize )
 916 {
 917     if (!icinfo) return sizeof(ICINFO);
 918     if (dwSize < sizeof(ICINFO)) return 0;
 919
 920     icinfo->dwSize = sizeof(ICINFO);
 921     icinfo->fccType = ICTYPE_VIDEO;
 922     icinfo->fccHandler = info ? info->dwMagic : ICCVID_MAGIC;
 923     icinfo->dwFlags = 0;
 924     icinfo->dwVersion = ICVERSION;
 925     icinfo->dwVersionICM = ICVERSION;
 926
 927     LoadStringW(ICCVID_hModule, IDS_NAME, icinfo->szName, sizeof(icinfo->szName)/sizeof(WCHAR));
 928     LoadStringW(ICCVID_hModule, IDS_DESCRIPTION, icinfo->szDescription, sizeof(icinfo->szDescription)/sizeof(WCHAR));
 929     /* msvfw32 will fill icinfo->szDriver for us */
 930
 931     return sizeof(ICINFO);
 932 }
 933
 934 static LRESULT ICCVID_DecompressEnd( ICCVID_Info *info )
 935 {
 936     if( info->cvinfo )
 937     {
 938         free_cvinfo( info->cvinfo );
 939         info->cvinfo = NULL;
 940     }
 941     return ICERR_OK;
 942 }
 943
 944 LRESULT WINAPI ICCVID_DriverProc( DWORD_PTR dwDriverId, HDRVR hdrvr, UINT msg,
 945                                   LPARAM lParam1, LPARAM lParam2)
 946 {
 947     ICCVID_Info *info = (ICCVID_Info *) dwDriverId;
 948
 949     TRACE("%ld %p %d %ld %ld\n", dwDriverId, hdrvr, msg, lParam1, lParam2);
 950
 951     switch( msg )
 952     {
 953     case DRV_LOAD:
 954         TRACE("Loaded\n");
 955         return 1;
 956     case DRV_ENABLE:
 957         return 0;
 958     case DRV_DISABLE:
 959         return 0;
 960     case DRV_FREE:
 961         return 0;
 962
 963     case DRV_OPEN:
 964     {
 965         ICINFO *icinfo = (ICINFO *)lParam2;
 966
 967         TRACE("Opened\n");
 968
 969         if (icinfo && icinfo->fccType != ICTYPE_VIDEO) return 0;
 970
 971         info = ICCVID_Alloc( sizeof (ICCVID_Info), 1 );
 972         if( info )
 973         {
 974             info->dwMagic = ICCVID_MAGIC;
 975             info->cvinfo = NULL;
 976         }
 977         return (LRESULT) info;
 978     }
 979
 980     case DRV_CLOSE:
 981         return ICCVID_Close( info );
 982
 983     case ICM_GETINFO:
 984         return ICCVID_GetInfo( info, (ICINFO *)lParam1, (DWORD)lParam2 );
 985
 986     case ICM_DECOMPRESS_QUERY:
 987         return ICCVID_DecompressQuery( info, (LPBITMAPINFO) lParam1,
 988                                        (LPBITMAPINFO) lParam2 );
 989     case ICM_DECOMPRESS_GET_FORMAT:
 990         return ICCVID_DecompressGetFormat( info, (LPBITMAPINFO) lParam1,
 991                                        (LPBITMAPINFO) lParam2 );
 992     case ICM_DECOMPRESS_BEGIN:
 993         return ICCVID_DecompressBegin( info, (LPBITMAPINFO) lParam1,
 994                                        (LPBITMAPINFO) lParam2 );
 995     case ICM_DECOMPRESS:
 996         return ICCVID_Decompress( info, (ICDECOMPRESS*) lParam1,
 997                                   (DWORD) lParam2 );
 998     case ICM_DECOMPRESSEX:
 999         return ICCVID_DecompressEx( info, (ICDECOMPRESSEX*) lParam1,
1000                                   (DWORD) lParam2 );
1001
1002     case ICM_DECOMPRESS_END:
1003         return ICCVID_DecompressEnd( info );
1004
1005     case ICM_COMPRESS_QUERY:
1006         FIXME("compression not implemented\n");
1007         return ICERR_BADFORMAT;
1008
1009     case ICM_CONFIGURE:
1010         return ICERR_UNSUPPORTED;
1011
1012     default:
1013         FIXME("Unknown message: %04x %ld %ld\n", msg, lParam1, lParam2);
1014     }
1015     return ICERR_UNSUPPORTED;
1016 }
1017
1018 BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
1019 {
1020     TRACE("(%p,%ld,%p)\n", hModule, dwReason, lpReserved);
1021
1022     switch (dwReason)
1023     {
1024     case DLL_PROCESS_ATTACH:
1025         DisableThreadLibraryCalls(hModule);
1026         ICCVID_hModule = hModule;
1027         break;
1028
1029     case DLL_PROCESS_DETACH:
1030         break;
1031     }
1032     return TRUE;
1033 }