libavcodec/indeo3.c

   1 /*
   2  * Intel Indeo 3 (IV31, IV32, etc.) video decoder for ffmpeg
   3  * written, produced, and directed by Alan Smithee
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26
  27 #include "avcodec.h"
  28 #include "dsputil.h"
  29 #include "bytestream.h"
  30
  31 #include "indeo3data.h"
  32
  33 typedef struct
  34 {
  35     uint8_t *Ybuf;
  36     uint8_t *Ubuf;
  37     uint8_t *Vbuf;
  38     unsigned short y_w, y_h;
  39     unsigned short uv_w, uv_h;
  40 } YUVBufs;
  41
  42 typedef struct Indeo3DecodeContext {
  43     AVCodecContext *avctx;
  44     int width, height;
  45     AVFrame frame;
  46
  47     uint8_t *buf;
  48     YUVBufs iv_frame[2];
  49     YUVBufs *cur_frame;
  50     YUVBufs *ref_frame;
  51
  52     uint8_t *ModPred;
  53     uint8_t *corrector_type;
  54 } Indeo3DecodeContext;
  55
  56 static const uint8_t corrector_type_0[24] = {
  57     195, 159, 133, 115, 101,  93,  87,  77,
  58     195, 159, 133, 115, 101,  93,  87,  77,
  59     128,  79,  79,  79,  79,  79,  79,  79
  60 };
  61
  62 static const uint8_t corrector_type_2[8] = { 9, 7, 6, 8, 5, 4, 3, 2 };
  63
  64 static av_cold int build_modpred(Indeo3DecodeContext *s)
  65 {
  66     int i, j;
  67
  68     if (!(s->ModPred = av_malloc(8 * 128)))
  69         return AVERROR(ENOMEM);
  70
  71     for (i=0; i < 128; ++i) {
  72         s->ModPred[i+0*128] = i >  126 ? 254 : 2*(i + 1 - ((i + 1) % 2));
  73         s->ModPred[i+1*128] = i ==   7 ?  20 :
  74                               i == 119 ||
  75                               i == 120 ? 236 : 2*(i + 2 - ((i + 1) % 3));
  76         s->ModPred[i+2*128] = i >  125 ? 248 : 2*(i + 2 - ((i + 2) % 4));
  77         s->ModPred[i+3*128] =                  2*(i + 1 - ((i - 3) % 5));
  78         s->ModPred[i+4*128] = i ==   8 ?  20 : 2*(i + 1 - ((i - 3) % 6));
  79         s->ModPred[i+5*128] =                  2*(i + 4 - ((i + 3) % 7));
  80         s->ModPred[i+6*128] = i >  123 ? 240 : 2*(i + 4 - ((i + 4) % 8));
  81         s->ModPred[i+7*128] =                  2*(i + 5 - ((i + 4) % 9));
  82     }
  83
  84     if (!(s->corrector_type = av_malloc(24 * 256)))
  85         return AVERROR(ENOMEM);
  86
  87     for (i=0; i < 24; ++i) {
  88         for (j=0; j < 256; ++j) {
  89             s->corrector_type[i*256+j] = j < corrector_type_0[i]          ? 1 :
  90                                          j < 248 || (i == 16 && j == 248) ? 0 :
  91                                          corrector_type_2[j - 248];
  92         }
  93     }
  94
  95   return 0;
  96 }
  97
  98 static av_cold int iv_alloc_frames(Indeo3DecodeContext *s)
  99 {
 100     int luma_width    = (s->width           + 3) & ~3,
 101         luma_height   = (s->height          + 3) & ~3,
 102         chroma_width  = ((luma_width  >> 2) + 3) & ~3,
 103         chroma_height = ((luma_height >> 2) + 3) & ~3,
 104         luma_pixels   = luma_width   * luma_height,
 105         chroma_pixels = chroma_width * chroma_height,
 106         i;
 107     unsigned int bufsize = luma_pixels * 2 + luma_width * 3 +
 108                           (chroma_pixels   + chroma_width) * 4;
 109
 110     if(!(s->buf = av_malloc(bufsize)))
 111         return AVERROR(ENOMEM);
 112     s->iv_frame[0].y_w = s->iv_frame[1].y_w = luma_width;
 113     s->iv_frame[0].y_h = s->iv_frame[1].y_h = luma_height;
 114     s->iv_frame[0].uv_w = s->iv_frame[1].uv_w = chroma_width;
 115     s->iv_frame[0].uv_h = s->iv_frame[1].uv_h = chroma_height;
 116
 117     s->iv_frame[0].Ybuf = s->buf + luma_width;
 118     i = luma_pixels + luma_width * 2;
 119     s->iv_frame[1].Ybuf = s->buf + i;
 120     i += (luma_pixels + luma_width);
 121     s->iv_frame[0].Ubuf = s->buf + i;
 122     i += (chroma_pixels + chroma_width);
 123     s->iv_frame[1].Ubuf = s->buf + i;
 124     i += (chroma_pixels + chroma_width);
 125     s->iv_frame[0].Vbuf = s->buf + i;
 126     i += (chroma_pixels + chroma_width);
 127     s->iv_frame[1].Vbuf = s->buf + i;
 128
 129     for(i = 1; i <= luma_width; i++)
 130         s->iv_frame[0].Ybuf[-i] = s->iv_frame[1].Ybuf[-i] =
 131             s->iv_frame[0].Ubuf[-i] = 0x80;
 132
 133     for(i = 1; i <= chroma_width; i++) {
 134         s->iv_frame[1].Ubuf[-i] = 0x80;
 135         s->iv_frame[0].Vbuf[-i] = 0x80;
 136         s->iv_frame[1].Vbuf[-i] = 0x80;
 137         s->iv_frame[1].Vbuf[chroma_pixels+i-1] = 0x80;
 138     }
 139
 140     return 0;
 141 }
 142
 143 static av_cold void iv_free_func(Indeo3DecodeContext *s)
 144 {
 145     av_free(s->buf);
 146     av_free(s->ModPred);
 147     av_free(s->corrector_type);
 148 }
 149
 150 typedef struct {
 151     long xpos;
 152     long ypos;
 153     long width;
 154     long height;
 155     long split_flag;
 156     long split_direction;
 157     long usl7;
 158 } ustr_t;
 159
 160
 161 #define LV1_CHECK(buf1,rle_v3,lv1,lp2)  \
 162     if((lv1 & 0x80) != 0) {             \
 163         if(rle_v3 != 0)                 \
 164             rle_v3 = 0;                 \
 165         else {                          \
 166             rle_v3 = 1;                 \
 167             buf1 -= 2;                  \
 168         }                               \
 169     }                                   \
 170     lp2 = 4;
 171
 172
 173 #define RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)  \
 174     if(rle_v3 == 0) {                            \
 175         rle_v2 = *buf1;                          \
 176         rle_v1 = 1;                              \
 177         if(rle_v2 > 32) {                        \
 178             rle_v2 -= 32;                        \
 179             rle_v1 = 0;                          \
 180         }                                        \
 181         rle_v3 = 1;                              \
 182     }                                            \
 183     buf1--;
 184
 185
 186 #define LP2_CHECK(buf1,rle_v3,lp2)  \
 187     if(lp2 == 0 && rle_v3 != 0)     \
 188         rle_v3 = 0;                 \
 189     else {                          \
 190         buf1--;                     \
 191         rle_v3 = 1;                 \
 192     }
 193
 194
 195 #define RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) \
 196     rle_v2--;                                 \
 197     if(rle_v2 == 0) {                         \
 198         rle_v3 = 0;                           \
 199         buf1 += 2;                            \
 200     }                                         \
 201     lp2 = 4;
 202
 203 static void iv_Decode_Chunk(Indeo3DecodeContext *s,
 204         uint8_t *cur, uint8_t *ref, int width, int height,
 205         const uint8_t *buf1, long cb_offset, const uint8_t *hdr,
 206         const uint8_t *buf2, int min_width_160)
 207 {
 208     uint8_t bit_buf;
 209     unsigned long bit_pos, lv, lv1, lv2;
 210     long *width_tbl, width_tbl_arr[10];
 211     const signed char *ref_vectors;
 212     uint8_t *cur_frm_pos, *ref_frm_pos, *cp, *cp2;
 213     uint32_t *cur_lp, *ref_lp;
 214     const uint32_t *correction_lp[2], *correctionloworder_lp[2], *correctionhighorder_lp[2];
 215     uint8_t *correction_type_sp[2];
 216     ustr_t strip_tbl[20], *strip;
 217     int i, j, k, lp1, lp2, flag1, cmd, blks_width, blks_height, region_160_width,
 218         rle_v1, rle_v2, rle_v3;
 219     unsigned short res;
 220
 221     bit_buf = 0;
 222     ref_vectors = NULL;
 223
 224     width_tbl = width_tbl_arr + 1;
 225     i = (width < 0 ? width + 3 : width)/4;
 226     for(j = -1; j < 8; j++)
 227         width_tbl[j] = i * j;
 228
 229     strip = strip_tbl;
 230
 231     for(region_160_width = 0; region_160_width < (width - min_width_160); region_160_width += min_width_160);
 232
 233     strip->ypos = strip->xpos = 0;
 234     for(strip->width = min_width_160; width > strip->width; strip->width *= 2);
 235     strip->height = height;
 236     strip->split_direction = 0;
 237     strip->split_flag = 0;
 238     strip->usl7 = 0;
 239
 240     bit_pos = 0;
 241
 242     rle_v1 = rle_v2 = rle_v3 = 0;
 243
 244     while(strip >= strip_tbl) {
 245         if(bit_pos <= 0) {
 246             bit_pos = 8;
 247             bit_buf = *buf1++;
 248         }
 249
 250         bit_pos -= 2;
 251         cmd = (bit_buf >> bit_pos) & 0x03;
 252
 253         if(cmd == 0) {
 254             strip++;
 255             memcpy(strip, strip-1, sizeof(ustr_t));
 256             strip->split_flag = 1;
 257             strip->split_direction = 0;
 258             strip->height = (strip->height > 8 ? ((strip->height+8)>>4)<<3 : 4);
 259             continue;
 260         } else if(cmd == 1) {
 261             strip++;
 262             memcpy(strip, strip-1, sizeof(ustr_t));
 263             strip->split_flag = 1;
 264             strip->split_direction = 1;
 265             strip->width = (strip->width > 8 ? ((strip->width+8)>>4)<<3 : 4);
 266             continue;
 267         } else if(cmd == 2) {
 268             if(strip->usl7 == 0) {
 269                 strip->usl7 = 1;
 270                 ref_vectors = NULL;
 271                 continue;
 272             }
 273         } else if(cmd == 3) {
 274             if(strip->usl7 == 0) {
 275                 strip->usl7 = 1;
 276                 ref_vectors = (const signed char*)buf2 + (*buf1 * 2);
 277                 buf1++;
 278                 continue;
 279             }
 280         }
 281
 282         cur_frm_pos = cur + width * strip->ypos + strip->xpos;
 283
 284         if((blks_width = strip->width) < 0)
 285             blks_width += 3;
 286         blks_width >>= 2;
 287         blks_height = strip->height;
 288
 289         if(ref_vectors != NULL) {
 290             ref_frm_pos = ref + (ref_vectors[0] + strip->ypos) * width +
 291                 ref_vectors[1] + strip->xpos;
 292         } else
 293             ref_frm_pos = cur_frm_pos - width_tbl[4];
 294
 295         if(cmd == 2) {
 296             if(bit_pos <= 0) {
 297                 bit_pos = 8;
 298                 bit_buf = *buf1++;
 299             }
 300
 301             bit_pos -= 2;
 302             cmd = (bit_buf >> bit_pos) & 0x03;
 303
 304             if(cmd == 0 || ref_vectors != NULL) {
 305                 for(lp1 = 0; lp1 < blks_width; lp1++) {
 306                     for(i = 0, j = 0; i < blks_height; i++, j += width_tbl[1])
 307                         ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];
 308                     cur_frm_pos += 4;
 309                     ref_frm_pos += 4;
 310                 }
 311             } else if(cmd != 1)
 312                 return;
 313         } else {
 314             k = *buf1 >> 4;
 315             j = *buf1 & 0x0f;
 316             buf1++;
 317             lv = j + cb_offset;
 318
 319             if((lv - 8) <= 7 && (k == 0 || k == 3 || k == 10)) {
 320                 cp2 = s->ModPred + ((lv - 8) << 7);
 321                 cp = ref_frm_pos;
 322                 for(i = 0; i < blks_width << 2; i++) {
 323                     int v = *cp >> 1;
 324                     *(cp++) = cp2[v];
 325                 }
 326             }
 327
 328             if(k == 1 || k == 4) {
 329                 lv = (hdr[j] & 0xf) + cb_offset;
 330                 correction_type_sp[0] = s->corrector_type + (lv << 8);
 331                 correction_lp[0] = correction + (lv << 8);
 332                 lv = (hdr[j] >> 4) + cb_offset;
 333                 correction_lp[1] = correction + (lv << 8);
 334                 correction_type_sp[1] = s->corrector_type + (lv << 8);
 335             } else {
 336                 correctionloworder_lp[0] = correctionloworder_lp[1] = correctionloworder + (lv << 8);
 337                 correctionhighorder_lp[0] = correctionhighorder_lp[1] = correctionhighorder + (lv << 8);
 338                 correction_type_sp[0] = correction_type_sp[1] = s->corrector_type + (lv << 8);
 339                 correction_lp[0] = correction_lp[1] = correction + (lv << 8);
 340             }
 341
 342             switch(k) {
 343             case 1:
 344             case 0:                    /********** CASE 0 **********/
 345                 for( ; blks_height > 0; blks_height -= 4) {
 346                     for(lp1 = 0; lp1 < blks_width; lp1++) {
 347                         for(lp2 = 0; lp2 < 4; ) {
 348                             k = *buf1++;
 349                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2];
 350                             ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2];
 351
 352                             switch(correction_type_sp[0][k]) {
 353                             case 0:
 354                                 *cur_lp = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
 355                                 lp2++;
 356                                 break;
 357                             case 1:
 358                                 res = ((le2me_16(((unsigned short *)(ref_lp))[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;
 359                                 ((unsigned short *)cur_lp)[0] = le2me_16(res);
 360                                 res = ((le2me_16(((unsigned short *)(ref_lp))[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
 361                                 ((unsigned short *)cur_lp)[1] = le2me_16(res);
 362                                 buf1++;
 363                                 lp2++;
 364                                 break;
 365                             case 2:
 366                                 if(lp2 == 0) {
 367                                     for(i = 0, j = 0; i < 2; i++, j += width_tbl[1])
 368                                         cur_lp[j] = ref_lp[j];
 369                                     lp2 += 2;
 370                                 }
 371                                 break;
 372                             case 3:
 373                                 if(lp2 < 2) {
 374                                     for(i = 0, j = 0; i < (3 - lp2); i++, j += width_tbl[1])
 375                                         cur_lp[j] = ref_lp[j];
 376                                     lp2 = 3;
 377                                 }
 378                                 break;
 379                             case 8:
 380                                 if(lp2 == 0) {
 381                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
 382
 383                                     if(rle_v1 == 1 || ref_vectors != NULL) {
 384                                         for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 385                                             cur_lp[j] = ref_lp[j];
 386                                     }
 387
 388                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
 389                                     break;
 390                                 } else {
 391                                     rle_v1 = 1;
 392                                     rle_v2 = *buf1 - 1;
 393                                 }
 394                             case 5:
 395                                 LP2_CHECK(buf1,rle_v3,lp2)
 396                             case 4:
 397                                 for(i = 0, j = 0; i < (4 - lp2); i++, j += width_tbl[1])
 398                                     cur_lp[j] = ref_lp[j];
 399                                 lp2 = 4;
 400                                 break;
 401
 402                             case 7:
 403                                 if(rle_v3 != 0)
 404                                     rle_v3 = 0;
 405                                 else {
 406                                     buf1--;
 407                                     rle_v3 = 1;
 408                                 }
 409                             case 6:
 410                                 if(ref_vectors != NULL) {
 411                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 412                                         cur_lp[j] = ref_lp[j];
 413                                 }
 414                                 lp2 = 4;
 415                                 break;
 416
 417                             case 9:
 418                                 lv1 = *buf1++;
 419                                 lv = (lv1 & 0x7F) << 1;
 420                                 lv += (lv << 8);
 421                                 lv += (lv << 16);
 422                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 423                                     cur_lp[j] = lv;
 424
 425                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
 426                                 break;
 427                             default:
 428                                 return;
 429                             }
 430                         }
 431
 432                         cur_frm_pos += 4;
 433                         ref_frm_pos += 4;
 434                     }
 435
 436                     cur_frm_pos += ((width - blks_width) * 4);
 437                     ref_frm_pos += ((width - blks_width) * 4);
 438                 }
 439                 break;
 440
 441             case 4:
 442             case 3:                    /********** CASE 3 **********/
 443                 if(ref_vectors != NULL)
 444                     return;
 445                 flag1 = 1;
 446
 447                 for( ; blks_height > 0; blks_height -= 8) {
 448                     for(lp1 = 0; lp1 < blks_width; lp1++) {
 449                         for(lp2 = 0; lp2 < 4; ) {
 450                             k = *buf1++;
 451
 452                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
 453                             ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];
 454
 455                             switch(correction_type_sp[lp2 & 0x01][k]) {
 456                             case 0:
 457                                 cur_lp[width_tbl[1]] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
 458                                 if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)
 459                                     cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 460                                 else
 461                                     cur_lp[0] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
 462                                 lp2++;
 463                                 break;
 464
 465                             case 1:
 466                                 res = ((le2me_16(((unsigned short *)ref_lp)[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;
 467                                 ((unsigned short *)cur_lp)[width_tbl[2]] = le2me_16(res);
 468                                 res = ((le2me_16(((unsigned short *)ref_lp)[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
 469                                 ((unsigned short *)cur_lp)[width_tbl[2]+1] = le2me_16(res);
 470
 471                                 if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)
 472                                     cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 473                                 else
 474                                     cur_lp[0] = cur_lp[width_tbl[1]];
 475                                 buf1++;
 476                                 lp2++;
 477                                 break;
 478
 479                             case 2:
 480                                 if(lp2 == 0) {
 481                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 482                                         cur_lp[j] = *ref_lp;
 483                                     lp2 += 2;
 484                                 }
 485                                 break;
 486
 487                             case 3:
 488                                 if(lp2 < 2) {
 489                                     for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])
 490                                         cur_lp[j] = *ref_lp;
 491                                     lp2 = 3;
 492                                 }
 493                                 break;
 494
 495                             case 6:
 496                                 lp2 = 4;
 497                                 break;
 498
 499                             case 7:
 500                                 if(rle_v3 != 0)
 501                                     rle_v3 = 0;
 502                                 else {
 503                                     buf1--;
 504                                     rle_v3 = 1;
 505                                 }
 506                                 lp2 = 4;
 507                                 break;
 508
 509                             case 8:
 510                                 if(lp2 == 0) {
 511                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
 512
 513                                     if(rle_v1 == 1) {
 514                                         for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
 515                                             cur_lp[j] = ref_lp[j];
 516                                     }
 517
 518                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
 519                                     break;
 520                                 } else {
 521                                     rle_v2 = (*buf1) - 1;
 522                                     rle_v1 = 1;
 523                                 }
 524                             case 5:
 525                                 LP2_CHECK(buf1,rle_v3,lp2)
 526                             case 4:
 527                                 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])
 528                                     cur_lp[j] = *ref_lp;
 529                                 lp2 = 4;
 530                                 break;
 531
 532                             case 9:
 533                                 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
 534                                 lv1 = *buf1++;
 535                                 lv = (lv1 & 0x7F) << 1;
 536                                 lv += (lv << 8);
 537                                 lv += (lv << 16);
 538
 539                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 540                                     cur_lp[j] = lv;
 541
 542                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
 543                                 break;
 544
 545                             default:
 546                                 return;
 547                             }
 548                         }
 549
 550                         cur_frm_pos += 4;
 551                     }
 552
 553                     cur_frm_pos += (((width * 2) - blks_width) * 4);
 554                     flag1 = 0;
 555                 }
 556                 break;
 557
 558             case 10:                    /********** CASE 10 **********/
 559                 if(ref_vectors == NULL) {
 560                     flag1 = 1;
 561
 562                     for( ; blks_height > 0; blks_height -= 8) {
 563                         for(lp1 = 0; lp1 < blks_width; lp1 += 2) {
 564                             for(lp2 = 0; lp2 < 4; ) {
 565                                 k = *buf1++;
 566                                 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
 567                                 ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];
 568                                 lv1 = ref_lp[0];
 569                                 lv2 = ref_lp[1];
 570                                 if(lp2 == 0 && flag1 != 0) {
 571 #ifdef WORDS_BIGENDIAN
 572                                     lv1 = lv1 & 0xFF00FF00;
 573                                     lv1 = (lv1 >> 8) | lv1;
 574                                     lv2 = lv2 & 0xFF00FF00;
 575                                     lv2 = (lv2 >> 8) | lv2;
 576 #else
 577                                     lv1 = lv1 & 0x00FF00FF;
 578                                     lv1 = (lv1 << 8) | lv1;
 579                                     lv2 = lv2 & 0x00FF00FF;
 580                                     lv2 = (lv2 << 8) | lv2;
 581 #endif
 582                                 }
 583
 584                                 switch(correction_type_sp[lp2 & 0x01][k]) {
 585                                 case 0:
 586                                     cur_lp[width_tbl[1]] = le2me_32(((le2me_32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);
 587                                     cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(lv2) >> 1) + correctionhighorder_lp[lp2 & 0x01][k]) << 1);
 588                                     if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {
 589                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 590                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 591                                     } else {
 592                                         cur_lp[0] = cur_lp[width_tbl[1]];
 593                                         cur_lp[1] = cur_lp[width_tbl[1]+1];
 594                                     }
 595                                     lp2++;
 596                                     break;
 597
 598                                 case 1:
 599                                     cur_lp[width_tbl[1]] = le2me_32(((le2me_32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][*buf1]) << 1);
 600                                     cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(lv2) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);
 601                                     if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {
 602                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 603                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 604                                     } else {
 605                                         cur_lp[0] = cur_lp[width_tbl[1]];
 606                                         cur_lp[1] = cur_lp[width_tbl[1]+1];
 607                                     }
 608                                     buf1++;
 609                                     lp2++;
 610                                     break;
 611
 612                                 case 2:
 613                                     if(lp2 == 0) {
 614                                         if(flag1 != 0) {
 615                                             for(i = 0, j = width_tbl[1]; i < 3; i++, j += width_tbl[1]) {
 616                                                 cur_lp[j] = lv1;
 617                                                 cur_lp[j+1] = lv2;
 618                                             }
 619                                             cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 620                                             cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 621                                         } else {
 622                                             for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {
 623                                                 cur_lp[j] = lv1;
 624                                                 cur_lp[j+1] = lv2;
 625                                             }
 626                                         }
 627                                         lp2 += 2;
 628                                     }
 629                                     break;
 630
 631                                 case 3:
 632                                     if(lp2 < 2) {
 633                                         if(lp2 == 0 && flag1 != 0) {
 634                                             for(i = 0, j = width_tbl[1]; i < 5; i++, j += width_tbl[1]) {
 635                                                 cur_lp[j] = lv1;
 636                                                 cur_lp[j+1] = lv2;
 637                                             }
 638                                             cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 639                                             cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 640                                         } else {
 641                                             for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {
 642                                                 cur_lp[j] = lv1;
 643                                                 cur_lp[j+1] = lv2;
 644                                             }
 645                                         }
 646                                         lp2 = 3;
 647                                     }
 648                                     break;
 649
 650                                 case 8:
 651                                     if(lp2 == 0) {
 652                                         RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
 653                                         if(rle_v1 == 1) {
 654                                             if(flag1 != 0) {
 655                                                 for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {
 656                                                     cur_lp[j] = lv1;
 657                                                     cur_lp[j+1] = lv2;
 658                                                 }
 659                                                 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 660                                                 cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 661                                             } else {
 662                                                 for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {
 663                                                     cur_lp[j] = lv1;
 664                                                     cur_lp[j+1] = lv2;
 665                                                 }
 666                                             }
 667                                         }
 668                                         RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
 669                                         break;
 670                                     } else {
 671                                         rle_v1 = 1;
 672                                         rle_v2 = (*buf1) - 1;
 673                                     }
 674                                 case 5:
 675                                     LP2_CHECK(buf1,rle_v3,lp2)
 676                                 case 4:
 677                                     if(lp2 == 0 && flag1 != 0) {
 678                                         for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {
 679                                             cur_lp[j] = lv1;
 680                                             cur_lp[j+1] = lv2;
 681                                         }
 682                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 683                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 684                                     } else {
 685                                         for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {
 686                                             cur_lp[j] = lv1;
 687                                             cur_lp[j+1] = lv2;
 688                                         }
 689                                     }
 690                                     lp2 = 4;
 691                                     break;
 692
 693                                 case 6:
 694                                     lp2 = 4;
 695                                     break;
 696
 697                                 case 7:
 698                                     if(lp2 == 0) {
 699                                         if(rle_v3 != 0)
 700                                             rle_v3 = 0;
 701                                         else {
 702                                             buf1--;
 703                                             rle_v3 = 1;
 704                                         }
 705                                         lp2 = 4;
 706                                     }
 707                                     break;
 708
 709                                 case 9:
 710                                     av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
 711                                     lv1 = *buf1;
 712                                     lv = (lv1 & 0x7F) << 1;
 713                                     lv += (lv << 8);
 714                                     lv += (lv << 16);
 715                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
 716                                         cur_lp[j] = lv;
 717                                     LV1_CHECK(buf1,rle_v3,lv1,lp2)
 718                                     break;
 719
 720                                 default:
 721                                     return;
 722                                 }
 723                             }
 724
 725                             cur_frm_pos += 8;
 726                         }
 727
 728                         cur_frm_pos += (((width * 2) - blks_width) * 4);
 729                         flag1 = 0;
 730                     }
 731                 } else {
 732                     for( ; blks_height > 0; blks_height -= 8) {
 733                         for(lp1 = 0; lp1 < blks_width; lp1 += 2) {
 734                             for(lp2 = 0; lp2 < 4; ) {
 735                                 k = *buf1++;
 736                                 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
 737                                 ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];
 738
 739                                 switch(correction_type_sp[lp2 & 0x01][k]) {
 740                                 case 0:
 741                                     lv1 = correctionloworder_lp[lp2 & 0x01][k];
 742                                     lv2 = correctionhighorder_lp[lp2 & 0x01][k];
 743                                     cur_lp[0] = le2me_32(((le2me_32(ref_lp[0]) >> 1) + lv1) << 1);
 744                                     cur_lp[1] = le2me_32(((le2me_32(ref_lp[1]) >> 1) + lv2) << 1);
 745                                     cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);
 746                                     cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);
 747                                     lp2++;
 748                                     break;
 749
 750                                 case 1:
 751                                     lv1 = correctionloworder_lp[lp2 & 0x01][*buf1++];
 752                                     lv2 = correctionloworder_lp[lp2 & 0x01][k];
 753                                     cur_lp[0] = le2me_32(((le2me_32(ref_lp[0]) >> 1) + lv1) << 1);
 754                                     cur_lp[1] = le2me_32(((le2me_32(ref_lp[1]) >> 1) + lv2) << 1);
 755                                     cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);
 756                                     cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);
 757                                     lp2++;
 758                                     break;
 759
 760                                 case 2:
 761                                     if(lp2 == 0) {
 762                                         for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {
 763                                             cur_lp[j] = ref_lp[j];
 764                                             cur_lp[j+1] = ref_lp[j+1];
 765                                         }
 766                                         lp2 += 2;
 767                                     }
 768                                     break;
 769
 770                                 case 3:
 771                                     if(lp2 < 2) {
 772                                         for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {
 773                                             cur_lp[j] = ref_lp[j];
 774                                             cur_lp[j+1] = ref_lp[j+1];
 775                                         }
 776                                         lp2 = 3;
 777                                     }
 778                                     break;
 779
 780                                 case 8:
 781                                     if(lp2 == 0) {
 782                                         RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
 783                                         for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {
 784                                             ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];
 785                                             ((uint32_t *)cur_frm_pos)[j+1] = ((uint32_t *)ref_frm_pos)[j+1];
 786                                         }
 787                                         RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
 788                                         break;
 789                                     } else {
 790                                         rle_v1 = 1;
 791                                         rle_v2 = (*buf1) - 1;
 792                                     }
 793                                 case 5:
 794                                 case 7:
 795                                     LP2_CHECK(buf1,rle_v3,lp2)
 796                                 case 6:
 797                                 case 4:
 798                                     for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {
 799                                         cur_lp[j] = ref_lp[j];
 800                                         cur_lp[j+1] = ref_lp[j+1];
 801                                     }
 802                                     lp2 = 4;
 803                                     break;
 804
 805                                 case 9:
 806                                     av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
 807                                     lv1 = *buf1;
 808                                     lv = (lv1 & 0x7F) << 1;
 809                                     lv += (lv << 8);
 810                                     lv += (lv << 16);
 811                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
 812                                         ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)cur_frm_pos)[j+1] = lv;
 813                                     LV1_CHECK(buf1,rle_v3,lv1,lp2)
 814                                     break;
 815
 816                                 default:
 817                                     return;
 818                                 }
 819                             }
 820
 821                             cur_frm_pos += 8;
 822                             ref_frm_pos += 8;
 823                         }
 824
 825                         cur_frm_pos += (((width * 2) - blks_width) * 4);
 826                         ref_frm_pos += (((width * 2) - blks_width) * 4);
 827                     }
 828                 }
 829                 break;
 830
 831             case 11:                    /********** CASE 11 **********/
 832                 if(ref_vectors == NULL)
 833                     return;
 834
 835                 for( ; blks_height > 0; blks_height -= 8) {
 836                     for(lp1 = 0; lp1 < blks_width; lp1++) {
 837                         for(lp2 = 0; lp2 < 4; ) {
 838                             k = *buf1++;
 839                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
 840                             ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];
 841
 842                             switch(correction_type_sp[lp2 & 0x01][k]) {
 843                             case 0:
 844                                 cur_lp[0] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
 845                                 cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
 846                                 lp2++;
 847                                 break;
 848
 849                             case 1:
 850                                 lv1 = (unsigned short)(correction_lp[lp2 & 0x01][*buf1++]);
 851                                 lv2 = (unsigned short)(correction_lp[lp2 & 0x01][k]);
 852                                 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[0]) >> 1) + lv1) << 1);
 853                                 ((unsigned short *)cur_lp)[0] = le2me_16(res);
 854                                 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[1]) >> 1) + lv2) << 1);
 855                                 ((unsigned short *)cur_lp)[1] = le2me_16(res);
 856                                 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[width_tbl[2]]) >> 1) + lv1) << 1);
 857                                 ((unsigned short *)cur_lp)[width_tbl[2]] = le2me_16(res);
 858                                 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[width_tbl[2]+1]) >> 1) + lv2) << 1);
 859                                 ((unsigned short *)cur_lp)[width_tbl[2]+1] = le2me_16(res);
 860                                 lp2++;
 861                                 break;
 862
 863                             case 2:
 864                                 if(lp2 == 0) {
 865                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 866                                         cur_lp[j] = ref_lp[j];
 867                                     lp2 += 2;
 868                                 }
 869                                 break;
 870
 871                             case 3:
 872                                 if(lp2 < 2) {
 873                                     for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])
 874                                         cur_lp[j] = ref_lp[j];
 875                                     lp2 = 3;
 876                                 }
 877                                 break;
 878
 879                             case 8:
 880                                 if(lp2 == 0) {
 881                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
 882
 883                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
 884                                         cur_lp[j] = ref_lp[j];
 885
 886                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
 887                                     break;
 888                                 } else {
 889                                     rle_v1 = 1;
 890                                     rle_v2 = (*buf1) - 1;
 891                                 }
 892                             case 5:
 893                             case 7:
 894                                 LP2_CHECK(buf1,rle_v3,lp2)
 895                             case 4:
 896                             case 6:
 897                                 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])
 898                                     cur_lp[j] = ref_lp[j];
 899                                 lp2 = 4;
 900                                 break;
 901
 902                             case 9:
 903                                 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
 904                                 lv1 = *buf1++;
 905                                 lv = (lv1 & 0x7F) << 1;
 906                                 lv += (lv << 8);
 907                                 lv += (lv << 16);
 908                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 909                                     cur_lp[j] = lv;
 910                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
 911                                 break;
 912
 913                             default:
 914                                 return;
 915                             }
 916                         }
 917
 918                         cur_frm_pos += 4;
 919                         ref_frm_pos += 4;
 920                     }
 921
 922                     cur_frm_pos += (((width * 2) - blks_width) * 4);
 923                     ref_frm_pos += (((width * 2) - blks_width) * 4);
 924                 }
 925                 break;
 926
 927             default:
 928                 return;
 929             }
 930         }
 931
 932         if(strip < strip_tbl)
 933             return;
 934
 935         for( ; strip >= strip_tbl; strip--) {
 936             if(strip->split_flag != 0) {
 937                 strip->split_flag = 0;
 938                 strip->usl7 = (strip-1)->usl7;
 939
 940                 if(strip->split_direction) {
 941                     strip->xpos += strip->width;
 942                     strip->width = (strip-1)->width - strip->width;
 943                     if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)
 944                         strip->width = width - strip->xpos;
 945                 } else {
 946                     strip->ypos += strip->height;
 947                     strip->height = (strip-1)->height - strip->height;
 948                 }
 949                 break;
 950             }
 951         }
 952     }
 953 }
 954
 955 static av_cold int indeo3_decode_init(AVCodecContext *avctx)
 956 {
 957     Indeo3DecodeContext *s = avctx->priv_data;
 958     int ret = 0;
 959
 960     s->avctx = avctx;
 961     s->width = avctx->width;
 962     s->height = avctx->height;
 963     avctx->pix_fmt = PIX_FMT_YUV410P;
 964
 965     if (!(ret = build_modpred(s)))
 966         ret = iv_alloc_frames(s);
 967     if (ret)
 968         iv_free_func(s);
 969
 970     return ret;
 971 }
 972
 973 static unsigned long iv_decode_frame(Indeo3DecodeContext *s,
 974                                      const uint8_t *buf, int buf_size)
 975 {
 976     unsigned int image_width, image_height,
 977                  chroma_width, chroma_height;
 978     unsigned long flags, cb_offset, data_size,
 979                   y_offset, v_offset, u_offset, mc_vector_count;
 980     const uint8_t *hdr_pos, *buf_pos;
 981
 982     buf_pos = buf;
 983     buf_pos += 18; /* skip OS header (16 bytes) and version number */
 984
 985     flags = bytestream_get_le16(&buf_pos);
 986     data_size = bytestream_get_le32(&buf_pos);
 987     cb_offset = *buf_pos++;
 988     buf_pos += 3; /* skip reserved byte and checksum */
 989     image_height = bytestream_get_le16(&buf_pos);
 990     image_width  = bytestream_get_le16(&buf_pos);
 991
 992     if(avcodec_check_dimensions(NULL, image_width, image_height))
 993         return -1;
 994
 995     chroma_height = ((image_height >> 2) + 3) & 0x7ffc;
 996     chroma_width = ((image_width >> 2) + 3) & 0x7ffc;
 997     y_offset = bytestream_get_le32(&buf_pos);
 998     v_offset = bytestream_get_le32(&buf_pos);
 999     u_offset = bytestream_get_le32(&buf_pos);
1000     buf_pos += 4; /* reserved */
1001     hdr_pos = buf_pos;
1002     if(data_size == 0x80) return 4;
1003
1004     if(flags & 0x200) {
1005         s->cur_frame = s->iv_frame + 1;
1006         s->ref_frame = s->iv_frame;
1007     } else {
1008         s->cur_frame = s->iv_frame;
1009         s->ref_frame = s->iv_frame + 1;
1010     }
1011
1012     buf_pos = buf + 16 + y_offset;
1013     mc_vector_count = bytestream_get_le32(&buf_pos);
1014
1015     iv_Decode_Chunk(s, s->cur_frame->Ybuf, s->ref_frame->Ybuf, image_width,
1016                     image_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
1017                     FFMIN(image_width, 160));
1018
1019     if (!(s->avctx->flags & CODEC_FLAG_GRAY))
1020     {
1021
1022         buf_pos = buf + 16 + v_offset;
1023         mc_vector_count = bytestream_get_le32(&buf_pos);
1024
1025         iv_Decode_Chunk(s, s->cur_frame->Vbuf, s->ref_frame->Vbuf, chroma_width,
1026                 chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
1027                 FFMIN(chroma_width, 40));
1028
1029         buf_pos = buf + 16 + u_offset;
1030         mc_vector_count = bytestream_get_le32(&buf_pos);
1031
1032         iv_Decode_Chunk(s, s->cur_frame->Ubuf, s->ref_frame->Ubuf, chroma_width,
1033                 chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
1034                 FFMIN(chroma_width, 40));
1035
1036     }
1037
1038     return 8;
1039 }
1040
1041 static int indeo3_decode_frame(AVCodecContext *avctx,
1042                                void *data, int *data_size,
1043                                const uint8_t *buf, int buf_size)
1044 {
1045     Indeo3DecodeContext *s=avctx->priv_data;
1046     uint8_t *src, *dest;
1047     int y;
1048
1049     iv_decode_frame(s, buf, buf_size);
1050
1051     if(s->frame.data[0])
1052         avctx->release_buffer(avctx, &s->frame);
1053
1054     s->frame.reference = 0;
1055     if(avctx->get_buffer(avctx, &s->frame) < 0) {
1056         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1057         return -1;
1058     }
1059
1060     src = s->cur_frame->Ybuf;
1061     dest = s->frame.data[0];
1062     for (y = 0; y < s->height; y++) {
1063         memcpy(dest, src, s->cur_frame->y_w);
1064         src += s->cur_frame->y_w;
1065         dest += s->frame.linesize[0];
1066     }
1067
1068     if (!(s->avctx->flags & CODEC_FLAG_GRAY))
1069     {
1070         src = s->cur_frame->Ubuf;
1071         dest = s->frame.data[1];
1072         for (y = 0; y < s->height / 4; y++) {
1073             memcpy(dest, src, s->cur_frame->uv_w);
1074             src += s->cur_frame->uv_w;
1075             dest += s->frame.linesize[1];
1076         }
1077
1078         src = s->cur_frame->Vbuf;
1079         dest = s->frame.data[2];
1080         for (y = 0; y < s->height / 4; y++) {
1081             memcpy(dest, src, s->cur_frame->uv_w);
1082             src += s->cur_frame->uv_w;
1083             dest += s->frame.linesize[2];
1084         }
1085     }
1086
1087     *data_size=sizeof(AVFrame);
1088     *(AVFrame*)data= s->frame;
1089
1090     return buf_size;
1091 }
1092
1093 static av_cold int indeo3_decode_end(AVCodecContext *avctx)
1094 {
1095     Indeo3DecodeContext *s = avctx->priv_data;
1096
1097     iv_free_func(s);
1098
1099     return 0;
1100 }
1101
1102 AVCodec indeo3_decoder = {
1103     "indeo3",
1104     CODEC_TYPE_VIDEO,
1105     CODEC_ID_INDEO3,
1106     sizeof(Indeo3DecodeContext),
1107     indeo3_decode_init,
1108     NULL,
1109     indeo3_decode_end,
1110     indeo3_decode_frame,
1111     0,
1112     NULL,
1113     .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),
1114 };