git.sesse.net Git - ffmpeg/blob - libavcodec/indeo3.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 /**
  20  * @file
  21  * Intel Indeo 3 (IV31, IV32, etc.) video decoder for FFmpeg
  22  * written, produced, and directed by Alan Smithee
  23  *
  24  * For some documentation see:
  25  * http://wiki.multimedia.cx/index.php?title=Indeo_3
  26  */
  27
  28 #include "libavutil/imgutils.h"
  29 #include "avcodec.h"
  30 #include "dsputil.h"
  31 #include "bytestream.h"
  32
  33 #include "indeo3data.h"
  34
  35 typedef struct
  36 {
  37     uint8_t *Ybuf;
  38     uint8_t *Ubuf;
  39     uint8_t *Vbuf;
  40     unsigned short y_w, y_h;
  41     unsigned short uv_w, uv_h;
  42 } YUVBufs;
  43
  44 typedef struct Indeo3DecodeContext {
  45     AVCodecContext *avctx;
  46     int width, height;
  47     AVFrame frame;
  48
  49     uint8_t *buf;
  50     YUVBufs iv_frame[2];
  51     YUVBufs *cur_frame;
  52     YUVBufs *ref_frame;
  53
  54     uint8_t *ModPred;
  55     uint8_t *corrector_type;
  56 } Indeo3DecodeContext;
  57
  58 static const uint8_t corrector_type_0[24] = {
  59     195, 159, 133, 115, 101,  93,  87,  77,
  60     195, 159, 133, 115, 101,  93,  87,  77,
  61     128,  79,  79,  79,  79,  79,  79,  79
  62 };
  63
  64 static const uint8_t corrector_type_2[8] = { 9, 7, 6, 8, 5, 4, 3, 2 };
  65
  66 static av_cold int build_modpred(Indeo3DecodeContext *s)
  67 {
  68     int i, j;
  69
  70     if (!(s->ModPred = av_malloc(8 * 128)))
  71         return AVERROR(ENOMEM);
  72
  73     for (i=0; i < 128; ++i) {
  74         s->ModPred[i+0*128] = i >  126 ? 254 : 2*(i + 1 - ((i + 1) % 2));
  75         s->ModPred[i+1*128] = i ==   7 ?  20 :
  76                               i == 119 ||
  77                               i == 120 ? 236 : 2*(i + 2 - ((i + 1) % 3));
  78         s->ModPred[i+2*128] = i >  125 ? 248 : 2*(i + 2 - ((i + 2) % 4));
  79         s->ModPred[i+3*128] =                  2*(i + 1 - ((i - 3) % 5));
  80         s->ModPred[i+4*128] = i ==   8 ?  20 : 2*(i + 1 - ((i - 3) % 6));
  81         s->ModPred[i+5*128] =                  2*(i + 4 - ((i + 3) % 7));
  82         s->ModPred[i+6*128] = i >  123 ? 240 : 2*(i + 4 - ((i + 4) % 8));
  83         s->ModPred[i+7*128] =                  2*(i + 5 - ((i + 4) % 9));
  84     }
  85
  86     if (!(s->corrector_type = av_malloc(24 * 256)))
  87         return AVERROR(ENOMEM);
  88
  89     for (i=0; i < 24; ++i) {
  90         for (j=0; j < 256; ++j) {
  91             s->corrector_type[i*256+j] = j < corrector_type_0[i]          ? 1 :
  92                                          j < 248 || (i == 16 && j == 248) ? 0 :
  93                                          corrector_type_2[j - 248];
  94         }
  95     }
  96
  97   return 0;
  98 }
  99
 100 static av_cold int iv_alloc_frames(Indeo3DecodeContext *s)
 101 {
 102     int luma_width    = (s->width           + 3) & ~3,
 103         luma_height   = (s->height          + 3) & ~3,
 104         chroma_width  = ((luma_width  >> 2) + 3) & ~3,
 105         chroma_height = ((luma_height >> 2) + 3) & ~3,
 106         luma_pixels   = luma_width   * luma_height,
 107         chroma_pixels = chroma_width * chroma_height,
 108         i;
 109     unsigned int bufsize = luma_pixels * 2 + luma_width * 3 +
 110                           (chroma_pixels   + chroma_width) * 4;
 111
 112     av_freep(&s->buf);
 113     if(!(s->buf = av_malloc(bufsize)))
 114         return AVERROR(ENOMEM);
 115     s->iv_frame[0].y_w = s->iv_frame[1].y_w = luma_width;
 116     s->iv_frame[0].y_h = s->iv_frame[1].y_h = luma_height;
 117     s->iv_frame[0].uv_w = s->iv_frame[1].uv_w = chroma_width;
 118     s->iv_frame[0].uv_h = s->iv_frame[1].uv_h = chroma_height;
 119
 120     s->iv_frame[0].Ybuf = s->buf + luma_width;
 121     i = luma_pixels + luma_width * 2;
 122     s->iv_frame[1].Ybuf = s->buf + i;
 123     i += (luma_pixels + luma_width);
 124     s->iv_frame[0].Ubuf = s->buf + i;
 125     i += (chroma_pixels + chroma_width);
 126     s->iv_frame[1].Ubuf = s->buf + i;
 127     i += (chroma_pixels + chroma_width);
 128     s->iv_frame[0].Vbuf = s->buf + i;
 129     i += (chroma_pixels + chroma_width);
 130     s->iv_frame[1].Vbuf = s->buf + i;
 131
 132     for(i = 1; i <= luma_width; i++)
 133         s->iv_frame[0].Ybuf[-i] = s->iv_frame[1].Ybuf[-i] =
 134             s->iv_frame[0].Ubuf[-i] = 0x80;
 135
 136     for(i = 1; i <= chroma_width; i++) {
 137         s->iv_frame[1].Ubuf[-i] = 0x80;
 138         s->iv_frame[0].Vbuf[-i] = 0x80;
 139         s->iv_frame[1].Vbuf[-i] = 0x80;
 140         s->iv_frame[1].Vbuf[chroma_pixels+i-1] = 0x80;
 141     }
 142
 143     return 0;
 144 }
 145
 146 static av_cold void iv_free_func(Indeo3DecodeContext *s)
 147 {
 148     av_freep(&s->buf);
 149     av_freep(&s->ModPred);
 150     av_freep(&s->corrector_type);
 151 }
 152
 153 struct ustr {
 154     int xpos;
 155     int ypos;
 156     int width;
 157     int height;
 158     int split_flag;
 159     int split_direction;
 160     int usl7;
 161 };
 162
 163
 164 #define LV1_CHECK(buf1,rle_v3,lv1,lp2)  \
 165     if((lv1 & 0x80) != 0) {             \
 166         if(rle_v3 != 0)                 \
 167             rle_v3 = 0;                 \
 168         else {                          \
 169             rle_v3 = 1;                 \
 170             buf1 -= 2;                  \
 171         }                               \
 172     }                                   \
 173     lp2 = 4;
 174
 175
 176 #define RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)  \
 177     if(rle_v3 == 0) {                            \
 178         rle_v2 = *buf1;                          \
 179         rle_v1 = 1;                              \
 180         if(rle_v2 > 32) {                        \
 181             rle_v2 -= 32;                        \
 182             rle_v1 = 0;                          \
 183         }                                        \
 184         rle_v3 = 1;                              \
 185     }                                            \
 186     buf1--;
 187
 188
 189 #define LP2_CHECK(buf1,rle_v3,lp2)  \
 190     if(lp2 == 0 && rle_v3 != 0)     \
 191         rle_v3 = 0;                 \
 192     else {                          \
 193         buf1--;                     \
 194         rle_v3 = 1;                 \
 195     }
 196
 197
 198 #define RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) \
 199     rle_v2--;                                 \
 200     if(rle_v2 == 0) {                         \
 201         rle_v3 = 0;                           \
 202         buf1 += 2;                            \
 203     }                                         \
 204     lp2 = 4;
 205
 206 static void iv_Decode_Chunk(Indeo3DecodeContext *s,
 207         uint8_t *cur, uint8_t *ref, int width, int height,
 208         const uint8_t *buf1, int cb_offset, const uint8_t *hdr,
 209         const uint8_t *buf2, int min_width_160)
 210 {
 211     uint8_t bit_buf;
 212     unsigned int bit_pos, lv, lv1, lv2;
 213     int *width_tbl, width_tbl_arr[10];
 214     const signed char *ref_vectors;
 215     uint8_t *cur_frm_pos, *ref_frm_pos, *cp, *cp2;
 216     uint8_t *cur_end = cur + width*height + width;
 217     uint32_t *cur_lp, *ref_lp;
 218     const uint32_t *correction_lp[2], *correctionloworder_lp[2], *correctionhighorder_lp[2];
 219     uint8_t *correction_type_sp[2];
 220     struct ustr strip_tbl[20], *strip;
 221     int i, j, k, lp1, lp2, flag1, cmd, blks_width, blks_height, region_160_width,
 222         rle_v1, rle_v2, rle_v3;
 223     unsigned short res;
 224
 225     bit_buf = 0;
 226     ref_vectors = NULL;
 227
 228     width_tbl = width_tbl_arr + 1;
 229     i = (width < 0 ? width + 3 : width)/4;
 230     for(j = -1; j < 8; j++)
 231         width_tbl[j] = i * j;
 232
 233     strip = strip_tbl;
 234
 235     for(region_160_width = 0; region_160_width < (width - min_width_160); region_160_width += min_width_160);
 236
 237     strip->ypos = strip->xpos = 0;
 238     for(strip->width = min_width_160; width > strip->width; strip->width *= 2);
 239     strip->height = height;
 240     strip->split_direction = 0;
 241     strip->split_flag = 0;
 242     strip->usl7 = 0;
 243
 244     bit_pos = 0;
 245
 246     rle_v1 = rle_v2 = rle_v3 = 0;
 247
 248     while(strip >= strip_tbl) {
 249         if(bit_pos <= 0) {
 250             bit_pos = 8;
 251             bit_buf = *buf1++;
 252         }
 253
 254         bit_pos -= 2;
 255         cmd = (bit_buf >> bit_pos) & 0x03;
 256
 257         if(cmd == 0) {
 258             strip++;
 259             if(strip >= strip_tbl + FF_ARRAY_ELEMS(strip_tbl)) {
 260                 av_log(s->avctx, AV_LOG_WARNING, "out of range strip\n");
 261                 break;
 262             }
 263             memcpy(strip, strip-1, sizeof(*strip));
 264             strip->split_flag = 1;
 265             strip->split_direction = 0;
 266             strip->height = (strip->height > 8 ? ((strip->height+8)>>4)<<3 : 4);
 267             continue;
 268         } else if(cmd == 1) {
 269             strip++;
 270             if(strip >= strip_tbl + FF_ARRAY_ELEMS(strip_tbl)) {
 271                 av_log(s->avctx, AV_LOG_WARNING, "out of range strip\n");
 272                 break;
 273             }
 274             memcpy(strip, strip-1, sizeof(*strip));
 275             strip->split_flag = 1;
 276             strip->split_direction = 1;
 277             strip->width = (strip->width > 8 ? ((strip->width+8)>>4)<<3 : 4);
 278             continue;
 279         } else if(cmd == 2) {
 280             if(strip->usl7 == 0) {
 281                 strip->usl7 = 1;
 282                 ref_vectors = NULL;
 283                 continue;
 284             }
 285         } else if(cmd == 3) {
 286             if(strip->usl7 == 0) {
 287                 strip->usl7 = 1;
 288                 ref_vectors = (const signed char*)buf2 + (*buf1 * 2);
 289                 buf1++;
 290                 continue;
 291             }
 292         }
 293
 294         cur_frm_pos = cur + width * strip->ypos + strip->xpos;
 295
 296         if((blks_width = strip->width) < 0)
 297             blks_width += 3;
 298         blks_width >>= 2;
 299         blks_height = strip->height;
 300
 301         if(ref_vectors != NULL) {
 302             ref_frm_pos = ref + (ref_vectors[0] + strip->ypos) * width +
 303                 ref_vectors[1] + strip->xpos;
 304         } else
 305             ref_frm_pos = cur_frm_pos - width_tbl[4];
 306
 307         if(cmd == 2) {
 308             if(bit_pos <= 0) {
 309                 bit_pos = 8;
 310                 bit_buf = *buf1++;
 311             }
 312
 313             bit_pos -= 2;
 314             cmd = (bit_buf >> bit_pos) & 0x03;
 315
 316             if(cmd == 0 || ref_vectors != NULL) {
 317                 for(lp1 = 0; lp1 < blks_width; lp1++) {
 318                     for(i = 0, j = 0; i < blks_height; i++, j += width_tbl[1])
 319                         ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];
 320                     cur_frm_pos += 4;
 321                     ref_frm_pos += 4;
 322                 }
 323             } else if(cmd != 1)
 324                 return;
 325         } else {
 326             k = *buf1 >> 4;
 327             j = *buf1 & 0x0f;
 328             buf1++;
 329             lv = j + cb_offset;
 330
 331             if((lv - 8) <= 7 && (k == 0 || k == 3 || k == 10)) {
 332                 cp2 = s->ModPred + ((lv - 8) << 7);
 333                 cp = ref_frm_pos;
 334                 for(i = 0; i < blks_width << 2; i++) {
 335                     int v = *cp >> 1;
 336                     *(cp++) = cp2[v];
 337                 }
 338             }
 339
 340             if(k == 1 || k == 4) {
 341                 lv = (hdr[j] & 0xf) + cb_offset;
 342                 correction_type_sp[0] = s->corrector_type + (lv << 8);
 343                 correction_lp[0] = correction + (lv << 8);
 344                 lv = (hdr[j] >> 4) + cb_offset;
 345                 correction_lp[1] = correction + (lv << 8);
 346                 correction_type_sp[1] = s->corrector_type + (lv << 8);
 347             } else {
 348                 correctionloworder_lp[0] = correctionloworder_lp[1] = correctionloworder + (lv << 8);
 349                 correctionhighorder_lp[0] = correctionhighorder_lp[1] = correctionhighorder + (lv << 8);
 350                 correction_type_sp[0] = correction_type_sp[1] = s->corrector_type + (lv << 8);
 351                 correction_lp[0] = correction_lp[1] = correction + (lv << 8);
 352             }
 353
 354             switch(k) {
 355             case 1:
 356             case 0:                    /********** CASE 0 **********/
 357                 for( ; blks_height > 0; blks_height -= 4) {
 358                     for(lp1 = 0; lp1 < blks_width; lp1++) {
 359                         for(lp2 = 0; lp2 < 4; ) {
 360                             k = *buf1++;
 361                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2];
 362                             ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2];
 363                             if ((uint8_t *)cur_lp >= cur_end-3)
 364                                 break;
 365
 366                             switch(correction_type_sp[0][k]) {
 367                             case 0:
 368                                 *cur_lp = av_le2ne32(((av_le2ne32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
 369                                 lp2++;
 370                                 break;
 371                             case 1:
 372                                 res = ((av_le2ne16(((unsigned short *)(ref_lp))[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;
 373                                 ((unsigned short *)cur_lp)[0] = av_le2ne16(res);
 374                                 res = ((av_le2ne16(((unsigned short *)(ref_lp))[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
 375                                 ((unsigned short *)cur_lp)[1] = av_le2ne16(res);
 376                                 buf1++;
 377                                 lp2++;
 378                                 break;
 379                             case 2:
 380                                 if(lp2 == 0) {
 381                                     for(i = 0, j = 0; i < 2; i++, j += width_tbl[1])
 382                                         cur_lp[j] = ref_lp[j];
 383                                     lp2 += 2;
 384                                 }
 385                                 break;
 386                             case 3:
 387                                 if(lp2 < 2) {
 388                                     for(i = 0, j = 0; i < (3 - lp2); i++, j += width_tbl[1])
 389                                         cur_lp[j] = ref_lp[j];
 390                                     lp2 = 3;
 391                                 }
 392                                 break;
 393                             case 8:
 394                                 if(lp2 == 0) {
 395                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
 396
 397                                     if(rle_v1 == 1 || ref_vectors != NULL) {
 398                                         for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 399                                             cur_lp[j] = ref_lp[j];
 400                                     }
 401
 402                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
 403                                     break;
 404                                 } else {
 405                                     rle_v1 = 1;
 406                                     rle_v2 = *buf1 - 1;
 407                                 }
 408                             case 5:
 409                                 LP2_CHECK(buf1,rle_v3,lp2)
 410                             case 4:
 411                                 for(i = 0, j = 0; i < (4 - lp2); i++, j += width_tbl[1])
 412                                     cur_lp[j] = ref_lp[j];
 413                                 lp2 = 4;
 414                                 break;
 415
 416                             case 7:
 417                                 if(rle_v3 != 0)
 418                                     rle_v3 = 0;
 419                                 else {
 420                                     buf1--;
 421                                     rle_v3 = 1;
 422                                 }
 423                             case 6:
 424                                 if(ref_vectors != NULL) {
 425                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 426                                         cur_lp[j] = ref_lp[j];
 427                                 }
 428                                 lp2 = 4;
 429                                 break;
 430
 431                             case 9:
 432                                 lv1 = *buf1++;
 433                                 lv = (lv1 & 0x7F) << 1;
 434                                 lv += (lv << 8);
 435                                 lv += (lv << 16);
 436                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 437                                     cur_lp[j] = lv;
 438
 439                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
 440                                 break;
 441                             default:
 442                                 return;
 443                             }
 444                         }
 445
 446                         cur_frm_pos += 4;
 447                         ref_frm_pos += 4;
 448                     }
 449
 450                     cur_frm_pos += ((width - blks_width) * 4);
 451                     ref_frm_pos += ((width - blks_width) * 4);
 452                 }
 453                 break;
 454
 455             case 4:
 456             case 3:                    /********** CASE 3 **********/
 457                 if(ref_vectors != NULL)
 458                     return;
 459                 flag1 = 1;
 460
 461                 for( ; blks_height > 0; blks_height -= 8) {
 462                     for(lp1 = 0; lp1 < blks_width; lp1++) {
 463                         for(lp2 = 0; lp2 < 4; ) {
 464                             k = *buf1++;
 465
 466                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
 467                             ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];
 468
 469                             switch(correction_type_sp[lp2 & 0x01][k]) {
 470                             case 0:
 471                                 cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
 472                                 if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)
 473                                     cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 474                                 else
 475                                     cur_lp[0] = av_le2ne32(((av_le2ne32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
 476                                 lp2++;
 477                                 break;
 478
 479                             case 1:
 480                                 res = ((av_le2ne16(((unsigned short *)ref_lp)[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;
 481                                 ((unsigned short *)cur_lp)[width_tbl[2]] = av_le2ne16(res);
 482                                 res = ((av_le2ne16(((unsigned short *)ref_lp)[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
 483                                 ((unsigned short *)cur_lp)[width_tbl[2]+1] = av_le2ne16(res);
 484
 485                                 if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)
 486                                     cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 487                                 else
 488                                     cur_lp[0] = cur_lp[width_tbl[1]];
 489                                 buf1++;
 490                                 lp2++;
 491                                 break;
 492
 493                             case 2:
 494                                 if(lp2 == 0) {
 495                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 496                                         cur_lp[j] = *ref_lp;
 497                                     lp2 += 2;
 498                                 }
 499                                 break;
 500
 501                             case 3:
 502                                 if(lp2 < 2) {
 503                                     for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])
 504                                         cur_lp[j] = *ref_lp;
 505                                     lp2 = 3;
 506                                 }
 507                                 break;
 508
 509                             case 6:
 510                                 lp2 = 4;
 511                                 break;
 512
 513                             case 7:
 514                                 if(rle_v3 != 0)
 515                                     rle_v3 = 0;
 516                                 else {
 517                                     buf1--;
 518                                     rle_v3 = 1;
 519                                 }
 520                                 lp2 = 4;
 521                                 break;
 522
 523                             case 8:
 524                                 if(lp2 == 0) {
 525                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
 526
 527                                     if(rle_v1 == 1) {
 528                                         for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
 529                                             cur_lp[j] = ref_lp[j];
 530                                     }
 531
 532                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
 533                                     break;
 534                                 } else {
 535                                     rle_v2 = (*buf1) - 1;
 536                                     rle_v1 = 1;
 537                                 }
 538                             case 5:
 539                                 LP2_CHECK(buf1,rle_v3,lp2)
 540                             case 4:
 541                                 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])
 542                                     cur_lp[j] = *ref_lp;
 543                                 lp2 = 4;
 544                                 break;
 545
 546                             case 9:
 547                                 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
 548                                 lv1 = *buf1++;
 549                                 lv = (lv1 & 0x7F) << 1;
 550                                 lv += (lv << 8);
 551                                 lv += (lv << 16);
 552
 553                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 554                                     cur_lp[j] = lv;
 555
 556                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
 557                                 break;
 558
 559                             default:
 560                                 return;
 561                             }
 562                         }
 563
 564                         cur_frm_pos += 4;
 565                     }
 566
 567                     cur_frm_pos += (((width * 2) - blks_width) * 4);
 568                     flag1 = 0;
 569                 }
 570                 break;
 571
 572             case 10:                    /********** CASE 10 **********/
 573                 if(ref_vectors == NULL) {
 574                     flag1 = 1;
 575
 576                     for( ; blks_height > 0; blks_height -= 8) {
 577                         for(lp1 = 0; lp1 < blks_width; lp1 += 2) {
 578                             for(lp2 = 0; lp2 < 4; ) {
 579                                 k = *buf1++;
 580                                 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
 581                                 ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];
 582                                 lv1 = ref_lp[0];
 583                                 lv2 = ref_lp[1];
 584                                 if(lp2 == 0 && flag1 != 0) {
 585 #if HAVE_BIGENDIAN
 586                                     lv1 = lv1 & 0xFF00FF00;
 587                                     lv1 = (lv1 >> 8) | lv1;
 588                                     lv2 = lv2 & 0xFF00FF00;
 589                                     lv2 = (lv2 >> 8) | lv2;
 590 #else
 591                                     lv1 = lv1 & 0x00FF00FF;
 592                                     lv1 = (lv1 << 8) | lv1;
 593                                     lv2 = lv2 & 0x00FF00FF;
 594                                     lv2 = (lv2 << 8) | lv2;
 595 #endif
 596                                 }
 597
 598                                 switch(correction_type_sp[lp2 & 0x01][k]) {
 599                                 case 0:
 600                                     cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);
 601                                     cur_lp[width_tbl[1]+1] = av_le2ne32(((av_le2ne32(lv2) >> 1) + correctionhighorder_lp[lp2 & 0x01][k]) << 1);
 602                                     if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {
 603                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 604                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 605                                     } else {
 606                                         cur_lp[0] = cur_lp[width_tbl[1]];
 607                                         cur_lp[1] = cur_lp[width_tbl[1]+1];
 608                                     }
 609                                     lp2++;
 610                                     break;
 611
 612                                 case 1:
 613                                     cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][*buf1]) << 1);
 614                                     cur_lp[width_tbl[1]+1] = av_le2ne32(((av_le2ne32(lv2) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);
 615                                     if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {
 616                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 617                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 618                                     } else {
 619                                         cur_lp[0] = cur_lp[width_tbl[1]];
 620                                         cur_lp[1] = cur_lp[width_tbl[1]+1];
 621                                     }
 622                                     buf1++;
 623                                     lp2++;
 624                                     break;
 625
 626                                 case 2:
 627                                     if(lp2 == 0) {
 628                                         if(flag1 != 0) {
 629                                             for(i = 0, j = width_tbl[1]; i < 3; i++, j += width_tbl[1]) {
 630                                                 cur_lp[j] = lv1;
 631                                                 cur_lp[j+1] = lv2;
 632                                             }
 633                                             cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 634                                             cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 635                                         } else {
 636                                             for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {
 637                                                 cur_lp[j] = lv1;
 638                                                 cur_lp[j+1] = lv2;
 639                                             }
 640                                         }
 641                                         lp2 += 2;
 642                                     }
 643                                     break;
 644
 645                                 case 3:
 646                                     if(lp2 < 2) {
 647                                         if(lp2 == 0 && flag1 != 0) {
 648                                             for(i = 0, j = width_tbl[1]; i < 5; i++, j += width_tbl[1]) {
 649                                                 cur_lp[j] = lv1;
 650                                                 cur_lp[j+1] = lv2;
 651                                             }
 652                                             cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 653                                             cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 654                                         } else {
 655                                             for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {
 656                                                 cur_lp[j] = lv1;
 657                                                 cur_lp[j+1] = lv2;
 658                                             }
 659                                         }
 660                                         lp2 = 3;
 661                                     }
 662                                     break;
 663
 664                                 case 8:
 665                                     if(lp2 == 0) {
 666                                         RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
 667                                         if(rle_v1 == 1) {
 668                                             if(flag1 != 0) {
 669                                                 for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {
 670                                                     cur_lp[j] = lv1;
 671                                                     cur_lp[j+1] = lv2;
 672                                                 }
 673                                                 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 674                                                 cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 675                                             } else {
 676                                                 for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {
 677                                                     cur_lp[j] = lv1;
 678                                                     cur_lp[j+1] = lv2;
 679                                                 }
 680                                             }
 681                                         }
 682                                         RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
 683                                         break;
 684                                     } else {
 685                                         rle_v1 = 1;
 686                                         rle_v2 = (*buf1) - 1;
 687                                     }
 688                                 case 5:
 689                                     LP2_CHECK(buf1,rle_v3,lp2)
 690                                 case 4:
 691                                     if(lp2 == 0 && flag1 != 0) {
 692                                         for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {
 693                                             cur_lp[j] = lv1;
 694                                             cur_lp[j+1] = lv2;
 695                                         }
 696                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
 697                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
 698                                     } else {
 699                                         for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {
 700                                             cur_lp[j] = lv1;
 701                                             cur_lp[j+1] = lv2;
 702                                         }
 703                                     }
 704                                     lp2 = 4;
 705                                     break;
 706
 707                                 case 6:
 708                                     lp2 = 4;
 709                                     break;
 710
 711                                 case 7:
 712                                     if(lp2 == 0) {
 713                                         if(rle_v3 != 0)
 714                                             rle_v3 = 0;
 715                                         else {
 716                                             buf1--;
 717                                             rle_v3 = 1;
 718                                         }
 719                                         lp2 = 4;
 720                                     }
 721                                     break;
 722
 723                                 case 9:
 724                                     av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
 725                                     lv1 = *buf1;
 726                                     lv = (lv1 & 0x7F) << 1;
 727                                     lv += (lv << 8);
 728                                     lv += (lv << 16);
 729                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
 730                                         cur_lp[j] = lv;
 731                                     LV1_CHECK(buf1,rle_v3,lv1,lp2)
 732                                     break;
 733
 734                                 default:
 735                                     return;
 736                                 }
 737                             }
 738
 739                             cur_frm_pos += 8;
 740                         }
 741
 742                         cur_frm_pos += (((width * 2) - blks_width) * 4);
 743                         flag1 = 0;
 744                     }
 745                 } else {
 746                     for( ; blks_height > 0; blks_height -= 8) {
 747                         for(lp1 = 0; lp1 < blks_width; lp1 += 2) {
 748                             for(lp2 = 0; lp2 < 4; ) {
 749                                 k = *buf1++;
 750                                 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
 751                                 ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];
 752
 753                                 switch(correction_type_sp[lp2 & 0x01][k]) {
 754                                 case 0:
 755                                     lv1 = correctionloworder_lp[lp2 & 0x01][k];
 756                                     lv2 = correctionhighorder_lp[lp2 & 0x01][k];
 757                                     cur_lp[0] = av_le2ne32(((av_le2ne32(ref_lp[0]) >> 1) + lv1) << 1);
 758                                     cur_lp[1] = av_le2ne32(((av_le2ne32(ref_lp[1]) >> 1) + lv2) << 1);
 759                                     cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);
 760                                     cur_lp[width_tbl[1]+1] = av_le2ne32(((av_le2ne32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);
 761                                     lp2++;
 762                                     break;
 763
 764                                 case 1:
 765                                     lv1 = correctionloworder_lp[lp2 & 0x01][*buf1++];
 766                                     lv2 = correctionloworder_lp[lp2 & 0x01][k];
 767                                     cur_lp[0] = av_le2ne32(((av_le2ne32(ref_lp[0]) >> 1) + lv1) << 1);
 768                                     cur_lp[1] = av_le2ne32(((av_le2ne32(ref_lp[1]) >> 1) + lv2) << 1);
 769                                     cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);
 770                                     cur_lp[width_tbl[1]+1] = av_le2ne32(((av_le2ne32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);
 771                                     lp2++;
 772                                     break;
 773
 774                                 case 2:
 775                                     if(lp2 == 0) {
 776                                         for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {
 777                                             cur_lp[j] = ref_lp[j];
 778                                             cur_lp[j+1] = ref_lp[j+1];
 779                                         }
 780                                         lp2 += 2;
 781                                     }
 782                                     break;
 783
 784                                 case 3:
 785                                     if(lp2 < 2) {
 786                                         for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {
 787                                             cur_lp[j] = ref_lp[j];
 788                                             cur_lp[j+1] = ref_lp[j+1];
 789                                         }
 790                                         lp2 = 3;
 791                                     }
 792                                     break;
 793
 794                                 case 8:
 795                                     if(lp2 == 0) {
 796                                         RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
 797                                         for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {
 798                                             ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];
 799                                             ((uint32_t *)cur_frm_pos)[j+1] = ((uint32_t *)ref_frm_pos)[j+1];
 800                                         }
 801                                         RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
 802                                         break;
 803                                     } else {
 804                                         rle_v1 = 1;
 805                                         rle_v2 = (*buf1) - 1;
 806                                     }
 807                                 case 5:
 808                                 case 7:
 809                                     LP2_CHECK(buf1,rle_v3,lp2)
 810                                 case 6:
 811                                 case 4:
 812                                     for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {
 813                                         cur_lp[j] = ref_lp[j];
 814                                         cur_lp[j+1] = ref_lp[j+1];
 815                                     }
 816                                     lp2 = 4;
 817                                     break;
 818
 819                                 case 9:
 820                                     av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
 821                                     lv1 = *buf1;
 822                                     lv = (lv1 & 0x7F) << 1;
 823                                     lv += (lv << 8);
 824                                     lv += (lv << 16);
 825                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
 826                                         ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)cur_frm_pos)[j+1] = lv;
 827                                     LV1_CHECK(buf1,rle_v3,lv1,lp2)
 828                                     break;
 829
 830                                 default:
 831                                     return;
 832                                 }
 833                             }
 834
 835                             cur_frm_pos += 8;
 836                             ref_frm_pos += 8;
 837                         }
 838
 839                         cur_frm_pos += (((width * 2) - blks_width) * 4);
 840                         ref_frm_pos += (((width * 2) - blks_width) * 4);
 841                     }
 842                 }
 843                 break;
 844
 845             case 11:                    /********** CASE 11 **********/
 846                 if(ref_vectors == NULL)
 847                     return;
 848
 849                 for( ; blks_height > 0; blks_height -= 8) {
 850                     for(lp1 = 0; lp1 < blks_width; lp1++) {
 851                         for(lp2 = 0; lp2 < 4; ) {
 852                             k = *buf1++;
 853                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
 854                             ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];
 855
 856                             switch(correction_type_sp[lp2 & 0x01][k]) {
 857                             case 0:
 858                                 cur_lp[0] = av_le2ne32(((av_le2ne32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
 859                                 cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(ref_lp[width_tbl[1]]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
 860                                 lp2++;
 861                                 break;
 862
 863                             case 1:
 864                                 lv1 = (unsigned short)(correction_lp[lp2 & 0x01][*buf1++]);
 865                                 lv2 = (unsigned short)(correction_lp[lp2 & 0x01][k]);
 866                                 res = (unsigned short)(((av_le2ne16(((unsigned short *)ref_lp)[0]) >> 1) + lv1) << 1);
 867                                 ((unsigned short *)cur_lp)[0] = av_le2ne16(res);
 868                                 res = (unsigned short)(((av_le2ne16(((unsigned short *)ref_lp)[1]) >> 1) + lv2) << 1);
 869                                 ((unsigned short *)cur_lp)[1] = av_le2ne16(res);
 870                                 res = (unsigned short)(((av_le2ne16(((unsigned short *)ref_lp)[width_tbl[2]]) >> 1) + lv1) << 1);
 871                                 ((unsigned short *)cur_lp)[width_tbl[2]] = av_le2ne16(res);
 872                                 res = (unsigned short)(((av_le2ne16(((unsigned short *)ref_lp)[width_tbl[2]+1]) >> 1) + lv2) << 1);
 873                                 ((unsigned short *)cur_lp)[width_tbl[2]+1] = av_le2ne16(res);
 874                                 lp2++;
 875                                 break;
 876
 877                             case 2:
 878                                 if(lp2 == 0) {
 879                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 880                                         cur_lp[j] = ref_lp[j];
 881                                     lp2 += 2;
 882                                 }
 883                                 break;
 884
 885                             case 3:
 886                                 if(lp2 < 2) {
 887                                     for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])
 888                                         cur_lp[j] = ref_lp[j];
 889                                     lp2 = 3;
 890                                 }
 891                                 break;
 892
 893                             case 8:
 894                                 if(lp2 == 0) {
 895                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
 896
 897                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
 898                                         cur_lp[j] = ref_lp[j];
 899
 900                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
 901                                     break;
 902                                 } else {
 903                                     rle_v1 = 1;
 904                                     rle_v2 = (*buf1) - 1;
 905                                 }
 906                             case 5:
 907                             case 7:
 908                                 LP2_CHECK(buf1,rle_v3,lp2)
 909                             case 4:
 910                             case 6:
 911                                 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])
 912                                     cur_lp[j] = ref_lp[j];
 913                                 lp2 = 4;
 914                                 break;
 915
 916                             case 9:
 917                                 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
 918                                 lv1 = *buf1++;
 919                                 lv = (lv1 & 0x7F) << 1;
 920                                 lv += (lv << 8);
 921                                 lv += (lv << 16);
 922                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
 923                                     cur_lp[j] = lv;
 924                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
 925                                 break;
 926
 927                             default:
 928                                 return;
 929                             }
 930                         }
 931
 932                         cur_frm_pos += 4;
 933                         ref_frm_pos += 4;
 934                     }
 935
 936                     cur_frm_pos += (((width * 2) - blks_width) * 4);
 937                     ref_frm_pos += (((width * 2) - blks_width) * 4);
 938                 }
 939                 break;
 940
 941             default:
 942                 return;
 943             }
 944         }
 945
 946         for( ; strip >= strip_tbl; strip--) {
 947             if(strip->split_flag != 0) {
 948                 strip->split_flag = 0;
 949                 strip->usl7 = (strip-1)->usl7;
 950
 951                 if(strip->split_direction) {
 952                     strip->xpos += strip->width;
 953                     strip->width = (strip-1)->width - strip->width;
 954                     if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)
 955                         strip->width = width - strip->xpos;
 956                 } else {
 957                     strip->ypos += strip->height;
 958                     strip->height = (strip-1)->height - strip->height;
 959                 }
 960                 break;
 961             }
 962         }
 963     }
 964 }
 965
 966 static av_cold int indeo3_decode_init(AVCodecContext *avctx)
 967 {
 968     Indeo3DecodeContext *s = avctx->priv_data;
 969     int ret = 0;
 970
 971     s->avctx = avctx;
 972     s->width = avctx->width;
 973     s->height = avctx->height;
 974     avctx->pix_fmt = PIX_FMT_YUV410P;
 975     avcodec_get_frame_defaults(&s->frame);
 976
 977     if (!(ret = build_modpred(s)))
 978         ret = iv_alloc_frames(s);
 979     if (ret)
 980         iv_free_func(s);
 981
 982     return ret;
 983 }
 984
 985 static int iv_decode_frame(AVCodecContext *avctx,
 986                            const uint8_t *buf, int buf_size)
 987 {
 988     Indeo3DecodeContext *s = avctx->priv_data;
 989     unsigned int image_width, image_height,
 990                  chroma_width, chroma_height;
 991     unsigned int flags, cb_offset, data_size,
 992                   y_offset, v_offset, u_offset, mc_vector_count;
 993     const uint8_t *hdr_pos, *buf_pos;
 994
 995     buf_pos = buf;
 996     buf_pos += 18; /* skip OS header (16 bytes) and version number */
 997
 998     flags = bytestream_get_le16(&buf_pos);
 999     data_size = bytestream_get_le32(&buf_pos);
1000     cb_offset = *buf_pos++;
1001     buf_pos += 3; /* skip reserved byte and checksum */
1002     image_height = bytestream_get_le16(&buf_pos);
1003     image_width  = bytestream_get_le16(&buf_pos);
1004
1005     if(av_image_check_size(image_width, image_height, 0, avctx))
1006         return -1;
1007     if (image_width != avctx->width || image_height != avctx->height) {
1008         int ret;
1009         avcodec_set_dimensions(avctx, image_width, image_height);
1010         s->width  = avctx->width;
1011         s->height = avctx->height;
1012         ret = iv_alloc_frames(s);
1013         if (ret < 0) {
1014             s->width = s->height = 0;
1015             return ret;
1016         }
1017     }
1018
1019     chroma_height = ((image_height >> 2) + 3) & 0x7ffc;
1020     chroma_width = ((image_width >> 2) + 3) & 0x7ffc;
1021     y_offset = bytestream_get_le32(&buf_pos);
1022     v_offset = bytestream_get_le32(&buf_pos);
1023     u_offset = bytestream_get_le32(&buf_pos);
1024     buf_pos += 4; /* reserved */
1025     hdr_pos = buf_pos;
1026     if(data_size == 0x80) return 4;
1027
1028     if(FFMAX3(y_offset, v_offset, u_offset) >= buf_size-16) {
1029         av_log(s->avctx, AV_LOG_ERROR, "y/u/v offset outside buffer\n");
1030         return -1;
1031     }
1032
1033     if(flags & 0x200) {
1034         s->cur_frame = s->iv_frame + 1;
1035         s->ref_frame = s->iv_frame;
1036     } else {
1037         s->cur_frame = s->iv_frame;
1038         s->ref_frame = s->iv_frame + 1;
1039     }
1040
1041     buf_pos = buf + 16 + y_offset;
1042     mc_vector_count = bytestream_get_le32(&buf_pos);
1043     if(2LL*mc_vector_count >= buf_size-16-y_offset) {
1044         av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
1045         return -1;
1046     }
1047
1048     iv_Decode_Chunk(s, s->cur_frame->Ybuf, s->ref_frame->Ybuf, image_width,
1049                     image_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
1050                     FFMIN(image_width, 160));
1051
1052     if (!(s->avctx->flags & CODEC_FLAG_GRAY))
1053     {
1054
1055         buf_pos = buf + 16 + v_offset;
1056         mc_vector_count = bytestream_get_le32(&buf_pos);
1057         if(2LL*mc_vector_count >= buf_size-16-v_offset) {
1058             av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
1059             return -1;
1060         }
1061
1062         iv_Decode_Chunk(s, s->cur_frame->Vbuf, s->ref_frame->Vbuf, chroma_width,
1063                 chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
1064                 FFMIN(chroma_width, 40));
1065
1066         buf_pos = buf + 16 + u_offset;
1067         mc_vector_count = bytestream_get_le32(&buf_pos);
1068         if(2LL*mc_vector_count >= buf_size-16-u_offset) {
1069             av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
1070             return -1;
1071         }
1072
1073         iv_Decode_Chunk(s, s->cur_frame->Ubuf, s->ref_frame->Ubuf, chroma_width,
1074                 chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
1075                 FFMIN(chroma_width, 40));
1076
1077     }
1078
1079     return 8;
1080 }
1081
1082 static int indeo3_decode_frame(AVCodecContext *avctx,
1083                                void *data, int *data_size,
1084                                AVPacket *avpkt)
1085 {
1086     const uint8_t *buf = avpkt->data;
1087     int buf_size = avpkt->size;
1088     Indeo3DecodeContext *s=avctx->priv_data;
1089     uint8_t *src, *dest;
1090     int y;
1091
1092     if (iv_decode_frame(avctx, buf, buf_size) < 0)
1093         return -1;
1094
1095     if(s->frame.data[0])
1096         avctx->release_buffer(avctx, &s->frame);
1097
1098     s->frame.reference = 0;
1099     if(avctx->get_buffer(avctx, &s->frame) < 0) {
1100         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1101         return -1;
1102     }
1103
1104     src = s->cur_frame->Ybuf;
1105     dest = s->frame.data[0];
1106     for (y = 0; y < s->height; y++) {
1107         memcpy(dest, src, s->cur_frame->y_w);
1108         src += s->cur_frame->y_w;
1109         dest += s->frame.linesize[0];
1110     }
1111
1112     if (!(s->avctx->flags & CODEC_FLAG_GRAY))
1113     {
1114         src = s->cur_frame->Ubuf;
1115         dest = s->frame.data[1];
1116         for (y = 0; y < s->height / 4; y++) {
1117             memcpy(dest, src, s->cur_frame->uv_w);
1118             src += s->cur_frame->uv_w;
1119             dest += s->frame.linesize[1];
1120         }
1121
1122         src = s->cur_frame->Vbuf;
1123         dest = s->frame.data[2];
1124         for (y = 0; y < s->height / 4; y++) {
1125             memcpy(dest, src, s->cur_frame->uv_w);
1126             src += s->cur_frame->uv_w;
1127             dest += s->frame.linesize[2];
1128         }
1129     }
1130
1131     *data_size=sizeof(AVFrame);
1132     *(AVFrame*)data= s->frame;
1133
1134     return buf_size;
1135 }
1136
1137 static av_cold int indeo3_decode_end(AVCodecContext *avctx)
1138 {
1139     Indeo3DecodeContext *s = avctx->priv_data;
1140
1141     iv_free_func(s);
1142
1143     if (s->frame.data[0])
1144         avctx->release_buffer(avctx, &s->frame);
1145
1146     return 0;
1147 }
1148
1149 AVCodec ff_indeo3_decoder = {
1150     .name           = "indeo3",
1151     .type           = AVMEDIA_TYPE_VIDEO,
1152     .id             = CODEC_ID_INDEO3,
1153     .priv_data_size = sizeof(Indeo3DecodeContext),
1154     .init           = indeo3_decode_init,
1155     .close          = indeo3_decode_end,
1156     .decode         = indeo3_decode_frame,
1157     .capabilities   = CODEC_CAP_DR1,
1158     .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),
1159 };