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