Libav 0.7.1
libavcodec/indeo3.c
Go to the documentation of this file.
00001 /*
00002  * Intel Indeo 3 (IV31, IV32, etc.) video decoder for ffmpeg
00003  * written, produced, and directed by Alan Smithee
00004  *
00005  * This file is part of Libav.
00006  *
00007  * Libav is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * Libav is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with Libav; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #include <stdio.h>
00023 #include <stdlib.h>
00024 #include <string.h>
00025 
00026 #include "libavutil/imgutils.h"
00027 #include "avcodec.h"
00028 #include "dsputil.h"
00029 #include "bytestream.h"
00030 
00031 #include "indeo3data.h"
00032 
00033 typedef struct
00034 {
00035     uint8_t *Ybuf;
00036     uint8_t *Ubuf;
00037     uint8_t *Vbuf;
00038     unsigned short y_w, y_h;
00039     unsigned short uv_w, uv_h;
00040 } YUVBufs;
00041 
00042 typedef struct Indeo3DecodeContext {
00043     AVCodecContext *avctx;
00044     int width, height;
00045     AVFrame frame;
00046 
00047     uint8_t *buf;
00048     YUVBufs iv_frame[2];
00049     YUVBufs *cur_frame;
00050     YUVBufs *ref_frame;
00051 
00052     uint8_t *ModPred;
00053     uint8_t *corrector_type;
00054 } Indeo3DecodeContext;
00055 
00056 static const uint8_t corrector_type_0[24] = {
00057     195, 159, 133, 115, 101,  93,  87,  77,
00058     195, 159, 133, 115, 101,  93,  87,  77,
00059     128,  79,  79,  79,  79,  79,  79,  79
00060 };
00061 
00062 static const uint8_t corrector_type_2[8] = { 9, 7, 6, 8, 5, 4, 3, 2 };
00063 
00064 static av_cold int build_modpred(Indeo3DecodeContext *s)
00065 {
00066     int i, j;
00067 
00068     if (!(s->ModPred = av_malloc(8 * 128)))
00069         return AVERROR(ENOMEM);
00070 
00071     for (i=0; i < 128; ++i) {
00072         s->ModPred[i+0*128] = i >  126 ? 254 : 2*(i + 1 - ((i + 1) % 2));
00073         s->ModPred[i+1*128] = i ==   7 ?  20 :
00074                               i == 119 ||
00075                               i == 120 ? 236 : 2*(i + 2 - ((i + 1) % 3));
00076         s->ModPred[i+2*128] = i >  125 ? 248 : 2*(i + 2 - ((i + 2) % 4));
00077         s->ModPred[i+3*128] =                  2*(i + 1 - ((i - 3) % 5));
00078         s->ModPred[i+4*128] = i ==   8 ?  20 : 2*(i + 1 - ((i - 3) % 6));
00079         s->ModPred[i+5*128] =                  2*(i + 4 - ((i + 3) % 7));
00080         s->ModPred[i+6*128] = i >  123 ? 240 : 2*(i + 4 - ((i + 4) % 8));
00081         s->ModPred[i+7*128] =                  2*(i + 5 - ((i + 4) % 9));
00082     }
00083 
00084     if (!(s->corrector_type = av_malloc(24 * 256)))
00085         return AVERROR(ENOMEM);
00086 
00087     for (i=0; i < 24; ++i) {
00088         for (j=0; j < 256; ++j) {
00089             s->corrector_type[i*256+j] = j < corrector_type_0[i]          ? 1 :
00090                                          j < 248 || (i == 16 && j == 248) ? 0 :
00091                                          corrector_type_2[j - 248];
00092         }
00093     }
00094 
00095   return 0;
00096 }
00097 
00098 static av_cold int iv_alloc_frames(Indeo3DecodeContext *s)
00099 {
00100     int luma_width    = (s->width           + 3) & ~3,
00101         luma_height   = (s->height          + 3) & ~3,
00102         chroma_width  = ((luma_width  >> 2) + 3) & ~3,
00103         chroma_height = ((luma_height >> 2) + 3) & ~3,
00104         luma_pixels   = luma_width   * luma_height,
00105         chroma_pixels = chroma_width * chroma_height,
00106         i;
00107     unsigned int bufsize = luma_pixels * 2 + luma_width * 3 +
00108                           (chroma_pixels   + chroma_width) * 4;
00109 
00110     av_freep(&s->buf);
00111     if(!(s->buf = av_malloc(bufsize)))
00112         return AVERROR(ENOMEM);
00113     s->iv_frame[0].y_w = s->iv_frame[1].y_w = luma_width;
00114     s->iv_frame[0].y_h = s->iv_frame[1].y_h = luma_height;
00115     s->iv_frame[0].uv_w = s->iv_frame[1].uv_w = chroma_width;
00116     s->iv_frame[0].uv_h = s->iv_frame[1].uv_h = chroma_height;
00117 
00118     s->iv_frame[0].Ybuf = s->buf + luma_width;
00119     i = luma_pixels + luma_width * 2;
00120     s->iv_frame[1].Ybuf = s->buf + i;
00121     i += (luma_pixels + luma_width);
00122     s->iv_frame[0].Ubuf = s->buf + i;
00123     i += (chroma_pixels + chroma_width);
00124     s->iv_frame[1].Ubuf = s->buf + i;
00125     i += (chroma_pixels + chroma_width);
00126     s->iv_frame[0].Vbuf = s->buf + i;
00127     i += (chroma_pixels + chroma_width);
00128     s->iv_frame[1].Vbuf = s->buf + i;
00129 
00130     for(i = 1; i <= luma_width; i++)
00131         s->iv_frame[0].Ybuf[-i] = s->iv_frame[1].Ybuf[-i] =
00132             s->iv_frame[0].Ubuf[-i] = 0x80;
00133 
00134     for(i = 1; i <= chroma_width; i++) {
00135         s->iv_frame[1].Ubuf[-i] = 0x80;
00136         s->iv_frame[0].Vbuf[-i] = 0x80;
00137         s->iv_frame[1].Vbuf[-i] = 0x80;
00138         s->iv_frame[1].Vbuf[chroma_pixels+i-1] = 0x80;
00139     }
00140 
00141     return 0;
00142 }
00143 
00144 static av_cold void iv_free_func(Indeo3DecodeContext *s)
00145 {
00146     av_freep(&s->buf);
00147     av_freep(&s->ModPred);
00148     av_freep(&s->corrector_type);
00149 }
00150 
00151 struct ustr {
00152     int xpos;
00153     int ypos;
00154     int width;
00155     int height;
00156     int split_flag;
00157     int split_direction;
00158     int usl7;
00159 };
00160 
00161 
00162 #define LV1_CHECK(buf1,rle_v3,lv1,lp2)  \
00163     if((lv1 & 0x80) != 0) {             \
00164         if(rle_v3 != 0)                 \
00165             rle_v3 = 0;                 \
00166         else {                          \
00167             rle_v3 = 1;                 \
00168             buf1 -= 2;                  \
00169         }                               \
00170     }                                   \
00171     lp2 = 4;
00172 
00173 
00174 #define RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)  \
00175     if(rle_v3 == 0) {                            \
00176         rle_v2 = *buf1;                          \
00177         rle_v1 = 1;                              \
00178         if(rle_v2 > 32) {                        \
00179             rle_v2 -= 32;                        \
00180             rle_v1 = 0;                          \
00181         }                                        \
00182         rle_v3 = 1;                              \
00183     }                                            \
00184     buf1--;
00185 
00186 
00187 #define LP2_CHECK(buf1,rle_v3,lp2)  \
00188     if(lp2 == 0 && rle_v3 != 0)     \
00189         rle_v3 = 0;                 \
00190     else {                          \
00191         buf1--;                     \
00192         rle_v3 = 1;                 \
00193     }
00194 
00195 
00196 #define RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) \
00197     rle_v2--;                                 \
00198     if(rle_v2 == 0) {                         \
00199         rle_v3 = 0;                           \
00200         buf1 += 2;                            \
00201     }                                         \
00202     lp2 = 4;
00203 
00204 static void iv_Decode_Chunk(Indeo3DecodeContext *s,
00205         uint8_t *cur, uint8_t *ref, int width, int height,
00206         const uint8_t *buf1, int cb_offset, const uint8_t *hdr,
00207         const uint8_t *buf2, int min_width_160)
00208 {
00209     uint8_t bit_buf;
00210     unsigned int bit_pos, lv, lv1, lv2;
00211     int *width_tbl, width_tbl_arr[10];
00212     const signed char *ref_vectors;
00213     uint8_t *cur_frm_pos, *ref_frm_pos, *cp, *cp2;
00214     uint32_t *cur_lp, *ref_lp;
00215     const uint32_t *correction_lp[2], *correctionloworder_lp[2], *correctionhighorder_lp[2];
00216     uint8_t *correction_type_sp[2];
00217     struct ustr strip_tbl[20], *strip;
00218     int i, j, k, lp1, lp2, flag1, cmd, blks_width, blks_height, region_160_width,
00219         rle_v1, rle_v2, rle_v3;
00220     unsigned short res;
00221 
00222     bit_buf = 0;
00223     ref_vectors = NULL;
00224 
00225     width_tbl = width_tbl_arr + 1;
00226     i = (width < 0 ? width + 3 : width)/4;
00227     for(j = -1; j < 8; j++)
00228         width_tbl[j] = i * j;
00229 
00230     strip = strip_tbl;
00231 
00232     for(region_160_width = 0; region_160_width < (width - min_width_160); region_160_width += min_width_160);
00233 
00234     strip->ypos = strip->xpos = 0;
00235     for(strip->width = min_width_160; width > strip->width; strip->width *= 2);
00236     strip->height = height;
00237     strip->split_direction = 0;
00238     strip->split_flag = 0;
00239     strip->usl7 = 0;
00240 
00241     bit_pos = 0;
00242 
00243     rle_v1 = rle_v2 = rle_v3 = 0;
00244 
00245     while(strip >= strip_tbl) {
00246         if(bit_pos <= 0) {
00247             bit_pos = 8;
00248             bit_buf = *buf1++;
00249         }
00250 
00251         bit_pos -= 2;
00252         cmd = (bit_buf >> bit_pos) & 0x03;
00253 
00254         if(cmd == 0) {
00255             strip++;
00256             if(strip >= strip_tbl + FF_ARRAY_ELEMS(strip_tbl)) {
00257                 av_log(s->avctx, AV_LOG_WARNING, "out of range strip\n");
00258                 break;
00259             }
00260             memcpy(strip, strip-1, sizeof(*strip));
00261             strip->split_flag = 1;
00262             strip->split_direction = 0;
00263             strip->height = (strip->height > 8 ? ((strip->height+8)>>4)<<3 : 4);
00264             continue;
00265         } else if(cmd == 1) {
00266             strip++;
00267             if(strip >= strip_tbl + FF_ARRAY_ELEMS(strip_tbl)) {
00268                 av_log(s->avctx, AV_LOG_WARNING, "out of range strip\n");
00269                 break;
00270             }
00271             memcpy(strip, strip-1, sizeof(*strip));
00272             strip->split_flag = 1;
00273             strip->split_direction = 1;
00274             strip->width = (strip->width > 8 ? ((strip->width+8)>>4)<<3 : 4);
00275             continue;
00276         } else if(cmd == 2) {
00277             if(strip->usl7 == 0) {
00278                 strip->usl7 = 1;
00279                 ref_vectors = NULL;
00280                 continue;
00281             }
00282         } else if(cmd == 3) {
00283             if(strip->usl7 == 0) {
00284                 strip->usl7 = 1;
00285                 ref_vectors = (const signed char*)buf2 + (*buf1 * 2);
00286                 buf1++;
00287                 continue;
00288             }
00289         }
00290 
00291         cur_frm_pos = cur + width * strip->ypos + strip->xpos;
00292 
00293         if((blks_width = strip->width) < 0)
00294             blks_width += 3;
00295         blks_width >>= 2;
00296         blks_height = strip->height;
00297 
00298         if(ref_vectors != NULL) {
00299             ref_frm_pos = ref + (ref_vectors[0] + strip->ypos) * width +
00300                 ref_vectors[1] + strip->xpos;
00301         } else
00302             ref_frm_pos = cur_frm_pos - width_tbl[4];
00303 
00304         if(cmd == 2) {
00305             if(bit_pos <= 0) {
00306                 bit_pos = 8;
00307                 bit_buf = *buf1++;
00308             }
00309 
00310             bit_pos -= 2;
00311             cmd = (bit_buf >> bit_pos) & 0x03;
00312 
00313             if(cmd == 0 || ref_vectors != NULL) {
00314                 for(lp1 = 0; lp1 < blks_width; lp1++) {
00315                     for(i = 0, j = 0; i < blks_height; i++, j += width_tbl[1])
00316                         ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];
00317                     cur_frm_pos += 4;
00318                     ref_frm_pos += 4;
00319                 }
00320             } else if(cmd != 1)
00321                 return;
00322         } else {
00323             k = *buf1 >> 4;
00324             j = *buf1 & 0x0f;
00325             buf1++;
00326             lv = j + cb_offset;
00327 
00328             if((lv - 8) <= 7 && (k == 0 || k == 3 || k == 10)) {
00329                 cp2 = s->ModPred + ((lv - 8) << 7);
00330                 cp = ref_frm_pos;
00331                 for(i = 0; i < blks_width << 2; i++) {
00332                     int v = *cp >> 1;
00333                     *(cp++) = cp2[v];
00334                 }
00335             }
00336 
00337             if(k == 1 || k == 4) {
00338                 lv = (hdr[j] & 0xf) + cb_offset;
00339                 correction_type_sp[0] = s->corrector_type + (lv << 8);
00340                 correction_lp[0] = correction + (lv << 8);
00341                 lv = (hdr[j] >> 4) + cb_offset;
00342                 correction_lp[1] = correction + (lv << 8);
00343                 correction_type_sp[1] = s->corrector_type + (lv << 8);
00344             } else {
00345                 correctionloworder_lp[0] = correctionloworder_lp[1] = correctionloworder + (lv << 8);
00346                 correctionhighorder_lp[0] = correctionhighorder_lp[1] = correctionhighorder + (lv << 8);
00347                 correction_type_sp[0] = correction_type_sp[1] = s->corrector_type + (lv << 8);
00348                 correction_lp[0] = correction_lp[1] = correction + (lv << 8);
00349             }
00350 
00351             switch(k) {
00352             case 1:
00353             case 0:                    /********** CASE 0 **********/
00354                 for( ; blks_height > 0; blks_height -= 4) {
00355                     for(lp1 = 0; lp1 < blks_width; lp1++) {
00356                         for(lp2 = 0; lp2 < 4; ) {
00357                             k = *buf1++;
00358                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2];
00359                             ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2];
00360 
00361                             switch(correction_type_sp[0][k]) {
00362                             case 0:
00363                                 *cur_lp = av_le2ne32(((av_le2ne32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
00364                                 lp2++;
00365                                 break;
00366                             case 1:
00367                                 res = ((av_le2ne16(((unsigned short *)(ref_lp))[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;
00368                                 ((unsigned short *)cur_lp)[0] = av_le2ne16(res);
00369                                 res = ((av_le2ne16(((unsigned short *)(ref_lp))[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
00370                                 ((unsigned short *)cur_lp)[1] = av_le2ne16(res);
00371                                 buf1++;
00372                                 lp2++;
00373                                 break;
00374                             case 2:
00375                                 if(lp2 == 0) {
00376                                     for(i = 0, j = 0; i < 2; i++, j += width_tbl[1])
00377                                         cur_lp[j] = ref_lp[j];
00378                                     lp2 += 2;
00379                                 }
00380                                 break;
00381                             case 3:
00382                                 if(lp2 < 2) {
00383                                     for(i = 0, j = 0; i < (3 - lp2); i++, j += width_tbl[1])
00384                                         cur_lp[j] = ref_lp[j];
00385                                     lp2 = 3;
00386                                 }
00387                                 break;
00388                             case 8:
00389                                 if(lp2 == 0) {
00390                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
00391 
00392                                     if(rle_v1 == 1 || ref_vectors != NULL) {
00393                                         for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00394                                             cur_lp[j] = ref_lp[j];
00395                                     }
00396 
00397                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
00398                                     break;
00399                                 } else {
00400                                     rle_v1 = 1;
00401                                     rle_v2 = *buf1 - 1;
00402                                 }
00403                             case 5:
00404                                 LP2_CHECK(buf1,rle_v3,lp2)
00405                             case 4:
00406                                 for(i = 0, j = 0; i < (4 - lp2); i++, j += width_tbl[1])
00407                                     cur_lp[j] = ref_lp[j];
00408                                 lp2 = 4;
00409                                 break;
00410 
00411                             case 7:
00412                                 if(rle_v3 != 0)
00413                                     rle_v3 = 0;
00414                                 else {
00415                                     buf1--;
00416                                     rle_v3 = 1;
00417                                 }
00418                             case 6:
00419                                 if(ref_vectors != NULL) {
00420                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00421                                         cur_lp[j] = ref_lp[j];
00422                                 }
00423                                 lp2 = 4;
00424                                 break;
00425 
00426                             case 9:
00427                                 lv1 = *buf1++;
00428                                 lv = (lv1 & 0x7F) << 1;
00429                                 lv += (lv << 8);
00430                                 lv += (lv << 16);
00431                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00432                                     cur_lp[j] = lv;
00433 
00434                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
00435                                 break;
00436                             default:
00437                                 return;
00438                             }
00439                         }
00440 
00441                         cur_frm_pos += 4;
00442                         ref_frm_pos += 4;
00443                     }
00444 
00445                     cur_frm_pos += ((width - blks_width) * 4);
00446                     ref_frm_pos += ((width - blks_width) * 4);
00447                 }
00448                 break;
00449 
00450             case 4:
00451             case 3:                    /********** CASE 3 **********/
00452                 if(ref_vectors != NULL)
00453                     return;
00454                 flag1 = 1;
00455 
00456                 for( ; blks_height > 0; blks_height -= 8) {
00457                     for(lp1 = 0; lp1 < blks_width; lp1++) {
00458                         for(lp2 = 0; lp2 < 4; ) {
00459                             k = *buf1++;
00460 
00461                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
00462                             ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];
00463 
00464                             switch(correction_type_sp[lp2 & 0x01][k]) {
00465                             case 0:
00466                                 cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
00467                                 if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)
00468                                     cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00469                                 else
00470                                     cur_lp[0] = av_le2ne32(((av_le2ne32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
00471                                 lp2++;
00472                                 break;
00473 
00474                             case 1:
00475                                 res = ((av_le2ne16(((unsigned short *)ref_lp)[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;
00476                                 ((unsigned short *)cur_lp)[width_tbl[2]] = av_le2ne16(res);
00477                                 res = ((av_le2ne16(((unsigned short *)ref_lp)[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
00478                                 ((unsigned short *)cur_lp)[width_tbl[2]+1] = av_le2ne16(res);
00479 
00480                                 if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)
00481                                     cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00482                                 else
00483                                     cur_lp[0] = cur_lp[width_tbl[1]];
00484                                 buf1++;
00485                                 lp2++;
00486                                 break;
00487 
00488                             case 2:
00489                                 if(lp2 == 0) {
00490                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00491                                         cur_lp[j] = *ref_lp;
00492                                     lp2 += 2;
00493                                 }
00494                                 break;
00495 
00496                             case 3:
00497                                 if(lp2 < 2) {
00498                                     for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])
00499                                         cur_lp[j] = *ref_lp;
00500                                     lp2 = 3;
00501                                 }
00502                                 break;
00503 
00504                             case 6:
00505                                 lp2 = 4;
00506                                 break;
00507 
00508                             case 7:
00509                                 if(rle_v3 != 0)
00510                                     rle_v3 = 0;
00511                                 else {
00512                                     buf1--;
00513                                     rle_v3 = 1;
00514                                 }
00515                                 lp2 = 4;
00516                                 break;
00517 
00518                             case 8:
00519                                 if(lp2 == 0) {
00520                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
00521 
00522                                     if(rle_v1 == 1) {
00523                                         for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
00524                                             cur_lp[j] = ref_lp[j];
00525                                     }
00526 
00527                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
00528                                     break;
00529                                 } else {
00530                                     rle_v2 = (*buf1) - 1;
00531                                     rle_v1 = 1;
00532                                 }
00533                             case 5:
00534                                 LP2_CHECK(buf1,rle_v3,lp2)
00535                             case 4:
00536                                 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])
00537                                     cur_lp[j] = *ref_lp;
00538                                 lp2 = 4;
00539                                 break;
00540 
00541                             case 9:
00542                                 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
00543                                 lv1 = *buf1++;
00544                                 lv = (lv1 & 0x7F) << 1;
00545                                 lv += (lv << 8);
00546                                 lv += (lv << 16);
00547 
00548                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00549                                     cur_lp[j] = lv;
00550 
00551                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
00552                                 break;
00553 
00554                             default:
00555                                 return;
00556                             }
00557                         }
00558 
00559                         cur_frm_pos += 4;
00560                     }
00561 
00562                     cur_frm_pos += (((width * 2) - blks_width) * 4);
00563                     flag1 = 0;
00564                 }
00565                 break;
00566 
00567             case 10:                    /********** CASE 10 **********/
00568                 if(ref_vectors == NULL) {
00569                     flag1 = 1;
00570 
00571                     for( ; blks_height > 0; blks_height -= 8) {
00572                         for(lp1 = 0; lp1 < blks_width; lp1 += 2) {
00573                             for(lp2 = 0; lp2 < 4; ) {
00574                                 k = *buf1++;
00575                                 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
00576                                 ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];
00577                                 lv1 = ref_lp[0];
00578                                 lv2 = ref_lp[1];
00579                                 if(lp2 == 0 && flag1 != 0) {
00580 #if HAVE_BIGENDIAN
00581                                     lv1 = lv1 & 0xFF00FF00;
00582                                     lv1 = (lv1 >> 8) | lv1;
00583                                     lv2 = lv2 & 0xFF00FF00;
00584                                     lv2 = (lv2 >> 8) | lv2;
00585 #else
00586                                     lv1 = lv1 & 0x00FF00FF;
00587                                     lv1 = (lv1 << 8) | lv1;
00588                                     lv2 = lv2 & 0x00FF00FF;
00589                                     lv2 = (lv2 << 8) | lv2;
00590 #endif
00591                                 }
00592 
00593                                 switch(correction_type_sp[lp2 & 0x01][k]) {
00594                                 case 0:
00595                                     cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);
00596                                     cur_lp[width_tbl[1]+1] = av_le2ne32(((av_le2ne32(lv2) >> 1) + correctionhighorder_lp[lp2 & 0x01][k]) << 1);
00597                                     if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {
00598                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00599                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00600                                     } else {
00601                                         cur_lp[0] = cur_lp[width_tbl[1]];
00602                                         cur_lp[1] = cur_lp[width_tbl[1]+1];
00603                                     }
00604                                     lp2++;
00605                                     break;
00606 
00607                                 case 1:
00608                                     cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][*buf1]) << 1);
00609                                     cur_lp[width_tbl[1]+1] = av_le2ne32(((av_le2ne32(lv2) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);
00610                                     if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {
00611                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00612                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00613                                     } else {
00614                                         cur_lp[0] = cur_lp[width_tbl[1]];
00615                                         cur_lp[1] = cur_lp[width_tbl[1]+1];
00616                                     }
00617                                     buf1++;
00618                                     lp2++;
00619                                     break;
00620 
00621                                 case 2:
00622                                     if(lp2 == 0) {
00623                                         if(flag1 != 0) {
00624                                             for(i = 0, j = width_tbl[1]; i < 3; i++, j += width_tbl[1]) {
00625                                                 cur_lp[j] = lv1;
00626                                                 cur_lp[j+1] = lv2;
00627                                             }
00628                                             cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00629                                             cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00630                                         } else {
00631                                             for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {
00632                                                 cur_lp[j] = lv1;
00633                                                 cur_lp[j+1] = lv2;
00634                                             }
00635                                         }
00636                                         lp2 += 2;
00637                                     }
00638                                     break;
00639 
00640                                 case 3:
00641                                     if(lp2 < 2) {
00642                                         if(lp2 == 0 && flag1 != 0) {
00643                                             for(i = 0, j = width_tbl[1]; i < 5; i++, j += width_tbl[1]) {
00644                                                 cur_lp[j] = lv1;
00645                                                 cur_lp[j+1] = lv2;
00646                                             }
00647                                             cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00648                                             cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00649                                         } else {
00650                                             for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {
00651                                                 cur_lp[j] = lv1;
00652                                                 cur_lp[j+1] = lv2;
00653                                             }
00654                                         }
00655                                         lp2 = 3;
00656                                     }
00657                                     break;
00658 
00659                                 case 8:
00660                                     if(lp2 == 0) {
00661                                         RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
00662                                         if(rle_v1 == 1) {
00663                                             if(flag1 != 0) {
00664                                                 for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {
00665                                                     cur_lp[j] = lv1;
00666                                                     cur_lp[j+1] = lv2;
00667                                                 }
00668                                                 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00669                                                 cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00670                                             } else {
00671                                                 for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {
00672                                                     cur_lp[j] = lv1;
00673                                                     cur_lp[j+1] = lv2;
00674                                                 }
00675                                             }
00676                                         }
00677                                         RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
00678                                         break;
00679                                     } else {
00680                                         rle_v1 = 1;
00681                                         rle_v2 = (*buf1) - 1;
00682                                     }
00683                                 case 5:
00684                                     LP2_CHECK(buf1,rle_v3,lp2)
00685                                 case 4:
00686                                     if(lp2 == 0 && flag1 != 0) {
00687                                         for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {
00688                                             cur_lp[j] = lv1;
00689                                             cur_lp[j+1] = lv2;
00690                                         }
00691                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00692                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00693                                     } else {
00694                                         for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {
00695                                             cur_lp[j] = lv1;
00696                                             cur_lp[j+1] = lv2;
00697                                         }
00698                                     }
00699                                     lp2 = 4;
00700                                     break;
00701 
00702                                 case 6:
00703                                     lp2 = 4;
00704                                     break;
00705 
00706                                 case 7:
00707                                     if(lp2 == 0) {
00708                                         if(rle_v3 != 0)
00709                                             rle_v3 = 0;
00710                                         else {
00711                                             buf1--;
00712                                             rle_v3 = 1;
00713                                         }
00714                                         lp2 = 4;
00715                                     }
00716                                     break;
00717 
00718                                 case 9:
00719                                     av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
00720                                     lv1 = *buf1;
00721                                     lv = (lv1 & 0x7F) << 1;
00722                                     lv += (lv << 8);
00723                                     lv += (lv << 16);
00724                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
00725                                         cur_lp[j] = lv;
00726                                     LV1_CHECK(buf1,rle_v3,lv1,lp2)
00727                                     break;
00728 
00729                                 default:
00730                                     return;
00731                                 }
00732                             }
00733 
00734                             cur_frm_pos += 8;
00735                         }
00736 
00737                         cur_frm_pos += (((width * 2) - blks_width) * 4);
00738                         flag1 = 0;
00739                     }
00740                 } else {
00741                     for( ; blks_height > 0; blks_height -= 8) {
00742                         for(lp1 = 0; lp1 < blks_width; lp1 += 2) {
00743                             for(lp2 = 0; lp2 < 4; ) {
00744                                 k = *buf1++;
00745                                 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
00746                                 ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];
00747 
00748                                 switch(correction_type_sp[lp2 & 0x01][k]) {
00749                                 case 0:
00750                                     lv1 = correctionloworder_lp[lp2 & 0x01][k];
00751                                     lv2 = correctionhighorder_lp[lp2 & 0x01][k];
00752                                     cur_lp[0] = av_le2ne32(((av_le2ne32(ref_lp[0]) >> 1) + lv1) << 1);
00753                                     cur_lp[1] = av_le2ne32(((av_le2ne32(ref_lp[1]) >> 1) + lv2) << 1);
00754                                     cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);
00755                                     cur_lp[width_tbl[1]+1] = av_le2ne32(((av_le2ne32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);
00756                                     lp2++;
00757                                     break;
00758 
00759                                 case 1:
00760                                     lv1 = correctionloworder_lp[lp2 & 0x01][*buf1++];
00761                                     lv2 = correctionloworder_lp[lp2 & 0x01][k];
00762                                     cur_lp[0] = av_le2ne32(((av_le2ne32(ref_lp[0]) >> 1) + lv1) << 1);
00763                                     cur_lp[1] = av_le2ne32(((av_le2ne32(ref_lp[1]) >> 1) + lv2) << 1);
00764                                     cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);
00765                                     cur_lp[width_tbl[1]+1] = av_le2ne32(((av_le2ne32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);
00766                                     lp2++;
00767                                     break;
00768 
00769                                 case 2:
00770                                     if(lp2 == 0) {
00771                                         for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {
00772                                             cur_lp[j] = ref_lp[j];
00773                                             cur_lp[j+1] = ref_lp[j+1];
00774                                         }
00775                                         lp2 += 2;
00776                                     }
00777                                     break;
00778 
00779                                 case 3:
00780                                     if(lp2 < 2) {
00781                                         for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {
00782                                             cur_lp[j] = ref_lp[j];
00783                                             cur_lp[j+1] = ref_lp[j+1];
00784                                         }
00785                                         lp2 = 3;
00786                                     }
00787                                     break;
00788 
00789                                 case 8:
00790                                     if(lp2 == 0) {
00791                                         RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
00792                                         for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {
00793                                             ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];
00794                                             ((uint32_t *)cur_frm_pos)[j+1] = ((uint32_t *)ref_frm_pos)[j+1];
00795                                         }
00796                                         RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
00797                                         break;
00798                                     } else {
00799                                         rle_v1 = 1;
00800                                         rle_v2 = (*buf1) - 1;
00801                                     }
00802                                 case 5:
00803                                 case 7:
00804                                     LP2_CHECK(buf1,rle_v3,lp2)
00805                                 case 6:
00806                                 case 4:
00807                                     for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {
00808                                         cur_lp[j] = ref_lp[j];
00809                                         cur_lp[j+1] = ref_lp[j+1];
00810                                     }
00811                                     lp2 = 4;
00812                                     break;
00813 
00814                                 case 9:
00815                                     av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
00816                                     lv1 = *buf1;
00817                                     lv = (lv1 & 0x7F) << 1;
00818                                     lv += (lv << 8);
00819                                     lv += (lv << 16);
00820                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
00821                                         ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)cur_frm_pos)[j+1] = lv;
00822                                     LV1_CHECK(buf1,rle_v3,lv1,lp2)
00823                                     break;
00824 
00825                                 default:
00826                                     return;
00827                                 }
00828                             }
00829 
00830                             cur_frm_pos += 8;
00831                             ref_frm_pos += 8;
00832                         }
00833 
00834                         cur_frm_pos += (((width * 2) - blks_width) * 4);
00835                         ref_frm_pos += (((width * 2) - blks_width) * 4);
00836                     }
00837                 }
00838                 break;
00839 
00840             case 11:                    /********** CASE 11 **********/
00841                 if(ref_vectors == NULL)
00842                     return;
00843 
00844                 for( ; blks_height > 0; blks_height -= 8) {
00845                     for(lp1 = 0; lp1 < blks_width; lp1++) {
00846                         for(lp2 = 0; lp2 < 4; ) {
00847                             k = *buf1++;
00848                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
00849                             ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];
00850 
00851                             switch(correction_type_sp[lp2 & 0x01][k]) {
00852                             case 0:
00853                                 cur_lp[0] = av_le2ne32(((av_le2ne32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
00854                                 cur_lp[width_tbl[1]] = av_le2ne32(((av_le2ne32(ref_lp[width_tbl[1]]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
00855                                 lp2++;
00856                                 break;
00857 
00858                             case 1:
00859                                 lv1 = (unsigned short)(correction_lp[lp2 & 0x01][*buf1++]);
00860                                 lv2 = (unsigned short)(correction_lp[lp2 & 0x01][k]);
00861                                 res = (unsigned short)(((av_le2ne16(((unsigned short *)ref_lp)[0]) >> 1) + lv1) << 1);
00862                                 ((unsigned short *)cur_lp)[0] = av_le2ne16(res);
00863                                 res = (unsigned short)(((av_le2ne16(((unsigned short *)ref_lp)[1]) >> 1) + lv2) << 1);
00864                                 ((unsigned short *)cur_lp)[1] = av_le2ne16(res);
00865                                 res = (unsigned short)(((av_le2ne16(((unsigned short *)ref_lp)[width_tbl[2]]) >> 1) + lv1) << 1);
00866                                 ((unsigned short *)cur_lp)[width_tbl[2]] = av_le2ne16(res);
00867                                 res = (unsigned short)(((av_le2ne16(((unsigned short *)ref_lp)[width_tbl[2]+1]) >> 1) + lv2) << 1);
00868                                 ((unsigned short *)cur_lp)[width_tbl[2]+1] = av_le2ne16(res);
00869                                 lp2++;
00870                                 break;
00871 
00872                             case 2:
00873                                 if(lp2 == 0) {
00874                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00875                                         cur_lp[j] = ref_lp[j];
00876                                     lp2 += 2;
00877                                 }
00878                                 break;
00879 
00880                             case 3:
00881                                 if(lp2 < 2) {
00882                                     for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])
00883                                         cur_lp[j] = ref_lp[j];
00884                                     lp2 = 3;
00885                                 }
00886                                 break;
00887 
00888                             case 8:
00889                                 if(lp2 == 0) {
00890                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
00891 
00892                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
00893                                         cur_lp[j] = ref_lp[j];
00894 
00895                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
00896                                     break;
00897                                 } else {
00898                                     rle_v1 = 1;
00899                                     rle_v2 = (*buf1) - 1;
00900                                 }
00901                             case 5:
00902                             case 7:
00903                                 LP2_CHECK(buf1,rle_v3,lp2)
00904                             case 4:
00905                             case 6:
00906                                 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])
00907                                     cur_lp[j] = ref_lp[j];
00908                                 lp2 = 4;
00909                                 break;
00910 
00911                             case 9:
00912                                 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
00913                                 lv1 = *buf1++;
00914                                 lv = (lv1 & 0x7F) << 1;
00915                                 lv += (lv << 8);
00916                                 lv += (lv << 16);
00917                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00918                                     cur_lp[j] = lv;
00919                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
00920                                 break;
00921 
00922                             default:
00923                                 return;
00924                             }
00925                         }
00926 
00927                         cur_frm_pos += 4;
00928                         ref_frm_pos += 4;
00929                     }
00930 
00931                     cur_frm_pos += (((width * 2) - blks_width) * 4);
00932                     ref_frm_pos += (((width * 2) - blks_width) * 4);
00933                 }
00934                 break;
00935 
00936             default:
00937                 return;
00938             }
00939         }
00940 
00941         for( ; strip >= strip_tbl; strip--) {
00942             if(strip->split_flag != 0) {
00943                 strip->split_flag = 0;
00944                 strip->usl7 = (strip-1)->usl7;
00945 
00946                 if(strip->split_direction) {
00947                     strip->xpos += strip->width;
00948                     strip->width = (strip-1)->width - strip->width;
00949                     if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)
00950                         strip->width = width - strip->xpos;
00951                 } else {
00952                     strip->ypos += strip->height;
00953                     strip->height = (strip-1)->height - strip->height;
00954                 }
00955                 break;
00956             }
00957         }
00958     }
00959 }
00960 
00961 static av_cold int indeo3_decode_init(AVCodecContext *avctx)
00962 {
00963     Indeo3DecodeContext *s = avctx->priv_data;
00964     int ret = 0;
00965 
00966     s->avctx = avctx;
00967     s->width = avctx->width;
00968     s->height = avctx->height;
00969     avctx->pix_fmt = PIX_FMT_YUV410P;
00970 
00971     if (!(ret = build_modpred(s)))
00972         ret = iv_alloc_frames(s);
00973     if (ret)
00974         iv_free_func(s);
00975 
00976     return ret;
00977 }
00978 
00979 static int iv_decode_frame(AVCodecContext *avctx,
00980                            const uint8_t *buf, int buf_size)
00981 {
00982     Indeo3DecodeContext *s = avctx->priv_data;
00983     unsigned int image_width, image_height,
00984                  chroma_width, chroma_height;
00985     unsigned int flags, cb_offset, data_size,
00986                   y_offset, v_offset, u_offset, mc_vector_count;
00987     const uint8_t *hdr_pos, *buf_pos;
00988 
00989     buf_pos = buf;
00990     buf_pos += 18; /* skip OS header (16 bytes) and version number */
00991 
00992     flags = bytestream_get_le16(&buf_pos);
00993     data_size = bytestream_get_le32(&buf_pos);
00994     cb_offset = *buf_pos++;
00995     buf_pos += 3; /* skip reserved byte and checksum */
00996     image_height = bytestream_get_le16(&buf_pos);
00997     image_width  = bytestream_get_le16(&buf_pos);
00998 
00999     if(av_image_check_size(image_width, image_height, 0, avctx))
01000         return -1;
01001     if (image_width != avctx->width || image_height != avctx->height) {
01002         int ret;
01003         avcodec_set_dimensions(avctx, image_width, image_height);
01004         s->width  = avctx->width;
01005         s->height = avctx->height;
01006         ret = iv_alloc_frames(s);
01007         if (ret < 0) {
01008             s->width = s->height = 0;
01009             return ret;
01010         }
01011     }
01012 
01013     chroma_height = ((image_height >> 2) + 3) & 0x7ffc;
01014     chroma_width = ((image_width >> 2) + 3) & 0x7ffc;
01015     y_offset = bytestream_get_le32(&buf_pos);
01016     v_offset = bytestream_get_le32(&buf_pos);
01017     u_offset = bytestream_get_le32(&buf_pos);
01018     buf_pos += 4; /* reserved */
01019     hdr_pos = buf_pos;
01020     if(data_size == 0x80) return 4;
01021 
01022     if(FFMAX3(y_offset, v_offset, u_offset) >= buf_size-16) {
01023         av_log(s->avctx, AV_LOG_ERROR, "y/u/v offset outside buffer\n");
01024         return -1;
01025     }
01026 
01027     if(flags & 0x200) {
01028         s->cur_frame = s->iv_frame + 1;
01029         s->ref_frame = s->iv_frame;
01030     } else {
01031         s->cur_frame = s->iv_frame;
01032         s->ref_frame = s->iv_frame + 1;
01033     }
01034 
01035     buf_pos = buf + 16 + y_offset;
01036     mc_vector_count = bytestream_get_le32(&buf_pos);
01037     if(2LL*mc_vector_count >= buf_size-16-y_offset) {
01038         av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
01039         return -1;
01040     }
01041 
01042     iv_Decode_Chunk(s, s->cur_frame->Ybuf, s->ref_frame->Ybuf, image_width,
01043                     image_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
01044                     FFMIN(image_width, 160));
01045 
01046     if (!(s->avctx->flags & CODEC_FLAG_GRAY))
01047     {
01048 
01049         buf_pos = buf + 16 + v_offset;
01050         mc_vector_count = bytestream_get_le32(&buf_pos);
01051         if(2LL*mc_vector_count >= buf_size-16-v_offset) {
01052             av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
01053             return -1;
01054         }
01055 
01056         iv_Decode_Chunk(s, s->cur_frame->Vbuf, s->ref_frame->Vbuf, chroma_width,
01057                 chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
01058                 FFMIN(chroma_width, 40));
01059 
01060         buf_pos = buf + 16 + u_offset;
01061         mc_vector_count = bytestream_get_le32(&buf_pos);
01062         if(2LL*mc_vector_count >= buf_size-16-u_offset) {
01063             av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
01064             return -1;
01065         }
01066 
01067         iv_Decode_Chunk(s, s->cur_frame->Ubuf, s->ref_frame->Ubuf, chroma_width,
01068                 chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
01069                 FFMIN(chroma_width, 40));
01070 
01071     }
01072 
01073     return 8;
01074 }
01075 
01076 static int indeo3_decode_frame(AVCodecContext *avctx,
01077                                void *data, int *data_size,
01078                                AVPacket *avpkt)
01079 {
01080     const uint8_t *buf = avpkt->data;
01081     int buf_size = avpkt->size;
01082     Indeo3DecodeContext *s=avctx->priv_data;
01083     uint8_t *src, *dest;
01084     int y;
01085 
01086     if (iv_decode_frame(avctx, buf, buf_size) < 0)
01087         return -1;
01088 
01089     if(s->frame.data[0])
01090         avctx->release_buffer(avctx, &s->frame);
01091 
01092     s->frame.reference = 0;
01093     if(avctx->get_buffer(avctx, &s->frame) < 0) {
01094         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
01095         return -1;
01096     }
01097 
01098     src = s->cur_frame->Ybuf;
01099     dest = s->frame.data[0];
01100     for (y = 0; y < s->height; y++) {
01101         memcpy(dest, src, s->cur_frame->y_w);
01102         src += s->cur_frame->y_w;
01103         dest += s->frame.linesize[0];
01104     }
01105 
01106     if (!(s->avctx->flags & CODEC_FLAG_GRAY))
01107     {
01108         src = s->cur_frame->Ubuf;
01109         dest = s->frame.data[1];
01110         for (y = 0; y < s->height / 4; y++) {
01111             memcpy(dest, src, s->cur_frame->uv_w);
01112             src += s->cur_frame->uv_w;
01113             dest += s->frame.linesize[1];
01114         }
01115 
01116         src = s->cur_frame->Vbuf;
01117         dest = s->frame.data[2];
01118         for (y = 0; y < s->height / 4; y++) {
01119             memcpy(dest, src, s->cur_frame->uv_w);
01120             src += s->cur_frame->uv_w;
01121             dest += s->frame.linesize[2];
01122         }
01123     }
01124 
01125     *data_size=sizeof(AVFrame);
01126     *(AVFrame*)data= s->frame;
01127 
01128     return buf_size;
01129 }
01130 
01131 static av_cold int indeo3_decode_end(AVCodecContext *avctx)
01132 {
01133     Indeo3DecodeContext *s = avctx->priv_data;
01134 
01135     iv_free_func(s);
01136 
01137     return 0;
01138 }
01139 
01140 AVCodec ff_indeo3_decoder = {
01141     "indeo3",
01142     AVMEDIA_TYPE_VIDEO,
01143     CODEC_ID_INDEO3,
01144     sizeof(Indeo3DecodeContext),
01145     indeo3_decode_init,
01146     NULL,
01147     indeo3_decode_end,
01148     indeo3_decode_frame,
01149     CODEC_CAP_DR1,
01150     NULL,
01151     .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),
01152 };