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libavcodec/indeo3.c

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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 FFmpeg.
00006  *
00007  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 "avcodec.h"
00027 #include "dsputil.h"
00028 #include "bytestream.h"
00029 
00030 #include "indeo3data.h"
00031 
00032 typedef struct
00033 {
00034     uint8_t *Ybuf;
00035     uint8_t *Ubuf;
00036     uint8_t *Vbuf;
00037     unsigned short y_w, y_h;
00038     unsigned short uv_w, uv_h;
00039 } YUVBufs;
00040 
00041 typedef struct Indeo3DecodeContext {
00042     AVCodecContext *avctx;
00043     int width, height;
00044     AVFrame frame;
00045 
00046     uint8_t *buf;
00047     YUVBufs iv_frame[2];
00048     YUVBufs *cur_frame;
00049     YUVBufs *ref_frame;
00050 
00051     uint8_t *ModPred;
00052     uint8_t *corrector_type;
00053 } Indeo3DecodeContext;
00054 
00055 static const uint8_t corrector_type_0[24] = {
00056     195, 159, 133, 115, 101,  93,  87,  77,
00057     195, 159, 133, 115, 101,  93,  87,  77,
00058     128,  79,  79,  79,  79,  79,  79,  79
00059 };
00060 
00061 static const uint8_t corrector_type_2[8] = { 9, 7, 6, 8, 5, 4, 3, 2 };
00062 
00063 static av_cold int build_modpred(Indeo3DecodeContext *s)
00064 {
00065     int i, j;
00066 
00067     if (!(s->ModPred = av_malloc(8 * 128)))
00068         return AVERROR(ENOMEM);
00069 
00070     for (i=0; i < 128; ++i) {
00071         s->ModPred[i+0*128] = i >  126 ? 254 : 2*(i + 1 - ((i + 1) % 2));
00072         s->ModPred[i+1*128] = i ==   7 ?  20 :
00073                               i == 119 ||
00074                               i == 120 ? 236 : 2*(i + 2 - ((i + 1) % 3));
00075         s->ModPred[i+2*128] = i >  125 ? 248 : 2*(i + 2 - ((i + 2) % 4));
00076         s->ModPred[i+3*128] =                  2*(i + 1 - ((i - 3) % 5));
00077         s->ModPred[i+4*128] = i ==   8 ?  20 : 2*(i + 1 - ((i - 3) % 6));
00078         s->ModPred[i+5*128] =                  2*(i + 4 - ((i + 3) % 7));
00079         s->ModPred[i+6*128] = i >  123 ? 240 : 2*(i + 4 - ((i + 4) % 8));
00080         s->ModPred[i+7*128] =                  2*(i + 5 - ((i + 4) % 9));
00081     }
00082 
00083     if (!(s->corrector_type = av_malloc(24 * 256)))
00084         return AVERROR(ENOMEM);
00085 
00086     for (i=0; i < 24; ++i) {
00087         for (j=0; j < 256; ++j) {
00088             s->corrector_type[i*256+j] = j < corrector_type_0[i]          ? 1 :
00089                                          j < 248 || (i == 16 && j == 248) ? 0 :
00090                                          corrector_type_2[j - 248];
00091         }
00092     }
00093 
00094   return 0;
00095 }
00096 
00097 static av_cold int iv_alloc_frames(Indeo3DecodeContext *s)
00098 {
00099     int luma_width    = (s->width           + 3) & ~3,
00100         luma_height   = (s->height          + 3) & ~3,
00101         chroma_width  = ((luma_width  >> 2) + 3) & ~3,
00102         chroma_height = ((luma_height >> 2) + 3) & ~3,
00103         luma_pixels   = luma_width   * luma_height,
00104         chroma_pixels = chroma_width * chroma_height,
00105         i;
00106     unsigned int bufsize = luma_pixels * 2 + luma_width * 3 +
00107                           (chroma_pixels   + chroma_width) * 4;
00108 
00109     av_freep(&s->buf);
00110     if(!(s->buf = av_malloc(bufsize)))
00111         return AVERROR(ENOMEM);
00112     s->iv_frame[0].y_w = s->iv_frame[1].y_w = luma_width;
00113     s->iv_frame[0].y_h = s->iv_frame[1].y_h = luma_height;
00114     s->iv_frame[0].uv_w = s->iv_frame[1].uv_w = chroma_width;
00115     s->iv_frame[0].uv_h = s->iv_frame[1].uv_h = chroma_height;
00116 
00117     s->iv_frame[0].Ybuf = s->buf + luma_width;
00118     i = luma_pixels + luma_width * 2;
00119     s->iv_frame[1].Ybuf = s->buf + i;
00120     i += (luma_pixels + luma_width);
00121     s->iv_frame[0].Ubuf = s->buf + i;
00122     i += (chroma_pixels + chroma_width);
00123     s->iv_frame[1].Ubuf = s->buf + i;
00124     i += (chroma_pixels + chroma_width);
00125     s->iv_frame[0].Vbuf = s->buf + i;
00126     i += (chroma_pixels + chroma_width);
00127     s->iv_frame[1].Vbuf = s->buf + i;
00128 
00129     for(i = 1; i <= luma_width; i++)
00130         s->iv_frame[0].Ybuf[-i] = s->iv_frame[1].Ybuf[-i] =
00131             s->iv_frame[0].Ubuf[-i] = 0x80;
00132 
00133     for(i = 1; i <= chroma_width; i++) {
00134         s->iv_frame[1].Ubuf[-i] = 0x80;
00135         s->iv_frame[0].Vbuf[-i] = 0x80;
00136         s->iv_frame[1].Vbuf[-i] = 0x80;
00137         s->iv_frame[1].Vbuf[chroma_pixels+i-1] = 0x80;
00138     }
00139 
00140     return 0;
00141 }
00142 
00143 static av_cold void iv_free_func(Indeo3DecodeContext *s)
00144 {
00145     av_freep(&s->buf);
00146     av_freep(&s->ModPred);
00147     av_freep(&s->corrector_type);
00148 }
00149 
00150 struct ustr {
00151     long xpos;
00152     long ypos;
00153     long width;
00154     long height;
00155     long split_flag;
00156     long split_direction;
00157     long usl7;
00158 };
00159 
00160 
00161 #define LV1_CHECK(buf1,rle_v3,lv1,lp2)  \
00162     if((lv1 & 0x80) != 0) {             \
00163         if(rle_v3 != 0)                 \
00164             rle_v3 = 0;                 \
00165         else {                          \
00166             rle_v3 = 1;                 \
00167             buf1 -= 2;                  \
00168         }                               \
00169     }                                   \
00170     lp2 = 4;
00171 
00172 
00173 #define RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)  \
00174     if(rle_v3 == 0) {                            \
00175         rle_v2 = *buf1;                          \
00176         rle_v1 = 1;                              \
00177         if(rle_v2 > 32) {                        \
00178             rle_v2 -= 32;                        \
00179             rle_v1 = 0;                          \
00180         }                                        \
00181         rle_v3 = 1;                              \
00182     }                                            \
00183     buf1--;
00184 
00185 
00186 #define LP2_CHECK(buf1,rle_v3,lp2)  \
00187     if(lp2 == 0 && rle_v3 != 0)     \
00188         rle_v3 = 0;                 \
00189     else {                          \
00190         buf1--;                     \
00191         rle_v3 = 1;                 \
00192     }
00193 
00194 
00195 #define RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) \
00196     rle_v2--;                                 \
00197     if(rle_v2 == 0) {                         \
00198         rle_v3 = 0;                           \
00199         buf1 += 2;                            \
00200     }                                         \
00201     lp2 = 4;
00202 
00203 static void iv_Decode_Chunk(Indeo3DecodeContext *s,
00204         uint8_t *cur, uint8_t *ref, int width, int height,
00205         const uint8_t *buf1, long cb_offset, const uint8_t *hdr,
00206         const uint8_t *buf2, int min_width_160)
00207 {
00208     uint8_t bit_buf;
00209     unsigned long bit_pos, lv, lv1, lv2;
00210     long *width_tbl, width_tbl_arr[10];
00211     const signed char *ref_vectors;
00212     uint8_t *cur_frm_pos, *ref_frm_pos, *cp, *cp2;
00213     uint32_t *cur_lp, *ref_lp;
00214     const uint32_t *correction_lp[2], *correctionloworder_lp[2], *correctionhighorder_lp[2];
00215     uint8_t *correction_type_sp[2];
00216     struct ustr strip_tbl[20], *strip;
00217     int i, j, k, lp1, lp2, flag1, cmd, blks_width, blks_height, region_160_width,
00218         rle_v1, rle_v2, rle_v3;
00219     unsigned short res;
00220 
00221     bit_buf = 0;
00222     ref_vectors = NULL;
00223 
00224     width_tbl = width_tbl_arr + 1;
00225     i = (width < 0 ? width + 3 : width)/4;
00226     for(j = -1; j < 8; j++)
00227         width_tbl[j] = i * j;
00228 
00229     strip = strip_tbl;
00230 
00231     for(region_160_width = 0; region_160_width < (width - min_width_160); region_160_width += min_width_160);
00232 
00233     strip->ypos = strip->xpos = 0;
00234     for(strip->width = min_width_160; width > strip->width; strip->width *= 2);
00235     strip->height = height;
00236     strip->split_direction = 0;
00237     strip->split_flag = 0;
00238     strip->usl7 = 0;
00239 
00240     bit_pos = 0;
00241 
00242     rle_v1 = rle_v2 = rle_v3 = 0;
00243 
00244     while(strip >= strip_tbl) {
00245         if(bit_pos <= 0) {
00246             bit_pos = 8;
00247             bit_buf = *buf1++;
00248         }
00249 
00250         bit_pos -= 2;
00251         cmd = (bit_buf >> bit_pos) & 0x03;
00252 
00253         if(cmd == 0) {
00254             strip++;
00255             if(strip >= strip_tbl + FF_ARRAY_ELEMS(strip_tbl)) {
00256                 av_log(s->avctx, AV_LOG_WARNING, "out of range strip\n");
00257                 break;
00258             }
00259             memcpy(strip, strip-1, sizeof(*strip));
00260             strip->split_flag = 1;
00261             strip->split_direction = 0;
00262             strip->height = (strip->height > 8 ? ((strip->height+8)>>4)<<3 : 4);
00263             continue;
00264         } else if(cmd == 1) {
00265             strip++;
00266             if(strip >= strip_tbl + FF_ARRAY_ELEMS(strip_tbl)) {
00267                 av_log(s->avctx, AV_LOG_WARNING, "out of range strip\n");
00268                 break;
00269             }
00270             memcpy(strip, strip-1, sizeof(*strip));
00271             strip->split_flag = 1;
00272             strip->split_direction = 1;
00273             strip->width = (strip->width > 8 ? ((strip->width+8)>>4)<<3 : 4);
00274             continue;
00275         } else if(cmd == 2) {
00276             if(strip->usl7 == 0) {
00277                 strip->usl7 = 1;
00278                 ref_vectors = NULL;
00279                 continue;
00280             }
00281         } else if(cmd == 3) {
00282             if(strip->usl7 == 0) {
00283                 strip->usl7 = 1;
00284                 ref_vectors = (const signed char*)buf2 + (*buf1 * 2);
00285                 buf1++;
00286                 continue;
00287             }
00288         }
00289 
00290         cur_frm_pos = cur + width * strip->ypos + strip->xpos;
00291 
00292         if((blks_width = strip->width) < 0)
00293             blks_width += 3;
00294         blks_width >>= 2;
00295         blks_height = strip->height;
00296 
00297         if(ref_vectors != NULL) {
00298             ref_frm_pos = ref + (ref_vectors[0] + strip->ypos) * width +
00299                 ref_vectors[1] + strip->xpos;
00300         } else
00301             ref_frm_pos = cur_frm_pos - width_tbl[4];
00302 
00303         if(cmd == 2) {
00304             if(bit_pos <= 0) {
00305                 bit_pos = 8;
00306                 bit_buf = *buf1++;
00307             }
00308 
00309             bit_pos -= 2;
00310             cmd = (bit_buf >> bit_pos) & 0x03;
00311 
00312             if(cmd == 0 || ref_vectors != NULL) {
00313                 for(lp1 = 0; lp1 < blks_width; lp1++) {
00314                     for(i = 0, j = 0; i < blks_height; i++, j += width_tbl[1])
00315                         ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];
00316                     cur_frm_pos += 4;
00317                     ref_frm_pos += 4;
00318                 }
00319             } else if(cmd != 1)
00320                 return;
00321         } else {
00322             k = *buf1 >> 4;
00323             j = *buf1 & 0x0f;
00324             buf1++;
00325             lv = j + cb_offset;
00326 
00327             if((lv - 8) <= 7 && (k == 0 || k == 3 || k == 10)) {
00328                 cp2 = s->ModPred + ((lv - 8) << 7);
00329                 cp = ref_frm_pos;
00330                 for(i = 0; i < blks_width << 2; i++) {
00331                     int v = *cp >> 1;
00332                     *(cp++) = cp2[v];
00333                 }
00334             }
00335 
00336             if(k == 1 || k == 4) {
00337                 lv = (hdr[j] & 0xf) + cb_offset;
00338                 correction_type_sp[0] = s->corrector_type + (lv << 8);
00339                 correction_lp[0] = correction + (lv << 8);
00340                 lv = (hdr[j] >> 4) + cb_offset;
00341                 correction_lp[1] = correction + (lv << 8);
00342                 correction_type_sp[1] = s->corrector_type + (lv << 8);
00343             } else {
00344                 correctionloworder_lp[0] = correctionloworder_lp[1] = correctionloworder + (lv << 8);
00345                 correctionhighorder_lp[0] = correctionhighorder_lp[1] = correctionhighorder + (lv << 8);
00346                 correction_type_sp[0] = correction_type_sp[1] = s->corrector_type + (lv << 8);
00347                 correction_lp[0] = correction_lp[1] = correction + (lv << 8);
00348             }
00349 
00350             switch(k) {
00351             case 1:
00352             case 0:                    /********** CASE 0 **********/
00353                 for( ; blks_height > 0; blks_height -= 4) {
00354                     for(lp1 = 0; lp1 < blks_width; lp1++) {
00355                         for(lp2 = 0; lp2 < 4; ) {
00356                             k = *buf1++;
00357                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2];
00358                             ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2];
00359 
00360                             switch(correction_type_sp[0][k]) {
00361                             case 0:
00362                                 *cur_lp = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
00363                                 lp2++;
00364                                 break;
00365                             case 1:
00366                                 res = ((le2me_16(((unsigned short *)(ref_lp))[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;
00367                                 ((unsigned short *)cur_lp)[0] = le2me_16(res);
00368                                 res = ((le2me_16(((unsigned short *)(ref_lp))[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
00369                                 ((unsigned short *)cur_lp)[1] = le2me_16(res);
00370                                 buf1++;
00371                                 lp2++;
00372                                 break;
00373                             case 2:
00374                                 if(lp2 == 0) {
00375                                     for(i = 0, j = 0; i < 2; i++, j += width_tbl[1])
00376                                         cur_lp[j] = ref_lp[j];
00377                                     lp2 += 2;
00378                                 }
00379                                 break;
00380                             case 3:
00381                                 if(lp2 < 2) {
00382                                     for(i = 0, j = 0; i < (3 - lp2); i++, j += width_tbl[1])
00383                                         cur_lp[j] = ref_lp[j];
00384                                     lp2 = 3;
00385                                 }
00386                                 break;
00387                             case 8:
00388                                 if(lp2 == 0) {
00389                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
00390 
00391                                     if(rle_v1 == 1 || ref_vectors != NULL) {
00392                                         for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00393                                             cur_lp[j] = ref_lp[j];
00394                                     }
00395 
00396                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
00397                                     break;
00398                                 } else {
00399                                     rle_v1 = 1;
00400                                     rle_v2 = *buf1 - 1;
00401                                 }
00402                             case 5:
00403                                 LP2_CHECK(buf1,rle_v3,lp2)
00404                             case 4:
00405                                 for(i = 0, j = 0; i < (4 - lp2); i++, j += width_tbl[1])
00406                                     cur_lp[j] = ref_lp[j];
00407                                 lp2 = 4;
00408                                 break;
00409 
00410                             case 7:
00411                                 if(rle_v3 != 0)
00412                                     rle_v3 = 0;
00413                                 else {
00414                                     buf1--;
00415                                     rle_v3 = 1;
00416                                 }
00417                             case 6:
00418                                 if(ref_vectors != NULL) {
00419                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00420                                         cur_lp[j] = ref_lp[j];
00421                                 }
00422                                 lp2 = 4;
00423                                 break;
00424 
00425                             case 9:
00426                                 lv1 = *buf1++;
00427                                 lv = (lv1 & 0x7F) << 1;
00428                                 lv += (lv << 8);
00429                                 lv += (lv << 16);
00430                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00431                                     cur_lp[j] = lv;
00432 
00433                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
00434                                 break;
00435                             default:
00436                                 return;
00437                             }
00438                         }
00439 
00440                         cur_frm_pos += 4;
00441                         ref_frm_pos += 4;
00442                     }
00443 
00444                     cur_frm_pos += ((width - blks_width) * 4);
00445                     ref_frm_pos += ((width - blks_width) * 4);
00446                 }
00447                 break;
00448 
00449             case 4:
00450             case 3:                    /********** CASE 3 **********/
00451                 if(ref_vectors != NULL)
00452                     return;
00453                 flag1 = 1;
00454 
00455                 for( ; blks_height > 0; blks_height -= 8) {
00456                     for(lp1 = 0; lp1 < blks_width; lp1++) {
00457                         for(lp2 = 0; lp2 < 4; ) {
00458                             k = *buf1++;
00459 
00460                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
00461                             ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];
00462 
00463                             switch(correction_type_sp[lp2 & 0x01][k]) {
00464                             case 0:
00465                                 cur_lp[width_tbl[1]] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
00466                                 if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)
00467                                     cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00468                                 else
00469                                     cur_lp[0] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
00470                                 lp2++;
00471                                 break;
00472 
00473                             case 1:
00474                                 res = ((le2me_16(((unsigned short *)ref_lp)[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;
00475                                 ((unsigned short *)cur_lp)[width_tbl[2]] = le2me_16(res);
00476                                 res = ((le2me_16(((unsigned short *)ref_lp)[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
00477                                 ((unsigned short *)cur_lp)[width_tbl[2]+1] = le2me_16(res);
00478 
00479                                 if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)
00480                                     cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00481                                 else
00482                                     cur_lp[0] = cur_lp[width_tbl[1]];
00483                                 buf1++;
00484                                 lp2++;
00485                                 break;
00486 
00487                             case 2:
00488                                 if(lp2 == 0) {
00489                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00490                                         cur_lp[j] = *ref_lp;
00491                                     lp2 += 2;
00492                                 }
00493                                 break;
00494 
00495                             case 3:
00496                                 if(lp2 < 2) {
00497                                     for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])
00498                                         cur_lp[j] = *ref_lp;
00499                                     lp2 = 3;
00500                                 }
00501                                 break;
00502 
00503                             case 6:
00504                                 lp2 = 4;
00505                                 break;
00506 
00507                             case 7:
00508                                 if(rle_v3 != 0)
00509                                     rle_v3 = 0;
00510                                 else {
00511                                     buf1--;
00512                                     rle_v3 = 1;
00513                                 }
00514                                 lp2 = 4;
00515                                 break;
00516 
00517                             case 8:
00518                                 if(lp2 == 0) {
00519                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
00520 
00521                                     if(rle_v1 == 1) {
00522                                         for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
00523                                             cur_lp[j] = ref_lp[j];
00524                                     }
00525 
00526                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
00527                                     break;
00528                                 } else {
00529                                     rle_v2 = (*buf1) - 1;
00530                                     rle_v1 = 1;
00531                                 }
00532                             case 5:
00533                                 LP2_CHECK(buf1,rle_v3,lp2)
00534                             case 4:
00535                                 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])
00536                                     cur_lp[j] = *ref_lp;
00537                                 lp2 = 4;
00538                                 break;
00539 
00540                             case 9:
00541                                 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
00542                                 lv1 = *buf1++;
00543                                 lv = (lv1 & 0x7F) << 1;
00544                                 lv += (lv << 8);
00545                                 lv += (lv << 16);
00546 
00547                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00548                                     cur_lp[j] = lv;
00549 
00550                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
00551                                 break;
00552 
00553                             default:
00554                                 return;
00555                             }
00556                         }
00557 
00558                         cur_frm_pos += 4;
00559                     }
00560 
00561                     cur_frm_pos += (((width * 2) - blks_width) * 4);
00562                     flag1 = 0;
00563                 }
00564                 break;
00565 
00566             case 10:                    /********** CASE 10 **********/
00567                 if(ref_vectors == NULL) {
00568                     flag1 = 1;
00569 
00570                     for( ; blks_height > 0; blks_height -= 8) {
00571                         for(lp1 = 0; lp1 < blks_width; lp1 += 2) {
00572                             for(lp2 = 0; lp2 < 4; ) {
00573                                 k = *buf1++;
00574                                 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
00575                                 ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];
00576                                 lv1 = ref_lp[0];
00577                                 lv2 = ref_lp[1];
00578                                 if(lp2 == 0 && flag1 != 0) {
00579 #if HAVE_BIGENDIAN
00580                                     lv1 = lv1 & 0xFF00FF00;
00581                                     lv1 = (lv1 >> 8) | lv1;
00582                                     lv2 = lv2 & 0xFF00FF00;
00583                                     lv2 = (lv2 >> 8) | lv2;
00584 #else
00585                                     lv1 = lv1 & 0x00FF00FF;
00586                                     lv1 = (lv1 << 8) | lv1;
00587                                     lv2 = lv2 & 0x00FF00FF;
00588                                     lv2 = (lv2 << 8) | lv2;
00589 #endif
00590                                 }
00591 
00592                                 switch(correction_type_sp[lp2 & 0x01][k]) {
00593                                 case 0:
00594                                     cur_lp[width_tbl[1]] = le2me_32(((le2me_32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);
00595                                     cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(lv2) >> 1) + correctionhighorder_lp[lp2 & 0x01][k]) << 1);
00596                                     if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {
00597                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00598                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00599                                     } else {
00600                                         cur_lp[0] = cur_lp[width_tbl[1]];
00601                                         cur_lp[1] = cur_lp[width_tbl[1]+1];
00602                                     }
00603                                     lp2++;
00604                                     break;
00605 
00606                                 case 1:
00607                                     cur_lp[width_tbl[1]] = le2me_32(((le2me_32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][*buf1]) << 1);
00608                                     cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(lv2) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);
00609                                     if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {
00610                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00611                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00612                                     } else {
00613                                         cur_lp[0] = cur_lp[width_tbl[1]];
00614                                         cur_lp[1] = cur_lp[width_tbl[1]+1];
00615                                     }
00616                                     buf1++;
00617                                     lp2++;
00618                                     break;
00619 
00620                                 case 2:
00621                                     if(lp2 == 0) {
00622                                         if(flag1 != 0) {
00623                                             for(i = 0, j = width_tbl[1]; i < 3; i++, j += width_tbl[1]) {
00624                                                 cur_lp[j] = lv1;
00625                                                 cur_lp[j+1] = lv2;
00626                                             }
00627                                             cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00628                                             cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00629                                         } else {
00630                                             for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {
00631                                                 cur_lp[j] = lv1;
00632                                                 cur_lp[j+1] = lv2;
00633                                             }
00634                                         }
00635                                         lp2 += 2;
00636                                     }
00637                                     break;
00638 
00639                                 case 3:
00640                                     if(lp2 < 2) {
00641                                         if(lp2 == 0 && flag1 != 0) {
00642                                             for(i = 0, j = width_tbl[1]; i < 5; i++, j += width_tbl[1]) {
00643                                                 cur_lp[j] = lv1;
00644                                                 cur_lp[j+1] = lv2;
00645                                             }
00646                                             cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00647                                             cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00648                                         } else {
00649                                             for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {
00650                                                 cur_lp[j] = lv1;
00651                                                 cur_lp[j+1] = lv2;
00652                                             }
00653                                         }
00654                                         lp2 = 3;
00655                                     }
00656                                     break;
00657 
00658                                 case 8:
00659                                     if(lp2 == 0) {
00660                                         RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
00661                                         if(rle_v1 == 1) {
00662                                             if(flag1 != 0) {
00663                                                 for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {
00664                                                     cur_lp[j] = lv1;
00665                                                     cur_lp[j+1] = lv2;
00666                                                 }
00667                                                 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00668                                                 cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00669                                             } else {
00670                                                 for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {
00671                                                     cur_lp[j] = lv1;
00672                                                     cur_lp[j+1] = lv2;
00673                                                 }
00674                                             }
00675                                         }
00676                                         RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
00677                                         break;
00678                                     } else {
00679                                         rle_v1 = 1;
00680                                         rle_v2 = (*buf1) - 1;
00681                                     }
00682                                 case 5:
00683                                     LP2_CHECK(buf1,rle_v3,lp2)
00684                                 case 4:
00685                                     if(lp2 == 0 && flag1 != 0) {
00686                                         for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {
00687                                             cur_lp[j] = lv1;
00688                                             cur_lp[j+1] = lv2;
00689                                         }
00690                                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
00691                                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
00692                                     } else {
00693                                         for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {
00694                                             cur_lp[j] = lv1;
00695                                             cur_lp[j+1] = lv2;
00696                                         }
00697                                     }
00698                                     lp2 = 4;
00699                                     break;
00700 
00701                                 case 6:
00702                                     lp2 = 4;
00703                                     break;
00704 
00705                                 case 7:
00706                                     if(lp2 == 0) {
00707                                         if(rle_v3 != 0)
00708                                             rle_v3 = 0;
00709                                         else {
00710                                             buf1--;
00711                                             rle_v3 = 1;
00712                                         }
00713                                         lp2 = 4;
00714                                     }
00715                                     break;
00716 
00717                                 case 9:
00718                                     av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
00719                                     lv1 = *buf1;
00720                                     lv = (lv1 & 0x7F) << 1;
00721                                     lv += (lv << 8);
00722                                     lv += (lv << 16);
00723                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
00724                                         cur_lp[j] = lv;
00725                                     LV1_CHECK(buf1,rle_v3,lv1,lp2)
00726                                     break;
00727 
00728                                 default:
00729                                     return;
00730                                 }
00731                             }
00732 
00733                             cur_frm_pos += 8;
00734                         }
00735 
00736                         cur_frm_pos += (((width * 2) - blks_width) * 4);
00737                         flag1 = 0;
00738                     }
00739                 } else {
00740                     for( ; blks_height > 0; blks_height -= 8) {
00741                         for(lp1 = 0; lp1 < blks_width; lp1 += 2) {
00742                             for(lp2 = 0; lp2 < 4; ) {
00743                                 k = *buf1++;
00744                                 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
00745                                 ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];
00746 
00747                                 switch(correction_type_sp[lp2 & 0x01][k]) {
00748                                 case 0:
00749                                     lv1 = correctionloworder_lp[lp2 & 0x01][k];
00750                                     lv2 = correctionhighorder_lp[lp2 & 0x01][k];
00751                                     cur_lp[0] = le2me_32(((le2me_32(ref_lp[0]) >> 1) + lv1) << 1);
00752                                     cur_lp[1] = le2me_32(((le2me_32(ref_lp[1]) >> 1) + lv2) << 1);
00753                                     cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);
00754                                     cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);
00755                                     lp2++;
00756                                     break;
00757 
00758                                 case 1:
00759                                     lv1 = correctionloworder_lp[lp2 & 0x01][*buf1++];
00760                                     lv2 = correctionloworder_lp[lp2 & 0x01][k];
00761                                     cur_lp[0] = le2me_32(((le2me_32(ref_lp[0]) >> 1) + lv1) << 1);
00762                                     cur_lp[1] = le2me_32(((le2me_32(ref_lp[1]) >> 1) + lv2) << 1);
00763                                     cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);
00764                                     cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);
00765                                     lp2++;
00766                                     break;
00767 
00768                                 case 2:
00769                                     if(lp2 == 0) {
00770                                         for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {
00771                                             cur_lp[j] = ref_lp[j];
00772                                             cur_lp[j+1] = ref_lp[j+1];
00773                                         }
00774                                         lp2 += 2;
00775                                     }
00776                                     break;
00777 
00778                                 case 3:
00779                                     if(lp2 < 2) {
00780                                         for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {
00781                                             cur_lp[j] = ref_lp[j];
00782                                             cur_lp[j+1] = ref_lp[j+1];
00783                                         }
00784                                         lp2 = 3;
00785                                     }
00786                                     break;
00787 
00788                                 case 8:
00789                                     if(lp2 == 0) {
00790                                         RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
00791                                         for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {
00792                                             ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];
00793                                             ((uint32_t *)cur_frm_pos)[j+1] = ((uint32_t *)ref_frm_pos)[j+1];
00794                                         }
00795                                         RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
00796                                         break;
00797                                     } else {
00798                                         rle_v1 = 1;
00799                                         rle_v2 = (*buf1) - 1;
00800                                     }
00801                                 case 5:
00802                                 case 7:
00803                                     LP2_CHECK(buf1,rle_v3,lp2)
00804                                 case 6:
00805                                 case 4:
00806                                     for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {
00807                                         cur_lp[j] = ref_lp[j];
00808                                         cur_lp[j+1] = ref_lp[j+1];
00809                                     }
00810                                     lp2 = 4;
00811                                     break;
00812 
00813                                 case 9:
00814                                     av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
00815                                     lv1 = *buf1;
00816                                     lv = (lv1 & 0x7F) << 1;
00817                                     lv += (lv << 8);
00818                                     lv += (lv << 16);
00819                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
00820                                         ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)cur_frm_pos)[j+1] = lv;
00821                                     LV1_CHECK(buf1,rle_v3,lv1,lp2)
00822                                     break;
00823 
00824                                 default:
00825                                     return;
00826                                 }
00827                             }
00828 
00829                             cur_frm_pos += 8;
00830                             ref_frm_pos += 8;
00831                         }
00832 
00833                         cur_frm_pos += (((width * 2) - blks_width) * 4);
00834                         ref_frm_pos += (((width * 2) - blks_width) * 4);
00835                     }
00836                 }
00837                 break;
00838 
00839             case 11:                    /********** CASE 11 **********/
00840                 if(ref_vectors == NULL)
00841                     return;
00842 
00843                 for( ; blks_height > 0; blks_height -= 8) {
00844                     for(lp1 = 0; lp1 < blks_width; lp1++) {
00845                         for(lp2 = 0; lp2 < 4; ) {
00846                             k = *buf1++;
00847                             cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
00848                             ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];
00849 
00850                             switch(correction_type_sp[lp2 & 0x01][k]) {
00851                             case 0:
00852                                 cur_lp[0] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
00853                                 cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
00854                                 lp2++;
00855                                 break;
00856 
00857                             case 1:
00858                                 lv1 = (unsigned short)(correction_lp[lp2 & 0x01][*buf1++]);
00859                                 lv2 = (unsigned short)(correction_lp[lp2 & 0x01][k]);
00860                                 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[0]) >> 1) + lv1) << 1);
00861                                 ((unsigned short *)cur_lp)[0] = le2me_16(res);
00862                                 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[1]) >> 1) + lv2) << 1);
00863                                 ((unsigned short *)cur_lp)[1] = le2me_16(res);
00864                                 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[width_tbl[2]]) >> 1) + lv1) << 1);
00865                                 ((unsigned short *)cur_lp)[width_tbl[2]] = le2me_16(res);
00866                                 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[width_tbl[2]+1]) >> 1) + lv2) << 1);
00867                                 ((unsigned short *)cur_lp)[width_tbl[2]+1] = le2me_16(res);
00868                                 lp2++;
00869                                 break;
00870 
00871                             case 2:
00872                                 if(lp2 == 0) {
00873                                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00874                                         cur_lp[j] = ref_lp[j];
00875                                     lp2 += 2;
00876                                 }
00877                                 break;
00878 
00879                             case 3:
00880                                 if(lp2 < 2) {
00881                                     for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])
00882                                         cur_lp[j] = ref_lp[j];
00883                                     lp2 = 3;
00884                                 }
00885                                 break;
00886 
00887                             case 8:
00888                                 if(lp2 == 0) {
00889                                     RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
00890 
00891                                     for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
00892                                         cur_lp[j] = ref_lp[j];
00893 
00894                                     RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
00895                                     break;
00896                                 } else {
00897                                     rle_v1 = 1;
00898                                     rle_v2 = (*buf1) - 1;
00899                                 }
00900                             case 5:
00901                             case 7:
00902                                 LP2_CHECK(buf1,rle_v3,lp2)
00903                             case 4:
00904                             case 6:
00905                                 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])
00906                                     cur_lp[j] = ref_lp[j];
00907                                 lp2 = 4;
00908                                 break;
00909 
00910                             case 9:
00911                                 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
00912                                 lv1 = *buf1++;
00913                                 lv = (lv1 & 0x7F) << 1;
00914                                 lv += (lv << 8);
00915                                 lv += (lv << 16);
00916                                 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
00917                                     cur_lp[j] = lv;
00918                                 LV1_CHECK(buf1,rle_v3,lv1,lp2)
00919                                 break;
00920 
00921                             default:
00922                                 return;
00923                             }
00924                         }
00925 
00926                         cur_frm_pos += 4;
00927                         ref_frm_pos += 4;
00928                     }
00929 
00930                     cur_frm_pos += (((width * 2) - blks_width) * 4);
00931                     ref_frm_pos += (((width * 2) - blks_width) * 4);
00932                 }
00933                 break;
00934 
00935             default:
00936                 return;
00937             }
00938         }
00939 
00940         for( ; strip >= strip_tbl; strip--) {
00941             if(strip->split_flag != 0) {
00942                 strip->split_flag = 0;
00943                 strip->usl7 = (strip-1)->usl7;
00944 
00945                 if(strip->split_direction) {
00946                     strip->xpos += strip->width;
00947                     strip->width = (strip-1)->width - strip->width;
00948                     if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)
00949                         strip->width = width - strip->xpos;
00950                 } else {
00951                     strip->ypos += strip->height;
00952                     strip->height = (strip-1)->height - strip->height;
00953                 }
00954                 break;
00955             }
00956         }
00957     }
00958 }
00959 
00960 static av_cold int indeo3_decode_init(AVCodecContext *avctx)
00961 {
00962     Indeo3DecodeContext *s = avctx->priv_data;
00963     int ret = 0;
00964 
00965     s->avctx = avctx;
00966     s->width = avctx->width;
00967     s->height = avctx->height;
00968     avctx->pix_fmt = PIX_FMT_YUV410P;
00969 
00970     if (!(ret = build_modpred(s)))
00971         ret = iv_alloc_frames(s);
00972     if (ret)
00973         iv_free_func(s);
00974 
00975     return ret;
00976 }
00977 
00978 static int iv_decode_frame(AVCodecContext *avctx,
00979                            const uint8_t *buf, int buf_size)
00980 {
00981     Indeo3DecodeContext *s = avctx->priv_data;
00982     unsigned int image_width, image_height,
00983                  chroma_width, chroma_height;
00984     unsigned long flags, cb_offset, data_size,
00985                   y_offset, v_offset, u_offset, mc_vector_count;
00986     const uint8_t *hdr_pos, *buf_pos;
00987 
00988     buf_pos = buf;
00989     buf_pos += 18; /* skip OS header (16 bytes) and version number */
00990 
00991     flags = bytestream_get_le16(&buf_pos);
00992     data_size = bytestream_get_le32(&buf_pos);
00993     cb_offset = *buf_pos++;
00994     buf_pos += 3; /* skip reserved byte and checksum */
00995     image_height = bytestream_get_le16(&buf_pos);
00996     image_width  = bytestream_get_le16(&buf_pos);
00997 
00998     if(avcodec_check_dimensions(avctx, image_width, image_height))
00999         return -1;
01000     if (image_width != avctx->width || image_height != avctx->height) {
01001         int ret;
01002         avcodec_set_dimensions(avctx, image_width, image_height);
01003         s->width  = avctx->width;
01004         s->height = avctx->height;
01005         ret = iv_alloc_frames(s);
01006         if (ret < 0) {
01007             s->width = s->height = 0;
01008             return ret;
01009         }
01010     }
01011 
01012     chroma_height = ((image_height >> 2) + 3) & 0x7ffc;
01013     chroma_width = ((image_width >> 2) + 3) & 0x7ffc;
01014     y_offset = bytestream_get_le32(&buf_pos);
01015     v_offset = bytestream_get_le32(&buf_pos);
01016     u_offset = bytestream_get_le32(&buf_pos);
01017     buf_pos += 4; /* reserved */
01018     hdr_pos = buf_pos;
01019     if(data_size == 0x80) return 4;
01020 
01021     if(FFMAX3(y_offset, v_offset, u_offset) >= buf_size-16) {
01022         av_log(s->avctx, AV_LOG_ERROR, "y/u/v offset outside buffer\n");
01023         return -1;
01024     }
01025 
01026     if(flags & 0x200) {
01027         s->cur_frame = s->iv_frame + 1;
01028         s->ref_frame = s->iv_frame;
01029     } else {
01030         s->cur_frame = s->iv_frame;
01031         s->ref_frame = s->iv_frame + 1;
01032     }
01033 
01034     buf_pos = buf + 16 + y_offset;
01035     mc_vector_count = bytestream_get_le32(&buf_pos);
01036     if(2LL*mc_vector_count >= buf_size-16-y_offset) {
01037         av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
01038         return -1;
01039     }
01040 
01041     iv_Decode_Chunk(s, s->cur_frame->Ybuf, s->ref_frame->Ybuf, image_width,
01042                     image_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
01043                     FFMIN(image_width, 160));
01044 
01045     if (!(s->avctx->flags & CODEC_FLAG_GRAY))
01046     {
01047 
01048         buf_pos = buf + 16 + v_offset;
01049         mc_vector_count = bytestream_get_le32(&buf_pos);
01050         if(2LL*mc_vector_count >= buf_size-16-v_offset) {
01051             av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
01052             return -1;
01053         }
01054 
01055         iv_Decode_Chunk(s, s->cur_frame->Vbuf, s->ref_frame->Vbuf, chroma_width,
01056                 chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
01057                 FFMIN(chroma_width, 40));
01058 
01059         buf_pos = buf + 16 + u_offset;
01060         mc_vector_count = bytestream_get_le32(&buf_pos);
01061         if(2LL*mc_vector_count >= buf_size-16-u_offset) {
01062             av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
01063             return -1;
01064         }
01065 
01066         iv_Decode_Chunk(s, s->cur_frame->Ubuf, s->ref_frame->Ubuf, chroma_width,
01067                 chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
01068                 FFMIN(chroma_width, 40));
01069 
01070     }
01071 
01072     return 8;
01073 }
01074 
01075 static int indeo3_decode_frame(AVCodecContext *avctx,
01076                                void *data, int *data_size,
01077                                AVPacket *avpkt)
01078 {
01079     const uint8_t *buf = avpkt->data;
01080     int buf_size = avpkt->size;
01081     Indeo3DecodeContext *s=avctx->priv_data;
01082     uint8_t *src, *dest;
01083     int y;
01084 
01085     if (iv_decode_frame(avctx, buf, buf_size) < 0)
01086         return -1;
01087 
01088     if(s->frame.data[0])
01089         avctx->release_buffer(avctx, &s->frame);
01090 
01091     s->frame.reference = 0;
01092     if(avctx->get_buffer(avctx, &s->frame) < 0) {
01093         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
01094         return -1;
01095     }
01096 
01097     src = s->cur_frame->Ybuf;
01098     dest = s->frame.data[0];
01099     for (y = 0; y < s->height; y++) {
01100         memcpy(dest, src, s->cur_frame->y_w);
01101         src += s->cur_frame->y_w;
01102         dest += s->frame.linesize[0];
01103     }
01104 
01105     if (!(s->avctx->flags & CODEC_FLAG_GRAY))
01106     {
01107         src = s->cur_frame->Ubuf;
01108         dest = s->frame.data[1];
01109         for (y = 0; y < s->height / 4; y++) {
01110             memcpy(dest, src, s->cur_frame->uv_w);
01111             src += s->cur_frame->uv_w;
01112             dest += s->frame.linesize[1];
01113         }
01114 
01115         src = s->cur_frame->Vbuf;
01116         dest = s->frame.data[2];
01117         for (y = 0; y < s->height / 4; y++) {
01118             memcpy(dest, src, s->cur_frame->uv_w);
01119             src += s->cur_frame->uv_w;
01120             dest += s->frame.linesize[2];
01121         }
01122     }
01123 
01124     *data_size=sizeof(AVFrame);
01125     *(AVFrame*)data= s->frame;
01126 
01127     return buf_size;
01128 }
01129 
01130 static av_cold int indeo3_decode_end(AVCodecContext *avctx)
01131 {
01132     Indeo3DecodeContext *s = avctx->priv_data;
01133 
01134     iv_free_func(s);
01135 
01136     return 0;
01137 }
01138 
01139 AVCodec indeo3_decoder = {
01140     "indeo3",
01141     AVMEDIA_TYPE_VIDEO,
01142     CODEC_ID_INDEO3,
01143     sizeof(Indeo3DecodeContext),
01144     indeo3_decode_init,
01145     NULL,
01146     indeo3_decode_end,
01147     indeo3_decode_frame,
01148     CODEC_CAP_DR1,
01149     NULL,
01150     .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),
01151 };

Generated on Fri Sep 16 2011 17:17:38 for FFmpeg by  doxygen 1.7.1