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00028 #include "internal.h"
00029 #include "dsputil.h"
00030 #include "avcodec.h"
00031 #include "h264.h"
00032 #include "golomb.h"
00033
00034
00035 #include <assert.h>
00036
00037
00038 static void pic_as_field(Picture *pic, const int parity){
00039 int i;
00040 for (i = 0; i < 4; ++i) {
00041 if (parity == PICT_BOTTOM_FIELD)
00042 pic->f.data[i] += pic->f.linesize[i];
00043 pic->f.reference = parity;
00044 pic->f.linesize[i] *= 2;
00045 }
00046 pic->poc= pic->field_poc[parity == PICT_BOTTOM_FIELD];
00047 }
00048
00049 static int split_field_copy(Picture *dest, Picture *src,
00050 int parity, int id_add){
00051 int match = !!(src->f.reference & parity);
00052
00053 if (match) {
00054 *dest = *src;
00055 if(parity != PICT_FRAME){
00056 pic_as_field(dest, parity);
00057 dest->pic_id *= 2;
00058 dest->pic_id += id_add;
00059 }
00060 }
00061
00062 return match;
00063 }
00064
00065 static int build_def_list(Picture *def, Picture **in, int len, int is_long, int sel){
00066 int i[2]={0};
00067 int index=0;
00068
00069 while(i[0]<len || i[1]<len){
00070 while (i[0] < len && !(in[ i[0] ] && (in[ i[0] ]->f.reference & sel)))
00071 i[0]++;
00072 while (i[1] < len && !(in[ i[1] ] && (in[ i[1] ]->f.reference & (sel^3))))
00073 i[1]++;
00074 if(i[0] < len){
00075 in[ i[0] ]->pic_id= is_long ? i[0] : in[ i[0] ]->frame_num;
00076 split_field_copy(&def[index++], in[ i[0]++ ], sel , 1);
00077 }
00078 if(i[1] < len){
00079 in[ i[1] ]->pic_id= is_long ? i[1] : in[ i[1] ]->frame_num;
00080 split_field_copy(&def[index++], in[ i[1]++ ], sel^3, 0);
00081 }
00082 }
00083
00084 return index;
00085 }
00086
00087 static int add_sorted(Picture **sorted, Picture **src, int len, int limit, int dir){
00088 int i, best_poc;
00089 int out_i= 0;
00090
00091 for(;;){
00092 best_poc= dir ? INT_MIN : INT_MAX;
00093
00094 for(i=0; i<len; i++){
00095 const int poc= src[i]->poc;
00096 if(((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)){
00097 best_poc= poc;
00098 sorted[out_i]= src[i];
00099 }
00100 }
00101 if(best_poc == (dir ? INT_MIN : INT_MAX))
00102 break;
00103 limit= sorted[out_i++]->poc - dir;
00104 }
00105 return out_i;
00106 }
00107
00108 int ff_h264_fill_default_ref_list(H264Context *h){
00109 MpegEncContext * const s = &h->s;
00110 int i, len;
00111
00112 if(h->slice_type_nos==AV_PICTURE_TYPE_B){
00113 Picture *sorted[32];
00114 int cur_poc, list;
00115 int lens[2];
00116
00117 if(FIELD_PICTURE)
00118 cur_poc= s->current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
00119 else
00120 cur_poc= s->current_picture_ptr->poc;
00121
00122 for(list= 0; list<2; list++){
00123 len= add_sorted(sorted , h->short_ref, h->short_ref_count, cur_poc, 1^list);
00124 len+=add_sorted(sorted+len, h->short_ref, h->short_ref_count, cur_poc, 0^list);
00125 assert(len<=32);
00126 len= build_def_list(h->default_ref_list[list] , sorted , len, 0, s->picture_structure);
00127 len+=build_def_list(h->default_ref_list[list]+len, h->long_ref, 16 , 1, s->picture_structure);
00128 assert(len<=32);
00129
00130 if(len < h->ref_count[list])
00131 memset(&h->default_ref_list[list][len], 0, sizeof(Picture)*(h->ref_count[list] - len));
00132 lens[list]= len;
00133 }
00134
00135 if(lens[0] == lens[1] && lens[1] > 1){
00136 for (i = 0; h->default_ref_list[0][i].f.data[0] == h->default_ref_list[1][i].f.data[0] && i < lens[0]; i++);
00137 if(i == lens[0])
00138 FFSWAP(Picture, h->default_ref_list[1][0], h->default_ref_list[1][1]);
00139 }
00140 }else{
00141 len = build_def_list(h->default_ref_list[0] , h->short_ref, h->short_ref_count, 0, s->picture_structure);
00142 len+= build_def_list(h->default_ref_list[0]+len, h-> long_ref, 16 , 1, s->picture_structure);
00143 assert(len <= 32);
00144 if(len < h->ref_count[0])
00145 memset(&h->default_ref_list[0][len], 0, sizeof(Picture)*(h->ref_count[0] - len));
00146 }
00147 #ifdef TRACE
00148 for (i=0; i<h->ref_count[0]; i++) {
00149 tprintf(h->s.avctx, "List0: %s fn:%d 0x%p\n", (h->default_ref_list[0][i].long_ref ? "LT" : "ST"), h->default_ref_list[0][i].pic_id, h->default_ref_list[0][i].data[0]);
00150 }
00151 if(h->slice_type_nos==AV_PICTURE_TYPE_B){
00152 for (i=0; i<h->ref_count[1]; i++) {
00153 tprintf(h->s.avctx, "List1: %s fn:%d 0x%p\n", (h->default_ref_list[1][i].long_ref ? "LT" : "ST"), h->default_ref_list[1][i].pic_id, h->default_ref_list[1][i].data[0]);
00154 }
00155 }
00156 #endif
00157 return 0;
00158 }
00159
00160 static void print_short_term(H264Context *h);
00161 static void print_long_term(H264Context *h);
00162
00173 static int pic_num_extract(H264Context *h, int pic_num, int *structure){
00174 MpegEncContext * const s = &h->s;
00175
00176 *structure = s->picture_structure;
00177 if(FIELD_PICTURE){
00178 if (!(pic_num & 1))
00179
00180 *structure ^= PICT_FRAME;
00181 pic_num >>= 1;
00182 }
00183
00184 return pic_num;
00185 }
00186
00187 int ff_h264_decode_ref_pic_list_reordering(H264Context *h){
00188 MpegEncContext * const s = &h->s;
00189 int list, index, pic_structure;
00190
00191 print_short_term(h);
00192 print_long_term(h);
00193
00194 for(list=0; list<h->list_count; list++){
00195 memcpy(h->ref_list[list], h->default_ref_list[list], sizeof(Picture)*h->ref_count[list]);
00196
00197 if(get_bits1(&s->gb)){
00198 int pred= h->curr_pic_num;
00199
00200 for(index=0; ; index++){
00201 unsigned int reordering_of_pic_nums_idc= get_ue_golomb_31(&s->gb);
00202 unsigned int pic_id;
00203 int i;
00204 Picture *ref = NULL;
00205
00206 if(reordering_of_pic_nums_idc==3)
00207 break;
00208
00209 if(index >= h->ref_count[list]){
00210 av_log(h->s.avctx, AV_LOG_ERROR, "reference count overflow\n");
00211 return -1;
00212 }
00213
00214 if(reordering_of_pic_nums_idc<3){
00215 if(reordering_of_pic_nums_idc<2){
00216 const unsigned int abs_diff_pic_num= get_ue_golomb(&s->gb) + 1;
00217 int frame_num;
00218
00219 if(abs_diff_pic_num > h->max_pic_num){
00220 av_log(h->s.avctx, AV_LOG_ERROR, "abs_diff_pic_num overflow\n");
00221 return -1;
00222 }
00223
00224 if(reordering_of_pic_nums_idc == 0) pred-= abs_diff_pic_num;
00225 else pred+= abs_diff_pic_num;
00226 pred &= h->max_pic_num - 1;
00227
00228 frame_num = pic_num_extract(h, pred, &pic_structure);
00229
00230 for(i= h->short_ref_count-1; i>=0; i--){
00231 ref = h->short_ref[i];
00232 assert(ref->f.reference);
00233 assert(!ref->long_ref);
00234 if(
00235 ref->frame_num == frame_num &&
00236 (ref->f.reference & pic_structure)
00237 )
00238 break;
00239 }
00240 if(i>=0)
00241 ref->pic_id= pred;
00242 }else{
00243 int long_idx;
00244 pic_id= get_ue_golomb(&s->gb);
00245
00246 long_idx= pic_num_extract(h, pic_id, &pic_structure);
00247
00248 if(long_idx>31){
00249 av_log(h->s.avctx, AV_LOG_ERROR, "long_term_pic_idx overflow\n");
00250 return -1;
00251 }
00252 ref = h->long_ref[long_idx];
00253 assert(!(ref && !ref->f.reference));
00254 if (ref && (ref->f.reference & pic_structure)) {
00255 ref->pic_id= pic_id;
00256 assert(ref->long_ref);
00257 i=0;
00258 }else{
00259 i=-1;
00260 }
00261 }
00262
00263 if (i < 0) {
00264 av_log(h->s.avctx, AV_LOG_ERROR, "reference picture missing during reorder\n");
00265 memset(&h->ref_list[list][index], 0, sizeof(Picture));
00266 } else {
00267 for(i=index; i+1<h->ref_count[list]; i++){
00268 if(ref->long_ref == h->ref_list[list][i].long_ref && ref->pic_id == h->ref_list[list][i].pic_id)
00269 break;
00270 }
00271 for(; i > index; i--){
00272 h->ref_list[list][i]= h->ref_list[list][i-1];
00273 }
00274 h->ref_list[list][index]= *ref;
00275 if (FIELD_PICTURE){
00276 pic_as_field(&h->ref_list[list][index], pic_structure);
00277 }
00278 }
00279 }else{
00280 av_log(h->s.avctx, AV_LOG_ERROR, "illegal reordering_of_pic_nums_idc\n");
00281 return -1;
00282 }
00283 }
00284 }
00285 }
00286 for(list=0; list<h->list_count; list++){
00287 for(index= 0; index < h->ref_count[list]; index++){
00288 if (!h->ref_list[list][index].f.data[0]) {
00289 av_log(h->s.avctx, AV_LOG_ERROR, "Missing reference picture\n");
00290 if (h->default_ref_list[list][0].f.data[0])
00291 h->ref_list[list][index]= h->default_ref_list[list][0];
00292 else
00293 return -1;
00294 }
00295 }
00296 }
00297
00298 return 0;
00299 }
00300
00301 void ff_h264_fill_mbaff_ref_list(H264Context *h){
00302 int list, i, j;
00303 for(list=0; list<2; list++){
00304 for(i=0; i<h->ref_count[list]; i++){
00305 Picture *frame = &h->ref_list[list][i];
00306 Picture *field = &h->ref_list[list][16+2*i];
00307 field[0] = *frame;
00308 for(j=0; j<3; j++)
00309 field[0].f.linesize[j] <<= 1;
00310 field[0].f.reference = PICT_TOP_FIELD;
00311 field[0].poc= field[0].field_poc[0];
00312 field[1] = field[0];
00313 for(j=0; j<3; j++)
00314 field[1].f.data[j] += frame->f.linesize[j];
00315 field[1].f.reference = PICT_BOTTOM_FIELD;
00316 field[1].poc= field[1].field_poc[1];
00317
00318 h->luma_weight[16+2*i][list][0] = h->luma_weight[16+2*i+1][list][0] = h->luma_weight[i][list][0];
00319 h->luma_weight[16+2*i][list][1] = h->luma_weight[16+2*i+1][list][1] = h->luma_weight[i][list][1];
00320 for(j=0; j<2; j++){
00321 h->chroma_weight[16+2*i][list][j][0] = h->chroma_weight[16+2*i+1][list][j][0] = h->chroma_weight[i][list][j][0];
00322 h->chroma_weight[16+2*i][list][j][1] = h->chroma_weight[16+2*i+1][list][j][1] = h->chroma_weight[i][list][j][1];
00323 }
00324 }
00325 }
00326 }
00327
00339 static inline int unreference_pic(H264Context *h, Picture *pic, int refmask){
00340 int i;
00341 if (pic->f.reference &= refmask) {
00342 return 0;
00343 } else {
00344 for(i = 0; h->delayed_pic[i]; i++)
00345 if(pic == h->delayed_pic[i]){
00346 pic->f.reference = DELAYED_PIC_REF;
00347 break;
00348 }
00349 return 1;
00350 }
00351 }
00352
00361 static Picture * find_short(H264Context *h, int frame_num, int *idx){
00362 MpegEncContext * const s = &h->s;
00363 int i;
00364
00365 for(i=0; i<h->short_ref_count; i++){
00366 Picture *pic= h->short_ref[i];
00367 if(s->avctx->debug&FF_DEBUG_MMCO)
00368 av_log(h->s.avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic);
00369 if(pic->frame_num == frame_num) {
00370 *idx = i;
00371 return pic;
00372 }
00373 }
00374 return NULL;
00375 }
00376
00383 static void remove_short_at_index(H264Context *h, int i){
00384 assert(i >= 0 && i < h->short_ref_count);
00385 h->short_ref[i]= NULL;
00386 if (--h->short_ref_count)
00387 memmove(&h->short_ref[i], &h->short_ref[i+1], (h->short_ref_count - i)*sizeof(Picture*));
00388 }
00389
00394 static Picture * remove_short(H264Context *h, int frame_num, int ref_mask){
00395 MpegEncContext * const s = &h->s;
00396 Picture *pic;
00397 int i;
00398
00399 if(s->avctx->debug&FF_DEBUG_MMCO)
00400 av_log(h->s.avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count);
00401
00402 pic = find_short(h, frame_num, &i);
00403 if (pic){
00404 if(unreference_pic(h, pic, ref_mask))
00405 remove_short_at_index(h, i);
00406 }
00407
00408 return pic;
00409 }
00410
00416 static Picture * remove_long(H264Context *h, int i, int ref_mask){
00417 Picture *pic;
00418
00419 pic= h->long_ref[i];
00420 if (pic){
00421 if(unreference_pic(h, pic, ref_mask)){
00422 assert(h->long_ref[i]->long_ref == 1);
00423 h->long_ref[i]->long_ref= 0;
00424 h->long_ref[i]= NULL;
00425 h->long_ref_count--;
00426 }
00427 }
00428
00429 return pic;
00430 }
00431
00432 void ff_h264_remove_all_refs(H264Context *h){
00433 int i;
00434
00435 for(i=0; i<16; i++){
00436 remove_long(h, i, 0);
00437 }
00438 assert(h->long_ref_count==0);
00439
00440 for(i=0; i<h->short_ref_count; i++){
00441 unreference_pic(h, h->short_ref[i], 0);
00442 h->short_ref[i]= NULL;
00443 }
00444 h->short_ref_count=0;
00445 }
00446
00450 static void print_short_term(H264Context *h) {
00451 uint32_t i;
00452 if(h->s.avctx->debug&FF_DEBUG_MMCO) {
00453 av_log(h->s.avctx, AV_LOG_DEBUG, "short term list:\n");
00454 for(i=0; i<h->short_ref_count; i++){
00455 Picture *pic= h->short_ref[i];
00456 av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n",
00457 i, pic->frame_num, pic->poc, pic->f.data[0]);
00458 }
00459 }
00460 }
00461
00465 static void print_long_term(H264Context *h) {
00466 uint32_t i;
00467 if(h->s.avctx->debug&FF_DEBUG_MMCO) {
00468 av_log(h->s.avctx, AV_LOG_DEBUG, "long term list:\n");
00469 for(i = 0; i < 16; i++){
00470 Picture *pic= h->long_ref[i];
00471 if (pic) {
00472 av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n",
00473 i, pic->frame_num, pic->poc, pic->f.data[0]);
00474 }
00475 }
00476 }
00477 }
00478
00479 void ff_generate_sliding_window_mmcos(H264Context *h) {
00480 MpegEncContext * const s = &h->s;
00481 assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
00482
00483 h->mmco_index= 0;
00484 if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
00485 !(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->f.reference)) {
00486 h->mmco[0].opcode= MMCO_SHORT2UNUSED;
00487 h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
00488 h->mmco_index= 1;
00489 if (FIELD_PICTURE) {
00490 h->mmco[0].short_pic_num *= 2;
00491 h->mmco[1].opcode= MMCO_SHORT2UNUSED;
00492 h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
00493 h->mmco_index= 2;
00494 }
00495 }
00496 }
00497
00498 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
00499 MpegEncContext * const s = &h->s;
00500 int i, av_uninit(j);
00501 int current_ref_assigned=0, err=0;
00502 Picture *av_uninit(pic);
00503
00504 if((s->avctx->debug&FF_DEBUG_MMCO) && mmco_count==0)
00505 av_log(h->s.avctx, AV_LOG_DEBUG, "no mmco here\n");
00506
00507 for(i=0; i<mmco_count; i++){
00508 int av_uninit(structure), av_uninit(frame_num);
00509 if(s->avctx->debug&FF_DEBUG_MMCO)
00510 av_log(h->s.avctx, AV_LOG_DEBUG, "mmco:%d %d %d\n", h->mmco[i].opcode, h->mmco[i].short_pic_num, h->mmco[i].long_arg);
00511
00512 if( mmco[i].opcode == MMCO_SHORT2UNUSED
00513 || mmco[i].opcode == MMCO_SHORT2LONG){
00514 frame_num = pic_num_extract(h, mmco[i].short_pic_num, &structure);
00515 pic = find_short(h, frame_num, &j);
00516 if(!pic){
00517 if(mmco[i].opcode != MMCO_SHORT2LONG || !h->long_ref[mmco[i].long_arg]
00518 || h->long_ref[mmco[i].long_arg]->frame_num != frame_num) {
00519 av_log(h->s.avctx, AV_LOG_ERROR, "mmco: unref short failure\n");
00520 err = AVERROR_INVALIDDATA;
00521 }
00522 continue;
00523 }
00524 }
00525
00526 switch(mmco[i].opcode){
00527 case MMCO_SHORT2UNUSED:
00528 if(s->avctx->debug&FF_DEBUG_MMCO)
00529 av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref short %d count %d\n", h->mmco[i].short_pic_num, h->short_ref_count);
00530 remove_short(h, frame_num, structure ^ PICT_FRAME);
00531 break;
00532 case MMCO_SHORT2LONG:
00533 if (h->long_ref[mmco[i].long_arg] != pic)
00534 remove_long(h, mmco[i].long_arg, 0);
00535
00536 remove_short_at_index(h, j);
00537 h->long_ref[ mmco[i].long_arg ]= pic;
00538 if (h->long_ref[ mmco[i].long_arg ]){
00539 h->long_ref[ mmco[i].long_arg ]->long_ref=1;
00540 h->long_ref_count++;
00541 }
00542 break;
00543 case MMCO_LONG2UNUSED:
00544 j = pic_num_extract(h, mmco[i].long_arg, &structure);
00545 pic = h->long_ref[j];
00546 if (pic) {
00547 remove_long(h, j, structure ^ PICT_FRAME);
00548 } else if(s->avctx->debug&FF_DEBUG_MMCO)
00549 av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref long failure\n");
00550 break;
00551 case MMCO_LONG:
00552
00553
00554
00555
00556
00557
00558
00559
00560 if (h->long_ref[mmco[i].long_arg] != s->current_picture_ptr) {
00561 remove_long(h, mmco[i].long_arg, 0);
00562
00563 h->long_ref[ mmco[i].long_arg ]= s->current_picture_ptr;
00564 h->long_ref[ mmco[i].long_arg ]->long_ref=1;
00565 h->long_ref_count++;
00566 }
00567
00568 s->current_picture_ptr->f.reference |= s->picture_structure;
00569 current_ref_assigned=1;
00570 break;
00571 case MMCO_SET_MAX_LONG:
00572 assert(mmco[i].long_arg <= 16);
00573
00574 for(j = mmco[i].long_arg; j<16; j++){
00575 remove_long(h, j, 0);
00576 }
00577 break;
00578 case MMCO_RESET:
00579 while(h->short_ref_count){
00580 remove_short(h, h->short_ref[0]->frame_num, 0);
00581 }
00582 for(j = 0; j < 16; j++) {
00583 remove_long(h, j, 0);
00584 }
00585 h->frame_num=
00586 s->current_picture_ptr->frame_num= 0;
00587 h->mmco_reset = 1;
00588 s->current_picture_ptr->mmco_reset=1;
00589 break;
00590 default: assert(0);
00591 }
00592 }
00593
00594 if (!current_ref_assigned) {
00595
00596
00597
00598
00599
00600
00601 if (h->short_ref_count && h->short_ref[0] == s->current_picture_ptr) {
00602
00603 s->current_picture_ptr->f.reference = PICT_FRAME;
00604 } else if (s->current_picture_ptr->long_ref) {
00605 av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term reference "
00606 "assignment for second field "
00607 "in complementary field pair "
00608 "(first field is long term)\n");
00609 err = AVERROR_INVALIDDATA;
00610 } else {
00611 pic= remove_short(h, s->current_picture_ptr->frame_num, 0);
00612 if(pic){
00613 av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n");
00614 err = AVERROR_INVALIDDATA;
00615 }
00616
00617 if(h->short_ref_count)
00618 memmove(&h->short_ref[1], &h->short_ref[0], h->short_ref_count*sizeof(Picture*));
00619
00620 h->short_ref[0]= s->current_picture_ptr;
00621 h->short_ref_count++;
00622 s->current_picture_ptr->f.reference |= s->picture_structure;
00623 }
00624 }
00625
00626 if (h->long_ref_count + h->short_ref_count -
00627 (h->short_ref[0] == s->current_picture_ptr) > h->sps.ref_frame_count){
00628
00629
00630
00631
00632
00633 av_log(h->s.avctx, AV_LOG_ERROR,
00634 "number of reference frames (%d+%d) exceeds max (%d; probably "
00635 "corrupt input), discarding one\n",
00636 h->long_ref_count, h->short_ref_count, h->sps.ref_frame_count);
00637 err = AVERROR_INVALIDDATA;
00638
00639 if (h->long_ref_count && !h->short_ref_count) {
00640 for (i = 0; i < 16; ++i)
00641 if (h->long_ref[i])
00642 break;
00643
00644 assert(i < 16);
00645 remove_long(h, i, 0);
00646 } else {
00647 pic = h->short_ref[h->short_ref_count - 1];
00648 remove_short(h, pic->frame_num, 0);
00649 }
00650 }
00651
00652 print_short_term(h);
00653 print_long_term(h);
00654 return (h->s.avctx->err_recognition & AV_EF_EXPLODE) ? err : 0;
00655 }
00656
00657 int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb){
00658 MpegEncContext * const s = &h->s;
00659 int i;
00660
00661 h->mmco_index= 0;
00662 if(h->nal_unit_type == NAL_IDR_SLICE){
00663 s->broken_link= get_bits1(gb) -1;
00664 if(get_bits1(gb)){
00665 h->mmco[0].opcode= MMCO_LONG;
00666 h->mmco[0].long_arg= 0;
00667 h->mmco_index= 1;
00668 }
00669 }else{
00670 if(get_bits1(gb)){
00671 for(i= 0; i<MAX_MMCO_COUNT; i++) {
00672 MMCOOpcode opcode= get_ue_golomb_31(gb);
00673
00674 h->mmco[i].opcode= opcode;
00675 if(opcode==MMCO_SHORT2UNUSED || opcode==MMCO_SHORT2LONG){
00676 h->mmco[i].short_pic_num= (h->curr_pic_num - get_ue_golomb(gb) - 1) & (h->max_pic_num - 1);
00677
00678
00679
00680
00681 }
00682 if(opcode==MMCO_SHORT2LONG || opcode==MMCO_LONG2UNUSED || opcode==MMCO_LONG || opcode==MMCO_SET_MAX_LONG){
00683 unsigned int long_arg= get_ue_golomb_31(gb);
00684 if(long_arg >= 32 || (long_arg >= 16 && !(opcode == MMCO_SET_MAX_LONG && long_arg == 16) && !(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE))){
00685 av_log(h->s.avctx, AV_LOG_ERROR, "illegal long ref in memory management control operation %d\n", opcode);
00686 return -1;
00687 }
00688 h->mmco[i].long_arg= long_arg;
00689 }
00690
00691 if(opcode > (unsigned)MMCO_LONG){
00692 av_log(h->s.avctx, AV_LOG_ERROR, "illegal memory management control operation %d\n", opcode);
00693 return -1;
00694 }
00695 if(opcode == MMCO_END)
00696 break;
00697 }
00698 h->mmco_index= i;
00699 }else{
00700 ff_generate_sliding_window_mmcos(h);
00701 }
00702 }
00703
00704 return 0;
00705 }