static int fill_default_ref_list(H264Context *h){ MpegEncContext * const s = &h->s; int i; int smallest_poc_greater_than_current = -1; int structure_sel; Picture sorted_short_ref[32]; Picture field_entry_list[2][32]; Picture *frame_list[2]; if (FIELD_PICTURE) { structure_sel = PICT_FRAME; frame_list[0] = field_entry_list[0]; frame_list[1] = field_entry_list[1]; } else { structure_sel = 0; frame_list[0] = h->default_ref_list[0]; frame_list[1] = h->default_ref_list[1]; } if(h->slice_type_nos==FF_B_TYPE){ int list; int len[2]; int short_len[2]; int out_i; int limit= INT_MIN; /* sort frame according to POC in B slice */ for(out_i=0; out_i<h->short_ref_count; out_i++){ int best_i=INT_MIN; int best_poc=INT_MAX; for(i=0; i<h->short_ref_count; i++){ const int poc= h->short_ref[i]->poc; if(poc > limit && poc < best_poc){ best_poc= poc; best_i= i; } } assert(best_i != INT_MIN); limit= best_poc; sorted_short_ref[out_i]= *h->short_ref[best_i]; tprintf(h->s.avctx, "sorted poc: %d->%d poc:%d fn:%d\n", best_i, out_i, sorted_short_ref[out_i].poc, sorted_short_ref[out_i].frame_num); if (-1 == smallest_poc_greater_than_current) { if (h->short_ref[best_i]->poc >= s->current_picture_ptr->poc) { smallest_poc_greater_than_current = out_i; } } } tprintf(h->s.avctx, "current poc: %d, smallest_poc_greater_than_current: %d\n", s->current_picture_ptr->poc, smallest_poc_greater_than_current); // find the largest POC for(list=0; list<2; list++){ int index = 0; int j= -99; int step= list ? -1 : 1; for(i=0; i<h->short_ref_count && index < h->ref_count[list]; i++, j+=step) { int sel; while(j<0 || j>= h->short_ref_count){ if(j != -99 && step == (list ? -1 : 1)) return -1; step = -step; j= smallest_poc_greater_than_current + (step>>1); } sel = sorted_short_ref[j].reference | structure_sel; if(sel != PICT_FRAME) continue; frame_list[list][index ]= sorted_short_ref[j]; frame_list[list][index++].pic_id= sorted_short_ref[j].frame_num; } short_len[list] = index; for(i = 0; i < 16 && index < h->ref_count[ list ]; i++){ int sel; if(h->long_ref[i] == NULL) continue; sel = h->long_ref[i]->reference | structure_sel; if(sel != PICT_FRAME) continue; frame_list[ list ][index ]= *h->long_ref[i]; frame_list[ list ][index++].pic_id= i; } len[list] = index; } for(list=0; list<2; list++){ if (FIELD_PICTURE) len[list] = split_field_ref_list(h->default_ref_list[list], h->ref_count[list], frame_list[list], len[list], s->picture_structure, short_len[list]); // swap the two first elements of L1 when L0 and L1 are identical if(list && len[0] > 1 && len[0] == len[1]) for(i=0; h->default_ref_list[0][i].data[0] == h->default_ref_list[1][i].data[0]; i++) if(i == len[0]){ FFSWAP(Picture, h->default_ref_list[1][0], h->default_ref_list[1][1]); break; } if(len[list] < h->ref_count[ list ]) memset(&h->default_ref_list[list][len[list]], 0, sizeof(Picture)*(h->ref_count[ list ] - len[list])); } }else{ int index=0; int short_len; for(i=0; i<h->short_ref_count; i++){ int sel; sel = h->short_ref[i]->reference | structure_sel; if(sel != PICT_FRAME) continue; frame_list[0][index ]= *h->short_ref[i]; frame_list[0][index++].pic_id= h->short_ref[i]->frame_num; } short_len = index; for(i = 0; i < 16; i++){ int sel; if(h->long_ref[i] == NULL) continue; sel = h->long_ref[i]->reference | structure_sel; if(sel != PICT_FRAME) continue; frame_list[0][index ]= *h->long_ref[i]; frame_list[0][index++].pic_id= i; } if (FIELD_PICTURE) index = split_field_ref_list(h->default_ref_list[0], h->ref_count[0], frame_list[0], index, s->picture_structure, short_len); if(index < h->ref_count[0]) memset(&h->default_ref_list[0][index], 0, sizeof(Picture)*(h->ref_count[0] - index)); } #ifdef TRACE for (i=0; i<h->ref_count[0]; i++) { 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]); } if(h->slice_type_nos==FF_B_TYPE){ for (i=0; i<h->ref_count[1]; i++) { 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]); } } #endif return 0; }