| /* |
| * H.26L/H.264/AVC/JVT/14496-10/... reference picture handling |
| * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * H.264 / AVC / MPEG4 part10 reference picture handling. |
| * @author Michael Niedermayer <michaelni@gmx.at> |
| */ |
| |
| #include "libavutil/avassert.h" |
| #include "internal.h" |
| #include "dsputil.h" |
| #include "avcodec.h" |
| #include "h264.h" |
| #include "golomb.h" |
| |
| //#undef NDEBUG |
| #include <assert.h> |
| |
| |
| static void pic_as_field(Picture *pic, const int parity){ |
| int i; |
| for (i = 0; i < 4; ++i) { |
| if (parity == PICT_BOTTOM_FIELD) |
| pic->f.data[i] += pic->f.linesize[i]; |
| pic->f.reference = parity; |
| pic->f.linesize[i] *= 2; |
| } |
| pic->poc= pic->field_poc[parity == PICT_BOTTOM_FIELD]; |
| } |
| |
| static int split_field_copy(Picture *dest, Picture *src, |
| int parity, int id_add){ |
| int match = !!(src->f.reference & parity); |
| |
| if (match) { |
| *dest = *src; |
| if(parity != PICT_FRAME){ |
| pic_as_field(dest, parity); |
| dest->pic_id *= 2; |
| dest->pic_id += id_add; |
| } |
| } |
| |
| return match; |
| } |
| |
| static int build_def_list(Picture *def, Picture **in, int len, int is_long, int sel){ |
| int i[2]={0}; |
| int index=0; |
| |
| while(i[0]<len || i[1]<len){ |
| while (i[0] < len && !(in[ i[0] ] && (in[ i[0] ]->f.reference & sel))) |
| i[0]++; |
| while (i[1] < len && !(in[ i[1] ] && (in[ i[1] ]->f.reference & (sel^3)))) |
| i[1]++; |
| if(i[0] < len){ |
| in[ i[0] ]->pic_id= is_long ? i[0] : in[ i[0] ]->frame_num; |
| split_field_copy(&def[index++], in[ i[0]++ ], sel , 1); |
| } |
| if(i[1] < len){ |
| in[ i[1] ]->pic_id= is_long ? i[1] : in[ i[1] ]->frame_num; |
| split_field_copy(&def[index++], in[ i[1]++ ], sel^3, 0); |
| } |
| } |
| |
| return index; |
| } |
| |
| static int add_sorted(Picture **sorted, Picture **src, int len, int limit, int dir){ |
| int i, best_poc; |
| int out_i= 0; |
| |
| for(;;){ |
| best_poc= dir ? INT_MIN : INT_MAX; |
| |
| for(i=0; i<len; i++){ |
| const int poc= src[i]->poc; |
| if(((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)){ |
| best_poc= poc; |
| sorted[out_i]= src[i]; |
| } |
| } |
| if(best_poc == (dir ? INT_MIN : INT_MAX)) |
| break; |
| limit= sorted[out_i++]->poc - dir; |
| } |
| return out_i; |
| } |
| |
| int ff_h264_fill_default_ref_list(H264Context *h){ |
| MpegEncContext * const s = &h->s; |
| int i, len; |
| |
| if(h->slice_type_nos==AV_PICTURE_TYPE_B){ |
| Picture *sorted[32]; |
| int cur_poc, list; |
| int lens[2]; |
| |
| if(FIELD_PICTURE) |
| cur_poc= s->current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ]; |
| else |
| cur_poc= s->current_picture_ptr->poc; |
| |
| for(list= 0; list<2; list++){ |
| len= add_sorted(sorted , h->short_ref, h->short_ref_count, cur_poc, 1^list); |
| len+=add_sorted(sorted+len, h->short_ref, h->short_ref_count, cur_poc, 0^list); |
| assert(len<=32); |
| len= build_def_list(h->default_ref_list[list] , sorted , len, 0, s->picture_structure); |
| len+=build_def_list(h->default_ref_list[list]+len, h->long_ref, 16 , 1, s->picture_structure); |
| assert(len<=32); |
| |
| if(len < h->ref_count[list]) |
| memset(&h->default_ref_list[list][len], 0, sizeof(Picture)*(h->ref_count[list] - len)); |
| lens[list]= len; |
| } |
| |
| if(lens[0] == lens[1] && lens[1] > 1){ |
| 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++); |
| if(i == lens[0]) |
| FFSWAP(Picture, h->default_ref_list[1][0], h->default_ref_list[1][1]); |
| } |
| }else{ |
| len = build_def_list(h->default_ref_list[0] , h->short_ref, h->short_ref_count, 0, s->picture_structure); |
| len+= build_def_list(h->default_ref_list[0]+len, h-> long_ref, 16 , 1, s->picture_structure); |
| assert(len <= 32); |
| if(len < h->ref_count[0]) |
| memset(&h->default_ref_list[0][len], 0, sizeof(Picture)*(h->ref_count[0] - len)); |
| } |
| #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==AV_PICTURE_TYPE_B){ |
| 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; |
| } |
| |
| static void print_short_term(H264Context *h); |
| static void print_long_term(H264Context *h); |
| |
| /** |
| * Extract structure information about the picture described by pic_num in |
| * the current decoding context (frame or field). Note that pic_num is |
| * picture number without wrapping (so, 0<=pic_num<max_pic_num). |
| * @param pic_num picture number for which to extract structure information |
| * @param structure one of PICT_XXX describing structure of picture |
| * with pic_num |
| * @return frame number (short term) or long term index of picture |
| * described by pic_num |
| */ |
| static int pic_num_extract(H264Context *h, int pic_num, int *structure){ |
| MpegEncContext * const s = &h->s; |
| |
| *structure = s->picture_structure; |
| if(FIELD_PICTURE){ |
| if (!(pic_num & 1)) |
| /* opposite field */ |
| *structure ^= PICT_FRAME; |
| pic_num >>= 1; |
| } |
| |
| return pic_num; |
| } |
| |
| int ff_h264_decode_ref_pic_list_reordering(H264Context *h){ |
| MpegEncContext * const s = &h->s; |
| int list, index, pic_structure; |
| |
| print_short_term(h); |
| print_long_term(h); |
| |
| for(list=0; list<h->list_count; list++){ |
| memcpy(h->ref_list[list], h->default_ref_list[list], sizeof(Picture)*h->ref_count[list]); |
| |
| if(get_bits1(&s->gb)){ |
| int pred= h->curr_pic_num; |
| |
| for(index=0; ; index++){ |
| unsigned int reordering_of_pic_nums_idc= get_ue_golomb_31(&s->gb); |
| unsigned int pic_id; |
| int i; |
| Picture *ref = NULL; |
| |
| if(reordering_of_pic_nums_idc==3) |
| break; |
| |
| if(index >= h->ref_count[list]){ |
| av_log(h->s.avctx, AV_LOG_ERROR, "reference count overflow\n"); |
| return -1; |
| } |
| |
| if(reordering_of_pic_nums_idc<3){ |
| if(reordering_of_pic_nums_idc<2){ |
| const unsigned int abs_diff_pic_num= get_ue_golomb(&s->gb) + 1; |
| int frame_num; |
| |
| if(abs_diff_pic_num > h->max_pic_num){ |
| av_log(h->s.avctx, AV_LOG_ERROR, "abs_diff_pic_num overflow\n"); |
| return -1; |
| } |
| |
| if(reordering_of_pic_nums_idc == 0) pred-= abs_diff_pic_num; |
| else pred+= abs_diff_pic_num; |
| pred &= h->max_pic_num - 1; |
| |
| frame_num = pic_num_extract(h, pred, &pic_structure); |
| |
| for(i= h->short_ref_count-1; i>=0; i--){ |
| ref = h->short_ref[i]; |
| assert(ref->f.reference); |
| assert(!ref->long_ref); |
| if( |
| ref->frame_num == frame_num && |
| (ref->f.reference & pic_structure) |
| ) |
| break; |
| } |
| if(i>=0) |
| ref->pic_id= pred; |
| }else{ |
| int long_idx; |
| pic_id= get_ue_golomb(&s->gb); //long_term_pic_idx |
| |
| long_idx= pic_num_extract(h, pic_id, &pic_structure); |
| |
| if(long_idx>31){ |
| av_log(h->s.avctx, AV_LOG_ERROR, "long_term_pic_idx overflow\n"); |
| return -1; |
| } |
| ref = h->long_ref[long_idx]; |
| assert(!(ref && !ref->f.reference)); |
| if (ref && (ref->f.reference & pic_structure)) { |
| ref->pic_id= pic_id; |
| assert(ref->long_ref); |
| i=0; |
| }else{ |
| i=-1; |
| } |
| } |
| |
| if (i < 0) { |
| av_log(h->s.avctx, AV_LOG_ERROR, "reference picture missing during reorder\n"); |
| memset(&h->ref_list[list][index], 0, sizeof(Picture)); //FIXME |
| } else { |
| for(i=index; i+1<h->ref_count[list]; i++){ |
| if(ref->long_ref == h->ref_list[list][i].long_ref && ref->pic_id == h->ref_list[list][i].pic_id) |
| break; |
| } |
| for(; i > index; i--){ |
| h->ref_list[list][i]= h->ref_list[list][i-1]; |
| } |
| h->ref_list[list][index]= *ref; |
| if (FIELD_PICTURE){ |
| pic_as_field(&h->ref_list[list][index], pic_structure); |
| } |
| } |
| }else{ |
| av_log(h->s.avctx, AV_LOG_ERROR, "illegal reordering_of_pic_nums_idc\n"); |
| return -1; |
| } |
| } |
| } |
| } |
| for(list=0; list<h->list_count; list++){ |
| for(index= 0; index < h->ref_count[list]; index++){ |
| if (!h->ref_list[list][index].f.data[0]) { |
| av_log(h->s.avctx, AV_LOG_ERROR, "Missing reference picture\n"); |
| if (h->default_ref_list[list][0].f.data[0]) |
| h->ref_list[list][index]= h->default_ref_list[list][0]; |
| else |
| return -1; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| void ff_h264_fill_mbaff_ref_list(H264Context *h){ |
| int list, i, j; |
| for(list=0; list<h->list_count; list++){ |
| for(i=0; i<h->ref_count[list]; i++){ |
| Picture *frame = &h->ref_list[list][i]; |
| Picture *field = &h->ref_list[list][16+2*i]; |
| field[0] = *frame; |
| for(j=0; j<3; j++) |
| field[0].f.linesize[j] <<= 1; |
| field[0].f.reference = PICT_TOP_FIELD; |
| field[0].poc= field[0].field_poc[0]; |
| field[1] = field[0]; |
| for(j=0; j<3; j++) |
| field[1].f.data[j] += frame->f.linesize[j]; |
| field[1].f.reference = PICT_BOTTOM_FIELD; |
| field[1].poc= field[1].field_poc[1]; |
| |
| h->luma_weight[16+2*i][list][0] = h->luma_weight[16+2*i+1][list][0] = h->luma_weight[i][list][0]; |
| h->luma_weight[16+2*i][list][1] = h->luma_weight[16+2*i+1][list][1] = h->luma_weight[i][list][1]; |
| for(j=0; j<2; j++){ |
| 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]; |
| 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]; |
| } |
| } |
| } |
| } |
| |
| /** |
| * Mark a picture as no longer needed for reference. The refmask |
| * argument allows unreferencing of individual fields or the whole frame. |
| * If the picture becomes entirely unreferenced, but is being held for |
| * display purposes, it is marked as such. |
| * @param refmask mask of fields to unreference; the mask is bitwise |
| * anded with the reference marking of pic |
| * @return non-zero if pic becomes entirely unreferenced (except possibly |
| * for display purposes) zero if one of the fields remains in |
| * reference |
| */ |
| static inline int unreference_pic(H264Context *h, Picture *pic, int refmask){ |
| int i; |
| if (pic->f.reference &= refmask) { |
| return 0; |
| } else { |
| for(i = 0; h->delayed_pic[i]; i++) |
| if(pic == h->delayed_pic[i]){ |
| pic->f.reference = DELAYED_PIC_REF; |
| break; |
| } |
| return 1; |
| } |
| } |
| |
| /** |
| * Find a Picture in the short term reference list by frame number. |
| * @param frame_num frame number to search for |
| * @param idx the index into h->short_ref where returned picture is found |
| * undefined if no picture found. |
| * @return pointer to the found picture, or NULL if no pic with the provided |
| * frame number is found |
| */ |
| static Picture * find_short(H264Context *h, int frame_num, int *idx){ |
| MpegEncContext * const s = &h->s; |
| int i; |
| |
| for(i=0; i<h->short_ref_count; i++){ |
| Picture *pic= h->short_ref[i]; |
| if(s->avctx->debug&FF_DEBUG_MMCO) |
| av_log(h->s.avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic); |
| if(pic->frame_num == frame_num) { |
| *idx = i; |
| return pic; |
| } |
| } |
| return NULL; |
| } |
| |
| /** |
| * Remove a picture from the short term reference list by its index in |
| * that list. This does no checking on the provided index; it is assumed |
| * to be valid. Other list entries are shifted down. |
| * @param i index into h->short_ref of picture to remove. |
| */ |
| static void remove_short_at_index(H264Context *h, int i){ |
| assert(i >= 0 && i < h->short_ref_count); |
| h->short_ref[i]= NULL; |
| if (--h->short_ref_count) |
| memmove(&h->short_ref[i], &h->short_ref[i+1], (h->short_ref_count - i)*sizeof(Picture*)); |
| } |
| |
| /** |
| * |
| * @return the removed picture or NULL if an error occurs |
| */ |
| static Picture * remove_short(H264Context *h, int frame_num, int ref_mask){ |
| MpegEncContext * const s = &h->s; |
| Picture *pic; |
| int i; |
| |
| if(s->avctx->debug&FF_DEBUG_MMCO) |
| av_log(h->s.avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count); |
| |
| pic = find_short(h, frame_num, &i); |
| if (pic){ |
| if(unreference_pic(h, pic, ref_mask)) |
| remove_short_at_index(h, i); |
| } |
| |
| return pic; |
| } |
| |
| /** |
| * Remove a picture from the long term reference list by its index in |
| * that list. |
| * @return the removed picture or NULL if an error occurs |
| */ |
| static Picture * remove_long(H264Context *h, int i, int ref_mask){ |
| Picture *pic; |
| |
| pic= h->long_ref[i]; |
| if (pic){ |
| if(unreference_pic(h, pic, ref_mask)){ |
| assert(h->long_ref[i]->long_ref == 1); |
| h->long_ref[i]->long_ref= 0; |
| h->long_ref[i]= NULL; |
| h->long_ref_count--; |
| } |
| } |
| |
| return pic; |
| } |
| |
| void ff_h264_remove_all_refs(H264Context *h){ |
| int i; |
| |
| for(i=0; i<16; i++){ |
| remove_long(h, i, 0); |
| } |
| assert(h->long_ref_count==0); |
| |
| for(i=0; i<h->short_ref_count; i++){ |
| unreference_pic(h, h->short_ref[i], 0); |
| h->short_ref[i]= NULL; |
| } |
| h->short_ref_count=0; |
| } |
| |
| /** |
| * print short term list |
| */ |
| static void print_short_term(H264Context *h) { |
| uint32_t i; |
| if(h->s.avctx->debug&FF_DEBUG_MMCO) { |
| av_log(h->s.avctx, AV_LOG_DEBUG, "short term list:\n"); |
| for(i=0; i<h->short_ref_count; i++){ |
| Picture *pic= h->short_ref[i]; |
| av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", |
| i, pic->frame_num, pic->poc, pic->f.data[0]); |
| } |
| } |
| } |
| |
| /** |
| * print long term list |
| */ |
| static void print_long_term(H264Context *h) { |
| uint32_t i; |
| if(h->s.avctx->debug&FF_DEBUG_MMCO) { |
| av_log(h->s.avctx, AV_LOG_DEBUG, "long term list:\n"); |
| for(i = 0; i < 16; i++){ |
| Picture *pic= h->long_ref[i]; |
| if (pic) { |
| av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", |
| i, pic->frame_num, pic->poc, pic->f.data[0]); |
| } |
| } |
| } |
| } |
| |
| void ff_generate_sliding_window_mmcos(H264Context *h) { |
| MpegEncContext * const s = &h->s; |
| |
| h->mmco_index= 0; |
| if(h->short_ref_count && h->long_ref_count + h->short_ref_count >= h->sps.ref_frame_count && |
| !(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->f.reference)) { |
| h->mmco[0].opcode= MMCO_SHORT2UNUSED; |
| h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num; |
| h->mmco_index= 1; |
| if (FIELD_PICTURE) { |
| h->mmco[0].short_pic_num *= 2; |
| h->mmco[1].opcode= MMCO_SHORT2UNUSED; |
| h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1; |
| h->mmco_index= 2; |
| } |
| } |
| } |
| |
| int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){ |
| MpegEncContext * const s = &h->s; |
| int i, av_uninit(j); |
| int current_ref_assigned=0, err=0; |
| Picture *av_uninit(pic); |
| |
| if((s->avctx->debug&FF_DEBUG_MMCO) && mmco_count==0) |
| av_log(h->s.avctx, AV_LOG_DEBUG, "no mmco here\n"); |
| |
| for(i=0; i<mmco_count; i++){ |
| int av_uninit(structure), av_uninit(frame_num); |
| if(s->avctx->debug&FF_DEBUG_MMCO) |
| 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); |
| |
| if( mmco[i].opcode == MMCO_SHORT2UNUSED |
| || mmco[i].opcode == MMCO_SHORT2LONG){ |
| frame_num = pic_num_extract(h, mmco[i].short_pic_num, &structure); |
| pic = find_short(h, frame_num, &j); |
| if(!pic){ |
| if(mmco[i].opcode != MMCO_SHORT2LONG || !h->long_ref[mmco[i].long_arg] |
| || h->long_ref[mmco[i].long_arg]->frame_num != frame_num) { |
| av_log(h->s.avctx, AV_LOG_ERROR, "mmco: unref short failure\n"); |
| err = AVERROR_INVALIDDATA; |
| } |
| continue; |
| } |
| } |
| |
| switch(mmco[i].opcode){ |
| case MMCO_SHORT2UNUSED: |
| if(s->avctx->debug&FF_DEBUG_MMCO) |
| 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); |
| remove_short(h, frame_num, structure ^ PICT_FRAME); |
| break; |
| case MMCO_SHORT2LONG: |
| if (h->long_ref[mmco[i].long_arg] != pic) |
| remove_long(h, mmco[i].long_arg, 0); |
| |
| remove_short_at_index(h, j); |
| h->long_ref[ mmco[i].long_arg ]= pic; |
| if (h->long_ref[ mmco[i].long_arg ]){ |
| h->long_ref[ mmco[i].long_arg ]->long_ref=1; |
| h->long_ref_count++; |
| } |
| break; |
| case MMCO_LONG2UNUSED: |
| j = pic_num_extract(h, mmco[i].long_arg, &structure); |
| pic = h->long_ref[j]; |
| if (pic) { |
| remove_long(h, j, structure ^ PICT_FRAME); |
| } else if(s->avctx->debug&FF_DEBUG_MMCO) |
| av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref long failure\n"); |
| break; |
| case MMCO_LONG: |
| // Comment below left from previous code as it is an interresting note. |
| /* First field in pair is in short term list or |
| * at a different long term index. |
| * This is not allowed; see 7.4.3.3, notes 2 and 3. |
| * Report the problem and keep the pair where it is, |
| * and mark this field valid. |
| */ |
| |
| if (h->long_ref[mmco[i].long_arg] != s->current_picture_ptr) { |
| remove_long(h, mmco[i].long_arg, 0); |
| |
| h->long_ref[ mmco[i].long_arg ]= s->current_picture_ptr; |
| h->long_ref[ mmco[i].long_arg ]->long_ref=1; |
| h->long_ref_count++; |
| } |
| |
| s->current_picture_ptr->f.reference |= s->picture_structure; |
| current_ref_assigned=1; |
| break; |
| case MMCO_SET_MAX_LONG: |
| assert(mmco[i].long_arg <= 16); |
| // just remove the long term which index is greater than new max |
| for(j = mmco[i].long_arg; j<16; j++){ |
| remove_long(h, j, 0); |
| } |
| break; |
| case MMCO_RESET: |
| while(h->short_ref_count){ |
| remove_short(h, h->short_ref[0]->frame_num, 0); |
| } |
| for(j = 0; j < 16; j++) { |
| remove_long(h, j, 0); |
| } |
| h->frame_num= |
| s->current_picture_ptr->frame_num= 0; |
| h->mmco_reset = 1; |
| s->current_picture_ptr->mmco_reset=1; |
| for (j = 0; j < MAX_DELAYED_PIC_COUNT; j++) |
| h->last_pocs[j] = INT_MIN; |
| break; |
| default: assert(0); |
| } |
| } |
| |
| if (!current_ref_assigned) { |
| /* Second field of complementary field pair; the first field of |
| * which is already referenced. If short referenced, it |
| * should be first entry in short_ref. If not, it must exist |
| * in long_ref; trying to put it on the short list here is an |
| * error in the encoded bit stream (ref: 7.4.3.3, NOTE 2 and 3). |
| */ |
| if (h->short_ref_count && h->short_ref[0] == s->current_picture_ptr) { |
| /* Just mark the second field valid */ |
| s->current_picture_ptr->f.reference = PICT_FRAME; |
| } else if (s->current_picture_ptr->long_ref) { |
| av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term reference " |
| "assignment for second field " |
| "in complementary field pair " |
| "(first field is long term)\n"); |
| err = AVERROR_INVALIDDATA; |
| } else { |
| pic= remove_short(h, s->current_picture_ptr->frame_num, 0); |
| if(pic){ |
| av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n"); |
| err = AVERROR_INVALIDDATA; |
| } |
| |
| if(h->short_ref_count) |
| memmove(&h->short_ref[1], &h->short_ref[0], h->short_ref_count*sizeof(Picture*)); |
| |
| h->short_ref[0]= s->current_picture_ptr; |
| h->short_ref_count++; |
| s->current_picture_ptr->f.reference |= s->picture_structure; |
| } |
| } |
| |
| if (h->long_ref_count + h->short_ref_count > FFMAX(h->sps.ref_frame_count, 1)){ |
| |
| /* We have too many reference frames, probably due to corrupted |
| * stream. Need to discard one frame. Prevents overrun of the |
| * short_ref and long_ref buffers. |
| */ |
| av_log(h->s.avctx, AV_LOG_ERROR, |
| "number of reference frames (%d+%d) exceeds max (%d; probably " |
| "corrupt input), discarding one\n", |
| h->long_ref_count, h->short_ref_count, h->sps.ref_frame_count); |
| err = AVERROR_INVALIDDATA; |
| |
| if (h->long_ref_count && !h->short_ref_count) { |
| for (i = 0; i < 16; ++i) |
| if (h->long_ref[i]) |
| break; |
| |
| assert(i < 16); |
| remove_long(h, i, 0); |
| } else { |
| pic = h->short_ref[h->short_ref_count - 1]; |
| remove_short(h, pic->frame_num, 0); |
| } |
| } |
| |
| print_short_term(h); |
| print_long_term(h); |
| |
| if(err >= 0 && h->long_ref_count==0 && h->short_ref_count<=2 && h->pps.ref_count[0]<=1 + (s->picture_structure != PICT_FRAME) && s->current_picture_ptr->f.pict_type == AV_PICTURE_TYPE_I){ |
| s->current_picture_ptr->sync |= 1; |
| if(!h->s.avctx->has_b_frames) |
| h->sync = 2; |
| } |
| |
| return (h->s.avctx->err_recognition & AV_EF_EXPLODE) ? err : 0; |
| } |
| |
| int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb){ |
| MpegEncContext * const s = &h->s; |
| int i; |
| |
| h->mmco_index= 0; |
| if(h->nal_unit_type == NAL_IDR_SLICE){ //FIXME fields |
| s->broken_link= get_bits1(gb) -1; |
| if(get_bits1(gb)){ |
| h->mmco[0].opcode= MMCO_LONG; |
| h->mmco[0].long_arg= 0; |
| h->mmco_index= 1; |
| } |
| }else{ |
| if(get_bits1(gb)){ // adaptive_ref_pic_marking_mode_flag |
| for(i= 0; i<MAX_MMCO_COUNT; i++) { |
| MMCOOpcode opcode= get_ue_golomb_31(gb); |
| |
| h->mmco[i].opcode= opcode; |
| if(opcode==MMCO_SHORT2UNUSED || opcode==MMCO_SHORT2LONG){ |
| h->mmco[i].short_pic_num= (h->curr_pic_num - get_ue_golomb(gb) - 1) & (h->max_pic_num - 1); |
| /* if(h->mmco[i].short_pic_num >= h->short_ref_count || h->short_ref[ h->mmco[i].short_pic_num ] == NULL){ |
| av_log(s->avctx, AV_LOG_ERROR, "illegal short ref in memory management control operation %d\n", mmco); |
| return -1; |
| }*/ |
| } |
| if(opcode==MMCO_SHORT2LONG || opcode==MMCO_LONG2UNUSED || opcode==MMCO_LONG || opcode==MMCO_SET_MAX_LONG){ |
| unsigned int long_arg= get_ue_golomb_31(gb); |
| if(long_arg >= 32 || (long_arg >= 16 && !(opcode == MMCO_SET_MAX_LONG && long_arg == 16) && !(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE))){ |
| av_log(h->s.avctx, AV_LOG_ERROR, "illegal long ref in memory management control operation %d\n", opcode); |
| return -1; |
| } |
| h->mmco[i].long_arg= long_arg; |
| } |
| |
| if(opcode > (unsigned)MMCO_LONG){ |
| av_log(h->s.avctx, AV_LOG_ERROR, "illegal memory management control operation %d\n", opcode); |
| return -1; |
| } |
| if(opcode == MMCO_END) |
| break; |
| } |
| h->mmco_index= i; |
| }else{ |
| ff_generate_sliding_window_mmcos(h); |
| } |
| } |
| |
| return 0; |
| } |
