LCOV - code coverage report
Current view: top level - libavcodec - hevc_refs.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 261 297 87.9 %
Date: 2018-05-20 11:54:08 Functions: 15 16 93.8 %

          Line data    Source code
       1             : /*
       2             :  * HEVC video decoder
       3             :  *
       4             :  * Copyright (C) 2012 - 2013 Guillaume Martres
       5             :  * Copyright (C) 2012 - 2013 Gildas Cocherel
       6             :  *
       7             :  * This file is part of FFmpeg.
       8             :  *
       9             :  * FFmpeg is free software; you can redistribute it and/or
      10             :  * modify it under the terms of the GNU Lesser General Public
      11             :  * License as published by the Free Software Foundation; either
      12             :  * version 2.1 of the License, or (at your option) any later version.
      13             :  *
      14             :  * FFmpeg is distributed in the hope that it will be useful,
      15             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      16             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      17             :  * Lesser General Public License for more details.
      18             :  *
      19             :  * You should have received a copy of the GNU Lesser General Public
      20             :  * License along with FFmpeg; if not, write to the Free Software
      21             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      22             :  */
      23             : 
      24             : #include "libavutil/avassert.h"
      25             : #include "libavutil/pixdesc.h"
      26             : 
      27             : #include "internal.h"
      28             : #include "thread.h"
      29             : #include "hevc.h"
      30             : #include "hevcdec.h"
      31             : 
      32      334686 : void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags)
      33             : {
      34             :     /* frame->frame can be NULL if context init failed */
      35      334686 :     if (!frame->frame || !frame->frame->buf[0])
      36      270024 :         return;
      37             : 
      38       64662 :     frame->flags &= ~flags;
      39       64662 :     if (!frame->flags) {
      40        9485 :         ff_thread_release_buffer(s->avctx, &frame->tf);
      41             : 
      42        9485 :         av_buffer_unref(&frame->tab_mvf_buf);
      43        9485 :         frame->tab_mvf = NULL;
      44             : 
      45        9485 :         av_buffer_unref(&frame->rpl_buf);
      46        9485 :         av_buffer_unref(&frame->rpl_tab_buf);
      47        9485 :         frame->rpl_tab    = NULL;
      48        9485 :         frame->refPicList = NULL;
      49             : 
      50        9485 :         frame->collocated_ref = NULL;
      51             : 
      52        9485 :         av_buffer_unref(&frame->hwaccel_priv_buf);
      53        9485 :         frame->hwaccel_picture_private = NULL;
      54             :     }
      55             : }
      56             : 
      57     4556223 : RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *ref, int x0, int y0)
      58             : {
      59     4556223 :     int x_cb         = x0 >> s->ps.sps->log2_ctb_size;
      60     4556223 :     int y_cb         = y0 >> s->ps.sps->log2_ctb_size;
      61     4556223 :     int pic_width_cb = s->ps.sps->ctb_width;
      62     4556223 :     int ctb_addr_ts  = s->ps.pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb];
      63     4556223 :     return (RefPicList *)ref->rpl_tab[ctb_addr_ts];
      64             : }
      65             : 
      66         721 : void ff_hevc_clear_refs(HEVCContext *s)
      67             : {
      68             :     int i;
      69       23793 :     for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
      70       23072 :         ff_hevc_unref_frame(s, &s->DPB[i],
      71             :                             HEVC_FRAME_FLAG_SHORT_REF |
      72             :                             HEVC_FRAME_FLAG_LONG_REF);
      73         721 : }
      74             : 
      75           0 : void ff_hevc_flush_dpb(HEVCContext *s)
      76             : {
      77             :     int i;
      78           0 :     for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
      79           0 :         ff_hevc_unref_frame(s, &s->DPB[i], ~0);
      80           0 : }
      81             : 
      82        9485 : static HEVCFrame *alloc_frame(HEVCContext *s)
      83             : {
      84             :     int i, j, ret;
      85       67092 :     for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
      86       33546 :         HEVCFrame *frame = &s->DPB[i];
      87       33546 :         if (frame->frame->buf[0])
      88       24061 :             continue;
      89             : 
      90        9485 :         ret = ff_thread_get_buffer(s->avctx, &frame->tf,
      91             :                                    AV_GET_BUFFER_FLAG_REF);
      92        9485 :         if (ret < 0)
      93           0 :             return NULL;
      94             : 
      95        9485 :         frame->rpl_buf = av_buffer_allocz(s->pkt.nb_nals * sizeof(RefPicListTab));
      96        9485 :         if (!frame->rpl_buf)
      97           0 :             goto fail;
      98             : 
      99        9485 :         frame->tab_mvf_buf = av_buffer_pool_get(s->tab_mvf_pool);
     100        9485 :         if (!frame->tab_mvf_buf)
     101           0 :             goto fail;
     102        9485 :         frame->tab_mvf = (MvField *)frame->tab_mvf_buf->data;
     103             : 
     104        9485 :         frame->rpl_tab_buf = av_buffer_pool_get(s->rpl_tab_pool);
     105        9485 :         if (!frame->rpl_tab_buf)
     106           0 :             goto fail;
     107        9485 :         frame->rpl_tab   = (RefPicListTab **)frame->rpl_tab_buf->data;
     108        9485 :         frame->ctb_count = s->ps.sps->ctb_width * s->ps.sps->ctb_height;
     109     1376232 :         for (j = 0; j < frame->ctb_count; j++)
     110     1366747 :             frame->rpl_tab[j] = (RefPicListTab *)frame->rpl_buf->data;
     111             : 
     112        9485 :         frame->frame->top_field_first  = s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD;
     113        9485 :         frame->frame->interlaced_frame = (s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD) || (s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_BOTTOM_FIELD);
     114             : 
     115        9485 :         if (s->avctx->hwaccel) {
     116           0 :             const AVHWAccel *hwaccel = s->avctx->hwaccel;
     117           0 :             av_assert0(!frame->hwaccel_picture_private);
     118           0 :             if (hwaccel->frame_priv_data_size) {
     119           0 :                 frame->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
     120           0 :                 if (!frame->hwaccel_priv_buf)
     121           0 :                     goto fail;
     122           0 :                 frame->hwaccel_picture_private = frame->hwaccel_priv_buf->data;
     123             :             }
     124             :         }
     125             : 
     126        9485 :         return frame;
     127           0 : fail:
     128           0 :         ff_hevc_unref_frame(s, frame, ~0);
     129           0 :         return NULL;
     130             :     }
     131           0 :     av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
     132           0 :     return NULL;
     133             : }
     134             : 
     135        9443 : int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc)
     136             : {
     137             :     HEVCFrame *ref;
     138             :     int i;
     139             : 
     140             :     /* check that this POC doesn't already exist */
     141      311619 :     for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
     142      302176 :         HEVCFrame *frame = &s->DPB[i];
     143             : 
     144      347426 :         if (frame->frame->buf[0] && frame->sequence == s->seq_decode &&
     145       45250 :             frame->poc == poc) {
     146           0 :             av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
     147             :                    poc);
     148           0 :             return AVERROR_INVALIDDATA;
     149             :         }
     150             :     }
     151             : 
     152        9443 :     ref = alloc_frame(s);
     153        9443 :     if (!ref)
     154           0 :         return AVERROR(ENOMEM);
     155             : 
     156        9443 :     *frame = ref->frame;
     157        9443 :     s->ref = ref;
     158             : 
     159        9443 :     if (s->sh.pic_output_flag)
     160        9437 :         ref->flags = HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_SHORT_REF;
     161             :     else
     162           6 :         ref->flags = HEVC_FRAME_FLAG_SHORT_REF;
     163             : 
     164        9443 :     ref->poc      = poc;
     165        9443 :     ref->sequence = s->seq_decode;
     166        9443 :     ref->frame->crop_left   = s->ps.sps->output_window.left_offset;
     167        9443 :     ref->frame->crop_right  = s->ps.sps->output_window.right_offset;
     168        9443 :     ref->frame->crop_top    = s->ps.sps->output_window.top_offset;
     169        9443 :     ref->frame->crop_bottom = s->ps.sps->output_window.bottom_offset;
     170             : 
     171        9443 :     return 0;
     172             : }
     173             : 
     174       10642 : int ff_hevc_output_frame(HEVCContext *s, AVFrame *out, int flush)
     175             : {
     176         735 :     do {
     177       10642 :         int nb_output = 0;
     178       10642 :         int min_poc   = INT_MAX;
     179             :         int i, min_idx, ret;
     180             : 
     181       10642 :         if (s->sh.no_output_of_prior_pics_flag == 1 && s->no_rasl_output_flag == 1) {
     182        1155 :             for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
     183        1120 :                 HEVCFrame *frame = &s->DPB[i];
     184        1776 :                 if (!(frame->flags & HEVC_FRAME_FLAG_BUMPING) && frame->poc != s->poc &&
     185         656 :                         frame->sequence == s->seq_output) {
     186         176 :                     ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
     187             :                 }
     188             :             }
     189             :         }
     190             : 
     191      351186 :         for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
     192      340544 :             HEVCFrame *frame = &s->DPB[i];
     193      373221 :             if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
     194       32677 :                 frame->sequence == s->seq_output) {
     195       31792 :                 nb_output++;
     196       31792 :                 if (frame->poc < min_poc || nb_output == 1) {
     197       16746 :                     min_poc = frame->poc;
     198       16746 :                     min_idx = i;
     199             :                 }
     200             :             }
     201             :         }
     202             : 
     203             :         /* wait for more frames before output */
     204       20041 :         if (!flush && s->seq_output == s->seq_decode && s->ps.sps &&
     205        9399 :             nb_output <= s->ps.sps->temporal_layer[s->ps.sps->max_sub_layers - 1].num_reorder_pics)
     206         446 :             return 0;
     207             : 
     208       10196 :         if (nb_output) {
     209        9294 :             HEVCFrame *frame = &s->DPB[min_idx];
     210             : 
     211        9294 :             ret = av_frame_ref(out, frame->frame);
     212        9294 :             if (frame->flags & HEVC_FRAME_FLAG_BUMPING)
     213        2039 :                 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_BUMPING);
     214             :             else
     215        7255 :                 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
     216        9294 :             if (ret < 0)
     217           0 :                 return ret;
     218             : 
     219        9294 :             av_log(s->avctx, AV_LOG_DEBUG,
     220             :                    "Output frame with POC %d.\n", frame->poc);
     221        9294 :             return 1;
     222             :         }
     223             : 
     224         902 :         if (s->seq_output != s->seq_decode)
     225         735 :             s->seq_output = (s->seq_output + 1) & 0xff;
     226             :         else
     227         167 :             break;
     228             :     } while (1);
     229             : 
     230         167 :     return 0;
     231             : }
     232             : 
     233        8920 : void ff_hevc_bump_frame(HEVCContext *s)
     234             : {
     235        8920 :     int dpb = 0;
     236        8920 :     int min_poc = INT_MAX;
     237             :     int i;
     238             : 
     239      294360 :     for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
     240      285440 :         HEVCFrame *frame = &s->DPB[i];
     241      332897 :         if ((frame->flags) &&
     242       94798 :             frame->sequence == s->seq_output &&
     243       47341 :             frame->poc != s->poc) {
     244       38458 :             dpb++;
     245             :         }
     246             :     }
     247             : 
     248        8920 :     if (s->ps.sps && dpb >= s->ps.sps->temporal_layer[s->ps.sps->max_sub_layers - 1].max_dec_pic_buffering) {
     249       56001 :         for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
     250       54304 :             HEVCFrame *frame = &s->DPB[i];
     251       64622 :             if ((frame->flags) &&
     252       20636 :                 frame->sequence == s->seq_output &&
     253       10318 :                 frame->poc != s->poc) {
     254        8621 :                 if (frame->flags == HEVC_FRAME_FLAG_OUTPUT && frame->poc < min_poc) {
     255        1444 :                     min_poc = frame->poc;
     256             :                 }
     257             :             }
     258             :         }
     259             : 
     260       56001 :         for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
     261       54304 :             HEVCFrame *frame = &s->DPB[i];
     262       61094 :             if (frame->flags & HEVC_FRAME_FLAG_OUTPUT &&
     263       13580 :                 frame->sequence == s->seq_output &&
     264        6790 :                 frame->poc <= min_poc) {
     265        2789 :                 frame->flags |= HEVC_FRAME_FLAG_BUMPING;
     266             :             }
     267             :         }
     268             : 
     269        1697 :         dpb--;
     270             :     }
     271        8920 : }
     272             : 
     273       18369 : static int init_slice_rpl(HEVCContext *s)
     274             : {
     275       18369 :     HEVCFrame *frame = s->ref;
     276       18369 :     int ctb_count    = frame->ctb_count;
     277       18369 :     int ctb_addr_ts  = s->ps.pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
     278             :     int i;
     279             : 
     280       18369 :     if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
     281           0 :         return AVERROR_INVALIDDATA;
     282             : 
     283     1958069 :     for (i = ctb_addr_ts; i < ctb_count; i++)
     284     1939700 :         frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx;
     285             : 
     286       18369 :     frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];
     287             : 
     288       18369 :     return 0;
     289             : }
     290             : 
     291       18369 : int ff_hevc_slice_rpl(HEVCContext *s)
     292             : {
     293       18369 :     SliceHeader *sh = &s->sh;
     294             : 
     295       18369 :     uint8_t nb_list = sh->slice_type == HEVC_SLICE_B ? 2 : 1;
     296             :     uint8_t list_idx;
     297             :     int i, j, ret;
     298             : 
     299       18369 :     ret = init_slice_rpl(s);
     300       18369 :     if (ret < 0)
     301           0 :         return ret;
     302             : 
     303       36738 :     if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
     304       18369 :           s->rps[LT_CURR].nb_refs)) {
     305           0 :         av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
     306           0 :         return AVERROR_INVALIDDATA;
     307             :     }
     308             : 
     309       51398 :     for (list_idx = 0; list_idx < nb_list; list_idx++) {
     310       33029 :         RefPicList  rpl_tmp = { { 0 } };
     311       33029 :         RefPicList *rpl     = &s->ref->refPicList[list_idx];
     312             : 
     313             :         /* The order of the elements is
     314             :          * ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
     315             :          * ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */
     316       66058 :         int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
     317       33029 :                               list_idx ? ST_CURR_BEF : ST_CURR_AFT,
     318             :                               LT_CURR };
     319             : 
     320             :         /* concatenate the candidate lists for the current frame */
     321       99105 :         while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
     322      132188 :             for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
     323       99141 :                 RefPicList *rps = &s->rps[cand_lists[i]];
     324      218753 :                 for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < HEVC_MAX_REFS; j++) {
     325      119612 :                     rpl_tmp.list[rpl_tmp.nb_refs]       = rps->list[j];
     326      119612 :                     rpl_tmp.ref[rpl_tmp.nb_refs]        = rps->ref[j];
     327      119612 :                     rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2;
     328      119612 :                     rpl_tmp.nb_refs++;
     329             :                 }
     330             :             }
     331             :         }
     332             : 
     333             :         /* reorder the references if necessary */
     334       33029 :         if (sh->rpl_modification_flag[list_idx]) {
     335        6160 :             for (i = 0; i < sh->nb_refs[list_idx]; i++) {
     336        4333 :                 int idx = sh->list_entry_lx[list_idx][i];
     337             : 
     338        4333 :                 if (idx >= rpl_tmp.nb_refs) {
     339           0 :                     av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
     340           0 :                     return AVERROR_INVALIDDATA;
     341             :                 }
     342             : 
     343        4333 :                 rpl->list[i]       = rpl_tmp.list[idx];
     344        4333 :                 rpl->ref[i]        = rpl_tmp.ref[idx];
     345        4333 :                 rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
     346        4333 :                 rpl->nb_refs++;
     347             :             }
     348             :         } else {
     349       31202 :             memcpy(rpl, &rpl_tmp, sizeof(*rpl));
     350       31202 :             rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
     351             :         }
     352             : 
     353       51398 :         if (sh->collocated_list == list_idx &&
     354       18369 :             sh->collocated_ref_idx < rpl->nb_refs)
     355       18369 :             s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx];
     356             :     }
     357             : 
     358       18369 :     return 0;
     359             : }
     360             : 
     361       35001 : static HEVCFrame *find_ref_idx(HEVCContext *s, int poc)
     362             : {
     363             :     int i;
     364       35001 :     int LtMask = (1 << s->ps.sps->log2_max_poc_lsb) - 1;
     365             : 
     366      260592 :     for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
     367      256717 :         HEVCFrame *ref = &s->DPB[i];
     368      256717 :         if (ref->frame->buf[0] && (ref->sequence == s->seq_decode)) {
     369      155744 :             if ((ref->poc & LtMask) == poc)
     370       31126 :                 return ref;
     371             :         }
     372             :     }
     373             : 
     374       18880 :     for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
     375       18838 :         HEVCFrame *ref = &s->DPB[i];
     376       18838 :         if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
     377       16748 :             if (ref->poc == poc || (ref->poc & LtMask) == poc)
     378        3833 :                 return ref;
     379             :         }
     380             :     }
     381             : 
     382          42 :     if (s->nal_unit_type != HEVC_NAL_CRA_NUT && !IS_BLA(s))
     383           7 :         av_log(s->avctx, AV_LOG_ERROR,
     384             :                "Could not find ref with POC %d\n", poc);
     385          42 :     return NULL;
     386             : }
     387             : 
     388      316574 : static void mark_ref(HEVCFrame *frame, int flag)
     389             : {
     390      316574 :     frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF);
     391      316574 :     frame->flags |= flag;
     392      316574 : }
     393             : 
     394          42 : static HEVCFrame *generate_missing_ref(HEVCContext *s, int poc)
     395             : {
     396             :     HEVCFrame *frame;
     397             :     int i, x, y;
     398             : 
     399          42 :     frame = alloc_frame(s);
     400          42 :     if (!frame)
     401           0 :         return NULL;
     402             : 
     403          42 :     if (!s->avctx->hwaccel) {
     404          42 :         if (!s->ps.sps->pixel_shift) {
     405         120 :             for (i = 0; frame->frame->buf[i]; i++)
     406          90 :                 memset(frame->frame->buf[i]->data, 1 << (s->ps.sps->bit_depth - 1),
     407          90 :                        frame->frame->buf[i]->size);
     408             :         } else {
     409          48 :             for (i = 0; frame->frame->data[i]; i++)
     410       19620 :                 for (y = 0; y < (s->ps.sps->height >> s->ps.sps->vshift[i]); y++)
     411    25087104 :                     for (x = 0; x < (s->ps.sps->width >> s->ps.sps->hshift[i]); x++) {
     412    25067520 :                         AV_WN16(frame->frame->data[i] + y * frame->frame->linesize[i] + 2 * x,
     413             :                                 1 << (s->ps.sps->bit_depth - 1));
     414             :                     }
     415             :         }
     416             :     }
     417             : 
     418          42 :     frame->poc      = poc;
     419          42 :     frame->sequence = s->seq_decode;
     420          42 :     frame->flags    = 0;
     421             : 
     422          42 :     if (s->threads_type == FF_THREAD_FRAME)
     423           0 :         ff_thread_report_progress(&frame->tf, INT_MAX, 0);
     424             : 
     425          42 :     return frame;
     426             : }
     427             : 
     428             : /* add a reference with the given poc to the list and mark it as used in DPB */
     429       35001 : static int add_candidate_ref(HEVCContext *s, RefPicList *list,
     430             :                              int poc, int ref_flag)
     431             : {
     432       35001 :     HEVCFrame *ref = find_ref_idx(s, poc);
     433             : 
     434       35001 :     if (ref == s->ref || list->nb_refs >= HEVC_MAX_REFS)
     435           0 :         return AVERROR_INVALIDDATA;
     436             : 
     437       35001 :     if (!ref) {
     438          42 :         ref = generate_missing_ref(s, poc);
     439          42 :         if (!ref)
     440           0 :             return AVERROR(ENOMEM);
     441             :     }
     442             : 
     443       35001 :     list->list[list->nb_refs] = ref->poc;
     444       35001 :     list->ref[list->nb_refs]  = ref;
     445       35001 :     list->nb_refs++;
     446             : 
     447       35001 :     mark_ref(ref, ref_flag);
     448       35001 :     return 0;
     449             : }
     450             : 
     451        9443 : int ff_hevc_frame_rps(HEVCContext *s)
     452             : {
     453        9443 :     const ShortTermRPS *short_rps = s->sh.short_term_rps;
     454        9443 :     const LongTermRPS  *long_rps  = &s->sh.long_term_rps;
     455        9443 :     RefPicList               *rps = s->rps;
     456        9443 :     int i, ret = 0;
     457             : 
     458        9443 :     if (!short_rps) {
     459         360 :         rps[0].nb_refs = rps[1].nb_refs = 0;
     460         360 :         return 0;
     461             :     }
     462             : 
     463             :     /* clear the reference flags on all frames except the current one */
     464      299739 :     for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
     465      290656 :         HEVCFrame *frame = &s->DPB[i];
     466             : 
     467      290656 :         if (frame == s->ref)
     468        9083 :             continue;
     469             : 
     470      281573 :         mark_ref(frame, 0);
     471             :     }
     472             : 
     473       54498 :     for (i = 0; i < NB_RPS_TYPE; i++)
     474       45415 :         rps[i].nb_refs = 0;
     475             : 
     476             :     /* add the short refs */
     477       42553 :     for (i = 0; i < short_rps->num_delta_pocs; i++) {
     478       33470 :         int poc = s->poc + short_rps->delta_poc[i];
     479             :         int list;
     480             : 
     481       33470 :         if (!short_rps->used[i])
     482        1711 :             list = ST_FOLL;
     483       31759 :         else if (i < short_rps->num_negative_pics)
     484       23164 :             list = ST_CURR_BEF;
     485             :         else
     486        8595 :             list = ST_CURR_AFT;
     487             : 
     488       33470 :         ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF);
     489       33470 :         if (ret < 0)
     490           0 :             goto fail;
     491             :     }
     492             : 
     493             :     /* add the long refs */
     494       10614 :     for (i = 0; i < long_rps->nb_refs; i++) {
     495        1531 :         int poc  = long_rps->poc[i];
     496        1531 :         int list = long_rps->used[i] ? LT_CURR : LT_FOLL;
     497             : 
     498        1531 :         ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF);
     499        1531 :         if (ret < 0)
     500           0 :             goto fail;
     501             :     }
     502             : 
     503        9083 : fail:
     504             :     /* release any frames that are now unused */
     505      299739 :     for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
     506      290656 :         ff_hevc_unref_frame(s, &s->DPB[i], 0);
     507             : 
     508        9083 :     return ret;
     509             : }
     510             : 
     511       18398 : int ff_hevc_frame_nb_refs(const HEVCContext *s)
     512             : {
     513       18398 :     int ret = 0;
     514             :     int i;
     515       18398 :     const ShortTermRPS *rps = s->sh.short_term_rps;
     516       18398 :     const LongTermRPS *long_rps = &s->sh.long_term_rps;
     517             : 
     518       18398 :     if (rps) {
     519       63656 :         for (i = 0; i < rps->num_negative_pics; i++)
     520       45258 :             ret += !!rps->used[i];
     521       38662 :         for (; i < rps->num_delta_pocs; i++)
     522       20264 :             ret += !!rps->used[i];
     523             :     }
     524             : 
     525       18398 :     if (long_rps) {
     526       19788 :         for (i = 0; i < long_rps->nb_refs; i++)
     527        1390 :             ret += !!long_rps->used[i];
     528             :     }
     529       18398 :     return ret;
     530             : }

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