LCOV - code coverage report
Current view: top level - libavcodec - h264_parse.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 243 278 87.4 %
Date: 2018-05-20 11:54:08 Functions: 9 9 100.0 %

          Line data    Source code
       1             : /*
       2             :  * This file is part of FFmpeg.
       3             :  *
       4             :  * FFmpeg is free software; you can redistribute it and/or
       5             :  * modify it under the terms of the GNU Lesser General Public
       6             :  * License as published by the Free Software Foundation; either
       7             :  * version 2.1 of the License, or (at your option) any later version.
       8             :  *
       9             :  * FFmpeg is distributed in the hope that it will be useful,
      10             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12             :  * Lesser General Public License for more details.
      13             :  *
      14             :  * You should have received a copy of the GNU Lesser General Public
      15             :  * License along with FFmpeg; if not, write to the Free Software
      16             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      17             :  */
      18             : 
      19             : #include "bytestream.h"
      20             : #include "get_bits.h"
      21             : #include "golomb.h"
      22             : #include "h264.h"
      23             : #include "h264dec.h"
      24             : #include "h264_parse.h"
      25             : #include "h264_ps.h"
      26             : 
      27        2524 : int ff_h264_pred_weight_table(GetBitContext *gb, const SPS *sps,
      28             :                               const int *ref_count, int slice_type_nos,
      29             :                               H264PredWeightTable *pwt,
      30             :                               int picture_structure, void *logctx)
      31             : {
      32             :     int list, i, j;
      33             :     int luma_def, chroma_def;
      34             : 
      35        2524 :     pwt->use_weight             = 0;
      36        2524 :     pwt->use_weight_chroma      = 0;
      37             : 
      38        2524 :     pwt->luma_log2_weight_denom = get_ue_golomb(gb);
      39        2524 :     if (pwt->luma_log2_weight_denom > 7U) {
      40           0 :         av_log(logctx, AV_LOG_ERROR, "luma_log2_weight_denom %d is out of range\n", pwt->luma_log2_weight_denom);
      41           0 :         pwt->luma_log2_weight_denom = 0;
      42             :     }
      43        2524 :     luma_def = 1 << pwt->luma_log2_weight_denom;
      44             : 
      45        2524 :     if (sps->chroma_format_idc) {
      46        2524 :         pwt->chroma_log2_weight_denom = get_ue_golomb(gb);
      47        2524 :         if (pwt->chroma_log2_weight_denom > 7U) {
      48           0 :             av_log(logctx, AV_LOG_ERROR, "chroma_log2_weight_denom %d is out of range\n", pwt->chroma_log2_weight_denom);
      49           0 :             pwt->chroma_log2_weight_denom = 0;
      50             :         }
      51        2524 :         chroma_def = 1 << pwt->chroma_log2_weight_denom;
      52             :     }
      53             : 
      54        3116 :     for (list = 0; list < 2; list++) {
      55        2820 :         pwt->luma_weight_flag[list]   = 0;
      56        2820 :         pwt->chroma_weight_flag[list] = 0;
      57       15167 :         for (i = 0; i < ref_count[list]; i++) {
      58             :             int luma_weight_flag, chroma_weight_flag;
      59             : 
      60       12347 :             luma_weight_flag = get_bits1(gb);
      61       12347 :             if (luma_weight_flag) {
      62        5335 :                 pwt->luma_weight[i][list][0] = get_se_golomb(gb);
      63        5335 :                 pwt->luma_weight[i][list][1] = get_se_golomb(gb);
      64       10670 :                 if ((int8_t)pwt->luma_weight[i][list][0] != pwt->luma_weight[i][list][0] ||
      65        5335 :                     (int8_t)pwt->luma_weight[i][list][1] != pwt->luma_weight[i][list][1])
      66             :                     goto out_range_weight;
      67        6910 :                 if (pwt->luma_weight[i][list][0] != luma_def ||
      68        1575 :                     pwt->luma_weight[i][list][1] != 0) {
      69        4810 :                     pwt->use_weight             = 1;
      70        4810 :                     pwt->luma_weight_flag[list] = 1;
      71             :                 }
      72             :             } else {
      73        7012 :                 pwt->luma_weight[i][list][0] = luma_def;
      74        7012 :                 pwt->luma_weight[i][list][1] = 0;
      75             :             }
      76             : 
      77       12347 :             if (sps->chroma_format_idc) {
      78       12347 :                 chroma_weight_flag = get_bits1(gb);
      79       12347 :                 if (chroma_weight_flag) {
      80             :                     int j;
      81        8523 :                     for (j = 0; j < 2; j++) {
      82        5682 :                         pwt->chroma_weight[i][list][j][0] = get_se_golomb(gb);
      83        5682 :                         pwt->chroma_weight[i][list][j][1] = get_se_golomb(gb);
      84       11364 :                         if ((int8_t)pwt->chroma_weight[i][list][j][0] != pwt->chroma_weight[i][list][j][0] ||
      85        5682 :                             (int8_t)pwt->chroma_weight[i][list][j][1] != pwt->chroma_weight[i][list][j][1]) {
      86           0 :                             pwt->chroma_weight[i][list][j][0] = chroma_def;
      87           0 :                             pwt->chroma_weight[i][list][j][1] = 0;
      88           0 :                             goto out_range_weight;
      89             :                         }
      90        6261 :                         if (pwt->chroma_weight[i][list][j][0] != chroma_def ||
      91         579 :                             pwt->chroma_weight[i][list][j][1] != 0) {
      92        5673 :                             pwt->use_weight_chroma        = 1;
      93        5673 :                             pwt->chroma_weight_flag[list] = 1;
      94             :                         }
      95             :                     }
      96             :                 } else {
      97             :                     int j;
      98       28518 :                     for (j = 0; j < 2; j++) {
      99       19012 :                         pwt->chroma_weight[i][list][j][0] = chroma_def;
     100       19012 :                         pwt->chroma_weight[i][list][j][1] = 0;
     101             :                     }
     102             :                 }
     103             :             }
     104             : 
     105             :             // for MBAFF
     106       12347 :             if (picture_structure == PICT_FRAME) {
     107       10855 :                 pwt->luma_weight[16 + 2 * i][list][0] = pwt->luma_weight[16 + 2 * i + 1][list][0] = pwt->luma_weight[i][list][0];
     108       10855 :                 pwt->luma_weight[16 + 2 * i][list][1] = pwt->luma_weight[16 + 2 * i + 1][list][1] = pwt->luma_weight[i][list][1];
     109       10855 :                 if (sps->chroma_format_idc) {
     110       32565 :                     for (j = 0; j < 2; j++) {
     111       21710 :                         pwt->chroma_weight[16 + 2 * i][list][j][0] = pwt->chroma_weight[16 + 2 * i + 1][list][j][0] = pwt->chroma_weight[i][list][j][0];
     112       21710 :                         pwt->chroma_weight[16 + 2 * i][list][j][1] = pwt->chroma_weight[16 + 2 * i + 1][list][j][1] = pwt->chroma_weight[i][list][j][1];
     113             :                     }
     114             :                 }
     115             :             }
     116             :         }
     117        2820 :         if (slice_type_nos != AV_PICTURE_TYPE_B)
     118        2228 :             break;
     119             :     }
     120        2524 :     pwt->use_weight = pwt->use_weight || pwt->use_weight_chroma;
     121        2524 :     return 0;
     122           0 : out_range_weight:
     123           0 :     avpriv_request_sample(logctx, "Out of range weight\n");
     124           0 :     return AVERROR_INVALIDDATA;
     125             : }
     126             : 
     127             : /**
     128             :  * Check if the top & left blocks are available if needed and
     129             :  * change the dc mode so it only uses the available blocks.
     130             :  */
     131     2887638 : int ff_h264_check_intra4x4_pred_mode(int8_t *pred_mode_cache, void *logctx,
     132             :                                      int top_samples_available, int left_samples_available)
     133             : {
     134             :     static const int8_t top[12] = {
     135             :         -1, 0, LEFT_DC_PRED, -1, -1, -1, -1, -1, 0
     136             :     };
     137             :     static const int8_t left[12] = {
     138             :         0, -1, TOP_DC_PRED, 0, -1, -1, -1, 0, -1, DC_128_PRED
     139             :     };
     140             :     int i;
     141             : 
     142     2887638 :     if (!(top_samples_available & 0x8000)) {
     143      996090 :         for (i = 0; i < 4; i++) {
     144      796872 :             int status = top[pred_mode_cache[scan8[0] + i]];
     145      796872 :             if (status < 0) {
     146           0 :                 av_log(logctx, AV_LOG_ERROR,
     147             :                        "top block unavailable for requested intra mode %d\n",
     148             :                        status);
     149           0 :                 return AVERROR_INVALIDDATA;
     150      796872 :             } else if (status) {
     151      513343 :                 pred_mode_cache[scan8[0] + i] = status;
     152             :             }
     153             :         }
     154             :     }
     155             : 
     156     2887638 :     if ((left_samples_available & 0x8888) != 0x8888) {
     157             :         static const int mask[4] = { 0x8000, 0x2000, 0x80, 0x20 };
     158      316925 :         for (i = 0; i < 4; i++)
     159      253540 :             if (!(left_samples_available & mask[i])) {
     160      253486 :                 int status = left[pred_mode_cache[scan8[0] + 8 * i]];
     161      253486 :                 if (status < 0) {
     162           0 :                     av_log(logctx, AV_LOG_ERROR,
     163             :                            "left block unavailable for requested intra4x4 mode %d\n",
     164             :                            status);
     165           0 :                     return AVERROR_INVALIDDATA;
     166      253486 :                 } else if (status) {
     167       86152 :                     pred_mode_cache[scan8[0] + 8 * i] = status;
     168             :                 }
     169             :             }
     170             :     }
     171             : 
     172     2887638 :     return 0;
     173             : }
     174             : 
     175             : /**
     176             :  * Check if the top & left blocks are available if needed and
     177             :  * change the dc mode so it only uses the available blocks.
     178             :  */
     179     4509147 : int ff_h264_check_intra_pred_mode(void *logctx, int top_samples_available,
     180             :                                   int left_samples_available,
     181             :                                   int mode, int is_chroma)
     182             : {
     183             :     static const int8_t top[4]  = { LEFT_DC_PRED8x8, 1, -1, -1 };
     184             :     static const int8_t left[5] = { TOP_DC_PRED8x8, -1,  2, -1, DC_128_PRED8x8 };
     185             : 
     186     4509147 :     if (mode > 3U) {
     187           3 :         av_log(logctx, AV_LOG_ERROR,
     188             :                "out of range intra chroma pred mode\n");
     189           3 :         return AVERROR_INVALIDDATA;
     190             :     }
     191             : 
     192     4509144 :     if (!(top_samples_available & 0x8000)) {
     193      331668 :         mode = top[mode];
     194      331668 :         if (mode < 0) {
     195           1 :             av_log(logctx, AV_LOG_ERROR,
     196             :                    "top block unavailable for requested intra mode\n");
     197           1 :             return AVERROR_INVALIDDATA;
     198             :         }
     199             :     }
     200             : 
     201     4509143 :     if ((left_samples_available & 0x8080) != 0x8080) {
     202       97131 :         mode = left[mode];
     203       97131 :         if (mode < 0) {
     204           4 :             av_log(logctx, AV_LOG_ERROR,
     205             :                    "left block unavailable for requested intra mode\n");
     206           4 :             return AVERROR_INVALIDDATA;
     207             :         }
     208       97127 :         if (is_chroma && (left_samples_available & 0x8080)) {
     209             :             // mad cow disease mode, aka MBAFF + constrained_intra_pred
     210          54 :             mode = ALZHEIMER_DC_L0T_PRED8x8 +
     211          27 :                    (!(left_samples_available & 0x8000)) +
     212          27 :                    2 * (mode == DC_128_PRED8x8);
     213             :         }
     214             :     }
     215             : 
     216     4509139 :     return mode;
     217             : }
     218             : 
     219       47330 : int ff_h264_parse_ref_count(int *plist_count, int ref_count[2],
     220             :                             GetBitContext *gb, const PPS *pps,
     221             :                             int slice_type_nos, int picture_structure, void *logctx)
     222             : {
     223             :     int list_count;
     224             :     int num_ref_idx_active_override_flag;
     225             : 
     226             :     // set defaults, might be overridden a few lines later
     227       47330 :     ref_count[0] = pps->ref_count[0];
     228       47330 :     ref_count[1] = pps->ref_count[1];
     229             : 
     230       47330 :     if (slice_type_nos != AV_PICTURE_TYPE_I) {
     231             :         unsigned max[2];
     232       41498 :         max[0] = max[1] = picture_structure == PICT_FRAME ? 15 : 31;
     233             : 
     234       41498 :         num_ref_idx_active_override_flag = get_bits1(gb);
     235             : 
     236       41498 :         if (num_ref_idx_active_override_flag) {
     237       19393 :             ref_count[0] = get_ue_golomb(gb) + 1;
     238       19393 :             if (slice_type_nos == AV_PICTURE_TYPE_B) {
     239        5569 :                 ref_count[1] = get_ue_golomb(gb) + 1;
     240             :             } else
     241             :                 // full range is spec-ok in this case, even for frames
     242       13824 :                 ref_count[1] = 1;
     243             :         }
     244             : 
     245       41498 :         if (ref_count[0] - 1 > max[0] || ref_count[1] - 1 > max[1]) {
     246          27 :             av_log(logctx, AV_LOG_ERROR, "reference overflow %u > %u or %u > %u\n",
     247          18 :                    ref_count[0] - 1, max[0], ref_count[1] - 1, max[1]);
     248           9 :             ref_count[0] = ref_count[1] = 0;
     249           9 :             *plist_count = 0;
     250           9 :             goto fail;
     251             :         }
     252             : 
     253       41489 :         if (slice_type_nos == AV_PICTURE_TYPE_B)
     254       11465 :             list_count = 2;
     255             :         else
     256       30024 :             list_count = 1;
     257             :     } else {
     258        5832 :         list_count   = 0;
     259        5832 :         ref_count[0] = ref_count[1] = 0;
     260             :     }
     261             : 
     262       47321 :     *plist_count = list_count;
     263             : 
     264       47321 :     return 0;
     265           9 : fail:
     266           9 :     *plist_count = 0;
     267           9 :     ref_count[0] = 0;
     268           9 :     ref_count[1] = 0;
     269           9 :     return AVERROR_INVALIDDATA;
     270             : }
     271             : 
     272       50371 : int ff_h264_init_poc(int pic_field_poc[2], int *pic_poc,
     273             :                      const SPS *sps, H264POCContext *pc,
     274             :                      int picture_structure, int nal_ref_idc)
     275             : {
     276       50371 :     const int max_frame_num = 1 << sps->log2_max_frame_num;
     277             :     int64_t field_poc[2];
     278             : 
     279       50371 :     pc->frame_num_offset = pc->prev_frame_num_offset;
     280       50371 :     if (pc->frame_num < pc->prev_frame_num)
     281         263 :         pc->frame_num_offset += max_frame_num;
     282             : 
     283       50371 :     if (sps->poc_type == 0) {
     284       37556 :         const int max_poc_lsb = 1 << sps->log2_max_poc_lsb;
     285             : 
     286       55310 :         if (pc->poc_lsb < pc->prev_poc_lsb &&
     287       17754 :             pc->prev_poc_lsb - pc->poc_lsb >= max_poc_lsb / 2)
     288         136 :             pc->poc_msb = pc->prev_poc_msb + max_poc_lsb;
     289       54816 :         else if (pc->poc_lsb > pc->prev_poc_lsb &&
     290       17396 :                  pc->prev_poc_lsb - pc->poc_lsb < -max_poc_lsb / 2)
     291         180 :             pc->poc_msb = pc->prev_poc_msb - max_poc_lsb;
     292             :         else
     293       37240 :             pc->poc_msb = pc->prev_poc_msb;
     294       37556 :         field_poc[0] =
     295       37556 :         field_poc[1] = pc->poc_msb + pc->poc_lsb;
     296       37556 :         if (picture_structure == PICT_FRAME)
     297       26528 :             field_poc[1] += pc->delta_poc_bottom;
     298       12815 :     } else if (sps->poc_type == 1) {
     299             :         int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
     300             :         int i;
     301             : 
     302        6507 :         if (sps->poc_cycle_length != 0)
     303        6507 :             abs_frame_num = pc->frame_num_offset + pc->frame_num;
     304             :         else
     305           0 :             abs_frame_num = 0;
     306             : 
     307        6507 :         if (nal_ref_idc == 0 && abs_frame_num > 0)
     308         397 :             abs_frame_num--;
     309             : 
     310        6507 :         expected_delta_per_poc_cycle = 0;
     311       16848 :         for (i = 0; i < sps->poc_cycle_length; i++)
     312             :             // FIXME integrate during sps parse
     313       10341 :             expected_delta_per_poc_cycle += sps->offset_for_ref_frame[i];
     314             : 
     315        6507 :         if (abs_frame_num > 0) {
     316        6420 :             int poc_cycle_cnt          = (abs_frame_num - 1) / sps->poc_cycle_length;
     317        6420 :             int frame_num_in_poc_cycle = (abs_frame_num - 1) % sps->poc_cycle_length;
     318             : 
     319        6420 :             expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
     320       14662 :             for (i = 0; i <= frame_num_in_poc_cycle; i++)
     321        8242 :                 expectedpoc = expectedpoc + sps->offset_for_ref_frame[i];
     322             :         } else
     323          87 :             expectedpoc = 0;
     324             : 
     325        6507 :         if (nal_ref_idc == 0)
     326         397 :             expectedpoc = expectedpoc + sps->offset_for_non_ref_pic;
     327             : 
     328        6507 :         field_poc[0] = expectedpoc + pc->delta_poc[0];
     329        6507 :         field_poc[1] = field_poc[0] + sps->offset_for_top_to_bottom_field;
     330             : 
     331        6507 :         if (picture_structure == PICT_FRAME)
     332        5575 :             field_poc[1] += pc->delta_poc[1];
     333             :     } else {
     334        6308 :         int poc = 2 * (pc->frame_num_offset + pc->frame_num);
     335             : 
     336        6308 :         if (!nal_ref_idc)
     337           0 :             poc--;
     338             : 
     339        6308 :         field_poc[0] = poc;
     340        6308 :         field_poc[1] = poc;
     341             :     }
     342             : 
     343       50371 :     if (   field_poc[0] != (int)field_poc[0]
     344       50371 :         || field_poc[1] != (int)field_poc[1])
     345           0 :         return AVERROR_INVALIDDATA;
     346             : 
     347       50371 :     if (picture_structure != PICT_BOTTOM_FIELD)
     348       44396 :         pic_field_poc[0] = field_poc[0];
     349       50371 :     if (picture_structure != PICT_TOP_FIELD)
     350       44386 :         pic_field_poc[1] = field_poc[1];
     351       50371 :     *pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
     352             : 
     353       50371 :     return 0;
     354             : }
     355             : 
     356         445 : static int decode_extradata_ps(const uint8_t *data, int size, H264ParamSets *ps,
     357             :                                int is_avc, void *logctx)
     358             : {
     359         445 :     H2645Packet pkt = { 0 };
     360         445 :     int i, ret = 0;
     361             : 
     362         445 :     ret = ff_h2645_packet_split(&pkt, data, size, logctx, is_avc, 2, AV_CODEC_ID_H264, 1);
     363         445 :     if (ret < 0) {
     364           0 :         ret = 0;
     365           0 :         goto fail;
     366             :     }
     367             : 
     368        1094 :     for (i = 0; i < pkt.nb_nals; i++) {
     369         651 :         H2645NAL *nal = &pkt.nals[i];
     370         651 :         switch (nal->type) {
     371         326 :         case H264_NAL_SPS:
     372         326 :             ret = ff_h264_decode_seq_parameter_set(&nal->gb, logctx, ps, 0);
     373         326 :             if (ret < 0)
     374           2 :                 goto fail;
     375         324 :             break;
     376         325 :         case H264_NAL_PPS:
     377         325 :             ret = ff_h264_decode_picture_parameter_set(&nal->gb, logctx, ps,
     378             :                                                        nal->size_bits);
     379         325 :             if (ret < 0)
     380           0 :                 goto fail;
     381         325 :             break;
     382           0 :         default:
     383           0 :             av_log(logctx, AV_LOG_VERBOSE, "Ignoring NAL type %d in extradata\n",
     384             :                    nal->type);
     385           0 :             break;
     386             :         }
     387             :     }
     388             : 
     389         443 : fail:
     390         445 :     ff_h2645_packet_uninit(&pkt);
     391         445 :     return ret;
     392             : }
     393             : 
     394             : /* There are (invalid) samples in the wild with mp4-style extradata, where the
     395             :  * parameter sets are stored unescaped (i.e. as RBSP).
     396             :  * This function catches the parameter set decoding failure and tries again
     397             :  * after escaping it */
     398         238 : static int decode_extradata_ps_mp4(const uint8_t *buf, int buf_size, H264ParamSets *ps,
     399             :                                    int err_recognition, void *logctx)
     400             : {
     401             :     int ret;
     402             : 
     403         238 :     ret = decode_extradata_ps(buf, buf_size, ps, 1, logctx);
     404         238 :     if (ret < 0 && !(err_recognition & AV_EF_EXPLODE)) {
     405             :         GetByteContext gbc;
     406             :         PutByteContext pbc;
     407             :         uint8_t *escaped_buf;
     408             :         int escaped_buf_size;
     409             : 
     410           2 :         av_log(logctx, AV_LOG_WARNING,
     411             :                "SPS decoding failure, trying again after escaping the NAL\n");
     412             : 
     413           2 :         if (buf_size / 2 >= (INT16_MAX - AV_INPUT_BUFFER_PADDING_SIZE) / 3)
     414           0 :             return AVERROR(ERANGE);
     415           2 :         escaped_buf_size = buf_size * 3 / 2 + AV_INPUT_BUFFER_PADDING_SIZE;
     416           2 :         escaped_buf = av_mallocz(escaped_buf_size);
     417           2 :         if (!escaped_buf)
     418           0 :             return AVERROR(ENOMEM);
     419             : 
     420           2 :         bytestream2_init(&gbc, buf, buf_size);
     421           2 :         bytestream2_init_writer(&pbc, escaped_buf, escaped_buf_size);
     422             : 
     423          42 :         while (bytestream2_get_bytes_left(&gbc)) {
     424          72 :             if (bytestream2_get_bytes_left(&gbc) >= 3 &&
     425          34 :                 bytestream2_peek_be24(&gbc) <= 3) {
     426           4 :                 bytestream2_put_be24(&pbc, 3);
     427           4 :                 bytestream2_skip(&gbc, 2);
     428             :             } else
     429          34 :                 bytestream2_put_byte(&pbc, bytestream2_get_byte(&gbc));
     430             :         }
     431             : 
     432           2 :         escaped_buf_size = bytestream2_tell_p(&pbc);
     433           2 :         AV_WB16(escaped_buf, escaped_buf_size - 2);
     434             : 
     435           2 :         (void)decode_extradata_ps(escaped_buf, escaped_buf_size, ps, 1, logctx);
     436             :         // lorex.mp4 decodes ok even with extradata decoding failing
     437           2 :         av_freep(&escaped_buf);
     438             :     }
     439             : 
     440         238 :     return 0;
     441             : }
     442             : 
     443         327 : int ff_h264_decode_extradata(const uint8_t *data, int size, H264ParamSets *ps,
     444             :                              int *is_avc, int *nal_length_size,
     445             :                              int err_recognition, void *logctx)
     446             : {
     447             :     int ret;
     448             : 
     449         327 :     if (!data || size <= 0)
     450           0 :         return -1;
     451             : 
     452         327 :     if (data[0] == 1) {
     453             :         int i, cnt, nalsize;
     454         122 :         const uint8_t *p = data;
     455             : 
     456         122 :         *is_avc = 1;
     457             : 
     458         122 :         if (size < 7) {
     459           0 :             av_log(logctx, AV_LOG_ERROR, "avcC %d too short\n", size);
     460           0 :             return AVERROR_INVALIDDATA;
     461             :         }
     462             : 
     463             :         // Decode sps from avcC
     464         122 :         cnt = *(p + 5) & 0x1f; // Number of sps
     465         122 :         p  += 6;
     466         241 :         for (i = 0; i < cnt; i++) {
     467         119 :             nalsize = AV_RB16(p) + 2;
     468         119 :             if (nalsize > size - (p - data))
     469           0 :                 return AVERROR_INVALIDDATA;
     470         119 :             ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx);
     471         119 :             if (ret < 0) {
     472           0 :                 av_log(logctx, AV_LOG_ERROR,
     473             :                        "Decoding sps %d from avcC failed\n", i);
     474           0 :                 return ret;
     475             :             }
     476         119 :             p += nalsize;
     477             :         }
     478             :         // Decode pps from avcC
     479         122 :         cnt = *(p++); // Number of pps
     480         241 :         for (i = 0; i < cnt; i++) {
     481         119 :             nalsize = AV_RB16(p) + 2;
     482         119 :             if (nalsize > size - (p - data))
     483           0 :                 return AVERROR_INVALIDDATA;
     484         119 :             ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx);
     485         119 :             if (ret < 0) {
     486           0 :                 av_log(logctx, AV_LOG_ERROR,
     487             :                        "Decoding pps %d from avcC failed\n", i);
     488           0 :                 return ret;
     489             :             }
     490         119 :             p += nalsize;
     491             :         }
     492             :         // Store right nal length size that will be used to parse all other nals
     493         122 :         *nal_length_size = (data[4] & 0x03) + 1;
     494             :     } else {
     495         205 :         *is_avc = 0;
     496         205 :         ret = decode_extradata_ps(data, size, ps, 0, logctx);
     497         205 :         if (ret < 0)
     498           0 :             return ret;
     499             :     }
     500         327 :     return size;
     501             : }
     502             : 
     503             : /**
     504             :  * Compute profile from profile_idc and constraint_set?_flags.
     505             :  *
     506             :  * @param sps SPS
     507             :  *
     508             :  * @return profile as defined by FF_PROFILE_H264_*
     509             :  */
     510       50371 : int ff_h264_get_profile(const SPS *sps)
     511             : {
     512       50371 :     int profile = sps->profile_idc;
     513             : 
     514       50371 :     switch (sps->profile_idc) {
     515       13801 :     case FF_PROFILE_H264_BASELINE:
     516             :         // constraint_set1_flag set to 1
     517       13801 :         profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0;
     518       13801 :         break;
     519        1656 :     case FF_PROFILE_H264_HIGH_10:
     520             :     case FF_PROFILE_H264_HIGH_422:
     521             :     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
     522             :         // constraint_set3_flag set to 1
     523        1656 :         profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0;
     524        1656 :         break;
     525             :     }
     526             : 
     527       50371 :     return profile;
     528             : }

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