GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/hevc_sei.c Lines: 100 200 50.0 %
Date: 2020-01-27 20:17:04 Branches: 49 102 48.0 %

Line Branch Exec Source
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/*
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 * HEVC Supplementary Enhancement Information messages
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 *
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 * Copyright (C) 2012 - 2013 Guillaume Martres
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 * Copyright (C) 2012 - 2013 Gildas Cocherel
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 * Copyright (C) 2013 Vittorio Giovara
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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25
#include "golomb.h"
26
#include "hevc_ps.h"
27
#include "hevc_sei.h"
28
29
6848
static int decode_nal_sei_decoded_picture_hash(HEVCSEIPictureHash *s, GetBitContext *gb)
30
{
31
    int cIdx, i;
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    uint8_t hash_type;
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    //uint16_t picture_crc;
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    //uint32_t picture_checksum;
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6848
    hash_type = get_bits(gb, 8);
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37
27392
    for (cIdx = 0; cIdx < 3/*((s->sps->chroma_format_idc == 0) ? 1 : 3)*/; cIdx++) {
38
20544
        if (hash_type == 0) {
39
19497
            s->is_md5 = 1;
40
331449
            for (i = 0; i < 16; i++)
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311952
                s->md5[cIdx][i] = get_bits(gb, 8);
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1047
        } else if (hash_type == 1) {
43
            // picture_crc = get_bits(gb, 16);
44
291
            skip_bits(gb, 16);
45
756
        } else if (hash_type == 2) {
46
            // picture_checksum = get_bits_long(gb, 32);
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756
            skip_bits(gb, 32);
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        }
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    }
50
6848
    return 0;
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}
52
53
static int decode_nal_sei_mastering_display_info(HEVCSEIMasteringDisplay *s, GetBitContext *gb)
54
{
55
    int i;
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    // Mastering primaries
57
    for (i = 0; i < 3; i++) {
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        s->display_primaries[i][0] = get_bits(gb, 16);
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        s->display_primaries[i][1] = get_bits(gb, 16);
60
    }
61
    // White point (x, y)
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    s->white_point[0] = get_bits(gb, 16);
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    s->white_point[1] = get_bits(gb, 16);
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65
    // Max and min luminance of mastering display
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    s->max_luminance = get_bits_long(gb, 32);
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    s->min_luminance = get_bits_long(gb, 32);
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69
    // As this SEI message comes before the first frame that references it,
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    // initialize the flag to 2 and decrement on IRAP access unit so it
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    // persists for the coded video sequence (e.g., between two IRAPs)
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    s->present = 2;
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    return 0;
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}
75
76
static int decode_nal_sei_content_light_info(HEVCSEIContentLight *s, GetBitContext *gb)
77
{
78
    // Max and average light levels
79
    s->max_content_light_level     = get_bits(gb, 16);
80
    s->max_pic_average_light_level = get_bits(gb, 16);
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    // As this SEI message comes before the first frame that references it,
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    // initialize the flag to 2 and decrement on IRAP access unit so it
83
    // persists for the coded video sequence (e.g., between two IRAPs)
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    s->present = 2;
85
    return  0;
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}
87
88
static int decode_nal_sei_frame_packing_arrangement(HEVCSEIFramePacking *s, GetBitContext *gb)
89
{
90
    get_ue_golomb_long(gb);             // frame_packing_arrangement_id
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    s->present = !get_bits1(gb);
92
93
    if (s->present) {
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        s->arrangement_type               = get_bits(gb, 7);
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        s->quincunx_subsampling           = get_bits1(gb);
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        s->content_interpretation_type    = get_bits(gb, 6);
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98
        // spatial_flipping_flag, frame0_flipped_flag, field_views_flag
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        skip_bits(gb, 3);
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        s->current_frame_is_frame0_flag = get_bits1(gb);
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        // frame0_self_contained_flag, frame1_self_contained_flag
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        skip_bits(gb, 2);
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        if (!s->quincunx_subsampling && s->arrangement_type != 5)
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            skip_bits(gb, 16);  // frame[01]_grid_position_[xy]
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        skip_bits(gb, 8);       // frame_packing_arrangement_reserved_byte
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        skip_bits1(gb);         // frame_packing_arrangement_persistence_flag
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    }
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    skip_bits1(gb);             // upsampled_aspect_ratio_flag
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    return 0;
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}
112
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static int decode_nal_sei_display_orientation(HEVCSEIDisplayOrientation *s, GetBitContext *gb)
114
{
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    s->present = !get_bits1(gb);
116
117
    if (s->present) {
118
        s->hflip = get_bits1(gb);     // hor_flip
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        s->vflip = get_bits1(gb);     // ver_flip
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121
        s->anticlockwise_rotation = get_bits(gb, 16);
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        skip_bits1(gb);     // display_orientation_persistence_flag
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    }
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    return 0;
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}
127
128
1173
static int decode_nal_sei_pic_timing(HEVCSEI *s, GetBitContext *gb, const HEVCParamSets *ps,
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                                     void *logctx, int size)
130
{
131
1173
    HEVCSEIPictureTiming *h = &s->picture_timing;
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    HEVCSPS *sps;
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1173
    if (!ps->sps_list[s->active_seq_parameter_set_id])
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44
        return(AVERROR(ENOMEM));
136
1129
    sps = (HEVCSPS*)ps->sps_list[s->active_seq_parameter_set_id]->data;
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138
1129
    if (sps->vui.frame_field_info_present_flag) {
139
646
        int pic_struct = get_bits(gb, 4);
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646
        h->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN;
141

646
        if (pic_struct == 2 || pic_struct == 10 || pic_struct == 12) {
142
10
            av_log(logctx, AV_LOG_DEBUG, "BOTTOM Field\n");
143
10
            h->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
144

636
        } else if (pic_struct == 1 || pic_struct == 9 || pic_struct == 11) {
145
11
            av_log(logctx, AV_LOG_DEBUG, "TOP Field\n");
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11
            h->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD;
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        }
148
646
        get_bits(gb, 2);                   // source_scan_type
149
646
        get_bits(gb, 1);                   // duplicate_flag
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646
        skip_bits1(gb);
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646
        size--;
152
    }
153
1129
    skip_bits_long(gb, 8 * size);
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155
1129
    return 0;
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}
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158
static int decode_registered_user_data_closed_caption(HEVCSEIA53Caption *s, GetBitContext *gb,
159
                                                      int size)
160
{
161
    int flag;
162
    int user_data_type_code;
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    int cc_count;
164
165
    if (size < 3)
166
       return AVERROR(EINVAL);
167
168
    user_data_type_code = get_bits(gb, 8);
169
    if (user_data_type_code == 0x3) {
170
        skip_bits(gb, 1); // reserved
171
172
        flag = get_bits(gb, 1); // process_cc_data_flag
173
        if (flag) {
174
            skip_bits(gb, 1);
175
            cc_count = get_bits(gb, 5);
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            skip_bits(gb, 8); // reserved
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            size -= 2;
178
179
            if (cc_count && size >= cc_count * 3) {
180
                int old_size = s->buf_ref ? s->buf_ref->size : 0;
181
                const uint64_t new_size = (old_size + cc_count
182
                                           * UINT64_C(3));
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                int i, ret;
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185
                if (new_size > INT_MAX)
186
                    return AVERROR(EINVAL);
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188
                /* Allow merging of the cc data from two fields. */
189
                ret = av_buffer_realloc(&s->buf_ref, new_size);
190
                if (ret < 0)
191
                    return ret;
192
193
                for (i = 0; i < cc_count; i++) {
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                    s->buf_ref->data[old_size++] = get_bits(gb, 8);
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                    s->buf_ref->data[old_size++] = get_bits(gb, 8);
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                    s->buf_ref->data[old_size++] = get_bits(gb, 8);
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                }
198
                skip_bits(gb, 8); // marker_bits
199
            }
200
        }
201
    } else {
202
        int i;
203
        for (i = 0; i < size - 1; i++)
204
            skip_bits(gb, 8);
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    }
206
207
    return 0;
208
}
209
210
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static int decode_nal_sei_user_data_registered_itu_t_t35(HEVCSEI *s, GetBitContext *gb,
211
                                                         int size)
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{
213
    uint32_t country_code;
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    uint32_t user_identifier;
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216
64
    if (size < 7)
217
        return AVERROR(EINVAL);
218
64
    size -= 7;
219
220
64
    country_code = get_bits(gb, 8);
221
64
    if (country_code == 0xFF) {
222
        skip_bits(gb, 8);
223
        size--;
224
    }
225
226
64
    skip_bits(gb, 8);
227
64
    skip_bits(gb, 8);
228
229
64
    user_identifier = get_bits_long(gb, 32);
230
231
64
    switch (user_identifier) {
232
        case MKBETAG('G', 'A', '9', '4'):
233
            return decode_registered_user_data_closed_caption(&s->a53_caption, gb, size);
234
64
        default:
235
64
            skip_bits_long(gb, size * 8);
236
64
            break;
237
    }
238
64
    return 0;
239
}
240
241
27
static int decode_nal_sei_active_parameter_sets(HEVCSEI *s, GetBitContext *gb, void *logctx)
242
{
243
    int num_sps_ids_minus1;
244
    int i;
245
    unsigned active_seq_parameter_set_id;
246
247
27
    get_bits(gb, 4); // active_video_parameter_set_id
248
27
    get_bits(gb, 1); // self_contained_cvs_flag
249
27
    get_bits(gb, 1); // num_sps_ids_minus1
250
27
    num_sps_ids_minus1 = get_ue_golomb_long(gb); // num_sps_ids_minus1
251
252

27
    if (num_sps_ids_minus1 < 0 || num_sps_ids_minus1 > 15) {
253
        av_log(logctx, AV_LOG_ERROR, "num_sps_ids_minus1 %d invalid\n", num_sps_ids_minus1);
254
        return AVERROR_INVALIDDATA;
255
    }
256
257
27
    active_seq_parameter_set_id = get_ue_golomb_long(gb);
258
27
    if (active_seq_parameter_set_id >= HEVC_MAX_SPS_COUNT) {
259
        av_log(logctx, AV_LOG_ERROR, "active_parameter_set_id %d invalid\n", active_seq_parameter_set_id);
260
        return AVERROR_INVALIDDATA;
261
    }
262
27
    s->active_seq_parameter_set_id = active_seq_parameter_set_id;
263
264
27
    for (i = 1; i <= num_sps_ids_minus1; i++)
265
        get_ue_golomb_long(gb); // active_seq_parameter_set_id[i]
266
267
27
    return 0;
268
}
269
270
static int decode_nal_sei_alternative_transfer(HEVCSEIAlternativeTransfer *s, GetBitContext *gb)
271
{
272
    s->present = 1;
273
    s->preferred_transfer_characteristics = get_bits(gb, 8);
274
    return 0;
275
}
276
277
1421
static int decode_nal_sei_prefix(GetBitContext *gb, void *logctx, HEVCSEI *s,
278
                                 const HEVCParamSets *ps, int type, int size)
279
{
280


1421
    switch (type) {
281
    case 256:  // Mismatched value from HM 8.1
282
        return decode_nal_sei_decoded_picture_hash(&s->picture_hash, gb);
283
    case HEVC_SEI_TYPE_FRAME_PACKING:
284
        return decode_nal_sei_frame_packing_arrangement(&s->frame_packing, gb);
285
    case HEVC_SEI_TYPE_DISPLAY_ORIENTATION:
286
        return decode_nal_sei_display_orientation(&s->display_orientation, gb);
287
1173
    case HEVC_SEI_TYPE_PICTURE_TIMING:
288
1173
        return decode_nal_sei_pic_timing(s, gb, ps, logctx, size);
289
    case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
290
        return decode_nal_sei_mastering_display_info(&s->mastering_display, gb);
291
    case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
292
        return decode_nal_sei_content_light_info(&s->content_light, gb);
293
27
    case HEVC_SEI_TYPE_ACTIVE_PARAMETER_SETS:
294
27
        return decode_nal_sei_active_parameter_sets(s, gb, logctx);
295
64
    case HEVC_SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35:
296
64
        return decode_nal_sei_user_data_registered_itu_t_t35(s, gb, size);
297
    case HEVC_SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS:
298
        return decode_nal_sei_alternative_transfer(&s->alternative_transfer, gb);
299
157
    default:
300
157
        av_log(logctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type);
301
157
        skip_bits_long(gb, 8 * size);
302
157
        return 0;
303
    }
304
}
305
306
6848
static int decode_nal_sei_suffix(GetBitContext *gb, void *logctx, HEVCSEI *s,
307
                                 int type, int size)
308
{
309
6848
    switch (type) {
310
6848
    case HEVC_SEI_TYPE_DECODED_PICTURE_HASH:
311
6848
        return decode_nal_sei_decoded_picture_hash(&s->picture_hash, gb);
312
    default:
313
        av_log(logctx, AV_LOG_DEBUG, "Skipped SUFFIX SEI %d\n", type);
314
        skip_bits_long(gb, 8 * size);
315
        return 0;
316
    }
317
}
318
319
8269
static int decode_nal_sei_message(GetBitContext *gb, void *logctx, HEVCSEI *s,
320
                                  const HEVCParamSets *ps, int nal_unit_type)
321
{
322
8269
    int payload_type = 0;
323
8269
    int payload_size = 0;
324
8269
    int byte = 0xFF;
325
8269
    av_log(logctx, AV_LOG_DEBUG, "Decoding SEI\n");
326
327
16538
    while (byte == 0xFF) {
328

8269
        if (get_bits_left(gb) < 16 || payload_type > INT_MAX - 255)
329
            return AVERROR_INVALIDDATA;
330
8269
        byte          = get_bits(gb, 8);
331
8269
        payload_type += byte;
332
    }
333
8269
    byte = 0xFF;
334
16581
    while (byte == 0xFF) {
335
8312
        if (get_bits_left(gb) < 8 + 8LL*payload_size)
336
            return AVERROR_INVALIDDATA;
337
8312
        byte          = get_bits(gb, 8);
338
8312
        payload_size += byte;
339
    }
340
8269
    if (nal_unit_type == HEVC_NAL_SEI_PREFIX) {
341
1421
        return decode_nal_sei_prefix(gb, logctx, s, ps, payload_type, payload_size);
342
    } else { /* nal_unit_type == NAL_SEI_SUFFIX */
343
6848
        return decode_nal_sei_suffix(gb, logctx, s, payload_type, payload_size);
344
    }
345
}
346
347
8225
static int more_rbsp_data(GetBitContext *gb)
348
{
349

8225
    return get_bits_left(gb) > 0 && show_bits(gb, 8) != 0x80;
350
}
351
352
8269
int ff_hevc_decode_nal_sei(GetBitContext *gb, void *logctx, HEVCSEI *s,
353
                           const HEVCParamSets *ps, int type)
354
{
355
    int ret;
356
357
    do {
358
8269
        ret = decode_nal_sei_message(gb, logctx, s, ps, type);
359
8269
        if (ret < 0)
360
44
            return ret;
361
8225
    } while (more_rbsp_data(gb));
362
8222
    return 1;
363
}
364
365
12383
void ff_hevc_reset_sei(HEVCSEI *s)
366
{
367
12383
    av_buffer_unref(&s->a53_caption.buf_ref);
368
12383
}