GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/hevc_sei.c Lines: 131 238 55.0 %
Date: 2020-09-21 17:35:45 Branches: 65 118 55.1 %

Line Branch Exec Source
1
/*
2
 * HEVC Supplementary Enhancement Information messages
3
 *
4
 * Copyright (C) 2012 - 2013 Guillaume Martres
5
 * Copyright (C) 2012 - 2013 Gildas Cocherel
6
 * Copyright (C) 2013 Vittorio Giovara
7
 *
8
 * This file is part of FFmpeg.
9
 *
10
 * FFmpeg is free software; you can redistribute it and/or
11
 * modify it under the terms of the GNU Lesser General Public
12
 * License as published by the Free Software Foundation; either
13
 * version 2.1 of the License, or (at your option) any later version.
14
 *
15
 * FFmpeg is distributed in the hope that it will be useful,
16
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18
 * Lesser General Public License for more details.
19
 *
20
 * You should have received a copy of the GNU Lesser General Public
21
 * License along with FFmpeg; if not, write to the Free Software
22
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23
 */
24
25
#include "atsc_a53.h"
26
#include "golomb.h"
27
#include "hevc_ps.h"
28
#include "hevc_sei.h"
29
30
6848
static int decode_nal_sei_decoded_picture_hash(HEVCSEIPictureHash *s, GetBitContext *gb)
31
{
32
    int cIdx, i;
33
    uint8_t hash_type;
34
    //uint16_t picture_crc;
35
    //uint32_t picture_checksum;
36
6848
    hash_type = get_bits(gb, 8);
37
38
27392
    for (cIdx = 0; cIdx < 3/*((s->sps->chroma_format_idc == 0) ? 1 : 3)*/; cIdx++) {
39
20544
        if (hash_type == 0) {
40
19497
            s->is_md5 = 1;
41
331449
            for (i = 0; i < 16; i++)
42
311952
                s->md5[cIdx][i] = get_bits(gb, 8);
43
1047
        } else if (hash_type == 1) {
44
            // picture_crc = get_bits(gb, 16);
45
291
            skip_bits(gb, 16);
46
756
        } else if (hash_type == 2) {
47
            // picture_checksum = get_bits_long(gb, 32);
48
756
            skip_bits(gb, 32);
49
        }
50
    }
51
6848
    return 0;
52
}
53
54
static int decode_nal_sei_mastering_display_info(HEVCSEIMasteringDisplay *s, GetBitContext *gb)
55
{
56
    int i;
57
    // Mastering primaries
58
    for (i = 0; i < 3; i++) {
59
        s->display_primaries[i][0] = get_bits(gb, 16);
60
        s->display_primaries[i][1] = get_bits(gb, 16);
61
    }
62
    // White point (x, y)
63
    s->white_point[0] = get_bits(gb, 16);
64
    s->white_point[1] = get_bits(gb, 16);
65
66
    // Max and min luminance of mastering display
67
    s->max_luminance = get_bits_long(gb, 32);
68
    s->min_luminance = get_bits_long(gb, 32);
69
70
    // As this SEI message comes before the first frame that references it,
71
    // initialize the flag to 2 and decrement on IRAP access unit so it
72
    // persists for the coded video sequence (e.g., between two IRAPs)
73
    s->present = 2;
74
    return 0;
75
}
76
77
static int decode_nal_sei_content_light_info(HEVCSEIContentLight *s, GetBitContext *gb)
78
{
79
    // Max and average light levels
80
    s->max_content_light_level     = get_bits(gb, 16);
81
    s->max_pic_average_light_level = get_bits(gb, 16);
82
    // As this SEI message comes before the first frame that references it,
83
    // initialize the flag to 2 and decrement on IRAP access unit so it
84
    // persists for the coded video sequence (e.g., between two IRAPs)
85
    s->present = 2;
86
    return  0;
87
}
88
89
static int decode_nal_sei_frame_packing_arrangement(HEVCSEIFramePacking *s, GetBitContext *gb)
90
{
91
    get_ue_golomb_long(gb);             // frame_packing_arrangement_id
92
    s->present = !get_bits1(gb);
93
94
    if (s->present) {
95
        s->arrangement_type               = get_bits(gb, 7);
96
        s->quincunx_subsampling           = get_bits1(gb);
97
        s->content_interpretation_type    = get_bits(gb, 6);
98
99
        // spatial_flipping_flag, frame0_flipped_flag, field_views_flag
100
        skip_bits(gb, 3);
101
        s->current_frame_is_frame0_flag = get_bits1(gb);
102
        // frame0_self_contained_flag, frame1_self_contained_flag
103
        skip_bits(gb, 2);
104
105
        if (!s->quincunx_subsampling && s->arrangement_type != 5)
106
            skip_bits(gb, 16);  // frame[01]_grid_position_[xy]
107
        skip_bits(gb, 8);       // frame_packing_arrangement_reserved_byte
108
        skip_bits1(gb);         // frame_packing_arrangement_persistence_flag
109
    }
110
    skip_bits1(gb);             // upsampled_aspect_ratio_flag
111
    return 0;
112
}
113
114
static int decode_nal_sei_display_orientation(HEVCSEIDisplayOrientation *s, GetBitContext *gb)
115
{
116
    s->present = !get_bits1(gb);
117
118
    if (s->present) {
119
        s->hflip = get_bits1(gb);     // hor_flip
120
        s->vflip = get_bits1(gb);     // ver_flip
121
122
        s->anticlockwise_rotation = get_bits(gb, 16);
123
        skip_bits1(gb);     // display_orientation_persistence_flag
124
    }
125
126
    return 0;
127
}
128
129
1173
static int decode_nal_sei_pic_timing(HEVCSEI *s, GetBitContext *gb, const HEVCParamSets *ps,
130
                                     void *logctx, int size)
131
{
132
1173
    HEVCSEIPictureTiming *h = &s->picture_timing;
133
    HEVCSPS *sps;
134
135
1173
    if (!ps->sps_list[s->active_seq_parameter_set_id])
136
44
        return(AVERROR(ENOMEM));
137
1129
    sps = (HEVCSPS*)ps->sps_list[s->active_seq_parameter_set_id]->data;
138
139
1129
    if (sps->vui.frame_field_info_present_flag) {
140
646
        int pic_struct = get_bits(gb, 4);
141
646
        h->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN;
142

646
        if (pic_struct == 2 || pic_struct == 10 || pic_struct == 12) {
143
10
            av_log(logctx, AV_LOG_DEBUG, "BOTTOM Field\n");
144
10
            h->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
145

636
        } else if (pic_struct == 1 || pic_struct == 9 || pic_struct == 11) {
146
11
            av_log(logctx, AV_LOG_DEBUG, "TOP Field\n");
147
11
            h->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD;
148
625
        } else if (pic_struct == 7) {
149
            av_log(logctx, AV_LOG_DEBUG, "Frame/Field Doubling\n");
150
            h->picture_struct = HEVC_SEI_PIC_STRUCT_FRAME_DOUBLING;
151
625
        } else if (pic_struct == 8) {
152
            av_log(logctx, AV_LOG_DEBUG, "Frame/Field Tripling\n");
153
            h->picture_struct = HEVC_SEI_PIC_STRUCT_FRAME_TRIPLING;
154
        }
155
646
        get_bits(gb, 2);                   // source_scan_type
156
646
        get_bits(gb, 1);                   // duplicate_flag
157
646
        skip_bits1(gb);
158
646
        size--;
159
    }
160
1129
    skip_bits_long(gb, 8 * size);
161
162
1129
    return 0;
163
}
164
165
static int decode_registered_user_data_closed_caption(HEVCSEIA53Caption *s, GetBitContext *gb,
166
                                                      int size)
167
{
168
    int ret;
169
170
    if (size < 3)
171
       return AVERROR(EINVAL);
172
173
    ret = ff_parse_a53_cc(&s->buf_ref, gb->buffer + get_bits_count(gb) / 8, size);
174
175
    if (ret < 0)
176
        return ret;
177
178
    skip_bits_long(gb, size * 8);
179
180
    return 0;
181
}
182
183
9
static int decode_nal_sei_user_data_unregistered(HEVCSEIUnregistered *s, GetBitContext *gb,
184
                                                      int size)
185
{
186
    AVBufferRef *buf_ref, **tmp;
187
188

9
    if (size < 16 || size >= INT_MAX - 1)
189
       return AVERROR_INVALIDDATA;
190
191
9
    tmp = av_realloc_array(s->buf_ref, s->nb_buf_ref + 1, sizeof(*s->buf_ref));
192
9
    if (!tmp)
193
        return AVERROR(ENOMEM);
194
9
    s->buf_ref = tmp;
195
196
9
    buf_ref = av_buffer_alloc(size + 1);
197
9
    if (!buf_ref)
198
        return AVERROR(ENOMEM);
199
200
12059
    for (int i = 0; i < size; i++)
201
12050
        buf_ref->data[i] = get_bits(gb, 8);
202
9
    buf_ref->data[size] = 0;
203
9
    buf_ref->size = size;
204
9
    s->buf_ref[s->nb_buf_ref++] = buf_ref;
205
206
9
    return 0;
207
}
208
209
64
static int decode_nal_sei_user_data_registered_itu_t_t35(HEVCSEI *s, GetBitContext *gb,
210
                                                         int size)
211
{
212
    uint32_t country_code;
213
    uint32_t user_identifier;
214
215
64
    if (size < 7)
216
        return AVERROR(EINVAL);
217
64
    size -= 7;
218
219
64
    country_code = get_bits(gb, 8);
220
64
    if (country_code == 0xFF) {
221
        skip_bits(gb, 8);
222
        size--;
223
    }
224
225
64
    skip_bits(gb, 8);
226
64
    skip_bits(gb, 8);
227
228
64
    user_identifier = get_bits_long(gb, 32);
229
230
64
    switch (user_identifier) {
231
        case MKBETAG('G', 'A', '9', '4'):
232
            return decode_registered_user_data_closed_caption(&s->a53_caption, gb, size);
233
64
        default:
234
64
            skip_bits_long(gb, size * 8);
235
64
            break;
236
    }
237
64
    return 0;
238
}
239
240
27
static int decode_nal_sei_active_parameter_sets(HEVCSEI *s, GetBitContext *gb, void *logctx)
241
{
242
    int num_sps_ids_minus1;
243
    int i;
244
    unsigned active_seq_parameter_set_id;
245
246
27
    get_bits(gb, 4); // active_video_parameter_set_id
247
27
    get_bits(gb, 1); // self_contained_cvs_flag
248
27
    get_bits(gb, 1); // num_sps_ids_minus1
249
27
    num_sps_ids_minus1 = get_ue_golomb_long(gb); // num_sps_ids_minus1
250
251

27
    if (num_sps_ids_minus1 < 0 || num_sps_ids_minus1 > 15) {
252
        av_log(logctx, AV_LOG_ERROR, "num_sps_ids_minus1 %d invalid\n", num_sps_ids_minus1);
253
        return AVERROR_INVALIDDATA;
254
    }
255
256
27
    active_seq_parameter_set_id = get_ue_golomb_long(gb);
257
27
    if (active_seq_parameter_set_id >= HEVC_MAX_SPS_COUNT) {
258
        av_log(logctx, AV_LOG_ERROR, "active_parameter_set_id %d invalid\n", active_seq_parameter_set_id);
259
        return AVERROR_INVALIDDATA;
260
    }
261
27
    s->active_seq_parameter_set_id = active_seq_parameter_set_id;
262
263
27
    for (i = 1; i <= num_sps_ids_minus1; i++)
264
        get_ue_golomb_long(gb); // active_seq_parameter_set_id[i]
265
266
27
    return 0;
267
}
268
269
static int decode_nal_sei_alternative_transfer(HEVCSEIAlternativeTransfer *s, GetBitContext *gb)
270
{
271
    s->present = 1;
272
    s->preferred_transfer_characteristics = get_bits(gb, 8);
273
    return 0;
274
}
275
276
64
static int decode_nal_sei_timecode(HEVCSEITimeCode *s, GetBitContext *gb)
277
{
278
64
    s->num_clock_ts = get_bits(gb, 2);
279
280
128
    for (int i = 0; i < s->num_clock_ts; i++) {
281
64
        s->clock_timestamp_flag[i] =  get_bits(gb, 1);
282
283
64
        if (s->clock_timestamp_flag[i]) {
284
            s->units_field_based_flag[i] = get_bits(gb, 1);
285
            s->counting_type[i]          = get_bits(gb, 5);
286
            s->full_timestamp_flag[i]    = get_bits(gb, 1);
287
            s->discontinuity_flag[i]     = get_bits(gb, 1);
288
            s->cnt_dropped_flag[i]       = get_bits(gb, 1);
289
290
            s->n_frames[i]               = get_bits(gb, 9);
291
292
            if (s->full_timestamp_flag[i]) {
293
                s->seconds_value[i]      = av_clip(get_bits(gb, 6), 0, 59);
294
                s->minutes_value[i]      = av_clip(get_bits(gb, 6), 0, 59);
295
                s->hours_value[i]        = av_clip(get_bits(gb, 5), 0, 23);
296
            } else {
297
                s->seconds_flag[i] = get_bits(gb, 1);
298
                if (s->seconds_flag[i]) {
299
                    s->seconds_value[i] = av_clip(get_bits(gb, 6), 0, 59);
300
                    s->minutes_flag[i]  = get_bits(gb, 1);
301
                    if (s->minutes_flag[i]) {
302
                        s->minutes_value[i] = av_clip(get_bits(gb, 6), 0, 59);
303
                        s->hours_flag[i] =  get_bits(gb, 1);
304
                        if (s->hours_flag[i]) {
305
                            s->hours_value[i] = av_clip(get_bits(gb, 5), 0, 23);
306
                        }
307
                    }
308
                }
309
            }
310
311
            s->time_offset_length[i] = get_bits(gb, 5);
312
            if (s->time_offset_length[i] > 0) {
313
                s->time_offset_value[i] = get_bits(gb, s->time_offset_length[i]);
314
            }
315
        }
316
    }
317
318
64
    s->present = 1;
319
64
    return 0;
320
}
321
322
323
1421
static int decode_nal_sei_prefix(GetBitContext *gb, void *logctx, HEVCSEI *s,
324
                                 const HEVCParamSets *ps, int type, int size)
325
{
326



1421
    switch (type) {
327
    case 256:  // Mismatched value from HM 8.1
328
        return decode_nal_sei_decoded_picture_hash(&s->picture_hash, gb);
329
    case HEVC_SEI_TYPE_FRAME_PACKING:
330
        return decode_nal_sei_frame_packing_arrangement(&s->frame_packing, gb);
331
    case HEVC_SEI_TYPE_DISPLAY_ORIENTATION:
332
        return decode_nal_sei_display_orientation(&s->display_orientation, gb);
333
1173
    case HEVC_SEI_TYPE_PICTURE_TIMING:
334
1173
        return decode_nal_sei_pic_timing(s, gb, ps, logctx, size);
335
    case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
336
        return decode_nal_sei_mastering_display_info(&s->mastering_display, gb);
337
    case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
338
        return decode_nal_sei_content_light_info(&s->content_light, gb);
339
27
    case HEVC_SEI_TYPE_ACTIVE_PARAMETER_SETS:
340
27
        return decode_nal_sei_active_parameter_sets(s, gb, logctx);
341
64
    case HEVC_SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35:
342
64
        return decode_nal_sei_user_data_registered_itu_t_t35(s, gb, size);
343
9
    case HEVC_SEI_TYPE_USER_DATA_UNREGISTERED:
344
9
        return decode_nal_sei_user_data_unregistered(&s->unregistered, gb, size);
345
    case HEVC_SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS:
346
        return decode_nal_sei_alternative_transfer(&s->alternative_transfer, gb);
347
64
    case HEVC_SEI_TYPE_TIME_CODE:
348
64
        return decode_nal_sei_timecode(&s->timecode, gb);
349
84
    default:
350
84
        av_log(logctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type);
351
84
        skip_bits_long(gb, 8 * size);
352
84
        return 0;
353
    }
354
}
355
356
6848
static int decode_nal_sei_suffix(GetBitContext *gb, void *logctx, HEVCSEI *s,
357
                                 int type, int size)
358
{
359
6848
    switch (type) {
360
6848
    case HEVC_SEI_TYPE_DECODED_PICTURE_HASH:
361
6848
        return decode_nal_sei_decoded_picture_hash(&s->picture_hash, gb);
362
    default:
363
        av_log(logctx, AV_LOG_DEBUG, "Skipped SUFFIX SEI %d\n", type);
364
        skip_bits_long(gb, 8 * size);
365
        return 0;
366
    }
367
}
368
369
8333
static int decode_nal_sei_message(GetBitContext *gb, void *logctx, HEVCSEI *s,
370
                                  const HEVCParamSets *ps, int nal_unit_type)
371
{
372
8333
    int payload_type = 0;
373
8333
    int payload_size = 0;
374
8333
    int byte = 0xFF;
375
8333
    av_log(logctx, AV_LOG_DEBUG, "Decoding SEI\n");
376
377
16602
    while (byte == 0xFF) {
378

8333
        if (get_bits_left(gb) < 16 || payload_type > INT_MAX - 255)
379
64
            return AVERROR_INVALIDDATA;
380
8269
        byte          = get_bits(gb, 8);
381
8269
        payload_type += byte;
382
    }
383
8269
    byte = 0xFF;
384
16581
    while (byte == 0xFF) {
385
8312
        if (get_bits_left(gb) < 8 + 8LL*payload_size)
386
            return AVERROR_INVALIDDATA;
387
8312
        byte          = get_bits(gb, 8);
388
8312
        payload_size += byte;
389
    }
390
8269
    if (nal_unit_type == HEVC_NAL_SEI_PREFIX) {
391
1421
        return decode_nal_sei_prefix(gb, logctx, s, ps, payload_type, payload_size);
392
    } else { /* nal_unit_type == NAL_SEI_SUFFIX */
393
6848
        return decode_nal_sei_suffix(gb, logctx, s, payload_type, payload_size);
394
    }
395
}
396
397
8225
static int more_rbsp_data(GetBitContext *gb)
398
{
399

8225
    return get_bits_left(gb) > 0 && show_bits(gb, 8) != 0x80;
400
}
401
402
8333
int ff_hevc_decode_nal_sei(GetBitContext *gb, void *logctx, HEVCSEI *s,
403
                           const HEVCParamSets *ps, int type)
404
{
405
    int ret;
406
407
    do {
408
8333
        ret = decode_nal_sei_message(gb, logctx, s, ps, type);
409
8333
        if (ret < 0)
410
108
            return ret;
411
8225
    } while (more_rbsp_data(gb));
412
8158
    return 1;
413
}
414
415
12383
void ff_hevc_reset_sei(HEVCSEI *s)
416
{
417
12383
    av_buffer_unref(&s->a53_caption.buf_ref);
418
419
12386
    for (int i = 0; i < s->unregistered.nb_buf_ref; i++)
420
3
        av_buffer_unref(&s->unregistered.buf_ref[i]);
421
12383
    s->unregistered.nb_buf_ref = 0;
422
12383
    av_freep(&s->unregistered.buf_ref);
423
12383
}