aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/h264_metadata_bsf.c
blob: 452a8ec5dc7dd40e75c0cd7ddb5888a8399dc47e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
/*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "libavutil/avstring.h"
#include "libavutil/display.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"

#include "bsf.h"
#include "cbs.h"
#include "cbs_bsf.h"
#include "cbs_h264.h"
#include "h264.h"
#include "h264_levels.h"
#include "h264_sei.h"

enum {
    FLIP_HORIZONTAL = 1,
    FLIP_VERTICAL   = 2,
};

enum {
    LEVEL_UNSET = -2,
    LEVEL_AUTO  = -1,
};

typedef struct H264MetadataContext {
    CBSBSFContext common;

    int done_first_au;

    int aud;
    H264RawAUD aud_nal;

    AVRational sample_aspect_ratio;

    int overscan_appropriate_flag;

    int video_format;
    int video_full_range_flag;
    int colour_primaries;
    int transfer_characteristics;
    int matrix_coefficients;

    int chroma_sample_loc_type;

    AVRational tick_rate;
    int fixed_frame_rate_flag;
    int zero_new_constraint_set_flags;

    int crop_left;
    int crop_right;
    int crop_top;
    int crop_bottom;

    const char *sei_user_data;
    SEIRawUserDataUnregistered sei_user_data_payload;

    int delete_filler;

    int display_orientation;
    double rotate;
    int flip;
    H264RawSEIDisplayOrientation display_orientation_payload;

    int level;
} H264MetadataContext;


static int h264_metadata_insert_aud(AVBSFContext *bsf,
                                    CodedBitstreamFragment *au)
{
    H264MetadataContext *ctx = bsf->priv_data;
    int primary_pic_type_mask = 0xff;
    int err, i, j;

    static const int primary_pic_type_table[] = {
        0x084, // 2, 7
        0x0a5, // 0, 2, 5, 7
        0x0e7, // 0, 1, 2, 5, 6, 7
        0x210, // 4, 9
        0x318, // 3, 4, 8, 9
        0x294, // 2, 4, 7, 9
        0x3bd, // 0, 2, 3, 4, 5, 7, 8, 9
        0x3ff, // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
    };

    for (i = 0; i < au->nb_units; i++) {
        if (au->units[i].type == H264_NAL_SLICE ||
            au->units[i].type == H264_NAL_IDR_SLICE) {
            H264RawSlice *slice = au->units[i].content;
            for (j = 0; j < FF_ARRAY_ELEMS(primary_pic_type_table); j++) {
                if (!(primary_pic_type_table[j] &
                      (1 << slice->header.slice_type)))
                    primary_pic_type_mask &= ~(1 << j);
            }
        }
    }
    for (j = 0; j < FF_ARRAY_ELEMS(primary_pic_type_table); j++)
        if (primary_pic_type_mask & (1 << j))
            break;
    if (j >= FF_ARRAY_ELEMS(primary_pic_type_table)) {
        av_log(bsf, AV_LOG_ERROR, "No usable primary_pic_type: "
               "invalid slice types?\n");
        return AVERROR_INVALIDDATA;
    }

    ctx->aud_nal = (H264RawAUD) {
        .nal_unit_header.nal_unit_type = H264_NAL_AUD,
        .primary_pic_type = j,
    };

    err = ff_cbs_insert_unit_content(au, 0, H264_NAL_AUD,
                                     &ctx->aud_nal, NULL);
    if (err < 0) {
        av_log(bsf, AV_LOG_ERROR, "Failed to insert AUD.\n");
        return err;
    }

    return 0;
}

static int h264_metadata_update_sps(AVBSFContext *bsf,
                                    H264RawSPS *sps)
{
    H264MetadataContext *ctx = bsf->priv_data;
    int need_vui = 0;
    int crop_unit_x, crop_unit_y;

    if (ctx->sample_aspect_ratio.num && ctx->sample_aspect_ratio.den) {
        // Table E-1.
        static const AVRational sar_idc[] = {
            {   0,  0 }, // Unspecified (never written here).
            {   1,  1 }, {  12, 11 }, {  10, 11 }, {  16, 11 },
            {  40, 33 }, {  24, 11 }, {  20, 11 }, {  32, 11 },
            {  80, 33 }, {  18, 11 }, {  15, 11 }, {  64, 33 },
            { 160, 99 }, {   4,  3 }, {   3,  2 }, {   2,  1 },
        };
        int num, den, i;

        av_reduce(&num, &den, ctx->sample_aspect_ratio.num,
                  ctx->sample_aspect_ratio.den, 65535);

        for (i = 1; i < FF_ARRAY_ELEMS(sar_idc); i++) {
            if (num == sar_idc[i].num &&
                den == sar_idc[i].den)
                break;
        }
        if (i == FF_ARRAY_ELEMS(sar_idc)) {
            sps->vui.aspect_ratio_idc = 255;
            sps->vui.sar_width  = num;
            sps->vui.sar_height = den;
        } else {
            sps->vui.aspect_ratio_idc = i;
        }
        sps->vui.aspect_ratio_info_present_flag = 1;
        need_vui = 1;
    }

#define SET_VUI_FIELD(field) do { \
        if (ctx->field >= 0) { \
            sps->vui.field = ctx->field; \
            need_vui = 1; \
        } \
    } while (0)

    if (ctx->overscan_appropriate_flag >= 0) {
        SET_VUI_FIELD(overscan_appropriate_flag);
        sps->vui.overscan_info_present_flag = 1;
    }

    if (ctx->video_format             >= 0 ||
        ctx->video_full_range_flag    >= 0 ||
        ctx->colour_primaries         >= 0 ||
        ctx->transfer_characteristics >= 0 ||
        ctx->matrix_coefficients      >= 0) {

        SET_VUI_FIELD(video_format);

        SET_VUI_FIELD(video_full_range_flag);

        if (ctx->colour_primaries         >= 0 ||
            ctx->transfer_characteristics >= 0 ||
            ctx->matrix_coefficients      >= 0) {

            SET_VUI_FIELD(colour_primaries);
            SET_VUI_FIELD(transfer_characteristics);
            SET_VUI_FIELD(matrix_coefficients);

            sps->vui.colour_description_present_flag = 1;
        }
        sps->vui.video_signal_type_present_flag = 1;
    }

    if (ctx->chroma_sample_loc_type >= 0) {
        sps->vui.chroma_sample_loc_type_top_field =
            ctx->chroma_sample_loc_type;
        sps->vui.chroma_sample_loc_type_bottom_field =
            ctx->chroma_sample_loc_type;
        sps->vui.chroma_loc_info_present_flag = 1;
        need_vui = 1;
    }

    if (ctx->tick_rate.num && ctx->tick_rate.den) {
        int num, den;

        av_reduce(&num, &den, ctx->tick_rate.num, ctx->tick_rate.den,
                  UINT32_MAX > INT_MAX ? UINT32_MAX : INT_MAX);

        sps->vui.time_scale        = num;
        sps->vui.num_units_in_tick = den;

        sps->vui.timing_info_present_flag = 1;
        need_vui = 1;
    }
    SET_VUI_FIELD(fixed_frame_rate_flag);
    if (ctx->zero_new_constraint_set_flags) {
        sps->constraint_set4_flag = 0;
        sps->constraint_set5_flag = 0;
    }

    if (sps->separate_colour_plane_flag || sps->chroma_format_idc == 0) {
        crop_unit_x = 1;
        crop_unit_y = 2 - sps->frame_mbs_only_flag;
    } else {
        crop_unit_x = 1 + (sps->chroma_format_idc < 3);
        crop_unit_y = (1 + (sps->chroma_format_idc < 2)) *
                       (2 - sps->frame_mbs_only_flag);
    }
#define CROP(border, unit) do { \
        if (ctx->crop_ ## border >= 0) { \
            if (ctx->crop_ ## border % unit != 0) { \
                av_log(bsf, AV_LOG_ERROR, "Invalid value for crop_%s: " \
                       "must be a multiple of %d.\n", #border, unit); \
                return AVERROR(EINVAL); \
            } \
            sps->frame_crop_ ## border ## _offset = \
                  ctx->crop_ ## border / unit; \
            sps->frame_cropping_flag = 1; \
        } \
    } while (0)
    CROP(left,   crop_unit_x);
    CROP(right,  crop_unit_x);
    CROP(top,    crop_unit_y);
    CROP(bottom, crop_unit_y);
#undef CROP

    if (ctx->level != LEVEL_UNSET) {
        int level_idc;

        if (ctx->level == LEVEL_AUTO) {
            const H264LevelDescriptor *desc;
            int64_t bit_rate;
            int width, height, dpb_frames;
            int framerate;

            if (sps->vui.nal_hrd_parameters_present_flag) {
                bit_rate = (sps->vui.nal_hrd_parameters.bit_rate_value_minus1[0] + 1) *
                    (INT64_C(1) << (sps->vui.nal_hrd_parameters.bit_rate_scale + 6));
            } else if (sps->vui.vcl_hrd_parameters_present_flag) {
                bit_rate = (sps->vui.vcl_hrd_parameters.bit_rate_value_minus1[0] + 1) *
                    (INT64_C(1) << (sps->vui.vcl_hrd_parameters.bit_rate_scale + 6));
                // Adjust for VCL vs. NAL limits.
                bit_rate = bit_rate * 6 / 5;
            } else {
                bit_rate = 0;
            }

            // Don't use max_dec_frame_buffering if it is only inferred.
            dpb_frames = sps->vui.bitstream_restriction_flag ?
                sps->vui.max_dec_frame_buffering : H264_MAX_DPB_FRAMES;

            width  = 16 * (sps->pic_width_in_mbs_minus1 + 1);
            height = 16 * (sps->pic_height_in_map_units_minus1 + 1) *
                (2 - sps->frame_mbs_only_flag);

            if (sps->vui.timing_info_present_flag)
                framerate = sps->vui.time_scale / sps->vui.num_units_in_tick / 2;
            else
                framerate = 0;

            desc = ff_h264_guess_level(sps->profile_idc, bit_rate, framerate,
                                       width, height, dpb_frames);
            if (desc) {
                level_idc = desc->level_idc;
            } else {
                av_log(bsf, AV_LOG_WARNING, "Stream does not appear to "
                       "conform to any level: using level 6.2.\n");
                level_idc = 62;
            }
        } else {
            level_idc = ctx->level;
        }

        if (level_idc == 9) {
            if (sps->profile_idc == 66 ||
                sps->profile_idc == 77 ||
                sps->profile_idc == 88) {
                sps->level_idc = 11;
                sps->constraint_set3_flag = 1;
            } else {
                sps->level_idc = 9;
            }
        } else {
            sps->level_idc = level_idc;
        }
    }

    if (need_vui)
        sps->vui_parameters_present_flag = 1;

    return 0;
}

static int h264_metadata_handle_display_orientation(AVBSFContext *bsf,
                                                    AVPacket *pkt,
                                                    CodedBitstreamFragment *au,
                                                    int seek_point)
{
    H264MetadataContext *ctx = bsf->priv_data;
    SEIRawMessage *message;
    int err;

    message = NULL;
    while (ff_cbs_sei_find_message(ctx->common.output, au,
                                   SEI_TYPE_DISPLAY_ORIENTATION,
                                   &message) == 0) {
        H264RawSEIDisplayOrientation *disp = message->payload;
        int32_t *matrix;

        matrix = av_malloc(9 * sizeof(int32_t));
        if (!matrix)
            return AVERROR(ENOMEM);

        av_display_rotation_set(matrix,
                                disp->anticlockwise_rotation *
                                180.0 / 65536.0);
        av_display_matrix_flip(matrix, disp->hor_flip, disp->ver_flip);

        // If there are multiple display orientation messages in an
        // access unit, then the last one added to the packet (i.e.
        // the first one in the access unit) will prevail.
        err = av_packet_add_side_data(pkt, AV_PKT_DATA_DISPLAYMATRIX,
                                      (uint8_t*)matrix,
                                      9 * sizeof(int32_t));
        if (err < 0) {
            av_log(bsf, AV_LOG_ERROR, "Failed to attach extracted "
                   "displaymatrix side data to packet.\n");
            av_free(matrix);
            return AVERROR(ENOMEM);
        }
    }

    if (ctx->display_orientation == BSF_ELEMENT_REMOVE ||
        ctx->display_orientation == BSF_ELEMENT_INSERT) {
        ff_cbs_sei_delete_message_type(ctx->common.output, au,
                                       SEI_TYPE_DISPLAY_ORIENTATION);
    }

    if (ctx->display_orientation == BSF_ELEMENT_INSERT) {
        H264RawSEIDisplayOrientation *disp =
            &ctx->display_orientation_payload;
        uint8_t *data;
        size_t size;
        int write = 0;

        data = av_packet_get_side_data(pkt, AV_PKT_DATA_DISPLAYMATRIX, &size);
        if (data && size >= 9 * sizeof(int32_t)) {
            int32_t matrix[9];
            double dmatrix[9];
            int hflip, vflip, i;
            double scale_x, scale_y, angle;

            memcpy(matrix, data, sizeof(matrix));

            for (i = 0; i < 9; i++)
                dmatrix[i] = matrix[i] / 65536.0;

            // Extract scale factors.
            scale_x = hypot(dmatrix[0], dmatrix[3]);
            scale_y = hypot(dmatrix[1], dmatrix[4]);

            // Select flips to make the main diagonal positive.
            hflip = dmatrix[0] < 0.0;
            vflip = dmatrix[4] < 0.0;
            if (hflip)
                scale_x = -scale_x;
            if (vflip)
                scale_y = -scale_y;

            // Rescale.
            for (i = 0; i < 9; i += 3) {
                dmatrix[i]     /= scale_x;
                dmatrix[i + 1] /= scale_y;
            }

            // Extract rotation.
            angle = atan2(dmatrix[3], dmatrix[0]);

            if (!(angle >= -M_PI && angle <= M_PI) ||
                matrix[2] != 0.0 || matrix[5] != 0.0 ||
                matrix[6] != 0.0 || matrix[7] != 0.0) {
                av_log(bsf, AV_LOG_WARNING, "Input display matrix is not "
                       "representable in H.264 parameters.\n");
            } else {
                disp->hor_flip = hflip;
                disp->ver_flip = vflip;
                disp->anticlockwise_rotation =
                    (uint16_t)rint((angle >= 0.0 ? angle
                                                 : angle + 2 * M_PI) *
                                   32768.0 / M_PI);
                write = 1;
            }
        }

        if (seek_point) {
            if (!isnan(ctx->rotate)) {
                disp->anticlockwise_rotation =
                    (uint16_t)rint((ctx->rotate >= 0.0 ? ctx->rotate
                                                       : ctx->rotate + 360.0) *
                                   65536.0 / 360.0);
                write = 1;
            }
            if (ctx->flip) {
                disp->hor_flip = !!(ctx->flip & FLIP_HORIZONTAL);
                disp->ver_flip = !!(ctx->flip & FLIP_VERTICAL);
                write = 1;
            }
        }

        if (write) {
            disp->display_orientation_repetition_period = 1;

            err = ff_cbs_sei_add_message(ctx->common.output, au, 1,
                                         SEI_TYPE_DISPLAY_ORIENTATION,
                                         disp, NULL);
            if (err < 0) {
                av_log(bsf, AV_LOG_ERROR, "Failed to add display orientation "
                       "SEI message to access unit.\n");
                return err;
            }
        }
    }

    return 0;
}

static int h264_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt,
                                         CodedBitstreamFragment *au)
{
    H264MetadataContext *ctx = bsf->priv_data;
    int err, i, has_sps, seek_point;

    // If an AUD is present, it must be the first NAL unit.
    if (au->nb_units && au->units[0].type == H264_NAL_AUD) {
        if (ctx->aud == BSF_ELEMENT_REMOVE)
            ff_cbs_delete_unit(au, 0);
    } else {
        if (pkt && ctx->aud == BSF_ELEMENT_INSERT) {
            err = h264_metadata_insert_aud(bsf, au);
            if (err < 0)
                return err;
        }
    }

    has_sps = 0;
    for (i = 0; i < au->nb_units; i++) {
        if (au->units[i].type == H264_NAL_SPS) {
            err = h264_metadata_update_sps(bsf, au->units[i].content);
            if (err < 0)
                return err;
            has_sps = 1;
        }
    }

    if (pkt) {
        // The current packet should be treated as a seek point for metadata
        // insertion if any of:
        // - It is the first packet in the stream.
        // - It contains an SPS, indicating that a sequence might start here.
        // - It is marked as containing a key frame.
        seek_point = !ctx->done_first_au || has_sps ||
            (pkt->flags & AV_PKT_FLAG_KEY);
    } else {
        seek_point = 0;
    }

    if (ctx->sei_user_data && seek_point) {
        err = ff_cbs_sei_add_message(ctx->common.output, au, 1,
                                     SEI_TYPE_USER_DATA_UNREGISTERED,
                                     &ctx->sei_user_data_payload, NULL);
        if (err < 0) {
            av_log(bsf, AV_LOG_ERROR, "Failed to add user data SEI "
                   "message to access unit.\n");
            return err;
        }
    }

    if (ctx->delete_filler) {
        for (i = au->nb_units - 1; i >= 0; i--) {
            if (au->units[i].type == H264_NAL_FILLER_DATA) {
                ff_cbs_delete_unit(au, i);
                continue;
            }
        }

        ff_cbs_sei_delete_message_type(ctx->common.output, au,
                                       SEI_TYPE_FILLER_PAYLOAD);
    }

    if (pkt && ctx->display_orientation != BSF_ELEMENT_PASS) {
        err = h264_metadata_handle_display_orientation(bsf, pkt, au,
                                                       seek_point);
        if (err < 0)
            return err;
    }

    if (pkt)
        ctx->done_first_au = 1;

    return 0;
}

static const CBSBSFType h264_metadata_type = {
    .codec_id        = AV_CODEC_ID_H264,
    .fragment_name   = "access unit",
    .unit_name       = "NAL unit",
    .update_fragment = &h264_metadata_update_fragment,
};

static int h264_metadata_init(AVBSFContext *bsf)
{
    H264MetadataContext *ctx = bsf->priv_data;

    if (ctx->sei_user_data) {
        SEIRawUserDataUnregistered *udu = &ctx->sei_user_data_payload;
        int i, j;

        // Parse UUID.  It must be a hex string of length 32, possibly
        // containing '-'s between hex digits (which we ignore).
        for (i = j = 0; j < 32 && i < 64 && ctx->sei_user_data[i]; i++) {
            int c, v;
            c = ctx->sei_user_data[i];
            if (c == '-') {
                continue;
            } else if (av_isxdigit(c)) {
                c = av_tolower(c);
                v = (c <= '9' ? c - '0' : c - 'a' + 10);
            } else {
                break;
            }
            if (j & 1)
                udu->uuid_iso_iec_11578[j / 2] |= v;
            else
                udu->uuid_iso_iec_11578[j / 2] = v << 4;
            ++j;
        }
        if (j == 32 && ctx->sei_user_data[i] == '+') {
            udu->data = (uint8_t*)ctx->sei_user_data + i + 1;
            udu->data_length = strlen(udu->data) + 1;
        } else {
            av_log(bsf, AV_LOG_ERROR, "Invalid user data: "
                   "must be \"UUID+string\".\n");
            return AVERROR(EINVAL);
        }
    }

    return ff_cbs_bsf_generic_init(bsf, &h264_metadata_type);
}

#define OFFSET(x) offsetof(H264MetadataContext, x)
#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
static const AVOption h264_metadata_options[] = {
    BSF_ELEMENT_OPTIONS_PIR("aud", "Access Unit Delimiter NAL units",
                            aud, FLAGS),

    { "sample_aspect_ratio", "Set sample aspect ratio (table E-1)",
        OFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL,
        { .dbl = 0.0 }, 0, 65535, FLAGS },

    { "overscan_appropriate_flag", "Set VUI overscan appropriate flag",
        OFFSET(overscan_appropriate_flag), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 1, FLAGS },

    { "video_format", "Set video format (table E-2)",
        OFFSET(video_format), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 7, FLAGS},
    { "video_full_range_flag", "Set video full range flag",
        OFFSET(video_full_range_flag), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 1, FLAGS },
    { "colour_primaries", "Set colour primaries (table E-3)",
        OFFSET(colour_primaries), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 255, FLAGS },
    { "transfer_characteristics", "Set transfer characteristics (table E-4)",
        OFFSET(transfer_characteristics), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 255, FLAGS },
    { "matrix_coefficients", "Set matrix coefficients (table E-5)",
        OFFSET(matrix_coefficients), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 255, FLAGS },

    { "chroma_sample_loc_type", "Set chroma sample location type (figure E-1)",
        OFFSET(chroma_sample_loc_type), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 6, FLAGS },

    { "tick_rate", "Set VUI tick rate (num_units_in_tick / time_scale)",
        OFFSET(tick_rate), AV_OPT_TYPE_RATIONAL,
        { .dbl = 0.0 }, 0, UINT_MAX, FLAGS },
    { "fixed_frame_rate_flag", "Set VUI fixed frame rate flag",
        OFFSET(fixed_frame_rate_flag), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 1, FLAGS },
    { "zero_new_constraint_set_flags", "Set constraint_set4_flag / constraint_set5_flag to zero",
        OFFSET(zero_new_constraint_set_flags), AV_OPT_TYPE_BOOL,
        { .i64 = 0 }, 0, 1, FLAGS },

    { "crop_left", "Set left border crop offset",
        OFFSET(crop_left), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, H264_MAX_WIDTH, FLAGS },
    { "crop_right", "Set right border crop offset",
        OFFSET(crop_right), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, H264_MAX_WIDTH, FLAGS },
    { "crop_top", "Set top border crop offset",
        OFFSET(crop_top), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, H264_MAX_HEIGHT, FLAGS },
    { "crop_bottom", "Set bottom border crop offset",
        OFFSET(crop_bottom), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, H264_MAX_HEIGHT, FLAGS },

    { "sei_user_data", "Insert SEI user data (UUID+string)",
        OFFSET(sei_user_data), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },

    { "delete_filler", "Delete all filler (both NAL and SEI)",
        OFFSET(delete_filler), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS},

    BSF_ELEMENT_OPTIONS_PIRE("display_orientation",
                             "Display orientation SEI",
                             display_orientation, FLAGS),

    { "rotate", "Set rotation in display orientation SEI (anticlockwise angle in degrees)",
        OFFSET(rotate), AV_OPT_TYPE_DOUBLE,
        { .dbl = NAN }, -360.0, +360.0, FLAGS },
    { "flip", "Set flip in display orientation SEI",
        OFFSET(flip), AV_OPT_TYPE_FLAGS,
        { .i64 = 0 }, 0, FLIP_HORIZONTAL | FLIP_VERTICAL, FLAGS, "flip" },
    { "horizontal", "Set hor_flip",
        0, AV_OPT_TYPE_CONST,
        { .i64 = FLIP_HORIZONTAL }, .flags = FLAGS, .unit = "flip" },
    { "vertical",   "Set ver_flip",
        0, AV_OPT_TYPE_CONST,
        { .i64 = FLIP_VERTICAL },   .flags = FLAGS, .unit = "flip" },

    { "level", "Set level (table A-1)",
        OFFSET(level), AV_OPT_TYPE_INT,
        { .i64 = LEVEL_UNSET }, LEVEL_UNSET, 0xff, FLAGS, "level" },
    { "auto", "Attempt to guess level from stream properties",
        0, AV_OPT_TYPE_CONST,
        { .i64 = LEVEL_AUTO }, .flags = FLAGS, .unit = "level" },
#define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, \
        { .i64 = value },      .flags = FLAGS, .unit = "level"
    { LEVEL("1",   10) },
    { LEVEL("1b",   9) },
    { LEVEL("1.1", 11) },
    { LEVEL("1.2", 12) },
    { LEVEL("1.3", 13) },
    { LEVEL("2",   20) },
    { LEVEL("2.1", 21) },
    { LEVEL("2.2", 22) },
    { LEVEL("3",   30) },
    { LEVEL("3.1", 31) },
    { LEVEL("3.2", 32) },
    { LEVEL("4",   40) },
    { LEVEL("4.1", 41) },
    { LEVEL("4.2", 42) },
    { LEVEL("5",   50) },
    { LEVEL("5.1", 51) },
    { LEVEL("5.2", 52) },
    { LEVEL("6",   60) },
    { LEVEL("6.1", 61) },
    { LEVEL("6.2", 62) },
#undef LEVEL

    { NULL }
};

static const AVClass h264_metadata_class = {
    .class_name = "h264_metadata_bsf",
    .item_name  = av_default_item_name,
    .option     = h264_metadata_options,
    .version    = LIBAVUTIL_VERSION_INT,
};

static const enum AVCodecID h264_metadata_codec_ids[] = {
    AV_CODEC_ID_H264, AV_CODEC_ID_NONE,
};

const AVBitStreamFilter ff_h264_metadata_bsf = {
    .name           = "h264_metadata",
    .priv_data_size = sizeof(H264MetadataContext),
    .priv_class     = &h264_metadata_class,
    .init           = &h264_metadata_init,
    .close          = &ff_cbs_bsf_generic_close,
    .filter         = &ff_cbs_bsf_generic_filter,
    .codec_ids      = h264_metadata_codec_ids,
};