summaryrefslogtreecommitdiffstats
path: root/media/ffvpx/libavcodec/utils.c
blob: 599da21dba29f1eb4f8742753b9e263208e1dabd (plain)
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
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
/*
 * utils for libavcodec
 * Copyright (c) 2001 Fabrice Bellard
 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
 *
 * 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
 */

/**
 * @file
 * utils.
 */

#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixfmt.h"
#include "avcodec.h"
#include "codec.h"
#include "codec_internal.h"
#include "decode.h"
#include "hwconfig.h"
#include "thread.h"
#include "threadframe.h"
#include "internal.h"
#include "put_bits.h"
#include "startcode.h"
#include <stdlib.h>
#include <limits.h>

void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
{
    uint8_t **p = ptr;
    if (min_size > SIZE_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
        av_freep(p);
        *size = 0;
        return;
    }
    av_fast_mallocz(p, size, min_size + AV_INPUT_BUFFER_PADDING_SIZE);
    if (*p)
        memset(*p + min_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
}

void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size)
{
    uint8_t **p = ptr;
    if (min_size > SIZE_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
        av_freep(p);
        *size = 0;
        return;
    }
    av_fast_malloc(p, size, min_size + AV_INPUT_BUFFER_PADDING_SIZE);
    if (*p)
        memset(*p, 0, min_size + AV_INPUT_BUFFER_PADDING_SIZE);
}

int av_codec_is_encoder(const AVCodec *avcodec)
{
    const FFCodec *const codec = ffcodec(avcodec);
    return codec && (codec->cb_type == FF_CODEC_CB_TYPE_ENCODE     ||
                     codec->cb_type == FF_CODEC_CB_TYPE_ENCODE_SUB ||
                     codec->cb_type == FF_CODEC_CB_TYPE_RECEIVE_PACKET);
}

int av_codec_is_decoder(const AVCodec *avcodec)
{
    const FFCodec *const codec = ffcodec(avcodec);
    return codec && (codec->cb_type == FF_CODEC_CB_TYPE_DECODE     ||
                     codec->cb_type == FF_CODEC_CB_TYPE_DECODE_SUB ||
                     codec->cb_type == FF_CODEC_CB_TYPE_RECEIVE_FRAME);
}

int ff_set_dimensions(AVCodecContext *s, int width, int height)
{
    int ret = av_image_check_size2(width, height, s->max_pixels, AV_PIX_FMT_NONE, 0, s);

    if (ret < 0)
        width = height = 0;

    s->coded_width  = width;
    s->coded_height = height;
    s->width        = AV_CEIL_RSHIFT(width,  s->lowres);
    s->height       = AV_CEIL_RSHIFT(height, s->lowres);

    return ret;
}

int ff_set_sar(AVCodecContext *avctx, AVRational sar)
{
    int ret = av_image_check_sar(avctx->width, avctx->height, sar);

    if (ret < 0) {
        av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %d/%d\n",
               sar.num, sar.den);
        avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
        return ret;
    } else {
        avctx->sample_aspect_ratio = sar;
    }
    return 0;
}

int ff_side_data_update_matrix_encoding(AVFrame *frame,
                                        enum AVMatrixEncoding matrix_encoding)
{
    AVFrameSideData *side_data;
    enum AVMatrixEncoding *data;

    side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_MATRIXENCODING);
    if (!side_data)
        side_data = av_frame_new_side_data(frame, AV_FRAME_DATA_MATRIXENCODING,
                                           sizeof(enum AVMatrixEncoding));

    if (!side_data)
        return AVERROR(ENOMEM);

    data  = (enum AVMatrixEncoding*)side_data->data;
    *data = matrix_encoding;

    return 0;
}

void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
                               int linesize_align[AV_NUM_DATA_POINTERS])
{
    int i;
    int w_align = 1;
    int h_align = 1;
    AVPixFmtDescriptor const *desc = av_pix_fmt_desc_get(s->pix_fmt);

    if (desc) {
        w_align = 1 << desc->log2_chroma_w;
        h_align = 1 << desc->log2_chroma_h;
    }

    switch (s->pix_fmt) {
    case AV_PIX_FMT_YUV420P:
    case AV_PIX_FMT_YUYV422:
    case AV_PIX_FMT_YVYU422:
    case AV_PIX_FMT_UYVY422:
    case AV_PIX_FMT_YUV422P:
    case AV_PIX_FMT_YUV440P:
    case AV_PIX_FMT_YUV444P:
    case AV_PIX_FMT_GBRP:
    case AV_PIX_FMT_GBRAP:
    case AV_PIX_FMT_GRAY8:
    case AV_PIX_FMT_GRAY16BE:
    case AV_PIX_FMT_GRAY16LE:
    case AV_PIX_FMT_YUVJ420P:
    case AV_PIX_FMT_YUVJ422P:
    case AV_PIX_FMT_YUVJ440P:
    case AV_PIX_FMT_YUVJ444P:
    case AV_PIX_FMT_YUVA420P:
    case AV_PIX_FMT_YUVA422P:
    case AV_PIX_FMT_YUVA444P:
    case AV_PIX_FMT_YUV420P9LE:
    case AV_PIX_FMT_YUV420P9BE:
    case AV_PIX_FMT_YUV420P10LE:
    case AV_PIX_FMT_YUV420P10BE:
    case AV_PIX_FMT_YUV420P12LE:
    case AV_PIX_FMT_YUV420P12BE:
    case AV_PIX_FMT_YUV420P14LE:
    case AV_PIX_FMT_YUV420P14BE:
    case AV_PIX_FMT_YUV420P16LE:
    case AV_PIX_FMT_YUV420P16BE:
    case AV_PIX_FMT_YUVA420P9LE:
    case AV_PIX_FMT_YUVA420P9BE:
    case AV_PIX_FMT_YUVA420P10LE:
    case AV_PIX_FMT_YUVA420P10BE:
    case AV_PIX_FMT_YUVA420P16LE:
    case AV_PIX_FMT_YUVA420P16BE:
    case AV_PIX_FMT_YUV422P9LE:
    case AV_PIX_FMT_YUV422P9BE:
    case AV_PIX_FMT_YUV422P10LE:
    case AV_PIX_FMT_YUV422P10BE:
    case AV_PIX_FMT_YUV422P12LE:
    case AV_PIX_FMT_YUV422P12BE:
    case AV_PIX_FMT_YUV422P14LE:
    case AV_PIX_FMT_YUV422P14BE:
    case AV_PIX_FMT_YUV422P16LE:
    case AV_PIX_FMT_YUV422P16BE:
    case AV_PIX_FMT_YUVA422P9LE:
    case AV_PIX_FMT_YUVA422P9BE:
    case AV_PIX_FMT_YUVA422P10LE:
    case AV_PIX_FMT_YUVA422P10BE:
    case AV_PIX_FMT_YUVA422P12LE:
    case AV_PIX_FMT_YUVA422P12BE:
    case AV_PIX_FMT_YUVA422P16LE:
    case AV_PIX_FMT_YUVA422P16BE:
    case AV_PIX_FMT_YUV440P10LE:
    case AV_PIX_FMT_YUV440P10BE:
    case AV_PIX_FMT_YUV440P12LE:
    case AV_PIX_FMT_YUV440P12BE:
    case AV_PIX_FMT_YUV444P9LE:
    case AV_PIX_FMT_YUV444P9BE:
    case AV_PIX_FMT_YUV444P10LE:
    case AV_PIX_FMT_YUV444P10BE:
    case AV_PIX_FMT_YUV444P12LE:
    case AV_PIX_FMT_YUV444P12BE:
    case AV_PIX_FMT_YUV444P14LE:
    case AV_PIX_FMT_YUV444P14BE:
    case AV_PIX_FMT_YUV444P16LE:
    case AV_PIX_FMT_YUV444P16BE:
    case AV_PIX_FMT_YUVA444P9LE:
    case AV_PIX_FMT_YUVA444P9BE:
    case AV_PIX_FMT_YUVA444P10LE:
    case AV_PIX_FMT_YUVA444P10BE:
    case AV_PIX_FMT_YUVA444P12LE:
    case AV_PIX_FMT_YUVA444P12BE:
    case AV_PIX_FMT_YUVA444P16LE:
    case AV_PIX_FMT_YUVA444P16BE:
    case AV_PIX_FMT_GBRP9LE:
    case AV_PIX_FMT_GBRP9BE:
    case AV_PIX_FMT_GBRP10LE:
    case AV_PIX_FMT_GBRP10BE:
    case AV_PIX_FMT_GBRP12LE:
    case AV_PIX_FMT_GBRP12BE:
    case AV_PIX_FMT_GBRP14LE:
    case AV_PIX_FMT_GBRP14BE:
    case AV_PIX_FMT_GBRP16LE:
    case AV_PIX_FMT_GBRP16BE:
    case AV_PIX_FMT_GBRAP12LE:
    case AV_PIX_FMT_GBRAP12BE:
    case AV_PIX_FMT_GBRAP16LE:
    case AV_PIX_FMT_GBRAP16BE:
        w_align = 16; //FIXME assume 16 pixel per macroblock
        h_align = 16 * 2; // interlaced needs 2 macroblocks height
        if (s->codec_id == AV_CODEC_ID_BINKVIDEO)
            w_align = 16*2;
        break;
    case AV_PIX_FMT_YUV411P:
    case AV_PIX_FMT_YUVJ411P:
    case AV_PIX_FMT_UYYVYY411:
        w_align = 32;
        h_align = 16 * 2;
        break;
    case AV_PIX_FMT_YUV410P:
        if (s->codec_id == AV_CODEC_ID_SVQ1) {
            w_align = 64;
            h_align = 64;
        }
        break;
    case AV_PIX_FMT_RGB555:
        if (s->codec_id == AV_CODEC_ID_RPZA) {
            w_align = 4;
            h_align = 4;
        }
        if (s->codec_id == AV_CODEC_ID_INTERPLAY_VIDEO) {
            w_align = 8;
            h_align = 8;
        }
        break;
    case AV_PIX_FMT_PAL8:
    case AV_PIX_FMT_BGR8:
    case AV_PIX_FMT_RGB8:
        if (s->codec_id == AV_CODEC_ID_SMC ||
            s->codec_id == AV_CODEC_ID_CINEPAK) {
            w_align = 4;
            h_align = 4;
        }
        if (s->codec_id == AV_CODEC_ID_JV ||
            s->codec_id == AV_CODEC_ID_ARGO ||
            s->codec_id == AV_CODEC_ID_INTERPLAY_VIDEO) {
            w_align = 8;
            h_align = 8;
        }
        if (s->codec_id == AV_CODEC_ID_MJPEG   ||
            s->codec_id == AV_CODEC_ID_MJPEGB  ||
            s->codec_id == AV_CODEC_ID_LJPEG   ||
            s->codec_id == AV_CODEC_ID_SMVJPEG ||
            s->codec_id == AV_CODEC_ID_AMV     ||
            s->codec_id == AV_CODEC_ID_SP5X    ||
            s->codec_id == AV_CODEC_ID_JPEGLS) {
            w_align =   8;
            h_align = 2*8;
        }
        break;
    case AV_PIX_FMT_BGR24:
        if ((s->codec_id == AV_CODEC_ID_MSZH) ||
            (s->codec_id == AV_CODEC_ID_ZLIB)) {
            w_align = 4;
            h_align = 4;
        }
        break;
    case AV_PIX_FMT_RGB24:
        if (s->codec_id == AV_CODEC_ID_CINEPAK) {
            w_align = 4;
            h_align = 4;
        }
        break;
    case AV_PIX_FMT_BGR0:
        if (s->codec_id == AV_CODEC_ID_ARGO) {
            w_align = 8;
            h_align = 8;
        }
        break;
    default:
        break;
    }

    if (s->codec_id == AV_CODEC_ID_IFF_ILBM) {
        w_align = FFMAX(w_align, 8);
    }

    *width  = FFALIGN(*width, w_align);
    *height = FFALIGN(*height, h_align);
    if (s->codec_id == AV_CODEC_ID_H264 || s->lowres ||
        s->codec_id == AV_CODEC_ID_VC1  || s->codec_id == AV_CODEC_ID_WMV3 ||
        s->codec_id == AV_CODEC_ID_VP5  || s->codec_id == AV_CODEC_ID_VP6 ||
        s->codec_id == AV_CODEC_ID_VP6F || s->codec_id == AV_CODEC_ID_VP6A
    ) {
        // some of the optimized chroma MC reads one line too much
        // which is also done in mpeg decoders with lowres > 0
        *height += 2;

        // H.264 uses edge emulation for out of frame motion vectors, for this
        // it requires a temporary area large enough to hold a 21x21 block,
        // increasing witdth ensure that the temporary area is large enough,
        // the next rounded up width is 32
        *width = FFMAX(*width, 32);
    }
    if (s->codec_id == AV_CODEC_ID_SVQ3) {
        *width = FFMAX(*width, 32);
    }

    for (i = 0; i < 4; i++)
        linesize_align[i] = STRIDE_ALIGN;
}

void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
{
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
    int chroma_shift = desc->log2_chroma_w;
    int linesize_align[AV_NUM_DATA_POINTERS];
    int align;

    avcodec_align_dimensions2(s, width, height, linesize_align);
    align               = FFMAX(linesize_align[0], linesize_align[3]);
    linesize_align[1] <<= chroma_shift;
    linesize_align[2] <<= chroma_shift;
    align               = FFMAX3(align, linesize_align[1], linesize_align[2]);
    *width              = FFALIGN(*width, align);
}
#if FF_API_AVCODEC_CHROMA_POS
int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos)
{
    return av_chroma_location_enum_to_pos(xpos, ypos, pos);
}

enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos)
{
    return av_chroma_location_pos_to_enum(xpos, ypos);
}
#endif

int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
                             enum AVSampleFormat sample_fmt, const uint8_t *buf,
                             int buf_size, int align)
{
    int ch, planar, needed_size, ret = 0;

    needed_size = av_samples_get_buffer_size(NULL, nb_channels,
                                             frame->nb_samples, sample_fmt,
                                             align);
    if (buf_size < needed_size)
        return AVERROR(EINVAL);

    planar = av_sample_fmt_is_planar(sample_fmt);
    if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
        if (!FF_ALLOCZ_TYPED_ARRAY(frame->extended_data, nb_channels))
            return AVERROR(ENOMEM);
    } else {
        frame->extended_data = frame->data;
    }

    if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
                                      (uint8_t *)(intptr_t)buf, nb_channels, frame->nb_samples,
                                      sample_fmt, align)) < 0) {
        if (frame->extended_data != frame->data)
            av_freep(&frame->extended_data);
        return ret;
    }
    if (frame->extended_data != frame->data) {
        for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
            frame->data[ch] = frame->extended_data[ch];
    }

    return ret;
}

void ff_color_frame(AVFrame *frame, const int c[4])
{
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
    int p, y;

    av_assert0(desc->flags & AV_PIX_FMT_FLAG_PLANAR);

    for (p = 0; p<desc->nb_components; p++) {
        uint8_t *dst = frame->data[p];
        int is_chroma = p == 1 || p == 2;
        int bytes  = is_chroma ? AV_CEIL_RSHIFT(frame->width,  desc->log2_chroma_w) : frame->width;
        int height = is_chroma ? AV_CEIL_RSHIFT(frame->height, desc->log2_chroma_h) : frame->height;
        if (desc->comp[0].depth >= 9) {
            ((uint16_t*)dst)[0] = c[p];
            av_memcpy_backptr(dst + 2, 2, bytes - 2);
            dst += frame->linesize[p];
            for (y = 1; y < height; y++) {
                memcpy(dst, frame->data[p], 2*bytes);
                dst += frame->linesize[p];
            }
        } else {
            for (y = 0; y < height; y++) {
                memset(dst, c[p], bytes);
                dst += frame->linesize[p];
            }
        }
    }
}

int avpriv_codec_get_cap_skip_frame_fill_param(const AVCodec *codec){
    return !!(ffcodec(codec)->caps_internal & FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM);
}

const char *avcodec_get_name(enum AVCodecID id)
{
    const AVCodecDescriptor *cd;
    const AVCodec *codec;

    if (id == AV_CODEC_ID_NONE)
        return "none";
    cd = avcodec_descriptor_get(id);
    if (cd)
        return cd->name;
    av_log(NULL, AV_LOG_WARNING, "Codec 0x%x is not in the full list.\n", id);
    codec = avcodec_find_decoder(id);
    if (codec)
        return codec->name;
    codec = avcodec_find_encoder(id);
    if (codec)
        return codec->name;
    return "unknown_codec";
}

const char *av_get_profile_name(const AVCodec *codec, int profile)
{
    const AVProfile *p;
    if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
        return NULL;

    for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
        if (p->profile == profile)
            return p->name;

    return NULL;
}

const char *avcodec_profile_name(enum AVCodecID codec_id, int profile)
{
    const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
    const AVProfile *p;

    if (profile == FF_PROFILE_UNKNOWN || !desc || !desc->profiles)
        return NULL;

    for (p = desc->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
        if (p->profile == profile)
            return p->name;

    return NULL;
}

int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
{
    switch (codec_id) {
    case AV_CODEC_ID_DFPWM:
        return 1;
    case AV_CODEC_ID_8SVX_EXP:
    case AV_CODEC_ID_8SVX_FIB:
    case AV_CODEC_ID_ADPCM_ARGO:
    case AV_CODEC_ID_ADPCM_CT:
    case AV_CODEC_ID_ADPCM_IMA_ALP:
    case AV_CODEC_ID_ADPCM_IMA_AMV:
    case AV_CODEC_ID_ADPCM_IMA_APC:
    case AV_CODEC_ID_ADPCM_IMA_APM:
    case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
    case AV_CODEC_ID_ADPCM_IMA_OKI:
    case AV_CODEC_ID_ADPCM_IMA_WS:
    case AV_CODEC_ID_ADPCM_IMA_SSI:
    case AV_CODEC_ID_ADPCM_G722:
    case AV_CODEC_ID_ADPCM_YAMAHA:
    case AV_CODEC_ID_ADPCM_AICA:
        return 4;
    case AV_CODEC_ID_DSD_LSBF:
    case AV_CODEC_ID_DSD_MSBF:
    case AV_CODEC_ID_DSD_LSBF_PLANAR:
    case AV_CODEC_ID_DSD_MSBF_PLANAR:
    case AV_CODEC_ID_PCM_ALAW:
    case AV_CODEC_ID_PCM_MULAW:
    case AV_CODEC_ID_PCM_VIDC:
    case AV_CODEC_ID_PCM_S8:
    case AV_CODEC_ID_PCM_S8_PLANAR:
    case AV_CODEC_ID_PCM_SGA:
    case AV_CODEC_ID_PCM_U8:
    case AV_CODEC_ID_SDX2_DPCM:
    case AV_CODEC_ID_CBD2_DPCM:
    case AV_CODEC_ID_DERF_DPCM:
    case AV_CODEC_ID_WADY_DPCM:
        return 8;
    case AV_CODEC_ID_PCM_S16BE:
    case AV_CODEC_ID_PCM_S16BE_PLANAR:
    case AV_CODEC_ID_PCM_S16LE:
    case AV_CODEC_ID_PCM_S16LE_PLANAR:
    case AV_CODEC_ID_PCM_U16BE:
    case AV_CODEC_ID_PCM_U16LE:
        return 16;
    case AV_CODEC_ID_PCM_S24DAUD:
    case AV_CODEC_ID_PCM_S24BE:
    case AV_CODEC_ID_PCM_S24LE:
    case AV_CODEC_ID_PCM_S24LE_PLANAR:
    case AV_CODEC_ID_PCM_U24BE:
    case AV_CODEC_ID_PCM_U24LE:
        return 24;
    case AV_CODEC_ID_PCM_S32BE:
    case AV_CODEC_ID_PCM_S32LE:
    case AV_CODEC_ID_PCM_S32LE_PLANAR:
    case AV_CODEC_ID_PCM_U32BE:
    case AV_CODEC_ID_PCM_U32LE:
    case AV_CODEC_ID_PCM_F32BE:
    case AV_CODEC_ID_PCM_F32LE:
    case AV_CODEC_ID_PCM_F24LE:
    case AV_CODEC_ID_PCM_F16LE:
        return 32;
    case AV_CODEC_ID_PCM_F64BE:
    case AV_CODEC_ID_PCM_F64LE:
    case AV_CODEC_ID_PCM_S64BE:
    case AV_CODEC_ID_PCM_S64LE:
        return 64;
    default:
        return 0;
    }
}

enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be)
{
    static const enum AVCodecID map[][2] = {
        [AV_SAMPLE_FMT_U8  ] = { AV_CODEC_ID_PCM_U8,    AV_CODEC_ID_PCM_U8    },
        [AV_SAMPLE_FMT_S16 ] = { AV_CODEC_ID_PCM_S16LE, AV_CODEC_ID_PCM_S16BE },
        [AV_SAMPLE_FMT_S32 ] = { AV_CODEC_ID_PCM_S32LE, AV_CODEC_ID_PCM_S32BE },
        [AV_SAMPLE_FMT_FLT ] = { AV_CODEC_ID_PCM_F32LE, AV_CODEC_ID_PCM_F32BE },
        [AV_SAMPLE_FMT_DBL ] = { AV_CODEC_ID_PCM_F64LE, AV_CODEC_ID_PCM_F64BE },
        [AV_SAMPLE_FMT_U8P ] = { AV_CODEC_ID_PCM_U8,    AV_CODEC_ID_PCM_U8    },
        [AV_SAMPLE_FMT_S16P] = { AV_CODEC_ID_PCM_S16LE, AV_CODEC_ID_PCM_S16BE },
        [AV_SAMPLE_FMT_S32P] = { AV_CODEC_ID_PCM_S32LE, AV_CODEC_ID_PCM_S32BE },
        [AV_SAMPLE_FMT_S64P] = { AV_CODEC_ID_PCM_S64LE, AV_CODEC_ID_PCM_S64BE },
        [AV_SAMPLE_FMT_FLTP] = { AV_CODEC_ID_PCM_F32LE, AV_CODEC_ID_PCM_F32BE },
        [AV_SAMPLE_FMT_DBLP] = { AV_CODEC_ID_PCM_F64LE, AV_CODEC_ID_PCM_F64BE },
    };
    if (fmt < 0 || fmt >= FF_ARRAY_ELEMS(map))
        return AV_CODEC_ID_NONE;
    if (be < 0 || be > 1)
        be = AV_NE(1, 0);
    return map[fmt][be];
}

int av_get_bits_per_sample(enum AVCodecID codec_id)
{
    switch (codec_id) {
    case AV_CODEC_ID_DFPWM:
        return 1;
    case AV_CODEC_ID_ADPCM_SBPRO_2:
        return 2;
    case AV_CODEC_ID_ADPCM_SBPRO_3:
        return 3;
    case AV_CODEC_ID_ADPCM_SBPRO_4:
    case AV_CODEC_ID_ADPCM_IMA_WAV:
    case AV_CODEC_ID_ADPCM_IMA_QT:
    case AV_CODEC_ID_ADPCM_SWF:
    case AV_CODEC_ID_ADPCM_MS:
        return 4;
    default:
        return av_get_exact_bits_per_sample(codec_id);
    }
}

static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,
                                    uint32_t tag, int bits_per_coded_sample, int64_t bitrate,
                                    uint8_t * extradata, int frame_size, int frame_bytes)
{
    int bps = av_get_exact_bits_per_sample(id);
    int framecount = (ba > 0 && frame_bytes / ba > 0) ? frame_bytes / ba : 1;

    /* codecs with an exact constant bits per sample */
    if (bps > 0 && ch > 0 && frame_bytes > 0 && ch < 32768 && bps < 32768)
        return (frame_bytes * 8LL) / (bps * ch);
    bps = bits_per_coded_sample;

    /* codecs with a fixed packet duration */
    switch (id) {
    case AV_CODEC_ID_ADPCM_ADX:    return   32;
    case AV_CODEC_ID_ADPCM_IMA_QT: return   64;
    case AV_CODEC_ID_ADPCM_EA_XAS: return  128;
    case AV_CODEC_ID_AMR_NB:
    case AV_CODEC_ID_EVRC:
    case AV_CODEC_ID_GSM:
    case AV_CODEC_ID_QCELP:
    case AV_CODEC_ID_RA_288:       return  160;
    case AV_CODEC_ID_AMR_WB:
    case AV_CODEC_ID_GSM_MS:       return  320;
    case AV_CODEC_ID_MP1:          return  384;
    case AV_CODEC_ID_ATRAC1:       return  512;
    case AV_CODEC_ID_ATRAC9:
    case AV_CODEC_ID_ATRAC3:
        if (framecount > INT_MAX/1024)
            return 0;
        return 1024 * framecount;
    case AV_CODEC_ID_ATRAC3P:      return 2048;
    case AV_CODEC_ID_MP2:
    case AV_CODEC_ID_MUSEPACK7:    return 1152;
    case AV_CODEC_ID_AC3:          return 1536;
    case AV_CODEC_ID_FTR:          return 1024;
    }

    if (sr > 0) {
        /* calc from sample rate */
        if (id == AV_CODEC_ID_TTA)
            return 256 * sr / 245;
        else if (id == AV_CODEC_ID_DST)
            return 588 * sr / 44100;
        else if (id == AV_CODEC_ID_BINKAUDIO_DCT) {
            if (sr / 22050 > 22)
                return 0;
            return (480 << (sr / 22050));
        }

        if (id == AV_CODEC_ID_MP3)
            return sr <= 24000 ? 576 : 1152;
    }

    if (ba > 0) {
        /* calc from block_align */
        if (id == AV_CODEC_ID_SIPR) {
            switch (ba) {
            case 20: return 160;
            case 19: return 144;
            case 29: return 288;
            case 37: return 480;
            }
        } else if (id == AV_CODEC_ID_ILBC) {
            switch (ba) {
            case 38: return 160;
            case 50: return 240;
            }
        }
    }

    if (frame_bytes > 0) {
        /* calc from frame_bytes only */
        if (id == AV_CODEC_ID_TRUESPEECH)
            return 240 * (frame_bytes / 32);
        if (id == AV_CODEC_ID_NELLYMOSER)
            return 256 * (frame_bytes / 64);
        if (id == AV_CODEC_ID_RA_144)
            return 160 * (frame_bytes / 20);
        if (id == AV_CODEC_ID_APTX)
            return 4 * (frame_bytes / 4);
        if (id == AV_CODEC_ID_APTX_HD)
            return 4 * (frame_bytes / 6);

        if (bps > 0) {
            /* calc from frame_bytes and bits_per_coded_sample */
            if (id == AV_CODEC_ID_ADPCM_G726 || id == AV_CODEC_ID_ADPCM_G726LE)
                return frame_bytes * 8 / bps;
        }

        if (ch > 0 && ch < INT_MAX/16) {
            /* calc from frame_bytes and channels */
            switch (id) {
            case AV_CODEC_ID_FASTAUDIO:
                return frame_bytes / (40 * ch) * 256;
            case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
                return (frame_bytes - 4 * ch) / (128 * ch) * 256;
            case AV_CODEC_ID_ADPCM_AFC:
                return frame_bytes / (9 * ch) * 16;
            case AV_CODEC_ID_ADPCM_PSX:
            case AV_CODEC_ID_ADPCM_DTK:
                frame_bytes /= 16 * ch;
                if (frame_bytes > INT_MAX / 28)
                    return 0;
                return frame_bytes * 28;
            case AV_CODEC_ID_ADPCM_4XM:
            case AV_CODEC_ID_ADPCM_IMA_ACORN:
            case AV_CODEC_ID_ADPCM_IMA_DAT4:
            case AV_CODEC_ID_ADPCM_IMA_ISS:
                return (frame_bytes - 4 * ch) * 2 / ch;
            case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
                return (frame_bytes - 4) * 2 / ch;
            case AV_CODEC_ID_ADPCM_IMA_AMV:
                return (frame_bytes - 8) * 2;
            case AV_CODEC_ID_ADPCM_THP:
            case AV_CODEC_ID_ADPCM_THP_LE:
                if (extradata)
                    return frame_bytes * 14LL / (8 * ch);
                break;
            case AV_CODEC_ID_ADPCM_XA:
                return (frame_bytes / 128) * 224 / ch;
            case AV_CODEC_ID_INTERPLAY_DPCM:
                return (frame_bytes - 6 - ch) / ch;
            case AV_CODEC_ID_ROQ_DPCM:
                return (frame_bytes - 8) / ch;
            case AV_CODEC_ID_XAN_DPCM:
                return (frame_bytes - 2 * ch) / ch;
            case AV_CODEC_ID_MACE3:
                return 3 * frame_bytes / ch;
            case AV_CODEC_ID_MACE6:
                return 6 * frame_bytes / ch;
            case AV_CODEC_ID_PCM_LXF:
                return 2 * (frame_bytes / (5 * ch));
            case AV_CODEC_ID_IAC:
            case AV_CODEC_ID_IMC:
                return 4 * frame_bytes / ch;
            }

            if (tag) {
                /* calc from frame_bytes, channels, and codec_tag */
                if (id == AV_CODEC_ID_SOL_DPCM) {
                    if (tag == 3)
                        return frame_bytes / ch;
                    else
                        return frame_bytes * 2 / ch;
                }
            }

            if (ba > 0) {
                /* calc from frame_bytes, channels, and block_align */
                int blocks = frame_bytes / ba;
                int64_t tmp = 0;
                switch (id) {
                case AV_CODEC_ID_ADPCM_IMA_WAV:
                    if (bps < 2 || bps > 5)
                        return 0;
                    tmp = blocks * (1LL + (ba - 4 * ch) / (bps * ch) * 8);
                    break;
                case AV_CODEC_ID_ADPCM_IMA_DK3:
                    tmp = blocks * (((ba - 16LL) * 2 / 3 * 4) / ch);
                    break;
                case AV_CODEC_ID_ADPCM_IMA_DK4:
                    tmp = blocks * (1 + (ba - 4LL * ch) * 2 / ch);
                    break;
                case AV_CODEC_ID_ADPCM_IMA_RAD:
                    tmp = blocks * ((ba - 4LL * ch) * 2 / ch);
                    break;
                case AV_CODEC_ID_ADPCM_MS:
                    tmp = blocks * (2 + (ba - 7LL * ch) * 2LL / ch);
                    break;
                case AV_CODEC_ID_ADPCM_MTAF:
                    tmp = blocks * (ba - 16LL) * 2 / ch;
                    break;
                case AV_CODEC_ID_ADPCM_XMD:
                    tmp = blocks * 32;
                    break;
                }
                if (tmp) {
                    if (tmp != (int)tmp)
                        return 0;
                    return tmp;
                }
            }

            if (bps > 0) {
                /* calc from frame_bytes, channels, and bits_per_coded_sample */
                switch (id) {
                case AV_CODEC_ID_PCM_DVD:
                    if(bps<4 || frame_bytes<3)
                        return 0;
                    return 2 * ((frame_bytes - 3) / ((bps * 2 / 8) * ch));
                case AV_CODEC_ID_PCM_BLURAY:
                    if(bps<4 || frame_bytes<4)
                        return 0;
                    return (frame_bytes - 4) / ((FFALIGN(ch, 2) * bps) / 8);
                case AV_CODEC_ID_S302M:
                    return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
                }
            }
        }
    }

    /* Fall back on using frame_size */
    if (frame_size > 1 && frame_bytes)
        return frame_size;

    //For WMA we currently have no other means to calculate duration thus we
    //do it here by assuming CBR, which is true for all known cases.
    if (bitrate > 0 && frame_bytes > 0 && sr > 0 && ba > 1) {
        if (id == AV_CODEC_ID_WMAV1 || id == AV_CODEC_ID_WMAV2)
            return  (frame_bytes * 8LL * sr) / bitrate;
    }

    return 0;
}

int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
{
   int channels = avctx->ch_layout.nb_channels;
   int duration;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
    if (!channels)
        channels = avctx->channels;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
    duration = get_audio_frame_duration(avctx->codec_id, avctx->sample_rate,
                                    channels, avctx->block_align,
                                    avctx->codec_tag, avctx->bits_per_coded_sample,
                                    avctx->bit_rate, avctx->extradata, avctx->frame_size,
                                    frame_bytes);
    return FFMAX(0, duration);
}

int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
{
   int channels = par->ch_layout.nb_channels;
   int duration;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
    if (!channels)
        channels = par->channels;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
    duration = get_audio_frame_duration(par->codec_id, par->sample_rate,
                                    channels, par->block_align,
                                    par->codec_tag, par->bits_per_coded_sample,
                                    par->bit_rate, par->extradata, par->frame_size,
                                    frame_bytes);
    return FFMAX(0, duration);
}

#if !HAVE_THREADS
int ff_thread_init(AVCodecContext *s)
{
    return -1;
}

#endif

unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
{
    unsigned int n = 0;

    while (v >= 0xff) {
        *s++ = 0xff;
        v -= 0xff;
        n++;
    }
    *s = v;
    n++;
    return n;
}

int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
{
    int i;
    for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;
    return i;
}

const AVCodecHWConfig *avcodec_get_hw_config(const AVCodec *avcodec, int index)
{
    const FFCodec *const codec = ffcodec(avcodec);
    int i;
    if (!codec->hw_configs || index < 0)
        return NULL;
    for (i = 0; i <= index; i++)
        if (!codec->hw_configs[i])
            return NULL;
    return &codec->hw_configs[index]->public;
}

int ff_thread_ref_frame(ThreadFrame *dst, const ThreadFrame *src)
{
    int ret;

    dst->owner[0] = src->owner[0];
    dst->owner[1] = src->owner[1];

    ret = av_frame_ref(dst->f, src->f);
    if (ret < 0)
        return ret;

    av_assert0(!dst->progress);

    if (src->progress &&
        !(dst->progress = av_buffer_ref(src->progress))) {
        ff_thread_release_ext_buffer(dst->owner[0], dst);
        return AVERROR(ENOMEM);
    }

    return 0;
}

#if !HAVE_THREADS

int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f, int flags)
{
    return ff_get_buffer(avctx, f, flags);
}

int ff_thread_get_ext_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
{
    f->owner[0] = f->owner[1] = avctx;
    return ff_get_buffer(avctx, f->f, flags);
}

void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
{
    if (f)
        av_frame_unref(f);
}

void ff_thread_release_ext_buffer(AVCodecContext *avctx, ThreadFrame *f)
{
    f->owner[0] = f->owner[1] = NULL;
    if (f->f)
        av_frame_unref(f->f);
}

void ff_thread_finish_setup(AVCodecContext *avctx)
{
}

void ff_thread_report_progress(ThreadFrame *f, int progress, int field)
{
}

void ff_thread_await_progress(const ThreadFrame *f, int progress, int field)
{
}

int ff_thread_can_start_frame(AVCodecContext *avctx)
{
    return 1;
}

int ff_slice_thread_init_progress(AVCodecContext *avctx)
{
    return 0;
}

int ff_slice_thread_allocz_entries(AVCodecContext *avctx, int count)
{
    return 0;
}

void ff_thread_await_progress2(AVCodecContext *avctx, int field, int thread, int shift)
{
}

void ff_thread_report_progress2(AVCodecContext *avctx, int field, int thread, int n)
{
}

#endif

const uint8_t *avpriv_find_start_code(const uint8_t *av_restrict p,
                                      const uint8_t *end,
                                      uint32_t *av_restrict state)
{
    int i;

    av_assert0(p <= end);
    if (p >= end)
        return end;

    for (i = 0; i < 3; i++) {
        uint32_t tmp = *state << 8;
        *state = tmp + *(p++);
        if (tmp == 0x100 || p == end)
            return p;
    }

    while (p < end) {
        if      (p[-1] > 1      ) p += 3;
        else if (p[-2]          ) p += 2;
        else if (p[-3]|(p[-1]-1)) p++;
        else {
            p++;
            break;
        }
    }

    p = FFMIN(p, end) - 4;
    *state = AV_RB32(p);

    return p + 4;
}

AVCPBProperties *av_cpb_properties_alloc(size_t *size)
{
    AVCPBProperties *props = av_mallocz(sizeof(AVCPBProperties));
    if (!props)
        return NULL;

    if (size)
        *size = sizeof(*props);

    props->vbv_delay = UINT64_MAX;

    return props;
}

AVCPBProperties *ff_add_cpb_side_data(AVCodecContext *avctx)
{
    AVPacketSideData *tmp;
    AVCPBProperties  *props;
    size_t size;
    int i;

    for (i = 0; i < avctx->nb_coded_side_data; i++)
        if (avctx->coded_side_data[i].type == AV_PKT_DATA_CPB_PROPERTIES)
            return (AVCPBProperties *)avctx->coded_side_data[i].data;

    props = av_cpb_properties_alloc(&size);
    if (!props)
        return NULL;

    tmp = av_realloc_array(avctx->coded_side_data, avctx->nb_coded_side_data + 1, sizeof(*tmp));
    if (!tmp) {
        av_freep(&props);
        return NULL;
    }

    avctx->coded_side_data = tmp;
    avctx->nb_coded_side_data++;

    avctx->coded_side_data[avctx->nb_coded_side_data - 1].type = AV_PKT_DATA_CPB_PROPERTIES;
    avctx->coded_side_data[avctx->nb_coded_side_data - 1].data = (uint8_t*)props;
    avctx->coded_side_data[avctx->nb_coded_side_data - 1].size = size;

    return props;
}

static unsigned bcd2uint(uint8_t bcd)
{
    unsigned low  = bcd & 0xf;
    unsigned high = bcd >> 4;
    if (low > 9 || high > 9)
        return 0;
    return low + 10*high;
}

int ff_alloc_timecode_sei(const AVFrame *frame, AVRational rate, size_t prefix_len,
                     void **data, size_t *sei_size)
{
    AVFrameSideData *sd = NULL;
    uint8_t *sei_data;
    PutBitContext pb;
    uint32_t *tc;
    int m;

    if (frame)
        sd = av_frame_get_side_data(frame, AV_FRAME_DATA_S12M_TIMECODE);

    if (!sd) {
        *data = NULL;
        return 0;
    }
    tc =  (uint32_t*)sd->data;
    m  = tc[0] & 3;

    *sei_size = sizeof(uint32_t) * 4;
    *data = av_mallocz(*sei_size + prefix_len);
    if (!*data)
        return AVERROR(ENOMEM);
    sei_data = (uint8_t*)*data + prefix_len;

    init_put_bits(&pb, sei_data, *sei_size);
    put_bits(&pb, 2, m); // num_clock_ts

    for (int j = 1; j <= m; j++) {
        uint32_t tcsmpte = tc[j];
        unsigned hh   = bcd2uint(tcsmpte     & 0x3f);    // 6-bit hours
        unsigned mm   = bcd2uint(tcsmpte>>8  & 0x7f);    // 7-bit minutes
        unsigned ss   = bcd2uint(tcsmpte>>16 & 0x7f);    // 7-bit seconds
        unsigned ff   = bcd2uint(tcsmpte>>24 & 0x3f);    // 6-bit frames
        unsigned drop = tcsmpte & 1<<30 && !0;  // 1-bit drop if not arbitrary bit

        /* Calculate frame number of HEVC by SMPTE ST 12-1:2014 Sec 12.2 if rate > 30FPS */
        if (av_cmp_q(rate, (AVRational) {30, 1}) == 1) {
            unsigned pc;
            ff *= 2;
            if (av_cmp_q(rate, (AVRational) {50, 1}) == 0)
                pc = !!(tcsmpte & 1 << 7);
            else
                pc = !!(tcsmpte & 1 << 23);
            ff = (ff + pc) & 0x7f;
        }

        put_bits(&pb, 1, 1); // clock_timestamp_flag
        put_bits(&pb, 1, 1); // units_field_based_flag
        put_bits(&pb, 5, 0); // counting_type
        put_bits(&pb, 1, 1); // full_timestamp_flag
        put_bits(&pb, 1, 0); // discontinuity_flag
        put_bits(&pb, 1, drop);
        put_bits(&pb, 9, ff);
        put_bits(&pb, 6, ss);
        put_bits(&pb, 6, mm);
        put_bits(&pb, 5, hh);
        put_bits(&pb, 5, 0);
    }
    flush_put_bits(&pb);

    return 0;
}

int64_t ff_guess_coded_bitrate(AVCodecContext *avctx)
{
    AVRational framerate = avctx->framerate;
    int bits_per_coded_sample = avctx->bits_per_coded_sample;
    int64_t bitrate;

    if (!(framerate.num && framerate.den))
        framerate = av_inv_q(avctx->time_base);
    if (!(framerate.num && framerate.den))
        return 0;

    if (!bits_per_coded_sample) {
        const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
        bits_per_coded_sample = av_get_bits_per_pixel(desc);
    }
    bitrate = (int64_t)bits_per_coded_sample * avctx->width * avctx->height *
              framerate.num / framerate.den;

    return bitrate;
}

int ff_int_from_list_or_default(void *ctx, const char * val_name, int val,
                                const int * array_valid_values, int default_value)
{
    int i = 0, ref_val;

    while (1) {
        ref_val = array_valid_values[i];
        if (ref_val == INT_MAX)
            break;
        if (val == ref_val)
            return val;
        i++;
    }
    /* val is not a valid value */
    av_log(ctx, AV_LOG_DEBUG,
           "%s %d are not supported. Set to default value : %d\n", val_name, val, default_value);
    return default_value;
}