summaryrefslogtreecommitdiff
path: root/libavcodec/tiff.c
blob: 43d12db14a392bc55d12b3b5a34859345b408aa4 (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
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
/*
 * Copyright (c) 2006 Konstantin Shishkov
 *
 * 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
 * TIFF image decoder
 * @author Konstantin Shishkov
 */

#include "avcodec.h"
#include "bytestream.h"
#include "config.h"
#if CONFIG_ZLIB
#include <zlib.h>
#endif
#include "lzw.h"
#include "tiff.h"
#include "tiff_data.h"
#include "faxcompr.h"
#include "internal.h"
#include "mathops.h"
#include "libavutil/attributes.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "libavutil/avstring.h"

typedef struct TiffContext {
    AVCodecContext *avctx;
    AVFrame picture;
    GetByteContext gb;

    int width, height;
    unsigned int bpp, bppcount;
    uint32_t palette[256];
    int palette_is_set;
    int le;
    enum TiffCompr compr;
    int invert;
    int fax_opts;
    int predictor;
    int fill_order;

    int strips, rps, sstype;
    int sot;
    int stripsizesoff, stripsize, stripoff, strippos;
    LZWState *lzw;

    uint8_t *deinvert_buf;
    int deinvert_buf_size;

    int geotag_count;
    TiffGeoTag *geotags;
} TiffContext;

static unsigned tget_short(GetByteContext *gb, int le)
{
    unsigned v = le ? bytestream2_get_le16(gb) : bytestream2_get_be16(gb);
    return v;
}

static unsigned tget_long(GetByteContext *gb, int le)
{
    unsigned v = le ? bytestream2_get_le32(gb) : bytestream2_get_be32(gb);
    return v;
}

static double tget_double(GetByteContext *gb, int le)
{
    av_alias64 i = { .u64 = le ? bytestream2_get_le64(gb) : bytestream2_get_be64(gb)};
    return i.f64;
}

static unsigned tget(GetByteContext *gb, int type, int le)
{
    switch (type) {
    case TIFF_BYTE : return bytestream2_get_byte(gb);
    case TIFF_SHORT: return tget_short(gb, le);
    case TIFF_LONG : return tget_long(gb, le);
    default        : return UINT_MAX;
    }
}

static void free_geotags(TiffContext *const s)
{
    int i;
    for (i = 0; i < s->geotag_count; i++) {
        if (s->geotags[i].val)
            av_freep(&s->geotags[i].val);
    }
    av_freep(&s->geotags);
}

#define RET_GEOKEY(TYPE, array, element)\
    if (key >= TIFF_##TYPE##_KEY_ID_OFFSET &&\
        key - TIFF_##TYPE##_KEY_ID_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_name_type_map))\
        return ff_tiff_##array##_name_type_map[key - TIFF_##TYPE##_KEY_ID_OFFSET].element;

static const char *get_geokey_name(int key)
{
    RET_GEOKEY(VERT, vert, name);
    RET_GEOKEY(PROJ, proj, name);
    RET_GEOKEY(GEOG, geog, name);
    RET_GEOKEY(CONF, conf, name);

    return NULL;
}

static int get_geokey_type(int key)
{
    RET_GEOKEY(VERT, vert, type);
    RET_GEOKEY(PROJ, proj, type);
    RET_GEOKEY(GEOG, geog, type);
    RET_GEOKEY(CONF, conf, type);

    return AVERROR_INVALIDDATA;
}

static int cmp_id_key(const void *id, const void *k)
{
    return *(const int*)id - ((const TiffGeoTagKeyName*)k)->key;
}

static const char *search_keyval(const TiffGeoTagKeyName *keys, int n, int id)
{
    TiffGeoTagKeyName *r = bsearch(&id, keys, n, sizeof(keys[0]), cmp_id_key);
    if(r)
        return r->name;

    return NULL;
}

static char *get_geokey_val(int key, int val)
{
    char *ap;

    if (val == TIFF_GEO_KEY_UNDEFINED)
        return av_strdup("undefined");
    if (val == TIFF_GEO_KEY_USER_DEFINED)
        return av_strdup("User-Defined");

#define RET_GEOKEY_VAL(TYPE, array)\
    if (val >= TIFF_##TYPE##_OFFSET &&\
        val - TIFF_##TYPE##_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_codes))\
        return av_strdup(ff_tiff_##array##_codes[val - TIFF_##TYPE##_OFFSET]);

    switch (key) {
    case TIFF_GT_MODEL_TYPE_GEOKEY:
        RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);
        break;
    case TIFF_GT_RASTER_TYPE_GEOKEY:
        RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);
        break;
    case TIFF_GEOG_LINEAR_UNITS_GEOKEY:
    case TIFF_PROJ_LINEAR_UNITS_GEOKEY:
    case TIFF_VERTICAL_UNITS_GEOKEY:
        RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);
        break;
    case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:
    case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:
        RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);
        break;
    case TIFF_GEOGRAPHIC_TYPE_GEOKEY:
        RET_GEOKEY_VAL(GCS_TYPE, gcs_type);
        RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);
        break;
    case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:
        RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);
        RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);
        break;
    case TIFF_GEOG_ELLIPSOID_GEOKEY:
        RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);
        break;
    case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:
        RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);
        break;
    case TIFF_PROJECTED_CS_TYPE_GEOKEY:
        ap = av_strdup(search_keyval(ff_tiff_proj_cs_type_codes, FF_ARRAY_ELEMS(ff_tiff_proj_cs_type_codes), val));
        if(ap) return ap;
        break;
    case TIFF_PROJECTION_GEOKEY:
        ap = av_strdup(search_keyval(ff_tiff_projection_codes, FF_ARRAY_ELEMS(ff_tiff_projection_codes), val));
        if(ap) return ap;
        break;
    case TIFF_PROJ_COORD_TRANS_GEOKEY:
        RET_GEOKEY_VAL(COORD_TRANS, coord_trans);
        break;
    case TIFF_VERTICAL_CS_TYPE_GEOKEY:
        RET_GEOKEY_VAL(VERT_CS, vert_cs);
        RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);
        break;

    }

    ap = av_malloc(14);
    if (ap)
        snprintf(ap, 14, "Unknown-%d", val);
    return ap;
}

static char *doubles2str(double *dp, int count, const char *sep)
{
    int i;
    char *ap, *ap0;
    uint64_t component_len;
    if (!sep) sep = ", ";
    component_len = 15LL + strlen(sep);
    if (count >= (INT_MAX - 1)/component_len)
        return NULL;
    ap = av_malloc(component_len * count + 1);
    if (!ap)
        return NULL;
    ap0   = ap;
    ap[0] = '\0';
    for (i = 0; i < count; i++) {
        unsigned l = snprintf(ap, component_len, "%f%s", dp[i], sep);
        if(l >= component_len) {
            av_free(ap0);
            return NULL;
        }
        ap += l;
    }
    ap0[strlen(ap0) - strlen(sep)] = '\0';
    return ap0;
}

static char *shorts2str(int16_t *sp, int count, const char *sep)
{
    int i;
    char *ap, *ap0;
    uint64_t component_len;
    if (!sep) sep = ", ";
    component_len = 7LL + strlen(sep);
    if (count >= (INT_MAX - 1)/component_len)
        return NULL;
    ap = av_malloc(component_len * count + 1);
    if (!ap)
        return NULL;
    ap0   = ap;
    ap[0] = '\0';
    for (i = 0; i < count; i++) {
        unsigned l = snprintf(ap, component_len, "%d%s", sp[i], sep);
        if (l >= component_len) {
            av_free(ap0);
            return NULL;
        }
        ap += l;
    }
    ap0[strlen(ap0) - strlen(sep)] = '\0';
    return ap0;
}

static int add_doubles_metadata(int count,
                                const char *name, const char *sep,
                                TiffContext *s)
{
    char *ap;
    int i;
    double *dp;

    if (count >= INT_MAX / sizeof(int64_t) || count <= 0)
        return AVERROR_INVALIDDATA;
    if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))
        return AVERROR_INVALIDDATA;

    dp = av_malloc(count * sizeof(double));
    if (!dp)
        return AVERROR(ENOMEM);

    for (i = 0; i < count; i++)
        dp[i] = tget_double(&s->gb, s->le);
    ap = doubles2str(dp, count, sep);
    av_freep(&dp);
    if (!ap)
        return AVERROR(ENOMEM);
    av_dict_set(avpriv_frame_get_metadatap(&s->picture), name, ap, AV_DICT_DONT_STRDUP_VAL);
    return 0;
}

static int add_shorts_metadata(int count, const char *name,
                               const char *sep, TiffContext *s)
{
    char *ap;
    int i;
    int16_t *sp;

    if (count >= INT_MAX / sizeof(int16_t) || count <= 0)
        return AVERROR_INVALIDDATA;
    if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int16_t))
        return AVERROR_INVALIDDATA;

    sp = av_malloc(count * sizeof(int16_t));
    if (!sp)
        return AVERROR(ENOMEM);

    for (i = 0; i < count; i++)
        sp[i] = tget_short(&s->gb, s->le);
    ap = shorts2str(sp, count, sep);
    av_freep(&sp);
    if (!ap)
        return AVERROR(ENOMEM);
    av_dict_set(avpriv_frame_get_metadatap(&s->picture), name, ap, AV_DICT_DONT_STRDUP_VAL);
    return 0;
}

static int add_string_metadata(int count, const char *name,
                               TiffContext *s)
{
    char *value;

    if (bytestream2_get_bytes_left(&s->gb) < count || count < 0)
        return AVERROR_INVALIDDATA;

    value = av_malloc(count + 1);
    if (!value)
        return AVERROR(ENOMEM);

    bytestream2_get_bufferu(&s->gb, value, count);
    value[count] = 0;

    av_dict_set(avpriv_frame_get_metadatap(&s->picture), name, value, AV_DICT_DONT_STRDUP_VAL);
    return 0;
}

static int add_metadata(int count, int type,
                        const char *name, const char *sep, TiffContext *s)
{
    switch(type) {
    case TIFF_DOUBLE: return add_doubles_metadata(count, name, sep, s);
    case TIFF_SHORT : return add_shorts_metadata(count, name, sep, s);
    case TIFF_STRING: return add_string_metadata(count, name, s);
    default         : return AVERROR_INVALIDDATA;
    };
}

#if CONFIG_ZLIB
static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src,
                           int size)
{
    z_stream zstream = { 0 };
    int zret;

    zstream.next_in = (uint8_t *)src;
    zstream.avail_in = size;
    zstream.next_out = dst;
    zstream.avail_out = *len;
    zret = inflateInit(&zstream);
    if (zret != Z_OK) {
        av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
        return zret;
    }
    zret = inflate(&zstream, Z_SYNC_FLUSH);
    inflateEnd(&zstream);
    *len = zstream.total_out;
    return zret == Z_STREAM_END ? Z_OK : zret;
}
#endif

static void av_always_inline horizontal_fill(unsigned int bpp, uint8_t* dst,
                                             int usePtr, const uint8_t *src,
                                             uint8_t c, int width, int offset)
{
    switch (bpp) {
    case 1:
        while (--width >= 0) {
            dst[(width+offset)*8+7] = (usePtr ? src[width] : c)      & 0x1;
            dst[(width+offset)*8+6] = (usePtr ? src[width] : c) >> 1 & 0x1;
            dst[(width+offset)*8+5] = (usePtr ? src[width] : c) >> 2 & 0x1;
            dst[(width+offset)*8+4] = (usePtr ? src[width] : c) >> 3 & 0x1;
            dst[(width+offset)*8+3] = (usePtr ? src[width] : c) >> 4 & 0x1;
            dst[(width+offset)*8+2] = (usePtr ? src[width] : c) >> 5 & 0x1;
            dst[(width+offset)*8+1] = (usePtr ? src[width] : c) >> 6 & 0x1;
            dst[(width+offset)*8+0] = (usePtr ? src[width] : c) >> 7;
        }
        break;
    case 2:
        while (--width >= 0) {
            dst[(width+offset)*4+3] = (usePtr ? src[width] : c) & 0x3;
            dst[(width+offset)*4+2] = (usePtr ? src[width] : c) >> 2 & 0x3;
            dst[(width+offset)*4+1] = (usePtr ? src[width] : c) >> 4 & 0x3;
            dst[(width+offset)*4+0] = (usePtr ? src[width] : c) >> 6;
        }
        break;
    case 4:
        while (--width >= 0) {
            dst[(width+offset)*2+1] = (usePtr ? src[width] : c) & 0xF;
            dst[(width+offset)*2+0] = (usePtr ? src[width] : c) >> 4;
        }
        break;
    default:
        if (usePtr) {
            memcpy(dst + offset, src, width);
        } else {
            memset(dst + offset, c, width);
        }
    }
}

static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
                             const uint8_t *src, int size, int lines)
{
    int c, line, pixels, code, ret;
    const uint8_t *ssrc = src;
    int width = ((s->width * s->bpp) + 7) >> 3;

    if (size <= 0)
        return AVERROR_INVALIDDATA;

#if CONFIG_ZLIB
    if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
        uint8_t *src2 = NULL, *zbuf;
        unsigned long outlen;
        int i, ret;
        outlen = width * lines;
        zbuf = av_malloc(outlen);
        if (!zbuf)
            return AVERROR(ENOMEM);
        if (s->fill_order) {
            src2 = av_malloc((unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE);
            if (!src2) {
                av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
                av_free(zbuf);
                return AVERROR(ENOMEM);
            }
            for (i = 0; i < size; i++)
                src2[i] = ff_reverse[src[i]];
            memset(src2 + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
            src = src2;
        }
        ret = tiff_uncompress(zbuf, &outlen, src, size);
        if (ret != Z_OK) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Uncompressing failed (%lu of %lu) with error %d\n", outlen,
                   (unsigned long)width * lines, ret);
            av_free(src2);
            av_free(zbuf);
            return AVERROR_UNKNOWN;
        }
        src = zbuf;
        for (line = 0; line < lines; line++) {
            if(s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8){
                horizontal_fill(s->bpp, dst, 1, src, 0, width, 0);
            }else{
                memcpy(dst, src, width);
            }
            dst += stride;
            src += width;
        }
        av_free(src2);
        av_free(zbuf);
        return 0;
    }
#endif
    if (s->compr == TIFF_LZW) {
        if (s->fill_order) {
            int i;
            av_fast_padded_malloc(&s->deinvert_buf, &s->deinvert_buf_size, size);
            if (!s->deinvert_buf)
                return AVERROR(ENOMEM);
            for (i = 0; i < size; i++)
                s->deinvert_buf[i] = ff_reverse[src[i]];
            src = s->deinvert_buf;
            ssrc = src;
        }
        if (size > 1 && !src[0] && (src[1]&1)) {
            av_log(s->avctx, AV_LOG_ERROR, "Old style LZW is unsupported\n");
        }
        if ((ret = ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF)) < 0) {
            av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
            return ret;
        }
    }
    if (s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3
        || s->compr == TIFF_G4) {
        int i, ret = 0;
        uint8_t *src2 = av_malloc((unsigned)size +
                                  FF_INPUT_BUFFER_PADDING_SIZE);

        if (!src2) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Error allocating temporary buffer\n");
            return AVERROR(ENOMEM);
        }
        if (s->fax_opts & 2) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Uncompressed fax mode is not supported (yet)\n");
            av_free(src2);
            return AVERROR_INVALIDDATA;
        }
        if (!s->fill_order) {
            memcpy(src2, src, size);
        } else {
            for (i = 0; i < size; i++)
                src2[i] = ff_reverse[src[i]];
        }
        memset(src2 + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
        switch (s->compr) {
        case TIFF_CCITT_RLE:
        case TIFF_G3:
        case TIFF_G4:
            ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride,
                                  s->compr, s->fax_opts);
            break;
        }
        if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
            for (line = 0; line < lines; line++) {
                horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
                dst += stride;
            }
        av_free(src2);
        return ret;
    }
    for (line = 0; line < lines; line++) {
        if (src - ssrc > size) {
            av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
            return AVERROR_INVALIDDATA;
        }
        switch (s->compr) {
        case TIFF_RAW:
            if (ssrc + size - src < width)
                return AVERROR_INVALIDDATA;
            if (!s->fill_order) {
                horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
                                dst, 1, src, 0, width, 0);
            } else {
                int i;
                for (i = 0; i < width; i++)
                    dst[i] = ff_reverse[src[i]];
            }
            src += width;
            break;
        case TIFF_PACKBITS:
            for (pixels = 0; pixels < width;) {
                if (ssrc + size - src < 2) {
                    av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");
                    return AVERROR_INVALIDDATA;
                }
                code = (int8_t) * src++;
                if (code >= 0) {
                    code++;
                    if (pixels + code > width) {
                        av_log(s->avctx, AV_LOG_ERROR,
                               "Copy went out of bounds\n");
                        return AVERROR_INVALIDDATA;
                    }
                    if (ssrc + size - src < code) {
                        av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");
                        return AVERROR_INVALIDDATA;
                    }
                    horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
                                    dst, 1, src, 0, code, pixels);
                    src += code;
                    pixels += code;
                } else if (code != -128) { // -127..-1
                    code = (-code) + 1;
                    if (pixels + code > width) {
                        av_log(s->avctx, AV_LOG_ERROR,
                               "Run went out of bounds\n");
                        return AVERROR_INVALIDDATA;
                    }
                    c = *src++;
                    horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
                                    dst, 0, NULL, c, code, pixels);
                    pixels += code;
                }
            }
            break;
        case TIFF_LZW:
            pixels = ff_lzw_decode(s->lzw, dst, width);
            if (pixels < width) {
                av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n",
                       pixels, width);
                return AVERROR_INVALIDDATA;
            }
            if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
                horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
            break;
        }
        dst += stride;
    }
    return 0;
}

static int init_image(TiffContext *s)
{
    int i, ret;
    uint32_t *pal;

    switch (s->bpp * 10 + s->bppcount) {
    case 11:
        if (!s->palette_is_set) {
            s->avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
            break;
        }
    case 21:
    case 41:
    case 81:
        s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
        break;
    case 243:
        s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
        break;
    case 161:
        s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GRAY16LE : AV_PIX_FMT_GRAY16BE;
        break;
    case 162:
        s->avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
        break;
    case 324:
        s->avctx->pix_fmt = AV_PIX_FMT_RGBA;
        break;
    case 483:
        s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGB48LE : AV_PIX_FMT_RGB48BE;
        break;
    case 644:
        s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGBA64LE : AV_PIX_FMT_RGBA64BE;
        break;
    default:
        av_log(s->avctx, AV_LOG_ERROR,
               "This format is not supported (bpp=%d, bppcount=%d)\n",
               s->bpp, s->bppcount);
        return AVERROR_INVALIDDATA;
    }
    if (s->width != s->avctx->width || s->height != s->avctx->height) {
        if ((ret = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
            return ret;
        avcodec_set_dimensions(s->avctx, s->width, s->height);
    }
    if (s->picture.data[0])
        s->avctx->release_buffer(s->avctx, &s->picture);
    if ((ret = ff_get_buffer(s->avctx, &s->picture)) < 0) {
        av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
        return ret;
    }
    if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
        if (s->palette_is_set) {
            memcpy(s->picture.data[1], s->palette, sizeof(s->palette));
        } else {
            /* make default grayscale pal */
            pal = (uint32_t *) s->picture.data[1];
            for (i = 0; i < 1<<s->bpp; i++)
                pal[i] = 0xFFU << 24 | i * 255 / ((1<<s->bpp) - 1) * 0x010101;
        }
    }
    return 0;
}

static int tiff_decode_tag(TiffContext *s)
{
    unsigned tag, type, count, off, value = 0;
    int i, j, k, pos, start;
    int ret;
    uint32_t *pal;
    double *dp;

    tag   = tget_short(&s->gb, s->le);
    type  = tget_short(&s->gb, s->le);
    count = tget_long(&s->gb, s->le);
    off   = tget_long(&s->gb, s->le);
    start = bytestream2_tell(&s->gb);

    if (type == 0 || type >= FF_ARRAY_ELEMS(type_sizes)) {
        av_log(s->avctx, AV_LOG_DEBUG, "Unknown tiff type (%u) encountered\n",
               type);
        return 0;
    }

    if (count == 1) {
        switch (type) {
        case TIFF_BYTE:
        case TIFF_SHORT:
            bytestream2_seek(&s->gb, -4, SEEK_CUR);
            value = tget(&s->gb, type, s->le);
            break;
        case TIFF_LONG:
            value = off;
            break;
        case TIFF_STRING:
            if (count <= 4) {
                bytestream2_seek(&s->gb, -4, SEEK_CUR);
                break;
            }
        default:
            value = UINT_MAX;
            bytestream2_seek(&s->gb, off, SEEK_SET);
        }
    } else {
        if (count <= 4 && type_sizes[type] * count <= 4) {
            bytestream2_seek(&s->gb, -4, SEEK_CUR);
        } else {
            bytestream2_seek(&s->gb, off, SEEK_SET);
        }
    }

    switch (tag) {
    case TIFF_WIDTH:
        s->width = value;
        break;
    case TIFF_HEIGHT:
        s->height = value;
        break;
    case TIFF_BPP:
        s->bppcount = count;
        if (count > 4) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "This format is not supported (bpp=%d, %d components)\n",
                   s->bpp, count);
            return AVERROR_INVALIDDATA;
        }
        if (count == 1)
            s->bpp = value;
        else {
            switch (type) {
            case TIFF_BYTE:
                s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) +
                         ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
                break;
            case TIFF_SHORT:
            case TIFF_LONG:
                s->bpp = 0;
                if (bytestream2_get_bytes_left(&s->gb) < type_sizes[type] * count)
                    return AVERROR_INVALIDDATA;
                for (i = 0; i < count; i++)
                    s->bpp += tget(&s->gb, type, s->le);
                break;
            default:
                s->bpp = -1;
            }
        }
        break;
    case TIFF_SAMPLES_PER_PIXEL:
        if (count != 1) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Samples per pixel requires a single value, many provided\n");
            return AVERROR_INVALIDDATA;
        }
        if (value > 4U) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Samples per pixel %d is too large\n", value);
            return AVERROR_INVALIDDATA;
        }
        if (s->bppcount == 1)
            s->bpp *= value;
        s->bppcount = value;
        break;
    case TIFF_COMPR:
        s->compr = value;
        s->predictor = 0;
        switch (s->compr) {
        case TIFF_RAW:
        case TIFF_PACKBITS:
        case TIFF_LZW:
        case TIFF_CCITT_RLE:
            break;
        case TIFF_G3:
        case TIFF_G4:
            s->fax_opts = 0;
            break;
        case TIFF_DEFLATE:
        case TIFF_ADOBE_DEFLATE:
#if CONFIG_ZLIB
            break;
#else
            av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
            return AVERROR(ENOSYS);
#endif
        case TIFF_JPEG:
        case TIFF_NEWJPEG:
            av_log(s->avctx, AV_LOG_ERROR,
                   "JPEG compression is not supported\n");
            return AVERROR_PATCHWELCOME;
        default:
            av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n",
                   s->compr);
            return AVERROR_INVALIDDATA;
        }
        break;
    case TIFF_ROWSPERSTRIP:
        if (type == TIFF_LONG && value == UINT_MAX)
            value = s->height;
        if (value < 1) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Incorrect value of rows per strip\n");
            return AVERROR_INVALIDDATA;
        }
        s->rps = value;
        break;
    case TIFF_STRIP_OFFS:
        if (count == 1) {
            s->strippos = 0;
            s->stripoff = value;
        } else
            s->strippos = off;
        s->strips = count;
        if (s->strips == 1)
            s->rps = s->height;
        s->sot = type;
        if (s->strippos > bytestream2_size(&s->gb)) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Tag referencing position outside the image\n");
            return AVERROR_INVALIDDATA;
        }
        break;
    case TIFF_STRIP_SIZE:
        if (count == 1) {
            s->stripsizesoff = 0;
            s->stripsize = value;
            s->strips = 1;
        } else {
            s->stripsizesoff = off;
        }
        s->strips = count;
        s->sstype = type;
        if (s->stripsizesoff > bytestream2_size(&s->gb)) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Tag referencing position outside the image\n");
            return AVERROR_INVALIDDATA;
        }
        break;
    case TIFF_TILE_BYTE_COUNTS:
    case TIFF_TILE_LENGTH:
    case TIFF_TILE_OFFSETS:
    case TIFF_TILE_WIDTH:
        av_log(s->avctx, AV_LOG_ERROR, "Tiled images are not supported\n");
        return AVERROR_PATCHWELCOME;
        break;
    case TIFF_PREDICTOR:
        s->predictor = value;
        break;
    case TIFF_INVERT:
        switch (value) {
        case 0:
            s->invert = 1;
            break;
        case 1:
            s->invert = 0;
            break;
        case 2:
        case 3:
            break;
        default:
            av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n",
                   value);
            return AVERROR_INVALIDDATA;
        }
        break;
    case TIFF_FILL_ORDER:
        if (value < 1 || value > 2) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Unknown FillOrder value %d, trying default one\n", value);
            value = 1;
        }
        s->fill_order = value - 1;
        break;
    case TIFF_PAL:
        pal = (uint32_t *) s->palette;
        off = type_sizes[type];
        if (count / 3 > 256 || bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)
            return AVERROR_INVALIDDATA;
        off = (type_sizes[type] - 1) << 3;
        for (k = 2; k >= 0; k--) {
            for (i = 0; i < count / 3; i++) {
                if (k == 2)
                    pal[i] = 0xFFU << 24;
                j =  (tget(&s->gb, type, s->le) >> off) << (k * 8);
                pal[i] |= j;
            }
        }
        s->palette_is_set = 1;
        break;
    case TIFF_PLANAR:
        if (value == 2) {
            av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
            return AVERROR_PATCHWELCOME;
        }
        break;
    case TIFF_T4OPTIONS:
        if (s->compr == TIFF_G3)
            s->fax_opts = value;
        break;
    case TIFF_T6OPTIONS:
        if (s->compr == TIFF_G4)
            s->fax_opts = value;
        break;
#define ADD_METADATA(count, name, sep)\
    if ((ret = add_metadata(count, type, name, sep, s)) < 0) {\
        av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\
        return ret;\
    }
    case TIFF_MODEL_PIXEL_SCALE:
        ADD_METADATA(count, "ModelPixelScaleTag", NULL);
        break;
    case TIFF_MODEL_TRANSFORMATION:
        ADD_METADATA(count, "ModelTransformationTag", NULL);
        break;
    case TIFF_MODEL_TIEPOINT:
        ADD_METADATA(count, "ModelTiepointTag", NULL);
        break;
    case TIFF_GEO_KEY_DIRECTORY:
        ADD_METADATA(1, "GeoTIFF_Version", NULL);
        ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");
        s->geotag_count   = tget_short(&s->gb, s->le);
        if (s->geotag_count > count / 4 - 1) {
            s->geotag_count = count / 4 - 1;
            av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n");
        }
        if (bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4) {
            s->geotag_count = 0;
            return -1;
        }
        s->geotags = av_mallocz(sizeof(TiffGeoTag) * s->geotag_count);
        if (!s->geotags) {
            av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
            s->geotag_count = 0;
            return AVERROR(ENOMEM);
        }
        for (i = 0; i < s->geotag_count; i++) {
            s->geotags[i].key    = tget_short(&s->gb, s->le);
            s->geotags[i].type   = tget_short(&s->gb, s->le);
            s->geotags[i].count  = tget_short(&s->gb, s->le);

            if (!s->geotags[i].type)
                s->geotags[i].val  = get_geokey_val(s->geotags[i].key, tget_short(&s->gb, s->le));
            else
                s->geotags[i].offset = tget_short(&s->gb, s->le);
        }
        break;
    case TIFF_GEO_DOUBLE_PARAMS:
        if (count >= INT_MAX / sizeof(int64_t))
            return AVERROR_INVALIDDATA;
        if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))
            return AVERROR_INVALIDDATA;
        dp = av_malloc(count * sizeof(double));
        if (!dp) {
            av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
            return AVERROR(ENOMEM);
        }
        for (i = 0; i < count; i++)
            dp[i] = tget_double(&s->gb, s->le);
        for (i = 0; i < s->geotag_count; i++) {
            if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) {
                if (s->geotags[i].count == 0
                    || s->geotags[i].offset + s->geotags[i].count > count) {
                    av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);
                } else {
                    char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");
                    if (!ap) {
                        av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
                        av_freep(&dp);
                        return AVERROR(ENOMEM);
                    }
                    s->geotags[i].val = ap;
                }
            }
        }
        av_freep(&dp);
        break;
    case TIFF_GEO_ASCII_PARAMS:
        pos = bytestream2_tell(&s->gb);
        for (i = 0; i < s->geotag_count; i++) {
            if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) {
                if (s->geotags[i].count == 0
                    || s->geotags[i].offset +  s->geotags[i].count > count) {
                    av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);
                } else {
                    char *ap;

                    bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);
                    if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)
                        return AVERROR_INVALIDDATA;
                    ap = av_malloc(s->geotags[i].count);
                    if (!ap) {
                        av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
                        return AVERROR(ENOMEM);
                    }
                    bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);
                    ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte
                    s->geotags[i].val = ap;
                }
            }
        }
        break;
    case TIFF_ARTIST:
        ADD_METADATA(count, "artist", NULL);
        break;
    case TIFF_COPYRIGHT:
        ADD_METADATA(count, "copyright", NULL);
        break;
    case TIFF_DATE:
        ADD_METADATA(count, "date", NULL);
        break;
    case TIFF_DOCUMENT_NAME:
        ADD_METADATA(count, "document_name", NULL);
        break;
    case TIFF_HOST_COMPUTER:
        ADD_METADATA(count, "computer", NULL);
        break;
    case TIFF_IMAGE_DESCRIPTION:
        ADD_METADATA(count, "description", NULL);
        break;
    case TIFF_MAKE:
        ADD_METADATA(count, "make", NULL);
        break;
    case TIFF_MODEL:
        ADD_METADATA(count, "model", NULL);
        break;
    case TIFF_PAGE_NAME:
        ADD_METADATA(count, "page_name", NULL);
        break;
    case TIFF_PAGE_NUMBER:
        ADD_METADATA(count, "page_number", " / ");
        break;
    case TIFF_SOFTWARE_NAME:
        ADD_METADATA(count, "software", NULL);
        break;
    default:
        av_log(s->avctx, AV_LOG_DEBUG, "Unknown or unsupported tag %d/0X%0X\n",
               tag, tag);
    }
    bytestream2_seek(&s->gb, start, SEEK_SET);
    return 0;
}

static int decode_frame(AVCodecContext *avctx,
                        void *data, int *got_frame, AVPacket *avpkt)
{
    TiffContext *const s = avctx->priv_data;
    AVFrame *picture = data;
    AVFrame *const p = &s->picture;
    unsigned off;
    int id, le, ret;
    int i, j, entries;
    int stride;
    unsigned soff, ssize;
    uint8_t *dst;
    GetByteContext stripsizes;
    GetByteContext stripdata;

    bytestream2_init(&s->gb, avpkt->data, avpkt->size);

    //parse image header
    if (avpkt->size < 8)
        return AVERROR_INVALIDDATA;
    id = bytestream2_get_le16u(&s->gb);
    if (id == 0x4949)
        le = 1;
    else if (id == 0x4D4D)
        le = 0;
    else {
        av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
        return AVERROR_INVALIDDATA;
    }
    s->le = le;
    // TIFF_BPP is not a required tag and defaults to 1
    s->bppcount = s->bpp = 1;
    s->invert = 0;
    s->compr = TIFF_RAW;
    s->fill_order = 0;
    free_geotags(s);
    /* metadata has been destroyed from lavc internals, that pointer is not
     * valid anymore */
    av_frame_set_metadata(&s->picture, NULL);

    // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
    // that further identifies the file as a TIFF file"
    if (tget_short(&s->gb, le) != 42) {
        av_log(avctx, AV_LOG_ERROR,
               "The answer to life, universe and everything is not correct!\n");
        return AVERROR_INVALIDDATA;
    }
    // Reset these offsets so we can tell if they were set this frame
    s->stripsizesoff = s->strippos = 0;
    /* parse image file directory */
    off = tget_long(&s->gb, le);
    if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {
        av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
        return AVERROR_INVALIDDATA;
    }
    bytestream2_seek(&s->gb, off, SEEK_SET);
    entries = tget_short(&s->gb, le);
    if (bytestream2_get_bytes_left(&s->gb) < entries * 12)
        return AVERROR_INVALIDDATA;
    for (i = 0; i < entries; i++) {
        if ((ret = tiff_decode_tag(s)) < 0)
            return ret;
    }

    for (i = 0; i<s->geotag_count; i++) {
        const char *keyname = get_geokey_name(s->geotags[i].key);
        if (!keyname) {
            av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);
            continue;
        }
        if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {
            av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);
            continue;
        }
        ret = av_dict_set(avpriv_frame_get_metadatap(&s->picture), keyname, s->geotags[i].val, 0);
        if (ret<0) {
            av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);
            return ret;
        }
    }

    if (!s->strippos && !s->stripoff) {
        av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
        return AVERROR_INVALIDDATA;
    }
    /* now we have the data and may start decoding */
    if ((ret = init_image(s)) < 0)
        return ret;

    if (s->strips == 1 && !s->stripsize) {
        av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
        s->stripsize = avpkt->size - s->stripoff;
    }
    stride = p->linesize[0];
    dst = p->data[0];

    if (s->stripsizesoff) {
        if (s->stripsizesoff >= (unsigned)avpkt->size)
            return AVERROR_INVALIDDATA;
        bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff, avpkt->size - s->stripsizesoff);
    }
    if (s->strippos) {
        if (s->strippos >= (unsigned)avpkt->size)
            return AVERROR_INVALIDDATA;
        bytestream2_init(&stripdata, avpkt->data + s->strippos, avpkt->size - s->strippos);
    }

    if (s->rps <= 0) {
        av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);
        return AVERROR_INVALIDDATA;
    }

    for (i = 0; i < s->height; i += s->rps) {
        if (s->stripsizesoff)
            ssize = tget(&stripsizes, s->sstype, s->le);
        else
            ssize = s->stripsize;

        if (s->strippos)
            soff = tget(&stripdata, s->sot, s->le);
        else
            soff = s->stripoff;

        if (soff > avpkt->size || ssize > avpkt->size - soff) {
            av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");
            return AVERROR_INVALIDDATA;
        }
        if (tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize,
                              FFMIN(s->rps, s->height - i)) < 0)
            break;
        dst += s->rps * stride;
    }
    if (s->predictor == 2) {
        dst = p->data[0];
        soff = s->bpp >> 3;
        ssize = s->width * soff;
        if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||
            s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE) {
            for (i = 0; i < s->height; i++) {
                for (j = soff; j < ssize; j += 2)
                    AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));
                dst += stride;
            }
        } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||
                   s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {
            for (i = 0; i < s->height; i++) {
                for (j = soff; j < ssize; j += 2)
                    AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));
                dst += stride;
            }
        } else {
            for (i = 0; i < s->height; i++) {
                for (j = soff; j < ssize; j++)
                    dst[j] += dst[j - soff];
                dst += stride;
            }
        }
    }

    if (s->invert) {
        dst = s->picture.data[0];
        for (i = 0; i < s->height; i++) {
            for (j = 0; j < s->picture.linesize[0]; j++)
                dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];
            dst += s->picture.linesize[0];
        }
    }
    *picture   = s->picture;
    *got_frame = 1;

    return avpkt->size;
}

static av_cold int tiff_init(AVCodecContext *avctx)
{
    TiffContext *s = avctx->priv_data;

    s->width = 0;
    s->height = 0;
    s->avctx = avctx;
    avcodec_get_frame_defaults(&s->picture);
    avctx->coded_frame = &s->picture;
    ff_lzw_decode_open(&s->lzw);
    ff_ccitt_unpack_init();

    return 0;
}

static av_cold int tiff_end(AVCodecContext *avctx)
{
    TiffContext *const s = avctx->priv_data;

    free_geotags(s);

    ff_lzw_decode_close(&s->lzw);
    av_freep(&s->deinvert_buf);
    if (s->picture.data[0])
        avctx->release_buffer(avctx, &s->picture);
    return 0;
}

AVCodec ff_tiff_decoder = {
    .name           = "tiff",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_TIFF,
    .priv_data_size = sizeof(TiffContext),
    .init           = tiff_init,
    .close          = tiff_end,
    .decode         = decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),
};