falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
45496 Commits
32 Branches
646MB
Tree: e2bf1082cc
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'e2bf1082cc'
${ noResults }
FFmpeg/libavcodec/tiff.c

1191 lines
37KB
Raw Blame History 

  1. /*

  2.  * Copyright (c) 2006 Konstantin Shishkov

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

  6.  * FFmpeg is free software; you can redistribute it and/or

  7.  * modify it under the terms of the GNU Lesser General Public

  8.  * License as published by the Free Software Foundation; either

  9.  * version 2.1 of the License, or (at your option) any later version.

  10.  *

  11.  * FFmpeg is distributed in the hope that it will be useful,

  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  14.  * Lesser General Public License for more details.

  15.  *

  16.  * You should have received a copy of the GNU Lesser General Public

  17.  * License along with FFmpeg; if not, write to the Free Software

  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  19.  */

  20. 

  21. /**

  22.  * @file

  23.  * TIFF image decoder

  24.  * @author Konstantin Shishkov

  25.  */

  26. 

  27. #include "avcodec.h"

  28. #include "bytestream.h"

  29. #include "config.h"

  30. #if CONFIG_ZLIB

  31. #include <zlib.h>

  32. #endif

  33. #include "lzw.h"

  34. #include "tiff.h"

  35. #include "tiff_data.h"

  36. #include "faxcompr.h"

  37. #include "mathops.h"

  38. #include "libavutil/attributes.h"

  39. #include "libavutil/intreadwrite.h"

  40. #include "libavutil/imgutils.h"

  41. #include "libavutil/avstring.h"

  42. 

  43. typedef struct TiffContext {

  44.     AVCodecContext *avctx;

  45.     AVFrame picture;

  46.     GetByteContext gb;

  47. 

  48.     int width, height;

  49.     unsigned int bpp, bppcount;

  50.     uint32_t palette[256];

  51.     int palette_is_set;

  52.     int le;

  53.     enum TiffCompr compr;

  54.     int invert;

  55.     int fax_opts;

  56.     int predictor;

  57.     int fill_order;

  58. 

  59.     int strips, rps, sstype;

  60.     int sot;

  61.     int stripsizesoff, stripsize, stripoff, strippos;

  62.     LZWState *lzw;

  63. 

  64.     int geotag_count;

  65.     TiffGeoTag *geotags;

  66. } TiffContext;

  67. 

  68. static unsigned tget_short(GetByteContext *gb, int le)

  69. {

  70.     unsigned v = le ? bytestream2_get_le16u(gb) : bytestream2_get_be16u(gb);

  71.     return v;

  72. }

  73. 

  74. static unsigned tget_long(GetByteContext *gb, int le)

  75. {

  76.     unsigned v = le ? bytestream2_get_le32u(gb) : bytestream2_get_be32u(gb);

  77.     return v;

  78. }

  79. 

  80. static double tget_double(GetByteContext *gb, int le)

  81. {

  82.     av_alias64 i = { .u64 = le ? bytestream2_get_le64u(gb) : bytestream2_get_be64u(gb)};

  83.     return i.f64;

  84. }

  85. 

  86. static unsigned tget(GetByteContext *gb, int type, int le)

  87. {

  88.     switch (type) {

  89.     case TIFF_BYTE : return bytestream2_get_byteu(gb);

  90.     case TIFF_SHORT: return tget_short(gb, le);

  91.     case TIFF_LONG : return tget_long(gb, le);

  92.     default        : return UINT_MAX;

  93.     }

  94. }

  95. 

  96. static void free_geotags(TiffContext *const s)

  97. {

  98.     int i;

  99.     for (i = 0; i < s->geotag_count; i++) {

  100.         if (s->geotags[i].val)

  101.             av_freep(&s->geotags[i].val);

  102.     }

  103.     av_freep(&s->geotags);

  104. }

  105. 

  106. #define RET_GEOKEY(TYPE, array, element)\

  107.     if (key >= TIFF_##TYPE##_KEY_ID_OFFSET &&\

  108.         key - TIFF_##TYPE##_KEY_ID_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_name_type_map))\

  109.         return ff_tiff_##array##_name_type_map[key - TIFF_##TYPE##_KEY_ID_OFFSET].element;

  110. 

  111. static const char *get_geokey_name(int key)

  112. {

  113.     RET_GEOKEY(VERT, vert, name);

  114.     RET_GEOKEY(PROJ, proj, name);

  115.     RET_GEOKEY(GEOG, geog, name);

  116.     RET_GEOKEY(CONF, conf, name);

  117. 

  118.     return NULL;

  119. }

  120. 

  121. static int get_geokey_type(int key)

  122. {

  123.     RET_GEOKEY(VERT, vert, type);

  124.     RET_GEOKEY(PROJ, proj, type);

  125.     RET_GEOKEY(GEOG, geog, type);

  126.     RET_GEOKEY(CONF, conf, type);

  127. 

  128.     return AVERROR_INVALIDDATA;

  129. }

  130. 

  131. static int cmp_id_key(const void *id, const void *k)

  132. {

  133.     return *(const int*)id - ((const TiffGeoTagKeyName*)k)->key;

  134. }

  135. 

  136. static const char *search_keyval(const TiffGeoTagKeyName *keys, int n, int id)

  137. {

  138.     return ((TiffGeoTagKeyName*)bsearch(&id, keys, n, sizeof(keys[0]), cmp_id_key))->name;

  139. }

  140. 

  141. static char *get_geokey_val(int key, int val)

  142. {

  143.     char *ap;

  144. 

  145.     if (val == TIFF_GEO_KEY_UNDEFINED)

  146.         return av_strdup("undefined");

  147.     if (val == TIFF_GEO_KEY_USER_DEFINED)

  148.         return av_strdup("User-Defined");

  149. 

  150. #define RET_GEOKEY_VAL(TYPE, array)\

  151.     if (val >= TIFF_##TYPE##_OFFSET &&\

  152.         val - TIFF_##TYPE##_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_codes))\

  153.         return av_strdup(ff_tiff_##array##_codes[val - TIFF_##TYPE##_OFFSET]);

  154. 

  155.     switch (key) {

  156.     case TIFF_GT_MODEL_TYPE_GEOKEY:

  157.         RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);

  158.         break;

  159.     case TIFF_GT_RASTER_TYPE_GEOKEY:

  160.         RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);

  161.         break;

  162.     case TIFF_GEOG_LINEAR_UNITS_GEOKEY:

  163.     case TIFF_PROJ_LINEAR_UNITS_GEOKEY:

  164.     case TIFF_VERTICAL_UNITS_GEOKEY:

  165.         RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);

  166.         break;

  167.     case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:

  168.     case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:

  169.         RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);

  170.         break;

  171.     case TIFF_GEOGRAPHIC_TYPE_GEOKEY:

  172.         RET_GEOKEY_VAL(GCS_TYPE, gcs_type);

  173.         RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);

  174.         break;

  175.     case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:

  176.         RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);

  177.         RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);

  178.         break;

  179.     case TIFF_GEOG_ELLIPSOID_GEOKEY:

  180.         RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);

  181.         break;

  182.     case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:

  183.         RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);

  184.         break;

  185.     case TIFF_PROJECTED_CS_TYPE_GEOKEY:

  186.         return av_strdup(search_keyval(ff_tiff_proj_cs_type_codes, FF_ARRAY_ELEMS(ff_tiff_proj_cs_type_codes), val));

  187.         break;

  188.     case TIFF_PROJECTION_GEOKEY:

  189.         return av_strdup(search_keyval(ff_tiff_projection_codes, FF_ARRAY_ELEMS(ff_tiff_projection_codes), val));

  190.         break;

  191.     case TIFF_PROJ_COORD_TRANS_GEOKEY:

  192.         RET_GEOKEY_VAL(COORD_TRANS, coord_trans);

  193.         break;

  194.     case TIFF_VERTICAL_CS_TYPE_GEOKEY:

  195.         RET_GEOKEY_VAL(VERT_CS, vert_cs);

  196.         RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);

  197.         break;

  198. 

  199.     }

  200. 

  201.     ap = av_malloc(14);

  202.     if (ap)

  203.         snprintf(ap, 14, "Unknown-%d", val);

  204.     return ap;

  205. }

  206. 

  207. static char *doubles2str(double *dp, int count, const char *sep)

  208. {

  209.     int i;

  210.     char *ap, *ap0;

  211.     int component_len = 15 + strlen(sep);

  212.     if (!sep) sep = ", ";

  213.     ap = av_malloc(component_len * count);

  214.     if (!ap)

  215.         return NULL;

  216.     ap0   = ap;

  217.     ap[0] = '\0';

  218.     for (i = 0; i < count; i++) {

  219.         unsigned l = snprintf(ap, component_len, "%f%s", dp[i], sep);

  220.         if(l >= component_len) {

  221.             av_free(ap0);

  222.             return NULL;

  223.         }

  224.         ap += l;

  225.     }

  226.     ap0[strlen(ap0) - strlen(sep)] = '\0';

  227.     return ap0;

  228. }

  229. 

  230. static char *shorts2str(int16_t *sp, int count, const char *sep)

  231. {

  232.     int i;

  233.     char *ap, *ap0;

  234.     if (!sep) sep = ", ";

  235.     ap = av_malloc((5 + strlen(sep)) * count);

  236.     if (!ap)

  237.         return NULL;

  238.     ap0   = ap;

  239.     ap[0] = '\0';

  240.     for (i = 0; i < count; i++) {

  241.         int l = snprintf(ap, 5 + strlen(sep), "%d%s", sp[i], sep);

  242.         ap += l;

  243.     }

  244.     ap0[strlen(ap0) - strlen(sep)] = '\0';

  245.     return ap0;

  246. }

  247. 

  248. static int add_doubles_metadata(int count,

  249.                                 const char *name, const char *sep,

  250.                                 TiffContext *s)

  251. {

  252.     char *ap;

  253.     int i;

  254.     double *dp;

  255. 

  256.     if (count >= INT_MAX / sizeof(int64_t))

  257.         return AVERROR_INVALIDDATA;

  258.     if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))

  259.         return AVERROR_INVALIDDATA;

  260. 

  261.     dp = av_malloc(count * sizeof(double));

  262.     if (!dp)

  263.         return AVERROR(ENOMEM);

  264. 

  265.     for (i = 0; i < count; i++)

  266.         dp[i] = tget_double(&s->gb, s->le);

  267.     ap = doubles2str(dp, count, sep);

  268.     av_freep(&dp);

  269.     if (!ap)

  270.         return AVERROR(ENOMEM);

  271.     av_dict_set(&s->picture.metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);

  272.     return 0;

  273. }

  274. 

  275. static int add_shorts_metadata(int count, const char *name,

  276.                                const char *sep, TiffContext *s)

  277. {

  278.     char *ap;

  279.     int i;

  280.     int16_t *sp;

  281. 

  282.     if (count >= INT_MAX / sizeof(int16_t))

  283.         return AVERROR_INVALIDDATA;

  284.     if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int16_t))

  285.         return AVERROR_INVALIDDATA;

  286. 

  287.     sp = av_malloc(count * sizeof(int16_t));

  288.     if (!sp)

  289.         return AVERROR(ENOMEM);

  290. 

  291.     for (i = 0; i < count; i++)

  292.         sp[i] = tget_short(&s->gb, s->le);

  293.     ap = shorts2str(sp, count, sep);

  294.     av_freep(&sp);

  295.     if (!ap)

  296.         return AVERROR(ENOMEM);

  297.     av_dict_set(&s->picture.metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);

  298.     return 0;

  299. }

  300. 

  301. static int add_string_metadata(int count, const char *name,

  302.                                TiffContext *s)

  303. {

  304.     char *value;

  305. 

  306.     if (bytestream2_get_bytes_left(&s->gb) < count)

  307.         return AVERROR_INVALIDDATA;

  308. 

  309.     value = av_malloc(count + 1);

  310.     if (!value)

  311.         return AVERROR(ENOMEM);

  312. 

  313.     bytestream2_get_bufferu(&s->gb, value, count);

  314.     value[count] = 0;

  315. 

  316.     av_dict_set(&s->picture.metadata, name, value, AV_DICT_DONT_STRDUP_VAL);

  317.     return 0;

  318. }

  319. 

  320. static int add_metadata(int count, int type,

  321.                         const char *name, const char *sep, TiffContext *s)

  322. {

  323.     switch(type) {

  324.     case TIFF_DOUBLE: return add_doubles_metadata(count, name, sep, s);

  325.     case TIFF_SHORT : return add_shorts_metadata(count, name, sep, s);

  326.     case TIFF_STRING: return add_string_metadata(count, name, s);

  327.     default         : return AVERROR_INVALIDDATA;

  328.     };

  329. }

  330. 

  331. #if CONFIG_ZLIB

  332. static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src,

  333.                            int size)

  334. {

  335.     z_stream zstream = { 0 };

  336.     int zret;

  337. 

  338.     zstream.next_in = (uint8_t *)src;

  339.     zstream.avail_in = size;

  340.     zstream.next_out = dst;

  341.     zstream.avail_out = *len;

  342.     zret = inflateInit(&zstream);

  343.     if (zret != Z_OK) {

  344.         av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);

  345.         return zret;

  346.     }

  347.     zret = inflate(&zstream, Z_SYNC_FLUSH);

  348.     inflateEnd(&zstream);

  349.     *len = zstream.total_out;

  350.     return zret == Z_STREAM_END ? Z_OK : zret;

  351. }

  352. #endif

  353. 

  354. static void av_always_inline horizontal_fill(unsigned int bpp, uint8_t* dst,

  355.                                              int usePtr, const uint8_t *src,

  356.                                              uint8_t c, int width, int offset)

  357. {

  358.     switch (bpp) {

  359.     case 1:

  360.         while (--width >= 0) {

  361.             dst[(width+offset)*8+7] = (usePtr ? src[width] : c)      & 0x1;

  362.             dst[(width+offset)*8+6] = (usePtr ? src[width] : c) >> 1 & 0x1;

  363.             dst[(width+offset)*8+5] = (usePtr ? src[width] : c) >> 2 & 0x1;

  364.             dst[(width+offset)*8+4] = (usePtr ? src[width] : c) >> 3 & 0x1;

  365.             dst[(width+offset)*8+3] = (usePtr ? src[width] : c) >> 4 & 0x1;

  366.             dst[(width+offset)*8+2] = (usePtr ? src[width] : c) >> 5 & 0x1;

  367.             dst[(width+offset)*8+1] = (usePtr ? src[width] : c) >> 6 & 0x1;

  368.             dst[(width+offset)*8+0] = (usePtr ? src[width] : c) >> 7;

  369.         }

  370.         break;

  371.     case 2:

  372.         while (--width >= 0) {

  373.             dst[(width+offset)*4+3] = (usePtr ? src[width] : c) & 0x3;

  374.             dst[(width+offset)*4+2] = (usePtr ? src[width] : c) >> 2 & 0x3;

  375.             dst[(width+offset)*4+1] = (usePtr ? src[width] : c) >> 4 & 0x3;

  376.             dst[(width+offset)*4+0] = (usePtr ? src[width] : c) >> 6;

  377.         }

  378.         break;

  379.     case 4:

  380.         while (--width >= 0) {

  381.             dst[(width+offset)*2+1] = (usePtr ? src[width] : c) & 0xF;

  382.             dst[(width+offset)*2+0] = (usePtr ? src[width] : c) >> 4;

  383.         }

  384.         break;

  385.     default:

  386.         if (usePtr) {

  387.             memcpy(dst + offset, src, width);

  388.         } else {

  389.             memset(dst + offset, c, width);

  390.         }

  391.     }

  392. }

  393. 

  394. static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,

  395.                              const uint8_t *src, int size, int lines)

  396. {

  397.     int c, line, pixels, code;

  398.     const uint8_t *ssrc = src;

  399.     int width = ((s->width * s->bpp) + 7) >> 3;

  400. 

  401.     if (size <= 0)

  402.         return AVERROR_INVALIDDATA;

  403. 

  404. #if CONFIG_ZLIB

  405.     if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {

  406.         uint8_t *zbuf;

  407.         unsigned long outlen;

  408.         int ret;

  409.         outlen = width * lines;

  410.         zbuf = av_malloc(outlen);

  411.         if (!zbuf)

  412.             return AVERROR(ENOMEM);

  413.         ret = tiff_uncompress(zbuf, &outlen, src, size);

  414.         if (ret != Z_OK) {

  415.             av_log(s->avctx, AV_LOG_ERROR,

  416.                    "Uncompressing failed (%lu of %lu) with error %d\n", outlen,

  417.                    (unsigned long)width * lines, ret);

  418.             av_free(zbuf);

  419.             return -1;

  420.         }

  421.         src = zbuf;

  422.         for (line = 0; line < lines; line++) {

  423.             if(s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8){

  424.                 horizontal_fill(s->bpp, dst, 1, src, 0, width, 0);

  425.             }else{

  426.                 memcpy(dst, src, width);

  427.             }

  428.             dst += stride;

  429.             src += width;

  430.         }

  431.         av_free(zbuf);

  432.         return 0;

  433.     }

  434. #endif

  435.     if (s->compr == TIFF_LZW) {

  436.         if (ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0) {

  437.             av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");

  438.             return -1;

  439.         }

  440.     }

  441.     if (s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3

  442.         || s->compr == TIFF_G4) {

  443.         int i, ret = 0;

  444.         uint8_t *src2 = av_malloc((unsigned)size +

  445.                                   FF_INPUT_BUFFER_PADDING_SIZE);

  446. 

  447.         if (!src2) {

  448.             av_log(s->avctx, AV_LOG_ERROR,

  449.                    "Error allocating temporary buffer\n");

  450.             return AVERROR(ENOMEM);

  451.         }

  452.         if (s->fax_opts & 2) {

  453.             av_log(s->avctx, AV_LOG_ERROR,

  454.                    "Uncompressed fax mode is not supported (yet)\n");

  455.             av_free(src2);

  456.             return -1;

  457.         }

  458.         if (!s->fill_order) {

  459.             memcpy(src2, src, size);

  460.         } else {

  461.             for (i = 0; i < size; i++)

  462.                 src2[i] = ff_reverse[src[i]];

  463.         }

  464.         memset(src2 + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);

  465.         switch (s->compr) {

  466.         case TIFF_CCITT_RLE:

  467.         case TIFF_G3:

  468.         case TIFF_G4:

  469.             ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride,

  470.                                   s->compr, s->fax_opts);

  471.             break;

  472.         }

  473.         if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8)

  474.             for (line = 0; line < lines; line++) {

  475.                 horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);

  476.                 dst += stride;

  477.             }

  478.         av_free(src2);

  479.         return ret;

  480.     }

  481.     for (line = 0; line < lines; line++) {

  482.         if (src - ssrc > size) {

  483.             av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");

  484.             return -1;

  485.         }

  486.         switch (s->compr) {

  487.         case TIFF_RAW:

  488.             if (ssrc + size - src < width)

  489.                 return AVERROR_INVALIDDATA;

  490.             if (!s->fill_order) {

  491.                 horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),

  492.                                 dst, 1, src, 0, width, 0);

  493.             } else {

  494.                 int i;

  495.                 for (i = 0; i < width; i++)

  496.                     dst[i] = ff_reverse[src[i]];

  497.             }

  498.             src += width;

  499.             break;

  500.         case TIFF_PACKBITS:

  501.             for (pixels = 0; pixels < width;) {

  502.                 if (ssrc + size - src < 2) {

  503.                     av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");

  504.                     return AVERROR_INVALIDDATA;

  505.                 }

  506.                 code = (int8_t) * src++;

  507.                 if (code >= 0) {

  508.                     code++;

  509.                     if (pixels + code > width) {

  510.                         av_log(s->avctx, AV_LOG_ERROR,

  511.                                "Copy went out of bounds\n");

  512.                         return -1;

  513.                     }

  514.                     if (ssrc + size - src < code) {

  515.                         av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");

  516.                         return AVERROR_INVALIDDATA;

  517.                     }

  518.                     horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),

  519.                                     dst, 1, src, 0, code, pixels);

  520.                     src += code;

  521.                     pixels += code;

  522.                 } else if (code != -128) { // -127..-1

  523.                     code = (-code) + 1;

  524.                     if (pixels + code > width) {

  525.                         av_log(s->avctx, AV_LOG_ERROR,

  526.                                "Run went out of bounds\n");

  527.                         return -1;

  528.                     }

  529.                     c = *src++;

  530.                     horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),

  531.                                     dst, 0, NULL, c, code, pixels);

  532.                     pixels += code;

  533.                 }

  534.             }

  535.             break;

  536.         case TIFF_LZW:

  537.             pixels = ff_lzw_decode(s->lzw, dst, width);

  538.             if (pixels < width) {

  539.                 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n",

  540.                        pixels, width);

  541.                 return -1;

  542.             }

  543.             if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8)

  544.                 horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);

  545.             break;

  546.         }

  547.         dst += stride;

  548.     }

  549.     return 0;

  550. }

  551. 

  552. static int init_image(TiffContext *s)

  553. {

  554.     int i, ret;

  555.     uint32_t *pal;

  556. 

  557.     switch (s->bpp * 10 + s->bppcount) {

  558.     case 11:

  559.         if (!s->palette_is_set) {

  560.             s->avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;

  561.             break;

  562.         }

  563.     case 21:

  564.     case 41:

  565.     case 81:

  566.         s->avctx->pix_fmt = AV_PIX_FMT_PAL8;

  567.         break;

  568.     case 243:

  569.         s->avctx->pix_fmt = AV_PIX_FMT_RGB24;

  570.         break;

  571.     case 161:

  572.         s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GRAY16LE : AV_PIX_FMT_GRAY16BE;

  573.         break;

  574.     case 162:

  575.         s->avctx->pix_fmt = AV_PIX_FMT_GRAY8A;

  576.         break;

  577.     case 324:

  578.         s->avctx->pix_fmt = AV_PIX_FMT_RGBA;

  579.         break;

  580.     case 483:

  581.         s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGB48LE : AV_PIX_FMT_RGB48BE;

  582.         break;

  583.     case 644:

  584.         s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGBA64LE : AV_PIX_FMT_RGBA64BE;

  585.         break;

  586.     default:

  587.         av_log(s->avctx, AV_LOG_ERROR,

  588.                "This format is not supported (bpp=%d, bppcount=%d)\n",

  589.                s->bpp, s->bppcount);

  590.         return AVERROR_INVALIDDATA;

  591.     }

  592.     if (s->width != s->avctx->width || s->height != s->avctx->height) {

  593.         if ((ret = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)

  594.             return ret;

  595.         avcodec_set_dimensions(s->avctx, s->width, s->height);

  596.     }

  597.     if (s->picture.data[0])

  598.         s->avctx->release_buffer(s->avctx, &s->picture);

  599.     if ((ret = s->avctx->get_buffer(s->avctx, &s->picture)) < 0) {

  600.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  601.         return ret;

  602.     }

  603.     if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8) {

  604.         if (s->palette_is_set) {

  605.             memcpy(s->picture.data[1], s->palette, sizeof(s->palette));

  606.         } else {

  607.             /* make default grayscale pal */

  608.             pal = (uint32_t *) s->picture.data[1];

  609.             for (i = 0; i < 1<<s->bpp; i++)

  610.                 pal[i] = 0xFFU << 24 | i * 255 / ((1<<s->bpp) - 1) * 0x010101;

  611.         }

  612.     }

  613.     return 0;

  614. }

  615. 

  616. static int tiff_decode_tag(TiffContext *s)

  617. {

  618.     unsigned tag, type, count, off, value = 0;

  619.     int i, j, k, pos, start;

  620.     int ret;

  621.     uint32_t *pal;

  622.     double *dp;

  623. 

  624.     tag   = tget_short(&s->gb, s->le);

  625.     type  = tget_short(&s->gb, s->le);

  626.     count = tget_long(&s->gb, s->le);

  627.     off   = tget_long(&s->gb, s->le);

  628.     start = bytestream2_tell(&s->gb);

  629. 

  630.     if (type == 0 || type >= FF_ARRAY_ELEMS(type_sizes)) {

  631.         av_log(s->avctx, AV_LOG_DEBUG, "Unknown tiff type (%u) encountered\n",

  632.                type);

  633.         return 0;

  634.     }

  635. 

  636.     if (count == 1) {

  637.         switch (type) {

  638.         case TIFF_BYTE:

  639.         case TIFF_SHORT:

  640.             bytestream2_seek(&s->gb, -4, SEEK_CUR);

  641.             value = tget(&s->gb, type, s->le);

  642.             break;

  643.         case TIFF_LONG:

  644.             value = off;

  645.             break;

  646.         case TIFF_STRING:

  647.             if (count <= 4) {

  648.                 bytestream2_seek(&s->gb, -4, SEEK_CUR);

  649.                 break;

  650.             }

  651.         default:

  652.             value = UINT_MAX;

  653.             bytestream2_seek(&s->gb, off, SEEK_SET);

  654.         }

  655.     } else {

  656.         if (count <= 4 && type_sizes[type] * count <= 4) {

  657.             bytestream2_seek(&s->gb, -4, SEEK_CUR);

  658.         } else {

  659.             bytestream2_seek(&s->gb, off, SEEK_SET);

  660.         }

  661.     }

  662. 

  663.     switch (tag) {

  664.     case TIFF_WIDTH:

  665.         s->width = value;

  666.         break;

  667.     case TIFF_HEIGHT:

  668.         s->height = value;

  669.         break;

  670.     case TIFF_BPP:

  671.         s->bppcount = count;

  672.         if (count > 4) {

  673.             av_log(s->avctx, AV_LOG_ERROR,

  674.                    "This format is not supported (bpp=%d, %d components)\n",

  675.                    s->bpp, count);

  676.             return -1;

  677.         }

  678.         if (count == 1)

  679.             s->bpp = value;

  680.         else {

  681.             switch (type) {

  682.             case TIFF_BYTE:

  683.                 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) +

  684.                          ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);

  685.                 break;

  686.             case TIFF_SHORT:

  687.             case TIFF_LONG:

  688.                 s->bpp = 0;

  689.                 if (bytestream2_get_bytes_left(&s->gb) < type_sizes[type] * count)

  690.                     return -1;

  691.                 for (i = 0; i < count; i++)

  692.                     s->bpp += tget(&s->gb, type, s->le);

  693.                 break;

  694.             default:

  695.                 s->bpp = -1;

  696.             }

  697.         }

  698.         break;

  699.     case TIFF_SAMPLES_PER_PIXEL:

  700.         if (count != 1) {

  701.             av_log(s->avctx, AV_LOG_ERROR,

  702.                    "Samples per pixel requires a single value, many provided\n");

  703.             return AVERROR_INVALIDDATA;

  704.         }

  705.         if (s->bppcount == 1)

  706.             s->bpp *= value;

  707.         s->bppcount = value;

  708.         break;

  709.     case TIFF_COMPR:

  710.         s->compr = value;

  711.         s->predictor = 0;

  712.         switch (s->compr) {

  713.         case TIFF_RAW:

  714.         case TIFF_PACKBITS:

  715.         case TIFF_LZW:

  716.         case TIFF_CCITT_RLE:

  717.             break;

  718.         case TIFF_G3:

  719.         case TIFF_G4:

  720.             s->fax_opts = 0;

  721.             break;

  722.         case TIFF_DEFLATE:

  723.         case TIFF_ADOBE_DEFLATE:

  724. #if CONFIG_ZLIB

  725.             break;

  726. #else

  727.             av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");

  728.             return -1;

  729. #endif

  730.         case TIFF_JPEG:

  731.         case TIFF_NEWJPEG:

  732.             av_log(s->avctx, AV_LOG_ERROR,

  733.                    "JPEG compression is not supported\n");

  734.             return -1;

  735.         default:

  736.             av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n",

  737.                    s->compr);

  738.             return -1;

  739.         }

  740.         break;

  741.     case TIFF_ROWSPERSTRIP:

  742.         if (type == TIFF_LONG && value == UINT_MAX)

  743.             value = s->avctx->height;

  744.         if (value < 1) {

  745.             av_log(s->avctx, AV_LOG_ERROR,

  746.                    "Incorrect value of rows per strip\n");

  747.             return -1;

  748.         }

  749.         s->rps = value;

  750.         break;

  751.     case TIFF_STRIP_OFFS:

  752.         if (count == 1) {

  753.             s->strippos = 0;

  754.             s->stripoff = value;

  755.         } else

  756.             s->strippos = off;

  757.         s->strips = count;

  758.         if (s->strips == 1)

  759.             s->rps = s->height;

  760.         s->sot = type;

  761.         if (s->strippos > bytestream2_size(&s->gb)) {

  762.             av_log(s->avctx, AV_LOG_ERROR,

  763.                    "Tag referencing position outside the image\n");

  764.             return -1;

  765.         }

  766.         break;

  767.     case TIFF_STRIP_SIZE:

  768.         if (count == 1) {

  769.             s->stripsizesoff = 0;

  770.             s->stripsize = value;

  771.             s->strips = 1;

  772.         } else {

  773.             s->stripsizesoff = off;

  774.         }

  775.         s->strips = count;

  776.         s->sstype = type;

  777.         if (s->stripsizesoff > bytestream2_size(&s->gb)) {

  778.             av_log(s->avctx, AV_LOG_ERROR,

  779.                    "Tag referencing position outside the image\n");

  780.             return -1;

  781.         }

  782.         break;

  783.     case TIFF_TILE_BYTE_COUNTS:

  784.     case TIFF_TILE_LENGTH:

  785.     case TIFF_TILE_OFFSETS:

  786.     case TIFF_TILE_WIDTH:

  787.         av_log(s->avctx, AV_LOG_ERROR, "Tiled images are not supported\n");

  788.         return AVERROR_PATCHWELCOME;

  789.         break;

  790.     case TIFF_PREDICTOR:

  791.         s->predictor = value;

  792.         break;

  793.     case TIFF_INVERT:

  794.         switch (value) {

  795.         case 0:

  796.             s->invert = 1;

  797.             break;

  798.         case 1:

  799.             s->invert = 0;

  800.             break;

  801.         case 2:

  802.         case 3:

  803.             break;

  804.         default:

  805.             av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n",

  806.                    value);

  807.             return -1;

  808.         }

  809.         break;

  810.     case TIFF_FILL_ORDER:

  811.         if (value < 1 || value > 2) {

  812.             av_log(s->avctx, AV_LOG_ERROR,

  813.                    "Unknown FillOrder value %d, trying default one\n", value);

  814.             value = 1;

  815.         }

  816.         s->fill_order = value - 1;

  817.         break;

  818.     case TIFF_PAL:

  819.         pal = (uint32_t *) s->palette;

  820.         off = type_sizes[type];

  821.         if (count / 3 > 256 || bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)

  822.             return -1;

  823.         off = (type_sizes[type] - 1) << 3;

  824.         for (k = 2; k >= 0; k--) {

  825.             for (i = 0; i < count / 3; i++) {

  826.                 if (k == 2)

  827.                     pal[i] = 0xFFU << 24;

  828.                 j =  (tget(&s->gb, type, s->le) >> off) << (k * 8);

  829.                 pal[i] |= j;

  830.             }

  831.         }

  832.         s->palette_is_set = 1;

  833.         break;

  834.     case TIFF_PLANAR:

  835.         if (value == 2) {

  836.             av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");

  837.             return -1;

  838.         }

  839.         break;

  840.     case TIFF_T4OPTIONS:

  841.         if (s->compr == TIFF_G3)

  842.             s->fax_opts = value;

  843.         break;

  844.     case TIFF_T6OPTIONS:

  845.         if (s->compr == TIFF_G4)

  846.             s->fax_opts = value;

  847.         break;

  848. #define ADD_METADATA(count, name, sep)\

  849.     if (ret = add_metadata(count, type, name, sep, s) < 0) {\

  850.         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\

  851.         return ret;\

  852.     }

  853.     case TIFF_MODEL_PIXEL_SCALE:

  854.         ADD_METADATA(count, "ModelPixelScaleTag", NULL);

  855.         break;

  856.     case TIFF_MODEL_TRANSFORMATION:

  857.         ADD_METADATA(count, "ModelTransformationTag", NULL);

  858.         break;

  859.     case TIFF_MODEL_TIEPOINT:

  860.         ADD_METADATA(count, "ModelTiepointTag", NULL);

  861.         break;

  862.     case TIFF_GEO_KEY_DIRECTORY:

  863.         ADD_METADATA(1, "GeoTIFF_Version", NULL);

  864.         ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");

  865.         s->geotag_count   = tget_short(&s->gb, s->le);

  866.         if (s->geotag_count > count / 4 - 1) {

  867.             s->geotag_count = count / 4 - 1;

  868.             av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n");

  869.         }

  870.         if (bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4)

  871.             return -1;

  872.         s->geotags = av_mallocz(sizeof(TiffGeoTag) * s->geotag_count);

  873.         if (!s->geotags) {

  874.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  875.             return AVERROR(ENOMEM);

  876.         }

  877.         for (i = 0; i < s->geotag_count; i++) {

  878.             s->geotags[i].key    = tget_short(&s->gb, s->le);

  879.             s->geotags[i].type   = tget_short(&s->gb, s->le);

  880.             s->geotags[i].count  = tget_short(&s->gb, s->le);

  881. 

  882.             if (!s->geotags[i].type)

  883.                 s->geotags[i].val  = get_geokey_val(s->geotags[i].key, tget_short(&s->gb, s->le));

  884.             else

  885.                 s->geotags[i].offset = tget_short(&s->gb, s->le);

  886.         }

  887.         break;

  888.     case TIFF_GEO_DOUBLE_PARAMS:

  889.         if (count >= INT_MAX / sizeof(int64_t))

  890.             return AVERROR_INVALIDDATA;

  891.         if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))

  892.             return AVERROR_INVALIDDATA;

  893.         dp = av_malloc(count * sizeof(double));

  894.         if (!dp) {

  895.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  896.             return AVERROR(ENOMEM);

  897.         }

  898.         for (i = 0; i < count; i++)

  899.             dp[i] = tget_double(&s->gb, s->le);

  900.         for (i = 0; i < s->geotag_count; i++) {

  901.             if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) {

  902.                 if (s->geotags[i].count == 0

  903.                     || s->geotags[i].offset + s->geotags[i].count > count) {

  904.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  905.                 } else {

  906.                     char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");

  907.                     if (!ap) {

  908.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  909.                         av_freep(&dp);

  910.                         return AVERROR(ENOMEM);

  911.                     }

  912.                     s->geotags[i].val = ap;

  913.                 }

  914.             }

  915.         }

  916.         av_freep(&dp);

  917.         break;

  918.     case TIFF_GEO_ASCII_PARAMS:

  919.         pos = bytestream2_tell(&s->gb);

  920.         for (i = 0; i < s->geotag_count; i++) {

  921.             if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) {

  922.                 if (s->geotags[i].count == 0

  923.                     || s->geotags[i].offset +  s->geotags[i].count > count) {

  924.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  925.                 } else {

  926.                     char *ap;

  927. 

  928.                     bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);

  929.                     if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)

  930.                         return -1;

  931.                     ap = av_malloc(s->geotags[i].count);

  932.                     if (!ap) {

  933.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  934.                         return AVERROR(ENOMEM);

  935.                     }

  936.                     bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);

  937.                     ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte

  938.                     s->geotags[i].val = ap;

  939.                 }

  940.             }

  941.         }

  942.         break;

  943.     case TIFF_ARTIST:

  944.         ADD_METADATA(count, "artist", NULL);

  945.         break;

  946.     case TIFF_COPYRIGHT:

  947.         ADD_METADATA(count, "copyright", NULL);

  948.         break;

  949.     case TIFF_DATE:

  950.         ADD_METADATA(count, "date", NULL);

  951.         break;

  952.     case TIFF_DOCUMENT_NAME:

  953.         ADD_METADATA(count, "document_name", NULL);

  954.         break;

  955.     case TIFF_HOST_COMPUTER:

  956.         ADD_METADATA(count, "computer", NULL);

  957.         break;

  958.     case TIFF_IMAGE_DESCRIPTION:

  959.         ADD_METADATA(count, "description", NULL);

  960.         break;

  961.     case TIFF_MAKE:

  962.         ADD_METADATA(count, "make", NULL);

  963.         break;

  964.     case TIFF_MODEL:

  965.         ADD_METADATA(count, "model", NULL);

  966.         break;

  967.     case TIFF_PAGE_NAME:

  968.         ADD_METADATA(count, "page_name", NULL);

  969.         break;

  970.     case TIFF_PAGE_NUMBER:

  971.         ADD_METADATA(count, "page_number", " / ");

  972.         break;

  973.     case TIFF_SOFTWARE_NAME:

  974.         ADD_METADATA(count, "software", NULL);

  975.         break;

  976.     default:

  977.         av_log(s->avctx, AV_LOG_DEBUG, "Unknown or unsupported tag %d/0X%0X\n",

  978.                tag, tag);

  979.     }

  980.     bytestream2_seek(&s->gb, start, SEEK_SET);

  981.     return 0;

  982. }

  983. 

  984. static int decode_frame(AVCodecContext *avctx,

  985.                         void *data, int *data_size, AVPacket *avpkt)

  986. {

  987.     TiffContext *const s = avctx->priv_data;

  988.     AVFrame *picture = data;

  989.     AVFrame *const p = &s->picture;

  990.     unsigned off;

  991.     int id, le, ret;

  992.     int i, j, entries;

  993.     int stride;

  994.     unsigned soff, ssize;

  995.     uint8_t *dst;

  996.     GetByteContext stripsizes;

  997.     GetByteContext stripdata;

  998. 

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

  1000. 

  1001.     //parse image header

  1002.     if (avpkt->size < 8)

  1003.         return AVERROR_INVALIDDATA;

  1004.     id = bytestream2_get_le16u(&s->gb);

  1005.     if (id == 0x4949)

  1006.         le = 1;

  1007.     else if (id == 0x4D4D)

  1008.         le = 0;

  1009.     else {

  1010.         av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");

  1011.         return -1;

  1012.     }

  1013.     s->le = le;

  1014.     // TIFF_BPP is not a required tag and defaults to 1

  1015.     s->bppcount = s->bpp = 1;

  1016.     s->invert = 0;

  1017.     s->compr = TIFF_RAW;

  1018.     s->fill_order = 0;

  1019.     free_geotags(s);

  1020.     /* free existing metadata */

  1021.     av_dict_free(&s->picture.metadata);

  1022. 

  1023.     // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number

  1024.     // that further identifies the file as a TIFF file"

  1025.     if (tget_short(&s->gb, le) != 42) {

  1026.         av_log(avctx, AV_LOG_ERROR,

  1027.                "The answer to life, universe and everything is not correct!\n");

  1028.         return -1;

  1029.     }

  1030.     // Reset these offsets so we can tell if they were set this frame

  1031.     s->stripsizesoff = s->strippos = 0;

  1032.     /* parse image file directory */

  1033.     off = tget_long(&s->gb, le);

  1034.     if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {

  1035.         av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");

  1036.         return AVERROR_INVALIDDATA;

  1037.     }

  1038.     bytestream2_seek(&s->gb, off, SEEK_SET);

  1039.     entries = tget_short(&s->gb, le);

  1040.     if (bytestream2_get_bytes_left(&s->gb) < entries * 12)

  1041.         return AVERROR_INVALIDDATA;

  1042.     for (i = 0; i < entries; i++) {

  1043.         if (tiff_decode_tag(s) < 0)

  1044.             return -1;

  1045.     }

  1046. 

  1047.     for (i = 0; i<s->geotag_count; i++) {

  1048.         const char *keyname = get_geokey_name(s->geotags[i].key);

  1049.         if (!keyname) {

  1050.             av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);

  1051.             continue;

  1052.         }

  1053.         if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {

  1054.             av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);

  1055.             continue;

  1056.         }

  1057.         ret = av_dict_set(&s->picture.metadata, keyname, s->geotags[i].val, 0);

  1058.         if (ret<0) {

  1059.             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);

  1060.             return ret;

  1061.         }

  1062.     }

  1063. 

  1064.     if (!s->strippos && !s->stripoff) {

  1065.         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");

  1066.         return -1;

  1067.     }

  1068.     /* now we have the data and may start decoding */

  1069.     if ((ret = init_image(s)) < 0)

  1070.         return ret;

  1071. 

  1072.     if (s->strips == 1 && !s->stripsize) {

  1073.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1074.         s->stripsize = avpkt->size - s->stripoff;

  1075.     }

  1076.     stride = p->linesize[0];

  1077.     dst = p->data[0];

  1078. 

  1079.     if (s->stripsizesoff) {

  1080.         if (s->stripsizesoff >= avpkt->size)

  1081.             return AVERROR_INVALIDDATA;

  1082.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff, avpkt->size - s->stripsizesoff);

  1083.     }

  1084.     if (s->strippos) {

  1085.         if (s->strippos >= avpkt->size)

  1086.             return AVERROR_INVALIDDATA;

  1087.         bytestream2_init(&stripdata, avpkt->data + s->strippos, avpkt->size - s->strippos);

  1088.     }

  1089. 

  1090.     for (i = 0; i < s->height; i += s->rps) {

  1091.         if (s->stripsizesoff)

  1092.             ssize = tget(&stripsizes, s->sstype, s->le);

  1093.         else

  1094.             ssize = s->stripsize;

  1095. 

  1096.         if (s->strippos)

  1097.             soff = tget(&stripdata, s->sot, s->le);

  1098.         else

  1099.             soff = s->stripoff;

  1100. 

  1101.         if (soff > avpkt->size || ssize > avpkt->size - soff) {

  1102.             av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1103.             return -1;

  1104.         }

  1105.         if (tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize,

  1106.                               FFMIN(s->rps, s->height - i)) < 0)

  1107.             break;

  1108.         dst += s->rps * stride;

  1109.     }

  1110.     if (s->predictor == 2) {

  1111.         dst = p->data[0];

  1112.         soff = s->bpp >> 3;

  1113.         ssize = s->width * soff;

  1114.         if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1115.             s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE) {

  1116.             for (i = 0; i < s->height; i++) {

  1117.                 for (j = soff; j < ssize; j += 2)

  1118.                     AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1119.                 dst += stride;

  1120.             }

  1121.         } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1122.                    s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {

  1123.             for (i = 0; i < s->height; i++) {

  1124.                 for (j = soff; j < ssize; j += 2)

  1125.                     AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1126.                 dst += stride;

  1127.             }

  1128.         } else {

  1129.             for (i = 0; i < s->height; i++) {

  1130.                 for (j = soff; j < ssize; j++)

  1131.                     dst[j] += dst[j - soff];

  1132.                 dst += stride;

  1133.             }

  1134.         }

  1135.     }

  1136. 

  1137.     if (s->invert) {

  1138.         dst = s->picture.data[0];

  1139.         for (i = 0; i < s->height; i++) {

  1140.             for (j = 0; j < s->picture.linesize[0]; j++)

  1141.                 dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];

  1142.             dst += s->picture.linesize[0];

  1143.         }

  1144.     }

  1145.     *picture   = s->picture;

  1146.     *data_size = sizeof(AVPicture);

  1147. 

  1148.     return avpkt->size;

  1149. }

  1150. 

  1151. static av_cold int tiff_init(AVCodecContext *avctx)

  1152. {

  1153.     TiffContext *s = avctx->priv_data;

  1154. 

  1155.     s->width = 0;

  1156.     s->height = 0;

  1157.     s->avctx = avctx;

  1158.     avcodec_get_frame_defaults(&s->picture);

  1159.     avctx->coded_frame = &s->picture;

  1160.     ff_lzw_decode_open(&s->lzw);

  1161.     ff_ccitt_unpack_init();

  1162. 

  1163.     return 0;

  1164. }

  1165. 

  1166. static av_cold int tiff_end(AVCodecContext *avctx)

  1167. {

  1168.     TiffContext *const s = avctx->priv_data;

  1169. 

  1170.     free_geotags(s);

  1171.     if (avctx->coded_frame && avctx->coded_frame->metadata)

  1172.         av_dict_free(&avctx->coded_frame->metadata);

  1173. 

  1174.     ff_lzw_decode_close(&s->lzw);

  1175.     if (s->picture.data[0])

  1176.         avctx->release_buffer(avctx, &s->picture);

  1177.     return 0;

  1178. }

  1179. 

  1180. AVCodec ff_tiff_decoder = {

  1181.     .name           = "tiff",

  1182.     .type           = AVMEDIA_TYPE_VIDEO,

  1183.     .id             = AV_CODEC_ID_TIFF,

  1184.     .priv_data_size = sizeof(TiffContext),

  1185.     .init           = tiff_init,

  1186.     .close          = tiff_end,

  1187.     .decode         = decode_frame,

  1188.     .capabilities   = CODEC_CAP_DR1,

  1189.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1190. };