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FFmpeg/libavcodec/tiff.c

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  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 "internal.h"

  38. #include "mathops.h"

  39. #include "libavutil/attributes.h"

  40. #include "libavutil/intreadwrite.h"

  41. #include "libavutil/imgutils.h"

  42. #include "libavutil/avstring.h"

  43. 

  44. typedef struct TiffContext {

  45.     AVCodecContext *avctx;

  46.     GetByteContext gb;

  47.     AVFrame picture;

  48. 

  49.     int width, height;

  50.     unsigned int bpp, bppcount;

  51.     uint32_t palette[256];

  52.     int palette_is_set;

  53.     int le;

  54.     enum TiffCompr compr;

  55.     int invert;

  56.     int fax_opts;

  57.     int predictor;

  58.     int fill_order;

  59. 

  60.     int strips, rps, sstype;

  61.     int sot;

  62.     int stripsizesoff, stripsize, stripoff, strippos;

  63.     LZWState *lzw;

  64. 

  65.     uint8_t *deinvert_buf;

  66.     int deinvert_buf_size;

  67. 

  68.     int geotag_count;

  69.     TiffGeoTag *geotags;

  70. } TiffContext;

  71. 

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

  73. {

  74.     unsigned v = le ? bytestream2_get_le16(gb) : bytestream2_get_be16(gb);

  75.     return v;

  76. }

  77. 

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

  79. {

  80.     unsigned v = le ? bytestream2_get_le32(gb) : bytestream2_get_be32(gb);

  81.     return v;

  82. }

  83. 

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

  85. {

  86.     av_alias64 i = { .u64 = le ? bytestream2_get_le64(gb) : bytestream2_get_be64(gb)};

  87.     return i.f64;

  88. }

  89. 

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

  91. {

  92.     switch (type) {

  93.     case TIFF_BYTE : return bytestream2_get_byte(gb);

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

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

  96.     default        : return UINT_MAX;

  97.     }

  98. }

  99. 

  100. static void free_geotags(TiffContext *const s)

  101. {

  102.     int i;

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

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

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

  106.     }

  107.     av_freep(&s->geotags);

  108. }

  109. 

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

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

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

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

  114. 

  115. static const char *get_geokey_name(int key)

  116. {

  117.     RET_GEOKEY(VERT, vert, name);

  118.     RET_GEOKEY(PROJ, proj, name);

  119.     RET_GEOKEY(GEOG, geog, name);

  120.     RET_GEOKEY(CONF, conf, name);

  121. 

  122.     return NULL;

  123. }

  124. 

  125. static int get_geokey_type(int key)

  126. {

  127.     RET_GEOKEY(VERT, vert, type);

  128.     RET_GEOKEY(PROJ, proj, type);

  129.     RET_GEOKEY(GEOG, geog, type);

  130.     RET_GEOKEY(CONF, conf, type);

  131. 

  132.     return AVERROR_INVALIDDATA;

  133. }

  134. 

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

  136. {

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

  138. }

  139. 

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

  141. {

  142.     TiffGeoTagKeyName *r = bsearch(&id, keys, n, sizeof(keys[0]), cmp_id_key);

  143.     if(r)

  144.         return r->name;

  145. 

  146.     return NULL;

  147. }

  148. 

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

  150. {

  151.     char *ap;

  152. 

  153.     if (val == TIFF_GEO_KEY_UNDEFINED)

  154.         return av_strdup("undefined");

  155.     if (val == TIFF_GEO_KEY_USER_DEFINED)

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

  157. 

  158. #define RET_GEOKEY_VAL(TYPE, array)\

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

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

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

  162. 

  163.     switch (key) {

  164.     case TIFF_GT_MODEL_TYPE_GEOKEY:

  165.         RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);

  166.         break;

  167.     case TIFF_GT_RASTER_TYPE_GEOKEY:

  168.         RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);

  169.         break;

  170.     case TIFF_GEOG_LINEAR_UNITS_GEOKEY:

  171.     case TIFF_PROJ_LINEAR_UNITS_GEOKEY:

  172.     case TIFF_VERTICAL_UNITS_GEOKEY:

  173.         RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);

  174.         break;

  175.     case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:

  176.     case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:

  177.         RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);

  178.         break;

  179.     case TIFF_GEOGRAPHIC_TYPE_GEOKEY:

  180.         RET_GEOKEY_VAL(GCS_TYPE, gcs_type);

  181.         RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);

  182.         break;

  183.     case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:

  184.         RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);

  185.         RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);

  186.         break;

  187.     case TIFF_GEOG_ELLIPSOID_GEOKEY:

  188.         RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);

  189.         break;

  190.     case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:

  191.         RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);

  192.         break;

  193.     case TIFF_PROJECTED_CS_TYPE_GEOKEY:

  194.         ap = av_strdup(search_keyval(ff_tiff_proj_cs_type_codes, FF_ARRAY_ELEMS(ff_tiff_proj_cs_type_codes), val));

  195.         if(ap) return ap;

  196.         break;

  197.     case TIFF_PROJECTION_GEOKEY:

  198.         ap = av_strdup(search_keyval(ff_tiff_projection_codes, FF_ARRAY_ELEMS(ff_tiff_projection_codes), val));

  199.         if(ap) return ap;

  200.         break;

  201.     case TIFF_PROJ_COORD_TRANS_GEOKEY:

  202.         RET_GEOKEY_VAL(COORD_TRANS, coord_trans);

  203.         break;

  204.     case TIFF_VERTICAL_CS_TYPE_GEOKEY:

  205.         RET_GEOKEY_VAL(VERT_CS, vert_cs);

  206.         RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);

  207.         break;

  208. 

  209.     }

  210. 

  211.     ap = av_malloc(14);

  212.     if (ap)

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

  214.     return ap;

  215. }

  216. 

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

  218. {

  219.     int i;

  220.     char *ap, *ap0;

  221.     uint64_t component_len;

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

  223.     component_len = 15LL + strlen(sep);

  224.     if (count >= (INT_MAX - 1)/component_len)

  225.         return NULL;

  226.     ap = av_malloc(component_len * count + 1);

  227.     if (!ap)

  228.         return NULL;

  229.     ap0   = ap;

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

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

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

  233.         if(l >= component_len) {

  234.             av_free(ap0);

  235.             return NULL;

  236.         }

  237.         ap += l;

  238.     }

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

  240.     return ap0;

  241. }

  242. 

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

  244. {

  245.     int i;

  246.     char *ap, *ap0;

  247.     uint64_t component_len;

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

  249.     component_len = 7LL + strlen(sep);

  250.     if (count >= (INT_MAX - 1)/component_len)

  251.         return NULL;

  252.     ap = av_malloc(component_len * count + 1);

  253.     if (!ap)

  254.         return NULL;

  255.     ap0   = ap;

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

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

  258.         unsigned l = snprintf(ap, component_len, "%d%s", sp[i], sep);

  259.         if (l >= component_len) {

  260.             av_free(ap0);

  261.             return NULL;

  262.         }

  263.         ap += l;

  264.     }

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

  266.     return ap0;

  267. }

  268. 

  269. static int add_doubles_metadata(int count,

  270.                                 const char *name, const char *sep,

  271.                                 TiffContext *s)

  272. {

  273.     char *ap;

  274.     int i;

  275.     double *dp;

  276. 

  277.     if (count >= INT_MAX / sizeof(int64_t) || count <= 0)

  278.         return AVERROR_INVALIDDATA;

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

  280.         return AVERROR_INVALIDDATA;

  281. 

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

  283.     if (!dp)

  284.         return AVERROR(ENOMEM);

  285. 

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

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

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

  289.     av_freep(&dp);

  290.     if (!ap)

  291.         return AVERROR(ENOMEM);

  292.     av_dict_set(avpriv_frame_get_metadatap(&s->picture), name, ap, AV_DICT_DONT_STRDUP_VAL);

  293.     return 0;

  294. }

  295. 

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

  297.                                const char *sep, TiffContext *s)

  298. {

  299.     char *ap;

  300.     int i;

  301.     int16_t *sp;

  302. 

  303.     if (count >= INT_MAX / sizeof(int16_t) || count <= 0)

  304.         return AVERROR_INVALIDDATA;

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

  306.         return AVERROR_INVALIDDATA;

  307. 

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

  309.     if (!sp)

  310.         return AVERROR(ENOMEM);

  311. 

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

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

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

  315.     av_freep(&sp);

  316.     if (!ap)

  317.         return AVERROR(ENOMEM);

  318.     av_dict_set(avpriv_frame_get_metadatap(&s->picture), name, ap, AV_DICT_DONT_STRDUP_VAL);

  319.     return 0;

  320. }

  321. 

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

  323.                                TiffContext *s)

  324. {

  325.     char *value;

  326. 

  327.     if (bytestream2_get_bytes_left(&s->gb) < count || count < 0)

  328.         return AVERROR_INVALIDDATA;

  329. 

  330.     value = av_malloc(count + 1);

  331.     if (!value)

  332.         return AVERROR(ENOMEM);

  333. 

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

  335.     value[count] = 0;

  336. 

  337.     av_dict_set(avpriv_frame_get_metadatap(&s->picture), name, value, AV_DICT_DONT_STRDUP_VAL);

  338.     return 0;

  339. }

  340. 

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

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

  343. {

  344.     switch(type) {

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

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

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

  348.     default         : return AVERROR_INVALIDDATA;

  349.     };

  350. }

  351. 

  352. #if CONFIG_ZLIB

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

  354.                            int size)

  355. {

  356.     z_stream zstream = { 0 };

  357.     int zret;

  358. 

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

  360.     zstream.avail_in = size;

  361.     zstream.next_out = dst;

  362.     zstream.avail_out = *len;

  363.     zret = inflateInit(&zstream);

  364.     if (zret != Z_OK) {

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

  366.         return zret;

  367.     }

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

  369.     inflateEnd(&zstream);

  370.     *len = zstream.total_out;

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

  372. }

  373. #endif

  374. 

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

  376.                                              int usePtr, const uint8_t *src,

  377.                                              uint8_t c, int width, int offset)

  378. {

  379.     switch (bpp) {

  380.     case 1:

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

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

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

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

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

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

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

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

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

  390.         }

  391.         break;

  392.     case 2:

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

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

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

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

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

  398.         }

  399.         break;

  400.     case 4:

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

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

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

  404.         }

  405.         break;

  406.     default:

  407.         if (usePtr) {

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

  409.         } else {

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

  411.         }

  412.     }

  413. }

  414. 

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

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

  417. {

  418.     int c, line, pixels, code, ret;

  419.     const uint8_t *ssrc = src;

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

  421. 

  422.     if (size <= 0)

  423.         return AVERROR_INVALIDDATA;

  424. 

  425. #if CONFIG_ZLIB

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

  427.         uint8_t *src2 = NULL, *zbuf;

  428.         unsigned long outlen;

  429.         int i, ret;

  430.         outlen = width * lines;

  431.         zbuf = av_malloc(outlen);

  432.         if (!zbuf)

  433.             return AVERROR(ENOMEM);

  434.         if (s->fill_order) {

  435.             src2 = av_malloc((unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE);

  436.             if (!src2) {

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

  438.                 av_free(zbuf);

  439.                 return AVERROR(ENOMEM);

  440.             }

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

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

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

  444.             src = src2;

  445.         }

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

  447.         if (ret != Z_OK) {

  448.             av_log(s->avctx, AV_LOG_ERROR,

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

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

  451.             av_free(src2);

  452.             av_free(zbuf);

  453.             return AVERROR_UNKNOWN;

  454.         }

  455.         src = zbuf;

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

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

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

  459.             }else{

  460.                 memcpy(dst, src, width);

  461.             }

  462.             dst += stride;

  463.             src += width;

  464.         }

  465.         av_free(src2);

  466.         av_free(zbuf);

  467.         return 0;

  468.     }

  469. #endif

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

  471.         if (s->fill_order) {

  472.             int i;

  473.             av_fast_padded_malloc(&s->deinvert_buf, &s->deinvert_buf_size, size);

  474.             if (!s->deinvert_buf)

  475.                 return AVERROR(ENOMEM);

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

  477.                 s->deinvert_buf[i] = ff_reverse[src[i]];

  478.             src = s->deinvert_buf;

  479.             ssrc = src;

  480.         }

  481.         if (size > 1 && !src[0] && (src[1]&1)) {

  482.             av_log(s->avctx, AV_LOG_ERROR, "Old style LZW is unsupported\n");

  483.         }

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

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

  486.             return ret;

  487.         }

  488.     }

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

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

  491.         int i, ret = 0;

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

  493.                                   FF_INPUT_BUFFER_PADDING_SIZE);

  494. 

  495.         if (!src2) {

  496.             av_log(s->avctx, AV_LOG_ERROR,

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

  498.             return AVERROR(ENOMEM);

  499.         }

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

  501.             av_log(s->avctx, AV_LOG_ERROR,

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

  503.             av_free(src2);

  504.             return AVERROR_INVALIDDATA;

  505.         }

  506.         if (!s->fill_order) {

  507.             memcpy(src2, src, size);

  508.         } else {

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

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

  511.         }

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

  513.         switch (s->compr) {

  514.         case TIFF_CCITT_RLE:

  515.         case TIFF_G3:

  516.         case TIFF_G4:

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

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

  519.             break;

  520.         }

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

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

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

  524.                 dst += stride;

  525.             }

  526.         av_free(src2);

  527.         return ret;

  528.     }

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

  530.         if (src - ssrc > size) {

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

  532.             return AVERROR_INVALIDDATA;

  533.         }

  534.         switch (s->compr) {

  535.         case TIFF_RAW:

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

  537.                 return AVERROR_INVALIDDATA;

  538.             if (!s->fill_order) {

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

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

  541.             } else {

  542.                 int i;

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

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

  545.             }

  546.             src += width;

  547.             break;

  548.         case TIFF_PACKBITS:

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

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

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

  552.                     return AVERROR_INVALIDDATA;

  553.                 }

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

  555.                 if (code >= 0) {

  556.                     code++;

  557.                     if (pixels + code > width) {

  558.                         av_log(s->avctx, AV_LOG_ERROR,

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

  560.                         return AVERROR_INVALIDDATA;

  561.                     }

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

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

  564.                         return AVERROR_INVALIDDATA;

  565.                     }

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

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

  568.                     src += code;

  569.                     pixels += code;

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

  571.                     code = (-code) + 1;

  572.                     if (pixels + code > width) {

  573.                         av_log(s->avctx, AV_LOG_ERROR,

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

  575.                         return AVERROR_INVALIDDATA;

  576.                     }

  577.                     c = *src++;

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

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

  580.                     pixels += code;

  581.                 }

  582.             }

  583.             break;

  584.         case TIFF_LZW:

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

  586.             if (pixels < width) {

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

  588.                        pixels, width);

  589.                 return AVERROR_INVALIDDATA;

  590.             }

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

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

  593.             break;

  594.         }

  595.         dst += stride;

  596.     }

  597.     return 0;

  598. }

  599. 

  600. static int init_image(TiffContext *s, AVFrame *frame)

  601. {

  602.     int i, ret;

  603.     uint32_t *pal;

  604. 

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

  606.     case 11:

  607.         if (!s->palette_is_set) {

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

  609.             break;

  610.         }

  611.     case 21:

  612.     case 41:

  613.     case 81:

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

  615.         break;

  616.     case 243:

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

  618.         break;

  619.     case 161:

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

  621.         break;

  622.     case 162:

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

  624.         break;

  625.     case 324:

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

  627.         break;

  628.     case 483:

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

  630.         break;

  631.     case 644:

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

  633.         break;

  634.     default:

  635.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  638.         return AVERROR_INVALIDDATA;

  639.     }

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

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

  642.             return ret;

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

  644.     }

  645.     if ((ret = ff_get_buffer(s->avctx, frame, 0)) < 0) {

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

  647.         return ret;

  648.     }

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

  650.         if (s->palette_is_set) {

  651.             memcpy(frame->data[1], s->palette, sizeof(s->palette));

  652.         } else {

  653.             /* make default grayscale pal */

  654.             pal = (uint32_t *) frame->data[1];

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

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

  657.         }

  658.     }

  659.     return 0;

  660. }

  661. 

  662. static int tiff_decode_tag(TiffContext *s)

  663. {

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

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

  666.     int ret;

  667.     uint32_t *pal;

  668.     double *dp;

  669. 

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

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

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

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

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

  675. 

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

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

  678.                type);

  679.         return 0;

  680.     }

  681. 

  682.     if (count == 1) {

  683.         switch (type) {

  684.         case TIFF_BYTE:

  685.         case TIFF_SHORT:

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

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

  688.             break;

  689.         case TIFF_LONG:

  690.             value = off;

  691.             break;

  692.         case TIFF_STRING:

  693.             if (count <= 4) {

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

  695.                 break;

  696.             }

  697.         default:

  698.             value = UINT_MAX;

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

  700.         }

  701.     } else {

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

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

  704.         } else {

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

  706.         }

  707.     }

  708. 

  709.     switch (tag) {

  710.     case TIFF_WIDTH:

  711.         s->width = value;

  712.         break;

  713.     case TIFF_HEIGHT:

  714.         s->height = value;

  715.         break;

  716.     case TIFF_BPP:

  717.         s->bppcount = count;

  718.         if (count > 4) {

  719.             av_log(s->avctx, AV_LOG_ERROR,

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

  721.                    s->bpp, count);

  722.             return AVERROR_INVALIDDATA;

  723.         }

  724.         if (count == 1)

  725.             s->bpp = value;

  726.         else {

  727.             switch (type) {

  728.             case TIFF_BYTE:

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

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

  731.                 break;

  732.             case TIFF_SHORT:

  733.             case TIFF_LONG:

  734.                 s->bpp = 0;

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

  736.                     return AVERROR_INVALIDDATA;

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

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

  739.                 break;

  740.             default:

  741.                 s->bpp = -1;

  742.             }

  743.         }

  744.         break;

  745.     case TIFF_SAMPLES_PER_PIXEL:

  746.         if (count != 1) {

  747.             av_log(s->avctx, AV_LOG_ERROR,

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

  749.             return AVERROR_INVALIDDATA;

  750.         }

  751.         if (value > 4U) {

  752.             av_log(s->avctx, AV_LOG_ERROR,

  753.                    "Samples per pixel %d is too large\n", value);

  754.             return AVERROR_INVALIDDATA;

  755.         }

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

  757.             s->bpp *= value;

  758.         s->bppcount = value;

  759.         break;

  760.     case TIFF_COMPR:

  761.         s->compr = value;

  762.         s->predictor = 0;

  763.         switch (s->compr) {

  764.         case TIFF_RAW:

  765.         case TIFF_PACKBITS:

  766.         case TIFF_LZW:

  767.         case TIFF_CCITT_RLE:

  768.             break;

  769.         case TIFF_G3:

  770.         case TIFF_G4:

  771.             s->fax_opts = 0;

  772.             break;

  773.         case TIFF_DEFLATE:

  774.         case TIFF_ADOBE_DEFLATE:

  775. #if CONFIG_ZLIB

  776.             break;

  777. #else

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

  779.             return AVERROR(ENOSYS);

  780. #endif

  781.         case TIFF_JPEG:

  782.         case TIFF_NEWJPEG:

  783.             av_log(s->avctx, AV_LOG_ERROR,

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

  785.             return AVERROR_PATCHWELCOME;

  786.         default:

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

  788.                    s->compr);

  789.             return AVERROR_INVALIDDATA;

  790.         }

  791.         break;

  792.     case TIFF_ROWSPERSTRIP:

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

  794.             value = s->height;

  795.         if (value < 1) {

  796.             av_log(s->avctx, AV_LOG_ERROR,

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

  798.             return AVERROR_INVALIDDATA;

  799.         }

  800.         s->rps = value;

  801.         break;

  802.     case TIFF_STRIP_OFFS:

  803.         if (count == 1) {

  804.             s->strippos = 0;

  805.             s->stripoff = value;

  806.         } else

  807.             s->strippos = off;

  808.         s->strips = count;

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

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

  811.         s->sot = type;

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

  813.             av_log(s->avctx, AV_LOG_ERROR,

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

  815.             return AVERROR_INVALIDDATA;

  816.         }

  817.         break;

  818.     case TIFF_STRIP_SIZE:

  819.         if (count == 1) {

  820.             s->stripsizesoff = 0;

  821.             s->stripsize = value;

  822.             s->strips = 1;

  823.         } else {

  824.             s->stripsizesoff = off;

  825.         }

  826.         s->strips = count;

  827.         s->sstype = type;

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

  829.             av_log(s->avctx, AV_LOG_ERROR,

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

  831.             return AVERROR_INVALIDDATA;

  832.         }

  833.         break;

  834.     case TIFF_TILE_BYTE_COUNTS:

  835.     case TIFF_TILE_LENGTH:

  836.     case TIFF_TILE_OFFSETS:

  837.     case TIFF_TILE_WIDTH:

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

  839.         return AVERROR_PATCHWELCOME;

  840.         break;

  841.     case TIFF_PREDICTOR:

  842.         s->predictor = value;

  843.         break;

  844.     case TIFF_INVERT:

  845.         switch (value) {

  846.         case 0:

  847.             s->invert = 1;

  848.             break;

  849.         case 1:

  850.             s->invert = 0;

  851.             break;

  852.         case 2:

  853.         case 3:

  854.             break;

  855.         default:

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

  857.                    value);

  858.             return AVERROR_INVALIDDATA;

  859.         }

  860.         break;

  861.     case TIFF_FILL_ORDER:

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

  863.             av_log(s->avctx, AV_LOG_ERROR,

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

  865.             value = 1;

  866.         }

  867.         s->fill_order = value - 1;

  868.         break;

  869.     case TIFF_PAL:

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

  871.         off = type_sizes[type];

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

  873.             return AVERROR_INVALIDDATA;

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

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

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

  877.                 if (k == 2)

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

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

  880.                 pal[i] |= j;

  881.             }

  882.         }

  883.         s->palette_is_set = 1;

  884.         break;

  885.     case TIFF_PLANAR:

  886.         if (value == 2) {

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

  888.             return AVERROR_PATCHWELCOME;

  889.         }

  890.         break;

  891.     case TIFF_T4OPTIONS:

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

  893.             s->fax_opts = value;

  894.         break;

  895.     case TIFF_T6OPTIONS:

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

  897.             s->fax_opts = value;

  898.         break;

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

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

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

  902.         return ret;\

  903.     }

  904.     case TIFF_MODEL_PIXEL_SCALE:

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

  906.         break;

  907.     case TIFF_MODEL_TRANSFORMATION:

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

  909.         break;

  910.     case TIFF_MODEL_TIEPOINT:

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

  912.         break;

  913.     case TIFF_GEO_KEY_DIRECTORY:

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

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

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

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

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

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

  920.         }

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

  922.             s->geotag_count = 0;

  923.             return -1;

  924.         }

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

  926.         if (!s->geotags) {

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

  928.             s->geotag_count = 0;

  929.             return AVERROR(ENOMEM);

  930.         }

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

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

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

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

  935. 

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

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

  938.             else

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

  940.         }

  941.         break;

  942.     case TIFF_GEO_DOUBLE_PARAMS:

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

  944.             return AVERROR_INVALIDDATA;

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

  946.             return AVERROR_INVALIDDATA;

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

  948.         if (!dp) {

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

  950.             return AVERROR(ENOMEM);

  951.         }

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

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

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

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

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

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

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

  959.                 } else {

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

  961.                     if (!ap) {

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

  963.                         av_freep(&dp);

  964.                         return AVERROR(ENOMEM);

  965.                     }

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

  967.                 }

  968.             }

  969.         }

  970.         av_freep(&dp);

  971.         break;

  972.     case TIFF_GEO_ASCII_PARAMS:

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

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

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

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

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

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

  979.                 } else {

  980.                     char *ap;

  981. 

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

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

  984.                         return AVERROR_INVALIDDATA;

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

  986.                     if (!ap) {

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

  988.                         return AVERROR(ENOMEM);

  989.                     }

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

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

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

  993.                 }

  994.             }

  995.         }

  996.         break;

  997.     case TIFF_ARTIST:

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

  999.         break;

  1000.     case TIFF_COPYRIGHT:

  1001.         ADD_METADATA(count, "copyright", NULL);

  1002.         break;

  1003.     case TIFF_DATE:

  1004.         ADD_METADATA(count, "date", NULL);

  1005.         break;

  1006.     case TIFF_DOCUMENT_NAME:

  1007.         ADD_METADATA(count, "document_name", NULL);

  1008.         break;

  1009.     case TIFF_HOST_COMPUTER:

  1010.         ADD_METADATA(count, "computer", NULL);

  1011.         break;

  1012.     case TIFF_IMAGE_DESCRIPTION:

  1013.         ADD_METADATA(count, "description", NULL);

  1014.         break;

  1015.     case TIFF_MAKE:

  1016.         ADD_METADATA(count, "make", NULL);

  1017.         break;

  1018.     case TIFF_MODEL:

  1019.         ADD_METADATA(count, "model", NULL);

  1020.         break;

  1021.     case TIFF_PAGE_NAME:

  1022.         ADD_METADATA(count, "page_name", NULL);

  1023.         break;

  1024.     case TIFF_PAGE_NUMBER:

  1025.         ADD_METADATA(count, "page_number", " / ");

  1026.         break;

  1027.     case TIFF_SOFTWARE_NAME:

  1028.         ADD_METADATA(count, "software", NULL);

  1029.         break;

  1030.     default:

  1031.         av_log(s->avctx, AV_LOG_DEBUG, "Unknown or unsupported tag %d/0X%0X\n",

  1032.                tag, tag);

  1033.     }

  1034.     bytestream2_seek(&s->gb, start, SEEK_SET);

  1035.     return 0;

  1036. }

  1037. 

  1038. static int decode_frame(AVCodecContext *avctx,

  1039.                         void *data, int *got_frame, AVPacket *avpkt)

  1040. {

  1041.     TiffContext *const s = avctx->priv_data;

  1042.     AVFrame *const p = data;

  1043.     unsigned off;

  1044.     int id, le, ret;

  1045.     int i, j, entries;

  1046.     int stride;

  1047.     unsigned soff, ssize;

  1048.     uint8_t *dst;

  1049.     GetByteContext stripsizes;

  1050.     GetByteContext stripdata;

  1051. 

  1052.     bytestream2_init(&s->gb, avpkt->data, avpkt->size);

  1053. 

  1054.     //parse image header

  1055.     if (avpkt->size < 8)

  1056.         return AVERROR_INVALIDDATA;

  1057.     id = bytestream2_get_le16u(&s->gb);

  1058.     if (id == 0x4949)

  1059.         le = 1;

  1060.     else if (id == 0x4D4D)

  1061.         le = 0;

  1062.     else {

  1063.         av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");

  1064.         return AVERROR_INVALIDDATA;

  1065.     }

  1066.     s->le = le;

  1067.     // TIFF_BPP is not a required tag and defaults to 1

  1068.     s->bppcount = s->bpp = 1;

  1069.     s->invert = 0;

  1070.     s->compr = TIFF_RAW;

  1071.     s->fill_order = 0;

  1072.     free_geotags(s);

  1073.     /* metadata has been destroyed from lavc internals, that pointer is not

  1074.      * valid anymore */

  1075.     av_frame_set_metadata(p, NULL);

  1076. 

  1077.     // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number

  1078.     // that further identifies the file as a TIFF file"

  1079.     if (tget_short(&s->gb, le) != 42) {

  1080.         av_log(avctx, AV_LOG_ERROR,

  1081.                "The answer to life, universe and everything is not correct!\n");

  1082.         return AVERROR_INVALIDDATA;

  1083.     }

  1084.     // Reset these offsets so we can tell if they were set this frame

  1085.     s->stripsizesoff = s->strippos = 0;

  1086.     /* parse image file directory */

  1087.     off = tget_long(&s->gb, le);

  1088.     if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {

  1089.         av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");

  1090.         return AVERROR_INVALIDDATA;

  1091.     }

  1092.     bytestream2_seek(&s->gb, off, SEEK_SET);

  1093.     entries = tget_short(&s->gb, le);

  1094.     if (bytestream2_get_bytes_left(&s->gb) < entries * 12)

  1095.         return AVERROR_INVALIDDATA;

  1096.     for (i = 0; i < entries; i++) {

  1097.         if ((ret = tiff_decode_tag(s)) < 0)

  1098.             return ret;

  1099.     }

  1100. 

  1101.     for (i = 0; i<s->geotag_count; i++) {

  1102.         const char *keyname = get_geokey_name(s->geotags[i].key);

  1103.         if (!keyname) {

  1104.             av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);

  1105.             continue;

  1106.         }

  1107.         if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {

  1108.             av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);

  1109.             continue;

  1110.         }

  1111.         ret = av_dict_set(avpriv_frame_get_metadatap(&s->picture), keyname, s->geotags[i].val, 0);

  1112.         if (ret<0) {

  1113.             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);

  1114.             return ret;

  1115.         }

  1116.     }

  1117. 

  1118.     if (!s->strippos && !s->stripoff) {

  1119.         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");

  1120.         return AVERROR_INVALIDDATA;

  1121.     }

  1122.     /* now we have the data and may start decoding */

  1123.     if ((ret = init_image(s, p)) < 0)

  1124.         return ret;

  1125. 

  1126.     if (s->strips == 1 && !s->stripsize) {

  1127.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1128.         s->stripsize = avpkt->size - s->stripoff;

  1129.     }

  1130.     stride = p->linesize[0];

  1131.     dst = p->data[0];

  1132. 

  1133.     if (s->stripsizesoff) {

  1134.         if (s->stripsizesoff >= (unsigned)avpkt->size)

  1135.             return AVERROR_INVALIDDATA;

  1136.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff, avpkt->size - s->stripsizesoff);

  1137.     }

  1138.     if (s->strippos) {

  1139.         if (s->strippos >= (unsigned)avpkt->size)

  1140.             return AVERROR_INVALIDDATA;

  1141.         bytestream2_init(&stripdata, avpkt->data + s->strippos, avpkt->size - s->strippos);

  1142.     }

  1143. 

  1144.     if (s->rps <= 0) {

  1145.         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);

  1146.         return AVERROR_INVALIDDATA;

  1147.     }

  1148. 

  1149.     for (i = 0; i < s->height; i += s->rps) {

  1150.         if (s->stripsizesoff)

  1151.             ssize = tget(&stripsizes, s->sstype, s->le);

  1152.         else

  1153.             ssize = s->stripsize;

  1154. 

  1155.         if (s->strippos)

  1156.             soff = tget(&stripdata, s->sot, s->le);

  1157.         else

  1158.             soff = s->stripoff;

  1159. 

  1160.         if (soff > avpkt->size || ssize > avpkt->size - soff) {

  1161.             av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1162.             return AVERROR_INVALIDDATA;

  1163.         }

  1164.         if (tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize,

  1165.                               FFMIN(s->rps, s->height - i)) < 0)

  1166.             break;

  1167.         dst += s->rps * stride;

  1168.     }

  1169.     if (s->predictor == 2) {

  1170.         dst = p->data[0];

  1171.         soff = s->bpp >> 3;

  1172.         ssize = s->width * soff;

  1173.         if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1174.             s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE) {

  1175.             for (i = 0; i < s->height; i++) {

  1176.                 for (j = soff; j < ssize; j += 2)

  1177.                     AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1178.                 dst += stride;

  1179.             }

  1180.         } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1181.                    s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {

  1182.             for (i = 0; i < s->height; i++) {

  1183.                 for (j = soff; j < ssize; j += 2)

  1184.                     AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1185.                 dst += stride;

  1186.             }

  1187.         } else {

  1188.             for (i = 0; i < s->height; i++) {

  1189.                 for (j = soff; j < ssize; j++)

  1190.                     dst[j] += dst[j - soff];

  1191.                 dst += stride;

  1192.             }

  1193.         }

  1194.     }

  1195. 

  1196.     if (s->invert) {

  1197.         dst = p->data[0];

  1198.         for (i = 0; i < s->height; i++) {

  1199.             for (j = 0; j < p->linesize[0]; j++)

  1200.                 dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];

  1201.             dst += p->linesize[0];

  1202.         }

  1203.     }

  1204.     *got_frame = 1;

  1205. 

  1206.     return avpkt->size;

  1207. }

  1208. 

  1209. static av_cold int tiff_init(AVCodecContext *avctx)

  1210. {

  1211.     TiffContext *s = avctx->priv_data;

  1212. 

  1213.     s->width = 0;

  1214.     s->height = 0;

  1215.     s->avctx = avctx;

  1216.     ff_lzw_decode_open(&s->lzw);

  1217.     ff_ccitt_unpack_init();

  1218. 

  1219.     return 0;

  1220. }

  1221. 

  1222. static av_cold int tiff_end(AVCodecContext *avctx)

  1223. {

  1224.     TiffContext *const s = avctx->priv_data;

  1225. 

  1226.     free_geotags(s);

  1227. 

  1228.     ff_lzw_decode_close(&s->lzw);

  1229.     av_freep(&s->deinvert_buf);

  1230.     return 0;

  1231. }

  1232. 

  1233. AVCodec ff_tiff_decoder = {

  1234.     .name           = "tiff",

  1235.     .type           = AVMEDIA_TYPE_VIDEO,

  1236.     .id             = AV_CODEC_ID_TIFF,

  1237.     .priv_data_size = sizeof(TiffContext),

  1238.     .init           = tiff_init,

  1239.     .close          = tiff_end,

  1240.     .decode         = decode_frame,

  1241.     .capabilities   = CODEC_CAP_DR1,

  1242.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1243. };