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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. 

  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 planar;

  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, AVFrame *frame)

  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(frame), 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, AVFrame *frame)

  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(frame), 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, AVFrame *frame)

  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(frame), 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, AVFrame *frame)

  343. {

  344.     switch(type) {

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

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

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

  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 deinvert_buffer(TiffContext *s, const uint8_t *src, int size)

  416. {

  417.     int i;

  418. 

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

  420.     if (!s->deinvert_buf)

  421.         return AVERROR(ENOMEM);

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

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

  424. 

  425.     return 0;

  426. }

  427. 

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

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

  430. {

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

  432.     const uint8_t *ssrc = src;

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

  434. 

  435.     if (s->planar)

  436.         width /= s->bppcount;

  437. 

  438.     if (size <= 0)

  439.         return AVERROR_INVALIDDATA;

  440. 

  441. #if CONFIG_ZLIB

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

  443.         uint8_t *zbuf;

  444.         unsigned long outlen;

  445.         int ret;

  446.         outlen = width * lines;

  447.         zbuf = av_malloc(outlen);

  448.         if (!zbuf)

  449.             return AVERROR(ENOMEM);

  450.         if (s->fill_order) {

  451.             if ((ret = deinvert_buffer(s, src, size)) < 0)

  452.                 return ret;

  453.             ssrc = src = s->deinvert_buf;

  454.         }

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

  456.         if (ret != Z_OK) {

  457.             av_log(s->avctx, AV_LOG_ERROR,

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

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

  460.             av_free(zbuf);

  461.             return AVERROR_UNKNOWN;

  462.         }

  463.         src = zbuf;

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

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

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

  467.             }else{

  468.                 memcpy(dst, src, width);

  469.             }

  470.             dst += stride;

  471.             src += width;

  472.         }

  473.         av_free(zbuf);

  474.         return 0;

  475.     }

  476. #endif

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

  478.         if (s->fill_order) {

  479.             if ((ret = deinvert_buffer(s, src, size)) < 0)

  480.                 return ret;

  481.             ssrc = src = s->deinvert_buf;

  482.         }

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

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

  485.         }

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

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

  488.             return ret;

  489.         }

  490.     }

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

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

  493.         int i, ret = 0;

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

  495.                                   FF_INPUT_BUFFER_PADDING_SIZE);

  496. 

  497.         if (!src2) {

  498.             av_log(s->avctx, AV_LOG_ERROR,

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

  500.             return AVERROR(ENOMEM);

  501.         }

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

  503.             av_log(s->avctx, AV_LOG_ERROR,

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

  505.             av_free(src2);

  506.             return AVERROR_INVALIDDATA;

  507.         }

  508.         if (!s->fill_order) {

  509.             memcpy(src2, src, size);

  510.         } else {

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

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

  513.         }

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

  515.         switch (s->compr) {

  516.         case TIFF_CCITT_RLE:

  517.         case TIFF_G3:

  518.         case TIFF_G4:

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

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

  521.             break;

  522.         }

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

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

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

  526.                 dst += stride;

  527.             }

  528.         av_free(src2);

  529.         return ret;

  530.     }

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

  532.         if (src - ssrc > size) {

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

  534.             return AVERROR_INVALIDDATA;

  535.         }

  536.         switch (s->compr) {

  537.         case TIFF_RAW:

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

  539.                 return AVERROR_INVALIDDATA;

  540.             if (!s->fill_order) {

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

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

  543.             } else {

  544.                 int i;

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

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

  547.             }

  548.             src += width;

  549.             break;

  550.         case TIFF_PACKBITS:

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

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

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

  554.                     return AVERROR_INVALIDDATA;

  555.                 }

  556.                 code = s->fill_order ? (int8_t) ff_reverse[*src++]: (int8_t) *src++;

  557.                 if (code >= 0) {

  558.                     code++;

  559.                     if (pixels + code > width) {

  560.                         av_log(s->avctx, AV_LOG_ERROR,

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

  562.                         return AVERROR_INVALIDDATA;

  563.                     }

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

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

  566.                         return AVERROR_INVALIDDATA;

  567.                     }

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

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

  570.                     src += code;

  571.                     pixels += code;

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

  573.                     code = (-code) + 1;

  574.                     if (pixels + code > width) {

  575.                         av_log(s->avctx, AV_LOG_ERROR,

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

  577.                         return AVERROR_INVALIDDATA;

  578.                     }

  579.                     c = *src++;

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

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

  582.                     pixels += code;

  583.                 }

  584.             }

  585.             if (s->fill_order) {

  586.                 int i;

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

  588.                     dst[i] = ff_reverse[dst[i]];

  589.             }

  590.             break;

  591.         case TIFF_LZW:

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

  593.             if (pixels < width) {

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

  595.                        pixels, width);

  596.                 return AVERROR_INVALIDDATA;

  597.             }

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

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

  600.             break;

  601.         }

  602.         dst += stride;

  603.     }

  604.     return 0;

  605. }

  606. 

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

  608. {

  609.     int i, ret;

  610.     uint32_t *pal;

  611. 

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

  613.     case 11:

  614.         if (!s->palette_is_set) {

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

  616.             break;

  617.         }

  618.     case 21:

  619.     case 41:

  620.     case 81:

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

  622.         break;

  623.     case 243:

  624.         s->avctx->pix_fmt = s->planar ? AV_PIX_FMT_GBRP : AV_PIX_FMT_RGB24;

  625.         break;

  626.     case 161:

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

  628.         break;

  629.     case 162:

  630.         s->avctx->pix_fmt = s->planar ? AV_PIX_FMT_NONE : AV_PIX_FMT_GRAY8A;

  631.         break;

  632.     case 324:

  633.         s->avctx->pix_fmt = s->planar ? AV_PIX_FMT_GBRAP : AV_PIX_FMT_RGBA;

  634.         break;

  635.     case 483:

  636.         s->avctx->pix_fmt = s->planar ? (s->le ? AV_PIX_FMT_GBRP16LE : AV_PIX_FMT_GBRP16BE) :

  637.                                         (s->le ? AV_PIX_FMT_RGB48LE  : AV_PIX_FMT_RGB48BE);

  638.         break;

  639.     case 644:

  640.         s->avctx->pix_fmt = s->planar ? (s->le ? AV_PIX_FMT_GBRAP16LE : AV_PIX_FMT_GBRAP16BE) :

  641.                                         (s->le ? AV_PIX_FMT_RGBA64LE  : AV_PIX_FMT_RGBA64BE);

  642.         break;

  643.     default:

  644.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  647.         return AVERROR_INVALIDDATA;

  648.     }

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

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

  651.             return ret;

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

  653.     }

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

  655.         return ret;

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

  657.         if (s->palette_is_set) {

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

  659.         } else {

  660.             /* make default grayscale pal */

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

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

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

  664.         }

  665.     }

  666.     return 0;

  667. }

  668. 

  669. static int tiff_decode_tag(TiffContext *s, AVFrame *frame)

  670. {

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

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

  673.     int ret;

  674.     uint32_t *pal;

  675.     double *dp;

  676. 

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

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

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

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

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

  682. 

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

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

  685.                type);

  686.         return 0;

  687.     }

  688. 

  689.     if (count == 1) {

  690.         switch (type) {

  691.         case TIFF_BYTE:

  692.         case TIFF_SHORT:

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

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

  695.             break;

  696.         case TIFF_LONG:

  697.             value = off;

  698.             break;

  699.         case TIFF_STRING:

  700.             if (count <= 4) {

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

  702.                 break;

  703.             }

  704.         default:

  705.             value = UINT_MAX;

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

  707.         }

  708.     } else {

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

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

  711.         } else {

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

  713.         }

  714.     }

  715. 

  716.     switch (tag) {

  717.     case TIFF_WIDTH:

  718.         s->width = value;

  719.         break;

  720.     case TIFF_HEIGHT:

  721.         s->height = value;

  722.         break;

  723.     case TIFF_BPP:

  724.         s->bppcount = count;

  725.         if (count > 4) {

  726.             av_log(s->avctx, AV_LOG_ERROR,

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

  728.                    s->bpp, count);

  729.             return AVERROR_INVALIDDATA;

  730.         }

  731.         if (count == 1)

  732.             s->bpp = value;

  733.         else {

  734.             switch (type) {

  735.             case TIFF_BYTE:

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

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

  738.                 break;

  739.             case TIFF_SHORT:

  740.             case TIFF_LONG:

  741.                 s->bpp = 0;

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

  743.                     return AVERROR_INVALIDDATA;

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

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

  746.                 break;

  747.             default:

  748.                 s->bpp = -1;

  749.             }

  750.         }

  751.         break;

  752.     case TIFF_SAMPLES_PER_PIXEL:

  753.         if (count != 1) {

  754.             av_log(s->avctx, AV_LOG_ERROR,

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

  756.             return AVERROR_INVALIDDATA;

  757.         }

  758.         if (value > 4U) {

  759.             av_log(s->avctx, AV_LOG_ERROR,

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

  761.             return AVERROR_INVALIDDATA;

  762.         }

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

  764.             s->bpp *= value;

  765.         s->bppcount = value;

  766.         break;

  767.     case TIFF_COMPR:

  768.         s->compr = value;

  769.         s->predictor = 0;

  770.         switch (s->compr) {

  771.         case TIFF_RAW:

  772.         case TIFF_PACKBITS:

  773.         case TIFF_LZW:

  774.         case TIFF_CCITT_RLE:

  775.             break;

  776.         case TIFF_G3:

  777.         case TIFF_G4:

  778.             s->fax_opts = 0;

  779.             break;

  780.         case TIFF_DEFLATE:

  781.         case TIFF_ADOBE_DEFLATE:

  782. #if CONFIG_ZLIB

  783.             break;

  784. #else

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

  786.             return AVERROR(ENOSYS);

  787. #endif

  788.         case TIFF_JPEG:

  789.         case TIFF_NEWJPEG:

  790.             av_log(s->avctx, AV_LOG_ERROR,

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

  792.             return AVERROR_PATCHWELCOME;

  793.         default:

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

  795.                    s->compr);

  796.             return AVERROR_INVALIDDATA;

  797.         }

  798.         break;

  799.     case TIFF_ROWSPERSTRIP:

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

  801.             value = s->height;

  802.         if (value < 1) {

  803.             av_log(s->avctx, AV_LOG_ERROR,

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

  805.             return AVERROR_INVALIDDATA;

  806.         }

  807.         s->rps = value;

  808.         break;

  809.     case TIFF_STRIP_OFFS:

  810.         if (count == 1) {

  811.             s->strippos = 0;

  812.             s->stripoff = value;

  813.         } else

  814.             s->strippos = off;

  815.         s->strips = count;

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

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

  818.         s->sot = type;

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

  820.             av_log(s->avctx, AV_LOG_ERROR,

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

  822.             return AVERROR_INVALIDDATA;

  823.         }

  824.         break;

  825.     case TIFF_STRIP_SIZE:

  826.         if (count == 1) {

  827.             s->stripsizesoff = 0;

  828.             s->stripsize = value;

  829.             s->strips = 1;

  830.         } else {

  831.             s->stripsizesoff = off;

  832.         }

  833.         s->strips = count;

  834.         s->sstype = type;

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

  836.             av_log(s->avctx, AV_LOG_ERROR,

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

  838.             return AVERROR_INVALIDDATA;

  839.         }

  840.         break;

  841.     case TIFF_TILE_BYTE_COUNTS:

  842.     case TIFF_TILE_LENGTH:

  843.     case TIFF_TILE_OFFSETS:

  844.     case TIFF_TILE_WIDTH:

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

  846.         return AVERROR_PATCHWELCOME;

  847.         break;

  848.     case TIFF_PREDICTOR:

  849.         s->predictor = value;

  850.         break;

  851.     case TIFF_INVERT:

  852.         switch (value) {

  853.         case 0:

  854.             s->invert = 1;

  855.             break;

  856.         case 1:

  857.             s->invert = 0;

  858.             break;

  859.         case 2:

  860.         case 3:

  861.             break;

  862.         default:

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

  864.                    value);

  865.             return AVERROR_INVALIDDATA;

  866.         }

  867.         break;

  868.     case TIFF_FILL_ORDER:

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

  870.             av_log(s->avctx, AV_LOG_ERROR,

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

  872.             value = 1;

  873.         }

  874.         s->fill_order = value - 1;

  875.         break;

  876.     case TIFF_PAL:

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

  878.         off = type_sizes[type];

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

  880.             return AVERROR_INVALIDDATA;

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

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

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

  884.                 if (k == 2)

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

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

  887.                 pal[i] |= j;

  888.             }

  889.         }

  890.         s->palette_is_set = 1;

  891.         break;

  892.     case TIFF_PLANAR:

  893.         s->planar = value == 2;

  894.         break;

  895.     case TIFF_T4OPTIONS:

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

  897.             s->fax_opts = value;

  898.         break;

  899.     case TIFF_T6OPTIONS:

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

  901.             s->fax_opts = value;

  902.         break;

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

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

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

  906.         return ret;\

  907.     }

  908.     case TIFF_MODEL_PIXEL_SCALE:

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

  910.         break;

  911.     case TIFF_MODEL_TRANSFORMATION:

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

  913.         break;

  914.     case TIFF_MODEL_TIEPOINT:

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

  916.         break;

  917.     case TIFF_GEO_KEY_DIRECTORY:

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

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

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

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

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

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

  924.         }

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

  926.             s->geotag_count = 0;

  927.             return -1;

  928.         }

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

  930.         if (!s->geotags) {

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

  932.             s->geotag_count = 0;

  933.             return AVERROR(ENOMEM);

  934.         }

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

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

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

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

  939. 

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

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

  942.             else

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

  944.         }

  945.         break;

  946.     case TIFF_GEO_DOUBLE_PARAMS:

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

  948.             return AVERROR_INVALIDDATA;

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

  950.             return AVERROR_INVALIDDATA;

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

  952.         if (!dp) {

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

  954.             return AVERROR(ENOMEM);

  955.         }

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

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

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

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

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

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

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

  963.                 } else {

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

  965.                     if (!ap) {

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

  967.                         av_freep(&dp);

  968.                         return AVERROR(ENOMEM);

  969.                     }

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

  971.                 }

  972.             }

  973.         }

  974.         av_freep(&dp);

  975.         break;

  976.     case TIFF_GEO_ASCII_PARAMS:

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

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

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

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

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

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

  983.                 } else {

  984.                     char *ap;

  985. 

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

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

  988.                         return AVERROR_INVALIDDATA;

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

  990.                     if (!ap) {

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

  992.                         return AVERROR(ENOMEM);

  993.                     }

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

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

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

  997.                 }

  998.             }

  999.         }

  1000.         break;

  1001.     case TIFF_ARTIST:

  1002.         ADD_METADATA(count, "artist", NULL);

  1003.         break;

  1004.     case TIFF_COPYRIGHT:

  1005.         ADD_METADATA(count, "copyright", NULL);

  1006.         break;

  1007.     case TIFF_DATE:

  1008.         ADD_METADATA(count, "date", NULL);

  1009.         break;

  1010.     case TIFF_DOCUMENT_NAME:

  1011.         ADD_METADATA(count, "document_name", NULL);

  1012.         break;

  1013.     case TIFF_HOST_COMPUTER:

  1014.         ADD_METADATA(count, "computer", NULL);

  1015.         break;

  1016.     case TIFF_IMAGE_DESCRIPTION:

  1017.         ADD_METADATA(count, "description", NULL);

  1018.         break;

  1019.     case TIFF_MAKE:

  1020.         ADD_METADATA(count, "make", NULL);

  1021.         break;

  1022.     case TIFF_MODEL:

  1023.         ADD_METADATA(count, "model", NULL);

  1024.         break;

  1025.     case TIFF_PAGE_NAME:

  1026.         ADD_METADATA(count, "page_name", NULL);

  1027.         break;

  1028.     case TIFF_PAGE_NUMBER:

  1029.         ADD_METADATA(count, "page_number", " / ");

  1030.         break;

  1031.     case TIFF_SOFTWARE_NAME:

  1032.         ADD_METADATA(count, "software", NULL);

  1033.         break;

  1034.     default:

  1035.         av_log(s->avctx, AV_LOG_DEBUG, "Unknown or unsupported tag %d/0X%0X\n",

  1036.                tag, tag);

  1037.     }

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

  1039.     return 0;

  1040. }

  1041. 

  1042. static int decode_frame(AVCodecContext *avctx,

  1043.                         void *data, int *got_frame, AVPacket *avpkt)

  1044. {

  1045.     TiffContext *const s = avctx->priv_data;

  1046.     AVFrame *const p = data;

  1047.     unsigned off;

  1048.     int id, le, ret, plane, planes;

  1049.     int i, j, entries;

  1050.     int stride;

  1051.     unsigned soff, ssize;

  1052.     uint8_t *dst;

  1053.     GetByteContext stripsizes;

  1054.     GetByteContext stripdata;

  1055. 

  1056.     bytestream2_init(&s->gb, avpkt->data, avpkt->size);

  1057. 

  1058.     //parse image header

  1059.     if (avpkt->size < 8)

  1060.         return AVERROR_INVALIDDATA;

  1061.     id = bytestream2_get_le16u(&s->gb);

  1062.     if (id == 0x4949)

  1063.         le = 1;

  1064.     else if (id == 0x4D4D)

  1065.         le = 0;

  1066.     else {

  1067.         av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");

  1068.         return AVERROR_INVALIDDATA;

  1069.     }

  1070.     s->le = le;

  1071.     // TIFF_BPP is not a required tag and defaults to 1

  1072.     s->bppcount = s->bpp = 1;

  1073.     s->invert = 0;

  1074.     s->compr = TIFF_RAW;

  1075.     s->fill_order = 0;

  1076.     free_geotags(s);

  1077. 

  1078.     // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number

  1079.     // that further identifies the file as a TIFF file"

  1080.     if (tget_short(&s->gb, le) != 42) {

  1081.         av_log(avctx, AV_LOG_ERROR,

  1082.                "The answer to life, universe and everything is not correct!\n");

  1083.         return AVERROR_INVALIDDATA;

  1084.     }

  1085.     // Reset these offsets so we can tell if they were set this frame

  1086.     s->stripsizesoff = s->strippos = 0;

  1087.     /* parse image file directory */

  1088.     off = tget_long(&s->gb, le);

  1089.     if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {

  1090.         av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");

  1091.         return AVERROR_INVALIDDATA;

  1092.     }

  1093.     bytestream2_seek(&s->gb, off, SEEK_SET);

  1094.     entries = tget_short(&s->gb, le);

  1095.     if (bytestream2_get_bytes_left(&s->gb) < entries * 12)

  1096.         return AVERROR_INVALIDDATA;

  1097.     for (i = 0; i < entries; i++) {

  1098.         if ((ret = tiff_decode_tag(s, p)) < 0)

  1099.             return ret;

  1100.     }

  1101. 

  1102.     for (i = 0; i<s->geotag_count; i++) {

  1103.         const char *keyname = get_geokey_name(s->geotags[i].key);

  1104.         if (!keyname) {

  1105.             av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);

  1106.             continue;

  1107.         }

  1108.         if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {

  1109.             av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);

  1110.             continue;

  1111.         }

  1112.         ret = av_dict_set(avpriv_frame_get_metadatap(p), keyname, s->geotags[i].val, 0);

  1113.         if (ret<0) {

  1114.             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);

  1115.             return ret;

  1116.         }

  1117.     }

  1118. 

  1119.     if (!s->strippos && !s->stripoff) {

  1120.         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");

  1121.         return AVERROR_INVALIDDATA;

  1122.     }

  1123.     /* now we have the data and may start decoding */

  1124.     if ((ret = init_image(s, p)) < 0)

  1125.         return ret;

  1126. 

  1127.     if (s->strips == 1 && !s->stripsize) {

  1128.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1129.         s->stripsize = avpkt->size - s->stripoff;

  1130.     }

  1131. 

  1132.     if (s->stripsizesoff) {

  1133.         if (s->stripsizesoff >= (unsigned)avpkt->size)

  1134.             return AVERROR_INVALIDDATA;

  1135.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff, avpkt->size - s->stripsizesoff);

  1136.     }

  1137.     if (s->strippos) {

  1138.         if (s->strippos >= (unsigned)avpkt->size)

  1139.             return AVERROR_INVALIDDATA;

  1140.         bytestream2_init(&stripdata, avpkt->data + s->strippos, avpkt->size - s->strippos);

  1141.     }

  1142. 

  1143.     if (s->rps <= 0) {

  1144.         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);

  1145.         return AVERROR_INVALIDDATA;

  1146.     }

  1147. 

  1148.     planes = s->planar ? s->bppcount : 1;

  1149.     for (plane = 0; plane < planes; plane++) {

  1150.         stride = p->linesize[plane];

  1151.         dst = p->data[plane];

  1152.     for (i = 0; i < s->height; i += s->rps) {

  1153.         if (s->stripsizesoff)

  1154.             ssize = tget(&stripsizes, s->sstype, s->le);

  1155.         else

  1156.             ssize = s->stripsize;

  1157. 

  1158.         if (s->strippos)

  1159.             soff = tget(&stripdata, s->sot, s->le);

  1160.         else

  1161.             soff = s->stripoff;

  1162. 

  1163.         if (soff > avpkt->size || ssize > avpkt->size - soff) {

  1164.             av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1165.             return AVERROR_INVALIDDATA;

  1166.         }

  1167.         if (tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize,

  1168.                               FFMIN(s->rps, s->height - i)) < 0)

  1169.             break;

  1170.         dst += s->rps * stride;

  1171.     }

  1172.     if (s->predictor == 2) {

  1173.         dst = p->data[plane];

  1174.         soff = s->bpp >> 3;

  1175.         ssize = s->width * soff;

  1176.         if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1177.             s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE) {

  1178.             for (i = 0; i < s->height; i++) {

  1179.                 for (j = soff; j < ssize; j += 2)

  1180.                     AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1181.                 dst += stride;

  1182.             }

  1183.         } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1184.                    s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {

  1185.             for (i = 0; i < s->height; i++) {

  1186.                 for (j = soff; j < ssize; j += 2)

  1187.                     AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1188.                 dst += stride;

  1189.             }

  1190.         } else {

  1191.             for (i = 0; i < s->height; i++) {

  1192.                 for (j = soff; j < ssize; j++)

  1193.                     dst[j] += dst[j - soff];

  1194.                 dst += stride;

  1195.             }

  1196.         }

  1197.     }

  1198. 

  1199.     if (s->invert) {

  1200.         dst = p->data[plane];

  1201.         for (i = 0; i < s->height; i++) {

  1202.             for (j = 0; j < p->linesize[plane]; j++)

  1203.                 dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];

  1204.             dst += p->linesize[plane];

  1205.         }

  1206.     }

  1207.     }

  1208. 

  1209.     if (s->planar && s->bppcount > 2) {

  1210.         FFSWAP(uint8_t*, p->data[0],     p->data[2]);

  1211.         FFSWAP(int,      p->linesize[0], p->linesize[2]);

  1212.         FFSWAP(uint8_t*, p->data[0],     p->data[1]);

  1213.         FFSWAP(int,      p->linesize[0], p->linesize[1]);

  1214.     }

  1215. 

  1216.     *got_frame = 1;

  1217. 

  1218.     return avpkt->size;

  1219. }

  1220. 

  1221. static av_cold int tiff_init(AVCodecContext *avctx)

  1222. {

  1223.     TiffContext *s = avctx->priv_data;

  1224. 

  1225.     s->width = 0;

  1226.     s->height = 0;

  1227.     s->avctx = avctx;

  1228.     ff_lzw_decode_open(&s->lzw);

  1229.     ff_ccitt_unpack_init();

  1230. 

  1231.     return 0;

  1232. }

  1233. 

  1234. static av_cold int tiff_end(AVCodecContext *avctx)

  1235. {

  1236.     TiffContext *const s = avctx->priv_data;

  1237. 

  1238.     free_geotags(s);

  1239. 

  1240.     ff_lzw_decode_close(&s->lzw);

  1241.     av_freep(&s->deinvert_buf);

  1242.     return 0;

  1243. }

  1244. 

  1245. AVCodec ff_tiff_decoder = {

  1246.     .name           = "tiff",

  1247.     .type           = AVMEDIA_TYPE_VIDEO,

  1248.     .id             = AV_CODEC_ID_TIFF,

  1249.     .priv_data_size = sizeof(TiffContext),

  1250.     .init           = tiff_init,

  1251.     .close          = tiff_end,

  1252.     .decode         = decode_frame,

  1253.     .capabilities   = CODEC_CAP_DR1,

  1254.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1255. };