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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 "config.h"

  28. #if CONFIG_ZLIB

  29. #include <zlib.h>

  30. #endif

  31. 

  32. #include "libavutil/attributes.h"

  33. #include "libavutil/avstring.h"

  34. #include "libavutil/intreadwrite.h"

  35. #include "libavutil/imgutils.h"

  36. #include "avcodec.h"

  37. #include "bytestream.h"

  38. #include "faxcompr.h"

  39. #include "internal.h"

  40. #include "lzw.h"

  41. #include "mathops.h"

  42. #include "tiff.h"

  43. #include "tiff_data.h"

  44. #include "thread.h"

  45. 

  46. typedef struct TiffContext {

  47.     AVCodecContext *avctx;

  48.     GetByteContext gb;

  49. 

  50.     int width, height;

  51.     unsigned int bpp, bppcount;

  52.     uint32_t palette[256];

  53.     int palette_is_set;

  54.     int le;

  55.     enum TiffCompr compr;

  56.     int invert;

  57.     int planar;

  58.     int fax_opts;

  59.     int predictor;

  60.     int fill_order;

  61. 

  62.     int strips, rps, sstype;

  63.     int sot;

  64.     int stripsizesoff, stripsize, stripoff, strippos;

  65.     LZWState *lzw;

  66. 

  67.     uint8_t *deinvert_buf;

  68.     int deinvert_buf_size;

  69. 

  70.     int geotag_count;

  71.     TiffGeoTag *geotags;

  72. } TiffContext;

  73. 

  74. static void free_geotags(TiffContext *const s)

  75. {

  76.     int i;

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

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

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

  80.     }

  81.     av_freep(&s->geotags);

  82. }

  83. 

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

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

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

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

  88. 

  89. static const char *get_geokey_name(int key)

  90. {

  91.     RET_GEOKEY(VERT, vert, name);

  92.     RET_GEOKEY(PROJ, proj, name);

  93.     RET_GEOKEY(GEOG, geog, name);

  94.     RET_GEOKEY(CONF, conf, name);

  95. 

  96.     return NULL;

  97. }

  98. 

  99. static int get_geokey_type(int key)

  100. {

  101.     RET_GEOKEY(VERT, vert, type);

  102.     RET_GEOKEY(PROJ, proj, type);

  103.     RET_GEOKEY(GEOG, geog, type);

  104.     RET_GEOKEY(CONF, conf, type);

  105. 

  106.     return AVERROR_INVALIDDATA;

  107. }

  108. 

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

  110. {

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

  112. }

  113. 

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

  115. {

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

  117.     if(r)

  118.         return r->name;

  119. 

  120.     return NULL;

  121. }

  122. 

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

  124. {

  125.     char *ap;

  126. 

  127.     if (val == TIFF_GEO_KEY_UNDEFINED)

  128.         return av_strdup("undefined");

  129.     if (val == TIFF_GEO_KEY_USER_DEFINED)

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

  131. 

  132. #define RET_GEOKEY_VAL(TYPE, array)\

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

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

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

  136. 

  137.     switch (key) {

  138.     case TIFF_GT_MODEL_TYPE_GEOKEY:

  139.         RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);

  140.         break;

  141.     case TIFF_GT_RASTER_TYPE_GEOKEY:

  142.         RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);

  143.         break;

  144.     case TIFF_GEOG_LINEAR_UNITS_GEOKEY:

  145.     case TIFF_PROJ_LINEAR_UNITS_GEOKEY:

  146.     case TIFF_VERTICAL_UNITS_GEOKEY:

  147.         RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);

  148.         break;

  149.     case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:

  150.     case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:

  151.         RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);

  152.         break;

  153.     case TIFF_GEOGRAPHIC_TYPE_GEOKEY:

  154.         RET_GEOKEY_VAL(GCS_TYPE, gcs_type);

  155.         RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);

  156.         break;

  157.     case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:

  158.         RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);

  159.         RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);

  160.         break;

  161.     case TIFF_GEOG_ELLIPSOID_GEOKEY:

  162.         RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);

  163.         break;

  164.     case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:

  165.         RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);

  166.         break;

  167.     case TIFF_PROJECTED_CS_TYPE_GEOKEY:

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

  169.         if(ap) return ap;

  170.         break;

  171.     case TIFF_PROJECTION_GEOKEY:

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

  173.         if(ap) return ap;

  174.         break;

  175.     case TIFF_PROJ_COORD_TRANS_GEOKEY:

  176.         RET_GEOKEY_VAL(COORD_TRANS, coord_trans);

  177.         break;

  178.     case TIFF_VERTICAL_CS_TYPE_GEOKEY:

  179.         RET_GEOKEY_VAL(VERT_CS, vert_cs);

  180.         RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);

  181.         break;

  182. 

  183.     }

  184. 

  185.     ap = av_malloc(14);

  186.     if (ap)

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

  188.     return ap;

  189. }

  190. 

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

  192. {

  193.     int i;

  194.     char *ap, *ap0;

  195.     uint64_t component_len;

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

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

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

  199.         return NULL;

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

  201.     if (!ap)

  202.         return NULL;

  203.     ap0   = ap;

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

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

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

  207.         if(l >= component_len) {

  208.             av_free(ap0);

  209.             return NULL;

  210.         }

  211.         ap += l;

  212.     }

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

  214.     return ap0;

  215. }

  216. 

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

  218.                         const char *name, const char *sep, TiffContext *s, AVFrame *frame)

  219. {

  220.     switch(type) {

  221.     case TIFF_DOUBLE: return ff_tadd_doubles_metadata(count, name, sep, &s->gb, s->le, avpriv_frame_get_metadatap(frame));

  222.     case TIFF_SHORT : return ff_tadd_shorts_metadata(count, name, sep, &s->gb, s->le, avpriv_frame_get_metadatap(frame));

  223.     case TIFF_STRING: return ff_tadd_string_metadata(count, name, &s->gb, s->le, avpriv_frame_get_metadatap(frame));

  224.     default         : return AVERROR_INVALIDDATA;

  225.     };

  226. }

  227. 

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

  229.                                              int usePtr, const uint8_t *src,

  230.                                              uint8_t c, int width, int offset)

  231. {

  232.     switch (bpp) {

  233.     case 1:

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

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

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

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

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

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

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

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

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

  243.         }

  244.         break;

  245.     case 2:

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

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

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

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

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

  251.         }

  252.         break;

  253.     case 4:

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

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

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

  257.         }

  258.         break;

  259.     default:

  260.         if (usePtr) {

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

  262.         } else {

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

  264.         }

  265.     }

  266. }

  267. 

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

  269. {

  270.     int i;

  271. 

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

  273.     if (!s->deinvert_buf)

  274.         return AVERROR(ENOMEM);

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

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

  277. 

  278.     return 0;

  279. }

  280. 

  281. #if CONFIG_ZLIB

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

  283.                            int size)

  284. {

  285.     z_stream zstream = { 0 };

  286.     int zret;

  287. 

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

  289.     zstream.avail_in  = size;

  290.     zstream.next_out  = dst;

  291.     zstream.avail_out = *len;

  292.     zret              = inflateInit(&zstream);

  293.     if (zret != Z_OK) {

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

  295.         return zret;

  296.     }

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

  298.     inflateEnd(&zstream);

  299.     *len = zstream.total_out;

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

  301. }

  302. 

  303. static int tiff_unpack_zlib(TiffContext *s, uint8_t *dst, int stride,

  304.                             const uint8_t *src, int size,

  305.                             int width, int lines)

  306. {

  307.     uint8_t *zbuf;

  308.     unsigned long outlen;

  309.     int ret, line;

  310.     outlen = width * lines;

  311.     zbuf   = av_malloc(outlen);

  312.     if (!zbuf)

  313.         return AVERROR(ENOMEM);

  314.     if (s->fill_order) {

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

  316.             av_free(zbuf);

  317.             return ret;

  318.         }

  319.         src = s->deinvert_buf;

  320.     }

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

  322.     if (ret != Z_OK) {

  323.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  326.         av_free(zbuf);

  327.         return AVERROR_UNKNOWN;

  328.     }

  329.     src = zbuf;

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

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

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

  333.         } else {

  334.             memcpy(dst, src, width);

  335.         }

  336.         dst += stride;

  337.         src += width;

  338.     }

  339.     av_free(zbuf);

  340.     return 0;

  341. }

  342. #endif

  343. 

  344. 

  345. static int tiff_unpack_fax(TiffContext *s, uint8_t *dst, int stride,

  346.                            const uint8_t *src, int size, int width, int lines)

  347. {

  348.     int i, ret = 0;

  349.     int line;

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

  351.                               FF_INPUT_BUFFER_PADDING_SIZE);

  352. 

  353.     if (!src2) {

  354.         av_log(s->avctx, AV_LOG_ERROR,

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

  356.         return AVERROR(ENOMEM);

  357.     }

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

  359.         avpriv_request_sample(s->avctx, "Uncompressed fax mode");

  360.         av_free(src2);

  361.         return AVERROR_PATCHWELCOME;

  362.     }

  363.     if (!s->fill_order) {

  364.         memcpy(src2, src, size);

  365.     } else {

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

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

  368.     }

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

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

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

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

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

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

  375.             dst += stride;

  376.         }

  377.     av_free(src2);

  378.     return ret;

  379. }

  380. 

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

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

  383. {

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

  385.     const uint8_t *ssrc = src;

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

  387. 

  388.     if (s->planar)

  389.         width /= s->bppcount;

  390. 

  391.     if (size <= 0)

  392.         return AVERROR_INVALIDDATA;

  393. 

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

  395. #if CONFIG_ZLIB

  396.         return tiff_unpack_zlib(s, dst, stride, src, size, width, lines);

  397. #else

  398.         av_log(s->avctx, AV_LOG_ERROR,

  399.                "zlib support not enabled, "

  400.                "deflate compression not supported\n");

  401.         return AVERROR(ENOSYS);

  402. #endif

  403.     }

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

  405.         if (s->fill_order) {

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

  407.                 return ret;

  408.             ssrc = src = s->deinvert_buf;

  409.         }

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

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

  412.         }

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

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

  415.             return ret;

  416.         }

  417.     }

  418.     if (s->compr == TIFF_CCITT_RLE ||

  419.         s->compr == TIFF_G3        ||

  420.         s->compr == TIFF_G4) {

  421.         return tiff_unpack_fax(s, dst, stride, src, size, width, lines);

  422.     }

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

  424.         if (src - ssrc > size) {

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

  426.             return AVERROR_INVALIDDATA;

  427.         }

  428.         switch (s->compr) {

  429.         case TIFF_RAW:

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

  431.                 return AVERROR_INVALIDDATA;

  432.             if (!s->fill_order) {

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

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

  435.             } else {

  436.                 int i;

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

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

  439.             }

  440.             src += width;

  441.             break;

  442.         case TIFF_PACKBITS:

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

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

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

  446.                     return AVERROR_INVALIDDATA;

  447.                 }

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

  449.                 if (code >= 0) {

  450.                     code++;

  451.                     if (pixels + code > width ||

  452.                         ssrc + size - src < code) {

  453.                         av_log(s->avctx, AV_LOG_ERROR,

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

  455.                         return AVERROR_INVALIDDATA;

  456.                     }

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

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

  459.                     src    += code;

  460.                     pixels += code;

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

  462.                     code = (-code) + 1;

  463.                     if (pixels + code > width) {

  464.                         av_log(s->avctx, AV_LOG_ERROR,

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

  466.                         return AVERROR_INVALIDDATA;

  467.                     }

  468.                     c = *src++;

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

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

  471.                     pixels += code;

  472.                 }

  473.             }

  474.             if (s->fill_order) {

  475.                 int i;

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

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

  478.             }

  479.             break;

  480.         case TIFF_LZW:

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

  482.             if (pixels < width) {

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

  484.                        pixels, width);

  485.                 return AVERROR_INVALIDDATA;

  486.             }

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

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

  489.             break;

  490.         }

  491.         dst += stride;

  492.     }

  493.     return 0;

  494. }

  495. 

  496. static int init_image(TiffContext *s, ThreadFrame *frame)

  497. {

  498.     int i, ret;

  499.     uint32_t *pal;

  500. 

  501.     switch (s->planar * 1000 + s->bpp * 10 + s->bppcount) {

  502.     case 11:

  503.         if (!s->palette_is_set) {

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

  505.             break;

  506.         }

  507.     case 21:

  508.     case 41:

  509.     case 81:

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

  511.         break;

  512.     case 243:

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

  514.         break;

  515.     case 161:

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

  517.         break;

  518.     case 162:

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

  520.         break;

  521.     case 324:

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

  523.         break;

  524.     case 483:

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

  526.         break;

  527.     case 644:

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

  529.         break;

  530.     case 1243:

  531.         s->avctx->pix_fmt = AV_PIX_FMT_GBRP;

  532.         break;

  533.     case 1324:

  534.         s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;

  535.         break;

  536.     case 1483:

  537.         s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GBRP16LE : AV_PIX_FMT_GBRP16BE;

  538.         break;

  539.     case 1644:

  540.         s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GBRAP16LE : AV_PIX_FMT_GBRAP16BE;

  541.         break;

  542.     default:

  543.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  546.         return AVERROR_INVALIDDATA;

  547.     }

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

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

  550.             return ret;

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

  552.     }

  553.     if ((ret = ff_thread_get_buffer(s->avctx, frame, 0)) < 0)

  554.         return ret;

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

  556.         if (s->palette_is_set) {

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

  558.         } else {

  559.             /* make default grayscale pal */

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

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

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

  563.         }

  564.     }

  565.     return 0;

  566. }

  567. 

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

  569. {

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

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

  572.     int ret;

  573.     uint32_t *pal;

  574.     double *dp;

  575. 

  576.     ret = ff_tread_tag(&s->gb, s->le, &tag, &type, &count, &start);

  577.     if (ret < 0) {

  578.         goto end;

  579.     }

  580. 

  581.     if (count == 1) {

  582.         switch (type) {

  583.         case TIFF_BYTE:

  584.         case TIFF_SHORT:

  585.             value = ff_tget(&s->gb, type, s->le);

  586.             break;

  587.         case TIFF_LONG:

  588.             off   = ff_tget_long(&s->gb, s->le);

  589.             value = off;

  590.             break;

  591.         case TIFF_STRING:

  592.             if (count <= 4) {

  593.                 break;

  594.             }

  595.         default:

  596.             off   = bytestream2_tell(&s->gb);

  597.             value = UINT_MAX;

  598.         }

  599.     } else {

  600.         off   = bytestream2_tell(&s->gb);

  601.     }

  602. 

  603.     switch (tag) {

  604.     case TIFF_WIDTH:

  605.         s->width = value;

  606.         break;

  607.     case TIFF_HEIGHT:

  608.         s->height = value;

  609.         break;

  610.     case TIFF_BPP:

  611.         s->bppcount = count;

  612.         if (count > 4) {

  613.             av_log(s->avctx, AV_LOG_ERROR,

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

  615.                    s->bpp, count);

  616.             return AVERROR_INVALIDDATA;

  617.         }

  618.         if (count == 1)

  619.             s->bpp = value;

  620.         else {

  621.             switch (type) {

  622.             case TIFF_BYTE:

  623.             case TIFF_SHORT:

  624.             case TIFF_LONG:

  625.                 s->bpp = 0;

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

  627.                     return AVERROR_INVALIDDATA;

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

  629.                     s->bpp += ff_tget(&s->gb, type, s->le);

  630.                 break;

  631.             default:

  632.                 s->bpp = -1;

  633.             }

  634.         }

  635.         break;

  636.     case TIFF_SAMPLES_PER_PIXEL:

  637.         if (count != 1) {

  638.             av_log(s->avctx, AV_LOG_ERROR,

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

  640.             return AVERROR_INVALIDDATA;

  641.         }

  642.         if (value > 4U) {

  643.             av_log(s->avctx, AV_LOG_ERROR,

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

  645.             return AVERROR_INVALIDDATA;

  646.         }

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

  648.             s->bpp *= value;

  649.         s->bppcount = value;

  650.         break;

  651.     case TIFF_COMPR:

  652.         s->compr     = value;

  653.         s->predictor = 0;

  654.         switch (s->compr) {

  655.         case TIFF_RAW:

  656.         case TIFF_PACKBITS:

  657.         case TIFF_LZW:

  658.         case TIFF_CCITT_RLE:

  659.             break;

  660.         case TIFF_G3:

  661.         case TIFF_G4:

  662.             s->fax_opts = 0;

  663.             break;

  664.         case TIFF_DEFLATE:

  665.         case TIFF_ADOBE_DEFLATE:

  666. #if CONFIG_ZLIB

  667.             break;

  668. #else

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

  670.             return AVERROR(ENOSYS);

  671. #endif

  672.         case TIFF_JPEG:

  673.         case TIFF_NEWJPEG:

  674.             avpriv_report_missing_feature(s->avctx, "JPEG compression");

  675.             return AVERROR_PATCHWELCOME;

  676.         default:

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

  678.                    s->compr);

  679.             return AVERROR_INVALIDDATA;

  680.         }

  681.         break;

  682.     case TIFF_ROWSPERSTRIP:

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

  684.             value = s->height;

  685.         if (value < 1) {

  686.             av_log(s->avctx, AV_LOG_ERROR,

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

  688.             return AVERROR_INVALIDDATA;

  689.         }

  690.         s->rps = value;

  691.         break;

  692.     case TIFF_STRIP_OFFS:

  693.         if (count == 1) {

  694.             s->strippos  = 0;

  695.             s->stripoff  = value;

  696.         } else

  697.             s->strippos = off;

  698.         s->strips = count;

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

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

  701.         s->sot = type;

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

  703.             av_log(s->avctx, AV_LOG_ERROR,

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

  705.             return AVERROR_INVALIDDATA;

  706.         }

  707.         break;

  708.     case TIFF_STRIP_SIZE:

  709.         if (count == 1) {

  710.             s->stripsizesoff = 0;

  711.             s->stripsize  = value;

  712.             s->strips     = 1;

  713.         } else {

  714.             s->stripsizesoff = off;

  715.         }

  716.         s->strips = count;

  717.         s->sstype = type;

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

  719.             av_log(s->avctx, AV_LOG_ERROR,

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

  721.             return AVERROR_INVALIDDATA;

  722.         }

  723.         break;

  724.     case TIFF_TILE_BYTE_COUNTS:

  725.     case TIFF_TILE_LENGTH:

  726.     case TIFF_TILE_OFFSETS:

  727.     case TIFF_TILE_WIDTH:

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

  729.         return AVERROR_PATCHWELCOME;

  730.         break;

  731.     case TIFF_PREDICTOR:

  732.         s->predictor = value;

  733.         break;

  734.     case TIFF_INVERT:

  735.         switch (value) {

  736.         case 0:

  737.             s->invert = 1;

  738.             break;

  739.         case 1:

  740.             s->invert = 0;

  741.             break;

  742.         case 2:

  743.         case 3:

  744.             break;

  745.         default:

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

  747.                    value);

  748.             return AVERROR_INVALIDDATA;

  749.         }

  750.         break;

  751.     case TIFF_FILL_ORDER:

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

  753.             av_log(s->avctx, AV_LOG_ERROR,

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

  755.             value = 1;

  756.         }

  757.         s->fill_order = value - 1;

  758.         break;

  759.     case TIFF_PAL:

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

  761.         off = type_sizes[type];

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

  763.             return AVERROR_INVALIDDATA;

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

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

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

  767.                 if (k == 2)

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

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

  770.                 pal[i] |= j;

  771.             }

  772.         }

  773.         s->palette_is_set = 1;

  774.         break;

  775.     case TIFF_PLANAR:

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

  777.         break;

  778.     case TIFF_T4OPTIONS:

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

  780.             s->fax_opts = value;

  781.         break;

  782.     case TIFF_T6OPTIONS:

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

  784.             s->fax_opts = value;

  785.         break;

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

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

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

  789.         goto end;\

  790.     }

  791.     case TIFF_MODEL_PIXEL_SCALE:

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

  793.         break;

  794.     case TIFF_MODEL_TRANSFORMATION:

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

  796.         break;

  797.     case TIFF_MODEL_TIEPOINT:

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

  799.         break;

  800.     case TIFF_GEO_KEY_DIRECTORY:

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

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

  803.         s->geotag_count   = ff_tget_short(&s->gb, s->le);

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

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

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

  807.         }

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

  809.             s->geotag_count = 0;

  810.             return -1;

  811.         }

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

  813.         if (!s->geotags) {

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

  815.             s->geotag_count = 0;

  816.             goto end;

  817.         }

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

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

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

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

  822. 

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

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

  825.             else

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

  827.         }

  828.         break;

  829.     case TIFF_GEO_DOUBLE_PARAMS:

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

  831.             return AVERROR_INVALIDDATA;

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

  833.             return AVERROR_INVALIDDATA;

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

  835.         if (!dp) {

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

  837.             goto end;

  838.         }

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

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

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

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

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

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

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

  846.                 } else {

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

  848.                     if (!ap) {

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

  850.                         av_freep(&dp);

  851.                         return AVERROR(ENOMEM);

  852.                     }

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

  854.                 }

  855.             }

  856.         }

  857.         av_freep(&dp);

  858.         break;

  859.     case TIFF_GEO_ASCII_PARAMS:

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

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

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

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

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

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

  866.                 } else {

  867.                     char *ap;

  868. 

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

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

  871.                         return AVERROR_INVALIDDATA;

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

  873.                     if (!ap) {

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

  875.                         return AVERROR(ENOMEM);

  876.                     }

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

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

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

  880.                 }

  881.             }

  882.         }

  883.         break;

  884.     case TIFF_ARTIST:

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

  886.         break;

  887.     case TIFF_COPYRIGHT:

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

  889.         break;

  890.     case TIFF_DATE:

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

  892.         break;

  893.     case TIFF_DOCUMENT_NAME:

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

  895.         break;

  896.     case TIFF_HOST_COMPUTER:

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

  898.         break;

  899.     case TIFF_IMAGE_DESCRIPTION:

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

  901.         break;

  902.     case TIFF_MAKE:

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

  904.         break;

  905.     case TIFF_MODEL:

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

  907.         break;

  908.     case TIFF_PAGE_NAME:

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

  910.         break;

  911.     case TIFF_PAGE_NUMBER:

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

  913.         break;

  914.     case TIFF_SOFTWARE_NAME:

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

  916.         break;

  917.     default:

  918.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  919.             av_log(s->avctx, AV_LOG_ERROR,

  920.                    "Unknown or unsupported tag %d/0X%0X\n",

  921.                    tag, tag);

  922.             return AVERROR_INVALIDDATA;

  923.         }

  924.     }

  925. end:

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

  927.     return 0;

  928. }

  929. 

  930. static int decode_frame(AVCodecContext *avctx,

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

  932. {

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

  934.     AVFrame *const p = data;

  935.     ThreadFrame frame = { .f = data };

  936.     unsigned off;

  937.     int le, ret, plane, planes;

  938.     int i, j, entries, stride;

  939.     unsigned soff, ssize;

  940.     uint8_t *dst;

  941.     GetByteContext stripsizes;

  942.     GetByteContext stripdata;

  943. 

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

  945. 

  946.     // parse image header

  947.     if ((ret = ff_tdecode_header(&s->gb, &le, &off))) {

  948.         av_log(avctx, AV_LOG_ERROR, "Invalid TIFF header\n");

  949.         return ret;

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

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

  952.         return AVERROR_INVALIDDATA;

  953.     }

  954.     s->le         = le;

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

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

  957.     s->invert     = 0;

  958.     s->compr      = TIFF_RAW;

  959.     s->fill_order = 0;

  960.     free_geotags(s);

  961. 

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

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

  964.     /* parse image file directory */

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

  966.     entries = ff_tget_short(&s->gb, le);

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

  968.         return AVERROR_INVALIDDATA;

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

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

  971.             return ret;

  972.     }

  973. 

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

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

  976.         if (!keyname) {

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

  978.             continue;

  979.         }

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

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

  982.             continue;

  983.         }

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

  985.         if (ret<0) {

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

  987.             return ret;

  988.         }

  989.     }

  990. 

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

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

  993.         return AVERROR_INVALIDDATA;

  994.     }

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

  996.     if ((ret = init_image(s, &frame)) < 0)

  997.         return ret;

  998. 

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

  1000.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1001.         s->stripsize = avpkt->size - s->stripoff;

  1002.     }

  1003. 

  1004.     if (s->stripsizesoff) {

  1005.         if (s->stripsizesoff >= (unsigned)avpkt->size)

  1006.             return AVERROR_INVALIDDATA;

  1007.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff, avpkt->size - s->stripsizesoff);

  1008.     }

  1009.     if (s->strippos) {

  1010.         if (s->strippos >= (unsigned)avpkt->size)

  1011.             return AVERROR_INVALIDDATA;

  1012.         bytestream2_init(&stripdata, avpkt->data + s->strippos, avpkt->size - s->strippos);

  1013.     }

  1014. 

  1015.     if (s->rps <= 0) {

  1016.         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);

  1017.         return AVERROR_INVALIDDATA;

  1018.     }

  1019. 

  1020.     planes = s->planar ? s->bppcount : 1;

  1021.     for (plane = 0; plane < planes; plane++) {

  1022.         stride = p->linesize[plane];

  1023.         dst    = p->data[plane];

  1024.     for (i = 0; i < s->height; i += s->rps) {

  1025.         if (s->stripsizesoff)

  1026.             ssize = ff_tget(&stripsizes, s->sstype, s->le);

  1027.         else

  1028.             ssize = s->stripsize;

  1029. 

  1030.         if (s->strippos)

  1031.             soff = ff_tget(&stripdata, s->sot, s->le);

  1032.         else

  1033.             soff = s->stripoff;

  1034. 

  1035.         if (soff > avpkt->size || ssize > avpkt->size - soff) {

  1036.             av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1037.             return AVERROR_INVALIDDATA;

  1038.         }

  1039.         if ((ret = tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize,

  1040.                                      FFMIN(s->rps, s->height - i))) < 0) {

  1041.             if (avctx->err_recognition & AV_EF_EXPLODE)

  1042.                 return ret;

  1043.             break;

  1044.         }

  1045.         dst += s->rps * stride;

  1046.     }

  1047.     if (s->predictor == 2) {

  1048.         dst   = p->data[plane];

  1049.         soff  = s->bpp >> 3;

  1050.         if (s->planar)

  1051.             soff  = FFMAX(soff / s->bppcount, 1);

  1052.         ssize = s->width * soff;

  1053.         if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1054.             s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||

  1055.             s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||

  1056.             s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {

  1057.             for (i = 0; i < s->height; i++) {

  1058.                 for (j = soff; j < ssize; j += 2)

  1059.                     AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1060.                 dst += stride;

  1061.             }

  1062.         } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1063.                    s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||

  1064.                    s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||

  1065.                    s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {

  1066.             for (i = 0; i < s->height; i++) {

  1067.                 for (j = soff; j < ssize; j += 2)

  1068.                     AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1069.                 dst += stride;

  1070.             }

  1071.         } else {

  1072.             for (i = 0; i < s->height; i++) {

  1073.                 for (j = soff; j < ssize; j++)

  1074.                     dst[j] += dst[j - soff];

  1075.                 dst += stride;

  1076.             }

  1077.         }

  1078.     }

  1079. 

  1080.     if (s->invert) {

  1081.         dst = p->data[plane];

  1082.         for (i = 0; i < s->height; i++) {

  1083.             for (j = 0; j < p->linesize[plane]; j++)

  1084.                 dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];

  1085.             dst += p->linesize[plane];

  1086.         }

  1087.     }

  1088.     }

  1089. 

  1090.     if (s->planar && s->bppcount > 2) {

  1091.         FFSWAP(uint8_t*, p->data[0],     p->data[2]);

  1092.         FFSWAP(int,      p->linesize[0], p->linesize[2]);

  1093.         FFSWAP(uint8_t*, p->data[0],     p->data[1]);

  1094.         FFSWAP(int,      p->linesize[0], p->linesize[1]);

  1095.     }

  1096. 

  1097.     *got_frame = 1;

  1098. 

  1099.     return avpkt->size;

  1100. }

  1101. 

  1102. static av_cold int tiff_init(AVCodecContext *avctx)

  1103. {

  1104.     TiffContext *s = avctx->priv_data;

  1105. 

  1106.     s->width  = 0;

  1107.     s->height = 0;

  1108.     s->avctx  = avctx;

  1109.     ff_lzw_decode_open(&s->lzw);

  1110.     ff_ccitt_unpack_init();

  1111. 

  1112.     return 0;

  1113. }

  1114. 

  1115. static av_cold int tiff_end(AVCodecContext *avctx)

  1116. {

  1117.     TiffContext *const s = avctx->priv_data;

  1118. 

  1119.     free_geotags(s);

  1120. 

  1121.     ff_lzw_decode_close(&s->lzw);

  1122.     av_freep(&s->deinvert_buf);

  1123.     return 0;

  1124. }

  1125. 

  1126. AVCodec ff_tiff_decoder = {

  1127.     .name           = "tiff",

  1128.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1129.     .type           = AVMEDIA_TYPE_VIDEO,

  1130.     .id             = AV_CODEC_ID_TIFF,

  1131.     .priv_data_size = sizeof(TiffContext),

  1132.     .init           = tiff_init,

  1133.     .close          = tiff_end,

  1134.     .decode         = decode_frame,

  1135.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(tiff_init),

  1136.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,

  1137. };