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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.     uint32_t res[4];

  62. 

  63.     int strips, rps, sstype;

  64.     int sot;

  65.     int stripsizesoff, stripsize, stripoff, strippos;

  66.     LZWState *lzw;

  67. 

  68.     uint8_t *deinvert_buf;

  69.     int deinvert_buf_size;

  70. 

  71.     int geotag_count;

  72.     TiffGeoTag *geotags;

  73. } TiffContext;

  74. 

  75. static void free_geotags(TiffContext *const s)

  76. {

  77.     int i;

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

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

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

  81.     }

  82.     av_freep(&s->geotags);

  83.     s->geotag_count = 0;

  84. }

  85. 

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

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

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

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

  90. 

  91. static const char *get_geokey_name(int key)

  92. {

  93.     RET_GEOKEY(VERT, vert, name);

  94.     RET_GEOKEY(PROJ, proj, name);

  95.     RET_GEOKEY(GEOG, geog, name);

  96.     RET_GEOKEY(CONF, conf, name);

  97. 

  98.     return NULL;

  99. }

  100. 

  101. static int get_geokey_type(int key)

  102. {

  103.     RET_GEOKEY(VERT, vert, type);

  104.     RET_GEOKEY(PROJ, proj, type);

  105.     RET_GEOKEY(GEOG, geog, type);

  106.     RET_GEOKEY(CONF, conf, type);

  107. 

  108.     return AVERROR_INVALIDDATA;

  109. }

  110. 

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

  112. {

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

  114. }

  115. 

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

  117. {

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

  119.     if(r)

  120.         return r->name;

  121. 

  122.     return NULL;

  123. }

  124. 

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

  126. {

  127.     char *ap;

  128. 

  129.     if (val == TIFF_GEO_KEY_UNDEFINED)

  130.         return av_strdup("undefined");

  131.     if (val == TIFF_GEO_KEY_USER_DEFINED)

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

  133. 

  134. #define RET_GEOKEY_VAL(TYPE, array)\

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

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

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

  138. 

  139.     switch (key) {

  140.     case TIFF_GT_MODEL_TYPE_GEOKEY:

  141.         RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);

  142.         break;

  143.     case TIFF_GT_RASTER_TYPE_GEOKEY:

  144.         RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);

  145.         break;

  146.     case TIFF_GEOG_LINEAR_UNITS_GEOKEY:

  147.     case TIFF_PROJ_LINEAR_UNITS_GEOKEY:

  148.     case TIFF_VERTICAL_UNITS_GEOKEY:

  149.         RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);

  150.         break;

  151.     case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:

  152.     case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:

  153.         RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);

  154.         break;

  155.     case TIFF_GEOGRAPHIC_TYPE_GEOKEY:

  156.         RET_GEOKEY_VAL(GCS_TYPE, gcs_type);

  157.         RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);

  158.         break;

  159.     case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:

  160.         RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);

  161.         RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);

  162.         break;

  163.     case TIFF_GEOG_ELLIPSOID_GEOKEY:

  164.         RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);

  165.         break;

  166.     case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:

  167.         RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);

  168.         break;

  169.     case TIFF_PROJECTED_CS_TYPE_GEOKEY:

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

  171.         if(ap) return ap;

  172.         break;

  173.     case TIFF_PROJECTION_GEOKEY:

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

  175.         if(ap) return ap;

  176.         break;

  177.     case TIFF_PROJ_COORD_TRANS_GEOKEY:

  178.         RET_GEOKEY_VAL(COORD_TRANS, coord_trans);

  179.         break;

  180.     case TIFF_VERTICAL_CS_TYPE_GEOKEY:

  181.         RET_GEOKEY_VAL(VERT_CS, vert_cs);

  182.         RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);

  183.         break;

  184. 

  185.     }

  186. 

  187.     ap = av_malloc(14);

  188.     if (ap)

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

  190.     return ap;

  191. }

  192. 

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

  194. {

  195.     int i;

  196.     char *ap, *ap0;

  197.     uint64_t component_len;

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

  199.     component_len = 24LL + strlen(sep);

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

  201.         return NULL;

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

  203.     if (!ap)

  204.         return NULL;

  205.     ap0   = ap;

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

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

  208.         unsigned l = snprintf(ap, component_len, "%.15g%s", dp[i], sep);

  209.         if(l >= component_len) {

  210.             av_free(ap0);

  211.             return NULL;

  212.         }

  213.         ap += l;

  214.     }

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

  216.     return ap0;

  217. }

  218. 

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

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

  221. {

  222.     switch(type) {

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

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

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

  226.     default         : return AVERROR_INVALIDDATA;

  227.     };

  228. }

  229. 

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

  231.                                              int usePtr, const uint8_t *src,

  232.                                              uint8_t c, int width, int offset)

  233. {

  234.     switch (bpp) {

  235.     case 1:

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

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

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

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

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

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

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

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

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

  245.         }

  246.         break;

  247.     case 2:

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

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

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

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

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

  253.         }

  254.         break;

  255.     case 4:

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

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

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

  259.         }

  260.         break;

  261.     default:

  262.         if (usePtr) {

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

  264.         } else {

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

  266.         }

  267.     }

  268. }

  269. 

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

  271. {

  272.     int i;

  273. 

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

  275.     if (!s->deinvert_buf)

  276.         return AVERROR(ENOMEM);

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

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

  279. 

  280.     return 0;

  281. }

  282. 

  283. #if CONFIG_ZLIB

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

  285.                            int size)

  286. {

  287.     z_stream zstream = { 0 };

  288.     int zret;

  289. 

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

  291.     zstream.avail_in  = size;

  292.     zstream.next_out  = dst;

  293.     zstream.avail_out = *len;

  294.     zret              = inflateInit(&zstream);

  295.     if (zret != Z_OK) {

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

  297.         return zret;

  298.     }

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

  300.     inflateEnd(&zstream);

  301.     *len = zstream.total_out;

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

  303. }

  304. 

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

  306.                             const uint8_t *src, int size,

  307.                             int width, int lines)

  308. {

  309.     uint8_t *zbuf;

  310.     unsigned long outlen;

  311.     int ret, line;

  312.     outlen = width * lines;

  313.     zbuf   = av_malloc(outlen);

  314.     if (!zbuf)

  315.         return AVERROR(ENOMEM);

  316.     if (s->fill_order) {

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

  318.             av_free(zbuf);

  319.             return ret;

  320.         }

  321.         src = s->deinvert_buf;

  322.     }

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

  324.     if (ret != Z_OK) {

  325.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  328.         av_free(zbuf);

  329.         return AVERROR_UNKNOWN;

  330.     }

  331.     src = zbuf;

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

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

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

  335.         } else {

  336.             memcpy(dst, src, width);

  337.         }

  338.         dst += stride;

  339.         src += width;

  340.     }

  341.     av_free(zbuf);

  342.     return 0;

  343. }

  344. #endif

  345. 

  346. 

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

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

  349. {

  350.     int i, ret = 0;

  351.     int line;

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

  353.                               FF_INPUT_BUFFER_PADDING_SIZE);

  354. 

  355.     if (!src2) {

  356.         av_log(s->avctx, AV_LOG_ERROR,

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

  358.         return AVERROR(ENOMEM);

  359.     }

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

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

  362.         av_free(src2);

  363.         return AVERROR_PATCHWELCOME;

  364.     }

  365.     if (!s->fill_order) {

  366.         memcpy(src2, src, size);

  367.     } else {

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

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

  370.     }

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

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

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

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

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

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

  377.             dst += stride;

  378.         }

  379.     av_free(src2);

  380.     return ret;

  381. }

  382. 

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

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

  385. {

  386.     PutByteContext pb;

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

  388.     const uint8_t *ssrc = src;

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

  390. 

  391.     if (s->planar)

  392.         width /= s->bppcount;

  393. 

  394.     if (size <= 0)

  395.         return AVERROR_INVALIDDATA;

  396. 

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

  398. #if CONFIG_ZLIB

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

  400. #else

  401.         av_log(s->avctx, AV_LOG_ERROR,

  402.                "zlib support not enabled, "

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

  404.         return AVERROR(ENOSYS);

  405. #endif

  406.     }

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

  408.         if (s->fill_order) {

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

  410.                 return ret;

  411.             ssrc = src = s->deinvert_buf;

  412.         }

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

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

  415.         }

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

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

  418.             return ret;

  419.         }

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

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

  422.             if (pixels < width) {

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

  424.                        pixels, width);

  425.                 return AVERROR_INVALIDDATA;

  426.             }

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

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

  429.             dst += stride;

  430.         }

  431.         return 0;

  432.     }

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

  434.         s->compr == TIFF_G3        ||

  435.         s->compr == TIFF_G4) {

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

  437.     }

  438. 

  439.     bytestream2_init(&s->gb, src, size);

  440.     bytestream2_init_writer(&pb, dst, stride * lines);

  441. 

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

  443.         if (src - ssrc > size) {

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

  445.             return AVERROR_INVALIDDATA;

  446.         }

  447. 

  448.         if (bytestream2_get_bytes_left(&s->gb) == 0 || bytestream2_get_eof(&pb))

  449.             break;

  450.         bytestream2_seek_p(&pb, stride * line, SEEK_SET);

  451.         switch (s->compr) {

  452.         case TIFF_RAW:

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

  454.                 return AVERROR_INVALIDDATA;

  455. 

  456.             if (!s->fill_order) {

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

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

  459.             } else {

  460.                 int i;

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

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

  463.             }

  464.             src += width;

  465.             break;

  466.         case TIFF_PACKBITS:

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

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

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

  470.                     return AVERROR_INVALIDDATA;

  471.                 }

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

  473.                 if (code >= 0) {

  474.                     code++;

  475.                     if (pixels + code > width ||

  476.                         ssrc + size - src < code) {

  477.                         av_log(s->avctx, AV_LOG_ERROR,

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

  479.                         return AVERROR_INVALIDDATA;

  480.                     }

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

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

  483.                     src    += code;

  484.                     pixels += code;

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

  486.                     code = (-code) + 1;

  487.                     if (pixels + code > width) {

  488.                         av_log(s->avctx, AV_LOG_ERROR,

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

  490.                         return AVERROR_INVALIDDATA;

  491.                     }

  492.                     c = *src++;

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

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

  495.                     pixels += code;

  496.                 }

  497.             }

  498.             if (s->fill_order) {

  499.                 int i;

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

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

  502.             }

  503.             break;

  504.         }

  505.         dst += stride;

  506.     }

  507.     return 0;

  508. }

  509. 

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

  511. {

  512.     int i, ret;

  513.     uint32_t *pal;

  514. 

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

  516.     case 11:

  517.         if (!s->palette_is_set) {

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

  519.             break;

  520.         }

  521.     case 21:

  522.     case 41:

  523.     case 81:

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

  525.         break;

  526.     case 243:

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

  528.         break;

  529.     case 161:

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

  531.         break;

  532.     case 162:

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

  534.         break;

  535.     case 324:

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

  537.         break;

  538.     case 483:

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

  540.         break;

  541.     case 644:

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

  543.         break;

  544.     case 1243:

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

  546.         break;

  547.     case 1324:

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

  549.         break;

  550.     case 1483:

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

  552.         break;

  553.     case 1644:

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

  555.         break;

  556.     default:

  557.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  560.         return AVERROR_INVALIDDATA;

  561.     }

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

  563.         ret = ff_set_dimensions(s->avctx, s->width, s->height);

  564.         if (ret < 0)

  565.             return ret;

  566.     }

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

  568.         return ret;

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

  570.         if (s->palette_is_set) {

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

  572.         } else {

  573.             /* make default grayscale pal */

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

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

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

  577.         }

  578.     }

  579.     return 0;

  580. }

  581. 

  582. static void set_sar(TiffContext *s, unsigned tag, unsigned num, unsigned den)

  583. {

  584.     int offset = tag == TIFF_YRES ? 2 : 0;

  585.     s->res[offset++] = num;

  586.     s->res[offset]   = den;

  587.     if (s->res[0] && s->res[1] && s->res[2] && s->res[3])

  588.         av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den,

  589.                   s->res[2] * (uint64_t)s->res[1], s->res[0] * (uint64_t)s->res[3], INT32_MAX);

  590. }

  591. 

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

  593. {

  594.     unsigned tag, type, count, off, value = 0, value2 = 0;

  595.     int i, start;

  596.     int j, k, pos;

  597.     int ret;

  598.     uint32_t *pal;

  599.     double *dp;

  600. 

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

  602.     if (ret < 0) {

  603.         goto end;

  604.     }

  605. 

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

  607.     if (count == 1) {

  608.         switch (type) {

  609.         case TIFF_BYTE:

  610.         case TIFF_SHORT:

  611.         case TIFF_LONG:

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

  613.             break;

  614.         case TIFF_RATIONAL:

  615.             value  = ff_tget(&s->gb, TIFF_LONG, s->le);

  616.             value2 = ff_tget(&s->gb, TIFF_LONG, s->le);

  617.             break;

  618.         case TIFF_STRING:

  619.             if (count <= 4) {

  620.                 break;

  621.             }

  622.         default:

  623.             value = UINT_MAX;

  624.         }

  625.     }

  626. 

  627.     switch (tag) {

  628.     case TIFF_WIDTH:

  629.         s->width = value;

  630.         break;

  631.     case TIFF_HEIGHT:

  632.         s->height = value;

  633.         break;

  634.     case TIFF_BPP:

  635.         s->bppcount = count;

  636.         if (count > 4) {

  637.             av_log(s->avctx, AV_LOG_ERROR,

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

  639.                    s->bpp, count);

  640.             return AVERROR_INVALIDDATA;

  641.         }

  642.         if (count == 1)

  643.             s->bpp = value;

  644.         else {

  645.             switch (type) {

  646.             case TIFF_BYTE:

  647.             case TIFF_SHORT:

  648.             case TIFF_LONG:

  649.                 s->bpp = 0;

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

  651.                     return AVERROR_INVALIDDATA;

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

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

  654.                 break;

  655.             default:

  656.                 s->bpp = -1;

  657.             }

  658.         }

  659.         break;

  660.     case TIFF_SAMPLES_PER_PIXEL:

  661.         if (count != 1) {

  662.             av_log(s->avctx, AV_LOG_ERROR,

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

  664.             return AVERROR_INVALIDDATA;

  665.         }

  666.         if (value > 4U) {

  667.             av_log(s->avctx, AV_LOG_ERROR,

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

  669.             return AVERROR_INVALIDDATA;

  670.         }

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

  672.             s->bpp *= value;

  673.         s->bppcount = value;

  674.         break;

  675.     case TIFF_COMPR:

  676.         s->compr     = value;

  677.         s->predictor = 0;

  678.         switch (s->compr) {

  679.         case TIFF_RAW:

  680.         case TIFF_PACKBITS:

  681.         case TIFF_LZW:

  682.         case TIFF_CCITT_RLE:

  683.             break;

  684.         case TIFF_G3:

  685.         case TIFF_G4:

  686.             s->fax_opts = 0;

  687.             break;

  688.         case TIFF_DEFLATE:

  689.         case TIFF_ADOBE_DEFLATE:

  690. #if CONFIG_ZLIB

  691.             break;

  692. #else

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

  694.             return AVERROR(ENOSYS);

  695. #endif

  696.         case TIFF_JPEG:

  697.         case TIFF_NEWJPEG:

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

  699.             return AVERROR_PATCHWELCOME;

  700.         default:

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

  702.                    s->compr);

  703.             return AVERROR_INVALIDDATA;

  704.         }

  705.         break;

  706.     case TIFF_ROWSPERSTRIP:

  707.         if (!value || (type == TIFF_LONG && value == UINT_MAX))

  708.             value = s->height;

  709.         s->rps = FFMIN(value, s->height);

  710.         break;

  711.     case TIFF_STRIP_OFFS:

  712.         if (count == 1) {

  713.             s->strippos = 0;

  714.             s->stripoff = value;

  715.         } else

  716.             s->strippos = off;

  717.         s->strips = count;

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

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

  720.         s->sot = type;

  721.         break;

  722.     case TIFF_STRIP_SIZE:

  723.         if (count == 1) {

  724.             s->stripsizesoff = 0;

  725.             s->stripsize     = value;

  726.             s->strips        = 1;

  727.         } else {

  728.             s->stripsizesoff = off;

  729.         }

  730.         s->strips = count;

  731.         s->sstype = type;

  732.         break;

  733.     case TIFF_XRES:

  734.     case TIFF_YRES:

  735.         set_sar(s, tag, value, value2);

  736.         break;

  737.     case TIFF_TILE_BYTE_COUNTS:

  738.     case TIFF_TILE_LENGTH:

  739.     case TIFF_TILE_OFFSETS:

  740.     case TIFF_TILE_WIDTH:

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

  742.         return AVERROR_PATCHWELCOME;

  743.         break;

  744.     case TIFF_PREDICTOR:

  745.         s->predictor = value;

  746.         break;

  747.     case TIFF_INVERT:

  748.         switch (value) {

  749.         case 0:

  750.             s->invert = 1;

  751.             break;

  752.         case 1:

  753.             s->invert = 0;

  754.             break;

  755.         case 2:

  756.         case 3:

  757.             break;

  758.         default:

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

  760.                    value);

  761.             return AVERROR_INVALIDDATA;

  762.         }

  763.         break;

  764.     case TIFF_FILL_ORDER:

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

  766.             av_log(s->avctx, AV_LOG_ERROR,

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

  768.             value = 1;

  769.         }

  770.         s->fill_order = value - 1;

  771.         break;

  772.     case TIFF_PAL: {

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

  774.         off = type_sizes[type];

  775.         if (count / 3 > 256 ||

  776.             bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)

  777.             return AVERROR_INVALIDDATA;

  778. 

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

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

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

  782.                 if (k == 2)

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

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

  785.                 pal[i] |= j;

  786.             }

  787.         }

  788.         s->palette_is_set = 1;

  789.         break;

  790.     }

  791.     case TIFF_PLANAR:

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

  793.         break;

  794.     case TIFF_T4OPTIONS:

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

  796.             s->fax_opts = value;

  797.         break;

  798.     case TIFF_T6OPTIONS:

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

  800.             s->fax_opts = value;

  801.         break;

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

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

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

  805.         goto end;\

  806.     }

  807.     case TIFF_MODEL_PIXEL_SCALE:

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

  809.         break;

  810.     case TIFF_MODEL_TRANSFORMATION:

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

  812.         break;

  813.     case TIFF_MODEL_TIEPOINT:

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

  815.         break;

  816.     case TIFF_GEO_KEY_DIRECTORY:

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

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

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

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

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

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

  823.         }

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

  825.             s->geotag_count = 0;

  826.             return -1;

  827.         }

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

  829.         if (!s->geotags) {

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

  831.             s->geotag_count = 0;

  832.             goto end;

  833.         }

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

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

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

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

  838. 

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

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

  841.             else

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

  843.         }

  844.         break;

  845.     case TIFF_GEO_DOUBLE_PARAMS:

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

  847.             return AVERROR_INVALIDDATA;

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

  849.             return AVERROR_INVALIDDATA;

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

  851.         if (!dp) {

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

  853.             goto end;

  854.         }

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

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

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

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

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

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

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

  862.                 } else {

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

  864.                     if (!ap) {

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

  866.                         av_freep(&dp);

  867.                         return AVERROR(ENOMEM);

  868.                     }

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

  870.                 }

  871.             }

  872.         }

  873.         av_freep(&dp);

  874.         break;

  875.     case TIFF_GEO_ASCII_PARAMS:

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

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

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

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

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

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

  882.                 } else {

  883.                     char *ap;

  884. 

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

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

  887.                         return AVERROR_INVALIDDATA;

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

  889.                     if (!ap) {

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

  891.                         return AVERROR(ENOMEM);

  892.                     }

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

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

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

  896.                 }

  897.             }

  898.         }

  899.         break;

  900.     case TIFF_ARTIST:

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

  902.         break;

  903.     case TIFF_COPYRIGHT:

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

  905.         break;

  906.     case TIFF_DATE:

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

  908.         break;

  909.     case TIFF_DOCUMENT_NAME:

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

  911.         break;

  912.     case TIFF_HOST_COMPUTER:

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

  914.         break;

  915.     case TIFF_IMAGE_DESCRIPTION:

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

  917.         break;

  918.     case TIFF_MAKE:

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

  920.         break;

  921.     case TIFF_MODEL:

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

  923.         break;

  924.     case TIFF_PAGE_NAME:

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

  926.         break;

  927.     case TIFF_PAGE_NUMBER:

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

  929.         break;

  930.     case TIFF_SOFTWARE_NAME:

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

  932.         break;

  933.     default:

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

  935.             av_log(s->avctx, AV_LOG_ERROR,

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

  937.                    tag, tag);

  938.             return AVERROR_INVALIDDATA;

  939.         }

  940.     }

  941. end:

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

  943.     return 0;

  944. }

  945. 

  946. static int decode_frame(AVCodecContext *avctx,

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

  948. {

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

  950.     AVFrame *const p = data;

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

  952.     unsigned off;

  953.     int le, ret, plane, planes;

  954.     int i, j, entries, stride;

  955.     unsigned soff, ssize;

  956.     uint8_t *dst;

  957.     GetByteContext stripsizes;

  958.     GetByteContext stripdata;

  959. 

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

  961. 

  962.     // parse image header

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

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

  965.         return ret;

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

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

  968.         return AVERROR_INVALIDDATA;

  969.     }

  970.     s->le         = le;

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

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

  973.     s->invert     = 0;

  974.     s->compr      = TIFF_RAW;

  975.     s->fill_order = 0;

  976.     free_geotags(s);

  977. 

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

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

  980.     /* parse image file directory */

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

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

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

  984.         return AVERROR_INVALIDDATA;

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

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

  987.             return ret;

  988.     }

  989. 

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

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

  992.         if (!keyname) {

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

  994.             continue;

  995.         }

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

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

  998.             continue;

  999.         }

  1000.         ret = av_dict_set(avpriv_frame_get_metadatap(p), keyname, s->geotags[i].val, 0);

  1001.         if (ret<0) {

  1002.             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);

  1003.             return ret;

  1004.         }

  1005.     }

  1006. 

  1007.     if (!s->strippos && !s->stripoff) {

  1008.         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");

  1009.         return AVERROR_INVALIDDATA;

  1010.     }

  1011.     /* now we have the data and may start decoding */

  1012.     if ((ret = init_image(s, &frame)) < 0)

  1013.         return ret;

  1014. 

  1015.     if (s->strips == 1 && !s->stripsize) {

  1016.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1017.         s->stripsize = avpkt->size - s->stripoff;

  1018.     }

  1019. 

  1020.     if (s->stripsizesoff) {

  1021.         if (s->stripsizesoff >= (unsigned)avpkt->size)

  1022.             return AVERROR_INVALIDDATA;

  1023.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,

  1024.                          avpkt->size - s->stripsizesoff);

  1025.     }

  1026.     if (s->strippos) {

  1027.         if (s->strippos >= (unsigned)avpkt->size)

  1028.             return AVERROR_INVALIDDATA;

  1029.         bytestream2_init(&stripdata, avpkt->data + s->strippos,

  1030.                          avpkt->size - s->strippos);

  1031.     }

  1032. 

  1033.     if (s->rps <= 0) {

  1034.         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);

  1035.         return AVERROR_INVALIDDATA;

  1036.     }

  1037. 

  1038.     planes = s->planar ? s->bppcount : 1;

  1039.     for (plane = 0; plane < planes; plane++) {

  1040.         stride = p->linesize[plane];

  1041.         dst    = p->data[plane];

  1042.     for (i = 0; i < s->height; i += s->rps) {

  1043.         if (s->stripsizesoff)

  1044.             ssize = ff_tget(&stripsizes, s->sstype, le);

  1045.         else

  1046.             ssize = s->stripsize;

  1047. 

  1048.         if (s->strippos)

  1049.             soff = ff_tget(&stripdata, s->sot, le);

  1050.         else

  1051.             soff = s->stripoff;

  1052. 

  1053.         if (soff > avpkt->size || ssize > avpkt->size - soff) {

  1054.             av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1055.             return AVERROR_INVALIDDATA;

  1056.         }

  1057.         if ((ret = tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize,

  1058.                                      FFMIN(s->rps, s->height - i))) < 0) {

  1059.             if (avctx->err_recognition & AV_EF_EXPLODE)

  1060.                 return ret;

  1061.             break;

  1062.         }

  1063.         dst += s->rps * stride;

  1064.     }

  1065.     if (s->predictor == 2) {

  1066.         dst   = p->data[plane];

  1067.         soff  = s->bpp >> 3;

  1068.         if (s->planar)

  1069.             soff  = FFMAX(soff / s->bppcount, 1);

  1070.         ssize = s->width * soff;

  1071.         if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1072.             s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||

  1073.             s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||

  1074.             s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {

  1075.             for (i = 0; i < s->height; i++) {

  1076.                 for (j = soff; j < ssize; j += 2)

  1077.                     AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1078.                 dst += stride;

  1079.             }

  1080.         } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1081.                    s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||

  1082.                    s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||

  1083.                    s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {

  1084.             for (i = 0; i < s->height; i++) {

  1085.                 for (j = soff; j < ssize; j += 2)

  1086.                     AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1087.                 dst += stride;

  1088.             }

  1089.         } else {

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

  1091.                 for (j = soff; j < ssize; j++)

  1092.                     dst[j] += dst[j - soff];

  1093.                 dst += stride;

  1094.             }

  1095.         }

  1096.     }

  1097. 

  1098.     if (s->invert) {

  1099.         dst = p->data[plane];

  1100.         for (i = 0; i < s->height; i++) {

  1101.             for (j = 0; j < p->linesize[plane]; j++)

  1102.                 dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];

  1103.             dst += stride;

  1104.         }

  1105.     }

  1106.     }

  1107. 

  1108.     if (s->planar && s->bppcount > 2) {

  1109.         FFSWAP(uint8_t*, p->data[0],     p->data[2]);

  1110.         FFSWAP(int,      p->linesize[0], p->linesize[2]);

  1111.         FFSWAP(uint8_t*, p->data[0],     p->data[1]);

  1112.         FFSWAP(int,      p->linesize[0], p->linesize[1]);

  1113.     }

  1114. 

  1115.     *got_frame = 1;

  1116. 

  1117.     return avpkt->size;

  1118. }

  1119. 

  1120. static av_cold int tiff_init(AVCodecContext *avctx)

  1121. {

  1122.     TiffContext *s = avctx->priv_data;

  1123. 

  1124.     s->width  = 0;

  1125.     s->height = 0;

  1126.     s->avctx  = avctx;

  1127.     ff_lzw_decode_open(&s->lzw);

  1128.     ff_ccitt_unpack_init();

  1129. 

  1130.     return 0;

  1131. }

  1132. 

  1133. static av_cold int tiff_end(AVCodecContext *avctx)

  1134. {

  1135.     TiffContext *const s = avctx->priv_data;

  1136. 

  1137.     free_geotags(s);

  1138. 

  1139.     ff_lzw_decode_close(&s->lzw);

  1140.     av_freep(&s->deinvert_buf);

  1141.     return 0;

  1142. }

  1143. 

  1144. AVCodec ff_tiff_decoder = {

  1145.     .name           = "tiff",

  1146.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1147.     .type           = AVMEDIA_TYPE_VIDEO,

  1148.     .id             = AV_CODEC_ID_TIFF,

  1149.     .priv_data_size = sizeof(TiffContext),

  1150.     .init           = tiff_init,

  1151.     .close          = tiff_end,

  1152.     .decode         = decode_frame,

  1153.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(tiff_init),

  1154.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,

  1155. };