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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.     enum TiffPhotometric photometric;

  57.     int planar;

  58.     int subsampling[2];

  59.     int fax_opts;

  60.     int predictor;

  61.     int fill_order;

  62.     uint32_t res[4];

  63. 

  64.     int strips, rps, sstype;

  65.     int sot;

  66.     int stripsizesoff, stripsize, stripoff, strippos;

  67.     LZWState *lzw;

  68. 

  69.     uint8_t *deinvert_buf;

  70.     int deinvert_buf_size;

  71. 

  72.     int geotag_count;

  73.     TiffGeoTag *geotags;

  74. } TiffContext;

  75. 

  76. static void free_geotags(TiffContext *const s)

  77. {

  78.     int i;

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

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

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

  82.     }

  83.     av_freep(&s->geotags);

  84.     s->geotag_count = 0;

  85. }

  86. 

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

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

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

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

  91. 

  92. static const char *get_geokey_name(int key)

  93. {

  94.     RET_GEOKEY(VERT, vert, name);

  95.     RET_GEOKEY(PROJ, proj, name);

  96.     RET_GEOKEY(GEOG, geog, name);

  97.     RET_GEOKEY(CONF, conf, name);

  98. 

  99.     return NULL;

  100. }

  101. 

  102. static int get_geokey_type(int key)

  103. {

  104.     RET_GEOKEY(VERT, vert, type);

  105.     RET_GEOKEY(PROJ, proj, type);

  106.     RET_GEOKEY(GEOG, geog, type);

  107.     RET_GEOKEY(CONF, conf, type);

  108. 

  109.     return AVERROR_INVALIDDATA;

  110. }

  111. 

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

  113. {

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

  115. }

  116. 

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

  118. {

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

  120.     if(r)

  121.         return r->name;

  122. 

  123.     return NULL;

  124. }

  125. 

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

  127. {

  128.     char *ap;

  129. 

  130.     if (val == TIFF_GEO_KEY_UNDEFINED)

  131.         return av_strdup("undefined");

  132.     if (val == TIFF_GEO_KEY_USER_DEFINED)

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

  134. 

  135. #define RET_GEOKEY_VAL(TYPE, array)\

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

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

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

  139. 

  140.     switch (key) {

  141.     case TIFF_GT_MODEL_TYPE_GEOKEY:

  142.         RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);

  143.         break;

  144.     case TIFF_GT_RASTER_TYPE_GEOKEY:

  145.         RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);

  146.         break;

  147.     case TIFF_GEOG_LINEAR_UNITS_GEOKEY:

  148.     case TIFF_PROJ_LINEAR_UNITS_GEOKEY:

  149.     case TIFF_VERTICAL_UNITS_GEOKEY:

  150.         RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);

  151.         break;

  152.     case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:

  153.     case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:

  154.         RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);

  155.         break;

  156.     case TIFF_GEOGRAPHIC_TYPE_GEOKEY:

  157.         RET_GEOKEY_VAL(GCS_TYPE, gcs_type);

  158.         RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);

  159.         break;

  160.     case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:

  161.         RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);

  162.         RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);

  163.         break;

  164.     case TIFF_GEOG_ELLIPSOID_GEOKEY:

  165.         RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);

  166.         break;

  167.     case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:

  168.         RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);

  169.         break;

  170.     case TIFF_PROJECTED_CS_TYPE_GEOKEY:

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

  172.         if(ap) return ap;

  173.         break;

  174.     case TIFF_PROJECTION_GEOKEY:

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

  176.         if(ap) return ap;

  177.         break;

  178.     case TIFF_PROJ_COORD_TRANS_GEOKEY:

  179.         RET_GEOKEY_VAL(COORD_TRANS, coord_trans);

  180.         break;

  181.     case TIFF_VERTICAL_CS_TYPE_GEOKEY:

  182.         RET_GEOKEY_VAL(VERT_CS, vert_cs);

  183.         RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);

  184.         break;

  185. 

  186.     }

  187. 

  188.     ap = av_malloc(14);

  189.     if (ap)

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

  191.     return ap;

  192. }

  193. 

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

  195. {

  196.     int i;

  197.     char *ap, *ap0;

  198.     uint64_t component_len;

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

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

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

  202.         return NULL;

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

  204.     if (!ap)

  205.         return NULL;

  206.     ap0   = ap;

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

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

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

  210.         if(l >= component_len) {

  211.             av_free(ap0);

  212.             return NULL;

  213.         }

  214.         ap += l;

  215.     }

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

  217.     return ap0;

  218. }

  219. 

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

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

  222. {

  223.     switch(type) {

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

  225.     case TIFF_SHORT : return ff_tadd_shorts_metadata(count, name, sep, &s->gb, s->le, 0, avpriv_frame_get_metadatap(frame));

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

  227.     default         : return AVERROR_INVALIDDATA;

  228.     };

  229. }

  230. 

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

  232.                                              int usePtr, const uint8_t *src,

  233.                                              uint8_t c, int width, int offset)

  234. {

  235.     switch (bpp) {

  236.     case 1:

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

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

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

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

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

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

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

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

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

  246.         }

  247.         break;

  248.     case 2:

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

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

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

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

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

  254.         }

  255.         break;

  256.     case 4:

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

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

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

  260.         }

  261.         break;

  262.     default:

  263.         if (usePtr) {

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

  265.         } else {

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

  267.         }

  268.     }

  269. }

  270. 

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

  272. {

  273.     int i;

  274. 

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

  276.     if (!s->deinvert_buf)

  277.         return AVERROR(ENOMEM);

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

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

  280. 

  281.     return 0;

  282. }

  283. 

  284. #if CONFIG_ZLIB

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

  286.                            int size)

  287. {

  288.     z_stream zstream = { 0 };

  289.     int zret;

  290. 

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

  292.     zstream.avail_in  = size;

  293.     zstream.next_out  = dst;

  294.     zstream.avail_out = *len;

  295.     zret              = inflateInit(&zstream);

  296.     if (zret != Z_OK) {

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

  298.         return zret;

  299.     }

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

  301.     inflateEnd(&zstream);

  302.     *len = zstream.total_out;

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

  304. }

  305. 

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

  307.                             const uint8_t *src, int size,

  308.                             int width, int lines)

  309. {

  310.     uint8_t *zbuf;

  311.     unsigned long outlen;

  312.     int ret, line;

  313.     outlen = width * lines;

  314.     zbuf   = av_malloc(outlen);

  315.     if (!zbuf)

  316.         return AVERROR(ENOMEM);

  317.     if (s->fill_order) {

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

  319.             av_free(zbuf);

  320.             return ret;

  321.         }

  322.         src = s->deinvert_buf;

  323.     }

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

  325.     if (ret != Z_OK) {

  326.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  329.         av_free(zbuf);

  330.         return AVERROR_UNKNOWN;

  331.     }

  332.     src = zbuf;

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

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

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

  336.         } else {

  337.             memcpy(dst, src, width);

  338.         }

  339.         dst += stride;

  340.         src += width;

  341.     }

  342.     av_free(zbuf);

  343.     return 0;

  344. }

  345. #endif

  346. 

  347. 

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

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

  350. {

  351.     int i, ret = 0;

  352.     int line;

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

  354.                               FF_INPUT_BUFFER_PADDING_SIZE);

  355. 

  356.     if (!src2) {

  357.         av_log(s->avctx, AV_LOG_ERROR,

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

  359.         return AVERROR(ENOMEM);

  360.     }

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

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

  363.         av_free(src2);

  364.         return AVERROR_PATCHWELCOME;

  365.     }

  366.     if (!s->fill_order) {

  367.         memcpy(src2, src, size);

  368.     } else {

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

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

  371.     }

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

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

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

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

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

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

  378.             dst += stride;

  379.         }

  380.     av_free(src2);

  381.     return ret;

  382. }

  383. 

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

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

  386. {

  387.     PutByteContext pb;

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

  389.     const uint8_t *ssrc = src;

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

  391. 

  392.     if (s->planar)

  393.         width /= s->bppcount;

  394. 

  395.     if (size <= 0)

  396.         return AVERROR_INVALIDDATA;

  397. 

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

  399. #if CONFIG_ZLIB

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

  401. #else

  402.         av_log(s->avctx, AV_LOG_ERROR,

  403.                "zlib support not enabled, "

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

  405.         return AVERROR(ENOSYS);

  406. #endif

  407.     }

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

  409.         if (s->fill_order) {

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

  411.                 return ret;

  412.             ssrc = src = s->deinvert_buf;

  413.         }

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

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

  416.         }

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

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

  419.             return ret;

  420.         }

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

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

  423.             if (pixels < width) {

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

  425.                        pixels, width);

  426.                 return AVERROR_INVALIDDATA;

  427.             }

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

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

  430.             dst += stride;

  431.         }

  432.         return 0;

  433.     }

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

  435.         s->compr == TIFF_G3        ||

  436.         s->compr == TIFF_G4) {

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

  438.     }

  439. 

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

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

  442. 

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

  444.         if (src - ssrc > size) {

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

  446.             return AVERROR_INVALIDDATA;

  447.         }

  448. 

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

  450.             break;

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

  452.         switch (s->compr) {

  453.         case TIFF_RAW:

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

  455.                 return AVERROR_INVALIDDATA;

  456. 

  457.             if (!s->fill_order) {

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

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

  460.             } else {

  461.                 int i;

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

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

  464.             }

  465.             src += width;

  466.             break;

  467.         case TIFF_PACKBITS:

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

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

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

  471.                     return AVERROR_INVALIDDATA;

  472.                 }

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

  474.                 if (code >= 0) {

  475.                     code++;

  476.                     if (pixels + code > width ||

  477.                         ssrc + size - src < code) {

  478.                         av_log(s->avctx, AV_LOG_ERROR,

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

  480.                         return AVERROR_INVALIDDATA;

  481.                     }

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

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

  484.                     src    += code;

  485.                     pixels += code;

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

  487.                     code = (-code) + 1;

  488.                     if (pixels + code > width) {

  489.                         av_log(s->avctx, AV_LOG_ERROR,

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

  491.                         return AVERROR_INVALIDDATA;

  492.                     }

  493.                     c = *src++;

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

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

  496.                     pixels += code;

  497.                 }

  498.             }

  499.             if (s->fill_order) {

  500.                 int i;

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

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

  503.             }

  504.             break;

  505.         }

  506.         dst += stride;

  507.     }

  508.     return 0;

  509. }

  510. 

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

  512. {

  513.     int i, ret;

  514.     uint32_t *pal;

  515. 

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

  517.     case 11:

  518.         if (!s->palette_is_set) {

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

  520.             break;

  521.         }

  522.     case 21:

  523.     case 41:

  524.     case 81:

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

  526.         break;

  527.     case 243:

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

  529.         break;

  530.     case 161:

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

  532.         break;

  533.     case 162:

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

  535.         break;

  536.     case 324:

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

  538.         break;

  539.     case 483:

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

  541.         break;

  542.     case 644:

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

  544.         break;

  545.     case 1243:

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

  547.         break;

  548.     case 1324:

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

  550.         break;

  551.     case 1483:

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

  553.         break;

  554.     case 1644:

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

  556.         break;

  557.     default:

  558.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  561.         return AVERROR_INVALIDDATA;

  562.     }

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

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

  565.         if (ret < 0)

  566.             return ret;

  567.     }

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

  569.         return ret;

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

  571.         if (s->palette_is_set) {

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

  573.         } else {

  574.             /* make default grayscale pal */

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

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

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

  578.         }

  579.     }

  580.     return 0;

  581. }

  582. 

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

  584. {

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

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

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

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

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

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

  591. }

  592. 

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

  594. {

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

  596.     int i, start;

  597.     int pos;

  598.     int ret;

  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_PHOTOMETRIC:

  748.         switch (value) {

  749.         case TIFF_PHOTOMETRIC_WHITE_IS_ZERO:

  750.         case TIFF_PHOTOMETRIC_BLACK_IS_ZERO:

  751.         case TIFF_PHOTOMETRIC_RGB:

  752.         case TIFF_PHOTOMETRIC_PALETTE:

  753.             s->photometric = value;

  754.             break;

  755.         case TIFF_PHOTOMETRIC_ALPHA_MASK:

  756.         case TIFF_PHOTOMETRIC_SEPARATED:

  757.         case TIFF_PHOTOMETRIC_YCBCR:

  758.         case TIFF_PHOTOMETRIC_CIE_LAB:

  759.         case TIFF_PHOTOMETRIC_ICC_LAB:

  760.         case TIFF_PHOTOMETRIC_ITU_LAB:

  761.         case TIFF_PHOTOMETRIC_CFA:

  762.         case TIFF_PHOTOMETRIC_LOG_L:

  763.         case TIFF_PHOTOMETRIC_LOG_LUV:

  764.         case TIFF_PHOTOMETRIC_LINEAR_RAW:

  765.             avpriv_report_missing_feature(s->avctx,

  766.                                           "PhotometricInterpretation 0x%04X",

  767.                                           value);

  768.             return AVERROR_PATCHWELCOME;

  769.         default:

  770.             av_log(s->avctx, AV_LOG_ERROR, "PhotometricInterpretation %u is "

  771.                    "unknown\n", value);

  772.             return AVERROR_INVALIDDATA;

  773.         }

  774.         break;

  775.     case TIFF_FILL_ORDER:

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

  777.             av_log(s->avctx, AV_LOG_ERROR,

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

  779.             value = 1;

  780.         }

  781.         s->fill_order = value - 1;

  782.         break;

  783.     case TIFF_PAL: {

  784.         GetByteContext pal_gb[3];

  785.         off = type_sizes[type];

  786.         if (count / 3 > 256 ||

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

  788.             return AVERROR_INVALIDDATA;

  789. 

  790.         pal_gb[0] = pal_gb[1] = pal_gb[2] = s->gb;

  791.         bytestream2_skip(&pal_gb[1], count / 3 * off);

  792.         bytestream2_skip(&pal_gb[2], count / 3 * off * 2);

  793. 

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

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

  796.             uint32_t p = 0xFF000000;

  797.             p |= (ff_tget(&pal_gb[0], type, s->le) >> off) << 16;

  798.             p |= (ff_tget(&pal_gb[1], type, s->le) >> off) << 8;

  799.             p |=  ff_tget(&pal_gb[2], type, s->le) >> off;

  800.             s->palette[i] = p;

  801.         }

  802.         s->palette_is_set = 1;

  803.         break;

  804.     }

  805.     case TIFF_PLANAR:

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

  807.         break;

  808.     case TIFF_YCBCR_SUBSAMPLING:

  809.         if (count != 2) {

  810.             av_log(s->avctx, AV_LOG_ERROR, "subsample count invalid\n");

  811.             return AVERROR_INVALIDDATA;

  812.         }

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

  814.             s->subsampling[i] = ff_tget(&s->gb, type, s->le);

  815.         break;

  816.     case TIFF_T4OPTIONS:

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

  818.             s->fax_opts = value;

  819.         break;

  820.     case TIFF_T6OPTIONS:

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

  822.             s->fax_opts = value;

  823.         break;

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

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

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

  827.         goto end;\

  828.     }

  829.     case TIFF_MODEL_PIXEL_SCALE:

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

  831.         break;

  832.     case TIFF_MODEL_TRANSFORMATION:

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

  834.         break;

  835.     case TIFF_MODEL_TIEPOINT:

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

  837.         break;

  838.     case TIFF_GEO_KEY_DIRECTORY:

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

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

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

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

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

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

  845.         }

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

  847.             s->geotag_count = 0;

  848.             return -1;

  849.         }

  850.         s->geotags = av_mallocz_array(s->geotag_count, sizeof(TiffGeoTag));

  851.         if (!s->geotags) {

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

  853.             s->geotag_count = 0;

  854.             goto end;

  855.         }

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

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

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

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

  860. 

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

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

  863.             else

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

  865.         }

  866.         break;

  867.     case TIFF_GEO_DOUBLE_PARAMS:

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

  869.             return AVERROR_INVALIDDATA;

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

  871.             return AVERROR_INVALIDDATA;

  872.         dp = av_malloc_array(count, sizeof(double));

  873.         if (!dp) {

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

  875.             goto end;

  876.         }

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

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

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

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

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

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

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

  884.                 } else {

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

  886.                     if (!ap) {

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

  888.                         av_freep(&dp);

  889.                         return AVERROR(ENOMEM);

  890.                     }

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

  892.                 }

  893.             }

  894.         }

  895.         av_freep(&dp);

  896.         break;

  897.     case TIFF_GEO_ASCII_PARAMS:

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

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

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

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

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

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

  904.                 } else {

  905.                     char *ap;

  906. 

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

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

  909.                         return AVERROR_INVALIDDATA;

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

  911.                     if (!ap) {

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

  913.                         return AVERROR(ENOMEM);

  914.                     }

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

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

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

  918.                 }

  919.             }

  920.         }

  921.         break;

  922.     case TIFF_ARTIST:

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

  924.         break;

  925.     case TIFF_COPYRIGHT:

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

  927.         break;

  928.     case TIFF_DATE:

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

  930.         break;

  931.     case TIFF_DOCUMENT_NAME:

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

  933.         break;

  934.     case TIFF_HOST_COMPUTER:

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

  936.         break;

  937.     case TIFF_IMAGE_DESCRIPTION:

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

  939.         break;

  940.     case TIFF_MAKE:

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

  942.         break;

  943.     case TIFF_MODEL:

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

  945.         break;

  946.     case TIFF_PAGE_NAME:

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

  948.         break;

  949.     case TIFF_PAGE_NUMBER:

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

  951.         break;

  952.     case TIFF_SOFTWARE_NAME:

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

  954.         break;

  955.     default:

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

  957.             av_log(s->avctx, AV_LOG_ERROR,

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

  959.                    tag, tag);

  960.             return AVERROR_INVALIDDATA;

  961.         }

  962.     }

  963. end:

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

  965.     return 0;

  966. }

  967. 

  968. static int decode_frame(AVCodecContext *avctx,

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

  970. {

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

  972.     AVFrame *const p = data;

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

  974.     unsigned off;

  975.     int le, ret, plane, planes;

  976.     int i, j, entries, stride;

  977.     unsigned soff, ssize;

  978.     uint8_t *dst;

  979.     GetByteContext stripsizes;

  980.     GetByteContext stripdata;

  981. 

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

  983. 

  984.     // parse image header

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

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

  987.         return ret;

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

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

  990.         return AVERROR_INVALIDDATA;

  991.     }

  992.     s->le          = le;

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

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

  995.     s->photometric = TIFF_PHOTOMETRIC_NONE;

  996.     s->compr       = TIFF_RAW;

  997.     s->fill_order  = 0;

  998.     free_geotags(s);

  999. 

  1000.     // Reset these offsets so we can tell if they were set this frame

  1001.     s->stripsizesoff = s->strippos = 0;

  1002.     /* parse image file directory */

  1003.     bytestream2_seek(&s->gb, off, SEEK_SET);

  1004.     entries = ff_tget_short(&s->gb, le);

  1005.     if (bytestream2_get_bytes_left(&s->gb) < entries * 12)

  1006.         return AVERROR_INVALIDDATA;

  1007.     for (i = 0; i < entries; i++) {

  1008.         if ((ret = tiff_decode_tag(s, p)) < 0)

  1009.             return ret;

  1010.     }

  1011. 

  1012.     for (i = 0; i<s->geotag_count; i++) {

  1013.         const char *keyname = get_geokey_name(s->geotags[i].key);

  1014.         if (!keyname) {

  1015.             av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);

  1016.             continue;

  1017.         }

  1018.         if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {

  1019.             av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);

  1020.             continue;

  1021.         }

  1022.         ret = av_dict_set(avpriv_frame_get_metadatap(p), keyname, s->geotags[i].val, 0);

  1023.         if (ret<0) {

  1024.             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);

  1025.             return ret;

  1026.         }

  1027.     }

  1028. 

  1029.     if (!s->strippos && !s->stripoff) {

  1030.         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");

  1031.         return AVERROR_INVALIDDATA;

  1032.     }

  1033.     /* now we have the data and may start decoding */

  1034.     if ((ret = init_image(s, &frame)) < 0)

  1035.         return ret;

  1036. 

  1037.     if (s->strips == 1 && !s->stripsize) {

  1038.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1039.         s->stripsize = avpkt->size - s->stripoff;

  1040.     }

  1041. 

  1042.     if (s->stripsizesoff) {

  1043.         if (s->stripsizesoff >= (unsigned)avpkt->size)

  1044.             return AVERROR_INVALIDDATA;

  1045.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,

  1046.                          avpkt->size - s->stripsizesoff);

  1047.     }

  1048.     if (s->strippos) {

  1049.         if (s->strippos >= (unsigned)avpkt->size)

  1050.             return AVERROR_INVALIDDATA;

  1051.         bytestream2_init(&stripdata, avpkt->data + s->strippos,

  1052.                          avpkt->size - s->strippos);

  1053.     }

  1054. 

  1055.     if (s->rps <= 0) {

  1056.         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);

  1057.         return AVERROR_INVALIDDATA;

  1058.     }

  1059. 

  1060.     planes = s->planar ? s->bppcount : 1;

  1061.     for (plane = 0; plane < planes; plane++) {

  1062.         stride = p->linesize[plane];

  1063.         dst    = p->data[plane];

  1064.     for (i = 0; i < s->height; i += s->rps) {

  1065.         if (s->stripsizesoff)

  1066.             ssize = ff_tget(&stripsizes, s->sstype, le);

  1067.         else

  1068.             ssize = s->stripsize;

  1069. 

  1070.         if (s->strippos)

  1071.             soff = ff_tget(&stripdata, s->sot, le);

  1072.         else

  1073.             soff = s->stripoff;

  1074. 

  1075.         if (soff > avpkt->size || ssize > avpkt->size - soff) {

  1076.             av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1077.             return AVERROR_INVALIDDATA;

  1078.         }

  1079.         if ((ret = tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize,

  1080.                                      FFMIN(s->rps, s->height - i))) < 0) {

  1081.             if (avctx->err_recognition & AV_EF_EXPLODE)

  1082.                 return ret;

  1083.             break;

  1084.         }

  1085.         dst += s->rps * stride;

  1086.     }

  1087.     if (s->predictor == 2) {

  1088.         dst   = p->data[plane];

  1089.         soff  = s->bpp >> 3;

  1090.         if (s->planar)

  1091.             soff  = FFMAX(soff / s->bppcount, 1);

  1092.         ssize = s->width * soff;

  1093.         if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1094.             s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||

  1095.             s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||

  1096.             s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {

  1097.             for (i = 0; i < s->height; i++) {

  1098.                 for (j = soff; j < ssize; j += 2)

  1099.                     AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1100.                 dst += stride;

  1101.             }

  1102.         } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1103.                    s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||

  1104.                    s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||

  1105.                    s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {

  1106.             for (i = 0; i < s->height; i++) {

  1107.                 for (j = soff; j < ssize; j += 2)

  1108.                     AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1109.                 dst += stride;

  1110.             }

  1111.         } else {

  1112.             for (i = 0; i < s->height; i++) {

  1113.                 for (j = soff; j < ssize; j++)

  1114.                     dst[j] += dst[j - soff];

  1115.                 dst += stride;

  1116.             }

  1117.         }

  1118.     }

  1119. 

  1120.     if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {

  1121.         dst = p->data[plane];

  1122.         for (i = 0; i < s->height; i++) {

  1123.             for (j = 0; j < p->linesize[plane]; j++)

  1124.                 dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];

  1125.             dst += stride;

  1126.         }

  1127.     }

  1128.     }

  1129. 

  1130.     if (s->planar && s->bppcount > 2) {

  1131.         FFSWAP(uint8_t*, p->data[0],     p->data[2]);

  1132.         FFSWAP(int,      p->linesize[0], p->linesize[2]);

  1133.         FFSWAP(uint8_t*, p->data[0],     p->data[1]);

  1134.         FFSWAP(int,      p->linesize[0], p->linesize[1]);

  1135.     }

  1136. 

  1137.     *got_frame = 1;

  1138. 

  1139.     return avpkt->size;

  1140. }

  1141. 

  1142. static av_cold int tiff_init(AVCodecContext *avctx)

  1143. {

  1144.     TiffContext *s = avctx->priv_data;

  1145. 

  1146.     s->width  = 0;

  1147.     s->height = 0;

  1148.     s->subsampling[0] =

  1149.     s->subsampling[1] = 1;

  1150.     s->avctx  = avctx;

  1151.     ff_lzw_decode_open(&s->lzw);

  1152.     ff_ccitt_unpack_init();

  1153. 

  1154.     return 0;

  1155. }

  1156. 

  1157. static av_cold int tiff_end(AVCodecContext *avctx)

  1158. {

  1159.     TiffContext *const s = avctx->priv_data;

  1160. 

  1161.     free_geotags(s);

  1162. 

  1163.     ff_lzw_decode_close(&s->lzw);

  1164.     av_freep(&s->deinvert_buf);

  1165.     return 0;

  1166. }

  1167. 

  1168. AVCodec ff_tiff_decoder = {

  1169.     .name           = "tiff",

  1170.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1171.     .type           = AVMEDIA_TYPE_VIDEO,

  1172.     .id             = AV_CODEC_ID_TIFF,

  1173.     .priv_data_size = sizeof(TiffContext),

  1174.     .init           = tiff_init,

  1175.     .close          = tiff_end,

  1176.     .decode         = decode_frame,

  1177.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(tiff_init),

  1178.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,

  1179. };