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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.     uint8_t *yuv_line;

  72.     unsigned int yuv_line_size;

  73. 

  74.     int geotag_count;

  75.     TiffGeoTag *geotags;

  76. } TiffContext;

  77. 

  78. static void free_geotags(TiffContext *const s)

  79. {

  80.     int i;

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

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

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

  84.     }

  85.     av_freep(&s->geotags);

  86.     s->geotag_count = 0;

  87. }

  88. 

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

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

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

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

  93. 

  94. static const char *get_geokey_name(int key)

  95. {

  96.     RET_GEOKEY(VERT, vert, name);

  97.     RET_GEOKEY(PROJ, proj, name);

  98.     RET_GEOKEY(GEOG, geog, name);

  99.     RET_GEOKEY(CONF, conf, name);

  100. 

  101.     return NULL;

  102. }

  103. 

  104. static int get_geokey_type(int key)

  105. {

  106.     RET_GEOKEY(VERT, vert, type);

  107.     RET_GEOKEY(PROJ, proj, type);

  108.     RET_GEOKEY(GEOG, geog, type);

  109.     RET_GEOKEY(CONF, conf, type);

  110. 

  111.     return AVERROR_INVALIDDATA;

  112. }

  113. 

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

  115. {

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

  117. }

  118. 

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

  120. {

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

  122.     if(r)

  123.         return r->name;

  124. 

  125.     return NULL;

  126. }

  127. 

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

  129. {

  130.     char *ap;

  131. 

  132.     if (val == TIFF_GEO_KEY_UNDEFINED)

  133.         return av_strdup("undefined");

  134.     if (val == TIFF_GEO_KEY_USER_DEFINED)

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

  136. 

  137. #define RET_GEOKEY_VAL(TYPE, array)\

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

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

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

  141. 

  142.     switch (key) {

  143.     case TIFF_GT_MODEL_TYPE_GEOKEY:

  144.         RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);

  145.         break;

  146.     case TIFF_GT_RASTER_TYPE_GEOKEY:

  147.         RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);

  148.         break;

  149.     case TIFF_GEOG_LINEAR_UNITS_GEOKEY:

  150.     case TIFF_PROJ_LINEAR_UNITS_GEOKEY:

  151.     case TIFF_VERTICAL_UNITS_GEOKEY:

  152.         RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);

  153.         break;

  154.     case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:

  155.     case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:

  156.         RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);

  157.         break;

  158.     case TIFF_GEOGRAPHIC_TYPE_GEOKEY:

  159.         RET_GEOKEY_VAL(GCS_TYPE, gcs_type);

  160.         RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);

  161.         break;

  162.     case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:

  163.         RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);

  164.         RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);

  165.         break;

  166.     case TIFF_GEOG_ELLIPSOID_GEOKEY:

  167.         RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);

  168.         break;

  169.     case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:

  170.         RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);

  171.         break;

  172.     case TIFF_PROJECTED_CS_TYPE_GEOKEY:

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

  174.         if(ap) return ap;

  175.         break;

  176.     case TIFF_PROJECTION_GEOKEY:

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

  178.         if(ap) return ap;

  179.         break;

  180.     case TIFF_PROJ_COORD_TRANS_GEOKEY:

  181.         RET_GEOKEY_VAL(COORD_TRANS, coord_trans);

  182.         break;

  183.     case TIFF_VERTICAL_CS_TYPE_GEOKEY:

  184.         RET_GEOKEY_VAL(VERT_CS, vert_cs);

  185.         RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);

  186.         break;

  187. 

  188.     }

  189. 

  190.     ap = av_malloc(14);

  191.     if (ap)

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

  193.     return ap;

  194. }

  195. 

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

  197. {

  198.     int i;

  199.     char *ap, *ap0;

  200.     uint64_t component_len;

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

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

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

  204.         return NULL;

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

  206.     if (!ap)

  207.         return NULL;

  208.     ap0   = ap;

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

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

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

  212.         if(l >= component_len) {

  213.             av_free(ap0);

  214.             return NULL;

  215.         }

  216.         ap += l;

  217.     }

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

  219.     return ap0;

  220. }

  221. 

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

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

  224. {

  225.     switch(type) {

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

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

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

  229.     default         : return AVERROR_INVALIDDATA;

  230.     };

  231. }

  232. 

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

  234.                                              int usePtr, const uint8_t *src,

  235.                                              uint8_t c, int width, int offset)

  236. {

  237.     switch (bpp) {

  238.     case 1:

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

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

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

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

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

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

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

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

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

  248.         }

  249.         break;

  250.     case 2:

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

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

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

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

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

  256.         }

  257.         break;

  258.     case 4:

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

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

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

  262.         }

  263.         break;

  264.     default:

  265.         if (usePtr) {

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

  267.         } else {

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

  269.         }

  270.     }

  271. }

  272. 

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

  274. {

  275.     int i;

  276. 

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

  278.     if (!s->deinvert_buf)

  279.         return AVERROR(ENOMEM);

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

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

  282. 

  283.     return 0;

  284. }

  285. 

  286. #if CONFIG_ZLIB

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

  288.                            int size)

  289. {

  290.     z_stream zstream = { 0 };

  291.     int zret;

  292. 

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

  294.     zstream.avail_in  = size;

  295.     zstream.next_out  = dst;

  296.     zstream.avail_out = *len;

  297.     zret              = inflateInit(&zstream);

  298.     if (zret != Z_OK) {

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

  300.         return zret;

  301.     }

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

  303.     inflateEnd(&zstream);

  304.     *len = zstream.total_out;

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

  306. }

  307. 

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

  309.                             const uint8_t *src, int size,

  310.                             int width, int lines)

  311. {

  312.     uint8_t *zbuf;

  313.     unsigned long outlen;

  314.     int ret, line;

  315.     outlen = width * lines;

  316.     zbuf   = av_malloc(outlen);

  317.     if (!zbuf)

  318.         return AVERROR(ENOMEM);

  319.     if (s->fill_order) {

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

  321.             av_free(zbuf);

  322.             return ret;

  323.         }

  324.         src = s->deinvert_buf;

  325.     }

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

  327.     if (ret != Z_OK) {

  328.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  331.         av_free(zbuf);

  332.         return AVERROR_UNKNOWN;

  333.     }

  334.     src = zbuf;

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

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

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

  338.         } else {

  339.             memcpy(dst, src, width);

  340.         }

  341.         dst += stride;

  342.         src += width;

  343.     }

  344.     av_free(zbuf);

  345.     return 0;

  346. }

  347. #endif

  348. 

  349. 

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

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

  352. {

  353.     int i, ret = 0;

  354.     int line;

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

  356.                               FF_INPUT_BUFFER_PADDING_SIZE);

  357. 

  358.     if (!src2) {

  359.         av_log(s->avctx, AV_LOG_ERROR,

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

  361.         return AVERROR(ENOMEM);

  362.     }

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

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

  365.         av_free(src2);

  366.         return AVERROR_PATCHWELCOME;

  367.     }

  368.     if (!s->fill_order) {

  369.         memcpy(src2, src, size);

  370.     } else {

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

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

  373.     }

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

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

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

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

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

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

  380.             dst += stride;

  381.         }

  382.     av_free(src2);

  383.     return ret;

  384. }

  385. 

  386. static void unpack_yuv(TiffContext *s, AVFrame *p,

  387.                        const uint8_t *src, int lnum)

  388. {

  389.     int i, j, k;

  390.     int w       = (s->width - 1) / s->subsampling[0] + 1;

  391.     uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];

  392.     uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];

  393.     if (s->width % s->subsampling[0] || s->height % s->subsampling[1]) {

  394.         for (i = 0; i < w; i++) {

  395.             for (j = 0; j < s->subsampling[1]; j++)

  396.                 for (k = 0; k < s->subsampling[0]; k++)

  397.                     p->data[0][FFMIN(lnum + j, s->height-1) * p->linesize[0] +

  398.                                FFMIN(i * s->subsampling[0] + k, s->width-1)] = *src++;

  399.             *pu++ = *src++;

  400.             *pv++ = *src++;

  401.         }

  402.     }else{

  403.         for (i = 0; i < w; i++) {

  404.             for (j = 0; j < s->subsampling[1]; j++)

  405.                 for (k = 0; k < s->subsampling[0]; k++)

  406.                     p->data[0][(lnum + j) * p->linesize[0] +

  407.                                i * s->subsampling[0] + k] = *src++;

  408.             *pu++ = *src++;

  409.             *pv++ = *src++;

  410.         }

  411.     }

  412. }

  413. 

  414. 

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

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

  417. {

  418.     PutByteContext pb;

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

  420.     const uint8_t *ssrc = src;

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

  422.     int is_yuv = s->photometric == TIFF_PHOTOMETRIC_YCBCR;

  423. 

  424.     if (s->planar)

  425.         width /= s->bppcount;

  426. 

  427.     if (size <= 0)

  428.         return AVERROR_INVALIDDATA;

  429. 

  430.     if (is_yuv) {

  431.         int bytes_per_row = (((s->width - 1) / s->subsampling[0] + 1) * s->bpp *

  432.                             s->subsampling[0] * s->subsampling[1] + 7) >> 3;

  433.         av_fast_padded_malloc(&s->yuv_line, &s->yuv_line_size, bytes_per_row);

  434.         if (s->yuv_line == NULL) {

  435.             av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");

  436.             return AVERROR(ENOMEM);

  437.         }

  438.         dst = s->yuv_line;

  439.         stride = 0;

  440.         width = s->width * s->subsampling[1] + 2*(s->width / s->subsampling[0]);

  441.         av_assert0(width <= bytes_per_row);

  442.         av_assert0(s->bpp == 24);

  443.     }

  444. 

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

  446.         if (is_yuv) {

  447.             av_log(s->avctx, AV_LOG_ERROR, "YUV deflate is unsupported");

  448.             return AVERROR_PATCHWELCOME;

  449.         }

  450. #if CONFIG_ZLIB

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

  452. #else

  453.         av_log(s->avctx, AV_LOG_ERROR,

  454.                "zlib support not enabled, "

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

  456.         return AVERROR(ENOSYS);

  457. #endif

  458.     }

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

  460.         if (s->fill_order) {

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

  462.                 return ret;

  463.             ssrc = src = s->deinvert_buf;

  464.         }

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

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

  467.         }

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

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

  470.             return ret;

  471.         }

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

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

  474.             if (pixels < width) {

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

  476.                        pixels, width);

  477.                 return AVERROR_INVALIDDATA;

  478.             }

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

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

  481.             if (is_yuv) {

  482.                 unpack_yuv(s, p, dst, strip_start + line);

  483.                 line += s->subsampling[1] - 1;

  484.             }

  485.             dst += stride;

  486.         }

  487.         return 0;

  488.     }

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

  490.         s->compr == TIFF_G3        ||

  491.         s->compr == TIFF_G4) {

  492.         if (is_yuv)

  493.             return AVERROR_INVALIDDATA;

  494. 

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

  496.     }

  497. 

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

  499.     bytestream2_init_writer(&pb, dst, is_yuv ? s->yuv_line_size : (stride * lines));

  500. 

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

  502.         if (src - ssrc > size) {

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

  504.             return AVERROR_INVALIDDATA;

  505.         }

  506. 

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

  508.             break;

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

  510.         switch (s->compr) {

  511.         case TIFF_RAW:

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

  513.                 return AVERROR_INVALIDDATA;

  514. 

  515.             if (!s->fill_order) {

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

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

  518.             } else {

  519.                 int i;

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

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

  522.             }

  523.             src += width;

  524.             break;

  525.         case TIFF_PACKBITS:

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

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

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

  529.                     return AVERROR_INVALIDDATA;

  530.                 }

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

  532.                 if (code >= 0) {

  533.                     code++;

  534.                     if (pixels + code > width ||

  535.                         ssrc + size - src < code) {

  536.                         av_log(s->avctx, AV_LOG_ERROR,

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

  538.                         return AVERROR_INVALIDDATA;

  539.                     }

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

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

  542.                     src    += code;

  543.                     pixels += code;

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

  545.                     code = (-code) + 1;

  546.                     if (pixels + code > width) {

  547.                         av_log(s->avctx, AV_LOG_ERROR,

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

  549.                         return AVERROR_INVALIDDATA;

  550.                     }

  551.                     c = *src++;

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

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

  554.                     pixels += code;

  555.                 }

  556.             }

  557.             if (s->fill_order) {

  558.                 int i;

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

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

  561.             }

  562.             break;

  563.         }

  564.         if (is_yuv) {

  565.             unpack_yuv(s, p, dst, strip_start + line);

  566.             line += s->subsampling[1] - 1;

  567.         }

  568.         dst += stride;

  569.     }

  570.     return 0;

  571. }

  572. 

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

  574. {

  575.     int i, ret;

  576.     uint32_t *pal;

  577. 

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

  579.     case 11:

  580.         if (!s->palette_is_set) {

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

  582.             break;

  583.         }

  584.     case 21:

  585.     case 41:

  586.     case 81:

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

  588.         break;

  589.     case 243:

  590.         if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {

  591.             if (s->subsampling[0] == 1 && s->subsampling[1] == 1) {

  592.                 s->avctx->pix_fmt = AV_PIX_FMT_YUV444P;

  593.             } else if (s->subsampling[0] == 2 && s->subsampling[1] == 1) {

  594.                 s->avctx->pix_fmt = AV_PIX_FMT_YUV422P;

  595.             } else if (s->subsampling[0] == 4 && s->subsampling[1] == 1) {

  596.                 s->avctx->pix_fmt = AV_PIX_FMT_YUV411P;

  597.             } else if (s->subsampling[0] == 1 && s->subsampling[1] == 2) {

  598.                 s->avctx->pix_fmt = AV_PIX_FMT_YUV440P;

  599.             } else if (s->subsampling[0] == 2 && s->subsampling[1] == 2) {

  600.                 s->avctx->pix_fmt = AV_PIX_FMT_YUV420P;

  601.             } else if (s->subsampling[0] == 4 && s->subsampling[1] == 4) {

  602.                 s->avctx->pix_fmt = AV_PIX_FMT_YUV410P;

  603.             } else {

  604.                 av_log(s->avctx, AV_LOG_ERROR, "Unsupported YCbCr subsampling\n");

  605.                 return AVERROR_PATCHWELCOME;

  606.             }

  607.         } else

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

  609.         break;

  610.     case 161:

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

  612.         break;

  613.     case 162:

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

  615.         break;

  616.     case 324:

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

  618.         break;

  619.     case 483:

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

  621.         break;

  622.     case 644:

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

  624.         break;

  625.     case 1243:

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

  627.         break;

  628.     case 1324:

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

  630.         break;

  631.     case 1483:

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

  633.         break;

  634.     case 1644:

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

  636.         break;

  637.     default:

  638.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  641.         return AVERROR_INVALIDDATA;

  642.     }

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

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

  645.         if (ret < 0)

  646.             return ret;

  647.     }

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

  649.         return ret;

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

  651.         if (s->palette_is_set) {

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

  653.         } else {

  654.             /* make default grayscale pal */

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

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

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

  658.         }

  659.     }

  660.     return 0;

  661. }

  662. 

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

  664. {

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

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

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

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

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

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

  671. }

  672. 

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

  674. {

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

  676.     int i, start;

  677.     int pos;

  678.     int ret;

  679.     double *dp;

  680. 

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

  682.     if (ret < 0) {

  683.         goto end;

  684.     }

  685. 

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

  687.     if (count == 1) {

  688.         switch (type) {

  689.         case TIFF_BYTE:

  690.         case TIFF_SHORT:

  691.         case TIFF_LONG:

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

  693.             break;

  694.         case TIFF_RATIONAL:

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

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

  697.             break;

  698.         case TIFF_STRING:

  699.             if (count <= 4) {

  700.                 break;

  701.             }

  702.         default:

  703.             value = UINT_MAX;

  704.         }

  705.     }

  706. 

  707.     switch (tag) {

  708.     case TIFF_WIDTH:

  709.         s->width = value;

  710.         break;

  711.     case TIFF_HEIGHT:

  712.         s->height = value;

  713.         break;

  714.     case TIFF_BPP:

  715.         if (count > 4U) {

  716.             av_log(s->avctx, AV_LOG_ERROR,

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

  718.                    value, count);

  719.             return AVERROR_INVALIDDATA;

  720.         }

  721.         s->bppcount = count;

  722.         if (count == 1)

  723.             s->bpp = value;

  724.         else {

  725.             switch (type) {

  726.             case TIFF_BYTE:

  727.             case TIFF_SHORT:

  728.             case TIFF_LONG:

  729.                 s->bpp = 0;

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

  731.                     return AVERROR_INVALIDDATA;

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

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

  734.                 break;

  735.             default:

  736.                 s->bpp = -1;

  737.             }

  738.         }

  739.         if (s->bpp > 64U) {

  740.             av_log(s->avctx, AV_LOG_ERROR,

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

  742.                    s->bpp, count);

  743.             s->bpp = 0;

  744.             return AVERROR_INVALIDDATA;

  745.         }

  746.         break;

  747.     case TIFF_SAMPLES_PER_PIXEL:

  748.         if (count != 1) {

  749.             av_log(s->avctx, AV_LOG_ERROR,

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

  751.             return AVERROR_INVALIDDATA;

  752.         }

  753.         if (value > 4U) {

  754.             av_log(s->avctx, AV_LOG_ERROR,

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

  756.             return AVERROR_INVALIDDATA;

  757.         }

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

  759.             s->bpp *= value;

  760.         s->bppcount = value;

  761.         break;

  762.     case TIFF_COMPR:

  763.         s->compr     = value;

  764.         s->predictor = 0;

  765.         switch (s->compr) {

  766.         case TIFF_RAW:

  767.         case TIFF_PACKBITS:

  768.         case TIFF_LZW:

  769.         case TIFF_CCITT_RLE:

  770.             break;

  771.         case TIFF_G3:

  772.         case TIFF_G4:

  773.             s->fax_opts = 0;

  774.             break;

  775.         case TIFF_DEFLATE:

  776.         case TIFF_ADOBE_DEFLATE:

  777. #if CONFIG_ZLIB

  778.             break;

  779. #else

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

  781.             return AVERROR(ENOSYS);

  782. #endif

  783.         case TIFF_JPEG:

  784.         case TIFF_NEWJPEG:

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

  786.             return AVERROR_PATCHWELCOME;

  787.         default:

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

  789.                    s->compr);

  790.             return AVERROR_INVALIDDATA;

  791.         }

  792.         break;

  793.     case TIFF_ROWSPERSTRIP:

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

  795.             value = s->height;

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

  797.         break;

  798.     case TIFF_STRIP_OFFS:

  799.         if (count == 1) {

  800.             s->strippos = 0;

  801.             s->stripoff = value;

  802.         } else

  803.             s->strippos = off;

  804.         s->strips = count;

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

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

  807.         s->sot = type;

  808.         break;

  809.     case TIFF_STRIP_SIZE:

  810.         if (count == 1) {

  811.             s->stripsizesoff = 0;

  812.             s->stripsize     = value;

  813.             s->strips        = 1;

  814.         } else {

  815.             s->stripsizesoff = off;

  816.         }

  817.         s->strips = count;

  818.         s->sstype = type;

  819.         break;

  820.     case TIFF_XRES:

  821.     case TIFF_YRES:

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

  823.         break;

  824.     case TIFF_TILE_BYTE_COUNTS:

  825.     case TIFF_TILE_LENGTH:

  826.     case TIFF_TILE_OFFSETS:

  827.     case TIFF_TILE_WIDTH:

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

  829.         return AVERROR_PATCHWELCOME;

  830.         break;

  831.     case TIFF_PREDICTOR:

  832.         s->predictor = value;

  833.         break;

  834.     case TIFF_PHOTOMETRIC:

  835.         switch (value) {

  836.         case TIFF_PHOTOMETRIC_WHITE_IS_ZERO:

  837.         case TIFF_PHOTOMETRIC_BLACK_IS_ZERO:

  838.         case TIFF_PHOTOMETRIC_RGB:

  839.         case TIFF_PHOTOMETRIC_PALETTE:

  840.         case TIFF_PHOTOMETRIC_YCBCR:

  841.             s->photometric = value;

  842.             break;

  843.         case TIFF_PHOTOMETRIC_ALPHA_MASK:

  844.         case TIFF_PHOTOMETRIC_SEPARATED:

  845.         case TIFF_PHOTOMETRIC_CIE_LAB:

  846.         case TIFF_PHOTOMETRIC_ICC_LAB:

  847.         case TIFF_PHOTOMETRIC_ITU_LAB:

  848.         case TIFF_PHOTOMETRIC_CFA:

  849.         case TIFF_PHOTOMETRIC_LOG_L:

  850.         case TIFF_PHOTOMETRIC_LOG_LUV:

  851.         case TIFF_PHOTOMETRIC_LINEAR_RAW:

  852.             avpriv_report_missing_feature(s->avctx,

  853.                                           "PhotometricInterpretation 0x%04X",

  854.                                           value);

  855.             return AVERROR_PATCHWELCOME;

  856.         default:

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

  858.                    "unknown\n", value);

  859.             return AVERROR_INVALIDDATA;

  860.         }

  861.         break;

  862.     case TIFF_FILL_ORDER:

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

  864.             av_log(s->avctx, AV_LOG_ERROR,

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

  866.             value = 1;

  867.         }

  868.         s->fill_order = value - 1;

  869.         break;

  870.     case TIFF_PAL: {

  871.         GetByteContext pal_gb[3];

  872.         off = type_sizes[type];

  873.         if (count / 3 > 256 ||

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

  875.             return AVERROR_INVALIDDATA;

  876. 

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

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

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

  880. 

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

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

  883.             uint32_t p = 0xFF000000;

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

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

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

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

  888.         }

  889.         s->palette_is_set = 1;

  890.         break;

  891.     }

  892.     case TIFF_PLANAR:

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

  894.         break;

  895.     case TIFF_YCBCR_SUBSAMPLING:

  896.         if (count != 2) {

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

  898.             return AVERROR_INVALIDDATA;

  899.         }

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

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

  902.         break;

  903.     case TIFF_T4OPTIONS:

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

  905.             s->fax_opts = value;

  906.         break;

  907.     case TIFF_T6OPTIONS:

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

  909.             s->fax_opts = value;

  910.         break;

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

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

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

  914.         goto end;\

  915.     }

  916.     case TIFF_MODEL_PIXEL_SCALE:

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

  918.         break;

  919.     case TIFF_MODEL_TRANSFORMATION:

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

  921.         break;

  922.     case TIFF_MODEL_TIEPOINT:

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

  924.         break;

  925.     case TIFF_GEO_KEY_DIRECTORY:

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

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

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

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

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

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

  932.         }

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

  934.             s->geotag_count = 0;

  935.             return -1;

  936.         }

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

  938.         if (!s->geotags) {

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

  940.             s->geotag_count = 0;

  941.             goto end;

  942.         }

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

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

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

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

  947. 

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

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

  950.             else

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

  952.         }

  953.         break;

  954.     case TIFF_GEO_DOUBLE_PARAMS:

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

  956.             return AVERROR_INVALIDDATA;

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

  958.             return AVERROR_INVALIDDATA;

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

  960.         if (!dp) {

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

  962.             goto end;

  963.         }

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

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

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

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

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

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

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

  971.                 } else {

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

  973.                     if (!ap) {

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

  975.                         av_freep(&dp);

  976.                         return AVERROR(ENOMEM);

  977.                     }

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

  979.                 }

  980.             }

  981.         }

  982.         av_freep(&dp);

  983.         break;

  984.     case TIFF_GEO_ASCII_PARAMS:

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

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

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

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

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

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

  991.                 } else {

  992.                     char *ap;

  993. 

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

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

  996.                         return AVERROR_INVALIDDATA;

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

  998.                     if (!ap) {

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

  1000.                         return AVERROR(ENOMEM);

  1001.                     }

  1002.                     bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);

  1003.                     ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte

  1004.                     s->geotags[i].val = ap;

  1005.                 }

  1006.             }

  1007.         }

  1008.         break;

  1009.     case TIFF_ARTIST:

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

  1011.         break;

  1012.     case TIFF_COPYRIGHT:

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

  1014.         break;

  1015.     case TIFF_DATE:

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

  1017.         break;

  1018.     case TIFF_DOCUMENT_NAME:

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

  1020.         break;

  1021.     case TIFF_HOST_COMPUTER:

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

  1023.         break;

  1024.     case TIFF_IMAGE_DESCRIPTION:

  1025.         ADD_METADATA(count, "description", NULL);

  1026.         break;

  1027.     case TIFF_MAKE:

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

  1029.         break;

  1030.     case TIFF_MODEL:

  1031.         ADD_METADATA(count, "model", NULL);

  1032.         break;

  1033.     case TIFF_PAGE_NAME:

  1034.         ADD_METADATA(count, "page_name", NULL);

  1035.         break;

  1036.     case TIFF_PAGE_NUMBER:

  1037.         ADD_METADATA(count, "page_number", " / ");

  1038.         break;

  1039.     case TIFF_SOFTWARE_NAME:

  1040.         ADD_METADATA(count, "software", NULL);

  1041.         break;

  1042.     default:

  1043.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  1044.             av_log(s->avctx, AV_LOG_ERROR,

  1045.                    "Unknown or unsupported tag %d/0X%0X\n",

  1046.                    tag, tag);

  1047.             return AVERROR_INVALIDDATA;

  1048.         }

  1049.     }

  1050. end:

  1051.     bytestream2_seek(&s->gb, start, SEEK_SET);

  1052.     return 0;

  1053. }

  1054. 

  1055. static int decode_frame(AVCodecContext *avctx,

  1056.                         void *data, int *got_frame, AVPacket *avpkt)

  1057. {

  1058.     TiffContext *const s = avctx->priv_data;

  1059.     AVFrame *const p = data;

  1060.     ThreadFrame frame = { .f = data };

  1061.     unsigned off;

  1062.     int le, ret, plane, planes;

  1063.     int i, j, entries, stride;

  1064.     unsigned soff, ssize;

  1065.     uint8_t *dst;

  1066.     GetByteContext stripsizes;

  1067.     GetByteContext stripdata;

  1068. 

  1069.     bytestream2_init(&s->gb, avpkt->data, avpkt->size);

  1070. 

  1071.     // parse image header

  1072.     if ((ret = ff_tdecode_header(&s->gb, &le, &off))) {

  1073.         av_log(avctx, AV_LOG_ERROR, "Invalid TIFF header\n");

  1074.         return ret;

  1075.     } else if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {

  1076.         av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");

  1077.         return AVERROR_INVALIDDATA;

  1078.     }

  1079.     s->le          = le;

  1080.     // TIFF_BPP is not a required tag and defaults to 1

  1081.     s->bppcount    = s->bpp = 1;

  1082.     s->photometric = TIFF_PHOTOMETRIC_NONE;

  1083.     s->compr       = TIFF_RAW;

  1084.     s->fill_order  = 0;

  1085.     free_geotags(s);

  1086. 

  1087.     // Reset these offsets so we can tell if they were set this frame

  1088.     s->stripsizesoff = s->strippos = 0;

  1089.     /* parse image file directory */

  1090.     bytestream2_seek(&s->gb, off, SEEK_SET);

  1091.     entries = ff_tget_short(&s->gb, le);

  1092.     if (bytestream2_get_bytes_left(&s->gb) < entries * 12)

  1093.         return AVERROR_INVALIDDATA;

  1094.     for (i = 0; i < entries; i++) {

  1095.         if ((ret = tiff_decode_tag(s, p)) < 0)

  1096.             return ret;

  1097.     }

  1098. 

  1099.     for (i = 0; i<s->geotag_count; i++) {

  1100.         const char *keyname = get_geokey_name(s->geotags[i].key);

  1101.         if (!keyname) {

  1102.             av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);

  1103.             continue;

  1104.         }

  1105.         if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {

  1106.             av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);

  1107.             continue;

  1108.         }

  1109.         ret = av_dict_set(avpriv_frame_get_metadatap(p), keyname, s->geotags[i].val, 0);

  1110.         if (ret<0) {

  1111.             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);

  1112.             return ret;

  1113.         }

  1114.     }

  1115. 

  1116.     if (!s->strippos && !s->stripoff) {

  1117.         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");

  1118.         return AVERROR_INVALIDDATA;

  1119.     }

  1120.     /* now we have the data and may start decoding */

  1121.     if ((ret = init_image(s, &frame)) < 0)

  1122.         return ret;

  1123. 

  1124.     if (s->strips == 1 && !s->stripsize) {

  1125.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1126.         s->stripsize = avpkt->size - s->stripoff;

  1127.     }

  1128. 

  1129.     if (s->stripsizesoff) {

  1130.         if (s->stripsizesoff >= (unsigned)avpkt->size)

  1131.             return AVERROR_INVALIDDATA;

  1132.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,

  1133.                          avpkt->size - s->stripsizesoff);

  1134.     }

  1135.     if (s->strippos) {

  1136.         if (s->strippos >= (unsigned)avpkt->size)

  1137.             return AVERROR_INVALIDDATA;

  1138.         bytestream2_init(&stripdata, avpkt->data + s->strippos,

  1139.                          avpkt->size - s->strippos);

  1140.     }

  1141. 

  1142.     if (s->rps <= 0) {

  1143.         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);

  1144.         return AVERROR_INVALIDDATA;

  1145.     }

  1146. 

  1147.     planes = s->planar ? s->bppcount : 1;

  1148.     for (plane = 0; plane < planes; plane++) {

  1149.         stride = p->linesize[plane];

  1150.         dst    = p->data[plane];

  1151.     for (i = 0; i < s->height; i += s->rps) {

  1152.         if (s->stripsizesoff)

  1153.             ssize = ff_tget(&stripsizes, s->sstype, le);

  1154.         else

  1155.             ssize = s->stripsize;

  1156. 

  1157.         if (s->strippos)

  1158.             soff = ff_tget(&stripdata, s->sot, le);

  1159.         else

  1160.             soff = s->stripoff;

  1161. 

  1162.         if (soff > avpkt->size || ssize > avpkt->size - soff) {

  1163.             av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1164.             return AVERROR_INVALIDDATA;

  1165.         }

  1166.         if ((ret = tiff_unpack_strip(s, p, dst, stride, avpkt->data + soff, ssize, i,

  1167.                                      FFMIN(s->rps, s->height - i))) < 0) {

  1168.             if (avctx->err_recognition & AV_EF_EXPLODE)

  1169.                 return ret;

  1170.             break;

  1171.         }

  1172.         dst += s->rps * stride;

  1173.     }

  1174.     if (s->predictor == 2) {

  1175.         if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {

  1176.             av_log(s->avctx, AV_LOG_ERROR, "predictor == 2 with YUV is unsupported");

  1177.             return AVERROR_PATCHWELCOME;

  1178.         }

  1179.         dst   = p->data[plane];

  1180.         soff  = s->bpp >> 3;

  1181.         if (s->planar)

  1182.             soff  = FFMAX(soff / s->bppcount, 1);

  1183.         ssize = s->width * soff;

  1184.         if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1185.             s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||

  1186.             s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||

  1187.             s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {

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

  1189.                 for (j = soff; j < ssize; j += 2)

  1190.                     AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1191.                 dst += stride;

  1192.             }

  1193.         } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1194.                    s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||

  1195.                    s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||

  1196.                    s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {

  1197.             for (i = 0; i < s->height; i++) {

  1198.                 for (j = soff; j < ssize; j += 2)

  1199.                     AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1200.                 dst += stride;

  1201.             }

  1202.         } else {

  1203.             for (i = 0; i < s->height; i++) {

  1204.                 for (j = soff; j < ssize; j++)

  1205.                     dst[j] += dst[j - soff];

  1206.                 dst += stride;

  1207.             }

  1208.         }

  1209.     }

  1210. 

  1211.     if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {

  1212.         dst = p->data[plane];

  1213.         for (i = 0; i < s->height; i++) {

  1214.             for (j = 0; j < p->linesize[plane]; j++)

  1215.                 dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];

  1216.             dst += stride;

  1217.         }

  1218.     }

  1219.     }

  1220. 

  1221.     if (s->planar && s->bppcount > 2) {

  1222.         FFSWAP(uint8_t*, p->data[0],     p->data[2]);

  1223.         FFSWAP(int,      p->linesize[0], p->linesize[2]);

  1224.         FFSWAP(uint8_t*, p->data[0],     p->data[1]);

  1225.         FFSWAP(int,      p->linesize[0], p->linesize[1]);

  1226.     }

  1227. 

  1228.     *got_frame = 1;

  1229. 

  1230.     return avpkt->size;

  1231. }

  1232. 

  1233. static av_cold int tiff_init(AVCodecContext *avctx)

  1234. {

  1235.     TiffContext *s = avctx->priv_data;

  1236. 

  1237.     s->width  = 0;

  1238.     s->height = 0;

  1239.     s->subsampling[0] =

  1240.     s->subsampling[1] = 1;

  1241.     s->avctx  = avctx;

  1242.     ff_lzw_decode_open(&s->lzw);

  1243.     ff_ccitt_unpack_init();

  1244. 

  1245.     return 0;

  1246. }

  1247. 

  1248. static av_cold int tiff_end(AVCodecContext *avctx)

  1249. {

  1250.     TiffContext *const s = avctx->priv_data;

  1251. 

  1252.     free_geotags(s);

  1253. 

  1254.     ff_lzw_decode_close(&s->lzw);

  1255.     av_freep(&s->deinvert_buf);

  1256.     return 0;

  1257. }

  1258. 

  1259. AVCodec ff_tiff_decoder = {

  1260.     .name           = "tiff",

  1261.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1262.     .type           = AVMEDIA_TYPE_VIDEO,

  1263.     .id             = AV_CODEC_ID_TIFF,

  1264.     .priv_data_size = sizeof(TiffContext),

  1265.     .init           = tiff_init,

  1266.     .close          = tiff_end,

  1267.     .decode         = decode_frame,

  1268.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(tiff_init),

  1269.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,

  1270. };