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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. #if CONFIG_LZMA

  32. #define LZMA_API_STATIC

  33. #include <lzma.h>

  34. #endif

  35. 

  36. #include "libavutil/attributes.h"

  37. #include "libavutil/avstring.h"

  38. #include "libavutil/intreadwrite.h"

  39. #include "libavutil/imgutils.h"

  40. #include "avcodec.h"

  41. #include "bytestream.h"

  42. #include "faxcompr.h"

  43. #include "internal.h"

  44. #include "lzw.h"

  45. #include "mathops.h"

  46. #include "tiff.h"

  47. #include "tiff_data.h"

  48. #include "thread.h"

  49. 

  50. typedef struct TiffContext {

  51.     AVCodecContext *avctx;

  52.     GetByteContext gb;

  53. 

  54.     int width, height;

  55.     unsigned int bpp, bppcount;

  56.     uint32_t palette[256];

  57.     int palette_is_set;

  58.     int le;

  59.     enum TiffCompr compr;

  60.     enum TiffPhotometric photometric;

  61.     int planar;

  62.     int subsampling[2];

  63.     int fax_opts;

  64.     int predictor;

  65.     int fill_order;

  66.     uint32_t res[4];

  67. 

  68.     int strips, rps, sstype;

  69.     int sot;

  70.     int stripsizesoff, stripsize, stripoff, strippos;

  71.     LZWState *lzw;

  72. 

  73.     uint8_t *deinvert_buf;

  74.     int deinvert_buf_size;

  75.     uint8_t *yuv_line;

  76.     unsigned int yuv_line_size;

  77.     uint8_t *fax_buffer;

  78.     unsigned int fax_buffer_size;

  79. 

  80.     int geotag_count;

  81.     TiffGeoTag *geotags;

  82. } TiffContext;

  83. 

  84. static void free_geotags(TiffContext *const s)

  85. {

  86.     int i;

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

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

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

  90.     }

  91.     av_freep(&s->geotags);

  92.     s->geotag_count = 0;

  93. }

  94. 

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

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

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

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

  99. 

  100. static const char *get_geokey_name(int key)

  101. {

  102.     RET_GEOKEY(VERT, vert, name);

  103.     RET_GEOKEY(PROJ, proj, name);

  104.     RET_GEOKEY(GEOG, geog, name);

  105.     RET_GEOKEY(CONF, conf, name);

  106. 

  107.     return NULL;

  108. }

  109. 

  110. static int get_geokey_type(int key)

  111. {

  112.     RET_GEOKEY(VERT, vert, type);

  113.     RET_GEOKEY(PROJ, proj, type);

  114.     RET_GEOKEY(GEOG, geog, type);

  115.     RET_GEOKEY(CONF, conf, type);

  116. 

  117.     return AVERROR_INVALIDDATA;

  118. }

  119. 

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

  121. {

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

  123. }

  124. 

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

  126. {

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

  128.     if(r)

  129.         return r->name;

  130. 

  131.     return NULL;

  132. }

  133. 

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

  135. {

  136.     char *ap;

  137. 

  138.     if (val == TIFF_GEO_KEY_UNDEFINED)

  139.         return av_strdup("undefined");

  140.     if (val == TIFF_GEO_KEY_USER_DEFINED)

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

  142. 

  143. #define RET_GEOKEY_VAL(TYPE, array)\

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

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

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

  147. 

  148.     switch (key) {

  149.     case TIFF_GT_MODEL_TYPE_GEOKEY:

  150.         RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);

  151.         break;

  152.     case TIFF_GT_RASTER_TYPE_GEOKEY:

  153.         RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);

  154.         break;

  155.     case TIFF_GEOG_LINEAR_UNITS_GEOKEY:

  156.     case TIFF_PROJ_LINEAR_UNITS_GEOKEY:

  157.     case TIFF_VERTICAL_UNITS_GEOKEY:

  158.         RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);

  159.         break;

  160.     case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:

  161.     case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:

  162.         RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);

  163.         break;

  164.     case TIFF_GEOGRAPHIC_TYPE_GEOKEY:

  165.         RET_GEOKEY_VAL(GCS_TYPE, gcs_type);

  166.         RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);

  167.         break;

  168.     case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:

  169.         RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);

  170.         RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);

  171.         break;

  172.     case TIFF_GEOG_ELLIPSOID_GEOKEY:

  173.         RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);

  174.         break;

  175.     case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:

  176.         RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);

  177.         break;

  178.     case TIFF_PROJECTED_CS_TYPE_GEOKEY:

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

  180.         if(ap) return ap;

  181.         break;

  182.     case TIFF_PROJECTION_GEOKEY:

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

  184.         if(ap) return ap;

  185.         break;

  186.     case TIFF_PROJ_COORD_TRANS_GEOKEY:

  187.         RET_GEOKEY_VAL(COORD_TRANS, coord_trans);

  188.         break;

  189.     case TIFF_VERTICAL_CS_TYPE_GEOKEY:

  190.         RET_GEOKEY_VAL(VERT_CS, vert_cs);

  191.         RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);

  192.         break;

  193. 

  194.     }

  195. 

  196.     ap = av_malloc(14);

  197.     if (ap)

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

  199.     return ap;

  200. }

  201. 

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

  203. {

  204.     int i;

  205.     char *ap, *ap0;

  206.     uint64_t component_len;

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

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

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

  210.         return NULL;

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

  212.     if (!ap)

  213.         return NULL;

  214.     ap0   = ap;

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

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

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

  218.         if(l >= component_len) {

  219.             av_free(ap0);

  220.             return NULL;

  221.         }

  222.         ap += l;

  223.     }

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

  225.     return ap0;

  226. }

  227. 

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

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

  230. {

  231.     switch(type) {

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

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

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

  235.     default         : return AVERROR_INVALIDDATA;

  236.     };

  237. }

  238. 

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

  240.                                              int usePtr, const uint8_t *src,

  241.                                              uint8_t c, int width, int offset)

  242. {

  243.     switch (bpp) {

  244.     case 1:

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

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

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

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

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

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

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

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

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

  254.         }

  255.         break;

  256.     case 2:

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

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

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

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

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

  262.         }

  263.         break;

  264.     case 4:

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

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

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

  268.         }

  269.         break;

  270.     default:

  271.         if (usePtr) {

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

  273.         } else {

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

  275.         }

  276.     }

  277. }

  278. 

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

  280. {

  281.     int i;

  282. 

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

  284.     if (!s->deinvert_buf)

  285.         return AVERROR(ENOMEM);

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

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

  288. 

  289.     return 0;

  290. }

  291. 

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

  293.                        const uint8_t *src, int lnum)

  294. {

  295.     int i, j, k;

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

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

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

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

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

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

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

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

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

  305.             *pu++ = *src++;

  306.             *pv++ = *src++;

  307.         }

  308.     }else{

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

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

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

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

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

  314.             *pu++ = *src++;

  315.             *pv++ = *src++;

  316.         }

  317.     }

  318. }

  319. 

  320. #if CONFIG_ZLIB

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

  322.                            int size)

  323. {

  324.     z_stream zstream = { 0 };

  325.     int zret;

  326. 

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

  328.     zstream.avail_in  = size;

  329.     zstream.next_out  = dst;

  330.     zstream.avail_out = *len;

  331.     zret              = inflateInit(&zstream);

  332.     if (zret != Z_OK) {

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

  334.         return zret;

  335.     }

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

  337.     inflateEnd(&zstream);

  338.     *len = zstream.total_out;

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

  340. }

  341. 

  342. static int tiff_unpack_zlib(TiffContext *s, AVFrame *p, uint8_t *dst, int stride,

  343.                             const uint8_t *src, int size, int width, int lines,

  344.                             int strip_start, int is_yuv)

  345. {

  346.     uint8_t *zbuf;

  347.     unsigned long outlen;

  348.     int ret, line;

  349.     outlen = width * lines;

  350.     zbuf   = av_malloc(outlen);

  351.     if (!zbuf)

  352.         return AVERROR(ENOMEM);

  353.     if (s->fill_order) {

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

  355.             av_free(zbuf);

  356.             return ret;

  357.         }

  358.         src = s->deinvert_buf;

  359.     }

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

  361.     if (ret != Z_OK) {

  362.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  365.         av_free(zbuf);

  366.         return AVERROR_UNKNOWN;

  367.     }

  368.     src = zbuf;

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

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

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

  372.         } else {

  373.             memcpy(dst, src, width);

  374.         }

  375.         if (is_yuv) {

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

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

  378.         }

  379.         dst += stride;

  380.         src += width;

  381.     }

  382.     av_free(zbuf);

  383.     return 0;

  384. }

  385. #endif

  386. 

  387. #if CONFIG_LZMA

  388. static int tiff_uncompress_lzma(uint8_t *dst, uint64_t *len, const uint8_t *src,

  389.                                 int size)

  390. {

  391.     lzma_stream stream = LZMA_STREAM_INIT;

  392.     lzma_ret ret;

  393. 

  394.     stream.next_in   = (uint8_t *)src;

  395.     stream.avail_in  = size;

  396.     stream.next_out  = dst;

  397.     stream.avail_out = *len;

  398.     ret              = lzma_stream_decoder(&stream, UINT64_MAX, 0);

  399.     if (ret != LZMA_OK) {

  400.         av_log(NULL, AV_LOG_ERROR, "LZMA init error: %d\n", ret);

  401.         return ret;

  402.     }

  403.     ret = lzma_code(&stream, LZMA_RUN);

  404.     lzma_end(&stream);

  405.     *len = stream.total_out;

  406.     return ret == LZMA_STREAM_END ? LZMA_OK : ret;

  407. }

  408. 

  409. static int tiff_unpack_lzma(TiffContext *s, AVFrame *p, uint8_t *dst, int stride,

  410.                             const uint8_t *src, int size, int width, int lines,

  411.                             int strip_start, int is_yuv)

  412. {

  413.     uint64_t outlen = width * (uint64_t)lines;

  414.     int ret, line;

  415.     uint8_t *buf = av_malloc(outlen);

  416.     if (!buf)

  417.         return AVERROR(ENOMEM);

  418.     if (s->fill_order) {

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

  420.             av_free(buf);

  421.             return ret;

  422.         }

  423.         src = s->deinvert_buf;

  424.     }

  425.     ret = tiff_uncompress_lzma(buf, &outlen, src, size);

  426.     if (ret != LZMA_OK) {

  427.         av_log(s->avctx, AV_LOG_ERROR,

  428.                "Uncompressing failed (%"PRIu64" of %"PRIu64") with error %d\n", outlen,

  429.                (uint64_t)width * lines, ret);

  430.         av_free(buf);

  431.         return AVERROR_UNKNOWN;

  432.     }

  433.     src = buf;

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

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

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

  437.         } else {

  438.             memcpy(dst, src, width);

  439.         }

  440.         if (is_yuv) {

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

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

  443.         }

  444.         dst += stride;

  445.         src += width;

  446.     }

  447.     av_free(buf);

  448.     return 0;

  449. }

  450. #endif

  451. 

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

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

  454. {

  455.     int i, ret = 0;

  456.     int line;

  457.     uint8_t *src2;

  458. 

  459.     av_fast_padded_malloc(&s->fax_buffer, &s->fax_buffer_size, size);

  460.     src2 = s->fax_buffer;

  461. 

  462.     if (!src2) {

  463.         av_log(s->avctx, AV_LOG_ERROR,

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

  465.         return AVERROR(ENOMEM);

  466.     }

  467. 

  468.     if (!s->fill_order) {

  469.         memcpy(src2, src, size);

  470.     } else {

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

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

  473.     }

  474.     memset(src2 + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);

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

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

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

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

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

  480.             dst += stride;

  481.         }

  482.     return ret;

  483. }

  484. 

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

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

  487. {

  488.     PutByteContext pb;

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

  490.     const uint8_t *ssrc = src;

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

  492.     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(p->format);

  493.     int is_yuv = !(desc->flags & AV_PIX_FMT_FLAG_RGB) &&

  494.                  (desc->flags & AV_PIX_FMT_FLAG_PLANAR) &&

  495.                  desc->nb_components >= 3;

  496. 

  497.     if (s->planar)

  498.         width /= s->bppcount;

  499. 

  500.     if (size <= 0)

  501.         return AVERROR_INVALIDDATA;

  502. 

  503.     if (is_yuv) {

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

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

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

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

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

  509.             return AVERROR(ENOMEM);

  510.         }

  511.         dst = s->yuv_line;

  512.         stride = 0;

  513. 

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

  515.         width = width * s->subsampling[0] * s->subsampling[1] + 2*width;

  516.         av_assert0(width <= bytes_per_row);

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

  518.     }

  519. 

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

  521. #if CONFIG_ZLIB

  522.         return tiff_unpack_zlib(s, p, dst, stride, src, size, width, lines,

  523.                                 strip_start, is_yuv);

  524. #else

  525.         av_log(s->avctx, AV_LOG_ERROR,

  526.                "zlib support not enabled, "

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

  528.         return AVERROR(ENOSYS);

  529. #endif

  530.     }

  531.     if (s->compr == TIFF_LZMA) {

  532. #if CONFIG_LZMA

  533.         return tiff_unpack_lzma(s, p, dst, stride, src, size, width, lines,

  534.                                 strip_start, is_yuv);

  535. #else

  536.         av_log(s->avctx, AV_LOG_ERROR,

  537.                "LZMA support not enabled\n");

  538.         return AVERROR(ENOSYS);

  539. #endif

  540.     }

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

  542.         if (s->fill_order) {

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

  544.                 return ret;

  545.             ssrc = src = s->deinvert_buf;

  546.         }

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

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

  549.         }

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

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

  552.             return ret;

  553.         }

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

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

  556.             if (pixels < width) {

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

  558.                        pixels, width);

  559.                 return AVERROR_INVALIDDATA;

  560.             }

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

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

  563.             if (is_yuv) {

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

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

  566.             }

  567.             dst += stride;

  568.         }

  569.         return 0;

  570.     }

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

  572.         s->compr == TIFF_G3        ||

  573.         s->compr == TIFF_G4) {

  574.         if (is_yuv || p->format == AV_PIX_FMT_GRAY12)

  575.             return AVERROR_INVALIDDATA;

  576. 

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

  578.     }

  579. 

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

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

  582. 

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

  584.         if (src - ssrc > size) {

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

  586.             return AVERROR_INVALIDDATA;

  587.         }

  588. 

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

  590.             break;

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

  592.         switch (s->compr) {

  593.         case TIFF_RAW:

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

  595.                 return AVERROR_INVALIDDATA;

  596. 

  597.             if (!s->fill_order) {

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

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

  600.             } else {

  601.                 int i;

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

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

  604.             }

  605.             src += width;

  606.             break;

  607.         case TIFF_PACKBITS:

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

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

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

  611.                     return AVERROR_INVALIDDATA;

  612.                 }

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

  614.                 if (code >= 0) {

  615.                     code++;

  616.                     if (pixels + code > width ||

  617.                         ssrc + size - src < code) {

  618.                         av_log(s->avctx, AV_LOG_ERROR,

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

  620.                         return AVERROR_INVALIDDATA;

  621.                     }

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

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

  624.                     src    += code;

  625.                     pixels += code;

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

  627.                     code = (-code) + 1;

  628.                     if (pixels + code > width) {

  629.                         av_log(s->avctx, AV_LOG_ERROR,

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

  631.                         return AVERROR_INVALIDDATA;

  632.                     }

  633.                     c = *src++;

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

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

  636.                     pixels += code;

  637.                 }

  638.             }

  639.             if (s->fill_order) {

  640.                 int i;

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

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

  643.             }

  644.             break;

  645.         }

  646.         if (is_yuv) {

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

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

  649.         }

  650.         dst += stride;

  651.     }

  652.     return 0;

  653. }

  654. 

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

  656. {

  657.     int ret;

  658.     int create_gray_palette = 0;

  659. 

  660.     // make sure there is no aliasing in the following switch

  661.     if (s->bpp >= 100 || s->bppcount >= 10) {

  662.         av_log(s->avctx, AV_LOG_ERROR,

  663.                "Unsupported image parameters: bpp=%d, bppcount=%d\n",

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

  665.         return AVERROR_INVALIDDATA;

  666.     }

  667. 

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

  669.     case 11:

  670.         if (!s->palette_is_set) {

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

  672.             break;

  673.         }

  674.     case 21:

  675.     case 41:

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

  677.         if (!s->palette_is_set) {

  678.             create_gray_palette = 1;

  679.         }

  680.         break;

  681.     case 81:

  682.         s->avctx->pix_fmt = s->palette_is_set ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8;

  683.         break;

  684.     case 243:

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

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

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

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

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

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

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

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

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

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

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

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

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

  698.             } else {

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

  700.                 return AVERROR_PATCHWELCOME;

  701.             }

  702.         } else

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

  704.         break;

  705.     case 161:

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

  707.         break;

  708.     case 162:

  709.         s->avctx->pix_fmt = AV_PIX_FMT_YA8;

  710.         break;

  711.     case 322:

  712.         s->avctx->pix_fmt = s->le ? AV_PIX_FMT_YA16LE : AV_PIX_FMT_YA16BE;

  713.         break;

  714.     case 324:

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

  716.         break;

  717.     case 483:

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

  719.         break;

  720.     case 644:

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

  722.         break;

  723.     case 1243:

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

  725.         break;

  726.     case 1324:

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

  728.         break;

  729.     case 1483:

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

  731.         break;

  732.     case 1644:

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

  734.         break;

  735.     default:

  736.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  739.         return AVERROR_INVALIDDATA;

  740.     }

  741. 

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

  743.         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);

  744.         if((desc->flags & AV_PIX_FMT_FLAG_RGB) ||

  745.            !(desc->flags & AV_PIX_FMT_FLAG_PLANAR) ||

  746.            desc->nb_components < 3) {

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

  748.             return AVERROR_INVALIDDATA;

  749.         }

  750.     }

  751. 

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

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

  754.         if (ret < 0)

  755.             return ret;

  756.     }

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

  758.         return ret;

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

  760.         if (!create_gray_palette)

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

  762.         else {

  763.             /* make default grayscale pal */

  764.             int i;

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

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

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

  768.         }

  769.     }

  770.     return 0;

  771. }

  772. 

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

  774. {

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

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

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

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

  779.         uint64_t num = s->res[2] * (uint64_t)s->res[1];

  780.         uint64_t den = s->res[0] * (uint64_t)s->res[3];

  781.         if (num > INT64_MAX || den > INT64_MAX) {

  782.             num = num >> 1;

  783.             den = den >> 1;

  784.         }

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

  786.                   num, den, INT32_MAX);

  787.         if (!s->avctx->sample_aspect_ratio.den)

  788.             s->avctx->sample_aspect_ratio = (AVRational) {0, 1};

  789.     }

  790. }

  791. 

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

  793. {

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

  795.     int i, start;

  796.     int pos;

  797.     int ret;

  798.     double *dp;

  799. 

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

  801.     if (ret < 0) {

  802.         goto end;

  803.     }

  804. 

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

  806.     if (count == 1) {

  807.         switch (type) {

  808.         case TIFF_BYTE:

  809.         case TIFF_SHORT:

  810.         case TIFF_LONG:

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

  812.             break;

  813.         case TIFF_RATIONAL:

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

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

  816.             break;

  817.         case TIFF_STRING:

  818.             if (count <= 4) {

  819.                 break;

  820.             }

  821.         default:

  822.             value = UINT_MAX;

  823.         }

  824.     }

  825. 

  826.     switch (tag) {

  827.     case TIFF_WIDTH:

  828.         s->width = value;

  829.         break;

  830.     case TIFF_HEIGHT:

  831.         s->height = value;

  832.         break;

  833.     case TIFF_BPP:

  834.         if (count > 4U) {

  835.             av_log(s->avctx, AV_LOG_ERROR,

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

  837.                    value, count);

  838.             return AVERROR_INVALIDDATA;

  839.         }

  840.         s->bppcount = count;

  841.         if (count == 1)

  842.             s->bpp = value;

  843.         else {

  844.             switch (type) {

  845.             case TIFF_BYTE:

  846.             case TIFF_SHORT:

  847.             case TIFF_LONG:

  848.                 s->bpp = 0;

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

  850.                     return AVERROR_INVALIDDATA;

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

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

  853.                 break;

  854.             default:

  855.                 s->bpp = -1;

  856.             }

  857.         }

  858.         break;

  859.     case TIFF_SAMPLES_PER_PIXEL:

  860.         if (count != 1) {

  861.             av_log(s->avctx, AV_LOG_ERROR,

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

  863.             return AVERROR_INVALIDDATA;

  864.         }

  865.         if (value > 4U) {

  866.             av_log(s->avctx, AV_LOG_ERROR,

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

  868.             return AVERROR_INVALIDDATA;

  869.         }

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

  871.             s->bpp *= value;

  872.         s->bppcount = value;

  873.         break;

  874.     case TIFF_COMPR:

  875.         s->compr     = value;

  876.         av_log(s->avctx, AV_LOG_DEBUG, "compression: %d\n", s->compr);

  877.         s->predictor = 0;

  878.         switch (s->compr) {

  879.         case TIFF_RAW:

  880.         case TIFF_PACKBITS:

  881.         case TIFF_LZW:

  882.         case TIFF_CCITT_RLE:

  883.             break;

  884.         case TIFF_G3:

  885.         case TIFF_G4:

  886.             s->fax_opts = 0;

  887.             break;

  888.         case TIFF_DEFLATE:

  889.         case TIFF_ADOBE_DEFLATE:

  890. #if CONFIG_ZLIB

  891.             break;

  892. #else

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

  894.             return AVERROR(ENOSYS);

  895. #endif

  896.         case TIFF_JPEG:

  897.         case TIFF_NEWJPEG:

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

  899.             return AVERROR_PATCHWELCOME;

  900.         case TIFF_LZMA:

  901. #if CONFIG_LZMA

  902.             break;

  903. #else

  904.             av_log(s->avctx, AV_LOG_ERROR, "LZMA not compiled in\n");

  905.             return AVERROR(ENOSYS);

  906. #endif

  907.         default:

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

  909.                    s->compr);

  910.             return AVERROR_INVALIDDATA;

  911.         }

  912.         break;

  913.     case TIFF_ROWSPERSTRIP:

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

  915.             value = s->height;

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

  917.         break;

  918.     case TIFF_STRIP_OFFS:

  919.         if (count == 1) {

  920.             if (value > INT_MAX) {

  921.                 av_log(s->avctx, AV_LOG_ERROR,

  922.                     "strippos %u too large\n", value);

  923.                 return AVERROR_INVALIDDATA;

  924.             }

  925.             s->strippos = 0;

  926.             s->stripoff = value;

  927.         } else

  928.             s->strippos = off;

  929.         s->strips = count;

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

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

  932.         s->sot = type;

  933.         break;

  934.     case TIFF_STRIP_SIZE:

  935.         if (count == 1) {

  936.             if (value > INT_MAX) {

  937.                 av_log(s->avctx, AV_LOG_ERROR,

  938.                     "stripsize %u too large\n", value);

  939.                 return AVERROR_INVALIDDATA;

  940.             }

  941.             s->stripsizesoff = 0;

  942.             s->stripsize     = value;

  943.             s->strips        = 1;

  944.         } else {

  945.             s->stripsizesoff = off;

  946.         }

  947.         s->strips = count;

  948.         s->sstype = type;

  949.         break;

  950.     case TIFF_XRES:

  951.     case TIFF_YRES:

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

  953.         break;

  954.     case TIFF_TILE_BYTE_COUNTS:

  955.     case TIFF_TILE_LENGTH:

  956.     case TIFF_TILE_OFFSETS:

  957.     case TIFF_TILE_WIDTH:

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

  959.         return AVERROR_PATCHWELCOME;

  960.         break;

  961.     case TIFF_PREDICTOR:

  962.         s->predictor = value;

  963.         break;

  964.     case TIFF_PHOTOMETRIC:

  965.         switch (value) {

  966.         case TIFF_PHOTOMETRIC_WHITE_IS_ZERO:

  967.         case TIFF_PHOTOMETRIC_BLACK_IS_ZERO:

  968.         case TIFF_PHOTOMETRIC_RGB:

  969.         case TIFF_PHOTOMETRIC_PALETTE:

  970.         case TIFF_PHOTOMETRIC_YCBCR:

  971.             s->photometric = value;

  972.             break;

  973.         case TIFF_PHOTOMETRIC_ALPHA_MASK:

  974.         case TIFF_PHOTOMETRIC_SEPARATED:

  975.         case TIFF_PHOTOMETRIC_CIE_LAB:

  976.         case TIFF_PHOTOMETRIC_ICC_LAB:

  977.         case TIFF_PHOTOMETRIC_ITU_LAB:

  978.         case TIFF_PHOTOMETRIC_CFA:

  979.         case TIFF_PHOTOMETRIC_LOG_L:

  980.         case TIFF_PHOTOMETRIC_LOG_LUV:

  981.         case TIFF_PHOTOMETRIC_LINEAR_RAW:

  982.             avpriv_report_missing_feature(s->avctx,

  983.                                           "PhotometricInterpretation 0x%04X",

  984.                                           value);

  985.             return AVERROR_PATCHWELCOME;

  986.         default:

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

  988.                    "unknown\n", value);

  989.             return AVERROR_INVALIDDATA;

  990.         }

  991.         break;

  992.     case TIFF_FILL_ORDER:

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

  994.             av_log(s->avctx, AV_LOG_ERROR,

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

  996.             value = 1;

  997.         }

  998.         s->fill_order = value - 1;

  999.         break;

  1000.     case TIFF_PAL: {

  1001.         GetByteContext pal_gb[3];

  1002.         off = type_sizes[type];

  1003.         if (count / 3 > 256 ||

  1004.             bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)

  1005.             return AVERROR_INVALIDDATA;

  1006. 

  1007.         pal_gb[0] = pal_gb[1] = pal_gb[2] = s->gb;

  1008.         bytestream2_skip(&pal_gb[1], count / 3 * off);

  1009.         bytestream2_skip(&pal_gb[2], count / 3 * off * 2);

  1010. 

  1011.         off = (type_sizes[type] - 1) << 3;

  1012.         if (off > 31U) {

  1013.             av_log(s->avctx, AV_LOG_ERROR, "palette shift %d is out of range\n", off);

  1014.             return AVERROR_INVALIDDATA;

  1015.         }

  1016. 

  1017.         for (i = 0; i < count / 3; i++) {

  1018.             uint32_t p = 0xFF000000;

  1019.             p |= (ff_tget(&pal_gb[0], type, s->le) >> off) << 16;

  1020.             p |= (ff_tget(&pal_gb[1], type, s->le) >> off) << 8;

  1021.             p |=  ff_tget(&pal_gb[2], type, s->le) >> off;

  1022.             s->palette[i] = p;

  1023.         }

  1024.         s->palette_is_set = 1;

  1025.         break;

  1026.     }

  1027.     case TIFF_PLANAR:

  1028.         s->planar = value == 2;

  1029.         break;

  1030.     case TIFF_YCBCR_SUBSAMPLING:

  1031.         if (count != 2) {

  1032.             av_log(s->avctx, AV_LOG_ERROR, "subsample count invalid\n");

  1033.             return AVERROR_INVALIDDATA;

  1034.         }

  1035.         for (i = 0; i < count; i++) {

  1036.             s->subsampling[i] = ff_tget(&s->gb, type, s->le);

  1037.             if (s->subsampling[i] <= 0) {

  1038.                 av_log(s->avctx, AV_LOG_ERROR, "subsampling %d is invalid\n", s->subsampling[i]);

  1039.                 s->subsampling[i] = 1;

  1040.                 return AVERROR_INVALIDDATA;

  1041.             }

  1042.         }

  1043.         break;

  1044.     case TIFF_T4OPTIONS:

  1045.         if (s->compr == TIFF_G3)

  1046.             s->fax_opts = value;

  1047.         break;

  1048.     case TIFF_T6OPTIONS:

  1049.         if (s->compr == TIFF_G4)

  1050.             s->fax_opts = value;

  1051.         break;

  1052. #define ADD_METADATA(count, name, sep)\

  1053.     if ((ret = add_metadata(count, type, name, sep, s, frame)) < 0) {\

  1054.         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\

  1055.         goto end;\

  1056.     }

  1057.     case TIFF_MODEL_PIXEL_SCALE:

  1058.         ADD_METADATA(count, "ModelPixelScaleTag", NULL);

  1059.         break;

  1060.     case TIFF_MODEL_TRANSFORMATION:

  1061.         ADD_METADATA(count, "ModelTransformationTag", NULL);

  1062.         break;

  1063.     case TIFF_MODEL_TIEPOINT:

  1064.         ADD_METADATA(count, "ModelTiepointTag", NULL);

  1065.         break;

  1066.     case TIFF_GEO_KEY_DIRECTORY:

  1067.         if (s->geotag_count) {

  1068.             avpriv_request_sample(s->avctx, "Multiple geo key directories\n");

  1069.             return AVERROR_INVALIDDATA;

  1070.         }

  1071.         ADD_METADATA(1, "GeoTIFF_Version", NULL);

  1072.         ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");

  1073.         s->geotag_count   = ff_tget_short(&s->gb, s->le);

  1074.         if (s->geotag_count > count / 4 - 1) {

  1075.             s->geotag_count = count / 4 - 1;

  1076.             av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n");

  1077.         }

  1078.         if (   bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4

  1079.             || s->geotag_count == 0) {

  1080.             s->geotag_count = 0;

  1081.             return -1;

  1082.         }

  1083.         s->geotags = av_mallocz_array(s->geotag_count, sizeof(TiffGeoTag));

  1084.         if (!s->geotags) {

  1085.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1086.             s->geotag_count = 0;

  1087.             goto end;

  1088.         }

  1089.         for (i = 0; i < s->geotag_count; i++) {

  1090.             s->geotags[i].key    = ff_tget_short(&s->gb, s->le);

  1091.             s->geotags[i].type   = ff_tget_short(&s->gb, s->le);

  1092.             s->geotags[i].count  = ff_tget_short(&s->gb, s->le);

  1093. 

  1094.             if (!s->geotags[i].type)

  1095.                 s->geotags[i].val  = get_geokey_val(s->geotags[i].key, ff_tget_short(&s->gb, s->le));

  1096.             else

  1097.                 s->geotags[i].offset = ff_tget_short(&s->gb, s->le);

  1098.         }

  1099.         break;

  1100.     case TIFF_GEO_DOUBLE_PARAMS:

  1101.         if (count >= INT_MAX / sizeof(int64_t))

  1102.             return AVERROR_INVALIDDATA;

  1103.         if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))

  1104.             return AVERROR_INVALIDDATA;

  1105.         dp = av_malloc_array(count, sizeof(double));

  1106.         if (!dp) {

  1107.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1108.             goto end;

  1109.         }

  1110.         for (i = 0; i < count; i++)

  1111.             dp[i] = ff_tget_double(&s->gb, s->le);

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

  1113.             if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) {

  1114.                 if (s->geotags[i].count == 0

  1115.                     || s->geotags[i].offset + s->geotags[i].count > count) {

  1116.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  1117.                 } else if (s->geotags[i].val) {

  1118.                     av_log(s->avctx, AV_LOG_WARNING, "Duplicate GeoTIFF key %d\n", s->geotags[i].key);

  1119.                 } else {

  1120.                     char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");

  1121.                     if (!ap) {

  1122.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1123.                         av_freep(&dp);

  1124.                         return AVERROR(ENOMEM);

  1125.                     }

  1126.                     s->geotags[i].val = ap;

  1127.                 }

  1128.             }

  1129.         }

  1130.         av_freep(&dp);

  1131.         break;

  1132.     case TIFF_GEO_ASCII_PARAMS:

  1133.         pos = bytestream2_tell(&s->gb);

  1134.         for (i = 0; i < s->geotag_count; i++) {

  1135.             if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) {

  1136.                 if (s->geotags[i].count == 0

  1137.                     || s->geotags[i].offset +  s->geotags[i].count > count) {

  1138.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  1139.                 } else {

  1140.                     char *ap;

  1141. 

  1142.                     bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);

  1143.                     if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)

  1144.                         return AVERROR_INVALIDDATA;

  1145.                     if (s->geotags[i].val)

  1146.                         return AVERROR_INVALIDDATA;

  1147.                     ap = av_malloc(s->geotags[i].count);

  1148.                     if (!ap) {

  1149.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1150.                         return AVERROR(ENOMEM);

  1151.                     }

  1152.                     bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);

  1153.                     ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte

  1154.                     s->geotags[i].val = ap;

  1155.                 }

  1156.             }

  1157.         }

  1158.         break;

  1159.     case TIFF_ARTIST:

  1160.         ADD_METADATA(count, "artist", NULL);

  1161.         break;

  1162.     case TIFF_COPYRIGHT:

  1163.         ADD_METADATA(count, "copyright", NULL);

  1164.         break;

  1165.     case TIFF_DATE:

  1166.         ADD_METADATA(count, "date", NULL);

  1167.         break;

  1168.     case TIFF_DOCUMENT_NAME:

  1169.         ADD_METADATA(count, "document_name", NULL);

  1170.         break;

  1171.     case TIFF_HOST_COMPUTER:

  1172.         ADD_METADATA(count, "computer", NULL);

  1173.         break;

  1174.     case TIFF_IMAGE_DESCRIPTION:

  1175.         ADD_METADATA(count, "description", NULL);

  1176.         break;

  1177.     case TIFF_MAKE:

  1178.         ADD_METADATA(count, "make", NULL);

  1179.         break;

  1180.     case TIFF_MODEL:

  1181.         ADD_METADATA(count, "model", NULL);

  1182.         break;

  1183.     case TIFF_PAGE_NAME:

  1184.         ADD_METADATA(count, "page_name", NULL);

  1185.         break;

  1186.     case TIFF_PAGE_NUMBER:

  1187.         ADD_METADATA(count, "page_number", " / ");

  1188.         break;

  1189.     case TIFF_SOFTWARE_NAME:

  1190.         ADD_METADATA(count, "software", NULL);

  1191.         break;

  1192.     default:

  1193.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  1194.             av_log(s->avctx, AV_LOG_ERROR,

  1195.                    "Unknown or unsupported tag %d/0X%0X\n",

  1196.                    tag, tag);

  1197.             return AVERROR_INVALIDDATA;

  1198.         }

  1199.     }

  1200. end:

  1201.     if (s->bpp > 64U) {

  1202.         av_log(s->avctx, AV_LOG_ERROR,

  1203.                 "This format is not supported (bpp=%d, %d components)\n",

  1204.                 s->bpp, count);

  1205.         s->bpp = 0;

  1206.         return AVERROR_INVALIDDATA;

  1207.     }

  1208.     bytestream2_seek(&s->gb, start, SEEK_SET);

  1209.     return 0;

  1210. }

  1211. 

  1212. static int decode_frame(AVCodecContext *avctx,

  1213.                         void *data, int *got_frame, AVPacket *avpkt)

  1214. {

  1215.     TiffContext *const s = avctx->priv_data;

  1216.     AVFrame *const p = data;

  1217.     ThreadFrame frame = { .f = data };

  1218.     unsigned off;

  1219.     int le, ret, plane, planes;

  1220.     int i, j, entries, stride;

  1221.     unsigned soff, ssize;

  1222.     uint8_t *dst;

  1223.     GetByteContext stripsizes;

  1224.     GetByteContext stripdata;

  1225. 

  1226.     bytestream2_init(&s->gb, avpkt->data, avpkt->size);

  1227. 

  1228.     // parse image header

  1229.     if ((ret = ff_tdecode_header(&s->gb, &le, &off))) {

  1230.         av_log(avctx, AV_LOG_ERROR, "Invalid TIFF header\n");

  1231.         return ret;

  1232.     } else if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {

  1233.         av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");

  1234.         return AVERROR_INVALIDDATA;

  1235.     }

  1236.     s->le          = le;

  1237.     // TIFF_BPP is not a required tag and defaults to 1

  1238.     s->bppcount    = s->bpp = 1;

  1239.     s->photometric = TIFF_PHOTOMETRIC_NONE;

  1240.     s->compr       = TIFF_RAW;

  1241.     s->fill_order  = 0;

  1242.     free_geotags(s);

  1243. 

  1244.     // Reset these offsets so we can tell if they were set this frame

  1245.     s->stripsizesoff = s->strippos = 0;

  1246.     /* parse image file directory */

  1247.     bytestream2_seek(&s->gb, off, SEEK_SET);

  1248.     entries = ff_tget_short(&s->gb, le);

  1249.     if (bytestream2_get_bytes_left(&s->gb) < entries * 12)

  1250.         return AVERROR_INVALIDDATA;

  1251.     for (i = 0; i < entries; i++) {

  1252.         if ((ret = tiff_decode_tag(s, p)) < 0)

  1253.             return ret;

  1254.     }

  1255. 

  1256.     for (i = 0; i<s->geotag_count; i++) {

  1257.         const char *keyname = get_geokey_name(s->geotags[i].key);

  1258.         if (!keyname) {

  1259.             av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);

  1260.             continue;

  1261.         }

  1262.         if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {

  1263.             av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);

  1264.             continue;

  1265.         }

  1266.         ret = av_dict_set(&p->metadata, keyname, s->geotags[i].val, 0);

  1267.         if (ret<0) {

  1268.             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);

  1269.             return ret;

  1270.         }

  1271.     }

  1272. 

  1273.     if (!s->strippos && !s->stripoff) {

  1274.         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");

  1275.         return AVERROR_INVALIDDATA;

  1276.     }

  1277.     /* now we have the data and may start decoding */

  1278.     if ((ret = init_image(s, &frame)) < 0)

  1279.         return ret;

  1280. 

  1281.     if (s->strips == 1 && !s->stripsize) {

  1282.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1283.         s->stripsize = avpkt->size - s->stripoff;

  1284.     }

  1285. 

  1286.     if (s->stripsizesoff) {

  1287.         if (s->stripsizesoff >= (unsigned)avpkt->size)

  1288.             return AVERROR_INVALIDDATA;

  1289.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,

  1290.                          avpkt->size - s->stripsizesoff);

  1291.     }

  1292.     if (s->strippos) {

  1293.         if (s->strippos >= (unsigned)avpkt->size)

  1294.             return AVERROR_INVALIDDATA;

  1295.         bytestream2_init(&stripdata, avpkt->data + s->strippos,

  1296.                          avpkt->size - s->strippos);

  1297.     }

  1298. 

  1299.     if (s->rps <= 0 || s->rps % s->subsampling[1]) {

  1300.         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);

  1301.         return AVERROR_INVALIDDATA;

  1302.     }

  1303. 

  1304.     planes = s->planar ? s->bppcount : 1;

  1305.     for (plane = 0; plane < planes; plane++) {

  1306.         int remaining = avpkt->size;

  1307.         int decoded_height;

  1308.         stride = p->linesize[plane];

  1309.         dst = p->data[plane];

  1310.         for (i = 0; i < s->height; i += s->rps) {

  1311.             if (i)

  1312.                 dst += s->rps * stride;

  1313.             if (s->stripsizesoff)

  1314.                 ssize = ff_tget(&stripsizes, s->sstype, le);

  1315.             else

  1316.                 ssize = s->stripsize;

  1317. 

  1318.             if (s->strippos)

  1319.                 soff = ff_tget(&stripdata, s->sot, le);

  1320.             else

  1321.                 soff = s->stripoff;

  1322. 

  1323.             if (soff > avpkt->size || ssize > avpkt->size - soff || ssize > remaining) {

  1324.                 av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1325.                 return AVERROR_INVALIDDATA;

  1326.             }

  1327.             remaining -= ssize;

  1328.             if ((ret = tiff_unpack_strip(s, p, dst, stride, avpkt->data + soff, ssize, i,

  1329.                                          FFMIN(s->rps, s->height - i))) < 0) {

  1330.                 if (avctx->err_recognition & AV_EF_EXPLODE)

  1331.                     return ret;

  1332.                 break;

  1333.             }

  1334.         }

  1335.         decoded_height = FFMIN(i, s->height);

  1336. 

  1337.         if (s->predictor == 2) {

  1338.             if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {

  1339.                 av_log(s->avctx, AV_LOG_ERROR, "predictor == 2 with YUV is unsupported");

  1340.                 return AVERROR_PATCHWELCOME;

  1341.             }

  1342.             dst   = p->data[plane];

  1343.             soff  = s->bpp >> 3;

  1344.             if (s->planar)

  1345.                 soff  = FFMAX(soff / s->bppcount, 1);

  1346.             ssize = s->width * soff;

  1347.             if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1348.                 s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||

  1349.                 s->avctx->pix_fmt == AV_PIX_FMT_GRAY16LE ||

  1350.                 s->avctx->pix_fmt == AV_PIX_FMT_YA16LE ||

  1351.                 s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||

  1352.                 s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {

  1353.                 for (i = 0; i < decoded_height; i++) {

  1354.                     for (j = soff; j < ssize; j += 2)

  1355.                         AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1356.                     dst += stride;

  1357.                 }

  1358.             } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1359.                        s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||

  1360.                        s->avctx->pix_fmt == AV_PIX_FMT_GRAY16BE ||

  1361.                        s->avctx->pix_fmt == AV_PIX_FMT_YA16BE ||

  1362.                        s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||

  1363.                        s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {

  1364.                 for (i = 0; i < decoded_height; i++) {

  1365.                     for (j = soff; j < ssize; j += 2)

  1366.                         AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1367.                     dst += stride;

  1368.                 }

  1369.             } else {

  1370.                 for (i = 0; i < decoded_height; i++) {

  1371.                     for (j = soff; j < ssize; j++)

  1372.                         dst[j] += dst[j - soff];

  1373.                     dst += stride;

  1374.                 }

  1375.             }

  1376.         }

  1377. 

  1378.         if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {

  1379.             int c = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255);

  1380.             dst = p->data[plane];

  1381.             for (i = 0; i < s->height; i++) {

  1382.                 for (j = 0; j < stride; j++)

  1383.                     dst[j] = c - dst[j];

  1384.                 dst += stride;

  1385.             }

  1386.         }

  1387.     }

  1388. 

  1389.     if (s->planar && s->bppcount > 2) {

  1390.         FFSWAP(uint8_t*, p->data[0],     p->data[2]);

  1391.         FFSWAP(int,      p->linesize[0], p->linesize[2]);

  1392.         FFSWAP(uint8_t*, p->data[0],     p->data[1]);

  1393.         FFSWAP(int,      p->linesize[0], p->linesize[1]);

  1394.     }

  1395. 

  1396.     *got_frame = 1;

  1397. 

  1398.     return avpkt->size;

  1399. }

  1400. 

  1401. static av_cold int tiff_init(AVCodecContext *avctx)

  1402. {

  1403.     TiffContext *s = avctx->priv_data;

  1404. 

  1405.     s->width  = 0;

  1406.     s->height = 0;

  1407.     s->subsampling[0] =

  1408.     s->subsampling[1] = 1;

  1409.     s->avctx  = avctx;

  1410.     ff_lzw_decode_open(&s->lzw);

  1411.     if (!s->lzw)

  1412.         return AVERROR(ENOMEM);

  1413.     ff_ccitt_unpack_init();

  1414. 

  1415.     return 0;

  1416. }

  1417. 

  1418. static av_cold int tiff_end(AVCodecContext *avctx)

  1419. {

  1420.     TiffContext *const s = avctx->priv_data;

  1421. 

  1422.     free_geotags(s);

  1423. 

  1424.     ff_lzw_decode_close(&s->lzw);

  1425.     av_freep(&s->deinvert_buf);

  1426.     s->deinvert_buf_size = 0;

  1427.     av_freep(&s->fax_buffer);

  1428.     s->fax_buffer_size = 0;

  1429.     return 0;

  1430. }

  1431. 

  1432. AVCodec ff_tiff_decoder = {

  1433.     .name           = "tiff",

  1434.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1435.     .type           = AVMEDIA_TYPE_VIDEO,

  1436.     .id             = AV_CODEC_ID_TIFF,

  1437.     .priv_data_size = sizeof(TiffContext),

  1438.     .init           = tiff_init,

  1439.     .close          = tiff_end,

  1440.     .decode         = decode_frame,

  1441.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(tiff_init),

  1442.     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,

  1443. };