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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. 

  78.     int geotag_count;

  79.     TiffGeoTag *geotags;

  80. } TiffContext;

  81. 

  82. static void free_geotags(TiffContext *const s)

  83. {

  84.     int i;

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

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

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

  88.     }

  89.     av_freep(&s->geotags);

  90.     s->geotag_count = 0;

  91. }

  92. 

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

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

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

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

  97. 

  98. static const char *get_geokey_name(int key)

  99. {

  100.     RET_GEOKEY(VERT, vert, name);

  101.     RET_GEOKEY(PROJ, proj, name);

  102.     RET_GEOKEY(GEOG, geog, name);

  103.     RET_GEOKEY(CONF, conf, name);

  104. 

  105.     return NULL;

  106. }

  107. 

  108. static int get_geokey_type(int key)

  109. {

  110.     RET_GEOKEY(VERT, vert, type);

  111.     RET_GEOKEY(PROJ, proj, type);

  112.     RET_GEOKEY(GEOG, geog, type);

  113.     RET_GEOKEY(CONF, conf, type);

  114. 

  115.     return AVERROR_INVALIDDATA;

  116. }

  117. 

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

  119. {

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

  121. }

  122. 

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

  124. {

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

  126.     if(r)

  127.         return r->name;

  128. 

  129.     return NULL;

  130. }

  131. 

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

  133. {

  134.     char *ap;

  135. 

  136.     if (val == TIFF_GEO_KEY_UNDEFINED)

  137.         return av_strdup("undefined");

  138.     if (val == TIFF_GEO_KEY_USER_DEFINED)

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

  140. 

  141. #define RET_GEOKEY_VAL(TYPE, array)\

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

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

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

  145. 

  146.     switch (key) {

  147.     case TIFF_GT_MODEL_TYPE_GEOKEY:

  148.         RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);

  149.         break;

  150.     case TIFF_GT_RASTER_TYPE_GEOKEY:

  151.         RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);

  152.         break;

  153.     case TIFF_GEOG_LINEAR_UNITS_GEOKEY:

  154.     case TIFF_PROJ_LINEAR_UNITS_GEOKEY:

  155.     case TIFF_VERTICAL_UNITS_GEOKEY:

  156.         RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);

  157.         break;

  158.     case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:

  159.     case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:

  160.         RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);

  161.         break;

  162.     case TIFF_GEOGRAPHIC_TYPE_GEOKEY:

  163.         RET_GEOKEY_VAL(GCS_TYPE, gcs_type);

  164.         RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);

  165.         break;

  166.     case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:

  167.         RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);

  168.         RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);

  169.         break;

  170.     case TIFF_GEOG_ELLIPSOID_GEOKEY:

  171.         RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);

  172.         break;

  173.     case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:

  174.         RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);

  175.         break;

  176.     case TIFF_PROJECTED_CS_TYPE_GEOKEY:

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

  178.         if(ap) return ap;

  179.         break;

  180.     case TIFF_PROJECTION_GEOKEY:

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

  182.         if(ap) return ap;

  183.         break;

  184.     case TIFF_PROJ_COORD_TRANS_GEOKEY:

  185.         RET_GEOKEY_VAL(COORD_TRANS, coord_trans);

  186.         break;

  187.     case TIFF_VERTICAL_CS_TYPE_GEOKEY:

  188.         RET_GEOKEY_VAL(VERT_CS, vert_cs);

  189.         RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);

  190.         break;

  191. 

  192.     }

  193. 

  194.     ap = av_malloc(14);

  195.     if (ap)

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

  197.     return ap;

  198. }

  199. 

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

  201. {

  202.     int i;

  203.     char *ap, *ap0;

  204.     uint64_t component_len;

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

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

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

  208.         return NULL;

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

  210.     if (!ap)

  211.         return NULL;

  212.     ap0   = ap;

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

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

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

  216.         if(l >= component_len) {

  217.             av_free(ap0);

  218.             return NULL;

  219.         }

  220.         ap += l;

  221.     }

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

  223.     return ap0;

  224. }

  225. 

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

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

  228. {

  229.     switch(type) {

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

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

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

  233.     default         : return AVERROR_INVALIDDATA;

  234.     };

  235. }

  236. 

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

  238.                                              int usePtr, const uint8_t *src,

  239.                                              uint8_t c, int width, int offset)

  240. {

  241.     switch (bpp) {

  242.     case 1:

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

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

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

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

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

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

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

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

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

  252.         }

  253.         break;

  254.     case 2:

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

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

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

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

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

  260.         }

  261.         break;

  262.     case 4:

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

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

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

  266.         }

  267.         break;

  268.     default:

  269.         if (usePtr) {

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

  271.         } else {

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

  273.         }

  274.     }

  275. }

  276. 

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

  278. {

  279.     int i;

  280. 

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

  282.     if (!s->deinvert_buf)

  283.         return AVERROR(ENOMEM);

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

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

  286. 

  287.     return 0;

  288. }

  289. 

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

  291.                        const uint8_t *src, int lnum)

  292. {

  293.     int i, j, k;

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

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

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

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

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

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

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

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

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

  303.             *pu++ = *src++;

  304.             *pv++ = *src++;

  305.         }

  306.     }else{

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

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

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

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

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

  312.             *pu++ = *src++;

  313.             *pv++ = *src++;

  314.         }

  315.     }

  316. }

  317. 

  318. #if CONFIG_ZLIB

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

  320.                            int size)

  321. {

  322.     z_stream zstream = { 0 };

  323.     int zret;

  324. 

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

  326.     zstream.avail_in  = size;

  327.     zstream.next_out  = dst;

  328.     zstream.avail_out = *len;

  329.     zret              = inflateInit(&zstream);

  330.     if (zret != Z_OK) {

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

  332.         return zret;

  333.     }

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

  335.     inflateEnd(&zstream);

  336.     *len = zstream.total_out;

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

  338. }

  339. 

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

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

  342.                             int strip_start, int is_yuv)

  343. {

  344.     uint8_t *zbuf;

  345.     unsigned long outlen;

  346.     int ret, line;

  347.     outlen = width * lines;

  348.     zbuf   = av_malloc(outlen);

  349.     if (!zbuf)

  350.         return AVERROR(ENOMEM);

  351.     if (s->fill_order) {

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

  353.             av_free(zbuf);

  354.             return ret;

  355.         }

  356.         src = s->deinvert_buf;

  357.     }

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

  359.     if (ret != Z_OK) {

  360.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  363.         av_free(zbuf);

  364.         return AVERROR_UNKNOWN;

  365.     }

  366.     src = zbuf;

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

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

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

  370.         } else {

  371.             memcpy(dst, src, width);

  372.         }

  373.         if (is_yuv) {

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

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

  376.         }

  377.         dst += stride;

  378.         src += width;

  379.     }

  380.     av_free(zbuf);

  381.     return 0;

  382. }

  383. #endif

  384. 

  385. #if CONFIG_LZMA

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

  387.                                 int size)

  388. {

  389.     lzma_stream stream = LZMA_STREAM_INIT;

  390.     lzma_ret ret;

  391. 

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

  393.     stream.avail_in  = size;

  394.     stream.next_out  = dst;

  395.     stream.avail_out = *len;

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

  397.     if (ret != LZMA_OK) {

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

  399.         return ret;

  400.     }

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

  402.     lzma_end(&stream);

  403.     *len = stream.total_out;

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

  405. }

  406. 

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

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

  409.                             int strip_start, int is_yuv)

  410. {

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

  412.     int ret, line;

  413.     uint8_t *buf = av_malloc(outlen);

  414.     if (!buf)

  415.         return AVERROR(ENOMEM);

  416.     if (s->fill_order) {

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

  418.             av_free(buf);

  419.             return ret;

  420.         }

  421.         src = s->deinvert_buf;

  422.     }

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

  424.     if (ret != LZMA_OK) {

  425.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  428.         av_free(buf);

  429.         return AVERROR_UNKNOWN;

  430.     }

  431.     src = buf;

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

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

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

  435.         } else {

  436.             memcpy(dst, src, width);

  437.         }

  438.         if (is_yuv) {

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

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

  441.         }

  442.         dst += stride;

  443.         src += width;

  444.     }

  445.     av_free(buf);

  446.     return 0;

  447. }

  448. #endif

  449. 

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

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

  452. {

  453.     int i, ret = 0;

  454.     int line;

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

  456.                               AV_INPUT_BUFFER_PADDING_SIZE);

  457. 

  458.     if (!src2) {

  459.         av_log(s->avctx, AV_LOG_ERROR,

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

  461.         return AVERROR(ENOMEM);

  462.     }

  463. 

  464.     if (!s->fill_order) {

  465.         memcpy(src2, src, size);

  466.     } else {

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

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

  469.     }

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

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

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

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

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

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

  476.             dst += stride;

  477.         }

  478.     av_free(src2);

  479.     return ret;

  480. }

  481. 

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

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

  484. {

  485.     PutByteContext pb;

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

  487.     const uint8_t *ssrc = src;

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

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

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

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

  492.                  desc->nb_components >= 3;

  493. 

  494.     if (s->planar)

  495.         width /= s->bppcount;

  496. 

  497.     if (size <= 0)

  498.         return AVERROR_INVALIDDATA;

  499. 

  500.     if (is_yuv) {

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

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

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

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

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

  506.             return AVERROR(ENOMEM);

  507.         }

  508.         dst = s->yuv_line;

  509.         stride = 0;

  510. 

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

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

  513.         av_assert0(width <= bytes_per_row);

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

  515.     }

  516. 

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

  518. #if CONFIG_ZLIB

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

  520.                                 strip_start, is_yuv);

  521. #else

  522.         av_log(s->avctx, AV_LOG_ERROR,

  523.                "zlib support not enabled, "

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

  525.         return AVERROR(ENOSYS);

  526. #endif

  527.     }

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

  529. #if CONFIG_LZMA

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

  531.                                 strip_start, is_yuv);

  532. #else

  533.         av_log(s->avctx, AV_LOG_ERROR,

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

  535.         return AVERROR(ENOSYS);

  536. #endif

  537.     }

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

  539.         if (s->fill_order) {

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

  541.                 return ret;

  542.             ssrc = src = s->deinvert_buf;

  543.         }

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

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

  546.         }

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

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

  549.             return ret;

  550.         }

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

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

  553.             if (pixels < width) {

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

  555.                        pixels, width);

  556.                 return AVERROR_INVALIDDATA;

  557.             }

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

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

  560.             if (is_yuv) {

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

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

  563.             }

  564.             dst += stride;

  565.         }

  566.         return 0;

  567.     }

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

  569.         s->compr == TIFF_G3        ||

  570.         s->compr == TIFF_G4) {

  571.         if (is_yuv)

  572.             return AVERROR_INVALIDDATA;

  573. 

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

  575.     }

  576. 

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

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

  579. 

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

  581.         if (src - ssrc > size) {

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

  583.             return AVERROR_INVALIDDATA;

  584.         }

  585. 

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

  587.             break;

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

  589.         switch (s->compr) {

  590.         case TIFF_RAW:

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

  592.                 return AVERROR_INVALIDDATA;

  593. 

  594.             if (!s->fill_order) {

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

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

  597.             } else {

  598.                 int i;

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

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

  601.             }

  602.             src += width;

  603.             break;

  604.         case TIFF_PACKBITS:

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

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

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

  608.                     return AVERROR_INVALIDDATA;

  609.                 }

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

  611.                 if (code >= 0) {

  612.                     code++;

  613.                     if (pixels + code > width ||

  614.                         ssrc + size - src < code) {

  615.                         av_log(s->avctx, AV_LOG_ERROR,

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

  617.                         return AVERROR_INVALIDDATA;

  618.                     }

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

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

  621.                     src    += code;

  622.                     pixels += code;

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

  624.                     code = (-code) + 1;

  625.                     if (pixels + code > width) {

  626.                         av_log(s->avctx, AV_LOG_ERROR,

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

  628.                         return AVERROR_INVALIDDATA;

  629.                     }

  630.                     c = *src++;

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

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

  633.                     pixels += code;

  634.                 }

  635.             }

  636.             if (s->fill_order) {

  637.                 int i;

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

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

  640.             }

  641.             break;

  642.         }

  643.         if (is_yuv) {

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

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

  646.         }

  647.         dst += stride;

  648.     }

  649.     return 0;

  650. }

  651. 

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

  653. {

  654.     int ret;

  655.     int create_gray_palette = 0;

  656. 

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

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

  659.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  662.         return AVERROR_INVALIDDATA;

  663.     }

  664. 

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

  666.     case 11:

  667.         if (!s->palette_is_set) {

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

  669.             break;

  670.         }

  671.     case 21:

  672.     case 41:

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

  674.         if (!s->palette_is_set) {

  675.             create_gray_palette = 1;

  676.         }

  677.         break;

  678.     case 81:

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

  680.         break;

  681.     case 243:

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

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

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

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

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

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

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

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

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

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

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

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

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

  695.             } else {

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

  697.                 return AVERROR_PATCHWELCOME;

  698.             }

  699.         } else

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

  701.         break;

  702.     case 161:

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

  704.         break;

  705.     case 162:

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

  707.         break;

  708.     case 322:

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

  710.         break;

  711.     case 324:

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

  713.         break;

  714.     case 483:

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

  716.         break;

  717.     case 644:

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

  719.         break;

  720.     case 1243:

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

  722.         break;

  723.     case 1324:

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

  725.         break;

  726.     case 1483:

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

  728.         break;

  729.     case 1644:

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

  731.         break;

  732.     default:

  733.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  736.         return AVERROR_INVALIDDATA;

  737.     }

  738. 

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

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

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

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

  743.            desc->nb_components < 3) {

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

  745.             return AVERROR_INVALIDDATA;

  746.         }

  747.     }

  748. 

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

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

  751.         if (ret < 0)

  752.             return ret;

  753.     }

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

  755.         return ret;

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

  757.         if (!create_gray_palette)

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

  759.         else {

  760.             /* make default grayscale pal */

  761.             int i;

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

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

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

  765.         }

  766.     }

  767.     return 0;

  768. }

  769. 

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

  771. {

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

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

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

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

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

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

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

  779.             num = num >> 1;

  780.             den = den >> 1;

  781.         }

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

  783.                   num, den, INT32_MAX);

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

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

  786.     }

  787. }

  788. 

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

  790. {

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

  792.     int i, start;

  793.     int pos;

  794.     int ret;

  795.     double *dp;

  796. 

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

  798.     if (ret < 0) {

  799.         goto end;

  800.     }

  801. 

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

  803.     if (count == 1) {

  804.         switch (type) {

  805.         case TIFF_BYTE:

  806.         case TIFF_SHORT:

  807.         case TIFF_LONG:

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

  809.             break;

  810.         case TIFF_RATIONAL:

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

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

  813.             break;

  814.         case TIFF_STRING:

  815.             if (count <= 4) {

  816.                 break;

  817.             }

  818.         default:

  819.             value = UINT_MAX;

  820.         }

  821.     }

  822. 

  823.     switch (tag) {

  824.     case TIFF_WIDTH:

  825.         s->width = value;

  826.         break;

  827.     case TIFF_HEIGHT:

  828.         s->height = value;

  829.         break;

  830.     case TIFF_BPP:

  831.         if (count > 4U) {

  832.             av_log(s->avctx, AV_LOG_ERROR,

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

  834.                    value, count);

  835.             return AVERROR_INVALIDDATA;

  836.         }

  837.         s->bppcount = count;

  838.         if (count == 1)

  839.             s->bpp = value;

  840.         else {

  841.             switch (type) {

  842.             case TIFF_BYTE:

  843.             case TIFF_SHORT:

  844.             case TIFF_LONG:

  845.                 s->bpp = 0;

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

  847.                     return AVERROR_INVALIDDATA;

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

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

  850.                 break;

  851.             default:

  852.                 s->bpp = -1;

  853.             }

  854.         }

  855.         break;

  856.     case TIFF_SAMPLES_PER_PIXEL:

  857.         if (count != 1) {

  858.             av_log(s->avctx, AV_LOG_ERROR,

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

  860.             return AVERROR_INVALIDDATA;

  861.         }

  862.         if (value > 4U) {

  863.             av_log(s->avctx, AV_LOG_ERROR,

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

  865.             return AVERROR_INVALIDDATA;

  866.         }

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

  868.             s->bpp *= value;

  869.         s->bppcount = value;

  870.         break;

  871.     case TIFF_COMPR:

  872.         s->compr     = value;

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

  874.         s->predictor = 0;

  875.         switch (s->compr) {

  876.         case TIFF_RAW:

  877.         case TIFF_PACKBITS:

  878.         case TIFF_LZW:

  879.         case TIFF_CCITT_RLE:

  880.             break;

  881.         case TIFF_G3:

  882.         case TIFF_G4:

  883.             s->fax_opts = 0;

  884.             break;

  885.         case TIFF_DEFLATE:

  886.         case TIFF_ADOBE_DEFLATE:

  887. #if CONFIG_ZLIB

  888.             break;

  889. #else

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

  891.             return AVERROR(ENOSYS);

  892. #endif

  893.         case TIFF_JPEG:

  894.         case TIFF_NEWJPEG:

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

  896.             return AVERROR_PATCHWELCOME;

  897.         case TIFF_LZMA:

  898. #if CONFIG_LZMA

  899.             break;

  900. #else

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

  902.             return AVERROR(ENOSYS);

  903. #endif

  904.         default:

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

  906.                    s->compr);

  907.             return AVERROR_INVALIDDATA;

  908.         }

  909.         break;

  910.     case TIFF_ROWSPERSTRIP:

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

  912.             value = s->height;

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

  914.         break;

  915.     case TIFF_STRIP_OFFS:

  916.         if (count == 1) {

  917.             if (value > INT_MAX) {

  918.                 av_log(s->avctx, AV_LOG_ERROR,

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

  920.                 return AVERROR_INVALIDDATA;

  921.             }

  922.             s->strippos = 0;

  923.             s->stripoff = value;

  924.         } else

  925.             s->strippos = off;

  926.         s->strips = count;

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

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

  929.         s->sot = type;

  930.         break;

  931.     case TIFF_STRIP_SIZE:

  932.         if (count == 1) {

  933.             if (value > INT_MAX) {

  934.                 av_log(s->avctx, AV_LOG_ERROR,

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

  936.                 return AVERROR_INVALIDDATA;

  937.             }

  938.             s->stripsizesoff = 0;

  939.             s->stripsize     = value;

  940.             s->strips        = 1;

  941.         } else {

  942.             s->stripsizesoff = off;

  943.         }

  944.         s->strips = count;

  945.         s->sstype = type;

  946.         break;

  947.     case TIFF_XRES:

  948.     case TIFF_YRES:

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

  950.         break;

  951.     case TIFF_TILE_BYTE_COUNTS:

  952.     case TIFF_TILE_LENGTH:

  953.     case TIFF_TILE_OFFSETS:

  954.     case TIFF_TILE_WIDTH:

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

  956.         return AVERROR_PATCHWELCOME;

  957.         break;

  958.     case TIFF_PREDICTOR:

  959.         s->predictor = value;

  960.         break;

  961.     case TIFF_PHOTOMETRIC:

  962.         switch (value) {

  963.         case TIFF_PHOTOMETRIC_WHITE_IS_ZERO:

  964.         case TIFF_PHOTOMETRIC_BLACK_IS_ZERO:

  965.         case TIFF_PHOTOMETRIC_RGB:

  966.         case TIFF_PHOTOMETRIC_PALETTE:

  967.         case TIFF_PHOTOMETRIC_YCBCR:

  968.             s->photometric = value;

  969.             break;

  970.         case TIFF_PHOTOMETRIC_ALPHA_MASK:

  971.         case TIFF_PHOTOMETRIC_SEPARATED:

  972.         case TIFF_PHOTOMETRIC_CIE_LAB:

  973.         case TIFF_PHOTOMETRIC_ICC_LAB:

  974.         case TIFF_PHOTOMETRIC_ITU_LAB:

  975.         case TIFF_PHOTOMETRIC_CFA:

  976.         case TIFF_PHOTOMETRIC_LOG_L:

  977.         case TIFF_PHOTOMETRIC_LOG_LUV:

  978.         case TIFF_PHOTOMETRIC_LINEAR_RAW:

  979.             avpriv_report_missing_feature(s->avctx,

  980.                                           "PhotometricInterpretation 0x%04X",

  981.                                           value);

  982.             return AVERROR_PATCHWELCOME;

  983.         default:

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

  985.                    "unknown\n", value);

  986.             return AVERROR_INVALIDDATA;

  987.         }

  988.         break;

  989.     case TIFF_FILL_ORDER:

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

  991.             av_log(s->avctx, AV_LOG_ERROR,

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

  993.             value = 1;

  994.         }

  995.         s->fill_order = value - 1;

  996.         break;

  997.     case TIFF_PAL: {

  998.         GetByteContext pal_gb[3];

  999.         off = type_sizes[type];

  1000.         if (count / 3 > 256 ||

  1001.             bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)

  1002.             return AVERROR_INVALIDDATA;

  1003. 

  1004.         pal_gb[0] = pal_gb[1] = pal_gb[2] = s->gb;

  1005.         bytestream2_skip(&pal_gb[1], count / 3 * off);

  1006.         bytestream2_skip(&pal_gb[2], count / 3 * off * 2);

  1007. 

  1008.         off = (type_sizes[type] - 1) << 3;

  1009.         if (off > 31U) {

  1010.             av_log(s->avctx, AV_LOG_ERROR, "palette shift %d is out of range\n", off);

  1011.             return AVERROR_INVALIDDATA;

  1012.         }

  1013. 

  1014.         for (i = 0; i < count / 3; i++) {

  1015.             uint32_t p = 0xFF000000;

  1016.             p |= (ff_tget(&pal_gb[0], type, s->le) >> off) << 16;

  1017.             p |= (ff_tget(&pal_gb[1], type, s->le) >> off) << 8;

  1018.             p |=  ff_tget(&pal_gb[2], type, s->le) >> off;

  1019.             s->palette[i] = p;

  1020.         }

  1021.         s->palette_is_set = 1;

  1022.         break;

  1023.     }

  1024.     case TIFF_PLANAR:

  1025.         s->planar = value == 2;

  1026.         break;

  1027.     case TIFF_YCBCR_SUBSAMPLING:

  1028.         if (count != 2) {

  1029.             av_log(s->avctx, AV_LOG_ERROR, "subsample count invalid\n");

  1030.             return AVERROR_INVALIDDATA;

  1031.         }

  1032.         for (i = 0; i < count; i++) {

  1033.             s->subsampling[i] = ff_tget(&s->gb, type, s->le);

  1034.             if (s->subsampling[i] <= 0) {

  1035.                 av_log(s->avctx, AV_LOG_ERROR, "subsampling %d is invalid\n", s->subsampling[i]);

  1036.                 s->subsampling[i] = 1;

  1037.                 return AVERROR_INVALIDDATA;

  1038.             }

  1039.         }

  1040.         break;

  1041.     case TIFF_T4OPTIONS:

  1042.         if (s->compr == TIFF_G3)

  1043.             s->fax_opts = value;

  1044.         break;

  1045.     case TIFF_T6OPTIONS:

  1046.         if (s->compr == TIFF_G4)

  1047.             s->fax_opts = value;

  1048.         break;

  1049. #define ADD_METADATA(count, name, sep)\

  1050.     if ((ret = add_metadata(count, type, name, sep, s, frame)) < 0) {\

  1051.         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\

  1052.         goto end;\

  1053.     }

  1054.     case TIFF_MODEL_PIXEL_SCALE:

  1055.         ADD_METADATA(count, "ModelPixelScaleTag", NULL);

  1056.         break;

  1057.     case TIFF_MODEL_TRANSFORMATION:

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

  1059.         break;

  1060.     case TIFF_MODEL_TIEPOINT:

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

  1062.         break;

  1063.     case TIFF_GEO_KEY_DIRECTORY:

  1064.         if (s->geotag_count) {

  1065.             avpriv_request_sample(s->avctx, "Multiple geo key directories\n");

  1066.             return AVERROR_INVALIDDATA;

  1067.         }

  1068.         ADD_METADATA(1, "GeoTIFF_Version", NULL);

  1069.         ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");

  1070.         s->geotag_count   = ff_tget_short(&s->gb, s->le);

  1071.         if (s->geotag_count > count / 4 - 1) {

  1072.             s->geotag_count = count / 4 - 1;

  1073.             av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n");

  1074.         }

  1075.         if (   bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4

  1076.             || s->geotag_count == 0) {

  1077.             s->geotag_count = 0;

  1078.             return -1;

  1079.         }

  1080.         s->geotags = av_mallocz_array(s->geotag_count, sizeof(TiffGeoTag));

  1081.         if (!s->geotags) {

  1082.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1083.             s->geotag_count = 0;

  1084.             goto end;

  1085.         }

  1086.         for (i = 0; i < s->geotag_count; i++) {

  1087.             s->geotags[i].key    = ff_tget_short(&s->gb, s->le);

  1088.             s->geotags[i].type   = ff_tget_short(&s->gb, s->le);

  1089.             s->geotags[i].count  = ff_tget_short(&s->gb, s->le);

  1090. 

  1091.             if (!s->geotags[i].type)

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

  1093.             else

  1094.                 s->geotags[i].offset = ff_tget_short(&s->gb, s->le);

  1095.         }

  1096.         break;

  1097.     case TIFF_GEO_DOUBLE_PARAMS:

  1098.         if (count >= INT_MAX / sizeof(int64_t))

  1099.             return AVERROR_INVALIDDATA;

  1100.         if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))

  1101.             return AVERROR_INVALIDDATA;

  1102.         dp = av_malloc_array(count, sizeof(double));

  1103.         if (!dp) {

  1104.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1105.             goto end;

  1106.         }

  1107.         for (i = 0; i < count; i++)

  1108.             dp[i] = ff_tget_double(&s->gb, s->le);

  1109.         for (i = 0; i < s->geotag_count; i++) {

  1110.             if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) {

  1111.                 if (s->geotags[i].count == 0

  1112.                     || s->geotags[i].offset + s->geotags[i].count > count) {

  1113.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  1114.                 } else if (s->geotags[i].val) {

  1115.                     av_log(s->avctx, AV_LOG_WARNING, "Duplicate GeoTIFF key %d\n", s->geotags[i].key);

  1116.                 } else {

  1117.                     char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");

  1118.                     if (!ap) {

  1119.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1120.                         av_freep(&dp);

  1121.                         return AVERROR(ENOMEM);

  1122.                     }

  1123.                     s->geotags[i].val = ap;

  1124.                 }

  1125.             }

  1126.         }

  1127.         av_freep(&dp);

  1128.         break;

  1129.     case TIFF_GEO_ASCII_PARAMS:

  1130.         pos = bytestream2_tell(&s->gb);

  1131.         for (i = 0; i < s->geotag_count; i++) {

  1132.             if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) {

  1133.                 if (s->geotags[i].count == 0

  1134.                     || s->geotags[i].offset +  s->geotags[i].count > count) {

  1135.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  1136.                 } else {

  1137.                     char *ap;

  1138. 

  1139.                     bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);

  1140.                     if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)

  1141.                         return AVERROR_INVALIDDATA;

  1142.                     if (s->geotags[i].val)

  1143.                         return AVERROR_INVALIDDATA;

  1144.                     ap = av_malloc(s->geotags[i].count);

  1145.                     if (!ap) {

  1146.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1147.                         return AVERROR(ENOMEM);

  1148.                     }

  1149.                     bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);

  1150.                     ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte

  1151.                     s->geotags[i].val = ap;

  1152.                 }

  1153.             }

  1154.         }

  1155.         break;

  1156.     case TIFF_ARTIST:

  1157.         ADD_METADATA(count, "artist", NULL);

  1158.         break;

  1159.     case TIFF_COPYRIGHT:

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

  1161.         break;

  1162.     case TIFF_DATE:

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

  1164.         break;

  1165.     case TIFF_DOCUMENT_NAME:

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

  1167.         break;

  1168.     case TIFF_HOST_COMPUTER:

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

  1170.         break;

  1171.     case TIFF_IMAGE_DESCRIPTION:

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

  1173.         break;

  1174.     case TIFF_MAKE:

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

  1176.         break;

  1177.     case TIFF_MODEL:

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

  1179.         break;

  1180.     case TIFF_PAGE_NAME:

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

  1182.         break;

  1183.     case TIFF_PAGE_NUMBER:

  1184.         ADD_METADATA(count, "page_number", " / ");

  1185.         break;

  1186.     case TIFF_SOFTWARE_NAME:

  1187.         ADD_METADATA(count, "software", NULL);

  1188.         break;

  1189.     default:

  1190.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  1191.             av_log(s->avctx, AV_LOG_ERROR,

  1192.                    "Unknown or unsupported tag %d/0X%0X\n",

  1193.                    tag, tag);

  1194.             return AVERROR_INVALIDDATA;

  1195.         }

  1196.     }

  1197. end:

  1198.     if (s->bpp > 64U) {

  1199.         av_log(s->avctx, AV_LOG_ERROR,

  1200.                 "This format is not supported (bpp=%d, %d components)\n",

  1201.                 s->bpp, count);

  1202.         s->bpp = 0;

  1203.         return AVERROR_INVALIDDATA;

  1204.     }

  1205.     bytestream2_seek(&s->gb, start, SEEK_SET);

  1206.     return 0;

  1207. }

  1208. 

  1209. static int decode_frame(AVCodecContext *avctx,

  1210.                         void *data, int *got_frame, AVPacket *avpkt)

  1211. {

  1212.     TiffContext *const s = avctx->priv_data;

  1213.     AVFrame *const p = data;

  1214.     ThreadFrame frame = { .f = data };

  1215.     unsigned off;

  1216.     int le, ret, plane, planes;

  1217.     int i, j, entries, stride;

  1218.     unsigned soff, ssize;

  1219.     uint8_t *dst;

  1220.     GetByteContext stripsizes;

  1221.     GetByteContext stripdata;

  1222. 

  1223.     bytestream2_init(&s->gb, avpkt->data, avpkt->size);

  1224. 

  1225.     // parse image header

  1226.     if ((ret = ff_tdecode_header(&s->gb, &le, &off))) {

  1227.         av_log(avctx, AV_LOG_ERROR, "Invalid TIFF header\n");

  1228.         return ret;

  1229.     } else if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {

  1230.         av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");

  1231.         return AVERROR_INVALIDDATA;

  1232.     }

  1233.     s->le          = le;

  1234.     // TIFF_BPP is not a required tag and defaults to 1

  1235.     s->bppcount    = s->bpp = 1;

  1236.     s->photometric = TIFF_PHOTOMETRIC_NONE;

  1237.     s->compr       = TIFF_RAW;

  1238.     s->fill_order  = 0;

  1239.     free_geotags(s);

  1240. 

  1241.     // Reset these offsets so we can tell if they were set this frame

  1242.     s->stripsizesoff = s->strippos = 0;

  1243.     /* parse image file directory */

  1244.     bytestream2_seek(&s->gb, off, SEEK_SET);

  1245.     entries = ff_tget_short(&s->gb, le);

  1246.     if (bytestream2_get_bytes_left(&s->gb) < entries * 12)

  1247.         return AVERROR_INVALIDDATA;

  1248.     for (i = 0; i < entries; i++) {

  1249.         if ((ret = tiff_decode_tag(s, p)) < 0)

  1250.             return ret;

  1251.     }

  1252. 

  1253.     for (i = 0; i<s->geotag_count; i++) {

  1254.         const char *keyname = get_geokey_name(s->geotags[i].key);

  1255.         if (!keyname) {

  1256.             av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);

  1257.             continue;

  1258.         }

  1259.         if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {

  1260.             av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);

  1261.             continue;

  1262.         }

  1263.         ret = av_dict_set(avpriv_frame_get_metadatap(p), keyname, s->geotags[i].val, 0);

  1264.         if (ret<0) {

  1265.             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);

  1266.             return ret;

  1267.         }

  1268.     }

  1269. 

  1270.     if (!s->strippos && !s->stripoff) {

  1271.         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");

  1272.         return AVERROR_INVALIDDATA;

  1273.     }

  1274.     /* now we have the data and may start decoding */

  1275.     if ((ret = init_image(s, &frame)) < 0)

  1276.         return ret;

  1277. 

  1278.     if (s->strips == 1 && !s->stripsize) {

  1279.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1280.         s->stripsize = avpkt->size - s->stripoff;

  1281.     }

  1282. 

  1283.     if (s->stripsizesoff) {

  1284.         if (s->stripsizesoff >= (unsigned)avpkt->size)

  1285.             return AVERROR_INVALIDDATA;

  1286.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,

  1287.                          avpkt->size - s->stripsizesoff);

  1288.     }

  1289.     if (s->strippos) {

  1290.         if (s->strippos >= (unsigned)avpkt->size)

  1291.             return AVERROR_INVALIDDATA;

  1292.         bytestream2_init(&stripdata, avpkt->data + s->strippos,

  1293.                          avpkt->size - s->strippos);

  1294.     }

  1295. 

  1296.     if (s->rps <= 0 || s->rps % s->subsampling[1]) {

  1297.         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);

  1298.         return AVERROR_INVALIDDATA;

  1299.     }

  1300. 

  1301.     planes = s->planar ? s->bppcount : 1;

  1302.     for (plane = 0; plane < planes; plane++) {

  1303.         stride = p->linesize[plane];

  1304.         dst = p->data[plane];

  1305.         for (i = 0; i < s->height; i += s->rps) {

  1306.             if (s->stripsizesoff)

  1307.                 ssize = ff_tget(&stripsizes, s->sstype, le);

  1308.             else

  1309.                 ssize = s->stripsize;

  1310. 

  1311.             if (s->strippos)

  1312.                 soff = ff_tget(&stripdata, s->sot, le);

  1313.             else

  1314.                 soff = s->stripoff;

  1315. 

  1316.             if (soff > avpkt->size || ssize > avpkt->size - soff) {

  1317.                 av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1318.                 return AVERROR_INVALIDDATA;

  1319.             }

  1320.             if ((ret = tiff_unpack_strip(s, p, dst, stride, avpkt->data + soff, ssize, i,

  1321.                                          FFMIN(s->rps, s->height - i))) < 0) {

  1322.                 if (avctx->err_recognition & AV_EF_EXPLODE)

  1323.                     return ret;

  1324.                 break;

  1325.             }

  1326.             dst += s->rps * stride;

  1327.         }

  1328.         if (s->predictor == 2) {

  1329.             if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {

  1330.                 av_log(s->avctx, AV_LOG_ERROR, "predictor == 2 with YUV is unsupported");

  1331.                 return AVERROR_PATCHWELCOME;

  1332.             }

  1333.             dst   = p->data[plane];

  1334.             soff  = s->bpp >> 3;

  1335.             if (s->planar)

  1336.                 soff  = FFMAX(soff / s->bppcount, 1);

  1337.             ssize = s->width * soff;

  1338.             if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1339.                 s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||

  1340.                 s->avctx->pix_fmt == AV_PIX_FMT_GRAY16LE ||

  1341.                 s->avctx->pix_fmt == AV_PIX_FMT_YA16LE ||

  1342.                 s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||

  1343.                 s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {

  1344.                 for (i = 0; i < s->height; i++) {

  1345.                     for (j = soff; j < ssize; j += 2)

  1346.                         AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1347.                     dst += stride;

  1348.                 }

  1349.             } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1350.                        s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||

  1351.                        s->avctx->pix_fmt == AV_PIX_FMT_GRAY16BE ||

  1352.                        s->avctx->pix_fmt == AV_PIX_FMT_YA16BE ||

  1353.                        s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||

  1354.                        s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {

  1355.                 for (i = 0; i < s->height; i++) {

  1356.                     for (j = soff; j < ssize; j += 2)

  1357.                         AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1358.                     dst += stride;

  1359.                 }

  1360.             } else {

  1361.                 for (i = 0; i < s->height; i++) {

  1362.                     for (j = soff; j < ssize; j++)

  1363.                         dst[j] += dst[j - soff];

  1364.                     dst += stride;

  1365.                 }

  1366.             }

  1367.         }

  1368. 

  1369.         if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {

  1370.             dst = p->data[plane];

  1371.             for (i = 0; i < s->height; i++) {

  1372.                 for (j = 0; j < stride; j++)

  1373.                     dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];

  1374.                 dst += stride;

  1375.             }

  1376.         }

  1377.     }

  1378. 

  1379.     if (s->planar && s->bppcount > 2) {

  1380.         FFSWAP(uint8_t*, p->data[0],     p->data[2]);

  1381.         FFSWAP(int,      p->linesize[0], p->linesize[2]);

  1382.         FFSWAP(uint8_t*, p->data[0],     p->data[1]);

  1383.         FFSWAP(int,      p->linesize[0], p->linesize[1]);

  1384.     }

  1385. 

  1386.     *got_frame = 1;

  1387. 

  1388.     return avpkt->size;

  1389. }

  1390. 

  1391. static av_cold int tiff_init(AVCodecContext *avctx)

  1392. {

  1393.     TiffContext *s = avctx->priv_data;

  1394. 

  1395.     s->width  = 0;

  1396.     s->height = 0;

  1397.     s->subsampling[0] =

  1398.     s->subsampling[1] = 1;

  1399.     s->avctx  = avctx;

  1400.     ff_lzw_decode_open(&s->lzw);

  1401.     ff_ccitt_unpack_init();

  1402. 

  1403.     return 0;

  1404. }

  1405. 

  1406. static av_cold int tiff_end(AVCodecContext *avctx)

  1407. {

  1408.     TiffContext *const s = avctx->priv_data;

  1409. 

  1410.     free_geotags(s);

  1411. 

  1412.     ff_lzw_decode_close(&s->lzw);

  1413.     av_freep(&s->deinvert_buf);

  1414.     return 0;

  1415. }

  1416. 

  1417. AVCodec ff_tiff_decoder = {

  1418.     .name           = "tiff",

  1419.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1420.     .type           = AVMEDIA_TYPE_VIDEO,

  1421.     .id             = AV_CODEC_ID_TIFF,

  1422.     .priv_data_size = sizeof(TiffContext),

  1423.     .init           = tiff_init,

  1424.     .close          = tiff_end,

  1425.     .decode         = decode_frame,

  1426.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(tiff_init),

  1427.     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,

  1428. };