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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 * 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.                               FF_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.     if (s->fax_opts & 2) {

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

  465.         av_free(src2);

  466.         return AVERROR_PATCHWELCOME;

  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, FF_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.     av_free(src2);

  483.     return ret;

  484. }

  485. 

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

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

  488. {

  489.     PutByteContext pb;

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

  491.     const uint8_t *ssrc = src;

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

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

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

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

  496.                  desc->nb_components >= 3;

  497. 

  498.     if (s->planar)

  499.         width /= s->bppcount;

  500. 

  501.     if (size <= 0)

  502.         return AVERROR_INVALIDDATA;

  503. 

  504.     if (is_yuv) {

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

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

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

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

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

  510.             return AVERROR(ENOMEM);

  511.         }

  512.         dst = s->yuv_line;

  513.         stride = 0;

  514. 

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

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

  517.         av_assert0(width <= bytes_per_row);

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

  519.     }

  520. 

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

  522. #if CONFIG_ZLIB

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

  524.                                 strip_start, is_yuv);

  525. #else

  526.         av_log(s->avctx, AV_LOG_ERROR,

  527.                "zlib support not enabled, "

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

  529.         return AVERROR(ENOSYS);

  530. #endif

  531.     }

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

  533. #if CONFIG_LZMA

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

  535.                                 strip_start, is_yuv);

  536. #else

  537.         av_log(s->avctx, AV_LOG_ERROR,

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

  539.         return AVERROR(ENOSYS);

  540. #endif

  541.     }

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

  543.         if (s->fill_order) {

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

  545.                 return ret;

  546.             ssrc = src = s->deinvert_buf;

  547.         }

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

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

  550.         }

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

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

  553.             return ret;

  554.         }

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

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

  557.             if (pixels < width) {

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

  559.                        pixels, width);

  560.                 return AVERROR_INVALIDDATA;

  561.             }

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

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

  564.             if (is_yuv) {

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

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

  567.             }

  568.             dst += stride;

  569.         }

  570.         return 0;

  571.     }

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

  573.         s->compr == TIFF_G3        ||

  574.         s->compr == TIFF_G4) {

  575.         if (is_yuv)

  576.             return AVERROR_INVALIDDATA;

  577. 

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

  579.     }

  580. 

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

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

  583. 

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

  585.         if (src - ssrc > size) {

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

  587.             return AVERROR_INVALIDDATA;

  588.         }

  589. 

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

  591.             break;

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

  593.         switch (s->compr) {

  594.         case TIFF_RAW:

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

  596.                 return AVERROR_INVALIDDATA;

  597. 

  598.             if (!s->fill_order) {

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

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

  601.             } else {

  602.                 int i;

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

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

  605.             }

  606.             src += width;

  607.             break;

  608.         case TIFF_PACKBITS:

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

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

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

  612.                     return AVERROR_INVALIDDATA;

  613.                 }

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

  615.                 if (code >= 0) {

  616.                     code++;

  617.                     if (pixels + code > width ||

  618.                         ssrc + size - src < code) {

  619.                         av_log(s->avctx, AV_LOG_ERROR,

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

  621.                         return AVERROR_INVALIDDATA;

  622.                     }

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

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

  625.                     src    += code;

  626.                     pixels += code;

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

  628.                     code = (-code) + 1;

  629.                     if (pixels + code > width) {

  630.                         av_log(s->avctx, AV_LOG_ERROR,

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

  632.                         return AVERROR_INVALIDDATA;

  633.                     }

  634.                     c = *src++;

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

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

  637.                     pixels += code;

  638.                 }

  639.             }

  640.             if (s->fill_order) {

  641.                 int i;

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

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

  644.             }

  645.             break;

  646.         }

  647.         if (is_yuv) {

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

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

  650.         }

  651.         dst += stride;

  652.     }

  653.     return 0;

  654. }

  655. 

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

  657. {

  658.     int ret;

  659.     int create_gray_palette = 0;

  660. 

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

  662.     case 11:

  663.         if (!s->palette_is_set) {

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

  665.             break;

  666.         }

  667.     case 21:

  668.     case 41:

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

  670.         if (!s->palette_is_set) {

  671.             create_gray_palette = 1;

  672.         }

  673.         break;

  674.     case 81:

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

  676.         break;

  677.     case 243:

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

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

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

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

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

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

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

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

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

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

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

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

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

  691.             } else {

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

  693.                 return AVERROR_PATCHWELCOME;

  694.             }

  695.         } else

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

  697.         break;

  698.     case 161:

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

  700.         break;

  701.     case 162:

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

  703.         break;

  704.     case 322:

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

  706.         break;

  707.     case 324:

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

  709.         break;

  710.     case 483:

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

  712.         break;

  713.     case 644:

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

  715.         break;

  716.     case 1243:

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

  718.         break;

  719.     case 1324:

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

  721.         break;

  722.     case 1483:

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

  724.         break;

  725.     case 1644:

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

  727.         break;

  728.     default:

  729.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  732.         return AVERROR_INVALIDDATA;

  733.     }

  734. 

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

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

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

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

  739.            desc->nb_components < 3) {

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

  741.             return AVERROR_INVALIDDATA;

  742.         }

  743.     }

  744. 

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

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

  747.         if (ret < 0)

  748.             return ret;

  749.     }

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

  751.         return ret;

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

  753.         if (!create_gray_palette)

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

  755.         else {

  756.             /* make default grayscale pal */

  757.             int i;

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

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

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

  761.         }

  762.     }

  763.     return 0;

  764. }

  765. 

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

  767. {

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

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

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

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

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

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

  774. }

  775. 

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

  777. {

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

  779.     int i, start;

  780.     int pos;

  781.     int ret;

  782.     double *dp;

  783. 

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

  785.     if (ret < 0) {

  786.         goto end;

  787.     }

  788. 

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

  790.     if (count == 1) {

  791.         switch (type) {

  792.         case TIFF_BYTE:

  793.         case TIFF_SHORT:

  794.         case TIFF_LONG:

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

  796.             break;

  797.         case TIFF_RATIONAL:

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

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

  800.             break;

  801.         case TIFF_STRING:

  802.             if (count <= 4) {

  803.                 break;

  804.             }

  805.         default:

  806.             value = UINT_MAX;

  807.         }

  808.     }

  809. 

  810.     switch (tag) {

  811.     case TIFF_WIDTH:

  812.         s->width = value;

  813.         break;

  814.     case TIFF_HEIGHT:

  815.         s->height = value;

  816.         break;

  817.     case TIFF_BPP:

  818.         if (count > 4U) {

  819.             av_log(s->avctx, AV_LOG_ERROR,

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

  821.                    value, count);

  822.             return AVERROR_INVALIDDATA;

  823.         }

  824.         s->bppcount = count;

  825.         if (count == 1)

  826.             s->bpp = value;

  827.         else {

  828.             switch (type) {

  829.             case TIFF_BYTE:

  830.             case TIFF_SHORT:

  831.             case TIFF_LONG:

  832.                 s->bpp = 0;

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

  834.                     return AVERROR_INVALIDDATA;

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

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

  837.                 break;

  838.             default:

  839.                 s->bpp = -1;

  840.             }

  841.         }

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

  843.             av_log(s->avctx, AV_LOG_ERROR,

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

  845.                    s->bpp, count);

  846.             s->bpp = 0;

  847.             return AVERROR_INVALIDDATA;

  848.         }

  849.         break;

  850.     case TIFF_SAMPLES_PER_PIXEL:

  851.         if (count != 1) {

  852.             av_log(s->avctx, AV_LOG_ERROR,

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

  854.             return AVERROR_INVALIDDATA;

  855.         }

  856.         if (value > 4U) {

  857.             av_log(s->avctx, AV_LOG_ERROR,

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

  859.             return AVERROR_INVALIDDATA;

  860.         }

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

  862.             s->bpp *= value;

  863.         s->bppcount = value;

  864.         break;

  865.     case TIFF_COMPR:

  866.         s->compr     = value;

  867.         s->predictor = 0;

  868.         switch (s->compr) {

  869.         case TIFF_RAW:

  870.         case TIFF_PACKBITS:

  871.         case TIFF_LZW:

  872.         case TIFF_CCITT_RLE:

  873.             break;

  874.         case TIFF_G3:

  875.         case TIFF_G4:

  876.             s->fax_opts = 0;

  877.             break;

  878.         case TIFF_DEFLATE:

  879.         case TIFF_ADOBE_DEFLATE:

  880. #if CONFIG_ZLIB

  881.             break;

  882. #else

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

  884.             return AVERROR(ENOSYS);

  885. #endif

  886.         case TIFF_JPEG:

  887.         case TIFF_NEWJPEG:

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

  889.             return AVERROR_PATCHWELCOME;

  890.         case TIFF_LZMA:

  891. #if CONFIG_LZMA

  892.             break;

  893. #else

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

  895.             return AVERROR(ENOSYS);

  896. #endif

  897.         default:

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

  899.                    s->compr);

  900.             return AVERROR_INVALIDDATA;

  901.         }

  902.         break;

  903.     case TIFF_ROWSPERSTRIP:

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

  905.             value = s->height;

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

  907.         break;

  908.     case TIFF_STRIP_OFFS:

  909.         if (count == 1) {

  910.             s->strippos = 0;

  911.             s->stripoff = value;

  912.         } else

  913.             s->strippos = off;

  914.         s->strips = count;

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

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

  917.         s->sot = type;

  918.         break;

  919.     case TIFF_STRIP_SIZE:

  920.         if (count == 1) {

  921.             s->stripsizesoff = 0;

  922.             s->stripsize     = value;

  923.             s->strips        = 1;

  924.         } else {

  925.             s->stripsizesoff = off;

  926.         }

  927.         s->strips = count;

  928.         s->sstype = type;

  929.         break;

  930.     case TIFF_XRES:

  931.     case TIFF_YRES:

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

  933.         break;

  934.     case TIFF_TILE_BYTE_COUNTS:

  935.     case TIFF_TILE_LENGTH:

  936.     case TIFF_TILE_OFFSETS:

  937.     case TIFF_TILE_WIDTH:

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

  939.         return AVERROR_PATCHWELCOME;

  940.         break;

  941.     case TIFF_PREDICTOR:

  942.         s->predictor = value;

  943.         break;

  944.     case TIFF_PHOTOMETRIC:

  945.         switch (value) {

  946.         case TIFF_PHOTOMETRIC_WHITE_IS_ZERO:

  947.         case TIFF_PHOTOMETRIC_BLACK_IS_ZERO:

  948.         case TIFF_PHOTOMETRIC_RGB:

  949.         case TIFF_PHOTOMETRIC_PALETTE:

  950.         case TIFF_PHOTOMETRIC_YCBCR:

  951.             s->photometric = value;

  952.             break;

  953.         case TIFF_PHOTOMETRIC_ALPHA_MASK:

  954.         case TIFF_PHOTOMETRIC_SEPARATED:

  955.         case TIFF_PHOTOMETRIC_CIE_LAB:

  956.         case TIFF_PHOTOMETRIC_ICC_LAB:

  957.         case TIFF_PHOTOMETRIC_ITU_LAB:

  958.         case TIFF_PHOTOMETRIC_CFA:

  959.         case TIFF_PHOTOMETRIC_LOG_L:

  960.         case TIFF_PHOTOMETRIC_LOG_LUV:

  961.         case TIFF_PHOTOMETRIC_LINEAR_RAW:

  962.             avpriv_report_missing_feature(s->avctx,

  963.                                           "PhotometricInterpretation 0x%04X",

  964.                                           value);

  965.             return AVERROR_PATCHWELCOME;

  966.         default:

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

  968.                    "unknown\n", value);

  969.             return AVERROR_INVALIDDATA;

  970.         }

  971.         break;

  972.     case TIFF_FILL_ORDER:

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

  974.             av_log(s->avctx, AV_LOG_ERROR,

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

  976.             value = 1;

  977.         }

  978.         s->fill_order = value - 1;

  979.         break;

  980.     case TIFF_PAL: {

  981.         GetByteContext pal_gb[3];

  982.         off = type_sizes[type];

  983.         if (count / 3 > 256 ||

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

  985.             return AVERROR_INVALIDDATA;

  986. 

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

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

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

  990. 

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

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

  993.             uint32_t p = 0xFF000000;

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

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

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

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

  998.         }

  999.         s->palette_is_set = 1;

  1000.         break;

  1001.     }

  1002.     case TIFF_PLANAR:

  1003.         s->planar = value == 2;

  1004.         break;

  1005.     case TIFF_YCBCR_SUBSAMPLING:

  1006.         if (count != 2) {

  1007.             av_log(s->avctx, AV_LOG_ERROR, "subsample count invalid\n");

  1008.             return AVERROR_INVALIDDATA;

  1009.         }

  1010.         for (i = 0; i < count; i++)

  1011.             s->subsampling[i] = ff_tget(&s->gb, type, s->le);

  1012.         break;

  1013.     case TIFF_T4OPTIONS:

  1014.         if (s->compr == TIFF_G3)

  1015.             s->fax_opts = value;

  1016.         break;

  1017.     case TIFF_T6OPTIONS:

  1018.         if (s->compr == TIFF_G4)

  1019.             s->fax_opts = value;

  1020.         break;

  1021. #define ADD_METADATA(count, name, sep)\

  1022.     if ((ret = add_metadata(count, type, name, sep, s, frame)) < 0) {\

  1023.         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\

  1024.         goto end;\

  1025.     }

  1026.     case TIFF_MODEL_PIXEL_SCALE:

  1027.         ADD_METADATA(count, "ModelPixelScaleTag", NULL);

  1028.         break;

  1029.     case TIFF_MODEL_TRANSFORMATION:

  1030.         ADD_METADATA(count, "ModelTransformationTag", NULL);

  1031.         break;

  1032.     case TIFF_MODEL_TIEPOINT:

  1033.         ADD_METADATA(count, "ModelTiepointTag", NULL);

  1034.         break;

  1035.     case TIFF_GEO_KEY_DIRECTORY:

  1036.         ADD_METADATA(1, "GeoTIFF_Version", NULL);

  1037.         ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");

  1038.         s->geotag_count   = ff_tget_short(&s->gb, s->le);

  1039.         if (s->geotag_count > count / 4 - 1) {

  1040.             s->geotag_count = count / 4 - 1;

  1041.             av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n");

  1042.         }

  1043.         if (bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4) {

  1044.             s->geotag_count = 0;

  1045.             return -1;

  1046.         }

  1047.         s->geotags = av_mallocz_array(s->geotag_count, sizeof(TiffGeoTag));

  1048.         if (!s->geotags) {

  1049.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1050.             s->geotag_count = 0;

  1051.             goto end;

  1052.         }

  1053.         for (i = 0; i < s->geotag_count; i++) {

  1054.             s->geotags[i].key    = ff_tget_short(&s->gb, s->le);

  1055.             s->geotags[i].type   = ff_tget_short(&s->gb, s->le);

  1056.             s->geotags[i].count  = ff_tget_short(&s->gb, s->le);

  1057. 

  1058.             if (!s->geotags[i].type)

  1059.                 s->geotags[i].val  = get_geokey_val(s->geotags[i].key, ff_tget_short(&s->gb, s->le));

  1060.             else

  1061.                 s->geotags[i].offset = ff_tget_short(&s->gb, s->le);

  1062.         }

  1063.         break;

  1064.     case TIFF_GEO_DOUBLE_PARAMS:

  1065.         if (count >= INT_MAX / sizeof(int64_t))

  1066.             return AVERROR_INVALIDDATA;

  1067.         if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))

  1068.             return AVERROR_INVALIDDATA;

  1069.         dp = av_malloc_array(count, sizeof(double));

  1070.         if (!dp) {

  1071.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1072.             goto end;

  1073.         }

  1074.         for (i = 0; i < count; i++)

  1075.             dp[i] = ff_tget_double(&s->gb, s->le);

  1076.         for (i = 0; i < s->geotag_count; i++) {

  1077.             if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) {

  1078.                 if (s->geotags[i].count == 0

  1079.                     || s->geotags[i].offset + s->geotags[i].count > count) {

  1080.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  1081.                 } else {

  1082.                     char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");

  1083.                     if (!ap) {

  1084.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1085.                         av_freep(&dp);

  1086.                         return AVERROR(ENOMEM);

  1087.                     }

  1088.                     s->geotags[i].val = ap;

  1089.                 }

  1090.             }

  1091.         }

  1092.         av_freep(&dp);

  1093.         break;

  1094.     case TIFF_GEO_ASCII_PARAMS:

  1095.         pos = bytestream2_tell(&s->gb);

  1096.         for (i = 0; i < s->geotag_count; i++) {

  1097.             if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) {

  1098.                 if (s->geotags[i].count == 0

  1099.                     || s->geotags[i].offset +  s->geotags[i].count > count) {

  1100.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  1101.                 } else {

  1102.                     char *ap;

  1103. 

  1104.                     bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);

  1105.                     if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)

  1106.                         return AVERROR_INVALIDDATA;

  1107.                     ap = av_malloc(s->geotags[i].count);

  1108.                     if (!ap) {

  1109.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1110.                         return AVERROR(ENOMEM);

  1111.                     }

  1112.                     bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);

  1113.                     ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte

  1114.                     s->geotags[i].val = ap;

  1115.                 }

  1116.             }

  1117.         }

  1118.         break;

  1119.     case TIFF_ARTIST:

  1120.         ADD_METADATA(count, "artist", NULL);

  1121.         break;

  1122.     case TIFF_COPYRIGHT:

  1123.         ADD_METADATA(count, "copyright", NULL);

  1124.         break;

  1125.     case TIFF_DATE:

  1126.         ADD_METADATA(count, "date", NULL);

  1127.         break;

  1128.     case TIFF_DOCUMENT_NAME:

  1129.         ADD_METADATA(count, "document_name", NULL);

  1130.         break;

  1131.     case TIFF_HOST_COMPUTER:

  1132.         ADD_METADATA(count, "computer", NULL);

  1133.         break;

  1134.     case TIFF_IMAGE_DESCRIPTION:

  1135.         ADD_METADATA(count, "description", NULL);

  1136.         break;

  1137.     case TIFF_MAKE:

  1138.         ADD_METADATA(count, "make", NULL);

  1139.         break;

  1140.     case TIFF_MODEL:

  1141.         ADD_METADATA(count, "model", NULL);

  1142.         break;

  1143.     case TIFF_PAGE_NAME:

  1144.         ADD_METADATA(count, "page_name", NULL);

  1145.         break;

  1146.     case TIFF_PAGE_NUMBER:

  1147.         ADD_METADATA(count, "page_number", " / ");

  1148.         break;

  1149.     case TIFF_SOFTWARE_NAME:

  1150.         ADD_METADATA(count, "software", NULL);

  1151.         break;

  1152.     default:

  1153.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  1154.             av_log(s->avctx, AV_LOG_ERROR,

  1155.                    "Unknown or unsupported tag %d/0X%0X\n",

  1156.                    tag, tag);

  1157.             return AVERROR_INVALIDDATA;

  1158.         }

  1159.     }

  1160. end:

  1161.     bytestream2_seek(&s->gb, start, SEEK_SET);

  1162.     return 0;

  1163. }

  1164. 

  1165. static int decode_frame(AVCodecContext *avctx,

  1166.                         void *data, int *got_frame, AVPacket *avpkt)

  1167. {

  1168.     TiffContext *const s = avctx->priv_data;

  1169.     AVFrame *const p = data;

  1170.     ThreadFrame frame = { .f = data };

  1171.     unsigned off;

  1172.     int le, ret, plane, planes;

  1173.     int i, j, entries, stride;

  1174.     unsigned soff, ssize;

  1175.     uint8_t *dst;

  1176.     GetByteContext stripsizes;

  1177.     GetByteContext stripdata;

  1178. 

  1179.     bytestream2_init(&s->gb, avpkt->data, avpkt->size);

  1180. 

  1181.     // parse image header

  1182.     if ((ret = ff_tdecode_header(&s->gb, &le, &off))) {

  1183.         av_log(avctx, AV_LOG_ERROR, "Invalid TIFF header\n");

  1184.         return ret;

  1185.     } else if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {

  1186.         av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");

  1187.         return AVERROR_INVALIDDATA;

  1188.     }

  1189.     s->le          = le;

  1190.     // TIFF_BPP is not a required tag and defaults to 1

  1191.     s->bppcount    = s->bpp = 1;

  1192.     s->photometric = TIFF_PHOTOMETRIC_NONE;

  1193.     s->compr       = TIFF_RAW;

  1194.     s->fill_order  = 0;

  1195.     free_geotags(s);

  1196. 

  1197.     // Reset these offsets so we can tell if they were set this frame

  1198.     s->stripsizesoff = s->strippos = 0;

  1199.     /* parse image file directory */

  1200.     bytestream2_seek(&s->gb, off, SEEK_SET);

  1201.     entries = ff_tget_short(&s->gb, le);

  1202.     if (bytestream2_get_bytes_left(&s->gb) < entries * 12)

  1203.         return AVERROR_INVALIDDATA;

  1204.     for (i = 0; i < entries; i++) {

  1205.         if ((ret = tiff_decode_tag(s, p)) < 0)

  1206.             return ret;

  1207.     }

  1208. 

  1209.     for (i = 0; i<s->geotag_count; i++) {

  1210.         const char *keyname = get_geokey_name(s->geotags[i].key);

  1211.         if (!keyname) {

  1212.             av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);

  1213.             continue;

  1214.         }

  1215.         if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {

  1216.             av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);

  1217.             continue;

  1218.         }

  1219.         ret = av_dict_set(avpriv_frame_get_metadatap(p), keyname, s->geotags[i].val, 0);

  1220.         if (ret<0) {

  1221.             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);

  1222.             return ret;

  1223.         }

  1224.     }

  1225. 

  1226.     if (!s->strippos && !s->stripoff) {

  1227.         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");

  1228.         return AVERROR_INVALIDDATA;

  1229.     }

  1230.     /* now we have the data and may start decoding */

  1231.     if ((ret = init_image(s, &frame)) < 0)

  1232.         return ret;

  1233. 

  1234.     if (s->strips == 1 && !s->stripsize) {

  1235.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1236.         s->stripsize = avpkt->size - s->stripoff;

  1237.     }

  1238. 

  1239.     if (s->stripsizesoff) {

  1240.         if (s->stripsizesoff >= (unsigned)avpkt->size)

  1241.             return AVERROR_INVALIDDATA;

  1242.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,

  1243.                          avpkt->size - s->stripsizesoff);

  1244.     }

  1245.     if (s->strippos) {

  1246.         if (s->strippos >= (unsigned)avpkt->size)

  1247.             return AVERROR_INVALIDDATA;

  1248.         bytestream2_init(&stripdata, avpkt->data + s->strippos,

  1249.                          avpkt->size - s->strippos);

  1250.     }

  1251. 

  1252.     if (s->rps <= 0) {

  1253.         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);

  1254.         return AVERROR_INVALIDDATA;

  1255.     }

  1256. 

  1257.     planes = s->planar ? s->bppcount : 1;

  1258.     for (plane = 0; plane < planes; plane++) {

  1259.         stride = p->linesize[plane];

  1260.         dst = p->data[plane];

  1261.         for (i = 0; i < s->height; i += s->rps) {

  1262.             if (s->stripsizesoff)

  1263.                 ssize = ff_tget(&stripsizes, s->sstype, le);

  1264.             else

  1265.                 ssize = s->stripsize;

  1266. 

  1267.             if (s->strippos)

  1268.                 soff = ff_tget(&stripdata, s->sot, le);

  1269.             else

  1270.                 soff = s->stripoff;

  1271. 

  1272.             if (soff > avpkt->size || ssize > avpkt->size - soff) {

  1273.                 av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1274.                 return AVERROR_INVALIDDATA;

  1275.             }

  1276.             if ((ret = tiff_unpack_strip(s, p, dst, stride, avpkt->data + soff, ssize, i,

  1277.                                          FFMIN(s->rps, s->height - i))) < 0) {

  1278.                 if (avctx->err_recognition & AV_EF_EXPLODE)

  1279.                     return ret;

  1280.                 break;

  1281.             }

  1282.             dst += s->rps * stride;

  1283.         }

  1284.         if (s->predictor == 2) {

  1285.             if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {

  1286.                 av_log(s->avctx, AV_LOG_ERROR, "predictor == 2 with YUV is unsupported");

  1287.                 return AVERROR_PATCHWELCOME;

  1288.             }

  1289.             dst   = p->data[plane];

  1290.             soff  = s->bpp >> 3;

  1291.             if (s->planar)

  1292.                 soff  = FFMAX(soff / s->bppcount, 1);

  1293.             ssize = s->width * soff;

  1294.             if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1295.                 s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||

  1296.                 s->avctx->pix_fmt == AV_PIX_FMT_GRAY16LE ||

  1297.                 s->avctx->pix_fmt == AV_PIX_FMT_YA16LE ||

  1298.                 s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||

  1299.                 s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {

  1300.                 for (i = 0; i < s->height; i++) {

  1301.                     for (j = soff; j < ssize; j += 2)

  1302.                         AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1303.                     dst += stride;

  1304.                 }

  1305.             } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1306.                        s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||

  1307.                        s->avctx->pix_fmt == AV_PIX_FMT_GRAY16BE ||

  1308.                        s->avctx->pix_fmt == AV_PIX_FMT_YA16BE ||

  1309.                        s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||

  1310.                        s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {

  1311.                 for (i = 0; i < s->height; i++) {

  1312.                     for (j = soff; j < ssize; j += 2)

  1313.                         AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1314.                     dst += stride;

  1315.                 }

  1316.             } else {

  1317.                 for (i = 0; i < s->height; i++) {

  1318.                     for (j = soff; j < ssize; j++)

  1319.                         dst[j] += dst[j - soff];

  1320.                     dst += stride;

  1321.                 }

  1322.             }

  1323.         }

  1324. 

  1325.         if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {

  1326.             dst = p->data[plane];

  1327.             for (i = 0; i < s->height; i++) {

  1328.                 for (j = 0; j < stride; j++)

  1329.                     dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];

  1330.                 dst += stride;

  1331.             }

  1332.         }

  1333.     }

  1334. 

  1335.     if (s->planar && s->bppcount > 2) {

  1336.         FFSWAP(uint8_t*, p->data[0],     p->data[2]);

  1337.         FFSWAP(int,      p->linesize[0], p->linesize[2]);

  1338.         FFSWAP(uint8_t*, p->data[0],     p->data[1]);

  1339.         FFSWAP(int,      p->linesize[0], p->linesize[1]);

  1340.     }

  1341. 

  1342.     *got_frame = 1;

  1343. 

  1344.     return avpkt->size;

  1345. }

  1346. 

  1347. static av_cold int tiff_init(AVCodecContext *avctx)

  1348. {

  1349.     TiffContext *s = avctx->priv_data;

  1350. 

  1351.     s->width  = 0;

  1352.     s->height = 0;

  1353.     s->subsampling[0] =

  1354.     s->subsampling[1] = 1;

  1355.     s->avctx  = avctx;

  1356.     ff_lzw_decode_open(&s->lzw);

  1357.     ff_ccitt_unpack_init();

  1358. 

  1359.     return 0;

  1360. }

  1361. 

  1362. static av_cold int tiff_end(AVCodecContext *avctx)

  1363. {

  1364.     TiffContext *const s = avctx->priv_data;

  1365. 

  1366.     free_geotags(s);

  1367. 

  1368.     ff_lzw_decode_close(&s->lzw);

  1369.     av_freep(&s->deinvert_buf);

  1370.     return 0;

  1371. }

  1372. 

  1373. AVCodec ff_tiff_decoder = {

  1374.     .name           = "tiff",

  1375.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1376.     .type           = AVMEDIA_TYPE_VIDEO,

  1377.     .id             = AV_CODEC_ID_TIFF,

  1378.     .priv_data_size = sizeof(TiffContext),

  1379.     .init           = tiff_init,

  1380.     .close          = tiff_end,

  1381.     .decode         = decode_frame,

  1382.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(tiff_init),

  1383.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,

  1384. };