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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. #include <lzma.h>

  33. #endif

  34. 

  35. #include "libavutil/attributes.h"

  36. #include "libavutil/avstring.h"

  37. #include "libavutil/intreadwrite.h"

  38. #include "libavutil/imgutils.h"

  39. #include "avcodec.h"

  40. #include "bytestream.h"

  41. #include "faxcompr.h"

  42. #include "internal.h"

  43. #include "lzw.h"

  44. #include "mathops.h"

  45. #include "tiff.h"

  46. #include "tiff_data.h"

  47. #include "thread.h"

  48. 

  49. typedef struct TiffContext {

  50.     AVCodecContext *avctx;

  51.     GetByteContext gb;

  52. 

  53.     int width, height;

  54.     unsigned int bpp, bppcount;

  55.     uint32_t palette[256];

  56.     int palette_is_set;

  57.     int le;

  58.     enum TiffCompr compr;

  59.     enum TiffPhotometric photometric;

  60.     int planar;

  61.     int subsampling[2];

  62.     int fax_opts;

  63.     int predictor;

  64.     int fill_order;

  65.     uint32_t res[4];

  66. 

  67.     int strips, rps, sstype;

  68.     int sot;

  69.     int stripsizesoff, stripsize, stripoff, strippos;

  70.     LZWState *lzw;

  71. 

  72.     uint8_t *deinvert_buf;

  73.     int deinvert_buf_size;

  74.     uint8_t *yuv_line;

  75.     unsigned int yuv_line_size;

  76. 

  77.     int geotag_count;

  78.     TiffGeoTag *geotags;

  79. } TiffContext;

  80. 

  81. static void free_geotags(TiffContext *const s)

  82. {

  83.     int i;

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

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

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

  87.     }

  88.     av_freep(&s->geotags);

  89.     s->geotag_count = 0;

  90. }

  91. 

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

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

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

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

  96. 

  97. static const char *get_geokey_name(int key)

  98. {

  99.     RET_GEOKEY(VERT, vert, name);

  100.     RET_GEOKEY(PROJ, proj, name);

  101.     RET_GEOKEY(GEOG, geog, name);

  102.     RET_GEOKEY(CONF, conf, name);

  103. 

  104.     return NULL;

  105. }

  106. 

  107. static int get_geokey_type(int key)

  108. {

  109.     RET_GEOKEY(VERT, vert, type);

  110.     RET_GEOKEY(PROJ, proj, type);

  111.     RET_GEOKEY(GEOG, geog, type);

  112.     RET_GEOKEY(CONF, conf, type);

  113. 

  114.     return AVERROR_INVALIDDATA;

  115. }

  116. 

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

  118. {

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

  120. }

  121. 

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

  123. {

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

  125.     if(r)

  126.         return r->name;

  127. 

  128.     return NULL;

  129. }

  130. 

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

  132. {

  133.     char *ap;

  134. 

  135.     if (val == TIFF_GEO_KEY_UNDEFINED)

  136.         return av_strdup("undefined");

  137.     if (val == TIFF_GEO_KEY_USER_DEFINED)

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

  139. 

  140. #define RET_GEOKEY_VAL(TYPE, array)\

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

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

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

  144. 

  145.     switch (key) {

  146.     case TIFF_GT_MODEL_TYPE_GEOKEY:

  147.         RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);

  148.         break;

  149.     case TIFF_GT_RASTER_TYPE_GEOKEY:

  150.         RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);

  151.         break;

  152.     case TIFF_GEOG_LINEAR_UNITS_GEOKEY:

  153.     case TIFF_PROJ_LINEAR_UNITS_GEOKEY:

  154.     case TIFF_VERTICAL_UNITS_GEOKEY:

  155.         RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);

  156.         break;

  157.     case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:

  158.     case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:

  159.         RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);

  160.         break;

  161.     case TIFF_GEOGRAPHIC_TYPE_GEOKEY:

  162.         RET_GEOKEY_VAL(GCS_TYPE, gcs_type);

  163.         RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);

  164.         break;

  165.     case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:

  166.         RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);

  167.         RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);

  168.         break;

  169.     case TIFF_GEOG_ELLIPSOID_GEOKEY:

  170.         RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);

  171.         break;

  172.     case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:

  173.         RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);

  174.         break;

  175.     case TIFF_PROJECTED_CS_TYPE_GEOKEY:

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

  177.         if(ap) return ap;

  178.         break;

  179.     case TIFF_PROJECTION_GEOKEY:

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

  181.         if(ap) return ap;

  182.         break;

  183.     case TIFF_PROJ_COORD_TRANS_GEOKEY:

  184.         RET_GEOKEY_VAL(COORD_TRANS, coord_trans);

  185.         break;

  186.     case TIFF_VERTICAL_CS_TYPE_GEOKEY:

  187.         RET_GEOKEY_VAL(VERT_CS, vert_cs);

  188.         RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);

  189.         break;

  190. 

  191.     }

  192. 

  193.     ap = av_malloc(14);

  194.     if (ap)

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

  196.     return ap;

  197. }

  198. 

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

  200. {

  201.     int i;

  202.     char *ap, *ap0;

  203.     uint64_t component_len;

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

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

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

  207.         return NULL;

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

  209.     if (!ap)

  210.         return NULL;

  211.     ap0   = ap;

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

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

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

  215.         if(l >= component_len) {

  216.             av_free(ap0);

  217.             return NULL;

  218.         }

  219.         ap += l;

  220.     }

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

  222.     return ap0;

  223. }

  224. 

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

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

  227. {

  228.     switch(type) {

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

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

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

  232.     default         : return AVERROR_INVALIDDATA;

  233.     };

  234. }

  235. 

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

  237.                                              int usePtr, const uint8_t *src,

  238.                                              uint8_t c, int width, int offset)

  239. {

  240.     switch (bpp) {

  241.     case 1:

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

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

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

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

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

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

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

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

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

  251.         }

  252.         break;

  253.     case 2:

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

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

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

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

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

  259.         }

  260.         break;

  261.     case 4:

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

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

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

  265.         }

  266.         break;

  267.     default:

  268.         if (usePtr) {

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

  270.         } else {

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

  272.         }

  273.     }

  274. }

  275. 

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

  277. {

  278.     int i;

  279. 

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

  281.     if (!s->deinvert_buf)

  282.         return AVERROR(ENOMEM);

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

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

  285. 

  286.     return 0;

  287. }

  288. 

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

  290.                        const uint8_t *src, int lnum)

  291. {

  292.     int i, j, k;

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

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

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

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

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

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

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

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

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

  302.             *pu++ = *src++;

  303.             *pv++ = *src++;

  304.         }

  305.     }else{

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

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

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

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

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

  311.             *pu++ = *src++;

  312.             *pv++ = *src++;

  313.         }

  314.     }

  315. }

  316. 

  317. #if CONFIG_ZLIB

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

  319.                            int size)

  320. {

  321.     z_stream zstream = { 0 };

  322.     int zret;

  323. 

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

  325.     zstream.avail_in  = size;

  326.     zstream.next_out  = dst;

  327.     zstream.avail_out = *len;

  328.     zret              = inflateInit(&zstream);

  329.     if (zret != Z_OK) {

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

  331.         return zret;

  332.     }

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

  334.     inflateEnd(&zstream);

  335.     *len = zstream.total_out;

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

  337. }

  338. 

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

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

  341.                             int strip_start, int is_yuv)

  342. {

  343.     uint8_t *zbuf;

  344.     unsigned long outlen;

  345.     int ret, line;

  346.     outlen = width * lines;

  347.     zbuf   = av_malloc(outlen);

  348.     if (!zbuf)

  349.         return AVERROR(ENOMEM);

  350.     if (s->fill_order) {

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

  352.             av_free(zbuf);

  353.             return ret;

  354.         }

  355.         src = s->deinvert_buf;

  356.     }

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

  358.     if (ret != Z_OK) {

  359.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  362.         av_free(zbuf);

  363.         return AVERROR_UNKNOWN;

  364.     }

  365.     src = zbuf;

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

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

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

  369.         } else {

  370.             memcpy(dst, src, width);

  371.         }

  372.         if (is_yuv) {

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

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

  375.         }

  376.         dst += stride;

  377.         src += width;

  378.     }

  379.     av_free(zbuf);

  380.     return 0;

  381. }

  382. #endif

  383. 

  384. #if CONFIG_LZMA

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

  386.                                 int size)

  387. {

  388.     lzma_stream stream = LZMA_STREAM_INIT;

  389.     lzma_ret ret;

  390. 

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

  392.     stream.avail_in  = size;

  393.     stream.next_out  = dst;

  394.     stream.avail_out = *len;

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

  396.     if (ret != LZMA_OK) {

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

  398.         return ret;

  399.     }

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

  401.     lzma_end(&stream);

  402.     *len = stream.total_out;

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

  404. }

  405. 

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

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

  408.                             int strip_start, int is_yuv)

  409. {

  410.     uint64_t outlen = width * lines;

  411.     int ret, line;

  412.     uint8_t *buf = av_malloc(outlen);

  413.     if (!buf)

  414.         return AVERROR(ENOMEM);

  415.     if (s->fill_order) {

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

  417.             av_free(buf);

  418.             return ret;

  419.         }

  420.         src = s->deinvert_buf;

  421.     }

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

  423.     if (ret != LZMA_OK) {

  424.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  427.         av_free(buf);

  428.         return AVERROR_UNKNOWN;

  429.     }

  430.     src = buf;

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

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

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

  434.         } else {

  435.             memcpy(dst, src, width);

  436.         }

  437.         if (is_yuv) {

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

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

  440.         }

  441.         dst += stride;

  442.         src += width;

  443.     }

  444.     av_free(buf);

  445.     return 0;

  446. }

  447. #endif

  448. 

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

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

  451. {

  452.     int i, ret = 0;

  453.     int line;

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

  455.                               FF_INPUT_BUFFER_PADDING_SIZE);

  456. 

  457.     if (!src2) {

  458.         av_log(s->avctx, AV_LOG_ERROR,

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

  460.         return AVERROR(ENOMEM);

  461.     }

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

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

  464.         av_free(src2);

  465.         return AVERROR_PATCHWELCOME;

  466.     }

  467.     if (!s->fill_order) {

  468.         memcpy(src2, src, size);

  469.     } else {

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

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

  472.     }

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

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

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

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

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

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

  479.             dst += stride;

  480.         }

  481.     av_free(src2);

  482.     return ret;

  483. }

  484. 

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

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

  487. {

  488.     PutByteContext pb;

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

  490.     const uint8_t *ssrc = src;

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

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

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

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

  495.                  desc->nb_components >= 3;

  496. 

  497.     if (s->planar)

  498.         width /= s->bppcount;

  499. 

  500.     if (size <= 0)

  501.         return AVERROR_INVALIDDATA;

  502. 

  503.     if (is_yuv) {

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

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

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

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

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

  509.             return AVERROR(ENOMEM);

  510.         }

  511.         dst = s->yuv_line;

  512.         stride = 0;

  513. 

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

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

  516.         av_assert0(width <= bytes_per_row);

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

  518.     }

  519. 

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

  521. #if CONFIG_ZLIB

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

  523.                                 strip_start, is_yuv);

  524. #else

  525.         av_log(s->avctx, AV_LOG_ERROR,

  526.                "zlib support not enabled, "

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

  528.         return AVERROR(ENOSYS);

  529. #endif

  530.     }

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

  532. #if CONFIG_LZMA

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

  534.                                 strip_start, is_yuv);

  535. #else

  536.         av_log(s->avctx, AV_LOG_ERROR,

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

  538.         return AVERROR(ENOSYS);

  539. #endif

  540.     }

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

  542.         if (s->fill_order) {

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

  544.                 return ret;

  545.             ssrc = src = s->deinvert_buf;

  546.         }

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

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

  549.         }

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

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

  552.             return ret;

  553.         }

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

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

  556.             if (pixels < width) {

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

  558.                        pixels, width);

  559.                 return AVERROR_INVALIDDATA;

  560.             }

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

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

  563.             if (is_yuv) {

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

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

  566.             }

  567.             dst += stride;

  568.         }

  569.         return 0;

  570.     }

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

  572.         s->compr == TIFF_G3        ||

  573.         s->compr == TIFF_G4) {

  574.         if (is_yuv)

  575.             return AVERROR_INVALIDDATA;

  576. 

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

  578.     }

  579. 

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

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

  582. 

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

  584.         if (src - ssrc > size) {

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

  586.             return AVERROR_INVALIDDATA;

  587.         }

  588. 

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

  590.             break;

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

  592.         switch (s->compr) {

  593.         case TIFF_RAW:

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

  595.                 return AVERROR_INVALIDDATA;

  596. 

  597.             if (!s->fill_order) {

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

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

  600.             } else {

  601.                 int i;

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

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

  604.             }

  605.             src += width;

  606.             break;

  607.         case TIFF_PACKBITS:

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

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

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

  611.                     return AVERROR_INVALIDDATA;

  612.                 }

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

  614.                 if (code >= 0) {

  615.                     code++;

  616.                     if (pixels + code > width ||

  617.                         ssrc + size - src < code) {

  618.                         av_log(s->avctx, AV_LOG_ERROR,

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

  620.                         return AVERROR_INVALIDDATA;

  621.                     }

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

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

  624.                     src    += code;

  625.                     pixels += code;

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

  627.                     code = (-code) + 1;

  628.                     if (pixels + code > width) {

  629.                         av_log(s->avctx, AV_LOG_ERROR,

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

  631.                         return AVERROR_INVALIDDATA;

  632.                     }

  633.                     c = *src++;

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

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

  636.                     pixels += code;

  637.                 }

  638.             }

  639.             if (s->fill_order) {

  640.                 int i;

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

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

  643.             }

  644.             break;

  645.         }

  646.         if (is_yuv) {

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

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

  649.         }

  650.         dst += stride;

  651.     }

  652.     return 0;

  653. }

  654. 

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

  656. {

  657.     int ret;

  658.     int create_gray_palette = 0;

  659. 

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

  661.     case 11:

  662.         if (!s->palette_is_set) {

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

  664.             break;

  665.         }

  666.     case 21:

  667.     case 41:

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

  669.         if (!s->palette_is_set) {

  670.             create_gray_palette = 1;

  671.         }

  672.         break;

  673.     case 81:

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

  675.         break;

  676.     case 243:

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

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

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

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

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

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

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

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

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

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

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

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

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

  690.             } else {

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

  692.                 return AVERROR_PATCHWELCOME;

  693.             }

  694.         } else

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

  696.         break;

  697.     case 161:

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

  699.         break;

  700.     case 162:

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

  702.         break;

  703.     case 322:

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

  705.         break;

  706.     case 324:

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

  708.         break;

  709.     case 483:

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

  711.         break;

  712.     case 644:

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

  714.         break;

  715.     case 1243:

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

  717.         break;

  718.     case 1324:

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

  720.         break;

  721.     case 1483:

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

  723.         break;

  724.     case 1644:

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

  726.         break;

  727.     default:

  728.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  731.         return AVERROR_INVALIDDATA;

  732.     }

  733. 

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

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

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

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

  738.            desc->nb_components < 3) {

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

  740.             return AVERROR_INVALIDDATA;

  741.         }

  742.     }

  743. 

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

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

  746.         if (ret < 0)

  747.             return ret;

  748.     }

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

  750.         return ret;

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

  752.         if (!create_gray_palette)

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

  754.         else {

  755.             /* make default grayscale pal */

  756.             int i;

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

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

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

  760.         }

  761.     }

  762.     return 0;

  763. }

  764. 

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

  766. {

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

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

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

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

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

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

  773. }

  774. 

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

  776. {

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

  778.     int i, start;

  779.     int pos;

  780.     int ret;

  781.     double *dp;

  782. 

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

  784.     if (ret < 0) {

  785.         goto end;

  786.     }

  787. 

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

  789.     if (count == 1) {

  790.         switch (type) {

  791.         case TIFF_BYTE:

  792.         case TIFF_SHORT:

  793.         case TIFF_LONG:

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

  795.             break;

  796.         case TIFF_RATIONAL:

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

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

  799.             break;

  800.         case TIFF_STRING:

  801.             if (count <= 4) {

  802.                 break;

  803.             }

  804.         default:

  805.             value = UINT_MAX;

  806.         }

  807.     }

  808. 

  809.     switch (tag) {

  810.     case TIFF_WIDTH:

  811.         s->width = value;

  812.         break;

  813.     case TIFF_HEIGHT:

  814.         s->height = value;

  815.         break;

  816.     case TIFF_BPP:

  817.         s->bppcount = count;

  818.         if (count > 4) {

  819.             av_log(s->avctx, AV_LOG_ERROR,

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

  821.                    s->bpp, count);

  822.             return AVERROR_INVALIDDATA;

  823.         }

  824.         if (count == 1)

  825.             s->bpp = value;

  826.         else {

  827.             switch (type) {

  828.             case TIFF_BYTE:

  829.             case TIFF_SHORT:

  830.             case TIFF_LONG:

  831.                 s->bpp = 0;

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

  833.                     return AVERROR_INVALIDDATA;

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

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

  836.                 break;

  837.             default:

  838.                 s->bpp = -1;

  839.             }

  840.         }

  841.         break;

  842.     case TIFF_SAMPLES_PER_PIXEL:

  843.         if (count != 1) {

  844.             av_log(s->avctx, AV_LOG_ERROR,

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

  846.             return AVERROR_INVALIDDATA;

  847.         }

  848.         if (value > 4U) {

  849.             av_log(s->avctx, AV_LOG_ERROR,

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

  851.             return AVERROR_INVALIDDATA;

  852.         }

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

  854.             s->bpp *= value;

  855.         s->bppcount = value;

  856.         break;

  857.     case TIFF_COMPR:

  858.         s->compr     = value;

  859.         s->predictor = 0;

  860.         switch (s->compr) {

  861.         case TIFF_RAW:

  862.         case TIFF_PACKBITS:

  863.         case TIFF_LZW:

  864.         case TIFF_CCITT_RLE:

  865.             break;

  866.         case TIFF_G3:

  867.         case TIFF_G4:

  868.             s->fax_opts = 0;

  869.             break;

  870.         case TIFF_DEFLATE:

  871.         case TIFF_ADOBE_DEFLATE:

  872. #if CONFIG_ZLIB

  873.             break;

  874. #else

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

  876.             return AVERROR(ENOSYS);

  877. #endif

  878.         case TIFF_JPEG:

  879.         case TIFF_NEWJPEG:

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

  881.             return AVERROR_PATCHWELCOME;

  882.         case TIFF_LZMA:

  883. #if CONFIG_LZMA

  884.             break;

  885. #else

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

  887.             return AVERROR(ENOSYS);

  888. #endif

  889.         default:

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

  891.                    s->compr);

  892.             return AVERROR_INVALIDDATA;

  893.         }

  894.         break;

  895.     case TIFF_ROWSPERSTRIP:

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

  897.             value = s->height;

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

  899.         break;

  900.     case TIFF_STRIP_OFFS:

  901.         if (count == 1) {

  902.             s->strippos = 0;

  903.             s->stripoff = value;

  904.         } else

  905.             s->strippos = off;

  906.         s->strips = count;

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

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

  909.         s->sot = type;

  910.         break;

  911.     case TIFF_STRIP_SIZE:

  912.         if (count == 1) {

  913.             s->stripsizesoff = 0;

  914.             s->stripsize     = value;

  915.             s->strips        = 1;

  916.         } else {

  917.             s->stripsizesoff = off;

  918.         }

  919.         s->strips = count;

  920.         s->sstype = type;

  921.         break;

  922.     case TIFF_XRES:

  923.     case TIFF_YRES:

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

  925.         break;

  926.     case TIFF_TILE_BYTE_COUNTS:

  927.     case TIFF_TILE_LENGTH:

  928.     case TIFF_TILE_OFFSETS:

  929.     case TIFF_TILE_WIDTH:

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

  931.         return AVERROR_PATCHWELCOME;

  932.         break;

  933.     case TIFF_PREDICTOR:

  934.         s->predictor = value;

  935.         break;

  936.     case TIFF_PHOTOMETRIC:

  937.         switch (value) {

  938.         case TIFF_PHOTOMETRIC_WHITE_IS_ZERO:

  939.         case TIFF_PHOTOMETRIC_BLACK_IS_ZERO:

  940.         case TIFF_PHOTOMETRIC_RGB:

  941.         case TIFF_PHOTOMETRIC_PALETTE:

  942.         case TIFF_PHOTOMETRIC_YCBCR:

  943.             s->photometric = value;

  944.             break;

  945.         case TIFF_PHOTOMETRIC_ALPHA_MASK:

  946.         case TIFF_PHOTOMETRIC_SEPARATED:

  947.         case TIFF_PHOTOMETRIC_CIE_LAB:

  948.         case TIFF_PHOTOMETRIC_ICC_LAB:

  949.         case TIFF_PHOTOMETRIC_ITU_LAB:

  950.         case TIFF_PHOTOMETRIC_CFA:

  951.         case TIFF_PHOTOMETRIC_LOG_L:

  952.         case TIFF_PHOTOMETRIC_LOG_LUV:

  953.         case TIFF_PHOTOMETRIC_LINEAR_RAW:

  954.             avpriv_report_missing_feature(s->avctx,

  955.                                           "PhotometricInterpretation 0x%04X",

  956.                                           value);

  957.             return AVERROR_PATCHWELCOME;

  958.         default:

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

  960.                    "unknown\n", value);

  961.             return AVERROR_INVALIDDATA;

  962.         }

  963.         break;

  964.     case TIFF_FILL_ORDER:

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

  966.             av_log(s->avctx, AV_LOG_ERROR,

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

  968.             value = 1;

  969.         }

  970.         s->fill_order = value - 1;

  971.         break;

  972.     case TIFF_PAL: {

  973.         GetByteContext pal_gb[3];

  974.         off = type_sizes[type];

  975.         if (count / 3 > 256 ||

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

  977.             return AVERROR_INVALIDDATA;

  978. 

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

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

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

  982. 

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

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

  985.             uint32_t p = 0xFF000000;

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

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

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

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

  990.         }

  991.         s->palette_is_set = 1;

  992.         break;

  993.     }

  994.     case TIFF_PLANAR:

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

  996.         break;

  997.     case TIFF_YCBCR_SUBSAMPLING:

  998.         if (count != 2) {

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

  1000.             return AVERROR_INVALIDDATA;

  1001.         }

  1002.         for (i = 0; i < count; i++)

  1003.             s->subsampling[i] = ff_tget(&s->gb, type, s->le);

  1004.         break;

  1005.     case TIFF_T4OPTIONS:

  1006.         if (s->compr == TIFF_G3)

  1007.             s->fax_opts = value;

  1008.         break;

  1009.     case TIFF_T6OPTIONS:

  1010.         if (s->compr == TIFF_G4)

  1011.             s->fax_opts = value;

  1012.         break;

  1013. #define ADD_METADATA(count, name, sep)\

  1014.     if ((ret = add_metadata(count, type, name, sep, s, frame)) < 0) {\

  1015.         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\

  1016.         goto end;\

  1017.     }

  1018.     case TIFF_MODEL_PIXEL_SCALE:

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

  1020.         break;

  1021.     case TIFF_MODEL_TRANSFORMATION:

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

  1023.         break;

  1024.     case TIFF_MODEL_TIEPOINT:

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

  1026.         break;

  1027.     case TIFF_GEO_KEY_DIRECTORY:

  1028.         ADD_METADATA(1, "GeoTIFF_Version", NULL);

  1029.         ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");

  1030.         s->geotag_count   = ff_tget_short(&s->gb, s->le);

  1031.         if (s->geotag_count > count / 4 - 1) {

  1032.             s->geotag_count = count / 4 - 1;

  1033.             av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n");

  1034.         }

  1035.         if (bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4) {

  1036.             s->geotag_count = 0;

  1037.             return -1;

  1038.         }

  1039.         s->geotags = av_mallocz_array(s->geotag_count, sizeof(TiffGeoTag));

  1040.         if (!s->geotags) {

  1041.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1042.             s->geotag_count = 0;

  1043.             goto end;

  1044.         }

  1045.         for (i = 0; i < s->geotag_count; i++) {

  1046.             s->geotags[i].key    = ff_tget_short(&s->gb, s->le);

  1047.             s->geotags[i].type   = ff_tget_short(&s->gb, s->le);

  1048.             s->geotags[i].count  = ff_tget_short(&s->gb, s->le);

  1049. 

  1050.             if (!s->geotags[i].type)

  1051.                 s->geotags[i].val  = get_geokey_val(s->geotags[i].key, ff_tget_short(&s->gb, s->le));

  1052.             else

  1053.                 s->geotags[i].offset = ff_tget_short(&s->gb, s->le);

  1054.         }

  1055.         break;

  1056.     case TIFF_GEO_DOUBLE_PARAMS:

  1057.         if (count >= INT_MAX / sizeof(int64_t))

  1058.             return AVERROR_INVALIDDATA;

  1059.         if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))

  1060.             return AVERROR_INVALIDDATA;

  1061.         dp = av_malloc_array(count, sizeof(double));

  1062.         if (!dp) {

  1063.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1064.             goto end;

  1065.         }

  1066.         for (i = 0; i < count; i++)

  1067.             dp[i] = ff_tget_double(&s->gb, s->le);

  1068.         for (i = 0; i < s->geotag_count; i++) {

  1069.             if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) {

  1070.                 if (s->geotags[i].count == 0

  1071.                     || s->geotags[i].offset + s->geotags[i].count > count) {

  1072.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  1073.                 } else {

  1074.                     char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");

  1075.                     if (!ap) {

  1076.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1077.                         av_freep(&dp);

  1078.                         return AVERROR(ENOMEM);

  1079.                     }

  1080.                     s->geotags[i].val = ap;

  1081.                 }

  1082.             }

  1083.         }

  1084.         av_freep(&dp);

  1085.         break;

  1086.     case TIFF_GEO_ASCII_PARAMS:

  1087.         pos = bytestream2_tell(&s->gb);

  1088.         for (i = 0; i < s->geotag_count; i++) {

  1089.             if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) {

  1090.                 if (s->geotags[i].count == 0

  1091.                     || s->geotags[i].offset +  s->geotags[i].count > count) {

  1092.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  1093.                 } else {

  1094.                     char *ap;

  1095. 

  1096.                     bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);

  1097.                     if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)

  1098.                         return AVERROR_INVALIDDATA;

  1099.                     ap = av_malloc(s->geotags[i].count);

  1100.                     if (!ap) {

  1101.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1102.                         return AVERROR(ENOMEM);

  1103.                     }

  1104.                     bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);

  1105.                     ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte

  1106.                     s->geotags[i].val = ap;

  1107.                 }

  1108.             }

  1109.         }

  1110.         break;

  1111.     case TIFF_ARTIST:

  1112.         ADD_METADATA(count, "artist", NULL);

  1113.         break;

  1114.     case TIFF_COPYRIGHT:

  1115.         ADD_METADATA(count, "copyright", NULL);

  1116.         break;

  1117.     case TIFF_DATE:

  1118.         ADD_METADATA(count, "date", NULL);

  1119.         break;

  1120.     case TIFF_DOCUMENT_NAME:

  1121.         ADD_METADATA(count, "document_name", NULL);

  1122.         break;

  1123.     case TIFF_HOST_COMPUTER:

  1124.         ADD_METADATA(count, "computer", NULL);

  1125.         break;

  1126.     case TIFF_IMAGE_DESCRIPTION:

  1127.         ADD_METADATA(count, "description", NULL);

  1128.         break;

  1129.     case TIFF_MAKE:

  1130.         ADD_METADATA(count, "make", NULL);

  1131.         break;

  1132.     case TIFF_MODEL:

  1133.         ADD_METADATA(count, "model", NULL);

  1134.         break;

  1135.     case TIFF_PAGE_NAME:

  1136.         ADD_METADATA(count, "page_name", NULL);

  1137.         break;

  1138.     case TIFF_PAGE_NUMBER:

  1139.         ADD_METADATA(count, "page_number", " / ");

  1140.         break;

  1141.     case TIFF_SOFTWARE_NAME:

  1142.         ADD_METADATA(count, "software", NULL);

  1143.         break;

  1144.     default:

  1145.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  1146.             av_log(s->avctx, AV_LOG_ERROR,

  1147.                    "Unknown or unsupported tag %d/0X%0X\n",

  1148.                    tag, tag);

  1149.             return AVERROR_INVALIDDATA;

  1150.         }

  1151.     }

  1152. end:

  1153.     bytestream2_seek(&s->gb, start, SEEK_SET);

  1154.     return 0;

  1155. }

  1156. 

  1157. static int decode_frame(AVCodecContext *avctx,

  1158.                         void *data, int *got_frame, AVPacket *avpkt)

  1159. {

  1160.     TiffContext *const s = avctx->priv_data;

  1161.     AVFrame *const p = data;

  1162.     ThreadFrame frame = { .f = data };

  1163.     unsigned off;

  1164.     int le, ret, plane, planes;

  1165.     int i, j, entries, stride;

  1166.     unsigned soff, ssize;

  1167.     uint8_t *dst;

  1168.     GetByteContext stripsizes;

  1169.     GetByteContext stripdata;

  1170. 

  1171.     bytestream2_init(&s->gb, avpkt->data, avpkt->size);

  1172. 

  1173.     // parse image header

  1174.     if ((ret = ff_tdecode_header(&s->gb, &le, &off))) {

  1175.         av_log(avctx, AV_LOG_ERROR, "Invalid TIFF header\n");

  1176.         return ret;

  1177.     } else if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {

  1178.         av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");

  1179.         return AVERROR_INVALIDDATA;

  1180.     }

  1181.     s->le          = le;

  1182.     // TIFF_BPP is not a required tag and defaults to 1

  1183.     s->bppcount    = s->bpp = 1;

  1184.     s->photometric = TIFF_PHOTOMETRIC_NONE;

  1185.     s->compr       = TIFF_RAW;

  1186.     s->fill_order  = 0;

  1187.     free_geotags(s);

  1188. 

  1189.     // Reset these offsets so we can tell if they were set this frame

  1190.     s->stripsizesoff = s->strippos = 0;

  1191.     /* parse image file directory */

  1192.     bytestream2_seek(&s->gb, off, SEEK_SET);

  1193.     entries = ff_tget_short(&s->gb, le);

  1194.     if (bytestream2_get_bytes_left(&s->gb) < entries * 12)

  1195.         return AVERROR_INVALIDDATA;

  1196.     for (i = 0; i < entries; i++) {

  1197.         if ((ret = tiff_decode_tag(s, p)) < 0)

  1198.             return ret;

  1199.     }

  1200. 

  1201.     for (i = 0; i<s->geotag_count; i++) {

  1202.         const char *keyname = get_geokey_name(s->geotags[i].key);

  1203.         if (!keyname) {

  1204.             av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);

  1205.             continue;

  1206.         }

  1207.         if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {

  1208.             av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);

  1209.             continue;

  1210.         }

  1211.         ret = av_dict_set(avpriv_frame_get_metadatap(p), keyname, s->geotags[i].val, 0);

  1212.         if (ret<0) {

  1213.             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);

  1214.             return ret;

  1215.         }

  1216.     }

  1217. 

  1218.     if (!s->strippos && !s->stripoff) {

  1219.         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");

  1220.         return AVERROR_INVALIDDATA;

  1221.     }

  1222.     /* now we have the data and may start decoding */

  1223.     if ((ret = init_image(s, &frame)) < 0)

  1224.         return ret;

  1225. 

  1226.     if (s->strips == 1 && !s->stripsize) {

  1227.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1228.         s->stripsize = avpkt->size - s->stripoff;

  1229.     }

  1230. 

  1231.     if (s->stripsizesoff) {

  1232.         if (s->stripsizesoff >= (unsigned)avpkt->size)

  1233.             return AVERROR_INVALIDDATA;

  1234.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,

  1235.                          avpkt->size - s->stripsizesoff);

  1236.     }

  1237.     if (s->strippos) {

  1238.         if (s->strippos >= (unsigned)avpkt->size)

  1239.             return AVERROR_INVALIDDATA;

  1240.         bytestream2_init(&stripdata, avpkt->data + s->strippos,

  1241.                          avpkt->size - s->strippos);

  1242.     }

  1243. 

  1244.     if (s->rps <= 0) {

  1245.         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);

  1246.         return AVERROR_INVALIDDATA;

  1247.     }

  1248. 

  1249.     planes = s->planar ? s->bppcount : 1;

  1250.     for (plane = 0; plane < planes; plane++) {

  1251.         stride = p->linesize[plane];

  1252.         dst    = p->data[plane];

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

  1254.         if (s->stripsizesoff)

  1255.             ssize = ff_tget(&stripsizes, s->sstype, le);

  1256.         else

  1257.             ssize = s->stripsize;

  1258. 

  1259.         if (s->strippos)

  1260.             soff = ff_tget(&stripdata, s->sot, le);

  1261.         else

  1262.             soff = s->stripoff;

  1263. 

  1264.         if (soff > avpkt->size || ssize > avpkt->size - soff) {

  1265.             av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1266.             return AVERROR_INVALIDDATA;

  1267.         }

  1268.         if ((ret = tiff_unpack_strip(s, p, dst, stride, avpkt->data + soff, ssize, i,

  1269.                                      FFMIN(s->rps, s->height - i))) < 0) {

  1270.             if (avctx->err_recognition & AV_EF_EXPLODE)

  1271.                 return ret;

  1272.             break;

  1273.         }

  1274.         dst += s->rps * stride;

  1275.     }

  1276.     if (s->predictor == 2) {

  1277.         if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {

  1278.             av_log(s->avctx, AV_LOG_ERROR, "predictor == 2 with YUV is unsupported");

  1279.             return AVERROR_PATCHWELCOME;

  1280.         }

  1281.         dst   = p->data[plane];

  1282.         soff  = s->bpp >> 3;

  1283.         if (s->planar)

  1284.             soff  = FFMAX(soff / s->bppcount, 1);

  1285.         ssize = s->width * soff;

  1286.         if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1287.             s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||

  1288.             s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||

  1289.             s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {

  1290.             for (i = 0; i < s->height; i++) {

  1291.                 for (j = soff; j < ssize; j += 2)

  1292.                     AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1293.                 dst += stride;

  1294.             }

  1295.         } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1296.                    s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||

  1297.                    s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||

  1298.                    s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {

  1299.             for (i = 0; i < s->height; i++) {

  1300.                 for (j = soff; j < ssize; j += 2)

  1301.                     AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1302.                 dst += stride;

  1303.             }

  1304.         } else {

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

  1306.                 for (j = soff; j < ssize; j++)

  1307.                     dst[j] += dst[j - soff];

  1308.                 dst += stride;

  1309.             }

  1310.         }

  1311.     }

  1312. 

  1313.     if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {

  1314.         dst = p->data[plane];

  1315.         for (i = 0; i < s->height; i++) {

  1316.             for (j = 0; j < p->linesize[plane]; j++)

  1317.                 dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];

  1318.             dst += stride;

  1319.         }

  1320.     }

  1321.     }

  1322. 

  1323.     if (s->planar && s->bppcount > 2) {

  1324.         FFSWAP(uint8_t*, p->data[0],     p->data[2]);

  1325.         FFSWAP(int,      p->linesize[0], p->linesize[2]);

  1326.         FFSWAP(uint8_t*, p->data[0],     p->data[1]);

  1327.         FFSWAP(int,      p->linesize[0], p->linesize[1]);

  1328.     }

  1329. 

  1330.     *got_frame = 1;

  1331. 

  1332.     return avpkt->size;

  1333. }

  1334. 

  1335. static av_cold int tiff_init(AVCodecContext *avctx)

  1336. {

  1337.     TiffContext *s = avctx->priv_data;

  1338. 

  1339.     s->width  = 0;

  1340.     s->height = 0;

  1341.     s->subsampling[0] =

  1342.     s->subsampling[1] = 1;

  1343.     s->avctx  = avctx;

  1344.     ff_lzw_decode_open(&s->lzw);

  1345.     ff_ccitt_unpack_init();

  1346. 

  1347.     return 0;

  1348. }

  1349. 

  1350. static av_cold int tiff_end(AVCodecContext *avctx)

  1351. {

  1352.     TiffContext *const s = avctx->priv_data;

  1353. 

  1354.     free_geotags(s);

  1355. 

  1356.     ff_lzw_decode_close(&s->lzw);

  1357.     av_freep(&s->deinvert_buf);

  1358.     return 0;

  1359. }

  1360. 

  1361. AVCodec ff_tiff_decoder = {

  1362.     .name           = "tiff",

  1363.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1364.     .type           = AVMEDIA_TYPE_VIDEO,

  1365.     .id             = AV_CODEC_ID_TIFF,

  1366.     .priv_data_size = sizeof(TiffContext),

  1367.     .init           = tiff_init,

  1368.     .close          = tiff_end,

  1369.     .decode         = decode_frame,

  1370.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(tiff_init),

  1371.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,

  1372. };