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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 "libavutil/opt.h"

  41. #include "avcodec.h"

  42. #include "bytestream.h"

  43. #include "faxcompr.h"

  44. #include "internal.h"

  45. #include "lzw.h"

  46. #include "mathops.h"

  47. #include "tiff.h"

  48. #include "tiff_data.h"

  49. #include "thread.h"

  50. #include "get_bits.h"

  51. 

  52. typedef struct TiffContext {

  53.     AVClass *class;

  54.     AVCodecContext *avctx;

  55.     GetByteContext gb;

  56. 

  57.     int get_subimage;

  58. 

  59.     int width, height;

  60.     unsigned int bpp, bppcount;

  61.     uint32_t palette[256];

  62.     int palette_is_set;

  63.     int le;

  64.     enum TiffCompr compr;

  65.     enum TiffPhotometric photometric;

  66.     int planar;

  67.     int subsampling[2];

  68.     int fax_opts;

  69.     int predictor;

  70.     int fill_order;

  71.     uint32_t res[4];

  72. 

  73.     int is_bayer;

  74.     uint8_t pattern[4];

  75.     unsigned white_level;

  76. 

  77.     uint32_t sub_ifd;

  78. 

  79.     int strips, rps, sstype;

  80.     int sot;

  81.     int stripsizesoff, stripsize, stripoff, strippos;

  82.     LZWState *lzw;

  83. 

  84.     uint8_t *deinvert_buf;

  85.     int deinvert_buf_size;

  86.     uint8_t *yuv_line;

  87.     unsigned int yuv_line_size;

  88.     uint8_t *fax_buffer;

  89.     unsigned int fax_buffer_size;

  90. 

  91.     int geotag_count;

  92.     TiffGeoTag *geotags;

  93. } TiffContext;

  94. 

  95. static void free_geotags(TiffContext *const s)

  96. {

  97.     int i;

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

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

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

  101.     }

  102.     av_freep(&s->geotags);

  103.     s->geotag_count = 0;

  104. }

  105. 

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

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

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

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

  110. 

  111. static const char *get_geokey_name(int key)

  112. {

  113.     RET_GEOKEY(VERT, vert, name);

  114.     RET_GEOKEY(PROJ, proj, name);

  115.     RET_GEOKEY(GEOG, geog, name);

  116.     RET_GEOKEY(CONF, conf, name);

  117. 

  118.     return NULL;

  119. }

  120. 

  121. static int get_geokey_type(int key)

  122. {

  123.     RET_GEOKEY(VERT, vert, type);

  124.     RET_GEOKEY(PROJ, proj, type);

  125.     RET_GEOKEY(GEOG, geog, type);

  126.     RET_GEOKEY(CONF, conf, type);

  127. 

  128.     return AVERROR_INVALIDDATA;

  129. }

  130. 

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

  132. {

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

  134. }

  135. 

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

  137. {

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

  139.     if(r)

  140.         return r->name;

  141. 

  142.     return NULL;

  143. }

  144. 

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

  146. {

  147.     char *ap;

  148. 

  149.     if (val == TIFF_GEO_KEY_UNDEFINED)

  150.         return av_strdup("undefined");

  151.     if (val == TIFF_GEO_KEY_USER_DEFINED)

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

  153. 

  154. #define RET_GEOKEY_VAL(TYPE, array)\

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

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

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

  158. 

  159.     switch (key) {

  160.     case TIFF_GT_MODEL_TYPE_GEOKEY:

  161.         RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);

  162.         break;

  163.     case TIFF_GT_RASTER_TYPE_GEOKEY:

  164.         RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);

  165.         break;

  166.     case TIFF_GEOG_LINEAR_UNITS_GEOKEY:

  167.     case TIFF_PROJ_LINEAR_UNITS_GEOKEY:

  168.     case TIFF_VERTICAL_UNITS_GEOKEY:

  169.         RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);

  170.         break;

  171.     case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:

  172.     case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:

  173.         RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);

  174.         break;

  175.     case TIFF_GEOGRAPHIC_TYPE_GEOKEY:

  176.         RET_GEOKEY_VAL(GCS_TYPE, gcs_type);

  177.         RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);

  178.         break;

  179.     case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:

  180.         RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);

  181.         RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);

  182.         break;

  183.     case TIFF_GEOG_ELLIPSOID_GEOKEY:

  184.         RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);

  185.         break;

  186.     case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:

  187.         RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);

  188.         break;

  189.     case TIFF_PROJECTED_CS_TYPE_GEOKEY:

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

  191.         if(ap) return ap;

  192.         break;

  193.     case TIFF_PROJECTION_GEOKEY:

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

  195.         if(ap) return ap;

  196.         break;

  197.     case TIFF_PROJ_COORD_TRANS_GEOKEY:

  198.         RET_GEOKEY_VAL(COORD_TRANS, coord_trans);

  199.         break;

  200.     case TIFF_VERTICAL_CS_TYPE_GEOKEY:

  201.         RET_GEOKEY_VAL(VERT_CS, vert_cs);

  202.         RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);

  203.         break;

  204. 

  205.     }

  206. 

  207.     ap = av_malloc(14);

  208.     if (ap)

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

  210.     return ap;

  211. }

  212. 

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

  214. {

  215.     int i;

  216.     char *ap, *ap0;

  217.     uint64_t component_len;

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

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

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

  221.         return NULL;

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

  223.     if (!ap)

  224.         return NULL;

  225.     ap0   = ap;

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

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

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

  229.         if(l >= component_len) {

  230.             av_free(ap0);

  231.             return NULL;

  232.         }

  233.         ap += l;

  234.     }

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

  236.     return ap0;

  237. }

  238. 

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

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

  241. {

  242.     switch(type) {

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

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

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

  246.     default         : return AVERROR_INVALIDDATA;

  247.     };

  248. }

  249. 

  250. static void av_always_inline horizontal_fill(TiffContext *s,

  251.                                              unsigned int bpp, uint8_t* dst,

  252.                                              int usePtr, const uint8_t *src,

  253.                                              uint8_t c, int width, int offset)

  254. {

  255.     switch (bpp) {

  256.     case 1:

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

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

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

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

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

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

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

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

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

  266.         }

  267.         break;

  268.     case 2:

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

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

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

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

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

  274.         }

  275.         break;

  276.     case 4:

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

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

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

  280.         }

  281.         break;

  282.     case 12: {

  283.                  uint16_t *dst16 = (uint16_t *)dst;

  284.                  GetBitContext gb;

  285.                  init_get_bits8(&gb, src, width);

  286.                  for (int i = 0; i < s->width; i++) {

  287.                      dst16[i] = get_bits(&gb, 12) << 4;

  288.                  }

  289.              }

  290.         break;

  291.     default:

  292.         if (usePtr) {

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

  294.         } else {

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

  296.         }

  297.     }

  298. }

  299. 

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

  301. {

  302.     int i;

  303. 

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

  305.     if (!s->deinvert_buf)

  306.         return AVERROR(ENOMEM);

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

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

  309. 

  310.     return 0;

  311. }

  312. 

  313. static void unpack_gray(TiffContext *s, AVFrame *p,

  314.                        const uint8_t *src, int lnum, int width, int bpp)

  315. {

  316.     GetBitContext gb;

  317.     uint16_t *dst = (uint16_t *)(p->data[0] + lnum * p->linesize[0]);

  318. 

  319.     init_get_bits8(&gb, src, width);

  320. 

  321.     for (int i = 0; i < s->width; i++) {

  322.         dst[i] = get_bits(&gb, bpp);

  323.     }

  324. }

  325. 

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

  327.                        const uint8_t *src, int lnum)

  328. {

  329.     int i, j, k;

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

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

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

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

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

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

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

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

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

  339.             *pu++ = *src++;

  340.             *pv++ = *src++;

  341.         }

  342.     }else{

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

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

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

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

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

  348.             *pu++ = *src++;

  349.             *pv++ = *src++;

  350.         }

  351.     }

  352. }

  353. 

  354. #if CONFIG_ZLIB

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

  356.                            int size)

  357. {

  358.     z_stream zstream = { 0 };

  359.     int zret;

  360. 

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

  362.     zstream.avail_in  = size;

  363.     zstream.next_out  = dst;

  364.     zstream.avail_out = *len;

  365.     zret              = inflateInit(&zstream);

  366.     if (zret != Z_OK) {

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

  368.         return zret;

  369.     }

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

  371.     inflateEnd(&zstream);

  372.     *len = zstream.total_out;

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

  374. }

  375. 

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

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

  378.                             int strip_start, int is_yuv)

  379. {

  380.     uint8_t *zbuf;

  381.     unsigned long outlen;

  382.     int ret, line;

  383.     outlen = width * lines;

  384.     zbuf   = av_malloc(outlen);

  385.     if (!zbuf)

  386.         return AVERROR(ENOMEM);

  387.     if (s->fill_order) {

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

  389.             av_free(zbuf);

  390.             return ret;

  391.         }

  392.         src = s->deinvert_buf;

  393.     }

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

  395.     if (ret != Z_OK) {

  396.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  399.         av_free(zbuf);

  400.         return AVERROR_UNKNOWN;

  401.     }

  402.     src = zbuf;

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

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

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

  406.         } else {

  407.             memcpy(dst, src, width);

  408.         }

  409.         if (is_yuv) {

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

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

  412.         }

  413.         dst += stride;

  414.         src += width;

  415.     }

  416.     av_free(zbuf);

  417.     return 0;

  418. }

  419. #endif

  420. 

  421. #if CONFIG_LZMA

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

  423.                                 int size)

  424. {

  425.     lzma_stream stream = LZMA_STREAM_INIT;

  426.     lzma_ret ret;

  427. 

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

  429.     stream.avail_in  = size;

  430.     stream.next_out  = dst;

  431.     stream.avail_out = *len;

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

  433.     if (ret != LZMA_OK) {

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

  435.         return ret;

  436.     }

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

  438.     lzma_end(&stream);

  439.     *len = stream.total_out;

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

  441. }

  442. 

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

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

  445.                             int strip_start, int is_yuv)

  446. {

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

  448.     int ret, line;

  449.     uint8_t *buf = av_malloc(outlen);

  450.     if (!buf)

  451.         return AVERROR(ENOMEM);

  452.     if (s->fill_order) {

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

  454.             av_free(buf);

  455.             return ret;

  456.         }

  457.         src = s->deinvert_buf;

  458.     }

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

  460.     if (ret != LZMA_OK) {

  461.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  464.         av_free(buf);

  465.         return AVERROR_UNKNOWN;

  466.     }

  467.     src = buf;

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

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

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

  471.         } else {

  472.             memcpy(dst, src, width);

  473.         }

  474.         if (is_yuv) {

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

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

  477.         }

  478.         dst += stride;

  479.         src += width;

  480.     }

  481.     av_free(buf);

  482.     return 0;

  483. }

  484. #endif

  485. 

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

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

  488. {

  489.     int i, ret = 0;

  490.     int line;

  491.     uint8_t *src2;

  492. 

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

  494.     src2 = s->fax_buffer;

  495. 

  496.     if (!src2) {

  497.         av_log(s->avctx, AV_LOG_ERROR,

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

  499.         return AVERROR(ENOMEM);

  500.     }

  501. 

  502.     if (!s->fill_order) {

  503.         memcpy(src2, src, size);

  504.     } else {

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

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

  507.     }

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

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

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

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

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

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

  514.             dst += stride;

  515.         }

  516.     return ret;

  517. }

  518. 

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

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

  521. {

  522.     PutByteContext pb;

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

  524.     const uint8_t *ssrc = src;

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

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

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

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

  529.                  desc->nb_components >= 3;

  530. 

  531.     if (s->planar)

  532.         width /= s->bppcount;

  533. 

  534.     if (size <= 0)

  535.         return AVERROR_INVALIDDATA;

  536. 

  537.     if (is_yuv) {

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

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

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

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

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

  543.             return AVERROR(ENOMEM);

  544.         }

  545.         dst = s->yuv_line;

  546.         stride = 0;

  547. 

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

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

  550.         av_assert0(width <= bytes_per_row);

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

  552.     }

  553.     if (s->is_bayer) {

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

  555.     }

  556.     if (p->format == AV_PIX_FMT_GRAY12) {

  557.         av_fast_padded_malloc(&s->yuv_line, &s->yuv_line_size, width);

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

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

  560.             return AVERROR(ENOMEM);

  561.         }

  562.         dst = s->yuv_line;

  563.         stride = 0;

  564.     }

  565. 

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

  567. #if CONFIG_ZLIB

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

  569.                                 strip_start, is_yuv);

  570. #else

  571.         av_log(s->avctx, AV_LOG_ERROR,

  572.                "zlib support not enabled, "

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

  574.         return AVERROR(ENOSYS);

  575. #endif

  576.     }

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

  578. #if CONFIG_LZMA

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

  580.                                 strip_start, is_yuv);

  581. #else

  582.         av_log(s->avctx, AV_LOG_ERROR,

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

  584.         return AVERROR(ENOSYS);

  585. #endif

  586.     }

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

  588.         if (s->fill_order) {

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

  590.                 return ret;

  591.             ssrc = src = s->deinvert_buf;

  592.         }

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

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

  595.         }

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

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

  598.             return ret;

  599.         }

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

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

  602.             if (pixels < width) {

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

  604.                        pixels, width);

  605.                 return AVERROR_INVALIDDATA;

  606.             }

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

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

  609.             if (is_yuv) {

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

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

  612.             } else if (p->format == AV_PIX_FMT_GRAY12) {

  613.                 unpack_gray(s, p, dst, strip_start + line, width, s->bpp);

  614.             }

  615.             dst += stride;

  616.         }

  617.         return 0;

  618.     }

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

  620.         s->compr == TIFF_G3        ||

  621.         s->compr == TIFF_G4) {

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

  623.             return AVERROR_INVALIDDATA;

  624. 

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

  626.     }

  627. 

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

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

  630. 

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

  632.         if (src - ssrc > size) {

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

  634.             return AVERROR_INVALIDDATA;

  635.         }

  636. 

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

  638.             break;

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

  640.         switch (s->compr) {

  641.         case TIFF_RAW:

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

  643.                 return AVERROR_INVALIDDATA;

  644. 

  645.             if (!s->fill_order) {

  646.                 horizontal_fill(s, s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 || s->is_bayer),

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

  648.             } else {

  649.                 int i;

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

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

  652.             }

  653.             src += width;

  654.             break;

  655.         case TIFF_PACKBITS:

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

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

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

  659.                     return AVERROR_INVALIDDATA;

  660.                 }

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

  662.                 if (code >= 0) {

  663.                     code++;

  664.                     if (pixels + code > width ||

  665.                         ssrc + size - src < code) {

  666.                         av_log(s->avctx, AV_LOG_ERROR,

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

  668.                         return AVERROR_INVALIDDATA;

  669.                     }

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

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

  672.                     src    += code;

  673.                     pixels += code;

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

  675.                     code = (-code) + 1;

  676.                     if (pixels + code > width) {

  677.                         av_log(s->avctx, AV_LOG_ERROR,

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

  679.                         return AVERROR_INVALIDDATA;

  680.                     }

  681.                     c = *src++;

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

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

  684.                     pixels += code;

  685.                 }

  686.             }

  687.             if (s->fill_order) {

  688.                 int i;

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

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

  691.             }

  692.             break;

  693.         }

  694.         if (is_yuv) {

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

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

  697.         } else if (p->format == AV_PIX_FMT_GRAY12) {

  698.             unpack_gray(s, p, dst, strip_start + line, width, s->bpp);

  699.         }

  700.         dst += stride;

  701.     }

  702.     return 0;

  703. }

  704. 

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

  706. {

  707.     int ret;

  708.     int create_gray_palette = 0;

  709. 

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

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

  712.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  715.         return AVERROR_INVALIDDATA;

  716.     }

  717. 

  718.     switch (s->planar * 1000 + s->bpp * 10 + s->bppcount + s->is_bayer * 10000) {

  719.     case 11:

  720.         if (!s->palette_is_set) {

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

  722.             break;

  723.         }

  724.     case 21:

  725.     case 41:

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

  727.         if (!s->palette_is_set) {

  728.             create_gray_palette = 1;

  729.         }

  730.         break;

  731.     case 81:

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

  733.         break;

  734.     case 121:

  735.         s->avctx->pix_fmt = AV_PIX_FMT_GRAY12;

  736.         break;

  737.     case 10081:

  738.         switch (AV_RL32(s->pattern)) {

  739.         case 0x02010100:

  740.             s->avctx->pix_fmt = AV_PIX_FMT_BAYER_RGGB8;

  741.             break;

  742.         case 0x00010102:

  743.             s->avctx->pix_fmt = AV_PIX_FMT_BAYER_BGGR8;

  744.             break;

  745.         case 0x01000201:

  746.             s->avctx->pix_fmt = AV_PIX_FMT_BAYER_GBRG8;

  747.             break;

  748.         case 0x01020001:

  749.             s->avctx->pix_fmt = AV_PIX_FMT_BAYER_GRBG8;

  750.             break;

  751.         default:

  752.             av_log(s->avctx, AV_LOG_ERROR, "Unsupported Bayer pattern: 0x%X\n",

  753.                    AV_RL32(s->pattern));

  754.             return AVERROR_PATCHWELCOME;

  755.         }

  756.         break;

  757.     case 10121:

  758.         switch (AV_RL32(s->pattern)) {

  759.         case 0x02010100:

  760.             s->avctx->pix_fmt = s->le ? AV_PIX_FMT_BAYER_RGGB16LE : AV_PIX_FMT_BAYER_RGGB16BE;

  761.             break;

  762.         case 0x00010102:

  763.             s->avctx->pix_fmt = s->le ? AV_PIX_FMT_BAYER_BGGR16LE : AV_PIX_FMT_BAYER_BGGR16BE;

  764.             break;

  765.         case 0x01000201:

  766.             s->avctx->pix_fmt = s->le ? AV_PIX_FMT_BAYER_GBRG16LE : AV_PIX_FMT_BAYER_GBRG16BE;

  767.             break;

  768.         case 0x01020001:

  769.             s->avctx->pix_fmt = s->le ? AV_PIX_FMT_BAYER_GRBG16LE : AV_PIX_FMT_BAYER_GRBG16BE;

  770.             break;

  771.         default:

  772.             av_log(s->avctx, AV_LOG_ERROR, "Unsupported Bayer pattern: 0x%X\n",

  773.                    AV_RL32(s->pattern));

  774.             return AVERROR_PATCHWELCOME;

  775.         }

  776.         break;

  777.     case 10161:

  778.         switch (AV_RL32(s->pattern)) {

  779.         case 0x02010100:

  780.             s->avctx->pix_fmt = s->le ? AV_PIX_FMT_BAYER_RGGB16LE : AV_PIX_FMT_BAYER_RGGB16BE;

  781.             break;

  782.         case 0x00010102:

  783.             s->avctx->pix_fmt = s->le ? AV_PIX_FMT_BAYER_BGGR16LE : AV_PIX_FMT_BAYER_BGGR16BE;

  784.             break;

  785.         case 0x01000201:

  786.             s->avctx->pix_fmt = s->le ? AV_PIX_FMT_BAYER_GBRG16LE : AV_PIX_FMT_BAYER_GBRG16BE;

  787.             break;

  788.         case 0x01020001:

  789.             s->avctx->pix_fmt = s->le ? AV_PIX_FMT_BAYER_GRBG16LE : AV_PIX_FMT_BAYER_GRBG16BE;

  790.             break;

  791.         default:

  792.             av_log(s->avctx, AV_LOG_ERROR, "Unsupported Bayer pattern: 0x%X\n",

  793.                    AV_RL32(s->pattern));

  794.             return AVERROR_PATCHWELCOME;

  795.         }

  796.         break;

  797.     case 243:

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

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

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

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

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

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

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

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

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

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

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

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

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

  811.             } else {

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

  813.                 return AVERROR_PATCHWELCOME;

  814.             }

  815.         } else

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

  817.         break;

  818.     case 161:

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

  820.         break;

  821.     case 162:

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

  823.         break;

  824.     case 322:

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

  826.         break;

  827.     case 324:

  828.         s->avctx->pix_fmt = s->photometric == TIFF_PHOTOMETRIC_SEPARATED ? AV_PIX_FMT_RGB0 : AV_PIX_FMT_RGBA;

  829.         break;

  830.     case 483:

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

  832.         break;

  833.     case 644:

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

  835.         break;

  836.     case 1243:

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

  838.         break;

  839.     case 1324:

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

  841.         break;

  842.     case 1483:

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

  844.         break;

  845.     case 1644:

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

  847.         break;

  848.     default:

  849.         av_log(s->avctx, AV_LOG_ERROR,

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

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

  852.         return AVERROR_INVALIDDATA;

  853.     }

  854. 

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

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

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

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

  859.            desc->nb_components < 3) {

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

  861.             return AVERROR_INVALIDDATA;

  862.         }

  863.     }

  864. 

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

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

  867.         if (ret < 0)

  868.             return ret;

  869.     }

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

  871.         return ret;

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

  873.         if (!create_gray_palette)

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

  875.         else {

  876.             /* make default grayscale pal */

  877.             int i;

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

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

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

  881.         }

  882.     }

  883.     return 0;

  884. }

  885. 

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

  887. {

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

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

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

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

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

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

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

  895.             num = num >> 1;

  896.             den = den >> 1;

  897.         }

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

  899.                   num, den, INT32_MAX);

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

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

  902.     }

  903. }

  904. 

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

  906. {

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

  908.     int i, start;

  909.     int pos;

  910.     int ret;

  911.     double *dp;

  912. 

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

  914.     if (ret < 0) {

  915.         goto end;

  916.     }

  917. 

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

  919.     if (count == 1) {

  920.         switch (type) {

  921.         case TIFF_BYTE:

  922.         case TIFF_SHORT:

  923.         case TIFF_LONG:

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

  925.             break;

  926.         case TIFF_RATIONAL:

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

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

  929.             break;

  930.         case TIFF_STRING:

  931.             if (count <= 4) {

  932.                 break;

  933.             }

  934.         default:

  935.             value = UINT_MAX;

  936.         }

  937.     }

  938. 

  939.     switch (tag) {

  940.     case TIFF_WIDTH:

  941.         s->width = value;

  942.         break;

  943.     case TIFF_HEIGHT:

  944.         s->height = value;

  945.         break;

  946.     case TIFF_BPP:

  947.         if (count > 4U) {

  948.             av_log(s->avctx, AV_LOG_ERROR,

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

  950.                    value, count);

  951.             return AVERROR_INVALIDDATA;

  952.         }

  953.         s->bppcount = count;

  954.         if (count == 1)

  955.             s->bpp = value;

  956.         else {

  957.             switch (type) {

  958.             case TIFF_BYTE:

  959.             case TIFF_SHORT:

  960.             case TIFF_LONG:

  961.                 s->bpp = 0;

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

  963.                     return AVERROR_INVALIDDATA;

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

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

  966.                 break;

  967.             default:

  968.                 s->bpp = -1;

  969.             }

  970.         }

  971.         break;

  972.     case TIFF_SAMPLES_PER_PIXEL:

  973.         if (count != 1) {

  974.             av_log(s->avctx, AV_LOG_ERROR,

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

  976.             return AVERROR_INVALIDDATA;

  977.         }

  978.         if (value > 4U) {

  979.             av_log(s->avctx, AV_LOG_ERROR,

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

  981.             return AVERROR_INVALIDDATA;

  982.         }

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

  984.             s->bpp *= value;

  985.         s->bppcount = value;

  986.         break;

  987.     case TIFF_COMPR:

  988.         s->compr     = value;

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

  990.         s->predictor = 0;

  991.         switch (s->compr) {

  992.         case TIFF_RAW:

  993.         case TIFF_PACKBITS:

  994.         case TIFF_LZW:

  995.         case TIFF_CCITT_RLE:

  996.             break;

  997.         case TIFF_G3:

  998.         case TIFF_G4:

  999.             s->fax_opts = 0;

  1000.             break;

  1001.         case TIFF_DEFLATE:

  1002.         case TIFF_ADOBE_DEFLATE:

  1003. #if CONFIG_ZLIB

  1004.             break;

  1005. #else

  1006.             av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");

  1007.             return AVERROR(ENOSYS);

  1008. #endif

  1009.         case TIFF_JPEG:

  1010.         case TIFF_NEWJPEG:

  1011.             avpriv_report_missing_feature(s->avctx, "JPEG compression");

  1012.             return AVERROR_PATCHWELCOME;

  1013.         case TIFF_LZMA:

  1014. #if CONFIG_LZMA

  1015.             break;

  1016. #else

  1017.             av_log(s->avctx, AV_LOG_ERROR, "LZMA not compiled in\n");

  1018.             return AVERROR(ENOSYS);

  1019. #endif

  1020.         default:

  1021.             av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n",

  1022.                    s->compr);

  1023.             return AVERROR_INVALIDDATA;

  1024.         }

  1025.         break;

  1026.     case TIFF_ROWSPERSTRIP:

  1027.         if (!value || (type == TIFF_LONG && value == UINT_MAX))

  1028.             value = s->height;

  1029.         s->rps = FFMIN(value, s->height);

  1030.         break;

  1031.     case TIFF_STRIP_OFFS:

  1032.         if (count == 1) {

  1033.             if (value > INT_MAX) {

  1034.                 av_log(s->avctx, AV_LOG_ERROR,

  1035.                     "strippos %u too large\n", value);

  1036.                 return AVERROR_INVALIDDATA;

  1037.             }

  1038.             s->strippos = 0;

  1039.             s->stripoff = value;

  1040.         } else

  1041.             s->strippos = off;

  1042.         s->strips = count;

  1043.         if (s->strips == 1)

  1044.             s->rps = s->height;

  1045.         s->sot = type;

  1046.         break;

  1047.     case TIFF_STRIP_SIZE:

  1048.         if (count == 1) {

  1049.             if (value > INT_MAX) {

  1050.                 av_log(s->avctx, AV_LOG_ERROR,

  1051.                     "stripsize %u too large\n", value);

  1052.                 return AVERROR_INVALIDDATA;

  1053.             }

  1054.             s->stripsizesoff = 0;

  1055.             s->stripsize     = value;

  1056.             s->strips        = 1;

  1057.         } else {

  1058.             s->stripsizesoff = off;

  1059.         }

  1060.         s->strips = count;

  1061.         s->sstype = type;

  1062.         break;

  1063.     case TIFF_XRES:

  1064.     case TIFF_YRES:

  1065.         set_sar(s, tag, value, value2);

  1066.         break;

  1067.     case TIFF_TILE_BYTE_COUNTS:

  1068.     case TIFF_TILE_LENGTH:

  1069.     case TIFF_TILE_OFFSETS:

  1070.     case TIFF_TILE_WIDTH:

  1071.         av_log(s->avctx, AV_LOG_ERROR, "Tiled images are not supported\n");

  1072.         return AVERROR_PATCHWELCOME;

  1073.         break;

  1074.     case TIFF_PREDICTOR:

  1075.         s->predictor = value;

  1076.         break;

  1077.     case TIFF_SUB_IFDS:

  1078.         s->sub_ifd = value;

  1079.         break;

  1080.     case TIFF_WHITE_LEVEL:

  1081.         s->white_level = value;

  1082.         break;

  1083.     case TIFF_CFA_PATTERN_DIM:

  1084.         if (count != 2 || (ff_tget(&s->gb, type, s->le) != 2 &&

  1085.                            ff_tget(&s->gb, type, s->le) != 2)) {

  1086.             av_log(s->avctx, AV_LOG_ERROR, "CFA Pattern dimensions are not 2x2\n");

  1087.             return AVERROR_INVALIDDATA;

  1088.         }

  1089.         break;

  1090.     case TIFF_CFA_PATTERN:

  1091.         s->is_bayer = 1;

  1092.         s->pattern[0] = ff_tget(&s->gb, type, s->le);

  1093.         s->pattern[1] = ff_tget(&s->gb, type, s->le);

  1094.         s->pattern[2] = ff_tget(&s->gb, type, s->le);

  1095.         s->pattern[3] = ff_tget(&s->gb, type, s->le);

  1096.         break;

  1097.     case TIFF_PHOTOMETRIC:

  1098.         switch (value) {

  1099.         case TIFF_PHOTOMETRIC_WHITE_IS_ZERO:

  1100.         case TIFF_PHOTOMETRIC_BLACK_IS_ZERO:

  1101.         case TIFF_PHOTOMETRIC_RGB:

  1102.         case TIFF_PHOTOMETRIC_PALETTE:

  1103.         case TIFF_PHOTOMETRIC_SEPARATED:

  1104.         case TIFF_PHOTOMETRIC_YCBCR:

  1105.         case TIFF_PHOTOMETRIC_CFA:

  1106.             s->photometric = value;

  1107.             break;

  1108.         case TIFF_PHOTOMETRIC_ALPHA_MASK:

  1109.         case TIFF_PHOTOMETRIC_CIE_LAB:

  1110.         case TIFF_PHOTOMETRIC_ICC_LAB:

  1111.         case TIFF_PHOTOMETRIC_ITU_LAB:

  1112.         case TIFF_PHOTOMETRIC_LOG_L:

  1113.         case TIFF_PHOTOMETRIC_LOG_LUV:

  1114.         case TIFF_PHOTOMETRIC_LINEAR_RAW:

  1115.             avpriv_report_missing_feature(s->avctx,

  1116.                                           "PhotometricInterpretation 0x%04X",

  1117.                                           value);

  1118.             return AVERROR_PATCHWELCOME;

  1119.         default:

  1120.             av_log(s->avctx, AV_LOG_ERROR, "PhotometricInterpretation %u is "

  1121.                    "unknown\n", value);

  1122.             return AVERROR_INVALIDDATA;

  1123.         }

  1124.         break;

  1125.     case TIFF_FILL_ORDER:

  1126.         if (value < 1 || value > 2) {

  1127.             av_log(s->avctx, AV_LOG_ERROR,

  1128.                    "Unknown FillOrder value %d, trying default one\n", value);

  1129.             value = 1;

  1130.         }

  1131.         s->fill_order = value - 1;

  1132.         break;

  1133.     case TIFF_PAL: {

  1134.         GetByteContext pal_gb[3];

  1135.         off = type_sizes[type];

  1136.         if (count / 3 > 256 ||

  1137.             bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)

  1138.             return AVERROR_INVALIDDATA;

  1139. 

  1140.         pal_gb[0] = pal_gb[1] = pal_gb[2] = s->gb;

  1141.         bytestream2_skip(&pal_gb[1], count / 3 * off);

  1142.         bytestream2_skip(&pal_gb[2], count / 3 * off * 2);

  1143. 

  1144.         off = (type_sizes[type] - 1) << 3;

  1145.         if (off > 31U) {

  1146.             av_log(s->avctx, AV_LOG_ERROR, "palette shift %d is out of range\n", off);

  1147.             return AVERROR_INVALIDDATA;

  1148.         }

  1149. 

  1150.         for (i = 0; i < count / 3; i++) {

  1151.             uint32_t p = 0xFF000000;

  1152.             p |= (ff_tget(&pal_gb[0], type, s->le) >> off) << 16;

  1153.             p |= (ff_tget(&pal_gb[1], type, s->le) >> off) << 8;

  1154.             p |=  ff_tget(&pal_gb[2], type, s->le) >> off;

  1155.             s->palette[i] = p;

  1156.         }

  1157.         s->palette_is_set = 1;

  1158.         break;

  1159.     }

  1160.     case TIFF_PLANAR:

  1161.         s->planar = value == 2;

  1162.         break;

  1163.     case TIFF_YCBCR_SUBSAMPLING:

  1164.         if (count != 2) {

  1165.             av_log(s->avctx, AV_LOG_ERROR, "subsample count invalid\n");

  1166.             return AVERROR_INVALIDDATA;

  1167.         }

  1168.         for (i = 0; i < count; i++) {

  1169.             s->subsampling[i] = ff_tget(&s->gb, type, s->le);

  1170.             if (s->subsampling[i] <= 0) {

  1171.                 av_log(s->avctx, AV_LOG_ERROR, "subsampling %d is invalid\n", s->subsampling[i]);

  1172.                 s->subsampling[i] = 1;

  1173.                 return AVERROR_INVALIDDATA;

  1174.             }

  1175.         }

  1176.         break;

  1177.     case TIFF_T4OPTIONS:

  1178.         if (s->compr == TIFF_G3)

  1179.             s->fax_opts = value;

  1180.         break;

  1181.     case TIFF_T6OPTIONS:

  1182.         if (s->compr == TIFF_G4)

  1183.             s->fax_opts = value;

  1184.         break;

  1185. #define ADD_METADATA(count, name, sep)\

  1186.     if ((ret = add_metadata(count, type, name, sep, s, frame)) < 0) {\

  1187.         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\

  1188.         goto end;\

  1189.     }

  1190.     case TIFF_MODEL_PIXEL_SCALE:

  1191.         ADD_METADATA(count, "ModelPixelScaleTag", NULL);

  1192.         break;

  1193.     case TIFF_MODEL_TRANSFORMATION:

  1194.         ADD_METADATA(count, "ModelTransformationTag", NULL);

  1195.         break;

  1196.     case TIFF_MODEL_TIEPOINT:

  1197.         ADD_METADATA(count, "ModelTiepointTag", NULL);

  1198.         break;

  1199.     case TIFF_GEO_KEY_DIRECTORY:

  1200.         if (s->geotag_count) {

  1201.             avpriv_request_sample(s->avctx, "Multiple geo key directories\n");

  1202.             return AVERROR_INVALIDDATA;

  1203.         }

  1204.         ADD_METADATA(1, "GeoTIFF_Version", NULL);

  1205.         ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");

  1206.         s->geotag_count   = ff_tget_short(&s->gb, s->le);

  1207.         if (s->geotag_count > count / 4 - 1) {

  1208.             s->geotag_count = count / 4 - 1;

  1209.             av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n");

  1210.         }

  1211.         if (   bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4

  1212.             || s->geotag_count == 0) {

  1213.             s->geotag_count = 0;

  1214.             return -1;

  1215.         }

  1216.         s->geotags = av_mallocz_array(s->geotag_count, sizeof(TiffGeoTag));

  1217.         if (!s->geotags) {

  1218.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1219.             s->geotag_count = 0;

  1220.             goto end;

  1221.         }

  1222.         for (i = 0; i < s->geotag_count; i++) {

  1223.             s->geotags[i].key    = ff_tget_short(&s->gb, s->le);

  1224.             s->geotags[i].type   = ff_tget_short(&s->gb, s->le);

  1225.             s->geotags[i].count  = ff_tget_short(&s->gb, s->le);

  1226. 

  1227.             if (!s->geotags[i].type)

  1228.                 s->geotags[i].val  = get_geokey_val(s->geotags[i].key, ff_tget_short(&s->gb, s->le));

  1229.             else

  1230.                 s->geotags[i].offset = ff_tget_short(&s->gb, s->le);

  1231.         }

  1232.         break;

  1233.     case TIFF_GEO_DOUBLE_PARAMS:

  1234.         if (count >= INT_MAX / sizeof(int64_t))

  1235.             return AVERROR_INVALIDDATA;

  1236.         if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))

  1237.             return AVERROR_INVALIDDATA;

  1238.         dp = av_malloc_array(count, sizeof(double));

  1239.         if (!dp) {

  1240.             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1241.             goto end;

  1242.         }

  1243.         for (i = 0; i < count; i++)

  1244.             dp[i] = ff_tget_double(&s->gb, s->le);

  1245.         for (i = 0; i < s->geotag_count; i++) {

  1246.             if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) {

  1247.                 if (s->geotags[i].count == 0

  1248.                     || s->geotags[i].offset + s->geotags[i].count > count) {

  1249.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  1250.                 } else if (s->geotags[i].val) {

  1251.                     av_log(s->avctx, AV_LOG_WARNING, "Duplicate GeoTIFF key %d\n", s->geotags[i].key);

  1252.                 } else {

  1253.                     char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");

  1254.                     if (!ap) {

  1255.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1256.                         av_freep(&dp);

  1257.                         return AVERROR(ENOMEM);

  1258.                     }

  1259.                     s->geotags[i].val = ap;

  1260.                 }

  1261.             }

  1262.         }

  1263.         av_freep(&dp);

  1264.         break;

  1265.     case TIFF_GEO_ASCII_PARAMS:

  1266.         pos = bytestream2_tell(&s->gb);

  1267.         for (i = 0; i < s->geotag_count; i++) {

  1268.             if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) {

  1269.                 if (s->geotags[i].count == 0

  1270.                     || s->geotags[i].offset +  s->geotags[i].count > count) {

  1271.                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);

  1272.                 } else {

  1273.                     char *ap;

  1274. 

  1275.                     bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);

  1276.                     if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)

  1277.                         return AVERROR_INVALIDDATA;

  1278.                     if (s->geotags[i].val)

  1279.                         return AVERROR_INVALIDDATA;

  1280.                     ap = av_malloc(s->geotags[i].count);

  1281.                     if (!ap) {

  1282.                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");

  1283.                         return AVERROR(ENOMEM);

  1284.                     }

  1285.                     bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);

  1286.                     ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte

  1287.                     s->geotags[i].val = ap;

  1288.                 }

  1289.             }

  1290.         }

  1291.         break;

  1292.     case TIFF_ARTIST:

  1293.         ADD_METADATA(count, "artist", NULL);

  1294.         break;

  1295.     case TIFF_COPYRIGHT:

  1296.         ADD_METADATA(count, "copyright", NULL);

  1297.         break;

  1298.     case TIFF_DATE:

  1299.         ADD_METADATA(count, "date", NULL);

  1300.         break;

  1301.     case TIFF_DOCUMENT_NAME:

  1302.         ADD_METADATA(count, "document_name", NULL);

  1303.         break;

  1304.     case TIFF_HOST_COMPUTER:

  1305.         ADD_METADATA(count, "computer", NULL);

  1306.         break;

  1307.     case TIFF_IMAGE_DESCRIPTION:

  1308.         ADD_METADATA(count, "description", NULL);

  1309.         break;

  1310.     case TIFF_MAKE:

  1311.         ADD_METADATA(count, "make", NULL);

  1312.         break;

  1313.     case TIFF_MODEL:

  1314.         ADD_METADATA(count, "model", NULL);

  1315.         break;

  1316.     case TIFF_PAGE_NAME:

  1317.         ADD_METADATA(count, "page_name", NULL);

  1318.         break;

  1319.     case TIFF_PAGE_NUMBER:

  1320.         ADD_METADATA(count, "page_number", " / ");

  1321.         break;

  1322.     case TIFF_SOFTWARE_NAME:

  1323.         ADD_METADATA(count, "software", NULL);

  1324.         break;

  1325.     default:

  1326.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  1327.             av_log(s->avctx, AV_LOG_ERROR,

  1328.                    "Unknown or unsupported tag %d/0x%0X\n",

  1329.                    tag, tag);

  1330.             return AVERROR_INVALIDDATA;

  1331.         }

  1332.     }

  1333. end:

  1334.     if (s->bpp > 64U) {

  1335.         av_log(s->avctx, AV_LOG_ERROR,

  1336.                 "This format is not supported (bpp=%d, %d components)\n",

  1337.                 s->bpp, count);

  1338.         s->bpp = 0;

  1339.         return AVERROR_INVALIDDATA;

  1340.     }

  1341.     bytestream2_seek(&s->gb, start, SEEK_SET);

  1342.     return 0;

  1343. }

  1344. 

  1345. static int decode_frame(AVCodecContext *avctx,

  1346.                         void *data, int *got_frame, AVPacket *avpkt)

  1347. {

  1348.     TiffContext *const s = avctx->priv_data;

  1349.     AVFrame *const p = data;

  1350.     ThreadFrame frame = { .f = data };

  1351.     unsigned off;

  1352.     int le, ret, plane, planes;

  1353.     int i, j, entries, stride;

  1354.     unsigned soff, ssize;

  1355.     uint8_t *dst;

  1356.     GetByteContext stripsizes;

  1357.     GetByteContext stripdata;

  1358. 

  1359.     bytestream2_init(&s->gb, avpkt->data, avpkt->size);

  1360. 

  1361.     // parse image header

  1362.     if ((ret = ff_tdecode_header(&s->gb, &le, &off))) {

  1363.         av_log(avctx, AV_LOG_ERROR, "Invalid TIFF header\n");

  1364.         return ret;

  1365.     } else if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {

  1366.         av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");

  1367.         return AVERROR_INVALIDDATA;

  1368.     }

  1369.     s->le          = le;

  1370.     // TIFF_BPP is not a required tag and defaults to 1

  1371. again:

  1372.     s->bppcount    = s->bpp = 1;

  1373.     s->photometric = TIFF_PHOTOMETRIC_NONE;

  1374.     s->compr       = TIFF_RAW;

  1375.     s->fill_order  = 0;

  1376.     s->white_level = 0;

  1377.     s->is_bayer    = 0;

  1378.     free_geotags(s);

  1379. 

  1380.     // Reset these offsets so we can tell if they were set this frame

  1381.     s->stripsizesoff = s->strippos = 0;

  1382.     /* parse image file directory */

  1383.     bytestream2_seek(&s->gb, off, SEEK_SET);

  1384.     entries = ff_tget_short(&s->gb, le);

  1385.     if (bytestream2_get_bytes_left(&s->gb) < entries * 12)

  1386.         return AVERROR_INVALIDDATA;

  1387.     for (i = 0; i < entries; i++) {

  1388.         if ((ret = tiff_decode_tag(s, p)) < 0)

  1389.             return ret;

  1390.     }

  1391. 

  1392.     if (s->sub_ifd && s->get_subimage) {

  1393.         off = s->sub_ifd;

  1394.         if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {

  1395.             av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");

  1396.             return AVERROR_INVALIDDATA;

  1397.         }

  1398.         s->sub_ifd = 0;

  1399.         goto again;

  1400.     }

  1401. 

  1402.     for (i = 0; i<s->geotag_count; i++) {

  1403.         const char *keyname = get_geokey_name(s->geotags[i].key);

  1404.         if (!keyname) {

  1405.             av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);

  1406.             continue;

  1407.         }

  1408.         if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {

  1409.             av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);

  1410.             continue;

  1411.         }

  1412.         ret = av_dict_set(&p->metadata, keyname, s->geotags[i].val, 0);

  1413.         if (ret<0) {

  1414.             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);

  1415.             return ret;

  1416.         }

  1417.     }

  1418. 

  1419.     if (!s->strippos && !s->stripoff) {

  1420.         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");

  1421.         return AVERROR_INVALIDDATA;

  1422.     }

  1423.     /* now we have the data and may start decoding */

  1424.     if ((ret = init_image(s, &frame)) < 0)

  1425.         return ret;

  1426. 

  1427.     if (s->strips == 1 && !s->stripsize) {

  1428.         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");

  1429.         s->stripsize = avpkt->size - s->stripoff;

  1430.     }

  1431. 

  1432.     if (s->stripsizesoff) {

  1433.         if (s->stripsizesoff >= (unsigned)avpkt->size)

  1434.             return AVERROR_INVALIDDATA;

  1435.         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,

  1436.                          avpkt->size - s->stripsizesoff);

  1437.     }

  1438.     if (s->strippos) {

  1439.         if (s->strippos >= (unsigned)avpkt->size)

  1440.             return AVERROR_INVALIDDATA;

  1441.         bytestream2_init(&stripdata, avpkt->data + s->strippos,

  1442.                          avpkt->size - s->strippos);

  1443.     }

  1444. 

  1445.     if (s->rps <= 0 || s->rps % s->subsampling[1]) {

  1446.         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);

  1447.         return AVERROR_INVALIDDATA;

  1448.     }

  1449. 

  1450.     planes = s->planar ? s->bppcount : 1;

  1451.     for (plane = 0; plane < planes; plane++) {

  1452.         int remaining = avpkt->size;

  1453.         int decoded_height;

  1454.         stride = p->linesize[plane];

  1455.         dst = p->data[plane];

  1456.         for (i = 0; i < s->height; i += s->rps) {

  1457.             if (i)

  1458.                 dst += s->rps * stride;

  1459.             if (s->stripsizesoff)

  1460.                 ssize = ff_tget(&stripsizes, s->sstype, le);

  1461.             else

  1462.                 ssize = s->stripsize;

  1463. 

  1464.             if (s->strippos)

  1465.                 soff = ff_tget(&stripdata, s->sot, le);

  1466.             else

  1467.                 soff = s->stripoff;

  1468. 

  1469.             if (soff > avpkt->size || ssize > avpkt->size - soff || ssize > remaining) {

  1470.                 av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");

  1471.                 return AVERROR_INVALIDDATA;

  1472.             }

  1473.             remaining -= ssize;

  1474.             if ((ret = tiff_unpack_strip(s, p, dst, stride, avpkt->data + soff, ssize, i,

  1475.                                          FFMIN(s->rps, s->height - i))) < 0) {

  1476.                 if (avctx->err_recognition & AV_EF_EXPLODE)

  1477.                     return ret;

  1478.                 break;

  1479.             }

  1480.         }

  1481.         decoded_height = FFMIN(i, s->height);

  1482. 

  1483.         if (s->predictor == 2) {

  1484.             if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {

  1485.                 av_log(s->avctx, AV_LOG_ERROR, "predictor == 2 with YUV is unsupported");

  1486.                 return AVERROR_PATCHWELCOME;

  1487.             }

  1488.             dst   = p->data[plane];

  1489.             soff  = s->bpp >> 3;

  1490.             if (s->planar)

  1491.                 soff  = FFMAX(soff / s->bppcount, 1);

  1492.             ssize = s->width * soff;

  1493.             if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||

  1494.                 s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||

  1495.                 s->avctx->pix_fmt == AV_PIX_FMT_GRAY16LE ||

  1496.                 s->avctx->pix_fmt == AV_PIX_FMT_YA16LE ||

  1497.                 s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||

  1498.                 s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {

  1499.                 for (i = 0; i < decoded_height; i++) {

  1500.                     for (j = soff; j < ssize; j += 2)

  1501.                         AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));

  1502.                     dst += stride;

  1503.                 }

  1504.             } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||

  1505.                        s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||

  1506.                        s->avctx->pix_fmt == AV_PIX_FMT_GRAY16BE ||

  1507.                        s->avctx->pix_fmt == AV_PIX_FMT_YA16BE ||

  1508.                        s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||

  1509.                        s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {

  1510.                 for (i = 0; i < decoded_height; i++) {

  1511.                     for (j = soff; j < ssize; j += 2)

  1512.                         AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));

  1513.                     dst += stride;

  1514.                 }

  1515.             } else {

  1516.                 for (i = 0; i < decoded_height; i++) {

  1517.                     for (j = soff; j < ssize; j++)

  1518.                         dst[j] += dst[j - soff];

  1519.                     dst += stride;

  1520.                 }

  1521.             }

  1522.         }

  1523. 

  1524.         if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {

  1525.             int c = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255);

  1526.             dst = p->data[plane];

  1527.             for (i = 0; i < s->height; i++) {

  1528.                 for (j = 0; j < stride; j++)

  1529.                     dst[j] = c - dst[j];

  1530.                 dst += stride;

  1531.             }

  1532.         }

  1533. 

  1534.         if (s->photometric == TIFF_PHOTOMETRIC_SEPARATED &&

  1535.             s->avctx->pix_fmt == AV_PIX_FMT_RGB0) {

  1536.             dst = p->data[plane];

  1537.             for (i = 0; i < s->height; i++) {

  1538.                 for (j = 0; j < s->width; j++) {

  1539.                     int k =  255 - dst[4 * j + 3];

  1540.                     int r = (255 - dst[4 * j    ]) * k;

  1541.                     int g = (255 - dst[4 * j + 1]) * k;

  1542.                     int b = (255 - dst[4 * j + 2]) * k;

  1543.                     dst[4 * j    ] = r * 257 >> 16;

  1544.                     dst[4 * j + 1] = g * 257 >> 16;

  1545.                     dst[4 * j + 2] = b * 257 >> 16;

  1546.                     dst[4 * j + 3] = 255;

  1547.                 }

  1548.                 dst += p->linesize[plane];

  1549.             }

  1550.         }

  1551.     }

  1552. 

  1553.     if (s->planar && s->bppcount > 2) {

  1554.         FFSWAP(uint8_t*, p->data[0],     p->data[2]);

  1555.         FFSWAP(int,      p->linesize[0], p->linesize[2]);

  1556.         FFSWAP(uint8_t*, p->data[0],     p->data[1]);

  1557.         FFSWAP(int,      p->linesize[0], p->linesize[1]);

  1558.     }

  1559. 

  1560.     if (s->is_bayer && s->white_level && s->bpp == 16) {

  1561.         uint16_t *dst = (uint16_t *)p->data[0];

  1562.         for (i = 0; i < s->height; i++) {

  1563.             for (j = 0; j < s->width; j++)

  1564.                 dst[j] = FFMIN((dst[j] / (float)s->white_level) * 65535, 65535);

  1565.             dst += stride / 2;

  1566.         }

  1567.     }

  1568. 

  1569.     *got_frame = 1;

  1570. 

  1571.     return avpkt->size;

  1572. }

  1573. 

  1574. static av_cold int tiff_init(AVCodecContext *avctx)

  1575. {

  1576.     TiffContext *s = avctx->priv_data;

  1577. 

  1578.     s->width  = 0;

  1579.     s->height = 0;

  1580.     s->subsampling[0] =

  1581.     s->subsampling[1] = 1;

  1582.     s->avctx  = avctx;

  1583.     ff_lzw_decode_open(&s->lzw);

  1584.     if (!s->lzw)

  1585.         return AVERROR(ENOMEM);

  1586.     ff_ccitt_unpack_init();

  1587. 

  1588.     return 0;

  1589. }

  1590. 

  1591. static av_cold int tiff_end(AVCodecContext *avctx)

  1592. {

  1593.     TiffContext *const s = avctx->priv_data;

  1594. 

  1595.     free_geotags(s);

  1596. 

  1597.     ff_lzw_decode_close(&s->lzw);

  1598.     av_freep(&s->deinvert_buf);

  1599.     s->deinvert_buf_size = 0;

  1600.     av_freep(&s->yuv_line);

  1601.     s->yuv_line_size = 0;

  1602.     av_freep(&s->fax_buffer);

  1603.     s->fax_buffer_size = 0;

  1604.     return 0;

  1605. }

  1606. 

  1607. #define OFFSET(x) offsetof(TiffContext, x)

  1608. static const AVOption tiff_options[] = {

  1609.     { "subimage", "decode subimage instead if available", OFFSET(get_subimage), AV_OPT_TYPE_BOOL, {.i64=0},  0, 1, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM },

  1610.     { NULL },

  1611. };

  1612. 

  1613. static const AVClass tiff_decoder_class = {

  1614.     .class_name = "TIFF decoder",

  1615.     .item_name  = av_default_item_name,

  1616.     .option     = tiff_options,

  1617.     .version    = LIBAVUTIL_VERSION_INT,

  1618. };

  1619. 

  1620. AVCodec ff_tiff_decoder = {

  1621.     .name           = "tiff",

  1622.     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),

  1623.     .type           = AVMEDIA_TYPE_VIDEO,

  1624.     .id             = AV_CODEC_ID_TIFF,

  1625.     .priv_data_size = sizeof(TiffContext),

  1626.     .init           = tiff_init,

  1627.     .close          = tiff_end,

  1628.     .decode         = decode_frame,

  1629.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(tiff_init),

  1630.     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,

  1631.     .priv_class     = &tiff_decoder_class,

  1632. };