yading@10: /*
yading@10:  * Copyright (c) 2006 Konstantin Shishkov
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * TIFF image decoder
yading@10:  * @author Konstantin Shishkov
yading@10:  */
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "bytestream.h"
yading@10: #include "config.h"
yading@10: #if CONFIG_ZLIB
yading@10: #include <zlib.h>
yading@10: #endif
yading@10: #include "lzw.h"
yading@10: #include "tiff.h"
yading@10: #include "tiff_data.h"
yading@10: #include "faxcompr.h"
yading@10: #include "internal.h"
yading@10: #include "mathops.h"
yading@10: #include "libavutil/attributes.h"
yading@10: #include "libavutil/intreadwrite.h"
yading@10: #include "libavutil/imgutils.h"
yading@10: #include "libavutil/avstring.h"
yading@10: 
yading@10: typedef struct TiffContext {
yading@10:     AVCodecContext *avctx;
yading@10:     GetByteContext gb;
yading@10: 
yading@10:     int width, height;
yading@10:     unsigned int bpp, bppcount;
yading@10:     uint32_t palette[256];
yading@10:     int palette_is_set;
yading@10:     int le;
yading@10:     enum TiffCompr compr;
yading@10:     int invert;
yading@10:     int fax_opts;
yading@10:     int predictor;
yading@10:     int fill_order;
yading@10: 
yading@10:     int strips, rps, sstype;
yading@10:     int sot;
yading@10:     int stripsizesoff, stripsize, stripoff, strippos;
yading@10:     LZWState *lzw;
yading@10: 
yading@10:     uint8_t *deinvert_buf;
yading@10:     int deinvert_buf_size;
yading@10: 
yading@10:     int geotag_count;
yading@10:     TiffGeoTag *geotags;
yading@10: } TiffContext;
yading@10: 
yading@10: static unsigned tget_short(GetByteContext *gb, int le)
yading@10: {
yading@10:     unsigned v = le ? bytestream2_get_le16(gb) : bytestream2_get_be16(gb);
yading@10:     return v;
yading@10: }
yading@10: 
yading@10: static unsigned tget_long(GetByteContext *gb, int le)
yading@10: {
yading@10:     unsigned v = le ? bytestream2_get_le32(gb) : bytestream2_get_be32(gb);
yading@10:     return v;
yading@10: }
yading@10: 
yading@10: static double tget_double(GetByteContext *gb, int le)
yading@10: {
yading@10:     av_alias64 i = { .u64 = le ? bytestream2_get_le64(gb) : bytestream2_get_be64(gb)};
yading@10:     return i.f64;
yading@10: }
yading@10: 
yading@10: static unsigned tget(GetByteContext *gb, int type, int le)
yading@10: {
yading@10:     switch (type) {
yading@10:     case TIFF_BYTE : return bytestream2_get_byte(gb);
yading@10:     case TIFF_SHORT: return tget_short(gb, le);
yading@10:     case TIFF_LONG : return tget_long(gb, le);
yading@10:     default        : return UINT_MAX;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void free_geotags(TiffContext *const s)
yading@10: {
yading@10:     int i;
yading@10:     for (i = 0; i < s->geotag_count; i++) {
yading@10:         if (s->geotags[i].val)
yading@10:             av_freep(&s->geotags[i].val);
yading@10:     }
yading@10:     av_freep(&s->geotags);
yading@10: }
yading@10: 
yading@10: #define RET_GEOKEY(TYPE, array, element)\
yading@10:     if (key >= TIFF_##TYPE##_KEY_ID_OFFSET &&\
yading@10:         key - TIFF_##TYPE##_KEY_ID_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_name_type_map))\
yading@10:         return ff_tiff_##array##_name_type_map[key - TIFF_##TYPE##_KEY_ID_OFFSET].element;
yading@10: 
yading@10: static const char *get_geokey_name(int key)
yading@10: {
yading@10:     RET_GEOKEY(VERT, vert, name);
yading@10:     RET_GEOKEY(PROJ, proj, name);
yading@10:     RET_GEOKEY(GEOG, geog, name);
yading@10:     RET_GEOKEY(CONF, conf, name);
yading@10: 
yading@10:     return NULL;
yading@10: }
yading@10: 
yading@10: static int get_geokey_type(int key)
yading@10: {
yading@10:     RET_GEOKEY(VERT, vert, type);
yading@10:     RET_GEOKEY(PROJ, proj, type);
yading@10:     RET_GEOKEY(GEOG, geog, type);
yading@10:     RET_GEOKEY(CONF, conf, type);
yading@10: 
yading@10:     return AVERROR_INVALIDDATA;
yading@10: }
yading@10: 
yading@10: static int cmp_id_key(const void *id, const void *k)
yading@10: {
yading@10:     return *(const int*)id - ((const TiffGeoTagKeyName*)k)->key;
yading@10: }
yading@10: 
yading@10: static const char *search_keyval(const TiffGeoTagKeyName *keys, int n, int id)
yading@10: {
yading@10:     TiffGeoTagKeyName *r = bsearch(&id, keys, n, sizeof(keys[0]), cmp_id_key);
yading@10:     if(r)
yading@10:         return r->name;
yading@10: 
yading@10:     return NULL;
yading@10: }
yading@10: 
yading@10: static char *get_geokey_val(int key, int val)
yading@10: {
yading@10:     char *ap;
yading@10: 
yading@10:     if (val == TIFF_GEO_KEY_UNDEFINED)
yading@10:         return av_strdup("undefined");
yading@10:     if (val == TIFF_GEO_KEY_USER_DEFINED)
yading@10:         return av_strdup("User-Defined");
yading@10: 
yading@10: #define RET_GEOKEY_VAL(TYPE, array)\
yading@10:     if (val >= TIFF_##TYPE##_OFFSET &&\
yading@10:         val - TIFF_##TYPE##_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_codes))\
yading@10:         return av_strdup(ff_tiff_##array##_codes[val - TIFF_##TYPE##_OFFSET]);
yading@10: 
yading@10:     switch (key) {
yading@10:     case TIFF_GT_MODEL_TYPE_GEOKEY:
yading@10:         RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);
yading@10:         break;
yading@10:     case TIFF_GT_RASTER_TYPE_GEOKEY:
yading@10:         RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);
yading@10:         break;
yading@10:     case TIFF_GEOG_LINEAR_UNITS_GEOKEY:
yading@10:     case TIFF_PROJ_LINEAR_UNITS_GEOKEY:
yading@10:     case TIFF_VERTICAL_UNITS_GEOKEY:
yading@10:         RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);
yading@10:         break;
yading@10:     case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:
yading@10:     case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:
yading@10:         RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);
yading@10:         break;
yading@10:     case TIFF_GEOGRAPHIC_TYPE_GEOKEY:
yading@10:         RET_GEOKEY_VAL(GCS_TYPE, gcs_type);
yading@10:         RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);
yading@10:         break;
yading@10:     case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:
yading@10:         RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);
yading@10:         RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);
yading@10:         break;
yading@10:     case TIFF_GEOG_ELLIPSOID_GEOKEY:
yading@10:         RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);
yading@10:         break;
yading@10:     case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:
yading@10:         RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);
yading@10:         break;
yading@10:     case TIFF_PROJECTED_CS_TYPE_GEOKEY:
yading@10:         ap = av_strdup(search_keyval(ff_tiff_proj_cs_type_codes, FF_ARRAY_ELEMS(ff_tiff_proj_cs_type_codes), val));
yading@10:         if(ap) return ap;
yading@10:         break;
yading@10:     case TIFF_PROJECTION_GEOKEY:
yading@10:         ap = av_strdup(search_keyval(ff_tiff_projection_codes, FF_ARRAY_ELEMS(ff_tiff_projection_codes), val));
yading@10:         if(ap) return ap;
yading@10:         break;
yading@10:     case TIFF_PROJ_COORD_TRANS_GEOKEY:
yading@10:         RET_GEOKEY_VAL(COORD_TRANS, coord_trans);
yading@10:         break;
yading@10:     case TIFF_VERTICAL_CS_TYPE_GEOKEY:
yading@10:         RET_GEOKEY_VAL(VERT_CS, vert_cs);
yading@10:         RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);
yading@10:         break;
yading@10: 
yading@10:     }
yading@10: 
yading@10:     ap = av_malloc(14);
yading@10:     if (ap)
yading@10:         snprintf(ap, 14, "Unknown-%d", val);
yading@10:     return ap;
yading@10: }
yading@10: 
yading@10: static char *doubles2str(double *dp, int count, const char *sep)
yading@10: {
yading@10:     int i;
yading@10:     char *ap, *ap0;
yading@10:     uint64_t component_len;
yading@10:     if (!sep) sep = ", ";
yading@10:     component_len = 15LL + strlen(sep);
yading@10:     if (count >= (INT_MAX - 1)/component_len)
yading@10:         return NULL;
yading@10:     ap = av_malloc(component_len * count + 1);
yading@10:     if (!ap)
yading@10:         return NULL;
yading@10:     ap0   = ap;
yading@10:     ap[0] = '\0';
yading@10:     for (i = 0; i < count; i++) {
yading@10:         unsigned l = snprintf(ap, component_len, "%f%s", dp[i], sep);
yading@10:         if(l >= component_len) {
yading@10:             av_free(ap0);
yading@10:             return NULL;
yading@10:         }
yading@10:         ap += l;
yading@10:     }
yading@10:     ap0[strlen(ap0) - strlen(sep)] = '\0';
yading@10:     return ap0;
yading@10: }
yading@10: 
yading@10: static char *shorts2str(int16_t *sp, int count, const char *sep)
yading@10: {
yading@10:     int i;
yading@10:     char *ap, *ap0;
yading@10:     uint64_t component_len;
yading@10:     if (!sep) sep = ", ";
yading@10:     component_len = 7LL + strlen(sep);
yading@10:     if (count >= (INT_MAX - 1)/component_len)
yading@10:         return NULL;
yading@10:     ap = av_malloc(component_len * count + 1);
yading@10:     if (!ap)
yading@10:         return NULL;
yading@10:     ap0   = ap;
yading@10:     ap[0] = '\0';
yading@10:     for (i = 0; i < count; i++) {
yading@10:         unsigned l = snprintf(ap, component_len, "%d%s", sp[i], sep);
yading@10:         if (l >= component_len) {
yading@10:             av_free(ap0);
yading@10:             return NULL;
yading@10:         }
yading@10:         ap += l;
yading@10:     }
yading@10:     ap0[strlen(ap0) - strlen(sep)] = '\0';
yading@10:     return ap0;
yading@10: }
yading@10: 
yading@10: static int add_doubles_metadata(int count,
yading@10:                                 const char *name, const char *sep,
yading@10:                                 TiffContext *s, AVFrame *frame)
yading@10: {
yading@10:     char *ap;
yading@10:     int i;
yading@10:     double *dp;
yading@10: 
yading@10:     if (count >= INT_MAX / sizeof(int64_t) || count <= 0)
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))
yading@10:         return AVERROR_INVALIDDATA;
yading@10: 
yading@10:     dp = av_malloc(count * sizeof(double));
yading@10:     if (!dp)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     for (i = 0; i < count; i++)
yading@10:         dp[i] = tget_double(&s->gb, s->le);
yading@10:     ap = doubles2str(dp, count, sep);
yading@10:     av_freep(&dp);
yading@10:     if (!ap)
yading@10:         return AVERROR(ENOMEM);
yading@10:     av_dict_set(avpriv_frame_get_metadatap(frame), name, ap, AV_DICT_DONT_STRDUP_VAL);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int add_shorts_metadata(int count, const char *name,
yading@10:                                const char *sep, TiffContext *s, AVFrame *frame)
yading@10: {
yading@10:     char *ap;
yading@10:     int i;
yading@10:     int16_t *sp;
yading@10: 
yading@10:     if (count >= INT_MAX / sizeof(int16_t) || count <= 0)
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int16_t))
yading@10:         return AVERROR_INVALIDDATA;
yading@10: 
yading@10:     sp = av_malloc(count * sizeof(int16_t));
yading@10:     if (!sp)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     for (i = 0; i < count; i++)
yading@10:         sp[i] = tget_short(&s->gb, s->le);
yading@10:     ap = shorts2str(sp, count, sep);
yading@10:     av_freep(&sp);
yading@10:     if (!ap)
yading@10:         return AVERROR(ENOMEM);
yading@10:     av_dict_set(avpriv_frame_get_metadatap(frame), name, ap, AV_DICT_DONT_STRDUP_VAL);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int add_string_metadata(int count, const char *name,
yading@10:                                TiffContext *s, AVFrame *frame)
yading@10: {
yading@10:     char *value;
yading@10: 
yading@10:     if (bytestream2_get_bytes_left(&s->gb) < count || count < 0)
yading@10:         return AVERROR_INVALIDDATA;
yading@10: 
yading@10:     value = av_malloc(count + 1);
yading@10:     if (!value)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     bytestream2_get_bufferu(&s->gb, value, count);
yading@10:     value[count] = 0;
yading@10: 
yading@10:     av_dict_set(avpriv_frame_get_metadatap(frame), name, value, AV_DICT_DONT_STRDUP_VAL);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int add_metadata(int count, int type,
yading@10:                         const char *name, const char *sep, TiffContext *s, AVFrame *frame)
yading@10: {
yading@10:     switch(type) {
yading@10:     case TIFF_DOUBLE: return add_doubles_metadata(count, name, sep, s, frame);
yading@10:     case TIFF_SHORT : return add_shorts_metadata(count, name, sep, s, frame);
yading@10:     case TIFF_STRING: return add_string_metadata(count, name, s, frame);
yading@10:     default         : return AVERROR_INVALIDDATA;
yading@10:     };
yading@10: }
yading@10: 
yading@10: #if CONFIG_ZLIB
yading@10: static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src,
yading@10:                            int size)
yading@10: {
yading@10:     z_stream zstream = { 0 };
yading@10:     int zret;
yading@10: 
yading@10:     zstream.next_in = (uint8_t *)src;
yading@10:     zstream.avail_in = size;
yading@10:     zstream.next_out = dst;
yading@10:     zstream.avail_out = *len;
yading@10:     zret = inflateInit(&zstream);
yading@10:     if (zret != Z_OK) {
yading@10:         av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
yading@10:         return zret;
yading@10:     }
yading@10:     zret = inflate(&zstream, Z_SYNC_FLUSH);
yading@10:     inflateEnd(&zstream);
yading@10:     *len = zstream.total_out;
yading@10:     return zret == Z_STREAM_END ? Z_OK : zret;
yading@10: }
yading@10: #endif
yading@10: 
yading@10: static void av_always_inline horizontal_fill(unsigned int bpp, uint8_t* dst,
yading@10:                                              int usePtr, const uint8_t *src,
yading@10:                                              uint8_t c, int width, int offset)
yading@10: {
yading@10:     switch (bpp) {
yading@10:     case 1:
yading@10:         while (--width >= 0) {
yading@10:             dst[(width+offset)*8+7] = (usePtr ? src[width] : c)      & 0x1;
yading@10:             dst[(width+offset)*8+6] = (usePtr ? src[width] : c) >> 1 & 0x1;
yading@10:             dst[(width+offset)*8+5] = (usePtr ? src[width] : c) >> 2 & 0x1;
yading@10:             dst[(width+offset)*8+4] = (usePtr ? src[width] : c) >> 3 & 0x1;
yading@10:             dst[(width+offset)*8+3] = (usePtr ? src[width] : c) >> 4 & 0x1;
yading@10:             dst[(width+offset)*8+2] = (usePtr ? src[width] : c) >> 5 & 0x1;
yading@10:             dst[(width+offset)*8+1] = (usePtr ? src[width] : c) >> 6 & 0x1;
yading@10:             dst[(width+offset)*8+0] = (usePtr ? src[width] : c) >> 7;
yading@10:         }
yading@10:         break;
yading@10:     case 2:
yading@10:         while (--width >= 0) {
yading@10:             dst[(width+offset)*4+3] = (usePtr ? src[width] : c) & 0x3;
yading@10:             dst[(width+offset)*4+2] = (usePtr ? src[width] : c) >> 2 & 0x3;
yading@10:             dst[(width+offset)*4+1] = (usePtr ? src[width] : c) >> 4 & 0x3;
yading@10:             dst[(width+offset)*4+0] = (usePtr ? src[width] : c) >> 6;
yading@10:         }
yading@10:         break;
yading@10:     case 4:
yading@10:         while (--width >= 0) {
yading@10:             dst[(width+offset)*2+1] = (usePtr ? src[width] : c) & 0xF;
yading@10:             dst[(width+offset)*2+0] = (usePtr ? src[width] : c) >> 4;
yading@10:         }
yading@10:         break;
yading@10:     default:
yading@10:         if (usePtr) {
yading@10:             memcpy(dst + offset, src, width);
yading@10:         } else {
yading@10:             memset(dst + offset, c, width);
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
yading@10:                              const uint8_t *src, int size, int lines)
yading@10: {
yading@10:     int c, line, pixels, code, ret;
yading@10:     const uint8_t *ssrc = src;
yading@10:     int width = ((s->width * s->bpp) + 7) >> 3;
yading@10: 
yading@10:     if (size <= 0)
yading@10:         return AVERROR_INVALIDDATA;
yading@10: 
yading@10: #if CONFIG_ZLIB
yading@10:     if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
yading@10:         uint8_t *src2 = NULL, *zbuf;
yading@10:         unsigned long outlen;
yading@10:         int i, ret;
yading@10:         outlen = width * lines;
yading@10:         zbuf = av_malloc(outlen);
yading@10:         if (!zbuf)
yading@10:             return AVERROR(ENOMEM);
yading@10:         if (s->fill_order) {
yading@10:             src2 = av_malloc((unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE);
yading@10:             if (!src2) {
yading@10:                 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
yading@10:                 av_free(zbuf);
yading@10:                 return AVERROR(ENOMEM);
yading@10:             }
yading@10:             for (i = 0; i < size; i++)
yading@10:                 src2[i] = ff_reverse[src[i]];
yading@10:             memset(src2 + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
yading@10:             src = src2;
yading@10:         }
yading@10:         ret = tiff_uncompress(zbuf, &outlen, src, size);
yading@10:         if (ret != Z_OK) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR,
yading@10:                    "Uncompressing failed (%lu of %lu) with error %d\n", outlen,
yading@10:                    (unsigned long)width * lines, ret);
yading@10:             av_free(src2);
yading@10:             av_free(zbuf);
yading@10:             return AVERROR_UNKNOWN;
yading@10:         }
yading@10:         src = zbuf;
yading@10:         for (line = 0; line < lines; line++) {
yading@10:             if(s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8){
yading@10:                 horizontal_fill(s->bpp, dst, 1, src, 0, width, 0);
yading@10:             }else{
yading@10:                 memcpy(dst, src, width);
yading@10:             }
yading@10:             dst += stride;
yading@10:             src += width;
yading@10:         }
yading@10:         av_free(src2);
yading@10:         av_free(zbuf);
yading@10:         return 0;
yading@10:     }
yading@10: #endif
yading@10:     if (s->compr == TIFF_LZW) {
yading@10:         if (s->fill_order) {
yading@10:             int i;
yading@10:             av_fast_padded_malloc(&s->deinvert_buf, &s->deinvert_buf_size, size);
yading@10:             if (!s->deinvert_buf)
yading@10:                 return AVERROR(ENOMEM);
yading@10:             for (i = 0; i < size; i++)
yading@10:                 s->deinvert_buf[i] = ff_reverse[src[i]];
yading@10:             src = s->deinvert_buf;
yading@10:             ssrc = src;
yading@10:         }
yading@10:         if (size > 1 && !src[0] && (src[1]&1)) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR, "Old style LZW is unsupported\n");
yading@10:         }
yading@10:         if ((ret = ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF)) < 0) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
yading@10:             return ret;
yading@10:         }
yading@10:     }
yading@10:     if (s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3
yading@10:         || s->compr == TIFF_G4) {
yading@10:         int i, ret = 0;
yading@10:         uint8_t *src2 = av_malloc((unsigned)size +
yading@10:                                   FF_INPUT_BUFFER_PADDING_SIZE);
yading@10: 
yading@10:         if (!src2) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR,
yading@10:                    "Error allocating temporary buffer\n");
yading@10:             return AVERROR(ENOMEM);
yading@10:         }
yading@10:         if (s->fax_opts & 2) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR,
yading@10:                    "Uncompressed fax mode is not supported (yet)\n");
yading@10:             av_free(src2);
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         if (!s->fill_order) {
yading@10:             memcpy(src2, src, size);
yading@10:         } else {
yading@10:             for (i = 0; i < size; i++)
yading@10:                 src2[i] = ff_reverse[src[i]];
yading@10:         }
yading@10:         memset(src2 + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
yading@10:         switch (s->compr) {
yading@10:         case TIFF_CCITT_RLE:
yading@10:         case TIFF_G3:
yading@10:         case TIFF_G4:
yading@10:             ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride,
yading@10:                                   s->compr, s->fax_opts);
yading@10:             break;
yading@10:         }
yading@10:         if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
yading@10:             for (line = 0; line < lines; line++) {
yading@10:                 horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
yading@10:                 dst += stride;
yading@10:             }
yading@10:         av_free(src2);
yading@10:         return ret;
yading@10:     }
yading@10:     for (line = 0; line < lines; line++) {
yading@10:         if (src - ssrc > size) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         switch (s->compr) {
yading@10:         case TIFF_RAW:
yading@10:             if (ssrc + size - src < width)
yading@10:                 return AVERROR_INVALIDDATA;
yading@10:             if (!s->fill_order) {
yading@10:                 horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
yading@10:                                 dst, 1, src, 0, width, 0);
yading@10:             } else {
yading@10:                 int i;
yading@10:                 for (i = 0; i < width; i++)
yading@10:                     dst[i] = ff_reverse[src[i]];
yading@10:             }
yading@10:             src += width;
yading@10:             break;
yading@10:         case TIFF_PACKBITS:
yading@10:             for (pixels = 0; pixels < width;) {
yading@10:                 if (ssrc + size - src < 2) {
yading@10:                     av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");
yading@10:                     return AVERROR_INVALIDDATA;
yading@10:                 }
yading@10:                 code = (int8_t) * src++;
yading@10:                 if (code >= 0) {
yading@10:                     code++;
yading@10:                     if (pixels + code > width) {
yading@10:                         av_log(s->avctx, AV_LOG_ERROR,
yading@10:                                "Copy went out of bounds\n");
yading@10:                         return AVERROR_INVALIDDATA;
yading@10:                     }
yading@10:                     if (ssrc + size - src < code) {
yading@10:                         av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");
yading@10:                         return AVERROR_INVALIDDATA;
yading@10:                     }
yading@10:                     horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
yading@10:                                     dst, 1, src, 0, code, pixels);
yading@10:                     src += code;
yading@10:                     pixels += code;
yading@10:                 } else if (code != -128) { // -127..-1
yading@10:                     code = (-code) + 1;
yading@10:                     if (pixels + code > width) {
yading@10:                         av_log(s->avctx, AV_LOG_ERROR,
yading@10:                                "Run went out of bounds\n");
yading@10:                         return AVERROR_INVALIDDATA;
yading@10:                     }
yading@10:                     c = *src++;
yading@10:                     horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
yading@10:                                     dst, 0, NULL, c, code, pixels);
yading@10:                     pixels += code;
yading@10:                 }
yading@10:             }
yading@10:             break;
yading@10:         case TIFF_LZW:
yading@10:             pixels = ff_lzw_decode(s->lzw, dst, width);
yading@10:             if (pixels < width) {
yading@10:                 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n",
yading@10:                        pixels, width);
yading@10:                 return AVERROR_INVALIDDATA;
yading@10:             }
yading@10:             if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
yading@10:                 horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
yading@10:             break;
yading@10:         }
yading@10:         dst += stride;
yading@10:     }
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int init_image(TiffContext *s, AVFrame *frame)
yading@10: {
yading@10:     int i, ret;
yading@10:     uint32_t *pal;
yading@10: 
yading@10:     switch (s->bpp * 10 + s->bppcount) {
yading@10:     case 11:
yading@10:         if (!s->palette_is_set) {
yading@10:             s->avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
yading@10:             break;
yading@10:         }
yading@10:     case 21:
yading@10:     case 41:
yading@10:     case 81:
yading@10:         s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
yading@10:         break;
yading@10:     case 243:
yading@10:         s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
yading@10:         break;
yading@10:     case 161:
yading@10:         s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GRAY16LE : AV_PIX_FMT_GRAY16BE;
yading@10:         break;
yading@10:     case 162:
yading@10:         s->avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
yading@10:         break;
yading@10:     case 324:
yading@10:         s->avctx->pix_fmt = AV_PIX_FMT_RGBA;
yading@10:         break;
yading@10:     case 483:
yading@10:         s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGB48LE : AV_PIX_FMT_RGB48BE;
yading@10:         break;
yading@10:     case 644:
yading@10:         s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGBA64LE : AV_PIX_FMT_RGBA64BE;
yading@10:         break;
yading@10:     default:
yading@10:         av_log(s->avctx, AV_LOG_ERROR,
yading@10:                "This format is not supported (bpp=%d, bppcount=%d)\n",
yading@10:                s->bpp, s->bppcount);
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10:     if (s->width != s->avctx->width || s->height != s->avctx->height) {
yading@10:         if ((ret = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
yading@10:             return ret;
yading@10:         avcodec_set_dimensions(s->avctx, s->width, s->height);
yading@10:     }
yading@10:     if ((ret = ff_get_buffer(s->avctx, frame, 0)) < 0)
yading@10:         return ret;
yading@10:     if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
yading@10:         if (s->palette_is_set) {
yading@10:             memcpy(frame->data[1], s->palette, sizeof(s->palette));
yading@10:         } else {
yading@10:             /* make default grayscale pal */
yading@10:             pal = (uint32_t *) frame->data[1];
yading@10:             for (i = 0; i < 1<<s->bpp; i++)
yading@10:                 pal[i] = 0xFFU << 24 | i * 255 / ((1<<s->bpp) - 1) * 0x010101;
yading@10:         }
yading@10:     }
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int tiff_decode_tag(TiffContext *s, AVFrame *frame)
yading@10: {
yading@10:     unsigned tag, type, count, off, value = 0;
yading@10:     int i, j, k, pos, start;
yading@10:     int ret;
yading@10:     uint32_t *pal;
yading@10:     double *dp;
yading@10: 
yading@10:     tag   = tget_short(&s->gb, s->le);
yading@10:     type  = tget_short(&s->gb, s->le);
yading@10:     count = tget_long(&s->gb, s->le);
yading@10:     off   = tget_long(&s->gb, s->le);
yading@10:     start = bytestream2_tell(&s->gb);
yading@10: 
yading@10:     if (type == 0 || type >= FF_ARRAY_ELEMS(type_sizes)) {
yading@10:         av_log(s->avctx, AV_LOG_DEBUG, "Unknown tiff type (%u) encountered\n",
yading@10:                type);
yading@10:         return 0;
yading@10:     }
yading@10: 
yading@10:     if (count == 1) {
yading@10:         switch (type) {
yading@10:         case TIFF_BYTE:
yading@10:         case TIFF_SHORT:
yading@10:             bytestream2_seek(&s->gb, -4, SEEK_CUR);
yading@10:             value = tget(&s->gb, type, s->le);
yading@10:             break;
yading@10:         case TIFF_LONG:
yading@10:             value = off;
yading@10:             break;
yading@10:         case TIFF_STRING:
yading@10:             if (count <= 4) {
yading@10:                 bytestream2_seek(&s->gb, -4, SEEK_CUR);
yading@10:                 break;
yading@10:             }
yading@10:         default:
yading@10:             value = UINT_MAX;
yading@10:             bytestream2_seek(&s->gb, off, SEEK_SET);
yading@10:         }
yading@10:     } else {
yading@10:         if (count <= 4 && type_sizes[type] * count <= 4) {
yading@10:             bytestream2_seek(&s->gb, -4, SEEK_CUR);
yading@10:         } else {
yading@10:             bytestream2_seek(&s->gb, off, SEEK_SET);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     switch (tag) {
yading@10:     case TIFF_WIDTH:
yading@10:         s->width = value;
yading@10:         break;
yading@10:     case TIFF_HEIGHT:
yading@10:         s->height = value;
yading@10:         break;
yading@10:     case TIFF_BPP:
yading@10:         s->bppcount = count;
yading@10:         if (count > 4) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR,
yading@10:                    "This format is not supported (bpp=%d, %d components)\n",
yading@10:                    s->bpp, count);
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         if (count == 1)
yading@10:             s->bpp = value;
yading@10:         else {
yading@10:             switch (type) {
yading@10:             case TIFF_BYTE:
yading@10:                 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) +
yading@10:                          ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
yading@10:                 break;
yading@10:             case TIFF_SHORT:
yading@10:             case TIFF_LONG:
yading@10:                 s->bpp = 0;
yading@10:                 if (bytestream2_get_bytes_left(&s->gb) < type_sizes[type] * count)
yading@10:                     return AVERROR_INVALIDDATA;
yading@10:                 for (i = 0; i < count; i++)
yading@10:                     s->bpp += tget(&s->gb, type, s->le);
yading@10:                 break;
yading@10:             default:
yading@10:                 s->bpp = -1;
yading@10:             }
yading@10:         }
yading@10:         break;
yading@10:     case TIFF_SAMPLES_PER_PIXEL:
yading@10:         if (count != 1) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR,
yading@10:                    "Samples per pixel requires a single value, many provided\n");
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         if (value > 4U) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR,
yading@10:                    "Samples per pixel %d is too large\n", value);
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         if (s->bppcount == 1)
yading@10:             s->bpp *= value;
yading@10:         s->bppcount = value;
yading@10:         break;
yading@10:     case TIFF_COMPR:
yading@10:         s->compr = value;
yading@10:         s->predictor = 0;
yading@10:         switch (s->compr) {
yading@10:         case TIFF_RAW:
yading@10:         case TIFF_PACKBITS:
yading@10:         case TIFF_LZW:
yading@10:         case TIFF_CCITT_RLE:
yading@10:             break;
yading@10:         case TIFF_G3:
yading@10:         case TIFF_G4:
yading@10:             s->fax_opts = 0;
yading@10:             break;
yading@10:         case TIFF_DEFLATE:
yading@10:         case TIFF_ADOBE_DEFLATE:
yading@10: #if CONFIG_ZLIB
yading@10:             break;
yading@10: #else
yading@10:             av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
yading@10:             return AVERROR(ENOSYS);
yading@10: #endif
yading@10:         case TIFF_JPEG:
yading@10:         case TIFF_NEWJPEG:
yading@10:             av_log(s->avctx, AV_LOG_ERROR,
yading@10:                    "JPEG compression is not supported\n");
yading@10:             return AVERROR_PATCHWELCOME;
yading@10:         default:
yading@10:             av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n",
yading@10:                    s->compr);
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         break;
yading@10:     case TIFF_ROWSPERSTRIP:
yading@10:         if (type == TIFF_LONG && value == UINT_MAX)
yading@10:             value = s->height;
yading@10:         if (value < 1) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR,
yading@10:                    "Incorrect value of rows per strip\n");
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         s->rps = value;
yading@10:         break;
yading@10:     case TIFF_STRIP_OFFS:
yading@10:         if (count == 1) {
yading@10:             s->strippos = 0;
yading@10:             s->stripoff = value;
yading@10:         } else
yading@10:             s->strippos = off;
yading@10:         s->strips = count;
yading@10:         if (s->strips == 1)
yading@10:             s->rps = s->height;
yading@10:         s->sot = type;
yading@10:         if (s->strippos > bytestream2_size(&s->gb)) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR,
yading@10:                    "Tag referencing position outside the image\n");
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         break;
yading@10:     case TIFF_STRIP_SIZE:
yading@10:         if (count == 1) {
yading@10:             s->stripsizesoff = 0;
yading@10:             s->stripsize = value;
yading@10:             s->strips = 1;
yading@10:         } else {
yading@10:             s->stripsizesoff = off;
yading@10:         }
yading@10:         s->strips = count;
yading@10:         s->sstype = type;
yading@10:         if (s->stripsizesoff > bytestream2_size(&s->gb)) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR,
yading@10:                    "Tag referencing position outside the image\n");
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         break;
yading@10:     case TIFF_TILE_BYTE_COUNTS:
yading@10:     case TIFF_TILE_LENGTH:
yading@10:     case TIFF_TILE_OFFSETS:
yading@10:     case TIFF_TILE_WIDTH:
yading@10:         av_log(s->avctx, AV_LOG_ERROR, "Tiled images are not supported\n");
yading@10:         return AVERROR_PATCHWELCOME;
yading@10:         break;
yading@10:     case TIFF_PREDICTOR:
yading@10:         s->predictor = value;
yading@10:         break;
yading@10:     case TIFF_INVERT:
yading@10:         switch (value) {
yading@10:         case 0:
yading@10:             s->invert = 1;
yading@10:             break;
yading@10:         case 1:
yading@10:             s->invert = 0;
yading@10:             break;
yading@10:         case 2:
yading@10:         case 3:
yading@10:             break;
yading@10:         default:
yading@10:             av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n",
yading@10:                    value);
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         break;
yading@10:     case TIFF_FILL_ORDER:
yading@10:         if (value < 1 || value > 2) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR,
yading@10:                    "Unknown FillOrder value %d, trying default one\n", value);
yading@10:             value = 1;
yading@10:         }
yading@10:         s->fill_order = value - 1;
yading@10:         break;
yading@10:     case TIFF_PAL:
yading@10:         pal = (uint32_t *) s->palette;
yading@10:         off = type_sizes[type];
yading@10:         if (count / 3 > 256 || bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         off = (type_sizes[type] - 1) << 3;
yading@10:         for (k = 2; k >= 0; k--) {
yading@10:             for (i = 0; i < count / 3; i++) {
yading@10:                 if (k == 2)
yading@10:                     pal[i] = 0xFFU << 24;
yading@10:                 j =  (tget(&s->gb, type, s->le) >> off) << (k * 8);
yading@10:                 pal[i] |= j;
yading@10:             }
yading@10:         }
yading@10:         s->palette_is_set = 1;
yading@10:         break;
yading@10:     case TIFF_PLANAR:
yading@10:         if (value == 2) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
yading@10:             return AVERROR_PATCHWELCOME;
yading@10:         }
yading@10:         break;
yading@10:     case TIFF_T4OPTIONS:
yading@10:         if (s->compr == TIFF_G3)
yading@10:             s->fax_opts = value;
yading@10:         break;
yading@10:     case TIFF_T6OPTIONS:
yading@10:         if (s->compr == TIFF_G4)
yading@10:             s->fax_opts = value;
yading@10:         break;
yading@10: #define ADD_METADATA(count, name, sep)\
yading@10:     if ((ret = add_metadata(count, type, name, sep, s, frame)) < 0) {\
yading@10:         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\
yading@10:         return ret;\
yading@10:     }
yading@10:     case TIFF_MODEL_PIXEL_SCALE:
yading@10:         ADD_METADATA(count, "ModelPixelScaleTag", NULL);
yading@10:         break;
yading@10:     case TIFF_MODEL_TRANSFORMATION:
yading@10:         ADD_METADATA(count, "ModelTransformationTag", NULL);
yading@10:         break;
yading@10:     case TIFF_MODEL_TIEPOINT:
yading@10:         ADD_METADATA(count, "ModelTiepointTag", NULL);
yading@10:         break;
yading@10:     case TIFF_GEO_KEY_DIRECTORY:
yading@10:         ADD_METADATA(1, "GeoTIFF_Version", NULL);
yading@10:         ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");
yading@10:         s->geotag_count   = tget_short(&s->gb, s->le);
yading@10:         if (s->geotag_count > count / 4 - 1) {
yading@10:             s->geotag_count = count / 4 - 1;
yading@10:             av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n");
yading@10:         }
yading@10:         if (bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4) {
yading@10:             s->geotag_count = 0;
yading@10:             return -1;
yading@10:         }
yading@10:         s->geotags = av_mallocz(sizeof(TiffGeoTag) * s->geotag_count);
yading@10:         if (!s->geotags) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
yading@10:             s->geotag_count = 0;
yading@10:             return AVERROR(ENOMEM);
yading@10:         }
yading@10:         for (i = 0; i < s->geotag_count; i++) {
yading@10:             s->geotags[i].key    = tget_short(&s->gb, s->le);
yading@10:             s->geotags[i].type   = tget_short(&s->gb, s->le);
yading@10:             s->geotags[i].count  = tget_short(&s->gb, s->le);
yading@10: 
yading@10:             if (!s->geotags[i].type)
yading@10:                 s->geotags[i].val  = get_geokey_val(s->geotags[i].key, tget_short(&s->gb, s->le));
yading@10:             else
yading@10:                 s->geotags[i].offset = tget_short(&s->gb, s->le);
yading@10:         }
yading@10:         break;
yading@10:     case TIFF_GEO_DOUBLE_PARAMS:
yading@10:         if (count >= INT_MAX / sizeof(int64_t))
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         dp = av_malloc(count * sizeof(double));
yading@10:         if (!dp) {
yading@10:             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
yading@10:             return AVERROR(ENOMEM);
yading@10:         }
yading@10:         for (i = 0; i < count; i++)
yading@10:             dp[i] = tget_double(&s->gb, s->le);
yading@10:         for (i = 0; i < s->geotag_count; i++) {
yading@10:             if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) {
yading@10:                 if (s->geotags[i].count == 0
yading@10:                     || s->geotags[i].offset + s->geotags[i].count > count) {
yading@10:                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);
yading@10:                 } else {
yading@10:                     char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");
yading@10:                     if (!ap) {
yading@10:                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
yading@10:                         av_freep(&dp);
yading@10:                         return AVERROR(ENOMEM);
yading@10:                     }
yading@10:                     s->geotags[i].val = ap;
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:         av_freep(&dp);
yading@10:         break;
yading@10:     case TIFF_GEO_ASCII_PARAMS:
yading@10:         pos = bytestream2_tell(&s->gb);
yading@10:         for (i = 0; i < s->geotag_count; i++) {
yading@10:             if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) {
yading@10:                 if (s->geotags[i].count == 0
yading@10:                     || s->geotags[i].offset +  s->geotags[i].count > count) {
yading@10:                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);
yading@10:                 } else {
yading@10:                     char *ap;
yading@10: 
yading@10:                     bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);
yading@10:                     if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)
yading@10:                         return AVERROR_INVALIDDATA;
yading@10:                     ap = av_malloc(s->geotags[i].count);
yading@10:                     if (!ap) {
yading@10:                         av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
yading@10:                         return AVERROR(ENOMEM);
yading@10:                     }
yading@10:                     bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);
yading@10:                     ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte
yading@10:                     s->geotags[i].val = ap;
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:         break;
yading@10:     case TIFF_ARTIST:
yading@10:         ADD_METADATA(count, "artist", NULL);
yading@10:         break;
yading@10:     case TIFF_COPYRIGHT:
yading@10:         ADD_METADATA(count, "copyright", NULL);
yading@10:         break;
yading@10:     case TIFF_DATE:
yading@10:         ADD_METADATA(count, "date", NULL);
yading@10:         break;
yading@10:     case TIFF_DOCUMENT_NAME:
yading@10:         ADD_METADATA(count, "document_name", NULL);
yading@10:         break;
yading@10:     case TIFF_HOST_COMPUTER:
yading@10:         ADD_METADATA(count, "computer", NULL);
yading@10:         break;
yading@10:     case TIFF_IMAGE_DESCRIPTION:
yading@10:         ADD_METADATA(count, "description", NULL);
yading@10:         break;
yading@10:     case TIFF_MAKE:
yading@10:         ADD_METADATA(count, "make", NULL);
yading@10:         break;
yading@10:     case TIFF_MODEL:
yading@10:         ADD_METADATA(count, "model", NULL);
yading@10:         break;
yading@10:     case TIFF_PAGE_NAME:
yading@10:         ADD_METADATA(count, "page_name", NULL);
yading@10:         break;
yading@10:     case TIFF_PAGE_NUMBER:
yading@10:         ADD_METADATA(count, "page_number", " / ");
yading@10:         break;
yading@10:     case TIFF_SOFTWARE_NAME:
yading@10:         ADD_METADATA(count, "software", NULL);
yading@10:         break;
yading@10:     default:
yading@10:         av_log(s->avctx, AV_LOG_DEBUG, "Unknown or unsupported tag %d/0X%0X\n",
yading@10:                tag, tag);
yading@10:     }
yading@10:     bytestream2_seek(&s->gb, start, SEEK_SET);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int decode_frame(AVCodecContext *avctx,
yading@10:                         void *data, int *got_frame, AVPacket *avpkt)
yading@10: {
yading@10:     TiffContext *const s = avctx->priv_data;
yading@10:     AVFrame *const p = data;
yading@10:     unsigned off;
yading@10:     int id, le, ret;
yading@10:     int i, j, entries;
yading@10:     int stride;
yading@10:     unsigned soff, ssize;
yading@10:     uint8_t *dst;
yading@10:     GetByteContext stripsizes;
yading@10:     GetByteContext stripdata;
yading@10: 
yading@10:     bytestream2_init(&s->gb, avpkt->data, avpkt->size);
yading@10: 
yading@10:     //parse image header
yading@10:     if (avpkt->size < 8)
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     id = bytestream2_get_le16u(&s->gb);
yading@10:     if (id == 0x4949)
yading@10:         le = 1;
yading@10:     else if (id == 0x4D4D)
yading@10:         le = 0;
yading@10:     else {
yading@10:         av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10:     s->le = le;
yading@10:     // TIFF_BPP is not a required tag and defaults to 1
yading@10:     s->bppcount = s->bpp = 1;
yading@10:     s->invert = 0;
yading@10:     s->compr = TIFF_RAW;
yading@10:     s->fill_order = 0;
yading@10:     free_geotags(s);
yading@10: 
yading@10:     // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
yading@10:     // that further identifies the file as a TIFF file"
yading@10:     if (tget_short(&s->gb, le) != 42) {
yading@10:         av_log(avctx, AV_LOG_ERROR,
yading@10:                "The answer to life, universe and everything is not correct!\n");
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10:     // Reset these offsets so we can tell if they were set this frame
yading@10:     s->stripsizesoff = s->strippos = 0;
yading@10:     /* parse image file directory */
yading@10:     off = tget_long(&s->gb, le);
yading@10:     if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10:     bytestream2_seek(&s->gb, off, SEEK_SET);
yading@10:     entries = tget_short(&s->gb, le);
yading@10:     if (bytestream2_get_bytes_left(&s->gb) < entries * 12)
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     for (i = 0; i < entries; i++) {
yading@10:         if ((ret = tiff_decode_tag(s, p)) < 0)
yading@10:             return ret;
yading@10:     }
yading@10: 
yading@10:     for (i = 0; i<s->geotag_count; i++) {
yading@10:         const char *keyname = get_geokey_name(s->geotags[i].key);
yading@10:         if (!keyname) {
yading@10:             av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);
yading@10:             continue;
yading@10:         }
yading@10:         if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {
yading@10:             av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);
yading@10:             continue;
yading@10:         }
yading@10:         ret = av_dict_set(avpriv_frame_get_metadatap(p), keyname, s->geotags[i].val, 0);
yading@10:         if (ret<0) {
yading@10:             av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);
yading@10:             return ret;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     if (!s->strippos && !s->stripoff) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10:     /* now we have the data and may start decoding */
yading@10:     if ((ret = init_image(s, p)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     if (s->strips == 1 && !s->stripsize) {
yading@10:         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
yading@10:         s->stripsize = avpkt->size - s->stripoff;
yading@10:     }
yading@10:     stride = p->linesize[0];
yading@10:     dst = p->data[0];
yading@10: 
yading@10:     if (s->stripsizesoff) {
yading@10:         if (s->stripsizesoff >= (unsigned)avpkt->size)
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff, avpkt->size - s->stripsizesoff);
yading@10:     }
yading@10:     if (s->strippos) {
yading@10:         if (s->strippos >= (unsigned)avpkt->size)
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         bytestream2_init(&stripdata, avpkt->data + s->strippos, avpkt->size - s->strippos);
yading@10:     }
yading@10: 
yading@10:     if (s->rps <= 0) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10: 
yading@10:     for (i = 0; i < s->height; i += s->rps) {
yading@10:         if (s->stripsizesoff)
yading@10:             ssize = tget(&stripsizes, s->sstype, s->le);
yading@10:         else
yading@10:             ssize = s->stripsize;
yading@10: 
yading@10:         if (s->strippos)
yading@10:             soff = tget(&stripdata, s->sot, s->le);
yading@10:         else
yading@10:             soff = s->stripoff;
yading@10: 
yading@10:         if (soff > avpkt->size || ssize > avpkt->size - soff) {
yading@10:             av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         if (tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize,
yading@10:                               FFMIN(s->rps, s->height - i)) < 0)
yading@10:             break;
yading@10:         dst += s->rps * stride;
yading@10:     }
yading@10:     if (s->predictor == 2) {
yading@10:         dst = p->data[0];
yading@10:         soff = s->bpp >> 3;
yading@10:         ssize = s->width * soff;
yading@10:         if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||
yading@10:             s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE) {
yading@10:             for (i = 0; i < s->height; i++) {
yading@10:                 for (j = soff; j < ssize; j += 2)
yading@10:                     AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));
yading@10:                 dst += stride;
yading@10:             }
yading@10:         } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||
yading@10:                    s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {
yading@10:             for (i = 0; i < s->height; i++) {
yading@10:                 for (j = soff; j < ssize; j += 2)
yading@10:                     AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));
yading@10:                 dst += stride;
yading@10:             }
yading@10:         } else {
yading@10:             for (i = 0; i < s->height; i++) {
yading@10:                 for (j = soff; j < ssize; j++)
yading@10:                     dst[j] += dst[j - soff];
yading@10:                 dst += stride;
yading@10:             }
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     if (s->invert) {
yading@10:         dst = p->data[0];
yading@10:         for (i = 0; i < s->height; i++) {
yading@10:             for (j = 0; j < p->linesize[0]; j++)
yading@10:                 dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];
yading@10:             dst += p->linesize[0];
yading@10:         }
yading@10:     }
yading@10:     *got_frame = 1;
yading@10: 
yading@10:     return avpkt->size;
yading@10: }
yading@10: 
yading@10: static av_cold int tiff_init(AVCodecContext *avctx)
yading@10: {
yading@10:     TiffContext *s = avctx->priv_data;
yading@10: 
yading@10:     s->width = 0;
yading@10:     s->height = 0;
yading@10:     s->avctx = avctx;
yading@10:     ff_lzw_decode_open(&s->lzw);
yading@10:     ff_ccitt_unpack_init();
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_cold int tiff_end(AVCodecContext *avctx)
yading@10: {
yading@10:     TiffContext *const s = avctx->priv_data;
yading@10: 
yading@10:     free_geotags(s);
yading@10: 
yading@10:     ff_lzw_decode_close(&s->lzw);
yading@10:     av_freep(&s->deinvert_buf);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: AVCodec ff_tiff_decoder = {
yading@10:     .name           = "tiff",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_TIFF,
yading@10:     .priv_data_size = sizeof(TiffContext),
yading@10:     .init           = tiff_init,
yading@10:     .close          = tiff_end,
yading@10:     .decode         = decode_frame,
yading@10:     .capabilities   = CODEC_CAP_DR1,
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),
yading@10: };