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