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ffmpeg/libavcodec/tiff.c
Hendrik Leppkes edcc51fb8e tiff: fix handling of metadata with refcounted frames 
Since the conversion to refcounted frames, the tiff decoder
only wrote the metadata into its internal "picture" in its own context,
never exposing the metadata to the user, and eventually leaking the
metadata.

Instead, properly store the metadata directly into the frame being decoded into.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-03-13 22:13:59 +01:00

1238 lines
39 KiB
C
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/*
* 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;
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)
{
TiffGeoTagKeyName *r = bsearch(&id, keys, n, sizeof(keys[0]), cmp_id_key);
if(r)
return r->name;
return NULL;
}
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:
ap = av_strdup(search_keyval(ff_tiff_proj_cs_type_codes, FF_ARRAY_ELEMS(ff_tiff_proj_cs_type_codes), val));
if(ap) return ap;
break;
case TIFF_PROJECTION_GEOKEY:
ap = av_strdup(search_keyval(ff_tiff_projection_codes, FF_ARRAY_ELEMS(ff_tiff_projection_codes), val));
if(ap) return ap;
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;
uint64_t component_len;
if (!sep) sep = ", ";
component_len = 15LL + strlen(sep);
if (count >= (INT_MAX - 1)/component_len)
return NULL;
ap = av_malloc(component_len * count + 1);
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;
uint64_t component_len;
if (!sep) sep = ", ";
component_len = 7LL + strlen(sep);
if (count >= (INT_MAX - 1)/component_len)
return NULL;
ap = av_malloc(component_len * count + 1);
if (!ap)
return NULL;
ap0 = ap;
ap[0] = '\0';
for (i = 0; i < count; i++) {
unsigned l = snprintf(ap, component_len, "%d%s", sp[i], sep);
if (l >= component_len) {
av_free(ap0);
return NULL;
}
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, AVFrame *frame)
{
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(avpriv_frame_get_metadatap(frame), name, ap, AV_DICT_DONT_STRDUP_VAL);
return 0;
}
static int add_shorts_metadata(int count, const char *name,
const char *sep, TiffContext *s, AVFrame *frame)
{
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(avpriv_frame_get_metadatap(frame), name, ap, AV_DICT_DONT_STRDUP_VAL);
return 0;
}
static int add_string_metadata(int count, const char *name,
TiffContext *s, AVFrame *frame)
{
char *value;
if (bytestream2_get_bytes_left(&s->gb) < count || count < 0)
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(avpriv_frame_get_metadatap(frame), 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, AVFrame *frame)
{
switch(type) {
case TIFF_DOUBLE: return add_doubles_metadata(count, name, sep, s, frame);
case TIFF_SHORT : return add_shorts_metadata(count, name, sep, s, frame);
case TIFF_STRING: return add_string_metadata(count, name, s, frame);
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, AVFrame *frame)
{
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 ((ret = ff_get_buffer(s->avctx, frame, 0)) < 0)
return ret;
if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
if (s->palette_is_set) {
memcpy(frame->data[1], s->palette, sizeof(s->palette));
} else {
/* make default grayscale pal */
pal = (uint32_t *) frame->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, AVFrame *frame)
{
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 (value > 4U) {
av_log(s->avctx, AV_LOG_ERROR,
"Samples per pixel %d is too large\n", value);
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, frame)) < 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) {
s->geotag_count = 0;
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");
s->geotag_count = 0;
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 *const p = data;
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);
// 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, p)) < 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(avpriv_frame_get_metadatap(p), 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, p)) < 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 = p->data[0];
for (i = 0; i < s->height; i++) {
for (j = 0; j < p->linesize[0]; j++)
dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];
dst += p->linesize[0];
}
}
*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;
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);
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"),
};
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