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7ca5338b49
Since image initialization was moved after tag parsing, the palette needs to be specified in the context and then copied to the allocated image in init_image(). Fixes a regression with TIFF images that have palette data, trac issue #230, file Test_Flate_8bpp.tif. Signed-off-by: Diego Biurrun <diego@biurrun.de>
633 lines
18 KiB
C
633 lines
18 KiB
C
/*
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* TIFF image decoder
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* Copyright (c) 2006 Konstantin Shishkov
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* TIFF image decoder
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* @file
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* @author Konstantin Shishkov
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*/
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#include "avcodec.h"
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#if CONFIG_ZLIB
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#include <zlib.h>
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#endif
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#include "lzw.h"
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#include "tiff.h"
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#include "faxcompr.h"
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/imgutils.h"
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typedef struct TiffContext {
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AVCodecContext *avctx;
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AVFrame picture;
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int width, height;
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unsigned int bpp, bppcount;
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uint32_t palette[256];
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int palette_is_set;
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int le;
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enum TiffCompr compr;
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int invert;
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int fax_opts;
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int predictor;
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int fill_order;
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int strips, rps, sstype;
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int sot;
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const uint8_t* stripdata;
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const uint8_t* stripsizes;
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int stripsize, stripoff;
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LZWState *lzw;
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} TiffContext;
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static int tget_short(const uint8_t **p, int le){
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int v = le ? AV_RL16(*p) : AV_RB16(*p);
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*p += 2;
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return v;
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}
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static int tget_long(const uint8_t **p, int le){
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int v = le ? AV_RL32(*p) : AV_RB32(*p);
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*p += 4;
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return v;
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}
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static int tget(const uint8_t **p, int type, int le){
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switch(type){
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case TIFF_BYTE : return *(*p)++;
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case TIFF_SHORT: return tget_short(p, le);
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case TIFF_LONG : return tget_long (p, le);
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default : return -1;
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}
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}
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#if CONFIG_ZLIB
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static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
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{
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z_stream zstream;
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int zret;
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memset(&zstream, 0, sizeof(zstream));
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zstream.next_in = src;
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zstream.avail_in = size;
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zstream.next_out = dst;
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zstream.avail_out = *len;
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zret = inflateInit(&zstream);
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if (zret != Z_OK) {
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av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
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return zret;
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}
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zret = inflate(&zstream, Z_SYNC_FLUSH);
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inflateEnd(&zstream);
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*len = zstream.total_out;
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return zret == Z_STREAM_END ? Z_OK : zret;
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}
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#endif
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static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
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int c, line, pixels, code;
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const uint8_t *ssrc = src;
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int width = s->width * s->bpp >> 3;
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#if CONFIG_ZLIB
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uint8_t *zbuf; unsigned long outlen;
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if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
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int ret;
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outlen = width * lines;
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zbuf = av_malloc(outlen);
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ret = tiff_uncompress(zbuf, &outlen, src, size);
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if(ret != Z_OK){
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av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu) with error %d\n", outlen, (unsigned long)width * lines, ret);
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av_free(zbuf);
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return -1;
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}
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src = zbuf;
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for(line = 0; line < lines; line++){
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memcpy(dst, src, width);
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dst += stride;
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src += width;
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}
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av_free(zbuf);
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return 0;
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}
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#endif
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if(s->compr == TIFF_LZW){
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if(ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0){
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av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
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return -1;
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}
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}
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if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
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int i, ret = 0;
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uint8_t *src2 = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
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if(!src2 || (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE < (unsigned)size){
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av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
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return -1;
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}
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if(s->fax_opts & 2){
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av_log(s->avctx, AV_LOG_ERROR, "Uncompressed fax mode is not supported (yet)\n");
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av_free(src2);
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return -1;
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}
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if(!s->fill_order){
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memcpy(src2, src, size);
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}else{
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for(i = 0; i < size; i++)
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src2[i] = av_reverse[src[i]];
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}
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memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
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switch(s->compr){
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case TIFF_CCITT_RLE:
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case TIFF_G3:
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case TIFF_G4:
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ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr, s->fax_opts);
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break;
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}
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av_free(src2);
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return ret;
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}
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for(line = 0; line < lines; line++){
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if(src - ssrc > size){
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av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
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return -1;
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}
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switch(s->compr){
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case TIFF_RAW:
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if (!s->fill_order) {
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memcpy(dst, src, width);
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} else {
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int i;
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for (i = 0; i < width; i++)
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dst[i] = av_reverse[src[i]];
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}
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src += width;
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break;
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case TIFF_PACKBITS:
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for(pixels = 0; pixels < width;){
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code = (int8_t)*src++;
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if(code >= 0){
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code++;
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if(pixels + code > width){
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av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
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return -1;
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}
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memcpy(dst + pixels, src, code);
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src += code;
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pixels += code;
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}else if(code != -128){ // -127..-1
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code = (-code) + 1;
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if(pixels + code > width){
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av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
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return -1;
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}
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c = *src++;
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memset(dst + pixels, c, code);
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pixels += code;
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}
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}
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break;
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case TIFF_LZW:
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pixels = ff_lzw_decode(s->lzw, dst, width);
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if(pixels < width){
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av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
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return -1;
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}
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break;
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}
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dst += stride;
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}
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return 0;
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}
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static int init_image(TiffContext *s)
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{
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int i, ret;
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uint32_t *pal;
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switch (s->bpp * 10 + s->bppcount) {
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case 11:
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s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
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break;
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case 81:
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s->avctx->pix_fmt = PIX_FMT_PAL8;
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break;
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case 243:
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s->avctx->pix_fmt = PIX_FMT_RGB24;
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break;
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case 161:
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s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
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break;
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case 324:
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s->avctx->pix_fmt = PIX_FMT_RGBA;
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break;
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case 483:
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s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
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break;
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default:
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av_log(s->avctx, AV_LOG_ERROR,
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"This format is not supported (bpp=%d, bppcount=%d)\n",
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s->bpp, s->bppcount);
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return AVERROR_INVALIDDATA;
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}
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if (s->width != s->avctx->width || s->height != s->avctx->height) {
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if ((ret = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
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return ret;
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avcodec_set_dimensions(s->avctx, s->width, s->height);
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}
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if (s->picture.data[0])
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s->avctx->release_buffer(s->avctx, &s->picture);
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if ((ret = s->avctx->get_buffer(s->avctx, &s->picture)) < 0) {
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av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return ret;
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}
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if (s->avctx->pix_fmt == PIX_FMT_PAL8) {
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if (s->palette_is_set) {
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memcpy(s->picture.data[1], s->palette, sizeof(s->palette));
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} else {
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/* make default grayscale pal */
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pal = (uint32_t *) s->picture.data[1];
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for (i = 0; i < 256; i++)
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pal[i] = i * 0x010101;
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}
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}
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return 0;
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}
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static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
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{
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int tag, type, count, off, value = 0;
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int i, j;
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uint32_t *pal;
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const uint8_t *rp, *gp, *bp;
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tag = tget_short(&buf, s->le);
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type = tget_short(&buf, s->le);
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count = tget_long(&buf, s->le);
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off = tget_long(&buf, s->le);
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if(count == 1){
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switch(type){
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case TIFF_BYTE:
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case TIFF_SHORT:
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buf -= 4;
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value = tget(&buf, type, s->le);
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buf = NULL;
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break;
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case TIFF_LONG:
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value = off;
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buf = NULL;
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break;
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case TIFF_STRING:
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if(count <= 4){
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buf -= 4;
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break;
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}
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default:
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value = -1;
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buf = start + off;
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}
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}else if(type_sizes[type] * count <= 4){
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buf -= 4;
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}else{
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buf = start + off;
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}
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if(buf && (buf < start || buf > end_buf)){
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av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
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return -1;
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}
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switch(tag){
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case TIFF_WIDTH:
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s->width = value;
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break;
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case TIFF_HEIGHT:
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s->height = value;
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break;
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case TIFF_BPP:
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s->bppcount = count;
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if(count > 4){
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av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
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return -1;
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}
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if(count == 1) s->bpp = value;
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else{
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switch(type){
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case TIFF_BYTE:
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s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
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break;
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case TIFF_SHORT:
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case TIFF_LONG:
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s->bpp = 0;
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for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
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break;
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default:
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s->bpp = -1;
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}
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}
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break;
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case TIFF_SAMPLES_PER_PIXEL:
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if (count != 1) {
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av_log(s->avctx, AV_LOG_ERROR,
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"Samples per pixel requires a single value, many provided\n");
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return AVERROR_INVALIDDATA;
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}
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if (s->bppcount == 1)
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s->bpp *= value;
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s->bppcount = value;
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break;
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case TIFF_COMPR:
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s->compr = value;
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s->predictor = 0;
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switch(s->compr){
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case TIFF_RAW:
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case TIFF_PACKBITS:
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case TIFF_LZW:
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case TIFF_CCITT_RLE:
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break;
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case TIFF_G3:
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case TIFF_G4:
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s->fax_opts = 0;
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break;
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case TIFF_DEFLATE:
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case TIFF_ADOBE_DEFLATE:
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#if CONFIG_ZLIB
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break;
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#else
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av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
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return -1;
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#endif
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case TIFF_JPEG:
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case TIFF_NEWJPEG:
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av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
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return -1;
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default:
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av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
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return -1;
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}
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break;
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case TIFF_ROWSPERSTRIP:
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if(type == TIFF_LONG && value == -1)
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value = s->avctx->height;
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if(value < 1){
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av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
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return -1;
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}
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s->rps = value;
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break;
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case TIFF_STRIP_OFFS:
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if(count == 1){
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s->stripdata = NULL;
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s->stripoff = value;
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}else
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s->stripdata = start + off;
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s->strips = count;
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if(s->strips == 1) s->rps = s->height;
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s->sot = type;
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if(s->stripdata > end_buf){
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av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
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return -1;
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}
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break;
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case TIFF_STRIP_SIZE:
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if(count == 1){
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s->stripsizes = NULL;
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s->stripsize = value;
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s->strips = 1;
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}else{
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s->stripsizes = start + off;
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}
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s->strips = count;
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s->sstype = type;
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if(s->stripsizes > end_buf){
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av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
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return -1;
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}
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break;
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case TIFF_PREDICTOR:
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s->predictor = value;
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break;
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case TIFF_INVERT:
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switch(value){
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case 0:
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s->invert = 1;
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break;
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case 1:
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s->invert = 0;
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break;
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case 2:
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case 3:
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break;
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default:
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av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
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return -1;
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}
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break;
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case TIFF_FILL_ORDER:
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if(value < 1 || value > 2){
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av_log(s->avctx, AV_LOG_ERROR, "Unknown FillOrder value %d, trying default one\n", value);
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value = 1;
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}
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s->fill_order = value - 1;
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break;
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case TIFF_PAL:
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pal = (uint32_t *) s->palette;
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off = type_sizes[type];
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rp = buf;
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gp = buf + count / 3 * off;
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bp = buf + count / 3 * off * 2;
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off = (type_sizes[type] - 1) << 3;
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for(i = 0; i < count / 3; i++){
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j = (tget(&rp, type, s->le) >> off) << 16;
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j |= (tget(&gp, type, s->le) >> off) << 8;
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j |= tget(&bp, type, s->le) >> off;
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pal[i] = j;
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}
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s->palette_is_set = 1;
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break;
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case TIFF_PLANAR:
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if(value == 2){
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av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
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return -1;
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}
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break;
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case TIFF_T4OPTIONS:
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if(s->compr == TIFF_G3)
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s->fax_opts = value;
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break;
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case TIFF_T6OPTIONS:
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if(s->compr == TIFF_G4)
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s->fax_opts = value;
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break;
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}
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return 0;
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}
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static int decode_frame(AVCodecContext *avctx,
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void *data, int *data_size,
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AVPacket *avpkt)
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{
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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TiffContext * const s = avctx->priv_data;
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AVFrame *picture = data;
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AVFrame * const p= (AVFrame*)&s->picture;
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const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
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int id, le, off, ret;
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int i, j, entries;
|
|
int stride, soff, ssize;
|
|
uint8_t *dst;
|
|
|
|
//parse image header
|
|
id = AV_RL16(buf); buf += 2;
|
|
if(id == 0x4949) le = 1;
|
|
else if(id == 0x4D4D) le = 0;
|
|
else{
|
|
av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
|
|
return -1;
|
|
}
|
|
s->le = le;
|
|
s->invert = 0;
|
|
s->compr = TIFF_RAW;
|
|
s->fill_order = 0;
|
|
// 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(&buf, le) != 42){
|
|
av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
|
|
return -1;
|
|
}
|
|
/* parse image file directory */
|
|
off = tget_long(&buf, le);
|
|
if(orig_buf + off + 14 >= end_buf){
|
|
av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
|
|
return -1;
|
|
}
|
|
buf = orig_buf + off;
|
|
entries = tget_short(&buf, le);
|
|
for(i = 0; i < entries; i++){
|
|
if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
|
|
return -1;
|
|
buf += 12;
|
|
}
|
|
if(!s->stripdata && !s->stripoff){
|
|
av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
|
|
return -1;
|
|
}
|
|
/* 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 = buf_size - s->stripoff;
|
|
}
|
|
stride = p->linesize[0];
|
|
dst = p->data[0];
|
|
for(i = 0; i < s->height; i += s->rps){
|
|
if(s->stripsizes)
|
|
ssize = tget(&s->stripsizes, s->sstype, s->le);
|
|
else
|
|
ssize = s->stripsize;
|
|
|
|
if (ssize > buf_size) {
|
|
av_log(avctx, AV_LOG_ERROR, "Buffer size is smaller than strip size\n");
|
|
return -1;
|
|
}
|
|
|
|
if(s->stripdata){
|
|
soff = tget(&s->stripdata, s->sot, s->le);
|
|
}else
|
|
soff = s->stripoff;
|
|
if (soff < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid stripoff: %d\n", soff);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if(tiff_unpack_strip(s, dst, stride, orig_buf + 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;
|
|
for(i = 0; i < s->height; i++) {
|
|
for(j = soff; j < ssize; j++)
|
|
dst[j] += dst[j - soff];
|
|
dst += stride;
|
|
}
|
|
}
|
|
|
|
if(s->invert){
|
|
uint8_t *src;
|
|
int j;
|
|
|
|
src = s->picture.data[0];
|
|
for(j = 0; j < s->height; j++){
|
|
for(i = 0; i < s->picture.linesize[0]; i++)
|
|
src[i] = 255 - src[i];
|
|
src += s->picture.linesize[0];
|
|
}
|
|
}
|
|
*picture= *(AVFrame*)&s->picture;
|
|
*data_size = sizeof(AVPicture);
|
|
|
|
return buf_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((AVFrame*)&s->picture);
|
|
avctx->coded_frame= (AVFrame*)&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;
|
|
|
|
ff_lzw_decode_close(&s->lzw);
|
|
if(s->picture.data[0])
|
|
avctx->release_buffer(avctx, &s->picture);
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_tiff_decoder = {
|
|
"tiff",
|
|
AVMEDIA_TYPE_VIDEO,
|
|
CODEC_ID_TIFF,
|
|
sizeof(TiffContext),
|
|
tiff_init,
|
|
NULL,
|
|
tiff_end,
|
|
decode_frame,
|
|
CODEC_CAP_DR1,
|
|
NULL,
|
|
.long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
|
|
};
|