ffmpeg / libavcodec / tiff.c @ d36beb3f
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/*
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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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "libavcore/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; |
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int le;
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int 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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memcpy(dst, src, width); |
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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 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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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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switch(s->bpp*10 + count){ |
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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, "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(s->width != s->avctx->width || s->height != s->avctx->height){
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if(av_image_check_size(s->width, s->height, 0, s->avctx)) |
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return -1; |
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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(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 -1; |
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} |
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if(s->bpp == 8){ |
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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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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; |
346 |
#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; |
351 |
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; |
354 |
} |
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break;
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356 |
case TIFF_ROWSPERSTRIP:
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if(type == TIFF_LONG && value == -1) |
358 |
value = s->avctx->height; |
359 |
if(value < 1){ |
360 |
av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
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return -1; |
362 |
} |
363 |
s->rps = value; |
364 |
break;
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case TIFF_STRIP_OFFS:
|
366 |
if(count == 1){ |
367 |
s->stripdata = NULL;
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368 |
s->stripoff = value; |
369 |
}else
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s->stripdata = start + off; |
371 |
s->strips = count; |
372 |
if(s->strips == 1) s->rps = s->height; |
373 |
s->sot = type; |
374 |
if(s->stripdata > end_buf){
|
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av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
|
376 |
return -1; |
377 |
} |
378 |
break;
|
379 |
case TIFF_STRIP_SIZE:
|
380 |
if(count == 1){ |
381 |
s->stripsizes = NULL;
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382 |
s->stripsize = value; |
383 |
s->strips = 1;
|
384 |
}else{
|
385 |
s->stripsizes = start + off; |
386 |
} |
387 |
s->strips = count; |
388 |
s->sstype = type; |
389 |
if(s->stripsizes > end_buf){
|
390 |
av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
|
391 |
return -1; |
392 |
} |
393 |
break;
|
394 |
case TIFF_PREDICTOR:
|
395 |
s->predictor = value; |
396 |
break;
|
397 |
case TIFF_INVERT:
|
398 |
switch(value){
|
399 |
case 0: |
400 |
s->invert = 1;
|
401 |
break;
|
402 |
case 1: |
403 |
s->invert = 0;
|
404 |
break;
|
405 |
case 2: |
406 |
case 3: |
407 |
break;
|
408 |
default:
|
409 |
av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
|
410 |
return -1; |
411 |
} |
412 |
break;
|
413 |
case TIFF_FILL_ORDER:
|
414 |
if(value < 1 || value > 2){ |
415 |
av_log(s->avctx, AV_LOG_ERROR, "Unknown FillOrder value %d, trying default one\n", value);
|
416 |
value = 1;
|
417 |
} |
418 |
s->fill_order = value - 1;
|
419 |
break;
|
420 |
case TIFF_PAL:
|
421 |
if(s->avctx->pix_fmt != PIX_FMT_PAL8){
|
422 |
av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
|
423 |
return -1; |
424 |
} |
425 |
pal = (uint32_t *) s->picture.data[1];
|
426 |
off = type_sizes[type]; |
427 |
rp = buf; |
428 |
gp = buf + count / 3 * off;
|
429 |
bp = buf + count / 3 * off * 2; |
430 |
off = (type_sizes[type] - 1) << 3; |
431 |
for(i = 0; i < count / 3; i++){ |
432 |
j = (tget(&rp, type, s->le) >> off) << 16;
|
433 |
j |= (tget(&gp, type, s->le) >> off) << 8;
|
434 |
j |= tget(&bp, type, s->le) >> off; |
435 |
pal[i] = j; |
436 |
} |
437 |
break;
|
438 |
case TIFF_PLANAR:
|
439 |
if(value == 2){ |
440 |
av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
|
441 |
return -1; |
442 |
} |
443 |
break;
|
444 |
case TIFF_T4OPTIONS:
|
445 |
if(s->compr == TIFF_G3)
|
446 |
s->fax_opts = value; |
447 |
break;
|
448 |
case TIFF_T6OPTIONS:
|
449 |
if(s->compr == TIFF_G4)
|
450 |
s->fax_opts = value; |
451 |
break;
|
452 |
} |
453 |
return 0; |
454 |
} |
455 |
|
456 |
static int decode_frame(AVCodecContext *avctx, |
457 |
void *data, int *data_size, |
458 |
AVPacket *avpkt) |
459 |
{ |
460 |
const uint8_t *buf = avpkt->data;
|
461 |
int buf_size = avpkt->size;
|
462 |
TiffContext * const s = avctx->priv_data;
|
463 |
AVFrame *picture = data; |
464 |
AVFrame * const p= (AVFrame*)&s->picture;
|
465 |
const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
|
466 |
int id, le, off;
|
467 |
int i, j, entries;
|
468 |
int stride, soff, ssize;
|
469 |
uint8_t *dst; |
470 |
|
471 |
//parse image header
|
472 |
id = AV_RL16(buf); buf += 2;
|
473 |
if(id == 0x4949) le = 1; |
474 |
else if(id == 0x4D4D) le = 0; |
475 |
else{
|
476 |
av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
|
477 |
return -1; |
478 |
} |
479 |
s->le = le; |
480 |
s->invert = 0;
|
481 |
s->compr = TIFF_RAW; |
482 |
s->fill_order = 0;
|
483 |
// As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
|
484 |
// that further identifies the file as a TIFF file"
|
485 |
if(tget_short(&buf, le) != 42){ |
486 |
av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
|
487 |
return -1; |
488 |
} |
489 |
/* parse image file directory */
|
490 |
off = tget_long(&buf, le); |
491 |
if(orig_buf + off + 14 >= end_buf){ |
492 |
av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
|
493 |
return -1; |
494 |
} |
495 |
buf = orig_buf + off; |
496 |
entries = tget_short(&buf, le); |
497 |
for(i = 0; i < entries; i++){ |
498 |
if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0) |
499 |
return -1; |
500 |
buf += 12;
|
501 |
} |
502 |
if(!s->stripdata && !s->stripoff){
|
503 |
av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
|
504 |
return -1; |
505 |
} |
506 |
/* now we have the data and may start decoding */
|
507 |
if(!p->data[0]){ |
508 |
s->bpp = 1;
|
509 |
avctx->pix_fmt = PIX_FMT_MONOBLACK; |
510 |
if(s->width != s->avctx->width || s->height != s->avctx->height){
|
511 |
if(av_image_check_size(s->width, s->height, 0, s->avctx)) |
512 |
return -1; |
513 |
avcodec_set_dimensions(s->avctx, s->width, s->height); |
514 |
} |
515 |
if(s->picture.data[0]) |
516 |
s->avctx->release_buffer(s->avctx, &s->picture); |
517 |
if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){ |
518 |
av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
519 |
return -1; |
520 |
} |
521 |
} |
522 |
if(s->strips == 1 && !s->stripsize){ |
523 |
av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
|
524 |
s->stripsize = buf_size - s->stripoff; |
525 |
} |
526 |
stride = p->linesize[0];
|
527 |
dst = p->data[0];
|
528 |
for(i = 0; i < s->height; i += s->rps){ |
529 |
if(s->stripsizes)
|
530 |
ssize = tget(&s->stripsizes, s->sstype, s->le); |
531 |
else
|
532 |
ssize = s->stripsize; |
533 |
|
534 |
if (ssize > buf_size) {
|
535 |
av_log(avctx, AV_LOG_ERROR, "Buffer size is smaller than strip size\n");
|
536 |
return -1; |
537 |
} |
538 |
|
539 |
if(s->stripdata){
|
540 |
soff = tget(&s->stripdata, s->sot, s->le); |
541 |
}else
|
542 |
soff = s->stripoff; |
543 |
if (soff < 0) { |
544 |
av_log(avctx, AV_LOG_ERROR, "Invalid stripoff: %d\n", soff);
|
545 |
return AVERROR(EINVAL);
|
546 |
} |
547 |
if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0) |
548 |
break;
|
549 |
dst += s->rps * stride; |
550 |
} |
551 |
if(s->predictor == 2){ |
552 |
dst = p->data[0];
|
553 |
soff = s->bpp >> 3;
|
554 |
ssize = s->width * soff; |
555 |
for(i = 0; i < s->height; i++) { |
556 |
for(j = soff; j < ssize; j++)
|
557 |
dst[j] += dst[j - soff]; |
558 |
dst += stride; |
559 |
} |
560 |
} |
561 |
|
562 |
if(s->invert){
|
563 |
uint8_t *src; |
564 |
int j;
|
565 |
|
566 |
src = s->picture.data[0];
|
567 |
for(j = 0; j < s->height; j++){ |
568 |
for(i = 0; i < s->picture.linesize[0]; i++) |
569 |
src[i] = 255 - src[i];
|
570 |
src += s->picture.linesize[0];
|
571 |
} |
572 |
} |
573 |
*picture= *(AVFrame*)&s->picture; |
574 |
*data_size = sizeof(AVPicture);
|
575 |
|
576 |
return buf_size;
|
577 |
} |
578 |
|
579 |
static av_cold int tiff_init(AVCodecContext *avctx){ |
580 |
TiffContext *s = avctx->priv_data; |
581 |
|
582 |
s->width = 0;
|
583 |
s->height = 0;
|
584 |
s->avctx = avctx; |
585 |
avcodec_get_frame_defaults((AVFrame*)&s->picture); |
586 |
avctx->coded_frame= (AVFrame*)&s->picture; |
587 |
ff_lzw_decode_open(&s->lzw); |
588 |
ff_ccitt_unpack_init(); |
589 |
|
590 |
return 0; |
591 |
} |
592 |
|
593 |
static av_cold int tiff_end(AVCodecContext *avctx) |
594 |
{ |
595 |
TiffContext * const s = avctx->priv_data;
|
596 |
|
597 |
ff_lzw_decode_close(&s->lzw); |
598 |
if(s->picture.data[0]) |
599 |
avctx->release_buffer(avctx, &s->picture); |
600 |
return 0; |
601 |
} |
602 |
|
603 |
AVCodec ff_tiff_decoder = { |
604 |
"tiff",
|
605 |
AVMEDIA_TYPE_VIDEO, |
606 |
CODEC_ID_TIFF, |
607 |
sizeof(TiffContext),
|
608 |
tiff_init, |
609 |
NULL,
|
610 |
tiff_end, |
611 |
decode_frame, |
612 |
CODEC_CAP_DR1, |
613 |
NULL,
|
614 |
.long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
|
615 |
}; |