788 lines
24 KiB
C
788 lines
24 KiB
C
/*
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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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* @file
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* TIFF image decoder
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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 unsigned tget_short(const uint8_t **p, int le)
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{
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unsigned 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 unsigned tget_long(const uint8_t **p, int le)
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{
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unsigned 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 unsigned tget(const uint8_t **p, int type, int le)
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{
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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 UINT_MAX;
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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,
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int size)
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{
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z_stream zstream = { 0 };
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int zret;
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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 void av_always_inline horizontal_fill(unsigned int bpp, uint8_t* dst,
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int usePtr, const uint8_t *src,
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uint8_t c, int width, int offset)
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{
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switch (bpp) {
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case 1:
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while (--width >= 0) {
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dst[(width+offset)*8+7] = (usePtr ? src[width] : c) & 0x1;
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dst[(width+offset)*8+6] = (usePtr ? src[width] : c) >> 1 & 0x1;
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dst[(width+offset)*8+5] = (usePtr ? src[width] : c) >> 2 & 0x1;
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dst[(width+offset)*8+4] = (usePtr ? src[width] : c) >> 3 & 0x1;
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dst[(width+offset)*8+3] = (usePtr ? src[width] : c) >> 4 & 0x1;
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dst[(width+offset)*8+2] = (usePtr ? src[width] : c) >> 5 & 0x1;
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dst[(width+offset)*8+1] = (usePtr ? src[width] : c) >> 6 & 0x1;
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dst[(width+offset)*8+0] = (usePtr ? src[width] : c) >> 7;
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}
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break;
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case 2:
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while (--width >= 0) {
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dst[(width+offset)*4+3] = (usePtr ? src[width] : c) & 0x3;
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dst[(width+offset)*4+2] = (usePtr ? src[width] : c) >> 2 & 0x3;
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dst[(width+offset)*4+1] = (usePtr ? src[width] : c) >> 4 & 0x3;
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dst[(width+offset)*4+0] = (usePtr ? src[width] : c) >> 6;
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}
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break;
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case 4:
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while (--width >= 0) {
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dst[(width+offset)*2+1] = (usePtr ? src[width] : c) & 0xF;
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dst[(width+offset)*2+0] = (usePtr ? src[width] : c) >> 4;
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}
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break;
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default:
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if (usePtr) {
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memcpy(dst + offset, src, width);
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} else {
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memset(dst + offset, c, width);
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}
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}
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}
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static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
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const uint8_t *src, int size, int lines)
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{
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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) + 7) >> 3;
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if (size <= 0)
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return AVERROR_INVALIDDATA;
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#if CONFIG_ZLIB
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if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
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uint8_t *zbuf;
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unsigned long outlen;
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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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if (!zbuf)
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return AVERROR(ENOMEM);
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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,
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"Uncompressing failed (%lu of %lu) with error %d\n", outlen,
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(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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if(s->bpp < 8 && s->avctx->pix_fmt == PIX_FMT_PAL8){
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horizontal_fill(s->bpp, dst, 1, src, 0, width, 0);
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}else{
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memcpy(dst, src, width);
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}
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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
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|| s->compr == TIFF_G4) {
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int i, ret = 0;
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uint8_t *src2 = av_malloc((unsigned)size +
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FF_INPUT_BUFFER_PADDING_SIZE);
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if (!src2) {
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av_log(s->avctx, AV_LOG_ERROR,
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"Error allocating temporary buffer\n");
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return AVERROR(ENOMEM);
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}
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if (s->fax_opts & 2) {
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av_log(s->avctx, AV_LOG_ERROR,
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"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,
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s->compr, s->fax_opts);
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break;
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}
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if (s->bpp < 8 && s->avctx->pix_fmt == PIX_FMT_PAL8)
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for (line = 0; line < lines; line++) {
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horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
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dst += stride;
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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 (ssrc + size - src < width)
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return AVERROR_INVALIDDATA;
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if (!s->fill_order) {
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horizontal_fill(s->bpp * (s->avctx->pix_fmt == PIX_FMT_PAL8),
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dst, 1, src, 0, width, 0);
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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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if (ssrc + size - src < 2) {
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av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");
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return AVERROR_INVALIDDATA;
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}
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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,
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"Copy went out of bounds\n");
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return -1;
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}
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if (ssrc + size - src < code) {
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av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");
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return AVERROR_INVALIDDATA;
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}
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horizontal_fill(s->bpp * (s->avctx->pix_fmt == PIX_FMT_PAL8),
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dst, 1, src, 0, code, pixels);
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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,
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"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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horizontal_fill(s->bpp * (s->avctx->pix_fmt == PIX_FMT_PAL8),
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dst, 0, NULL, c, code, pixels);
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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",
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pixels, width);
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return -1;
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}
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if (s->bpp < 8 && s->avctx->pix_fmt == PIX_FMT_PAL8)
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horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
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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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if (!s->palette_is_set) {
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s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
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break;
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}
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case 21:
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case 41:
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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 = s->le ? PIX_FMT_GRAY16LE : PIX_FMT_GRAY16BE;
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break;
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case 162:
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s->avctx->pix_fmt = PIX_FMT_GRAY8A;
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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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case 644:
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s->avctx->pix_fmt = s->le ? PIX_FMT_RGBA64LE : PIX_FMT_RGBA64BE;
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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 < 1<<s->bpp; i++)
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pal[i] = 0xFF << 24 | i * 255 / ((1<<s->bpp) - 1) * 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,
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const uint8_t *buf, const uint8_t *end_buf)
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{
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unsigned 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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if (end_buf - buf < 12)
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return -1;
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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 (type == 0 || type >= FF_ARRAY_ELEMS(type_sizes)) {
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av_log(s->avctx, AV_LOG_DEBUG, "Unknown tiff type (%u) encountered\n",
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type);
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return 0;
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}
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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 = UINT_MAX;
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buf = start + off;
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}
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} else {
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if (count <= 4 && 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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}
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if (buf && (buf < start || buf > end_buf)) {
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av_log(s->avctx, AV_LOG_ERROR,
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"Tag referencing position outside the image\n");
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return -1;
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}
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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,
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"This format is not supported (bpp=%d, %d components)\n",
|
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s->bpp, count);
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return -1;
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}
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if (count == 1)
|
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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) +
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((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 && buf < end_buf; i++)
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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
|
|
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:
|
|
case TIFF_NEWJPEG:
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"JPEG compression is not supported\n");
|
|
return -1;
|
|
default:
|
|
av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n",
|
|
s->compr);
|
|
return -1;
|
|
}
|
|
break;
|
|
case TIFF_ROWSPERSTRIP:
|
|
if (type == TIFF_LONG && value == UINT_MAX)
|
|
value = s->avctx->height;
|
|
if (value < 1) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"Incorrect value of rows per strip\n");
|
|
return -1;
|
|
}
|
|
s->rps = value;
|
|
break;
|
|
case TIFF_STRIP_OFFS:
|
|
if (count == 1) {
|
|
s->stripdata = NULL;
|
|
s->stripoff = value;
|
|
} else
|
|
s->stripdata = start + off;
|
|
s->strips = count;
|
|
if (s->strips == 1)
|
|
s->rps = s->height;
|
|
s->sot = type;
|
|
if (s->stripdata > end_buf) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"Tag referencing position outside the image\n");
|
|
return -1;
|
|
}
|
|
break;
|
|
case TIFF_STRIP_SIZE:
|
|
if (count == 1) {
|
|
s->stripsizes = NULL;
|
|
s->stripsize = value;
|
|
s->strips = 1;
|
|
} else {
|
|
s->stripsizes = start + off;
|
|
}
|
|
s->strips = count;
|
|
s->sstype = type;
|
|
if (s->stripsizes > end_buf) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"Tag referencing position outside the image\n");
|
|
return -1;
|
|
}
|
|
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 -1;
|
|
}
|
|
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 || end_buf - buf < count / 3 * off * 3)
|
|
return -1;
|
|
rp = buf;
|
|
gp = buf + count / 3 * off;
|
|
bp = buf + count / 3 * off * 2;
|
|
off = (type_sizes[type] - 1) << 3;
|
|
for (i = 0; i < count / 3; i++) {
|
|
j = 0xff << 24;
|
|
j |= (tget(&rp, type, s->le) >> off) << 16;
|
|
j |= (tget(&gp, type, s->le) >> off) << 8;
|
|
j |= tget(&bp, type, s->le) >> off;
|
|
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 -1;
|
|
}
|
|
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;
|
|
default:
|
|
av_log(s->avctx, AV_LOG_DEBUG, "Unknown or unsupported tag %d/0X%0X\n",
|
|
tag, tag);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size, AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
TiffContext *const s = avctx->priv_data;
|
|
AVFrame *picture = data;
|
|
AVFrame *const p = &s->picture;
|
|
const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
|
|
unsigned off;
|
|
int id, le, ret;
|
|
int i, j, entries;
|
|
int stride;
|
|
unsigned soff, ssize;
|
|
uint8_t *dst;
|
|
|
|
//parse image header
|
|
if (end_buf - buf < 8)
|
|
return AVERROR_INVALIDDATA;
|
|
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;
|
|
}
|
|
// Reset these pointers so we can tell if they were set this frame
|
|
s->stripsizes = s->stripdata = NULL;
|
|
/* parse image file directory */
|
|
off = tget_long(&buf, le);
|
|
if (off >= UINT_MAX - 14 || end_buf - orig_buf < off + 14) {
|
|
av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
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) {
|
|
if (s->stripsizes >= end_buf)
|
|
return AVERROR_INVALIDDATA;
|
|
ssize = tget(&s->stripsizes, s->sstype, s->le);
|
|
} else
|
|
ssize = s->stripsize;
|
|
|
|
if (s->stripdata) {
|
|
if (s->stripdata >= end_buf)
|
|
return AVERROR_INVALIDDATA;
|
|
soff = tget(&s->stripdata, s->sot, s->le);
|
|
} else
|
|
soff = s->stripoff;
|
|
|
|
if (soff > buf_size || ssize > buf_size - soff) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");
|
|
return -1;
|
|
}
|
|
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;
|
|
if (s->avctx->pix_fmt == PIX_FMT_RGB48LE ||
|
|
s->avctx->pix_fmt == 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 == PIX_FMT_RGB48BE ||
|
|
s->avctx->pix_fmt == PIX_FMT_RGBA64BE) {
|
|
for (i = 0; i < s->height; i++) {
|
|
for (j = soff; j < ssize; j += 2)
|
|
AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));
|
|
dst += stride;
|
|
}
|
|
} else {
|
|
for (i = 0; i < s->height; i++) {
|
|
for (j = soff; j < ssize; j++)
|
|
dst[j] += dst[j - soff];
|
|
dst += stride;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (s->invert) {
|
|
dst = s->picture.data[0];
|
|
for (i = 0; i < s->height; i++) {
|
|
for (j = 0; j < s->picture.linesize[0]; j++)
|
|
dst[j] = (s->avctx->pix_fmt == PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];
|
|
dst += s->picture.linesize[0];
|
|
}
|
|
}
|
|
*picture = 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(&s->picture);
|
|
avctx->coded_frame = &s->picture;
|
|
ff_lzw_decode_open(&s->lzw);
|
|
ff_ccitt_unpack_init();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int tiff_end(AVCodecContext *avctx)
|
|
{
|
|
TiffContext *const s = avctx->priv_data;
|
|
|
|
ff_lzw_decode_close(&s->lzw);
|
|
if (s->picture.data[0])
|
|
avctx->release_buffer(avctx, &s->picture);
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_tiff_decoder = {
|
|
.name = "tiff",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = 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"),
|
|
};
|