742 lines
23 KiB
C
742 lines
23 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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* @file
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* TIFF image decoder
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* @author Konstantin Shishkov
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*/
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#include "config.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 "libavutil/attributes.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/imgutils.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "faxcompr.h"
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#include "internal.h"
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#include "lzw.h"
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#include "mathops.h"
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#include "tiff.h"
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typedef struct TiffContext {
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AVCodecContext *avctx;
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GetByteContext gb;
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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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enum TiffPhotometric photometric;
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int planar;
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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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int stripsizesoff, stripsize, stripoff, strippos;
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LZWState *lzw;
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} TiffContext;
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static unsigned tget_short(GetByteContext *gb, int le)
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{
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return le ? bytestream2_get_le16(gb) : bytestream2_get_be16(gb);
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}
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static unsigned tget_long(GetByteContext *gb, int le)
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{
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return le ? bytestream2_get_le32(gb) : bytestream2_get_be32(gb);
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}
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static unsigned tget(GetByteContext *gb, int type, int le)
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{
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switch (type) {
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case TIFF_BYTE: return bytestream2_get_byte(gb);
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case TIFF_SHORT: return tget_short(gb, le);
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case TIFF_LONG: return tget_long(gb, 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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static int tiff_unpack_zlib(TiffContext *s, uint8_t *dst, int stride,
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const uint8_t *src, int size,
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int width, int lines)
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{
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uint8_t *zbuf;
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unsigned long outlen;
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int ret, line;
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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 AVERROR_UNKNOWN;
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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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static int tiff_unpack_fax(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 i, ret = 0;
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uint8_t *src2 = av_malloc((unsigned)size +
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AV_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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avpriv_request_sample(s->avctx, "Uncompressed fax mode");
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av_free(src2);
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return AVERROR_PATCHWELCOME;
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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] = ff_reverse[src[i]];
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}
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memset(src2 + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
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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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av_free(src2);
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return ret;
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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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PutByteContext pb;
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int c, line, pixels, code, ret;
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int width = ((s->width * s->bpp) + 7) >> 3;
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if (s->planar)
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width /= s->bppcount;
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if (size <= 0)
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return AVERROR_INVALIDDATA;
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if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
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#if CONFIG_ZLIB
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return tiff_unpack_zlib(s, dst, stride, src, size, width, lines);
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#else
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av_log(s->avctx, AV_LOG_ERROR,
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"zlib support not enabled, "
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"deflate compression not supported\n");
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return AVERROR(ENOSYS);
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#endif
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}
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if (s->compr == TIFF_LZW) {
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if ((ret = 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 ret;
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}
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for (line = 0; line < lines; line++) {
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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 AVERROR_INVALIDDATA;
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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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if (s->compr == TIFF_CCITT_RLE ||
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s->compr == TIFF_G3 ||
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s->compr == TIFF_G4) {
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return tiff_unpack_fax(s, dst, stride, src, size, lines);
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}
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bytestream2_init(&s->gb, src, size);
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bytestream2_init_writer(&pb, dst, stride * lines);
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for (line = 0; line < lines; line++) {
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if (bytestream2_get_bytes_left(&s->gb) == 0 || bytestream2_get_eof(&pb))
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break;
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bytestream2_seek_p(&pb, stride * line, SEEK_SET);
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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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bytestream2_copy_buffer(&pb, &s->gb, 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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bytestream2_put_byte(&pb, ff_reverse[bytestream2_get_byte(&s->gb)]);
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}
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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 = ff_u8_to_s8(bytestream2_get_byte(&s->gb));
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if (code >= 0) {
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code++;
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bytestream2_copy_buffer(&pb, &s->gb, 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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c = bytestream2_get_byte(&s->gb);
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bytestream2_set_buffer(&pb, 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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}
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}
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return 0;
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}
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static int init_image(TiffContext *s, AVFrame *frame)
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{
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int ret;
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// make sure there is no aliasing in the following switch
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if (s->bpp >= 100 || s->bppcount >= 10) {
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av_log(s->avctx, AV_LOG_ERROR,
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"Unsupported image parameters: 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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switch (s->planar * 1000 + s->bpp * 10 + s->bppcount) {
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case 11:
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s->avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
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break;
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case 81:
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s->avctx->pix_fmt = s->palette_is_set ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8;
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break;
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case 243:
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s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
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break;
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case 161:
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s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GRAY16LE : AV_PIX_FMT_GRAY16BE;
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break;
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case 162:
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s->avctx->pix_fmt = AV_PIX_FMT_YA8;
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break;
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case 322:
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s->avctx->pix_fmt = s->le ? AV_PIX_FMT_YA16LE : AV_PIX_FMT_YA16BE;
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break;
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case 324:
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s->avctx->pix_fmt = AV_PIX_FMT_RGBA;
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break;
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case 483:
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s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGB48LE : AV_PIX_FMT_RGB48BE;
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break;
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case 644:
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s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGBA64LE : AV_PIX_FMT_RGBA64BE;
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break;
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case 1243:
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s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
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break;
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case 1324:
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s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
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break;
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case 1483:
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s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GBRP16LE : AV_PIX_FMT_GBRP16BE;
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break;
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case 1644:
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s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GBRAP16LE : AV_PIX_FMT_GBRAP16BE;
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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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ret = ff_set_dimensions(s->avctx, s->width, s->height);
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if (ret < 0)
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return ret;
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}
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if ((ret = ff_get_buffer(s->avctx, frame, 0)) < 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 == AV_PIX_FMT_PAL8) {
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memcpy(frame->data[1], s->palette, sizeof(s->palette));
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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)
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{
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unsigned tag, type, count, off, value = 0;
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int i, start;
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if (bytestream2_get_bytes_left(&s->gb) < 12)
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return AVERROR_INVALIDDATA;
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tag = tget_short(&s->gb, s->le);
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type = tget_short(&s->gb, s->le);
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count = tget_long(&s->gb, s->le);
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off = tget_long(&s->gb, s->le);
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start = bytestream2_tell(&s->gb);
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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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bytestream2_seek(&s->gb, -4, SEEK_CUR);
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value = tget(&s->gb, type, s->le);
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break;
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case TIFF_LONG:
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value = off;
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break;
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case TIFF_STRING:
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if (count <= 4) {
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bytestream2_seek(&s->gb, -4, SEEK_CUR);
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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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bytestream2_seek(&s->gb, off, SEEK_SET);
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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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bytestream2_seek(&s->gb, -4, SEEK_CUR);
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else
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bytestream2_seek(&s->gb, off, SEEK_SET);
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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 AVERROR_INVALIDDATA;
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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; i++)
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s->bpp += tget(&s->gb, 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 AVERROR(ENOSYS);
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#endif
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case TIFF_JPEG:
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case TIFF_NEWJPEG:
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avpriv_report_missing_feature(s->avctx, "JPEG compression");
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return AVERROR_PATCHWELCOME;
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case TIFF_LZMA:
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avpriv_report_missing_feature(s->avctx, "LZMA compression");
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return AVERROR_PATCHWELCOME;
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default:
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av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n",
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s->compr);
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return AVERROR_INVALIDDATA;
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}
|
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break;
|
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case TIFF_ROWSPERSTRIP:
|
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if (!value || (type == TIFF_LONG && value == UINT_MAX))
|
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value = s->height;
|
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s->rps = FFMIN(value, s->height);
|
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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->strippos = 0;
|
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s->stripoff = value;
|
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} else
|
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s->strippos = off;
|
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s->strips = count;
|
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if (s->strips == 1)
|
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s->rps = s->height;
|
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s->sot = type;
|
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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->stripsizesoff = 0;
|
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s->stripsize = value;
|
|
s->strips = 1;
|
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} else {
|
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s->stripsizesoff = off;
|
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}
|
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s->strips = count;
|
|
s->sstype = type;
|
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break;
|
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case TIFF_PREDICTOR:
|
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s->predictor = value;
|
|
break;
|
|
case TIFF_PHOTOMETRIC:
|
|
switch (value) {
|
|
case TIFF_PHOTOMETRIC_WHITE_IS_ZERO:
|
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case TIFF_PHOTOMETRIC_BLACK_IS_ZERO:
|
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case TIFF_PHOTOMETRIC_RGB:
|
|
case TIFF_PHOTOMETRIC_PALETTE:
|
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s->photometric = value;
|
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break;
|
|
case TIFF_PHOTOMETRIC_ALPHA_MASK:
|
|
case TIFF_PHOTOMETRIC_SEPARATED:
|
|
case TIFF_PHOTOMETRIC_YCBCR:
|
|
case TIFF_PHOTOMETRIC_CIE_LAB:
|
|
case TIFF_PHOTOMETRIC_ICC_LAB:
|
|
case TIFF_PHOTOMETRIC_ITU_LAB:
|
|
case TIFF_PHOTOMETRIC_CFA:
|
|
case TIFF_PHOTOMETRIC_LOG_L:
|
|
case TIFF_PHOTOMETRIC_LOG_LUV:
|
|
case TIFF_PHOTOMETRIC_LINEAR_RAW:
|
|
avpriv_report_missing_feature(s->avctx,
|
|
"PhotometricInterpretation 0x%04X",
|
|
value);
|
|
return AVERROR_PATCHWELCOME;
|
|
default:
|
|
av_log(s->avctx, AV_LOG_ERROR, "PhotometricInterpretation %u is "
|
|
"unknown\n", value);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
break;
|
|
case TIFF_FILL_ORDER:
|
|
if (value < 1 || value > 2) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"Unknown FillOrder value %d, trying default one\n", value);
|
|
value = 1;
|
|
}
|
|
s->fill_order = value - 1;
|
|
break;
|
|
case TIFF_PAL: {
|
|
GetByteContext pal_gb[3];
|
|
off = type_sizes[type];
|
|
if (count / 3 > 256 ||
|
|
bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)
|
|
return AVERROR_INVALIDDATA;
|
|
pal_gb[0] = pal_gb[1] = pal_gb[2] = s->gb;
|
|
bytestream2_skip(&pal_gb[1], count / 3 * off);
|
|
bytestream2_skip(&pal_gb[2], count / 3 * off * 2);
|
|
off = (type_sizes[type] - 1) << 3;
|
|
for (i = 0; i < count / 3; i++) {
|
|
uint32_t p = 0xFF000000;
|
|
p |= (tget(&pal_gb[0], type, s->le) >> off) << 16;
|
|
p |= (tget(&pal_gb[1], type, s->le) >> off) << 8;
|
|
p |= tget(&pal_gb[2], type, s->le) >> off;
|
|
s->palette[i] = p;
|
|
}
|
|
s->palette_is_set = 1;
|
|
break;
|
|
}
|
|
case TIFF_PLANAR:
|
|
s->planar = value == 2;
|
|
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:
|
|
if (s->avctx->err_recognition & AV_EF_EXPLODE) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"Unknown or unsupported tag %d/0X%0X\n",
|
|
tag, tag);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
bytestream2_seek(&s->gb, start, SEEK_SET);
|
|
return 0;
|
|
}
|
|
|
|
static int decode_frame(AVCodecContext *avctx,
|
|
void *data, int *got_frame, AVPacket *avpkt)
|
|
{
|
|
TiffContext *const s = avctx->priv_data;
|
|
AVFrame *const p = data;
|
|
unsigned off;
|
|
int id, le, ret, plane, planes;
|
|
int i, j, entries, stride;
|
|
unsigned soff, ssize;
|
|
uint8_t *dst;
|
|
GetByteContext stripsizes;
|
|
GetByteContext stripdata;
|
|
|
|
bytestream2_init(&s->gb, avpkt->data, avpkt->size);
|
|
|
|
// parse image header
|
|
if (avpkt->size < 8)
|
|
return AVERROR_INVALIDDATA;
|
|
id = bytestream2_get_le16(&s->gb);
|
|
if (id == 0x4949)
|
|
le = 1;
|
|
else if (id == 0x4D4D)
|
|
le = 0;
|
|
else {
|
|
av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
s->le = le;
|
|
s->photometric = TIFF_PHOTOMETRIC_NONE;
|
|
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(&s->gb, le) != 42) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"The answer to life, universe and everything is not correct!\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
// Reset these offsets so we can tell if they were set this frame
|
|
s->stripsizesoff = s->strippos = 0;
|
|
/* parse image file directory */
|
|
off = tget_long(&s->gb, le);
|
|
if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {
|
|
av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
bytestream2_seek(&s->gb, off, SEEK_SET);
|
|
entries = tget_short(&s->gb, le);
|
|
for (i = 0; i < entries; i++) {
|
|
if ((ret = tiff_decode_tag(s)) < 0)
|
|
return ret;
|
|
}
|
|
if (!s->strippos && !s->stripoff) {
|
|
av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
/* now we have the data and may start decoding */
|
|
if ((ret = init_image(s, p)) < 0)
|
|
return ret;
|
|
|
|
if (s->strips == 1 && !s->stripsize) {
|
|
av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
|
|
s->stripsize = avpkt->size - s->stripoff;
|
|
}
|
|
|
|
if (s->stripsizesoff) {
|
|
if (s->stripsizesoff >= avpkt->size)
|
|
return AVERROR_INVALIDDATA;
|
|
bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,
|
|
avpkt->size - s->stripsizesoff);
|
|
}
|
|
if (s->strippos) {
|
|
if (s->strippos >= avpkt->size)
|
|
return AVERROR_INVALIDDATA;
|
|
bytestream2_init(&stripdata, avpkt->data + s->strippos,
|
|
avpkt->size - s->strippos);
|
|
}
|
|
|
|
planes = s->planar ? s->bppcount : 1;
|
|
for (plane = 0; plane < planes; plane++) {
|
|
stride = p->linesize[plane];
|
|
dst = p->data[plane];
|
|
for (i = 0; i < s->height; i += s->rps) {
|
|
if (s->stripsizesoff)
|
|
ssize = tget(&stripsizes, s->sstype, le);
|
|
else
|
|
ssize = s->stripsize;
|
|
|
|
if (s->strippos)
|
|
soff = tget(&stripdata, s->sot, le);
|
|
else
|
|
soff = s->stripoff;
|
|
|
|
if (soff > avpkt->size || ssize > avpkt->size - soff) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if ((ret = tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize,
|
|
FFMIN(s->rps, s->height - i))) < 0) {
|
|
if (avctx->err_recognition & AV_EF_EXPLODE)
|
|
return ret;
|
|
break;
|
|
}
|
|
dst += s->rps * stride;
|
|
}
|
|
if (s->predictor == 2) {
|
|
dst = p->data[plane];
|
|
soff = s->bpp >> 3;
|
|
ssize = s->width * soff;
|
|
if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||
|
|
s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE) {
|
|
for (i = 0; i < s->height; i++) {
|
|
for (j = soff; j < ssize; j += 2)
|
|
AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));
|
|
dst += stride;
|
|
}
|
|
} else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||
|
|
s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {
|
|
for (i = 0; i < s->height; i++) {
|
|
for (j = soff; j < ssize; j += 2)
|
|
AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));
|
|
dst += stride;
|
|
}
|
|
} else {
|
|
for (i = 0; i < s->height; i++) {
|
|
for (j = soff; j < ssize; j++)
|
|
dst[j] += dst[j - soff];
|
|
dst += stride;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {
|
|
dst = p->data[plane];
|
|
for (i = 0; i < s->height; i++) {
|
|
for (j = 0; j < stride; j++)
|
|
dst[j] = 255 - dst[j];
|
|
dst += stride;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (s->planar && s->bppcount > 2) {
|
|
FFSWAP(uint8_t*, p->data[0], p->data[2]);
|
|
FFSWAP(int, p->linesize[0], p->linesize[2]);
|
|
FFSWAP(uint8_t*, p->data[0], p->data[1]);
|
|
FFSWAP(int, p->linesize[0], p->linesize[1]);
|
|
}
|
|
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
static av_cold int tiff_init(AVCodecContext *avctx)
|
|
{
|
|
TiffContext *s = avctx->priv_data;
|
|
|
|
s->width = 0;
|
|
s->height = 0;
|
|
s->avctx = avctx;
|
|
ff_lzw_decode_open(&s->lzw);
|
|
ff_ccitt_unpack_init();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int tiff_end(AVCodecContext *avctx)
|
|
{
|
|
TiffContext *const s = avctx->priv_data;
|
|
|
|
ff_lzw_decode_close(&s->lzw);
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_tiff_decoder = {
|
|
.name = "tiff",
|
|
.long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_TIFF,
|
|
.priv_data_size = sizeof(TiffContext),
|
|
.init = tiff_init,
|
|
.close = tiff_end,
|
|
.decode = decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
};
|