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* Copyright (c) 2006 Konstantin Shishkov
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* This file is part of FFmpeg.
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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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* 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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* 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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* @author Konstantin Shishkov
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typedef struct TiffContext {
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AVCodecContext *avctx;
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int stripsize, stripoff;
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static int tget_short(uint8_t **p, int le){
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int v = le ? AV_RL16(*p) : AV_RB16(*p);
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static int tget_long(uint8_t **p, int le){
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int v = le ? AV_RL32(*p) : AV_RB32(*p);
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static int tget(uint8_t **p, int type, int le){
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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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static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, uint8_t *src, int size, int lines){
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int c, line, pixels, code;
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int width = s->width * (s->bpp / 8);
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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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outlen = width * lines;
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zbuf = av_malloc(outlen);
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if(uncompress(zbuf, &outlen, src, size) != Z_OK){
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av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu)\n", outlen, (unsigned long)width * lines);
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for(line = 0; line < lines; line++){
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memcpy(dst, src, width);
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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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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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memcpy(dst, src, s->width * (s->bpp / 8));
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src += s->width * (s->bpp / 8);
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for(pixels = 0; pixels < width;){
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code = (int8_t)*src++;
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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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memcpy(dst + pixels, src, code);
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}else if(code != -128){ // -127..-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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memset(dst + pixels, c, code);
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pixels = ff_lzw_decode(s->lzw, dst, 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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static int tiff_decode_tag(TiffContext *s, uint8_t *start, uint8_t *buf, uint8_t *end_buf, AVFrame *pic)
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int tag, type, count, off, value = 0;
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int i, j, ssize, soff, stride;
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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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value = tget(&buf, type, s->le);
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}else if(type_sizes[type] * count <= 4){
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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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if(count == 1) s->bpp = value;
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s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
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for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
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s->avctx->pix_fmt = PIX_FMT_PAL8;
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s->avctx->pix_fmt = PIX_FMT_RGB24;
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s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
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av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%i)\n", s->bpp);
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av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%i)\n", s->bpp);
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if(s->width != s->avctx->width || s->height != s->avctx->height){
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if(avcodec_check_dimensions(s->avctx, s->width, s->height))
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avcodec_set_dimensions(s->avctx, s->width, s->height);
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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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/* 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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case TIFF_ADOBE_DEFLATE:
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av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
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av_log(s->avctx, AV_LOG_ERROR, "CCITT G3 compression is not supported\n");
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av_log(s->avctx, AV_LOG_ERROR, "CCITT G4 compression is not supported\n");
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av_log(s->avctx, AV_LOG_ERROR, "CCITT RLE compression is not supported\n");
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av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
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av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
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case TIFF_ROWSPERSTRIP:
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av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
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case TIFF_STRIP_OFFS:
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s->stripdata = start + off;
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if(s->strips == 1) s->rps = s->height;
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if(s->stripdata > end_buf){
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av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
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case TIFF_STRIP_SIZE:
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s->stripsizes = NULL;
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s->stripsize = value;
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s->stripsizes = start + off;
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if(s->stripsizes > end_buf){
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av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
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av_log(s->avctx, AV_LOG_ERROR, "Picture initialization missing\n");
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/* now we have the data and may start decoding */
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stride = pic->linesize[0];
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for(i = 0; i < s->height; i += s->rps){
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ssize = tget(&s->stripsizes, type, s->le);
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ssize = s->stripsize;
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soff = tget(&s->stripdata, s->sot, s->le);
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if(tiff_unpack_strip(s, dst, stride, src, ssize, FFMIN(s->rps, s->height - i)) < 0)
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dst += s->rps * stride;
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av_log(s->avctx, AV_LOG_ERROR, "Picture initialization missing\n");
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stride = pic->linesize[0];
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ssize = s->width * soff;
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for(i = 0; i < s->height; i++) {
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for(j = soff; j < ssize; j++)
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src[j] += src[j - soff];
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av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
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if(s->avctx->pix_fmt != PIX_FMT_PAL8){
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av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
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pal = (uint32_t *) s->picture.data[1];
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off = type_sizes[type];
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gp = buf + count / 3 * off;
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bp = buf + count / 3 * off * 2;
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off = (type_sizes[type] - 1) << 3;
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for(i = 0; i < count / 3; i++){
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j = (tget(&rp, type, s->le) >> off) << 16;
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j |= (tget(&gp, type, s->le) >> off) << 8;
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j |= tget(&bp, type, s->le) >> off;
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av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
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static int decode_frame(AVCodecContext *avctx,
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void *data, int *data_size,
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uint8_t *buf, int buf_size)
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TiffContext * const s = avctx->priv_data;
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AVFrame *picture = data;
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AVFrame * const p= (AVFrame*)&s->picture;
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uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
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id = AV_RL16(buf); buf += 2;
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if(id == 0x4949) le = 1;
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else if(id == 0x4D4D) le = 0;
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av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
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// As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
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// that further identifies the file as a TIFF file"
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if(tget_short(&buf, le) != 42){
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av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
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/* parse image file directory */
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off = tget_long(&buf, le);
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if(orig_buf + off + 14 >= end_buf){
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av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
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buf = orig_buf + off;
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entries = tget_short(&buf, le);
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for(i = 0; i < entries; i++){
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if(tiff_decode_tag(s, orig_buf, buf, end_buf, p) < 0)
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src = s->picture.data[0];
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for(j = 0; j < s->height; j++){
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for(i = 0; i < s->picture.linesize[0]; i++)
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src[i] = 255 - src[i];
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src += s->picture.linesize[0];
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*picture= *(AVFrame*)&s->picture;
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*data_size = sizeof(AVPicture);
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static int tiff_init(AVCodecContext *avctx){
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TiffContext *s = avctx->priv_data;
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avcodec_get_frame_defaults((AVFrame*)&s->picture);
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avctx->coded_frame= (AVFrame*)&s->picture;
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s->picture.data[0] = NULL;
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ff_lzw_decode_open(&s->lzw);
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static int tiff_end(AVCodecContext *avctx)
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TiffContext * const s = avctx->priv_data;
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ff_lzw_decode_close(&s->lzw);
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if(s->picture.data[0])
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avctx->release_buffer(avctx, &s->picture);
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AVCodec tiff_decoder = {