3 * Copyright (c) 2006 Konstantin Shishkov
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * @author Konstantin Shishkov
35 typedef struct TiffContext {
36 AVCodecContext *avctx;
47 const uint8_t* stripdata;
48 const uint8_t* stripsizes;
49 int stripsize, stripoff;
53 static int tget_short(const uint8_t **p, int le){
54 int v = le ? AV_RL16(*p) : AV_RB16(*p);
59 static int tget_long(const uint8_t **p, int le){
60 int v = le ? AV_RL32(*p) : AV_RB32(*p);
65 static int tget(const uint8_t **p, int type, int le){
67 case TIFF_BYTE : return *(*p)++;
68 case TIFF_SHORT: return tget_short(p, le);
69 case TIFF_LONG : return tget_long (p, le);
74 static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
75 int c, line, pixels, code;
76 const uint8_t *ssrc = src;
77 int width = s->width * s->bpp >> 3;
79 uint8_t *zbuf; unsigned long outlen;
81 if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
82 outlen = width * lines;
83 zbuf = av_malloc(outlen);
84 if(uncompress(zbuf, &outlen, src, size) != Z_OK){
85 av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu)\n", outlen, (unsigned long)width * lines);
90 for(line = 0; line < lines; line++){
91 memcpy(dst, src, width);
99 if(s->compr == TIFF_LZW){
100 if(ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0){
101 av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
105 for(line = 0; line < lines; line++){
106 if(src - ssrc > size){
107 av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
112 memcpy(dst, src, width);
116 for(pixels = 0; pixels < width;){
117 code = (int8_t)*src++;
120 if(pixels + code > width){
121 av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
124 memcpy(dst + pixels, src, code);
127 }else if(code != -128){ // -127..-1
129 if(pixels + code > width){
130 av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
134 memset(dst + pixels, c, code);
140 pixels = ff_lzw_decode(s->lzw, dst, width);
142 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
153 static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf, AVFrame *pic)
155 int tag, type, count, off, value = 0;
158 int i, j, ssize, soff, stride;
160 const uint8_t *rp, *gp, *bp;
162 tag = tget_short(&buf, s->le);
163 type = tget_short(&buf, s->le);
164 count = tget_long(&buf, s->le);
165 off = tget_long(&buf, s->le);
172 value = tget(&buf, type, s->le);
188 }else if(type_sizes[type] * count <= 4){
194 if(buf && (buf < start || buf > end_buf)){
195 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
207 if(count == 1) s->bpp = value;
211 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
216 for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
224 s->avctx->pix_fmt = PIX_FMT_PAL8;
227 s->avctx->pix_fmt = PIX_FMT_RGB24;
231 s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
233 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%i)\n", s->bpp);
238 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%i)\n", s->bpp);
241 if(s->width != s->avctx->width || s->height != s->avctx->height){
242 if(avcodec_check_dimensions(s->avctx, s->width, s->height))
244 avcodec_set_dimensions(s->avctx, s->width, s->height);
246 if(s->picture.data[0])
247 s->avctx->release_buffer(s->avctx, &s->picture);
248 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
249 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
253 /* make default grayscale pal */
254 pal = (uint32_t *) s->picture.data[1];
255 for(i = 0; i < 256; i++)
256 pal[i] = i * 0x010101;
267 case TIFF_ADOBE_DEFLATE:
271 av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
275 av_log(s->avctx, AV_LOG_ERROR, "CCITT G3 compression is not supported\n");
278 av_log(s->avctx, AV_LOG_ERROR, "CCITT G4 compression is not supported\n");
281 av_log(s->avctx, AV_LOG_ERROR, "CCITT RLE compression is not supported\n");
285 av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
288 av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
292 case TIFF_ROWSPERSTRIP:
294 av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
299 case TIFF_STRIP_OFFS:
304 s->stripdata = start + off;
306 if(s->strips == 1) s->rps = s->height;
308 if(s->stripdata > end_buf){
309 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
313 case TIFF_STRIP_SIZE:
315 s->stripsizes = NULL;
316 s->stripsize = value;
319 s->stripsizes = start + off;
322 if(s->stripsizes > end_buf){
323 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
327 av_log(s->avctx, AV_LOG_ERROR, "Picture initialization missing\n");
330 /* now we have the data and may start decoding */
331 stride = pic->linesize[0];
333 for(i = 0; i < s->height; i += s->rps){
335 ssize = tget(&s->stripsizes, type, s->le);
337 ssize = s->stripsize;
340 soff = tget(&s->stripdata, s->sot, s->le);
344 if(tiff_unpack_strip(s, dst, stride, src, ssize, FFMIN(s->rps, s->height - i)) < 0)
346 dst += s->rps * stride;
351 av_log(s->avctx, AV_LOG_ERROR, "Picture initialization missing\n");
356 stride = pic->linesize[0];
358 ssize = s->width * soff;
359 for(i = 0; i < s->height; i++) {
360 for(j = soff; j < ssize; j++)
361 dst[j] += dst[j - soff];
378 av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
383 if(s->avctx->pix_fmt != PIX_FMT_PAL8){
384 av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
387 pal = (uint32_t *) s->picture.data[1];
388 off = type_sizes[type];
390 gp = buf + count / 3 * off;
391 bp = buf + count / 3 * off * 2;
392 off = (type_sizes[type] - 1) << 3;
393 for(i = 0; i < count / 3; i++){
394 j = (tget(&rp, type, s->le) >> off) << 16;
395 j |= (tget(&gp, type, s->le) >> off) << 8;
396 j |= tget(&bp, type, s->le) >> off;
402 av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
410 static int decode_frame(AVCodecContext *avctx,
411 void *data, int *data_size,
412 const uint8_t *buf, int buf_size)
414 TiffContext * const s = avctx->priv_data;
415 AVFrame *picture = data;
416 AVFrame * const p= (AVFrame*)&s->picture;
417 const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
422 id = AV_RL16(buf); buf += 2;
423 if(id == 0x4949) le = 1;
424 else if(id == 0x4D4D) le = 0;
426 av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
432 // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
433 // that further identifies the file as a TIFF file"
434 if(tget_short(&buf, le) != 42){
435 av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
438 /* parse image file directory */
439 off = tget_long(&buf, le);
440 if(orig_buf + off + 14 >= end_buf){
441 av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
444 buf = orig_buf + off;
445 entries = tget_short(&buf, le);
446 for(i = 0; i < entries; i++){
447 if(tiff_decode_tag(s, orig_buf, buf, end_buf, p) < 0)
456 src = s->picture.data[0];
457 for(j = 0; j < s->height; j++){
458 for(i = 0; i < s->picture.linesize[0]; i++)
459 src[i] = 255 - src[i];
460 src += s->picture.linesize[0];
463 *picture= *(AVFrame*)&s->picture;
464 *data_size = sizeof(AVPicture);
469 static av_cold int tiff_init(AVCodecContext *avctx){
470 TiffContext *s = avctx->priv_data;
475 avcodec_get_frame_defaults((AVFrame*)&s->picture);
476 avctx->coded_frame= (AVFrame*)&s->picture;
477 s->picture.data[0] = NULL;
478 ff_lzw_decode_open(&s->lzw);
483 static av_cold int tiff_end(AVCodecContext *avctx)
485 TiffContext * const s = avctx->priv_data;
487 ff_lzw_decode_close(&s->lzw);
488 if(s->picture.data[0])
489 avctx->release_buffer(avctx, &s->picture);
493 AVCodec tiff_decoder = {
504 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),