943616869ba1d9fdc33d2ad9323bd6b432410437
[libav.git] / libavcodec / tiff.c
1 /*
2 * TIFF image decoder
3 * Copyright (c) 2006 Konstantin Shishkov
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 /**
23 * TIFF image decoder
24 * @file tiff.c
25 * @author Konstantin Shishkov
26 */
27 #include "avcodec.h"
28 #ifdef CONFIG_ZLIB
29 #include <zlib.h>
30 #endif
31 #include "lzw.h"
32 #include "tiff.h"
33
34
35 typedef struct TiffContext {
36 AVCodecContext *avctx;
37 AVFrame picture;
38
39 int width, height;
40 unsigned int bpp;
41 int le;
42 int compr;
43 int invert;
44 int predictor;
45
46 int strips, rps, sstype;
47 int sot;
48 const uint8_t* stripdata;
49 const uint8_t* stripsizes;
50 int stripsize, stripoff;
51 LZWState *lzw;
52 } TiffContext;
53
54 static int tget_short(const uint8_t **p, int le){
55 int v = le ? AV_RL16(*p) : AV_RB16(*p);
56 *p += 2;
57 return v;
58 }
59
60 static int tget_long(const uint8_t **p, int le){
61 int v = le ? AV_RL32(*p) : AV_RB32(*p);
62 *p += 4;
63 return v;
64 }
65
66 static int tget(const uint8_t **p, int type, int le){
67 switch(type){
68 case TIFF_BYTE : return *(*p)++;
69 case TIFF_SHORT: return tget_short(p, le);
70 case TIFF_LONG : return tget_long (p, le);
71 default : return -1;
72 }
73 }
74
75 static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
76 int c, line, pixels, code;
77 const uint8_t *ssrc = src;
78 int width = s->width * s->bpp >> 3;
79 #ifdef CONFIG_ZLIB
80 uint8_t *zbuf; unsigned long outlen;
81
82 if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
83 outlen = width * lines;
84 zbuf = av_malloc(outlen);
85 if(uncompress(zbuf, &outlen, src, size) != Z_OK){
86 av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu)\n", outlen, (unsigned long)width * lines);
87 av_free(zbuf);
88 return -1;
89 }
90 src = zbuf;
91 for(line = 0; line < lines; line++){
92 memcpy(dst, src, width);
93 dst += stride;
94 src += width;
95 }
96 av_free(zbuf);
97 return 0;
98 }
99 #endif
100 if(s->compr == TIFF_LZW){
101 if(ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0){
102 av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
103 return -1;
104 }
105 }
106 for(line = 0; line < lines; line++){
107 if(src - ssrc > size){
108 av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
109 return -1;
110 }
111 switch(s->compr){
112 case TIFF_RAW:
113 memcpy(dst, src, width);
114 src += width;
115 break;
116 case TIFF_PACKBITS:
117 for(pixels = 0; pixels < width;){
118 code = (int8_t)*src++;
119 if(code >= 0){
120 code++;
121 if(pixels + code > width){
122 av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
123 return -1;
124 }
125 memcpy(dst + pixels, src, code);
126 src += code;
127 pixels += code;
128 }else if(code != -128){ // -127..-1
129 code = (-code) + 1;
130 if(pixels + code > width){
131 av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
132 return -1;
133 }
134 c = *src++;
135 memset(dst + pixels, c, code);
136 pixels += code;
137 }
138 }
139 break;
140 case TIFF_LZW:
141 pixels = ff_lzw_decode(s->lzw, dst, width);
142 if(pixels < width){
143 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
144 return -1;
145 }
146 break;
147 }
148 dst += stride;
149 }
150 return 0;
151 }
152
153
154 static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
155 {
156 int tag, type, count, off, value = 0;
157 int i, j;
158 uint32_t *pal;
159 const uint8_t *rp, *gp, *bp;
160
161 tag = tget_short(&buf, s->le);
162 type = tget_short(&buf, s->le);
163 count = tget_long(&buf, s->le);
164 off = tget_long(&buf, s->le);
165
166 if(count == 1){
167 switch(type){
168 case TIFF_BYTE:
169 case TIFF_SHORT:
170 buf -= 4;
171 value = tget(&buf, type, s->le);
172 buf = NULL;
173 break;
174 case TIFF_LONG:
175 value = off;
176 buf = NULL;
177 break;
178 case TIFF_STRING:
179 if(count <= 4){
180 buf -= 4;
181 break;
182 }
183 default:
184 value = -1;
185 buf = start + off;
186 }
187 }else if(type_sizes[type] * count <= 4){
188 buf -= 4;
189 }else{
190 buf = start + off;
191 }
192
193 if(buf && (buf < start || buf > end_buf)){
194 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
195 return -1;
196 }
197
198 switch(tag){
199 case TIFF_WIDTH:
200 s->width = value;
201 break;
202 case TIFF_HEIGHT:
203 s->height = value;
204 break;
205 case TIFF_BPP:
206 if(count == 1) s->bpp = value;
207 else{
208 switch(type){
209 case TIFF_BYTE:
210 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
211 break;
212 case TIFF_SHORT:
213 case TIFF_LONG:
214 s->bpp = 0;
215 for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
216 break;
217 default:
218 s->bpp = -1;
219 }
220 }
221 switch(s->bpp){
222 case 1:
223 s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
224 break;
225 case 8:
226 s->avctx->pix_fmt = PIX_FMT_PAL8;
227 break;
228 case 24:
229 s->avctx->pix_fmt = PIX_FMT_RGB24;
230 break;
231 case 16:
232 if(count == 1){
233 s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
234 }else{
235 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%i)\n", s->bpp);
236 return -1;
237 }
238 break;
239 default:
240 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%i)\n", s->bpp);
241 return -1;
242 }
243 if(s->width != s->avctx->width || s->height != s->avctx->height){
244 if(avcodec_check_dimensions(s->avctx, s->width, s->height))
245 return -1;
246 avcodec_set_dimensions(s->avctx, s->width, s->height);
247 }
248 if(s->picture.data[0])
249 s->avctx->release_buffer(s->avctx, &s->picture);
250 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
251 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
252 return -1;
253 }
254 if(s->bpp == 8){
255 /* make default grayscale pal */
256 pal = (uint32_t *) s->picture.data[1];
257 for(i = 0; i < 256; i++)
258 pal[i] = i * 0x010101;
259 }
260 break;
261 case TIFF_COMPR:
262 s->compr = value;
263 s->predictor = 0;
264 switch(s->compr){
265 case TIFF_RAW:
266 case TIFF_PACKBITS:
267 case TIFF_LZW:
268 break;
269 case TIFF_DEFLATE:
270 case TIFF_ADOBE_DEFLATE:
271 #ifdef CONFIG_ZLIB
272 break;
273 #else
274 av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
275 return -1;
276 #endif
277 case TIFF_G3:
278 av_log(s->avctx, AV_LOG_ERROR, "CCITT G3 compression is not supported\n");
279 return -1;
280 case TIFF_G4:
281 av_log(s->avctx, AV_LOG_ERROR, "CCITT G4 compression is not supported\n");
282 return -1;
283 case TIFF_CCITT_RLE:
284 av_log(s->avctx, AV_LOG_ERROR, "CCITT RLE compression is not supported\n");
285 return -1;
286 case TIFF_JPEG:
287 case TIFF_NEWJPEG:
288 av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
289 return -1;
290 default:
291 av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
292 return -1;
293 }
294 break;
295 case TIFF_ROWSPERSTRIP:
296 if(type == TIFF_LONG && value == -1)
297 value = s->avctx->height;
298 if(value < 1){
299 av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
300 return -1;
301 }
302 s->rps = value;
303 break;
304 case TIFF_STRIP_OFFS:
305 if(count == 1){
306 s->stripdata = NULL;
307 s->stripoff = value;
308 }else
309 s->stripdata = start + off;
310 s->strips = count;
311 if(s->strips == 1) s->rps = s->height;
312 s->sot = type;
313 if(s->stripdata > end_buf){
314 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
315 return -1;
316 }
317 break;
318 case TIFF_STRIP_SIZE:
319 if(count == 1){
320 s->stripsizes = NULL;
321 s->stripsize = value;
322 s->strips = 1;
323 }else{
324 s->stripsizes = start + off;
325 }
326 s->strips = count;
327 s->sstype = type;
328 if(s->stripsizes > end_buf){
329 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
330 return -1;
331 }
332 break;
333 case TIFF_PREDICTOR:
334 s->predictor = value;
335 break;
336 case TIFF_INVERT:
337 switch(value){
338 case 0:
339 s->invert = 1;
340 break;
341 case 1:
342 s->invert = 0;
343 break;
344 case 2:
345 case 3:
346 break;
347 default:
348 av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
349 return -1;
350 }
351 break;
352 case TIFF_PAL:
353 if(s->avctx->pix_fmt != PIX_FMT_PAL8){
354 av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
355 return -1;
356 }
357 pal = (uint32_t *) s->picture.data[1];
358 off = type_sizes[type];
359 rp = buf;
360 gp = buf + count / 3 * off;
361 bp = buf + count / 3 * off * 2;
362 off = (type_sizes[type] - 1) << 3;
363 for(i = 0; i < count / 3; i++){
364 j = (tget(&rp, type, s->le) >> off) << 16;
365 j |= (tget(&gp, type, s->le) >> off) << 8;
366 j |= tget(&bp, type, s->le) >> off;
367 pal[i] = j;
368 }
369 break;
370 case TIFF_PLANAR:
371 if(value == 2){
372 av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
373 return -1;
374 }
375 break;
376 }
377 return 0;
378 }
379
380 static int decode_frame(AVCodecContext *avctx,
381 void *data, int *data_size,
382 const uint8_t *buf, int buf_size)
383 {
384 TiffContext * const s = avctx->priv_data;
385 AVFrame *picture = data;
386 AVFrame * const p= (AVFrame*)&s->picture;
387 const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
388 int id, le, off;
389 int i, j, entries;
390 int stride, soff, ssize;
391 uint8_t *dst;
392
393 //parse image header
394 id = AV_RL16(buf); buf += 2;
395 if(id == 0x4949) le = 1;
396 else if(id == 0x4D4D) le = 0;
397 else{
398 av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
399 return -1;
400 }
401 s->le = le;
402 s->invert = 0;
403 s->compr = TIFF_RAW;
404 // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
405 // that further identifies the file as a TIFF file"
406 if(tget_short(&buf, le) != 42){
407 av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
408 return -1;
409 }
410 /* parse image file directory */
411 off = tget_long(&buf, le);
412 if(orig_buf + off + 14 >= end_buf){
413 av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
414 return -1;
415 }
416 buf = orig_buf + off;
417 entries = tget_short(&buf, le);
418 for(i = 0; i < entries; i++){
419 if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
420 return -1;
421 buf += 12;
422 }
423 if(!s->stripdata && !s->stripoff){
424 av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
425 return -1;
426 }
427 /* now we have the data and may start decoding */
428 if(!p->data[0]){
429 av_log(s->avctx, AV_LOG_ERROR, "Picture initialization missing\n");
430 return -1;
431 }
432 if(s->strips == 1 && !s->stripsize){
433 av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
434 s->stripsize = buf_size - s->stripoff;
435 }
436 stride = p->linesize[0];
437 dst = p->data[0];
438 for(i = 0; i < s->height; i += s->rps){
439 if(s->stripsizes)
440 ssize = tget(&s->stripsizes, s->sstype, s->le);
441 else
442 ssize = s->stripsize;
443
444 if(s->stripdata){
445 soff = tget(&s->stripdata, s->sot, s->le);
446 }else
447 soff = s->stripoff;
448 if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
449 break;
450 dst += s->rps * stride;
451 }
452 if(s->predictor == 2){
453 dst = p->data[0];
454 soff = s->bpp >> 3;
455 ssize = s->width * soff;
456 for(i = 0; i < s->height; i++) {
457 for(j = soff; j < ssize; j++)
458 dst[j] += dst[j - soff];
459 dst += stride;
460 }
461 }
462
463 if(s->invert){
464 uint8_t *src;
465 int j;
466
467 src = s->picture.data[0];
468 for(j = 0; j < s->height; j++){
469 for(i = 0; i < s->picture.linesize[0]; i++)
470 src[i] = 255 - src[i];
471 src += s->picture.linesize[0];
472 }
473 }
474 *picture= *(AVFrame*)&s->picture;
475 *data_size = sizeof(AVPicture);
476
477 return buf_size;
478 }
479
480 static av_cold int tiff_init(AVCodecContext *avctx){
481 TiffContext *s = avctx->priv_data;
482
483 s->width = 0;
484 s->height = 0;
485 s->avctx = avctx;
486 avcodec_get_frame_defaults((AVFrame*)&s->picture);
487 avctx->coded_frame= (AVFrame*)&s->picture;
488 s->picture.data[0] = NULL;
489 ff_lzw_decode_open(&s->lzw);
490
491 return 0;
492 }
493
494 static av_cold int tiff_end(AVCodecContext *avctx)
495 {
496 TiffContext * const s = avctx->priv_data;
497
498 ff_lzw_decode_close(&s->lzw);
499 if(s->picture.data[0])
500 avctx->release_buffer(avctx, &s->picture);
501 return 0;
502 }
503
504 AVCodec tiff_decoder = {
505 "tiff",
506 CODEC_TYPE_VIDEO,
507 CODEC_ID_TIFF,
508 sizeof(TiffContext),
509 tiff_init,
510 NULL,
511 tiff_end,
512 decode_frame,
513 0,
514 NULL,
515 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
516 };