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1
/*
2
 * TIFF image decoder
3
 * Copyright (c) 2006 Konstantin Shishkov
4
 *
5
 * This file is part of Libav.
6
 *
7
 * Libav 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
 * Libav 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
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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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 */
21

    
22
/**
23
 * TIFF image decoder
24
 * @file
25
 * @author Konstantin Shishkov
26
 */
27
#include "avcodec.h"
28
#if CONFIG_ZLIB
29
#include <zlib.h>
30
#endif
31
#include "lzw.h"
32
#include "tiff.h"
33
#include "faxcompr.h"
34
#include "libavutil/common.h"
35
#include "libavutil/intreadwrite.h"
36
#include "libavutil/imgutils.h"
37

    
38
typedef struct TiffContext {
39
    AVCodecContext *avctx;
40
    AVFrame picture;
41

    
42
    int width, height;
43
    unsigned int bpp, bppcount;
44
    int le;
45
    enum TiffCompr compr;
46
    int invert;
47
    int fax_opts;
48
    int predictor;
49
    int fill_order;
50

    
51
    int strips, rps, sstype;
52
    int sot;
53
    const uint8_t* stripdata;
54
    const uint8_t* stripsizes;
55
    int stripsize, stripoff;
56
    LZWState *lzw;
57
} TiffContext;
58

    
59
static int tget_short(const uint8_t **p, int le){
60
    int v = le ? AV_RL16(*p) : AV_RB16(*p);
61
    *p += 2;
62
    return v;
63
}
64

    
65
static int tget_long(const uint8_t **p, int le){
66
    int v = le ? AV_RL32(*p) : AV_RB32(*p);
67
    *p += 4;
68
    return v;
69
}
70

    
71
static int tget(const uint8_t **p, int type, int le){
72
    switch(type){
73
    case TIFF_BYTE : return *(*p)++;
74
    case TIFF_SHORT: return tget_short(p, le);
75
    case TIFF_LONG : return tget_long (p, le);
76
    default        : return -1;
77
    }
78
}
79

    
80
#if CONFIG_ZLIB
81
static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
82
{
83
    z_stream zstream;
84
    int zret;
85

    
86
    memset(&zstream, 0, sizeof(zstream));
87
    zstream.next_in = src;
88
    zstream.avail_in = size;
89
    zstream.next_out = dst;
90
    zstream.avail_out = *len;
91
    zret = inflateInit(&zstream);
92
    if (zret != Z_OK) {
93
        av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
94
        return zret;
95
    }
96
    zret = inflate(&zstream, Z_SYNC_FLUSH);
97
    inflateEnd(&zstream);
98
    *len = zstream.total_out;
99
    return zret == Z_STREAM_END ? Z_OK : zret;
100
}
101
#endif
102

    
103
static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
104
    int c, line, pixels, code;
105
    const uint8_t *ssrc = src;
106
    int width = s->width * s->bpp >> 3;
107
#if CONFIG_ZLIB
108
    uint8_t *zbuf; unsigned long outlen;
109

    
110
    if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
111
        int ret;
112
        outlen = width * lines;
113
        zbuf = av_malloc(outlen);
114
        ret = tiff_uncompress(zbuf, &outlen, src, size);
115
        if(ret != Z_OK){
116
            av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu) with error %d\n", outlen, (unsigned long)width * lines, ret);
117
            av_free(zbuf);
118
            return -1;
119
        }
120
        src = zbuf;
121
        for(line = 0; line < lines; line++){
122
            memcpy(dst, src, width);
123
            dst += stride;
124
            src += width;
125
        }
126
        av_free(zbuf);
127
        return 0;
128
    }
129
#endif
130
    if(s->compr == TIFF_LZW){
131
        if(ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0){
132
            av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
133
            return -1;
134
        }
135
    }
136
    if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
137
        int i, ret = 0;
138
        uint8_t *src2 = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
139

    
140
        if(!src2 || (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE < (unsigned)size){
141
            av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
142
            return -1;
143
        }
144
        if(s->fax_opts & 2){
145
            av_log(s->avctx, AV_LOG_ERROR, "Uncompressed fax mode is not supported (yet)\n");
146
            av_free(src2);
147
            return -1;
148
        }
149
        if(!s->fill_order){
150
            memcpy(src2, src, size);
151
        }else{
152
            for(i = 0; i < size; i++)
153
                src2[i] = av_reverse[src[i]];
154
        }
155
        memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
156
        switch(s->compr){
157
        case TIFF_CCITT_RLE:
158
        case TIFF_G3:
159
        case TIFF_G4:
160
            ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr, s->fax_opts);
161
            break;
162
        }
163
        av_free(src2);
164
        return ret;
165
    }
166
    for(line = 0; line < lines; line++){
167
        if(src - ssrc > size){
168
            av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
169
            return -1;
170
        }
171
        switch(s->compr){
172
        case TIFF_RAW:
173
            if (!s->fill_order) {
174
                memcpy(dst, src, width);
175
            } else {
176
                int i;
177
                for (i = 0; i < width; i++)
178
                    dst[i] = av_reverse[src[i]];
179
            }
180
            src += width;
181
            break;
182
        case TIFF_PACKBITS:
183
            for(pixels = 0; pixels < width;){
184
                code = (int8_t)*src++;
185
                if(code >= 0){
186
                    code++;
187
                    if(pixels + code > width){
188
                        av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
189
                        return -1;
190
                    }
191
                    memcpy(dst + pixels, src, code);
192
                    src += code;
193
                    pixels += code;
194
                }else if(code != -128){ // -127..-1
195
                    code = (-code) + 1;
196
                    if(pixels + code > width){
197
                        av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
198
                        return -1;
199
                    }
200
                    c = *src++;
201
                    memset(dst + pixels, c, code);
202
                    pixels += code;
203
                }
204
            }
205
            break;
206
        case TIFF_LZW:
207
            pixels = ff_lzw_decode(s->lzw, dst, width);
208
            if(pixels < width){
209
                av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
210
                return -1;
211
            }
212
            break;
213
        }
214
        dst += stride;
215
    }
216
    return 0;
217
}
218

    
219
static int init_image(TiffContext *s)
220
{
221
    int i, ret;
222
    uint32_t *pal;
223

    
224
    switch (s->bpp * 10 + s->bppcount) {
225
    case 11:
226
        s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
227
        break;
228
    case 81:
229
        s->avctx->pix_fmt = PIX_FMT_PAL8;
230
        break;
231
    case 243:
232
        s->avctx->pix_fmt = PIX_FMT_RGB24;
233
        break;
234
    case 161:
235
        s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
236
        break;
237
    case 324:
238
        s->avctx->pix_fmt = PIX_FMT_RGBA;
239
        break;
240
    case 483:
241
        s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
242
        break;
243
    default:
244
        av_log(s->avctx, AV_LOG_ERROR,
245
               "This format is not supported (bpp=%d, bppcount=%d)\n",
246
               s->bpp, s->bppcount);
247
        return AVERROR_INVALIDDATA;
248
    }
249
    if (s->width != s->avctx->width || s->height != s->avctx->height) {
250
        if ((ret = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
251
            return ret;
252
        avcodec_set_dimensions(s->avctx, s->width, s->height);
253
    }
254
    if (s->picture.data[0])
255
        s->avctx->release_buffer(s->avctx, &s->picture);
256
    if ((ret = s->avctx->get_buffer(s->avctx, &s->picture)) < 0) {
257
        av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
258
        return ret;
259
    }
260
    if (s->bpp == 8 && s->picture.data[1]){
261
        /* make default grayscale pal */
262
        pal = (uint32_t *) s->picture.data[1];
263
        for (i = 0; i < 256; i++)
264
            pal[i] = i * 0x010101;
265
    }
266
    return 0;
267
}
268

    
269
static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
270
{
271
    int tag, type, count, off, value = 0;
272
    int i, j;
273
    uint32_t *pal;
274
    const uint8_t *rp, *gp, *bp;
275

    
276
    tag = tget_short(&buf, s->le);
277
    type = tget_short(&buf, s->le);
278
    count = tget_long(&buf, s->le);
279
    off = tget_long(&buf, s->le);
280

    
281
    if(count == 1){
282
        switch(type){
283
        case TIFF_BYTE:
284
        case TIFF_SHORT:
285
            buf -= 4;
286
            value = tget(&buf, type, s->le);
287
            buf = NULL;
288
            break;
289
        case TIFF_LONG:
290
            value = off;
291
            buf = NULL;
292
            break;
293
        case TIFF_STRING:
294
            if(count <= 4){
295
                buf -= 4;
296
                break;
297
            }
298
        default:
299
            value = -1;
300
            buf = start + off;
301
        }
302
    }else if(type_sizes[type] * count <= 4){
303
        buf -= 4;
304
    }else{
305
        buf = start + off;
306
    }
307

    
308
    if(buf && (buf < start || buf > end_buf)){
309
        av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
310
        return -1;
311
    }
312

    
313
    switch(tag){
314
    case TIFF_WIDTH:
315
        s->width = value;
316
        break;
317
    case TIFF_HEIGHT:
318
        s->height = value;
319
        break;
320
    case TIFF_BPP:
321
        s->bppcount = count;
322
        if(count > 4){
323
            av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
324
            return -1;
325
        }
326
        if(count == 1) s->bpp = value;
327
        else{
328
            switch(type){
329
            case TIFF_BYTE:
330
                s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
331
                break;
332
            case TIFF_SHORT:
333
            case TIFF_LONG:
334
                s->bpp = 0;
335
                for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
336
                break;
337
            default:
338
                s->bpp = -1;
339
            }
340
        }
341
        break;
342
    case TIFF_SAMPLES_PER_PIXEL:
343
        if (count != 1) {
344
            av_log(s->avctx, AV_LOG_ERROR,
345
                   "Samples per pixel requires a single value, many provided\n");
346
            return AVERROR_INVALIDDATA;
347
        }
348
        if (s->bppcount == 1)
349
            s->bpp *= value;
350
        s->bppcount = value;
351
        break;
352
    case TIFF_COMPR:
353
        s->compr = value;
354
        s->predictor = 0;
355
        switch(s->compr){
356
        case TIFF_RAW:
357
        case TIFF_PACKBITS:
358
        case TIFF_LZW:
359
        case TIFF_CCITT_RLE:
360
            break;
361
        case TIFF_G3:
362
        case TIFF_G4:
363
            s->fax_opts = 0;
364
            break;
365
        case TIFF_DEFLATE:
366
        case TIFF_ADOBE_DEFLATE:
367
#if CONFIG_ZLIB
368
            break;
369
#else
370
            av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
371
            return -1;
372
#endif
373
        case TIFF_JPEG:
374
        case TIFF_NEWJPEG:
375
            av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
376
            return -1;
377
        default:
378
            av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
379
            return -1;
380
        }
381
        break;
382
    case TIFF_ROWSPERSTRIP:
383
        if(type == TIFF_LONG && value == -1)
384
            value = s->avctx->height;
385
        if(value < 1){
386
            av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
387
            return -1;
388
        }
389
        s->rps = value;
390
        break;
391
    case TIFF_STRIP_OFFS:
392
        if(count == 1){
393
            s->stripdata = NULL;
394
            s->stripoff = value;
395
        }else
396
            s->stripdata = start + off;
397
        s->strips = count;
398
        if(s->strips == 1) s->rps = s->height;
399
        s->sot = type;
400
        if(s->stripdata > end_buf){
401
            av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
402
            return -1;
403
        }
404
        break;
405
    case TIFF_STRIP_SIZE:
406
        if(count == 1){
407
            s->stripsizes = NULL;
408
            s->stripsize = value;
409
            s->strips = 1;
410
        }else{
411
            s->stripsizes = start + off;
412
        }
413
        s->strips = count;
414
        s->sstype = type;
415
        if(s->stripsizes > end_buf){
416
            av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
417
            return -1;
418
        }
419
        break;
420
    case TIFF_PREDICTOR:
421
        s->predictor = value;
422
        break;
423
    case TIFF_INVERT:
424
        switch(value){
425
        case 0:
426
            s->invert = 1;
427
            break;
428
        case 1:
429
            s->invert = 0;
430
            break;
431
        case 2:
432
        case 3:
433
            break;
434
        default:
435
            av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
436
            return -1;
437
        }
438
        break;
439
    case TIFF_FILL_ORDER:
440
        if(value < 1 || value > 2){
441
            av_log(s->avctx, AV_LOG_ERROR, "Unknown FillOrder value %d, trying default one\n", value);
442
            value = 1;
443
        }
444
        s->fill_order = value - 1;
445
        break;
446
    case TIFF_PAL:
447
        if(s->avctx->pix_fmt != PIX_FMT_PAL8){
448
            av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
449
            return -1;
450
        }
451
        pal = (uint32_t *) s->picture.data[1];
452
        off = type_sizes[type];
453
        rp = buf;
454
        gp = buf + count / 3 * off;
455
        bp = buf + count / 3 * off * 2;
456
        off = (type_sizes[type] - 1) << 3;
457
        for(i = 0; i < count / 3; i++){
458
            j = (tget(&rp, type, s->le) >> off) << 16;
459
            j |= (tget(&gp, type, s->le) >> off) << 8;
460
            j |= tget(&bp, type, s->le) >> off;
461
            pal[i] = j;
462
        }
463
        break;
464
    case TIFF_PLANAR:
465
        if(value == 2){
466
            av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
467
            return -1;
468
        }
469
        break;
470
    case TIFF_T4OPTIONS:
471
        if(s->compr == TIFF_G3)
472
            s->fax_opts = value;
473
        break;
474
    case TIFF_T6OPTIONS:
475
        if(s->compr == TIFF_G4)
476
            s->fax_opts = value;
477
        break;
478
    }
479
    return 0;
480
}
481

    
482
static int decode_frame(AVCodecContext *avctx,
483
                        void *data, int *data_size,
484
                        AVPacket *avpkt)
485
{
486
    const uint8_t *buf = avpkt->data;
487
    int buf_size = avpkt->size;
488
    TiffContext * const s = avctx->priv_data;
489
    AVFrame *picture = data;
490
    AVFrame * const p= (AVFrame*)&s->picture;
491
    const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
492
    int id, le, off, ret;
493
    int i, j, entries;
494
    int stride, soff, ssize;
495
    uint8_t *dst;
496

    
497
    //parse image header
498
    id = AV_RL16(buf); buf += 2;
499
    if(id == 0x4949) le = 1;
500
    else if(id == 0x4D4D) le = 0;
501
    else{
502
        av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
503
        return -1;
504
    }
505
    s->le = le;
506
    s->invert = 0;
507
    s->compr = TIFF_RAW;
508
    s->fill_order = 0;
509
    // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
510
    // that further identifies the file as a TIFF file"
511
    if(tget_short(&buf, le) != 42){
512
        av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
513
        return -1;
514
    }
515
    /* parse image file directory */
516
    off = tget_long(&buf, le);
517
    if(orig_buf + off + 14 >= end_buf){
518
        av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
519
        return -1;
520
    }
521
    buf = orig_buf + off;
522
    entries = tget_short(&buf, le);
523
    for(i = 0; i < entries; i++){
524
        if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
525
            return -1;
526
        buf += 12;
527
    }
528
    if(!s->stripdata && !s->stripoff){
529
        av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
530
        return -1;
531
    }
532
    /* now we have the data and may start decoding */
533
    if ((ret = init_image(s)) < 0)
534
        return ret;
535

    
536
    if(s->strips == 1 && !s->stripsize){
537
        av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
538
        s->stripsize = buf_size - s->stripoff;
539
    }
540
    stride = p->linesize[0];
541
    dst = p->data[0];
542
    for(i = 0; i < s->height; i += s->rps){
543
        if(s->stripsizes)
544
            ssize = tget(&s->stripsizes, s->sstype, s->le);
545
        else
546
            ssize = s->stripsize;
547

    
548
        if (ssize > buf_size) {
549
            av_log(avctx, AV_LOG_ERROR, "Buffer size is smaller than strip size\n");
550
            return -1;
551
        }
552

    
553
        if(s->stripdata){
554
            soff = tget(&s->stripdata, s->sot, s->le);
555
        }else
556
            soff = s->stripoff;
557
        if (soff < 0) {
558
            av_log(avctx, AV_LOG_ERROR, "Invalid stripoff: %d\n", soff);
559
            return AVERROR(EINVAL);
560
        }
561
        if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
562
            break;
563
        dst += s->rps * stride;
564
    }
565
    if(s->predictor == 2){
566
        dst = p->data[0];
567
        soff = s->bpp >> 3;
568
        ssize = s->width * soff;
569
        for(i = 0; i < s->height; i++) {
570
            for(j = soff; j < ssize; j++)
571
                dst[j] += dst[j - soff];
572
            dst += stride;
573
        }
574
    }
575

    
576
    if(s->invert){
577
        uint8_t *src;
578
        int j;
579

    
580
        src = s->picture.data[0];
581
        for(j = 0; j < s->height; j++){
582
            for(i = 0; i < s->picture.linesize[0]; i++)
583
                src[i] = 255 - src[i];
584
            src += s->picture.linesize[0];
585
        }
586
    }
587
    *picture= *(AVFrame*)&s->picture;
588
    *data_size = sizeof(AVPicture);
589

    
590
    return buf_size;
591
}
592

    
593
static av_cold int tiff_init(AVCodecContext *avctx){
594
    TiffContext *s = avctx->priv_data;
595

    
596
    s->width = 0;
597
    s->height = 0;
598
    s->avctx = avctx;
599
    avcodec_get_frame_defaults((AVFrame*)&s->picture);
600
    avctx->coded_frame= (AVFrame*)&s->picture;
601
    ff_lzw_decode_open(&s->lzw);
602
    ff_ccitt_unpack_init();
603

    
604
    return 0;
605
}
606

    
607
static av_cold int tiff_end(AVCodecContext *avctx)
608
{
609
    TiffContext * const s = avctx->priv_data;
610

    
611
    ff_lzw_decode_close(&s->lzw);
612
    if(s->picture.data[0])
613
        avctx->release_buffer(avctx, &s->picture);
614
    return 0;
615
}
616

    
617
AVCodec ff_tiff_decoder = {
618
    "tiff",
619
    AVMEDIA_TYPE_VIDEO,
620
    CODEC_ID_TIFF,
621
    sizeof(TiffContext),
622
    tiff_init,
623
    NULL,
624
    tiff_end,
625
    decode_frame,
626
    CODEC_CAP_DR1,
627
    NULL,
628
    .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
629
};