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ffmpeg / libavcodec / tiff.c @ aa909d30

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1
/*
2
 * Copyright (c) 2006 Konstantin Shishkov
3
 *
4
 * This file is part of FFmpeg.
5
 *
6
 * FFmpeg is free software; you can redistribute it and/or
7
 * modify it under the terms of the GNU Lesser General Public
8
 * 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.
10
 *
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 * FFmpeg is distributed in the hope that it will be useful,
12
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14
 * Lesser General Public License for more details.
15
 *
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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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 */
20

    
21
/**
22
 * @file
23
 * TIFF image decoder
24
 */
25
#include "avcodec.h"
26
#if CONFIG_ZLIB
27
#include <zlib.h>
28
#endif
29
#include "lzw.h"
30
#include "tiff.h"
31
#include "faxcompr.h"
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
34
#include "libavutil/imgutils.h"
35

    
36
typedef struct TiffContext {
37
    AVCodecContext *avctx;
38
    AVFrame picture;
39

    
40
    int width, height;
41
    unsigned int bpp;
42
    int le;
43
    enum TiffCompr compr;
44
    int invert;
45
    int fax_opts;
46
    int predictor;
47
    int fill_order;
48

    
49
    int strips, rps, sstype;
50
    int sot;
51
    const uint8_t* stripdata;
52
    const uint8_t* stripsizes;
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    int stripsize, stripoff;
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    LZWState *lzw;
55
} TiffContext;
56

    
57
static int tget_short(const uint8_t **p, int le){
58
    int v = le ? AV_RL16(*p) : AV_RB16(*p);
59
    *p += 2;
60
    return v;
61
}
62

    
63
static int tget_long(const uint8_t **p, int le){
64
    int v = le ? AV_RL32(*p) : AV_RB32(*p);
65
    *p += 4;
66
    return v;
67
}
68

    
69
static int tget(const uint8_t **p, int type, int le){
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    switch(type){
71
    case TIFF_BYTE : return *(*p)++;
72
    case TIFF_SHORT: return tget_short(p, le);
73
    case TIFF_LONG : return tget_long (p, le);
74
    default        : return -1;
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    }
76
}
77

    
78
#if CONFIG_ZLIB
79
static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
80
{
81
    z_stream zstream;
82
    int zret;
83

    
84
    memset(&zstream, 0, sizeof(zstream));
85
    zstream.next_in = src;
86
    zstream.avail_in = size;
87
    zstream.next_out = dst;
88
    zstream.avail_out = *len;
89
    zret = inflateInit(&zstream);
90
    if (zret != Z_OK) {
91
        av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
92
        return zret;
93
    }
94
    zret = inflate(&zstream, Z_SYNC_FLUSH);
95
    inflateEnd(&zstream);
96
    *len = zstream.total_out;
97
    return zret == Z_STREAM_END ? Z_OK : zret;
98
}
99
#endif
100

    
101
static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
102
    int c, line, pixels, code;
103
    const uint8_t *ssrc = src;
104
    int width = s->width * s->bpp >> 3;
105
#if CONFIG_ZLIB
106
    uint8_t *zbuf; unsigned long outlen;
107

    
108
    if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
109
        int ret;
110
        outlen = width * lines;
111
        zbuf = av_malloc(outlen);
112
        ret = tiff_uncompress(zbuf, &outlen, src, size);
113
        if(ret != Z_OK){
114
            av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu) with error %d\n", outlen, (unsigned long)width * lines, ret);
115
            av_free(zbuf);
116
            return -1;
117
        }
118
        src = zbuf;
119
        for(line = 0; line < lines; line++){
120
            memcpy(dst, src, width);
121
            dst += stride;
122
            src += width;
123
        }
124
        av_free(zbuf);
125
        return 0;
126
    }
127
#endif
128
    if(s->compr == TIFF_LZW){
129
        if(ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0){
130
            av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
131
            return -1;
132
        }
133
    }
134
    if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
135
        int i, ret = 0;
136
        uint8_t *src2 = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
137

    
138
        if(!src2 || (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE < (unsigned)size){
139
            av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
140
            return -1;
141
        }
142
        if(s->fax_opts & 2){
143
            av_log(s->avctx, AV_LOG_ERROR, "Uncompressed fax mode is not supported (yet)\n");
144
            av_free(src2);
145
            return -1;
146
        }
147
        if(!s->fill_order){
148
            memcpy(src2, src, size);
149
        }else{
150
            for(i = 0; i < size; i++)
151
                src2[i] = av_reverse[src[i]];
152
        }
153
        memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
154
        switch(s->compr){
155
        case TIFF_CCITT_RLE:
156
        case TIFF_G3:
157
        case TIFF_G4:
158
            ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr, s->fax_opts);
159
            break;
160
        }
161
        av_free(src2);
162
        return ret;
163
    }
164
    for(line = 0; line < lines; line++){
165
        if(src - ssrc > size){
166
            av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
167
            return -1;
168
        }
169
        switch(s->compr){
170
        case TIFF_RAW:
171
            memcpy(dst, src, width);
172
            src += width;
173
            break;
174
        case TIFF_PACKBITS:
175
            for(pixels = 0; pixels < width;){
176
                code = (int8_t)*src++;
177
                if(code >= 0){
178
                    code++;
179
                    if(pixels + code > width){
180
                        av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
181
                        return -1;
182
                    }
183
                    memcpy(dst + pixels, src, code);
184
                    src += code;
185
                    pixels += code;
186
                }else if(code != -128){ // -127..-1
187
                    code = (-code) + 1;
188
                    if(pixels + code > width){
189
                        av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
190
                        return -1;
191
                    }
192
                    c = *src++;
193
                    memset(dst + pixels, c, code);
194
                    pixels += code;
195
                }
196
            }
197
            break;
198
        case TIFF_LZW:
199
            pixels = ff_lzw_decode(s->lzw, dst, width);
200
            if(pixels < width){
201
                av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
202
                return -1;
203
            }
204
            break;
205
        }
206
        dst += stride;
207
    }
208
    return 0;
209
}
210

    
211

    
212
static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
213
{
214
    int tag, type, count, off, value = 0;
215
    int i, j;
216
    uint32_t *pal;
217
    const uint8_t *rp, *gp, *bp;
218

    
219
    tag = tget_short(&buf, s->le);
220
    type = tget_short(&buf, s->le);
221
    count = tget_long(&buf, s->le);
222
    off = tget_long(&buf, s->le);
223

    
224
    if(count == 1){
225
        switch(type){
226
        case TIFF_BYTE:
227
        case TIFF_SHORT:
228
            buf -= 4;
229
            value = tget(&buf, type, s->le);
230
            buf = NULL;
231
            break;
232
        case TIFF_LONG:
233
            value = off;
234
            buf = NULL;
235
            break;
236
        case TIFF_STRING:
237
            if(count <= 4){
238
                buf -= 4;
239
                break;
240
            }
241
        default:
242
            value = -1;
243
            buf = start + off;
244
        }
245
    }else if(type_sizes[type] * count <= 4){
246
        buf -= 4;
247
    }else{
248
        buf = start + off;
249
    }
250

    
251
    if(buf && (buf < start || buf > end_buf)){
252
        av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
253
        return -1;
254
    }
255

    
256
    switch(tag){
257
    case TIFF_WIDTH:
258
        s->width = value;
259
        break;
260
    case TIFF_HEIGHT:
261
        s->height = value;
262
        break;
263
    case TIFF_BPP:
264
        if(count > 4){
265
            av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
266
            return -1;
267
        }
268
        if(count == 1) s->bpp = value;
269
        else{
270
            switch(type){
271
            case TIFF_BYTE:
272
                s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
273
                break;
274
            case TIFF_SHORT:
275
            case TIFF_LONG:
276
                s->bpp = 0;
277
                for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
278
                break;
279
            default:
280
                s->bpp = -1;
281
            }
282
        }
283
        switch(s->bpp*10 + count){
284
        case 11:
285
            s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
286
            break;
287
        case 81:
288
            s->avctx->pix_fmt = PIX_FMT_PAL8;
289
            break;
290
        case 243:
291
            s->avctx->pix_fmt = PIX_FMT_RGB24;
292
            break;
293
        case 161:
294
            s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
295
            break;
296
        case 324:
297
            s->avctx->pix_fmt = PIX_FMT_RGBA;
298
            break;
299
        case 483:
300
            s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
301
            break;
302
        default:
303
            av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
304
            return -1;
305
        }
306
        if(s->width != s->avctx->width || s->height != s->avctx->height){
307
            if(av_image_check_size(s->width, s->height, 0, s->avctx))
308
                return -1;
309
            avcodec_set_dimensions(s->avctx, s->width, s->height);
310
        }
311
        if(s->picture.data[0])
312
            s->avctx->release_buffer(s->avctx, &s->picture);
313
        if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
314
            av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
315
            return -1;
316
        }
317
        if(s->bpp == 8){
318
            /* make default grayscale pal */
319
            pal = (uint32_t *) s->picture.data[1];
320
            for(i = 0; i < 256; i++)
321
                pal[i] = i * 0x010101;
322
        }
323
        break;
324
    case TIFF_COMPR:
325
        s->compr = value;
326
        s->predictor = 0;
327
        switch(s->compr){
328
        case TIFF_RAW:
329
        case TIFF_PACKBITS:
330
        case TIFF_LZW:
331
        case TIFF_CCITT_RLE:
332
            break;
333
        case TIFF_G3:
334
        case TIFF_G4:
335
            s->fax_opts = 0;
336
            break;
337
        case TIFF_DEFLATE:
338
        case TIFF_ADOBE_DEFLATE:
339
#if CONFIG_ZLIB
340
            break;
341
#else
342
            av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
343
            return -1;
344
#endif
345
        case TIFF_JPEG:
346
        case TIFF_NEWJPEG:
347
            av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
348
            return -1;
349
        default:
350
            av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
351
            return -1;
352
        }
353
        break;
354
    case TIFF_ROWSPERSTRIP:
355
        if(type == TIFF_LONG && value == -1)
356
            value = s->avctx->height;
357
        if(value < 1){
358
            av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
359
            return -1;
360
        }
361
        s->rps = value;
362
        break;
363
    case TIFF_STRIP_OFFS:
364
        if(count == 1){
365
            s->stripdata = NULL;
366
            s->stripoff = value;
367
        }else
368
            s->stripdata = start + off;
369
        s->strips = count;
370
        if(s->strips == 1) s->rps = s->height;
371
        s->sot = type;
372
        if(s->stripdata > end_buf){
373
            av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
374
            return -1;
375
        }
376
        break;
377
    case TIFF_STRIP_SIZE:
378
        if(count == 1){
379
            s->stripsizes = NULL;
380
            s->stripsize = value;
381
            s->strips = 1;
382
        }else{
383
            s->stripsizes = start + off;
384
        }
385
        s->strips = count;
386
        s->sstype = type;
387
        if(s->stripsizes > end_buf){
388
            av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
389
            return -1;
390
        }
391
        break;
392
    case TIFF_PREDICTOR:
393
        s->predictor = value;
394
        break;
395
    case TIFF_INVERT:
396
        switch(value){
397
        case 0:
398
            s->invert = 1;
399
            break;
400
        case 1:
401
            s->invert = 0;
402
            break;
403
        case 2:
404
        case 3:
405
            break;
406
        default:
407
            av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
408
            return -1;
409
        }
410
        break;
411
    case TIFF_FILL_ORDER:
412
        if(value < 1 || value > 2){
413
            av_log(s->avctx, AV_LOG_ERROR, "Unknown FillOrder value %d, trying default one\n", value);
414
            value = 1;
415
        }
416
        s->fill_order = value - 1;
417
        break;
418
    case TIFF_PAL:
419
        if(s->avctx->pix_fmt != PIX_FMT_PAL8){
420
            av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
421
            return -1;
422
        }
423
        pal = (uint32_t *) s->picture.data[1];
424
        off = type_sizes[type];
425
        rp = buf;
426
        gp = buf + count / 3 * off;
427
        bp = buf + count / 3 * off * 2;
428
        off = (type_sizes[type] - 1) << 3;
429
        for(i = 0; i < count / 3; i++){
430
            j = 0xff << 24;
431
            j |= (tget(&rp, type, s->le) >> off) << 16;
432
            j |= (tget(&gp, type, s->le) >> off) << 8;
433
            j |= tget(&bp, type, s->le) >> off;
434
            pal[i] = j;
435
        }
436
        break;
437
    case TIFF_PLANAR:
438
        if(value == 2){
439
            av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
440
            return -1;
441
        }
442
        break;
443
    case TIFF_T4OPTIONS:
444
        if(s->compr == TIFF_G3)
445
            s->fax_opts = value;
446
        break;
447
    case TIFF_T6OPTIONS:
448
        if(s->compr == TIFF_G4)
449
            s->fax_opts = value;
450
        break;
451
    }
452
    return 0;
453
}
454

    
455
static int decode_frame(AVCodecContext *avctx,
456
                        void *data, int *data_size,
457
                        AVPacket *avpkt)
458
{
459
    const uint8_t *buf = avpkt->data;
460
    int buf_size = avpkt->size;
461
    TiffContext * const s = avctx->priv_data;
462
    AVFrame *picture = data;
463
    AVFrame * const p= (AVFrame*)&s->picture;
464
    const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
465
    int id, le, off;
466
    int i, j, entries;
467
    int stride, soff, ssize;
468
    uint8_t *dst;
469

    
470
    //parse image header
471
    id = AV_RL16(buf); buf += 2;
472
    if(id == 0x4949) le = 1;
473
    else if(id == 0x4D4D) le = 0;
474
    else{
475
        av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
476
        return -1;
477
    }
478
    s->le = le;
479
    s->invert = 0;
480
    s->compr = TIFF_RAW;
481
    s->fill_order = 0;
482
    // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
483
    // that further identifies the file as a TIFF file"
484
    if(tget_short(&buf, le) != 42){
485
        av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
486
        return -1;
487
    }
488
    /* parse image file directory */
489
    off = tget_long(&buf, le);
490
    if(orig_buf + off + 14 >= end_buf){
491
        av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
492
        return -1;
493
    }
494
    buf = orig_buf + off;
495
    entries = tget_short(&buf, le);
496
    for(i = 0; i < entries; i++){
497
        if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
498
            return -1;
499
        buf += 12;
500
    }
501
    if(!s->stripdata && !s->stripoff){
502
        av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
503
        return -1;
504
    }
505
    /* now we have the data and may start decoding */
506
    if(!p->data[0]){
507
        s->bpp = 1;
508
        avctx->pix_fmt = PIX_FMT_MONOBLACK;
509
        if(s->width != s->avctx->width || s->height != s->avctx->height){
510
            if(av_image_check_size(s->width, s->height, 0, s->avctx))
511
                return -1;
512
            avcodec_set_dimensions(s->avctx, s->width, s->height);
513
        }
514
        if(s->picture.data[0])
515
            s->avctx->release_buffer(s->avctx, &s->picture);
516
        if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
517
            av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
518
            return -1;
519
        }
520
    }
521
    if(s->strips == 1 && !s->stripsize){
522
        av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
523
        s->stripsize = buf_size - s->stripoff;
524
    }
525
    stride = p->linesize[0];
526
    dst = p->data[0];
527
    for(i = 0; i < s->height; i += s->rps){
528
        if(s->stripsizes)
529
            ssize = tget(&s->stripsizes, s->sstype, s->le);
530
        else
531
            ssize = s->stripsize;
532

    
533
        if (ssize > buf_size) {
534
            av_log(avctx, AV_LOG_ERROR, "Buffer size is smaller than strip size\n");
535
            return -1;
536
        }
537

    
538
        if(s->stripdata){
539
            soff = tget(&s->stripdata, s->sot, s->le);
540
        }else
541
            soff = s->stripoff;
542
        if (soff < 0) {
543
            av_log(avctx, AV_LOG_ERROR, "Invalid stripoff: %d\n", soff);
544
            return AVERROR(EINVAL);
545
        }
546
        if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
547
            break;
548
        dst += s->rps * stride;
549
    }
550
    if(s->predictor == 2){
551
        dst = p->data[0];
552
        soff = s->bpp >> 3;
553
        ssize = s->width * soff;
554
        for(i = 0; i < s->height; i++) {
555
            for(j = soff; j < ssize; j++)
556
                dst[j] += dst[j - soff];
557
            dst += stride;
558
        }
559
    }
560

    
561
    if(s->invert){
562
        uint8_t *src;
563
        int j;
564

    
565
        src = s->picture.data[0];
566
        for(j = 0; j < s->height; j++){
567
            for(i = 0; i < s->picture.linesize[0]; i++)
568
                src[i] = 255 - src[i];
569
            src += s->picture.linesize[0];
570
        }
571
    }
572
    *picture= *(AVFrame*)&s->picture;
573
    *data_size = sizeof(AVPicture);
574

    
575
    return buf_size;
576
}
577

    
578
static av_cold int tiff_init(AVCodecContext *avctx){
579
    TiffContext *s = avctx->priv_data;
580

    
581
    s->width = 0;
582
    s->height = 0;
583
    s->avctx = avctx;
584
    avcodec_get_frame_defaults((AVFrame*)&s->picture);
585
    avctx->coded_frame= (AVFrame*)&s->picture;
586
    ff_lzw_decode_open(&s->lzw);
587
    ff_ccitt_unpack_init();
588

    
589
    return 0;
590
}
591

    
592
static av_cold int tiff_end(AVCodecContext *avctx)
593
{
594
    TiffContext * const s = avctx->priv_data;
595

    
596
    ff_lzw_decode_close(&s->lzw);
597
    if(s->picture.data[0])
598
        avctx->release_buffer(avctx, &s->picture);
599
    return 0;
600
}
601

    
602
AVCodec ff_tiff_decoder = {
603
    "tiff",
604
    AVMEDIA_TYPE_VIDEO,
605
    CODEC_ID_TIFF,
606
    sizeof(TiffContext),
607
    tiff_init,
608
    NULL,
609
    tiff_end,
610
    decode_frame,
611
    CODEC_CAP_DR1,
612
    NULL,
613
    .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
614
};