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
34 #include "libavutil/common.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavcore/imgutils.h"
38 typedef struct TiffContext {
39 AVCodecContext *avctx;
51 int strips, rps, sstype;
53 const uint8_t* stripdata;
54 const uint8_t* stripsizes;
55 int stripsize, stripoff;
59 static int tget_short(const uint8_t **p, int le){
60 int v = le ? AV_RL16(*p) : AV_RB16(*p);
65 static int tget_long(const uint8_t **p, int le){
66 int v = le ? AV_RL32(*p) : AV_RB32(*p);
71 static int tget(const uint8_t **p, int type, int le){
73 case TIFF_BYTE : return *(*p)++;
74 case TIFF_SHORT: return tget_short(p, le);
75 case TIFF_LONG : return tget_long (p, le);
81 static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
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);
93 av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
96 zret = inflate(&zstream, Z_SYNC_FLUSH);
98 *len = zstream.total_out;
99 return zret == Z_STREAM_END ? Z_OK : zret;
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;
108 uint8_t *zbuf; unsigned long outlen;
110 if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
112 outlen = width * lines;
113 zbuf = av_malloc(outlen);
114 ret = tiff_uncompress(zbuf, &outlen, src, size);
116 av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu) with error %d\n", outlen, (unsigned long)width * lines, ret);
121 for(line = 0; line < lines; line++){
122 memcpy(dst, src, width);
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");
136 if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
138 uint8_t *src2 = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
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");
145 av_log(s->avctx, AV_LOG_ERROR, "Uncompressed fax mode is not supported (yet)\n");
150 memcpy(src2, src, size);
152 for(i = 0; i < size; i++)
153 src2[i] = av_reverse[src[i]];
155 memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
160 ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr, s->fax_opts);
166 for(line = 0; line < lines; line++){
167 if(src - ssrc > size){
168 av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
173 memcpy(dst, src, width);
177 for(pixels = 0; pixels < width;){
178 code = (int8_t)*src++;
181 if(pixels + code > width){
182 av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
185 memcpy(dst + pixels, src, code);
188 }else if(code != -128){ // -127..-1
190 if(pixels + code > width){
191 av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
195 memset(dst + pixels, c, code);
201 pixels = ff_lzw_decode(s->lzw, dst, width);
203 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
214 static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
216 int tag, type, count, off, value = 0;
219 const uint8_t *rp, *gp, *bp;
221 tag = tget_short(&buf, s->le);
222 type = tget_short(&buf, s->le);
223 count = tget_long(&buf, s->le);
224 off = tget_long(&buf, s->le);
231 value = tget(&buf, type, s->le);
247 }else if(type_sizes[type] * count <= 4){
253 if(buf && (buf < start || buf > end_buf)){
254 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
266 if(count == 1) s->bpp = value;
270 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
275 for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
282 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
285 switch(s->bpp*10 + count){
287 s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
290 s->avctx->pix_fmt = PIX_FMT_PAL8;
293 s->avctx->pix_fmt = PIX_FMT_RGB24;
296 s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
299 s->avctx->pix_fmt = PIX_FMT_RGBA;
302 s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
305 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
308 if(s->width != s->avctx->width || s->height != s->avctx->height){
309 if(av_check_image_size(s->width, s->height, 0, s->avctx))
311 avcodec_set_dimensions(s->avctx, s->width, s->height);
313 if(s->picture.data[0])
314 s->avctx->release_buffer(s->avctx, &s->picture);
315 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
316 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
320 /* make default grayscale pal */
321 pal = (uint32_t *) s->picture.data[1];
322 for(i = 0; i < 256; i++)
323 pal[i] = i * 0x010101;
340 case TIFF_ADOBE_DEFLATE:
344 av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
349 av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
352 av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
356 case TIFF_ROWSPERSTRIP:
357 if(type == TIFF_LONG && value == -1)
358 value = s->avctx->height;
360 av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
365 case TIFF_STRIP_OFFS:
370 s->stripdata = start + off;
372 if(s->strips == 1) s->rps = s->height;
374 if(s->stripdata > end_buf){
375 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
379 case TIFF_STRIP_SIZE:
381 s->stripsizes = NULL;
382 s->stripsize = value;
385 s->stripsizes = start + off;
389 if(s->stripsizes > end_buf){
390 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
395 s->predictor = value;
409 av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
413 case TIFF_FILL_ORDER:
414 if(value < 1 || value > 2){
415 av_log(s->avctx, AV_LOG_ERROR, "Unknown FillOrder value %d, trying default one\n", value);
418 s->fill_order = value - 1;
421 if(s->avctx->pix_fmt != PIX_FMT_PAL8){
422 av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
425 pal = (uint32_t *) s->picture.data[1];
426 off = type_sizes[type];
428 gp = buf + count / 3 * off;
429 bp = buf + count / 3 * off * 2;
430 off = (type_sizes[type] - 1) << 3;
431 for(i = 0; i < count / 3; i++){
432 j = (tget(&rp, type, s->le) >> off) << 16;
433 j |= (tget(&gp, type, s->le) >> off) << 8;
434 j |= tget(&bp, type, s->le) >> off;
440 av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
445 if(s->compr == TIFF_G3)
449 if(s->compr == TIFF_G4)
456 static int decode_frame(AVCodecContext *avctx,
457 void *data, int *data_size,
460 const uint8_t *buf = avpkt->data;
461 int buf_size = avpkt->size;
462 TiffContext * const s = avctx->priv_data;
463 AVFrame *picture = data;
464 AVFrame * const p= (AVFrame*)&s->picture;
465 const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
468 int stride, soff, ssize;
472 id = AV_RL16(buf); buf += 2;
473 if(id == 0x4949) le = 1;
474 else if(id == 0x4D4D) le = 0;
476 av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
483 // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
484 // that further identifies the file as a TIFF file"
485 if(tget_short(&buf, le) != 42){
486 av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
489 /* parse image file directory */
490 off = tget_long(&buf, le);
491 if(orig_buf + off + 14 >= end_buf){
492 av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
495 buf = orig_buf + off;
496 entries = tget_short(&buf, le);
497 for(i = 0; i < entries; i++){
498 if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
502 if(!s->stripdata && !s->stripoff){
503 av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
506 /* now we have the data and may start decoding */
509 avctx->pix_fmt = PIX_FMT_MONOBLACK;
510 if(s->width != s->avctx->width || s->height != s->avctx->height){
511 if(av_check_image_size(s->width, s->height, 0, s->avctx))
513 avcodec_set_dimensions(s->avctx, s->width, s->height);
515 if(s->picture.data[0])
516 s->avctx->release_buffer(s->avctx, &s->picture);
517 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
518 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
522 if(s->strips == 1 && !s->stripsize){
523 av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
524 s->stripsize = buf_size - s->stripoff;
526 stride = p->linesize[0];
528 for(i = 0; i < s->height; i += s->rps){
530 ssize = tget(&s->stripsizes, s->sstype, s->le);
532 ssize = s->stripsize;
535 soff = tget(&s->stripdata, s->sot, s->le);
538 if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
540 dst += s->rps * stride;
542 if(s->predictor == 2){
545 ssize = s->width * soff;
546 for(i = 0; i < s->height; i++) {
547 for(j = soff; j < ssize; j++)
548 dst[j] += dst[j - soff];
557 src = s->picture.data[0];
558 for(j = 0; j < s->height; j++){
559 for(i = 0; i < s->picture.linesize[0]; i++)
560 src[i] = 255 - src[i];
561 src += s->picture.linesize[0];
564 *picture= *(AVFrame*)&s->picture;
565 *data_size = sizeof(AVPicture);
570 static av_cold int tiff_init(AVCodecContext *avctx){
571 TiffContext *s = avctx->priv_data;
576 avcodec_get_frame_defaults((AVFrame*)&s->picture);
577 avctx->coded_frame= (AVFrame*)&s->picture;
578 ff_lzw_decode_open(&s->lzw);
579 ff_ccitt_unpack_init();
584 static av_cold int tiff_end(AVCodecContext *avctx)
586 TiffContext * const s = avctx->priv_data;
588 ff_lzw_decode_close(&s->lzw);
589 if(s->picture.data[0])
590 avctx->release_buffer(avctx, &s->picture);
594 AVCodec tiff_decoder = {
605 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),