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"
37 typedef struct TiffContext {
38 AVCodecContext *avctx;
50 int strips, rps, sstype;
52 const uint8_t* stripdata;
53 const uint8_t* stripsizes;
54 int stripsize, stripoff;
58 static int tget_short(const uint8_t **p, int le){
59 int v = le ? AV_RL16(*p) : AV_RB16(*p);
64 static int tget_long(const uint8_t **p, int le){
65 int v = le ? AV_RL32(*p) : AV_RB32(*p);
70 static int tget(const uint8_t **p, int type, int le){
72 case TIFF_BYTE : return *(*p)++;
73 case TIFF_SHORT: return tget_short(p, le);
74 case TIFF_LONG : return tget_long (p, le);
80 static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
85 memset(&zstream, 0, sizeof(zstream));
86 zstream.next_in = src;
87 zstream.avail_in = size;
88 zstream.next_out = dst;
89 zstream.avail_out = *len;
90 zret = inflateInit(&zstream);
92 av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
95 zret = inflate(&zstream, Z_SYNC_FLUSH);
97 *len = zstream.total_out;
98 return zret == Z_STREAM_END ? Z_OK : zret;
102 static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
103 int c, line, pixels, code;
104 const uint8_t *ssrc = src;
105 int width = s->width * s->bpp >> 3;
107 uint8_t *zbuf; unsigned long outlen;
109 if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
111 outlen = width * lines;
112 zbuf = av_malloc(outlen);
113 ret = tiff_uncompress(zbuf, &outlen, src, size);
115 av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu) with error %d\n", outlen, (unsigned long)width * lines, ret);
120 for(line = 0; line < lines; line++){
121 memcpy(dst, src, width);
129 if(s->compr == TIFF_LZW){
130 if(ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0){
131 av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
135 if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
137 uint8_t *src2 = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
139 if(!src2 || (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE < (unsigned)size){
140 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
144 av_log(s->avctx, AV_LOG_ERROR, "Uncompressed fax mode is not supported (yet)\n");
149 memcpy(src2, src, size);
151 for(i = 0; i < size; i++)
152 src2[i] = av_reverse[src[i]];
154 memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
159 ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr, s->fax_opts);
165 for(line = 0; line < lines; line++){
166 if(src - ssrc > size){
167 av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
172 memcpy(dst, src, width);
176 for(pixels = 0; pixels < width;){
177 code = (int8_t)*src++;
180 if(pixels + code > width){
181 av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
184 memcpy(dst + pixels, src, code);
187 }else if(code != -128){ // -127..-1
189 if(pixels + code > width){
190 av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
194 memset(dst + pixels, c, code);
200 pixels = ff_lzw_decode(s->lzw, dst, width);
202 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
213 static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
215 int tag, type, count, off, value = 0;
218 const uint8_t *rp, *gp, *bp;
220 tag = tget_short(&buf, s->le);
221 type = tget_short(&buf, s->le);
222 count = tget_long(&buf, s->le);
223 off = tget_long(&buf, s->le);
230 value = tget(&buf, type, s->le);
246 }else if(type_sizes[type] * count <= 4){
252 if(buf && (buf < start || buf > end_buf)){
253 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
265 if(count == 1) s->bpp = value;
269 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
274 for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
281 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
284 switch(s->bpp*10 + count){
286 s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
289 s->avctx->pix_fmt = PIX_FMT_PAL8;
292 s->avctx->pix_fmt = PIX_FMT_RGB24;
295 s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
298 s->avctx->pix_fmt = PIX_FMT_RGBA;
301 s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
304 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
307 if(s->width != s->avctx->width || s->height != s->avctx->height){
308 if(avcodec_check_dimensions(s->avctx, s->width, s->height))
310 avcodec_set_dimensions(s->avctx, s->width, s->height);
312 if(s->picture.data[0])
313 s->avctx->release_buffer(s->avctx, &s->picture);
314 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
315 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
319 /* make default grayscale pal */
320 pal = (uint32_t *) s->picture.data[1];
321 for(i = 0; i < 256; i++)
322 pal[i] = i * 0x010101;
339 case TIFF_ADOBE_DEFLATE:
343 av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
348 av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
351 av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
355 case TIFF_ROWSPERSTRIP:
356 if(type == TIFF_LONG && value == -1)
357 value = s->avctx->height;
359 av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
364 case TIFF_STRIP_OFFS:
369 s->stripdata = start + off;
371 if(s->strips == 1) s->rps = s->height;
373 if(s->stripdata > end_buf){
374 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
378 case TIFF_STRIP_SIZE:
380 s->stripsizes = NULL;
381 s->stripsize = value;
384 s->stripsizes = start + off;
388 if(s->stripsizes > end_buf){
389 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
394 s->predictor = value;
408 av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
412 case TIFF_FILL_ORDER:
413 if(value < 1 || value > 2){
414 av_log(s->avctx, AV_LOG_ERROR, "Unknown FillOrder value %d, trying default one\n", value);
417 s->fill_order = value - 1;
420 if(s->avctx->pix_fmt != PIX_FMT_PAL8){
421 av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
424 pal = (uint32_t *) s->picture.data[1];
425 off = type_sizes[type];
427 gp = buf + count / 3 * off;
428 bp = buf + count / 3 * off * 2;
429 off = (type_sizes[type] - 1) << 3;
430 for(i = 0; i < count / 3; i++){
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;
439 av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
444 if(s->compr == TIFF_G3)
448 if(s->compr == TIFF_G4)
455 static int decode_frame(AVCodecContext *avctx,
456 void *data, int *data_size,
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;
467 int stride, soff, ssize;
471 id = AV_RL16(buf); buf += 2;
472 if(id == 0x4949) le = 1;
473 else if(id == 0x4D4D) le = 0;
475 av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
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");
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");
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)
501 if(!s->stripdata && !s->stripoff){
502 av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
505 /* now we have the data and may start decoding */
508 avctx->pix_fmt = PIX_FMT_MONOBLACK;
509 if(s->width != s->avctx->width || s->height != s->avctx->height){
510 if(avcodec_check_dimensions(s->avctx, s->width, s->height))
512 avcodec_set_dimensions(s->avctx, s->width, s->height);
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");
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;
525 stride = p->linesize[0];
527 for(i = 0; i < s->height; i += s->rps){
529 ssize = tget(&s->stripsizes, s->sstype, s->le);
531 ssize = s->stripsize;
534 soff = tget(&s->stripdata, s->sot, s->le);
537 if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
539 dst += s->rps * stride;
541 if(s->predictor == 2){
544 ssize = s->width * soff;
545 for(i = 0; i < s->height; i++) {
546 for(j = soff; j < ssize; j++)
547 dst[j] += dst[j - soff];
556 src = s->picture.data[0];
557 for(j = 0; j < s->height; j++){
558 for(i = 0; i < s->picture.linesize[0]; i++)
559 src[i] = 255 - src[i];
560 src += s->picture.linesize[0];
563 *picture= *(AVFrame*)&s->picture;
564 *data_size = sizeof(AVPicture);
569 static av_cold int tiff_init(AVCodecContext *avctx){
570 TiffContext *s = avctx->priv_data;
575 avcodec_get_frame_defaults((AVFrame*)&s->picture);
576 avctx->coded_frame= (AVFrame*)&s->picture;
577 ff_lzw_decode_open(&s->lzw);
578 ff_ccitt_unpack_init();
583 static av_cold int tiff_end(AVCodecContext *avctx)
585 TiffContext * const s = avctx->priv_data;
587 ff_lzw_decode_close(&s->lzw);
588 if(s->picture.data[0])
589 avctx->release_buffer(avctx, &s->picture);
593 AVCodec tiff_decoder = {
604 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),