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
24 * @file libavcodec/tiff.c
25 * @author Konstantin Shishkov
36 typedef struct TiffContext {
37 AVCodecContext *avctx;
49 int strips, rps, sstype;
51 const uint8_t* stripdata;
52 const uint8_t* stripsizes;
53 int stripsize, stripoff;
57 static int tget_short(const uint8_t **p, int le){
58 int v = le ? AV_RL16(*p) : AV_RB16(*p);
63 static int tget_long(const uint8_t **p, int le){
64 int v = le ? AV_RL32(*p) : AV_RB32(*p);
69 static int tget(const uint8_t **p, int type, int le){
71 case TIFF_BYTE : return *(*p)++;
72 case TIFF_SHORT: return tget_short(p, le);
73 case TIFF_LONG : return tget_long (p, le);
79 static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
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);
91 av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
94 zret = inflate(&zstream, Z_SYNC_FLUSH);
96 *len = zstream.total_out;
97 return zret == Z_STREAM_END ? Z_OK : zret;
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;
106 uint8_t *zbuf; unsigned long outlen;
108 if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
110 outlen = width * lines;
111 zbuf = av_malloc(outlen);
112 ret = tiff_uncompress(zbuf, &outlen, src, size);
114 av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu) with error %d\n", outlen, (unsigned long)width * lines, ret);
119 for(line = 0; line < lines; line++){
120 memcpy(dst, src, width);
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");
134 if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
136 uint8_t *src2 = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
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");
143 av_log(s->avctx, AV_LOG_ERROR, "Uncompressed fax mode is not supported (yet)\n");
148 memcpy(src2, src, size);
150 for(i = 0; i < size; i++)
151 src2[i] = ff_reverse[src[i]];
153 memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
158 ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr, s->fax_opts);
164 for(line = 0; line < lines; line++){
165 if(src - ssrc > size){
166 av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
171 memcpy(dst, src, width);
175 for(pixels = 0; pixels < width;){
176 code = (int8_t)*src++;
179 if(pixels + code > width){
180 av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
183 memcpy(dst + pixels, src, code);
186 }else if(code != -128){ // -127..-1
188 if(pixels + code > width){
189 av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
193 memset(dst + pixels, c, code);
199 pixels = ff_lzw_decode(s->lzw, dst, width);
201 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
212 static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
214 int tag, type, count, off, value = 0;
217 const uint8_t *rp, *gp, *bp;
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);
229 value = tget(&buf, type, s->le);
245 }else if(type_sizes[type] * count <= 4){
251 if(buf && (buf < start || buf > end_buf)){
252 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
264 if(count == 1) s->bpp = value;
268 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
273 for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
280 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
283 switch(s->bpp*10 + count){
285 s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
288 s->avctx->pix_fmt = PIX_FMT_PAL8;
291 s->avctx->pix_fmt = PIX_FMT_RGB24;
294 s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
297 s->avctx->pix_fmt = PIX_FMT_RGBA;
300 s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
303 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
306 if(s->width != s->avctx->width || s->height != s->avctx->height){
307 if(avcodec_check_dimensions(s->avctx, s->width, s->height))
309 avcodec_set_dimensions(s->avctx, s->width, s->height);
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");
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;
338 case TIFF_ADOBE_DEFLATE:
342 av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
347 av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
350 av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
354 case TIFF_ROWSPERSTRIP:
355 if(type == TIFF_LONG && value == -1)
356 value = s->avctx->height;
358 av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
363 case TIFF_STRIP_OFFS:
368 s->stripdata = start + off;
370 if(s->strips == 1) s->rps = s->height;
372 if(s->stripdata > end_buf){
373 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
377 case TIFF_STRIP_SIZE:
379 s->stripsizes = NULL;
380 s->stripsize = value;
383 s->stripsizes = start + off;
387 if(s->stripsizes > end_buf){
388 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
393 s->predictor = value;
407 av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
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);
416 s->fill_order = value - 1;
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");
423 pal = (uint32_t *) s->picture.data[1];
424 off = type_sizes[type];
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 = (tget(&rp, type, s->le) >> off) << 16;
431 j |= (tget(&gp, type, s->le) >> off) << 8;
432 j |= tget(&bp, type, s->le) >> off;
438 av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
443 if(s->compr == TIFF_G3)
447 if(s->compr == TIFF_G4)
454 static int decode_frame(AVCodecContext *avctx,
455 void *data, int *data_size,
458 const uint8_t *buf = avpkt->data;
459 int buf_size = avpkt->size;
460 TiffContext * const s = avctx->priv_data;
461 AVFrame *picture = data;
462 AVFrame * const p= (AVFrame*)&s->picture;
463 const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
466 int stride, soff, ssize;
470 id = AV_RL16(buf); buf += 2;
471 if(id == 0x4949) le = 1;
472 else if(id == 0x4D4D) le = 0;
474 av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
481 // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
482 // that further identifies the file as a TIFF file"
483 if(tget_short(&buf, le) != 42){
484 av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
487 /* parse image file directory */
488 off = tget_long(&buf, le);
489 if(orig_buf + off + 14 >= end_buf){
490 av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
493 buf = orig_buf + off;
494 entries = tget_short(&buf, le);
495 for(i = 0; i < entries; i++){
496 if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
500 if(!s->stripdata && !s->stripoff){
501 av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
504 /* now we have the data and may start decoding */
507 avctx->pix_fmt = PIX_FMT_MONOBLACK;
508 if(s->width != s->avctx->width || s->height != s->avctx->height){
509 if(avcodec_check_dimensions(s->avctx, s->width, s->height))
511 avcodec_set_dimensions(s->avctx, s->width, s->height);
513 if(s->picture.data[0])
514 s->avctx->release_buffer(s->avctx, &s->picture);
515 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
516 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
520 if(s->strips == 1 && !s->stripsize){
521 av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
522 s->stripsize = buf_size - s->stripoff;
524 stride = p->linesize[0];
526 for(i = 0; i < s->height; i += s->rps){
528 ssize = tget(&s->stripsizes, s->sstype, s->le);
530 ssize = s->stripsize;
533 soff = tget(&s->stripdata, s->sot, s->le);
536 if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
538 dst += s->rps * stride;
540 if(s->predictor == 2){
543 ssize = s->width * soff;
544 for(i = 0; i < s->height; i++) {
545 for(j = soff; j < ssize; j++)
546 dst[j] += dst[j - soff];
555 src = s->picture.data[0];
556 for(j = 0; j < s->height; j++){
557 for(i = 0; i < s->picture.linesize[0]; i++)
558 src[i] = 255 - src[i];
559 src += s->picture.linesize[0];
562 *picture= *(AVFrame*)&s->picture;
563 *data_size = sizeof(AVPicture);
568 static av_cold int tiff_init(AVCodecContext *avctx){
569 TiffContext *s = avctx->priv_data;
574 avcodec_get_frame_defaults((AVFrame*)&s->picture);
575 avctx->coded_frame= (AVFrame*)&s->picture;
576 ff_lzw_decode_open(&s->lzw);
577 ff_ccitt_unpack_init();
582 static av_cold int tiff_end(AVCodecContext *avctx)
584 TiffContext * const s = avctx->priv_data;
586 ff_lzw_decode_close(&s->lzw);
587 if(s->picture.data[0])
588 avctx->release_buffer(avctx, &s->picture);
592 AVCodec tiff_decoder = {
603 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),