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;
48 int strips, rps, sstype;
50 const uint8_t* stripdata;
51 const uint8_t* stripsizes;
52 int stripsize, stripoff;
56 static int tget_short(const uint8_t **p, int le){
57 int v = le ? AV_RL16(*p) : AV_RB16(*p);
62 static int tget_long(const uint8_t **p, int le){
63 int v = le ? AV_RL32(*p) : AV_RB32(*p);
68 static int tget(const uint8_t **p, int type, int le){
70 case TIFF_BYTE : return *(*p)++;
71 case TIFF_SHORT: return tget_short(p, le);
72 case TIFF_LONG : return tget_long (p, le);
77 static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
78 int c, line, pixels, code;
79 const uint8_t *ssrc = src;
80 int width = s->width * s->bpp >> 3;
82 uint8_t *zbuf; unsigned long outlen;
84 if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
85 outlen = width * lines;
86 zbuf = av_malloc(outlen);
87 if(uncompress(zbuf, &outlen, src, size) != Z_OK){
88 av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu)\n", outlen, (unsigned long)width * lines);
93 for(line = 0; line < lines; line++){
94 memcpy(dst, src, width);
102 if(s->compr == TIFF_LZW){
103 if(ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0){
104 av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
108 if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
110 uint8_t *src2 = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
112 if(!src2 || (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE < (unsigned)size){
113 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
116 for(i = 0; i < size; i++)
117 src2[i] = ff_reverse[src[i]];
118 memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
119 if(s->compr == TIFF_G3 && !(s->fax_opts & 1))
120 s->compr = TIFF_CCITT_RLE;
125 ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr);
131 for(line = 0; line < lines; line++){
132 if(src - ssrc > size){
133 av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
138 memcpy(dst, src, width);
142 for(pixels = 0; pixels < width;){
143 code = (int8_t)*src++;
146 if(pixels + code > width){
147 av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
150 memcpy(dst + pixels, src, code);
153 }else if(code != -128){ // -127..-1
155 if(pixels + code > width){
156 av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
160 memset(dst + pixels, c, code);
166 pixels = ff_lzw_decode(s->lzw, dst, width);
168 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
179 static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
181 int tag, type, count, off, value = 0;
184 const uint8_t *rp, *gp, *bp;
186 tag = tget_short(&buf, s->le);
187 type = tget_short(&buf, s->le);
188 count = tget_long(&buf, s->le);
189 off = tget_long(&buf, s->le);
196 value = tget(&buf, type, s->le);
212 }else if(type_sizes[type] * count <= 4){
218 if(buf && (buf < start || buf > end_buf)){
219 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
231 if(count == 1) s->bpp = value;
235 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
240 for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
247 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
250 switch(s->bpp*10 + count){
252 s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
255 s->avctx->pix_fmt = PIX_FMT_PAL8;
258 s->avctx->pix_fmt = PIX_FMT_RGB24;
261 s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
264 s->avctx->pix_fmt = PIX_FMT_RGBA;
267 s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
270 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
273 if(s->width != s->avctx->width || s->height != s->avctx->height){
274 if(avcodec_check_dimensions(s->avctx, s->width, s->height))
276 avcodec_set_dimensions(s->avctx, s->width, s->height);
278 if(s->picture.data[0])
279 s->avctx->release_buffer(s->avctx, &s->picture);
280 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
281 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
285 /* make default grayscale pal */
286 pal = (uint32_t *) s->picture.data[1];
287 for(i = 0; i < 256; i++)
288 pal[i] = i * 0x010101;
305 case TIFF_ADOBE_DEFLATE:
309 av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
314 av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
317 av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
321 case TIFF_ROWSPERSTRIP:
322 if(type == TIFF_LONG && value == -1)
323 value = s->avctx->height;
325 av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
330 case TIFF_STRIP_OFFS:
335 s->stripdata = start + off;
337 if(s->strips == 1) s->rps = s->height;
339 if(s->stripdata > end_buf){
340 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
344 case TIFF_STRIP_SIZE:
346 s->stripsizes = NULL;
347 s->stripsize = value;
350 s->stripsizes = start + off;
354 if(s->stripsizes > end_buf){
355 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
360 s->predictor = value;
374 av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
379 if(s->avctx->pix_fmt != PIX_FMT_PAL8){
380 av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
383 pal = (uint32_t *) s->picture.data[1];
384 off = type_sizes[type];
386 gp = buf + count / 3 * off;
387 bp = buf + count / 3 * off * 2;
388 off = (type_sizes[type] - 1) << 3;
389 for(i = 0; i < count / 3; i++){
390 j = (tget(&rp, type, s->le) >> off) << 16;
391 j |= (tget(&gp, type, s->le) >> off) << 8;
392 j |= tget(&bp, type, s->le) >> off;
398 av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
410 static int decode_frame(AVCodecContext *avctx,
411 void *data, int *data_size,
414 const uint8_t *buf = avpkt->data;
415 int buf_size = avpkt->size;
416 TiffContext * const s = avctx->priv_data;
417 AVFrame *picture = data;
418 AVFrame * const p= (AVFrame*)&s->picture;
419 const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
422 int stride, soff, ssize;
426 id = AV_RL16(buf); buf += 2;
427 if(id == 0x4949) le = 1;
428 else if(id == 0x4D4D) le = 0;
430 av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
436 // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
437 // that further identifies the file as a TIFF file"
438 if(tget_short(&buf, le) != 42){
439 av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
442 /* parse image file directory */
443 off = tget_long(&buf, le);
444 if(orig_buf + off + 14 >= end_buf){
445 av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
448 buf = orig_buf + off;
449 entries = tget_short(&buf, le);
450 for(i = 0; i < entries; i++){
451 if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
455 if(!s->stripdata && !s->stripoff){
456 av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
459 /* now we have the data and may start decoding */
461 av_log(s->avctx, AV_LOG_ERROR, "Picture initialization missing\n");
464 if(s->strips == 1 && !s->stripsize){
465 av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
466 s->stripsize = buf_size - s->stripoff;
468 stride = p->linesize[0];
470 for(i = 0; i < s->height; i += s->rps){
472 ssize = tget(&s->stripsizes, s->sstype, s->le);
474 ssize = s->stripsize;
477 soff = tget(&s->stripdata, s->sot, s->le);
480 if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
482 dst += s->rps * stride;
484 if(s->predictor == 2){
487 ssize = s->width * soff;
488 for(i = 0; i < s->height; i++) {
489 for(j = soff; j < ssize; j++)
490 dst[j] += dst[j - soff];
499 src = s->picture.data[0];
500 for(j = 0; j < s->height; j++){
501 for(i = 0; i < s->picture.linesize[0]; i++)
502 src[i] = 255 - src[i];
503 src += s->picture.linesize[0];
506 *picture= *(AVFrame*)&s->picture;
507 *data_size = sizeof(AVPicture);
512 static av_cold int tiff_init(AVCodecContext *avctx){
513 TiffContext *s = avctx->priv_data;
518 avcodec_get_frame_defaults((AVFrame*)&s->picture);
519 avctx->coded_frame= (AVFrame*)&s->picture;
520 ff_lzw_decode_open(&s->lzw);
521 ff_ccitt_unpack_init();
526 static av_cold int tiff_end(AVCodecContext *avctx)
528 TiffContext * const s = avctx->priv_data;
530 ff_lzw_decode_close(&s->lzw);
531 if(s->picture.data[0])
532 avctx->release_buffer(avctx, &s->picture);
536 AVCodec tiff_decoder = {
547 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),