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);
78 static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
79 int c, line, pixels, code;
80 const uint8_t *ssrc = src;
81 int width = s->width * s->bpp >> 3;
83 uint8_t *zbuf; unsigned long outlen;
85 if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
86 outlen = width * lines;
87 zbuf = av_malloc(outlen);
88 if(uncompress(zbuf, &outlen, src, size) != Z_OK){
89 av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu)\n", outlen, (unsigned long)width * lines);
94 for(line = 0; line < lines; line++){
95 memcpy(dst, src, width);
103 if(s->compr == TIFF_LZW){
104 if(ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0){
105 av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
109 if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
111 uint8_t *src2 = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
113 if(!src2 || (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE < (unsigned)size){
114 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
118 memcpy(src2, src, size);
120 for(i = 0; i < size; i++)
121 src2[i] = ff_reverse[src[i]];
123 memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
124 if(s->compr == TIFF_G3 && !(s->fax_opts & 1))
125 s->compr = TIFF_CCITT_RLE;
130 ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr);
136 for(line = 0; line < lines; line++){
137 if(src - ssrc > size){
138 av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
143 memcpy(dst, src, width);
147 for(pixels = 0; pixels < width;){
148 code = (int8_t)*src++;
151 if(pixels + code > width){
152 av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
155 memcpy(dst + pixels, src, code);
158 }else if(code != -128){ // -127..-1
160 if(pixels + code > width){
161 av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
165 memset(dst + pixels, c, code);
171 pixels = ff_lzw_decode(s->lzw, dst, width);
173 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
184 static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
186 int tag, type, count, off, value = 0;
189 const uint8_t *rp, *gp, *bp;
191 tag = tget_short(&buf, s->le);
192 type = tget_short(&buf, s->le);
193 count = tget_long(&buf, s->le);
194 off = tget_long(&buf, s->le);
201 value = tget(&buf, type, s->le);
217 }else if(type_sizes[type] * count <= 4){
223 if(buf && (buf < start || buf > end_buf)){
224 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
236 if(count == 1) s->bpp = value;
240 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
245 for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
252 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
255 switch(s->bpp*10 + count){
257 s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
260 s->avctx->pix_fmt = PIX_FMT_PAL8;
263 s->avctx->pix_fmt = PIX_FMT_RGB24;
266 s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
269 s->avctx->pix_fmt = PIX_FMT_RGBA;
272 s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
275 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
278 if(s->width != s->avctx->width || s->height != s->avctx->height){
279 if(avcodec_check_dimensions(s->avctx, s->width, s->height))
281 avcodec_set_dimensions(s->avctx, s->width, s->height);
283 if(s->picture.data[0])
284 s->avctx->release_buffer(s->avctx, &s->picture);
285 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
286 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
290 /* make default grayscale pal */
291 pal = (uint32_t *) s->picture.data[1];
292 for(i = 0; i < 256; i++)
293 pal[i] = i * 0x010101;
310 case TIFF_ADOBE_DEFLATE:
314 av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
319 av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
322 av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
326 case TIFF_ROWSPERSTRIP:
327 if(type == TIFF_LONG && value == -1)
328 value = s->avctx->height;
330 av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
335 case TIFF_STRIP_OFFS:
340 s->stripdata = start + off;
342 if(s->strips == 1) s->rps = s->height;
344 if(s->stripdata > end_buf){
345 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
349 case TIFF_STRIP_SIZE:
351 s->stripsizes = NULL;
352 s->stripsize = value;
355 s->stripsizes = start + off;
359 if(s->stripsizes > end_buf){
360 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
365 s->predictor = value;
379 av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
383 case TIFF_FILL_ORDER:
384 if(value < 1 || value > 2){
385 av_log(s->avctx, AV_LOG_ERROR, "Unknown FillOrder value %d, trying default one\n", value);
388 s->fill_order = value - 1;
391 if(s->avctx->pix_fmt != PIX_FMT_PAL8){
392 av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
395 pal = (uint32_t *) s->picture.data[1];
396 off = type_sizes[type];
398 gp = buf + count / 3 * off;
399 bp = buf + count / 3 * off * 2;
400 off = (type_sizes[type] - 1) << 3;
401 for(i = 0; i < count / 3; i++){
402 j = (tget(&rp, type, s->le) >> off) << 16;
403 j |= (tget(&gp, type, s->le) >> off) << 8;
404 j |= tget(&bp, type, s->le) >> off;
410 av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
422 static int decode_frame(AVCodecContext *avctx,
423 void *data, int *data_size,
426 const uint8_t *buf = avpkt->data;
427 int buf_size = avpkt->size;
428 TiffContext * const s = avctx->priv_data;
429 AVFrame *picture = data;
430 AVFrame * const p= (AVFrame*)&s->picture;
431 const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
434 int stride, soff, ssize;
438 id = AV_RL16(buf); buf += 2;
439 if(id == 0x4949) le = 1;
440 else if(id == 0x4D4D) le = 0;
442 av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
449 // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
450 // that further identifies the file as a TIFF file"
451 if(tget_short(&buf, le) != 42){
452 av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
455 /* parse image file directory */
456 off = tget_long(&buf, le);
457 if(orig_buf + off + 14 >= end_buf){
458 av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
461 buf = orig_buf + off;
462 entries = tget_short(&buf, le);
463 for(i = 0; i < entries; i++){
464 if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
468 if(!s->stripdata && !s->stripoff){
469 av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
472 /* now we have the data and may start decoding */
474 av_log(s->avctx, AV_LOG_ERROR, "Picture initialization missing\n");
477 if(s->strips == 1 && !s->stripsize){
478 av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
479 s->stripsize = buf_size - s->stripoff;
481 stride = p->linesize[0];
483 for(i = 0; i < s->height; i += s->rps){
485 ssize = tget(&s->stripsizes, s->sstype, s->le);
487 ssize = s->stripsize;
490 soff = tget(&s->stripdata, s->sot, s->le);
493 if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
495 dst += s->rps * stride;
497 if(s->predictor == 2){
500 ssize = s->width * soff;
501 for(i = 0; i < s->height; i++) {
502 for(j = soff; j < ssize; j++)
503 dst[j] += dst[j - soff];
512 src = s->picture.data[0];
513 for(j = 0; j < s->height; j++){
514 for(i = 0; i < s->picture.linesize[0]; i++)
515 src[i] = 255 - src[i];
516 src += s->picture.linesize[0];
519 *picture= *(AVFrame*)&s->picture;
520 *data_size = sizeof(AVPicture);
525 static av_cold int tiff_init(AVCodecContext *avctx){
526 TiffContext *s = avctx->priv_data;
531 avcodec_get_frame_defaults((AVFrame*)&s->picture);
532 avctx->coded_frame= (AVFrame*)&s->picture;
533 ff_lzw_decode_open(&s->lzw);
534 ff_ccitt_unpack_init();
539 static av_cold int tiff_end(AVCodecContext *avctx)
541 TiffContext * const s = avctx->priv_data;
543 ff_lzw_decode_close(&s->lzw);
544 if(s->picture.data[0])
545 avctx->release_buffer(avctx, &s->picture);
549 AVCodec tiff_decoder = {
560 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),