3 * Copyright (c) 2010 Peter Ross <pross@xvid.org>
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
27 #include "libavutil/intreadwrite.h"
31 int ff_sauce_read(AVFormatContext *avctx, uint64_t *fsize, int *got_width, int get_height)
33 AVIOContext *pb = avctx->pb;
35 int datatype, filetype, t1, t2, nb_comments, flags;
36 uint64_t start_pos = avio_size(pb) - 128;
38 avio_seek(pb, start_pos, SEEK_SET);
39 if (avio_read(pb, buf, 7) != 7)
41 if (memcmp(buf, "SAUCE00", 7))
44 #define GET_SAUCE_META(name,size) \
45 if (avio_read(pb, buf, size) == size && buf[0]) { \
47 av_metadata_set2(&avctx->metadata, name, buf, 0); \
50 GET_SAUCE_META("title", 35)
51 GET_SAUCE_META("artist", 20)
52 GET_SAUCE_META("publisher", 20)
53 GET_SAUCE_META("date", 8)
55 datatype = avio_r8(pb);
56 filetype = avio_r8(pb);
59 nb_comments = avio_r8(pb);
62 GET_SAUCE_META("encoder", 22);
64 if (got_width && datatype && filetype) {
65 if ((datatype == 1 && filetype <=2) || (datatype == 5 && filetype == 255) || datatype == 6) {
67 avctx->streams[0]->codec->width = t1<<3;
71 avctx->streams[0]->codec->height = t2<<4;
72 } else if (datatype == 5) {
74 avctx->streams[0]->codec->width = (filetype == 1 ? t1 : filetype) << 4;
78 avctx->streams[0]->codec->height = t2<<4;
84 if (nb_comments > 0) {
85 avio_seek(pb, start_pos - 64*nb_comments - 5, SEEK_SET);
86 if (avio_read(pb, buf, 5) == 5 && !memcmp(buf, "COMNT", 5)) {
88 char *str = av_malloc(65*nb_comments + 1);
89 *fsize -= 64*nb_comments + 5;
92 for (i = 0; i < nb_comments; i++) {
93 if (avio_read(pb, str + 65*i, 64) != 64)
95 str[65*i + 64] = '\n';
98 av_metadata_set2(&avctx->metadata, "comment", str, AV_METADATA_DONT_STRDUP_VAL);