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"
28 #include "libavutil/dict.h"
32 int ff_sauce_read(AVFormatContext *avctx, uint64_t *fsize, int *got_width, int get_height)
34 AVIOContext *pb = avctx->pb;
36 int datatype, filetype, t1, t2, nb_comments;
37 uint64_t start_pos = avio_size(pb) - 128;
39 avio_seek(pb, start_pos, SEEK_SET);
40 if (avio_read(pb, buf, 7) != 7)
42 if (memcmp(buf, "SAUCE00", 7))
45 #define GET_SAUCE_META(name,size) \
46 if (avio_read(pb, buf, size) == size && buf[0]) { \
48 av_dict_set(&avctx->metadata, name, buf, 0); \
51 GET_SAUCE_META("title", 35)
52 GET_SAUCE_META("artist", 20)
53 GET_SAUCE_META("publisher", 20)
54 GET_SAUCE_META("date", 8)
56 datatype = avio_r8(pb);
57 filetype = avio_r8(pb);
60 nb_comments = avio_r8(pb);
61 avio_skip(pb, 1); /* flags */
63 GET_SAUCE_META("encoder", 22);
65 if (got_width && datatype && filetype) {
66 if ((datatype == 1 && filetype <=2) || (datatype == 5 && filetype == 255) || datatype == 6) {
68 avctx->streams[0]->codec->width = t1<<3;
72 avctx->streams[0]->codec->height = t2<<4;
73 } else if (datatype == 5) {
75 avctx->streams[0]->codec->width = (filetype == 1 ? t1 : filetype) << 4;
79 avctx->streams[0]->codec->height = t2<<4;
85 if (nb_comments > 0) {
86 avio_seek(pb, start_pos - 64*nb_comments - 5, SEEK_SET);
87 if (avio_read(pb, buf, 5) == 5 && !memcmp(buf, "COMNT", 5)) {
89 char *str = av_malloc(65*nb_comments + 1);
90 *fsize -= 64*nb_comments + 5;
93 for (i = 0; i < nb_comments; i++) {
94 if (avio_read(pb, str + 65*i, 64) != 64)
96 str[65*i + 64] = '\n';
99 av_dict_set(&avctx->metadata, "comment", str, AV_DICT_DONT_STRDUP_VAL);