0,0 → 1,104 |
/* |
* SAUCE header parser |
* Copyright (c) 2010 Peter Ross <pross@xvid.org> |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
/** |
* @file |
* SAUCE header parser |
*/ |
|
#include "libavutil/intreadwrite.h" |
#include "libavutil/dict.h" |
#include "avformat.h" |
#include "sauce.h" |
|
int ff_sauce_read(AVFormatContext *avctx, uint64_t *fsize, int *got_width, int get_height) |
{ |
AVIOContext *pb = avctx->pb; |
char buf[36]; |
int datatype, filetype, t1, t2, nb_comments; |
uint64_t start_pos = avio_size(pb) - 128; |
|
avio_seek(pb, start_pos, SEEK_SET); |
if (avio_read(pb, buf, 7) != 7) |
return -1; |
if (memcmp(buf, "SAUCE00", 7)) |
return -1; |
|
#define GET_SAUCE_META(name,size) \ |
if (avio_read(pb, buf, size) == size && buf[0]) { \ |
buf[size] = 0; \ |
av_dict_set(&avctx->metadata, name, buf, 0); \ |
} |
|
GET_SAUCE_META("title", 35) |
GET_SAUCE_META("artist", 20) |
GET_SAUCE_META("publisher", 20) |
GET_SAUCE_META("date", 8) |
avio_skip(pb, 4); |
datatype = avio_r8(pb); |
filetype = avio_r8(pb); |
t1 = avio_rl16(pb); |
t2 = avio_rl16(pb); |
nb_comments = avio_r8(pb); |
avio_skip(pb, 1); /* flags */ |
avio_skip(pb, 4); |
GET_SAUCE_META("encoder", 22); |
|
if (got_width && datatype && filetype) { |
if ((datatype == 1 && filetype <=2) || (datatype == 5 && filetype == 255) || datatype == 6) { |
if (t1) { |
avctx->streams[0]->codec->width = t1<<3; |
*got_width = 1; |
} |
if (get_height && t2) |
avctx->streams[0]->codec->height = t2<<4; |
} else if (datatype == 5) { |
if (filetype) { |
avctx->streams[0]->codec->width = (filetype == 1 ? t1 : filetype) << 4; |
*got_width = 1; |
} |
if (get_height && t2) |
avctx->streams[0]->codec->height = t2<<4; |
} |
} |
|
*fsize -= 128; |
|
if (nb_comments > 0) { |
avio_seek(pb, start_pos - 64*nb_comments - 5, SEEK_SET); |
if (avio_read(pb, buf, 5) == 5 && !memcmp(buf, "COMNT", 5)) { |
int i; |
char *str = av_malloc(65*nb_comments + 1); |
*fsize -= 64*nb_comments + 5; |
if (!str) |
return 0; |
for (i = 0; i < nb_comments; i++) { |
if (avio_read(pb, str + 65*i, 64) != 64) |
break; |
str[65*i + 64] = '\n'; |
} |
str[65*i] = 0; |
av_dict_set(&avctx->metadata, "comment", str, AV_DICT_DONT_STRDUP_VAL); |
} |
} |
|
return 0; |
} |