FFmpeg
vorbis_parser_internal.h
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1 /*
2  * Copyright (c) 2012 Justin Ruggles
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * Vorbis audio parser
24  *
25  * Determines the duration for each packet.
26  */
27 
28 #ifndef AVCODEC_VORBIS_PARSER_INTERNAL_H
29 #define AVCODEC_VORBIS_PARSER_INTERNAL_H
30 
31 #include "avcodec.h"
32 #include "vorbis_parser.h"
33 
35  const AVClass *class;
36  int extradata_parsed; ///< we have attempted to parse extradata
37  int valid_extradata; ///< extradata is valid, so we can calculate duration
38  int blocksize[2]; ///< short and long window sizes
39  int previous_blocksize; ///< previous window size
40  int mode_blocksize[64]; ///< window size mapping for each mode
41  int mode_count; ///< number of modes
42  int mode_mask; ///< bitmask used to get the mode in each packet
43  int prev_mask; ///< bitmask used to get the previous mode flag in each packet
44 };
45 
46 #endif /* AVCODEC_VORBIS_PARSER_INTERNAL_H */
int extradata_parsed
we have attempted to parse extradata
int mode_count
number of modes
int prev_mask
bitmask used to get the previous mode flag in each packet
A public API for Vorbis parsing.
int valid_extradata
extradata is valid, so we can calculate duration
int previous_blocksize
previous window size
int mode_mask
bitmask used to get the mode in each packet
Libavcodec external API header.
Describe the class of an AVClass context structure.
Definition: log.h:67
int blocksize[2]
short and long window sizes
int mode_blocksize[64]
window size mapping for each mode