Statistics
| Branch: | Revision:

ffmpeg / libavcodec / ac3_parser.h @ 998d9ee7

History | View | Annotate | Download (1.55 KB)

1
/*
2
 * AC-3 parser prototypes
3
 * Copyright (c) 2003 Fabrice Bellard
4
 * Copyright (c) 2003 Michael Niedermayer
5
 *
6
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
13
 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * Lesser General Public License for more details.
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
19
 * License along with FFmpeg; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22

    
23
#ifndef AVCODEC_AC3_PARSER_H
24
#define AVCODEC_AC3_PARSER_H
25

    
26
#include "ac3.h"
27
#include "get_bits.h"
28

    
29
/**
30
 * Parse AC-3 frame header.
31
 * Parse the header up to the lfeon element, which is the first 52 or 54 bits
32
 * depending on the audio coding mode.
33
 * @param[in]  gbc BitContext containing the first 54 bits of the frame.
34
 * @param[out] hdr Pointer to struct where header info is written.
35
 * @return Returns 0 on success, -1 if there is a sync word mismatch,
36
 * -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate)
37
 * element is invalid, or -4 if the frmsizecod (bit rate) element is invalid.
38
 */
39
int ff_ac3_parse_header(GetBitContext *gbc, AC3HeaderInfo *hdr);
40

    
41
#endif /* AVCODEC_AC3_PARSER_H */