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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 Pointer to struct where header info is written. | |
35 | * will be allocated if NULL | |
36 | * @return Returns 0 on success, -1 if there is a sync word mismatch, | |
37 | * -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate) | |
38 | * element is invalid, or -4 if the frmsizecod (bit rate) element is invalid. | |
39 | */ | |
40 | int avpriv_ac3_parse_header2(GetBitContext *gbc, AC3HeaderInfo **hdr); | |
41 | ||
42 | int avpriv_ac3_parse_header(GetBitContext *gbc, AC3HeaderInfo *hdr); | |
43 | ||
44 | #endif /* AVCODEC_AC3_PARSER_H */ |