2 * AC-3 parser prototypes
3 * Copyright (c) 2003 Fabrice Bellard
4 * Copyright (c) 2003 Michael Niedermayer
6 * This file is part of FFmpeg.
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.
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.
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
23 #ifndef AVCODEC_AC3_PARSER_H
24 #define AVCODEC_AC3_PARSER_H
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.
40 int avpriv_ac3_parse_header2(GetBitContext
*gbc
, AC3HeaderInfo
**hdr
);
42 int avpriv_ac3_parse_header(GetBitContext
*gbc
, AC3HeaderInfo
*hdr
);
44 #endif /* AVCODEC_AC3_PARSER_H */