2 * AC3 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
29 * Parses AC-3 frame header.
30 * Parses the header up to the lfeon element, which is the first 52 or 54 bits
31 * depending on the audio coding mode.
32 * @param buf[in] Array containing the first 7 bytes of the frame.
33 * @param hdr[out] Pointer to struct where header info is written.
34 * @return Returns 0 on success, -1 if there is a sync word mismatch,
35 * -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate)
36 * element is invalid, or -4 if the frmsizecod (bit rate) element is invalid.
38 int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr);
40 #endif /* AC3_PARSER_H */