Add FFMPEG_ prefix to all multiple inclusion guards.
[libav.git] / libavcodec / ac3_parser.h
1 /*
2 * AC3 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 FFMPEG_AC3_PARSER_H
24 #define FFMPEG_AC3_PARSER_H
25
26 #include "ac3.h"
27
28 typedef enum {
29 AC3_PARSE_ERROR_SYNC = -1,
30 AC3_PARSE_ERROR_BSID = -2,
31 AC3_PARSE_ERROR_SAMPLE_RATE = -3,
32 AC3_PARSE_ERROR_FRAME_SIZE = -4,
33 } AC3ParseError;
34
35 /**
36 * Parses AC-3 frame header.
37 * Parses the header up to the lfeon element, which is the first 52 or 54 bits
38 * depending on the audio coding mode.
39 * @param buf[in] Array containing the first 7 bytes of the frame.
40 * @param hdr[out] Pointer to struct where header info is written.
41 * @return Returns 0 on success, -1 if there is a sync word mismatch,
42 * -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate)
43 * element is invalid, or -4 if the frmsizecod (bit rate) element is invalid.
44 */
45 int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr);
46
47 #endif /* FFMPEG_AC3_PARSER_H */