1 /*
2 * AC-3 parser internal code
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef AVCODEC_AC3_PARSER_INTERNAL_H
22 #define AVCODEC_AC3_PARSER_INTERNAL_H
23
24 #include <stddef.h>
25 #include <stdint.h>
26
29
30 /**
31 * @struct AC3HeaderInfo
32 * Coded AC-3 header values up to the lfeon element, plus derived values.
33 */
35 /** @name Coded elements
36 * @{
37 */
53 /** @} */
54
55 /** @name Derived values
56 * @{
57 */
65 /** @} */
66
67 /** @name enhanced eac3 extension coded elements
68 * @{
69 */
82 /** @} */
84
94
95 /**
96 * Parse AC-3 frame header.
97 * Parse the header up to the lfeon element, which is the first 52 or 54 bits
98 * depending on the audio coding mode.
99 * @param[in] gbc BitContext containing the first 54 bits of the frame.
100 * @param[out] hdr Pointer to struct where header info is written.
101 * @return 0 on success and AC3_PARSE_ERROR_* values otherwise.
102 */
104
107
109
110 #endif /* AVCODEC_AC3_PARSER_INTERNAL_H */