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ac3_parser_internal.h
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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 "ac3.h"
25 #include "get_bits.h"
26 
27 /**
28  * Parse AC-3 frame header.
29  * Parse the header up to the lfeon element, which is the first 52 or 54 bits
30  * depending on the audio coding mode.
31  * @param[in] gbc BitContext containing the first 54 bits of the frame.
32  * @param[out] hdr Pointer to struct where header info is written.
33  * @return Returns 0 on success, -1 if there is a sync word mismatch,
34  * -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate)
35  * element is invalid, or -4 if the frmsizecod (bit rate) element is invalid.
36  */
38 
40  size_t size);
41 
42 #endif /* AVCODEC_AC3_PARSER_INTERNAL_H */
int ff_ac3_parse_header(GetBitContext *gbc, AC3HeaderInfo *hdr)
Parse AC-3 frame header.
uint8_t
bitstream reader API header.
ptrdiff_t size
Definition: opengl_enc.c:101
int avpriv_ac3_parse_header(AC3HeaderInfo **hdr, const uint8_t *buf, size_t size)
Definition: ac3_parser.c:245
Coded AC-3 header values up to the lfeon element, plus derived values.
Definition: ac3.h:176
void * buf
Definition: avisynth_c.h:690
Common code between the AC-3 encoder and decoder.