aacadtsdec.h
Go to the documentation of this file.
1 /*
2  * AAC ADTS header decoding prototypes and structures
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 AVCODEC_AACADTSDEC_H
24 #define AVCODEC_AACADTSDEC_H
25 
26 #include <stdint.h>
27 #include "get_bits.h"
28 
29 #define AAC_ADTS_HEADER_SIZE 7
30 
31 typedef struct AACADTSHeaderInfo {
32  uint32_t sample_rate;
33  uint32_t samples;
34  uint32_t bit_rate;
41 
42 /**
43  * Parse AAC frame header.
44  * Parse the ADTS frame header to the end of the variable header, which is
45  * the first 54 bits.
46  * @param[in] gbc BitContext containing the first 54 bits of the frame.
47  * @param[out] hdr Pointer to struct where header info is written.
48  * @return Returns 0 on success, -1 if there is a sync word mismatch,
49  * -2 if the version element is invalid, -3 if the sample rate
50  * element is invalid, or -4 if the bit rate element is invalid.
51  */
53 
54 #endif /* AVCODEC_AACADTSDEC_H */
uint8_t object_type
Definition: aacadtsdec.h:36
int avpriv_aac_parse_header(GetBitContext *gbc, AACADTSHeaderInfo *hdr)
Parse AAC frame header.
Definition: aacadtsdec.c:29
uint8_t
bitstream reader API header.
uint8_t sampling_index
Definition: aacadtsdec.h:37
uint8_t chan_config
Definition: aacadtsdec.h:38
uint8_t num_aac_frames
Definition: aacadtsdec.h:39
uint32_t samples
Definition: aacadtsdec.h:33
uint32_t bit_rate
Definition: aacadtsdec.h:34
struct AACADTSHeaderInfo AACADTSHeaderInfo
uint8_t crc_absent
Definition: aacadtsdec.h:35
uint32_t sample_rate
Definition: aacadtsdec.h:32