1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
*
* Bluetooth low-complexity, subband codec (SBC) library
*
* Copyright (C) 2004-2008 Marcel Holtmann <marcel@holtmann.org>
* Copyright (C) 2004-2005 Henryk Ploetz <henryk@ploetzli.ch>
* Copyright (C) 2005-2006 Brad Midgley <bmidgley@xmission.com>
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef __SBC_H
#define __SBC_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
/* sampling frequency */
#define SBC_FREQ_16000 0x00
#define SBC_FREQ_32000 0x01
#define SBC_FREQ_44100 0x02
#define SBC_FREQ_48000 0x03
/* blocks */
#define SBC_BLK_4 0x00
#define SBC_BLK_8 0x01
#define SBC_BLK_12 0x02
#define SBC_BLK_16 0x03
/* channel mode */
#define SBC_MODE_MONO 0x00
#define SBC_MODE_DUAL_CHANNEL 0x01
#define SBC_MODE_STEREO 0x02
#define SBC_MODE_JOINT_STEREO 0x03
/* allocation method */
#define SBC_AM_LOUDNESS 0x00
#define SBC_AM_SNR 0x01
/* subbands */
#define SBC_SB_4 0x00
#define SBC_SB_8 0x01
/* Data endianess */
#define SBC_LE 0x00
#define SBC_BE 0x01
struct sbc_struct {
unsigned long flags;
uint8_t frequency;
uint8_t blocks;
uint8_t subbands;
uint8_t mode;
uint8_t allocation;
uint8_t bitpool;
uint8_t endian;
void *priv;
};
typedef struct sbc_struct sbc_t;
int sbc_init(sbc_t *sbc, unsigned long flags);
int sbc_reinit(sbc_t *sbc, unsigned long flags);
int sbc_parse(sbc_t *sbc, void *input, int input_len);
int sbc_decode(sbc_t *sbc, void *input, int input_len, void *output,
int output_len, int *len);
int sbc_encode(sbc_t *sbc, void *input, int input_len, void *output,
int output_len, int *written);
int sbc_get_frame_length(sbc_t *sbc);
int sbc_get_frame_duration(sbc_t *sbc);
int sbc_get_codesize(sbc_t *sbc);
void sbc_finish(sbc_t *sbc);
#ifdef __cplusplus
}
#endif
#endif /* __SBC_H */
|
