3 * Bluetooth low-complexity, subband codec (SBC) library
5 * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
6 * Copyright (C) 2004-2005 Henryk Ploetz <henryk@ploetzli.ch>
7 * Copyright (C) 2005-2006 Brad Midgley <bmidgley@xmission.com>
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
34 #include <sys/types.h>
36 /* sampling frequency */
37 #define SBC_FREQ_16000 0x00
38 #define SBC_FREQ_32000 0x01
39 #define SBC_FREQ_44100 0x02
40 #define SBC_FREQ_48000 0x03
43 #define SBC_BLK_4 0x00
44 #define SBC_BLK_8 0x01
45 #define SBC_BLK_12 0x02
46 #define SBC_BLK_16 0x03
49 #define SBC_MODE_MONO 0x00
50 #define SBC_MODE_DUAL_CHANNEL 0x01
51 #define SBC_MODE_STEREO 0x02
52 #define SBC_MODE_JOINT_STEREO 0x03
54 /* allocation method */
55 #define SBC_AM_LOUDNESS 0x00
56 #define SBC_AM_SNR 0x01
78 void *priv_alloc_base;
81 typedef struct sbc_struct sbc_t;
83 int sbc_init(sbc_t *sbc, unsigned long flags);
84 int sbc_reinit(sbc_t *sbc, unsigned long flags);
86 ssize_t sbc_parse(sbc_t *sbc, const void *input, size_t input_len);
88 /* Decodes ONE input block into ONE output block */
89 ssize_t sbc_decode(sbc_t *sbc, const void *input, size_t input_len,
90 void *output, size_t output_len, size_t *written);
92 /* Encodes ONE input block into ONE output block */
93 ssize_t sbc_encode(sbc_t *sbc, const void *input, size_t input_len,
94 void *output, size_t output_len, size_t *written);
96 /* Returns the output block size in bytes */
97 size_t sbc_get_frame_length(sbc_t *sbc);
99 /* Returns the time one input/output block takes to play in msec*/
100 unsigned sbc_get_frame_duration(sbc_t *sbc);
102 /* Returns the input block size in bytes */
103 size_t sbc_get_codesize(sbc_t *sbc);
105 const char *sbc_get_implementation_info(sbc_t *sbc);
106 void sbc_finish(sbc_t *sbc);