3 * Bluetooth low-complexity, subband codec (SBC) library
5 * Copyright (C) 2008-2010 Nokia Corporation
6 * Copyright (C) 2012-2014 Intel Corporation
7 * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
8 * Copyright (C) 2004-2005 Henryk Ploetz <henryk@ploetzli.ch>
9 * Copyright (C) 2005-2006 Brad Midgley <bmidgley@xmission.com>
12 * This library is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU Lesser General Public
14 * License as published by the Free Software Foundation; either
15 * version 2.1 of the License, or (at your option) any later version.
17 * This library is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * Lesser General Public License for more details.
22 * You should have received a copy of the GNU Lesser General Public
23 * License along with this library; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
36 #include <sys/types.h>
38 /* sampling frequency */
39 #define SBC_FREQ_16000 0x00
40 #define SBC_FREQ_32000 0x01
41 #define SBC_FREQ_44100 0x02
42 #define SBC_FREQ_48000 0x03
45 #define SBC_BLK_4 0x00
46 #define SBC_BLK_8 0x01
47 #define SBC_BLK_12 0x02
48 #define SBC_BLK_16 0x03
51 #define SBC_MODE_MONO 0x00
52 #define SBC_MODE_DUAL_CHANNEL 0x01
53 #define SBC_MODE_STEREO 0x02
54 #define SBC_MODE_JOINT_STEREO 0x03
56 /* allocation method */
57 #define SBC_AM_LOUDNESS 0x00
58 #define SBC_AM_SNR 0x01
80 void *priv_alloc_base;
83 typedef struct sbc_struct sbc_t;
85 int sbc_init(sbc_t *sbc, unsigned long flags);
86 int sbc_reinit(sbc_t *sbc, unsigned long flags);
87 int sbc_init_msbc(sbc_t *sbc, unsigned long flags);
88 int sbc_init_a2dp(sbc_t *sbc, unsigned long flags,
89 const void *conf, size_t conf_len);
91 ssize_t sbc_parse(sbc_t *sbc, const void *input, size_t input_len);
93 /* Decodes ONE input block into ONE output block */
94 ssize_t sbc_decode(sbc_t *sbc, const void *input, size_t input_len,
95 void *output, size_t output_len, size_t *written);
97 /* Encodes ONE input block into ONE output block */
98 ssize_t sbc_encode(sbc_t *sbc, const void *input, size_t input_len,
99 void *output, size_t output_len, ssize_t *written);
101 /* Returns the output block size in bytes */
102 size_t sbc_get_frame_length(sbc_t *sbc);
104 /* Returns the time one input/output block takes to play in msec*/
105 unsigned sbc_get_frame_duration(sbc_t *sbc);
107 /* Returns the input block size in bytes */
108 size_t sbc_get_codesize(sbc_t *sbc);
110 const char *sbc_get_implementation_info(sbc_t *sbc);
111 void sbc_finish(sbc_t *sbc);