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/*
*
* Bluetooth low-complexity, subband codec (SBC) library
*
* Copyright (C) 2008-2010 Nokia Corporation
* Copyright (C) 2004-2010 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>
#include <sys/types.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;
void *priv_alloc_base;
};
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_init_msbc(sbc_t *sbc, unsigned long flags);
int sbc_init_a2dp(sbc_t *sbc, unsigned long flags,
const void *conf, size_t conf_len);
ssize_t sbc_parse(sbc_t *sbc, const void *input, size_t input_len);
/* Decodes ONE input block into ONE output block */
ssize_t sbc_decode(sbc_t *sbc, const void *input, size_t input_len,
void *output, size_t output_len, size_t *written);
/* Encodes ONE input block into ONE output block */
ssize_t sbc_encode(sbc_t *sbc, const void *input, size_t input_len,
void *output, size_t output_len, ssize_t *written);
/* Returns the output block size in bytes */
size_t sbc_get_frame_length(sbc_t *sbc);
/* Returns the time one input/output block takes to play in msec*/
unsigned sbc_get_frame_duration(sbc_t *sbc);
/* Returns the input block size in bytes */
size_t sbc_get_codesize(sbc_t *sbc);
const char *sbc_get_implementation_info(sbc_t *sbc);
void sbc_finish(sbc_t *sbc);
#ifdef __cplusplus
}
#endif
#endif /* __SBC_H */