| /* |
| * |
| * 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); |
| |
| 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, size_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 */ |