btstack_sbc.h File Reference

#include <stdint.h>
#include "btstack_sbc_plc.h"

Data Structures
struct	btstack_sbc_decoder_state_t
struct	btstack_sbc_encoder_state_t

Enumerations
enum	btstack_sbc_mode_t {   SBC_MODE_STANDARD,   SBC_MODE_mSBC }

Functions
void	btstack_sbc_decoder_init (btstack_sbc_decoder_state_t *state, btstack_sbc_mode_t mode, void(*callback)(int16_t *data, int num_samples, int num_channels, int sample_rate, void *context), void *context)
	Init SBC decoder. More...
int	btstack_sbc_decoder_num_channels (btstack_sbc_decoder_state_t *state)
int	btstack_sbc_decoder_num_samples_per_frame (btstack_sbc_decoder_state_t *state)
	Get number of samples per SBC frame. More...
void	btstack_sbc_decoder_process_data (btstack_sbc_decoder_state_t *state, int packet_status_flag, uint8_t *buffer, int size)
	Process received SCO data. More...
int	btstack_sbc_decoder_sample_rate (btstack_sbc_decoder_state_t *state)
void	btstack_sbc_decoder_test_disable_plc (void)
void	btstack_sbc_decoder_test_simulate_corrupt_frames (int period)
void	btstack_sbc_encoder_init (btstack_sbc_encoder_state_t *state, btstack_sbc_mode_t mode, int blocks, int subbands, int allocation_method, int sample_rate, int bitpool, int channel_mode)
	Init SBC encoder. More...
int	btstack_sbc_encoder_num_audio_frames (void)
	Return number of audio frames required for one SBC packet. More...
void	btstack_sbc_encoder_process_data (int16_t *input_buffer)
	Encode PCM data. More...
uint8_t *	btstack_sbc_encoder_sbc_buffer (void)
	Return SBC frame. More...
uint16_t	btstack_sbc_encoder_sbc_buffer_length (void)
	Return SBC frame length. More...

enum btstack_sbc_mode_t

Enumerator
SBC_MODE_STANDARD
SBC_MODE_mSBC

void btstack_sbc_decoder_init	(	btstack_sbc_decoder_state_t *	state,
		btstack_sbc_mode_t	mode,
		void(*)(int16_t *data, int num_samples, int num_channels, int sample_rate, void *context)	callback,
		void *	context
	)

Init SBC decoder.

Parameters

state
mode
callback	for decoded PCM data in host endianess
context	provided in callback

int btstack_sbc_decoder_num_channels

(

btstack_sbc_decoder_state_t *

state

)

int btstack_sbc_decoder_num_samples_per_frame

(

btstack_sbc_decoder_state_t *

state

)

Get number of samples per SBC frame.

void btstack_sbc_decoder_process_data	(	btstack_sbc_decoder_state_t *	state,
		int	packet_status_flag,
		uint8_t *	buffer,
		int	size
	)

Process received SCO data.

Parameters

state
packet_status_flag	from SCO packet: 0 = OK, 1 = possibly invalid data, 2 = no data received, 3 = data partially lost
buffer
size

int btstack_sbc_decoder_sample_rate

(

btstack_sbc_decoder_state_t *

state

)

void btstack_sbc_decoder_test_disable_plc

(

void

)

void btstack_sbc_decoder_test_simulate_corrupt_frames

(

int

period

)

void btstack_sbc_encoder_init	(	btstack_sbc_encoder_state_t *	state,
		btstack_sbc_mode_t	mode,
		int	blocks,
		int	subbands,
		int	allocation_method,
		int	sample_rate,
		int	bitpool,
		int	channel_mode
	)

Init SBC encoder.

Parameters

state
mode
blocks
subbands
allocation_method
sample_rate
bitpool
channel_mode

int btstack_sbc_encoder_num_audio_frames

(

void

)

Return number of audio frames required for one SBC packet.

Note

each audio frame contains 2 sample values in stereo modes

void btstack_sbc_encoder_process_data

(

int16_t *

input_buffer

)

Encode PCM data.

Parameters

buffer

with samples in host endianess

uint8_t* btstack_sbc_encoder_sbc_buffer

(

void

)

Return SBC frame.

uint16_t btstack_sbc_encoder_sbc_buffer_length

(

void

)

Return SBC frame length.