SCO Hook

Bluetooth SCO Hook Application Programming Interface. More...

Modules
	API Functions
	API Functions module for SCO Hook.
	Data Types
	Data Types for SCO Hook.

Variables
int16_t *	p_input
	Pointer to Received PCM samples (16 bits, Mono)
int16_t *	p_output
	Pointer to PCM samples which will be send (16 bits, Mono)
uint32_t	sample_count
	Number of PCM samples.
uint32_t   value
uint32_t   timeSeqNum: 16
uint32_t   res: 8
uint32_t   bufSmpCnt: 8
struct {
uint32_t   timeSeqNum: 16
uint32_t   res: 8
uint32_t   bufSmpCnt: 8
}   in
	< bit definition used for input SCO (PCM) data. More...
uint32_t   corr: 9
uint32_t   sign: 1
uint32_t   tStamp: 21
uint32_t   reset: 1
struct {
uint32_t   corr: 9
uint32_t   sign: 1
uint32_t   tStamp: 21
uint32_t   reset: 1
}   out
union {
struct {
uint32_t   timeSeqNum: 16
uint32_t   res: 8
uint32_t   bufSmpCnt: 8
}   in
	< bit definition used for input SCO (PCM) data. More...
struct {
uint32_t   corr: 9
uint32_t   sign: 1
uint32_t   tStamp: 21
uint32_t   reset: 1
}   out
}   sco_info
union {
uint32_t   value
union {
struct {
uint32_t   timeSeqNum: 16
uint32_t   res: 8
uint32_t   bufSmpCnt: 8
}   in
	< bit definition used for input SCO (PCM) data. More...
struct {
uint32_t   corr: 9
uint32_t   sign: 1
uint32_t   tStamp: 21
uint32_t   reset: 1
}   out
}   sco_info
}	inserted_silence_len
	Number of silence PCM samples (0 for for Mic)
wiced_bt_sco_hook_event_mic_samples_t	mic_samples
wiced_bt_sco_hook_event_spk_samples_t	spk_samples
wiced_bt_sco_hook_event_spk_inserted_zeros_t	spk_zeros_inserted

Detailed Description

Bluetooth SCO Hook Application Programming Interface.

The SCO Hook library provides API to access SCO/eSCO data (both received and sent). This API can be used by the application to introduce a sound in the SCO data (to the Speaker or from the Microphone) or to implement Noise Reduction and Echo Cancellation. Incoming voice packets (i.e. from Audio Gateway) are passed to the application which can modify them before they goes out of the chip (e.g. to external Codec for rendering). Outgoing voice packets (e.g. from Microphone connected to an external Codec) are passed to the application which can modify them before they are send (to the Audio Gateway). The Audio Algorithm (DSP code) must be provided by the application. Note that the CPU clock is increased to the maximum (i.e. 96 MHz) when the callback is called. Once the callback returns, the CPU clock is set back to the normal frequency.

Variable Documentation

struct { ... } in

< bit definition used for input SCO (PCM) data.

bit definition used for output SCO (PCM) data to PCM.

struct { ... } in

< bit definition used for input SCO (PCM) data.

bit definition used for output SCO (PCM) data to PCM.