dtmf_rx_state_t Struct Reference

#include <dtmf.h>

List of all members.

Public Attributes

digits_rx_callback_t digits_callback
void * digits_callback_data
tone_report_func_t realtime_callback
void * realtime_callback_data
int filter_dialtone
float z350 [2]
float z440 [2]
float normal_twist
float reverse_twist
float threshold
float energy
goertzel_state_t row_out [4]
goertzel_state_t col_out [4]
uint8_t last_hit
uint8_t in_digit
int current_sample
int lost_digits
int current_digits
char digits [MAX_DTMF_DIGITS+1]


Detailed Description

DTMF digit detector descriptor.


Member Data Documentation

goertzel_state_t dtmf_rx_state_t::col_out[4]
 

Tone detector working states for the column tones.

int dtmf_rx_state_t::current_digits
 

The number of digits currently in the digit buffer.

int dtmf_rx_state_t::current_sample
 

The current sample number within a processing block.

char dtmf_rx_state_t::digits[MAX_DTMF_DIGITS+1]
 

The received digits buffer. This is a NULL terminated string.

digits_rx_callback_t dtmf_rx_state_t::digits_callback
 

Optional callback funcion to deliver received digits.

void* dtmf_rx_state_t::digits_callback_data
 

An opaque pointer passed to the callback function.

float dtmf_rx_state_t::energy
 

The accumlating total energy on the same period over which the Goertzels work.

int dtmf_rx_state_t::filter_dialtone
 

TRUE if dialtone should be filtered before processing

uint8_t dtmf_rx_state_t::in_digit
 

The confirmed digit we are currently receiving

uint8_t dtmf_rx_state_t::last_hit
 

The result of the last tone analysis.

int dtmf_rx_state_t::lost_digits
 

The number of digits which have been lost due to buffer overflows.

float dtmf_rx_state_t::normal_twist
 

Maximum acceptable "normal" (lower bigger than higher) twist ratio.

tone_report_func_t dtmf_rx_state_t::realtime_callback
 

Optional callback funcion to deliver real time digit state changes.

void* dtmf_rx_state_t::realtime_callback_data
 

An opaque pointer passed to the real time callback function.

float dtmf_rx_state_t::reverse_twist
 

Maximum acceptable "reverse" (higher bigger than lower) twist ratio.

goertzel_state_t dtmf_rx_state_t::row_out[4]
 

Tone detector working states for the row tones.

float dtmf_rx_state_t::threshold
 

Minimum acceptable tone level for detection.

float dtmf_rx_state_t::z350[2]
 

350Hz filter state for the optional dialtone filter.

float dtmf_rx_state_t::z440[2]
 

440Hz filter state for the optional dialtone filter.


The documentation for this struct was generated from the following file:
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