sig_tone.c File Reference

#include <stdlib.h>
#include <stdio.h>
#include <inttypes.h>
#include <memory.h>
#include <string.h>
#include "spandsp/telephony.h"
#include "spandsp/dc_restore.h"
#include "spandsp/dds.h"
#include "spandsp/sig_tone.h"

Defines
#define	PI   3.14159265358979323
Functions
int	sig_tone_rx (sig_tone_state_t *s, int16_t amp[], int len)
	Process a block of received audio samples.
int	sig_tone_tx (sig_tone_state_t *s, int16_t amp[], int len)
	Generate a block of signaling tone audio samples.
sig_tone_state_t *	sig_tone_init (sig_tone_state_t *s, int tone_type, sig_tone_func_t sig_update, void *user_data)
	Initialise a signaling tone context.
Variables
sig_tone_descriptor_t	sig_tones [4]

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Detailed Description

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Function Documentation

sig_tone_state_t* sig_tone_init (  sig_tone_state_t *  s, int  tone_type, sig_tone_func_t  sig_update, void *  user_data )

Initialise a signaling tone context. Initialise a signaling tone context. Parameters: s  The signaling tone context. tone_type  The type of signaling tone. sig_update  Callback function to handle signaling updates. user_data  An opaque pointer. Returns: A pointer to the signalling tone context, or NULL if there was a problem.

int sig_tone_rx (  sig_tone_state_t *  s, int16_t  amp[], int  len )

Process a block of received audio samples. Process a block of received audio samples. Parameters: s  The signaling tone context. amp  The audio sample buffer. len  The number of samples in the buffer. Returns: The number of samples unprocessed.

int sig_tone_tx (  sig_tone_state_t *  s, int16_t  amp[], int  len )

Generate a block of signaling tone audio samples. Generate a block of signaling tone audio samples. Parameters: s  The signaling tone context. amp  The audio sample buffer. len  The number of samples to be generated. Returns: The number of samples actually generated.

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