private/super_tone_rx.h
/*
* SpanDSP - a series of DSP components for telephony
*
* private/super_tone_rx.h - Flexible telephony supervisory tone detection.
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2003 Steve Underwood
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1,
* as published by the Free Software Foundation.
*
* This program 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 program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#if !defined(_SPANDSP_PRIVATE_SUPER_TONE_RX_H_)
#define _SPANDSP_PRIVATE_SUPER_TONE_RX_H_
#define SUPER_TONE_BINS 128
struct super_tone_rx_segment_s
{
int f1;
int f2;
int recognition_duration;
int min_duration;
int max_duration;
};
struct super_tone_rx_descriptor_s
{
int used_frequencies;
int monitored_frequencies;
int pitches[SUPER_TONE_BINS/2][2];
int tones;
super_tone_rx_segment_t **tone_list;
int *tone_segs;
goertzel_descriptor_t *desc;
};
struct super_tone_rx_state_s
{
super_tone_rx_descriptor_t *desc;
float energy;
int detected_tone;
int rotation;
tone_report_func_t tone_callback;
tone_segment_func_t segment_callback;
void *callback_data;
super_tone_rx_segment_t segments[11];
goertzel_state_t state[];
};
#endif
/*- End of file ------------------------------------------------------------*/
super_tone_rx_descriptor_s
Definition private/super_tone_rx.h:41
super_tone_rx_segment_s
Definition private/super_tone_rx.h:32
super_tone_rx_state_s
Definition private/super_tone_rx.h:52