spandsp
0.0.6
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00001 /* 00002 * SpanDSP - a series of DSP components for telephony 00003 * 00004 * private/super_tone_rx.h - Flexible telephony supervisory tone detection. 00005 * 00006 * Written by Steve Underwood <steveu@coppice.org> 00007 * 00008 * Copyright (C) 2003 Steve Underwood 00009 * 00010 * All rights reserved. 00011 * 00012 * This program is free software; you can redistribute it and/or modify 00013 * it under the terms of the GNU Lesser General Public License version 2.1, 00014 * as published by the Free Software Foundation. 00015 * 00016 * This program is distributed in the hope that it will be useful, 00017 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00018 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00019 * GNU Lesser General Public License for more details. 00020 * 00021 * You should have received a copy of the GNU Lesser General Public 00022 * License along with this program; if not, write to the Free Software 00023 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 00024 */ 00025 00026 #if !defined(_SPANDSP_PRIVATE_SUPER_TONE_RX_H_) 00027 #define _SPANDSP_PRIVATE_SUPER_TONE_RX_H_ 00028 00029 #define BINS 128 00030 00031 struct super_tone_rx_segment_s 00032 { 00033 int f1; 00034 int f2; 00035 int recognition_duration; 00036 int min_duration; 00037 int max_duration; 00038 }; 00039 00040 struct super_tone_rx_descriptor_s 00041 { 00042 int used_frequencies; 00043 int monitored_frequencies; 00044 int pitches[BINS/2][2]; 00045 int tones; 00046 super_tone_rx_segment_t **tone_list; 00047 int *tone_segs; 00048 goertzel_descriptor_t *desc; 00049 }; 00050 00051 struct super_tone_rx_state_s 00052 { 00053 super_tone_rx_descriptor_t *desc; 00054 float energy; 00055 int detected_tone; 00056 int rotation; 00057 tone_report_func_t tone_callback; 00058 void (*segment_callback)(void *data, int f1, int f2, int duration); 00059 void *callback_data; 00060 super_tone_rx_segment_t segments[11]; 00061 goertzel_state_t state[]; 00062 }; 00063 00064 #endif 00065 /*- End of file ------------------------------------------------------------*/