Mercurial > hg > audiostuff
comparison spandsp-0.0.6pre17/src/spandsp/private/super_tone_rx.h @ 4:26cd8f1ef0b1
import spandsp-0.0.6pre17
| author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
|---|---|
| date | Fri, 25 Jun 2010 15:50:58 +0200 |
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| 3:c6c5a16ce2f2 | 4:26cd8f1ef0b1 |
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| 1 /* | |
| 2 * SpanDSP - a series of DSP components for telephony | |
| 3 * | |
| 4 * private/super_tone_rx.h - Flexible telephony supervisory tone detection. | |
| 5 * | |
| 6 * Written by Steve Underwood <steveu@coppice.org> | |
| 7 * | |
| 8 * Copyright (C) 2003 Steve Underwood | |
| 9 * | |
| 10 * All rights reserved. | |
| 11 * | |
| 12 * This program is free software; you can redistribute it and/or modify | |
| 13 * it under the terms of the GNU Lesser General Public License version 2.1, | |
| 14 * as published by the Free Software Foundation. | |
| 15 * | |
| 16 * This program is distributed in the hope that it will be useful, | |
| 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 19 * GNU Lesser General Public License for more details. | |
| 20 * | |
| 21 * You should have received a copy of the GNU Lesser General Public | |
| 22 * License along with this program; if not, write to the Free Software | |
| 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 24 * | |
| 25 * $Id: super_tone_rx.h,v 1.1 2008/11/30 10:17:31 steveu Exp $ | |
| 26 */ | |
| 27 | |
| 28 #if !defined(_SPANDSP_PRIVATE_SUPER_TONE_RX_H_) | |
| 29 #define _SPANDSP_PRIVATE_SUPER_TONE_RX_H_ | |
| 30 | |
| 31 #define BINS 128 | |
| 32 | |
| 33 struct super_tone_rx_segment_s | |
| 34 { | |
| 35 int f1; | |
| 36 int f2; | |
| 37 int recognition_duration; | |
| 38 int min_duration; | |
| 39 int max_duration; | |
| 40 }; | |
| 41 | |
| 42 struct super_tone_rx_descriptor_s | |
| 43 { | |
| 44 int used_frequencies; | |
| 45 int monitored_frequencies; | |
| 46 int pitches[BINS/2][2]; | |
| 47 int tones; | |
| 48 super_tone_rx_segment_t **tone_list; | |
| 49 int *tone_segs; | |
| 50 goertzel_descriptor_t *desc; | |
| 51 }; | |
| 52 | |
| 53 struct super_tone_rx_state_s | |
| 54 { | |
| 55 super_tone_rx_descriptor_t *desc; | |
| 56 float energy; | |
| 57 int detected_tone; | |
| 58 int rotation; | |
| 59 tone_report_func_t tone_callback; | |
| 60 void (*segment_callback)(void *data, int f1, int f2, int duration); | |
| 61 void *callback_data; | |
| 62 super_tone_rx_segment_t segments[11]; | |
| 63 goertzel_state_t state[]; | |
| 64 }; | |
| 65 | |
| 66 #endif | |
| 67 /*- End of file ------------------------------------------------------------*/ |