private/super_tone_tx.h

00001 /*
00002  * SpanDSP - a series of DSP components for telephony
00003  *
00004  * private/super_tone_tx.h - Flexible telephony supervisory tone generation.
00005  *
00006  * Written by Steve Underwood <steveu@coppice.org>
00007  *
00008  * Copyright (C) 2001 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  * $Id: super_tone_tx.h,v 1.1 2008/11/30 10:22:19 steveu Exp $
00026  */
00027 
00028 #if !defined(_SPANDSP_PRIVATE_SUPER_TONE_TX_H_)
00029 #define _SPANDSP_PRIVATE_SUPER_TONE_TX_H_
00030 
00031 struct super_tone_tx_step_s
00032 {
00033     tone_gen_tone_descriptor_t tone[4];
00034     int tone_on;
00035     int length;
00036     int cycles;
00037     super_tone_tx_step_t *next;
00038     super_tone_tx_step_t *nest;
00039 };
00040 
00041 struct super_tone_tx_state_s
00042 {
00043     tone_gen_tone_descriptor_t tone[4];
00044     uint32_t phase[4];
00045     int current_position;
00046     int level;
00047     super_tone_tx_step_t *levels[4];
00048     int cycles[4];
00049 };
00050 
00051 #endif
00052 /*- End of file ------------------------------------------------------------*/

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