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 ------------------------------------------------------------*/