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 
00026 #if !defined(_SPANDSP_PRIVATE_SUPER_TONE_TX_H_)
00027 #define _SPANDSP_PRIVATE_SUPER_TONE_TX_H_
00028 
00029 struct super_tone_tx_step_s
00030 {
00031     tone_gen_tone_descriptor_t tone[4];
00032     int tone_on;
00033     int length;
00034     int cycles;
00035     super_tone_tx_step_t *next;
00036     super_tone_tx_step_t *nest;
00037 };
00038 
00039 struct super_tone_tx_state_s
00040 {
00041     tone_gen_tone_descriptor_t tone[4];
00042     uint32_t phase[4];
00043     int current_position;
00044     int level;
00045     super_tone_tx_step_t *levels[4];
00046     int cycles[4];
00047 };
00048 
00049 #endif
00050 /*- End of file ------------------------------------------------------------*/