00001 /* 00002 * SpanDSP - a series of DSP components for telephony 00003 * 00004 * private/tone_generate.h - General telephony 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_TONE_GENERATE_H_) 00027 #define _SPANDSP_PRIVATE_TONE_GENERATE_H_ 00028 00029 struct tone_gen_tone_descriptor_s 00030 { 00031 int32_t phase_rate; 00032 #if defined(SPANDSP_USE_FIXED_POINT) 00033 int16_t gain; 00034 #else 00035 float gain; 00036 #endif 00037 }; 00038 00039 /*! 00040 Cadenced multi-tone generator descriptor. 00041 */ 00042 struct tone_gen_descriptor_s 00043 { 00044 tone_gen_tone_descriptor_t tone[4]; 00045 int duration[4]; 00046 int repeat; 00047 }; 00048 00049 /*! 00050 Cadenced multi-tone generator state descriptor. This defines the state of 00051 a single working instance of a generator. 00052 */ 00053 struct tone_gen_state_s 00054 { 00055 tone_gen_tone_descriptor_t tone[4]; 00056 00057 uint32_t phase[4]; 00058 int duration[4]; 00059 int repeat; 00060 00061 int current_section; 00062 int current_position; 00063 }; 00064 00065 #endif 00066 /*- End of file ------------------------------------------------------------*/