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view spandsp-0.0.6pre17/src/spandsp/swept_tone.h @ 4:26cd8f1ef0b1
import spandsp-0.0.6pre17
author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
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date | Fri, 25 Jun 2010 15:50:58 +0200 |
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/* * SpanDSP - a series of DSP components for telephony * * swept_tone.h - Swept tone generation * * Written by Steve Underwood <steveu@coppice.org> * * Copyright (C) 2009 Steve Underwood * * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2, as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * $Id: swept_tone.h,v 1.1 2009/09/22 12:54:33 steveu Exp $ */ /*! \file */ #if !defined(_SPANDSP_SWEPT_TONE_H_) #define _SPANDSP_SWEPT_TONE_H_ /*! \page swept_tone_page The swept tone generator \section swept_tone_page_sec_1 What does it do? */ typedef struct swept_tone_state_s swept_tone_state_t; #if defined(__cplusplus) extern "C" { #endif SPAN_DECLARE(swept_tone_state_t *) swept_tone_init(swept_tone_state_t *s, float start, float end, float level, int duration, int repeating); SPAN_DECLARE(int) swept_tone(swept_tone_state_t *s, int16_t amp[], int len); SPAN_DECLARE(float) swept_tone_current_frequency(swept_tone_state_t *s); SPAN_DECLARE(int) swept_tone_release(swept_tone_state_t *s); SPAN_DECLARE(int) swept_tone_free(swept_tone_state_t *s); #if defined(__cplusplus) } #endif #endif /*- End of file ------------------------------------------------------------*/