58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/*
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* SpanDSP - a series of DSP components for telephony
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*
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* swept_tone.h - Swept tone generation
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*
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* Written by Steve Underwood <steveu@coppice.org>
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*
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* Copyright (C) 2009 Steve Underwood
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 2.1,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*! \file */
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#if !defined(_SPANDSP_SWEPT_TONE_H_)
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#define _SPANDSP_SWEPT_TONE_H_
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/*! \page swept_tone_page The swept tone generator
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\section swept_tone_page_sec_1 What does it do?
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*/
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typedef struct swept_tone_state_s swept_tone_state_t;
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#if defined(__cplusplus)
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extern "C"
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{
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#endif
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SPAN_DECLARE(swept_tone_state_t *) swept_tone_init(swept_tone_state_t *s, float start, float end, float level, int duration, int repeating);
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SPAN_DECLARE(int) swept_tone(swept_tone_state_t *s, int16_t amp[], int len);
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SPAN_DECLARE(float) swept_tone_current_frequency(swept_tone_state_t *s);
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SPAN_DECLARE(int) swept_tone_release(swept_tone_state_t *s);
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SPAN_DECLARE(int) swept_tone_free(swept_tone_state_t *s);
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#if defined(__cplusplus)
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}
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#endif
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#endif
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/*- End of file ------------------------------------------------------------*/
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