/usr/include/spandsp/swept_tone.h is in libspandsp-dev 0.0.6~pre20-3.1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | /*
* 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 Lesser General Public License version 2.1,
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*! \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 ------------------------------------------------------------*/
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