Mercurial > hg > audiostuff
comparison spandsp-0.0.6pre17/src/spandsp/swept_tone.h @ 4:26cd8f1ef0b1
import spandsp-0.0.6pre17
| author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
|---|---|
| date | Fri, 25 Jun 2010 15:50:58 +0200 |
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| 3:c6c5a16ce2f2 | 4:26cd8f1ef0b1 |
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| 1 /* | |
| 2 * SpanDSP - a series of DSP components for telephony | |
| 3 * | |
| 4 * swept_tone.h - Swept tone generation | |
| 5 * | |
| 6 * Written by Steve Underwood <steveu@coppice.org> | |
| 7 * | |
| 8 * Copyright (C) 2009 Steve Underwood | |
| 9 * | |
| 10 * All rights reserved. | |
| 11 * | |
| 12 * This program is free software; you can redistribute it and/or modify | |
| 13 * it under the terms of the GNU General Public License version 2, as | |
| 14 * published by the Free Software Foundation. | |
| 15 * | |
| 16 * This program is distributed in the hope that it will be useful, | |
| 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 19 * GNU General Public License for more details. | |
| 20 * | |
| 21 * You should have received a copy of the GNU General Public License | |
| 22 * along with this program; if not, write to the Free Software | |
| 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 24 * | |
| 25 * $Id: swept_tone.h,v 1.1 2009/09/22 12:54:33 steveu Exp $ | |
| 26 */ | |
| 27 | |
| 28 /*! \file */ | |
| 29 | |
| 30 #if !defined(_SPANDSP_SWEPT_TONE_H_) | |
| 31 #define _SPANDSP_SWEPT_TONE_H_ | |
| 32 | |
| 33 /*! \page swept_tone_page The swept tone generator | |
| 34 \section swept_tone_page_sec_1 What does it do? | |
| 35 */ | |
| 36 | |
| 37 typedef struct swept_tone_state_s swept_tone_state_t; | |
| 38 | |
| 39 #if defined(__cplusplus) | |
| 40 extern "C" | |
| 41 { | |
| 42 #endif | |
| 43 | |
| 44 SPAN_DECLARE(swept_tone_state_t *) swept_tone_init(swept_tone_state_t *s, float start, float end, float level, int duration, int repeating); | |
| 45 | |
| 46 SPAN_DECLARE(int) swept_tone(swept_tone_state_t *s, int16_t amp[], int len); | |
| 47 | |
| 48 SPAN_DECLARE(float) swept_tone_current_frequency(swept_tone_state_t *s); | |
| 49 | |
| 50 SPAN_DECLARE(int) swept_tone_release(swept_tone_state_t *s); | |
| 51 | |
| 52 SPAN_DECLARE(int) swept_tone_free(swept_tone_state_t *s); | |
| 53 | |
| 54 #if defined(__cplusplus) | |
| 55 } | |
| 56 #endif | |
| 57 | |
| 58 #endif | |
| 59 /*- End of file ------------------------------------------------------------*/ |