source: roaraudio/include/libroardsp/fader.h @ 5381:430b1d26e12d

Last change on this file since 5381:430b1d26e12d was 5381:430b1d26e12d, checked in by phi, 12 years ago

updated copyright years

File size: 2.2 KB
Line 
1//fader.h:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2012
5 *
6 *  This file is part of libroar a part of RoarAudio,
7 *  a cross-platform sound system for both, home and professional use.
8 *  See README for details.
9 *
10 *  This file is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 3
12 *  as published by the Free Software Foundation.
13 *
14 *  libroar is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this software; see the file COPYING.  If not, write to
21 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 *  Boston, MA 02110-1301, USA.
23 *
24 *  NOTE for everyone want's to change something and send patches:
25 *  read README and HACKING! There a addition information on
26 *  the license of this document you need to read before you send
27 *  any patches.
28 *
29 *  NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc
30 *  or libpulse*:
31 *  The libs libroaresd, libroararts and libroarpulse link this lib
32 *  and are therefore GPL. Because of this it may be illigal to use
33 *  them with any software that uses libesd, libartsc or libpulse*.
34 */
35
36#ifndef _LIBROARDSP_FADER_H_
37#define _LIBROARDSP_FADER_H_
38
39#include "libroardsp.h"
40
41#define ROAR_FADER_MAX_COEFF 4
42
43struct roar_fader_state {
44 int     rate;
45 ssize_t pcmoffset;
46 ssize_t start;
47 ssize_t stop;
48 float   poly[ROAR_FADER_MAX_COEFF];
49 int     coeff;
50};
51
52int roar_fader_init         (struct roar_fader_state * state, const float * poly, int coeff);
53int roar_fader_set_rate     (struct roar_fader_state * state, int rate);
54int roar_fader_set_startstop(struct roar_fader_state * state, ssize_t start, ssize_t stop);
55
56int roar_fader_has_started  (struct roar_fader_state * state);
57int roar_fader_has_ended    (struct roar_fader_state * state);
58
59int roar_fader_calcpcm_i16n(struct roar_fader_state * state, int16_t * data, size_t frames, int channels);
60int roar_fader_calcpcm_i161(struct roar_fader_state * state, int16_t * data, size_t frames);
61
62#endif
63
64//ll
Note: See TracBrowser for help on using the repository browser.