chiark / gitweb /
Fiddle with CSS+HTML in effort to get more consistent buttons
[disorder] / lib / alsabg.h
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1/*
2 * This file is part of DisOrder.
3 * Copyright (C) 2008 Richard Kettlewell
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20/** @file alsabg.h
21 * @brief Background-thread interface to ALSA
22 *
23 * This wraps ALSA with an interface which calls back to the client from a
24 * thread. It's not intended for completely general use, just what DisOrder
25 * needs.
26 */
27
28#ifndef ALSABG_H
29#define ALSABG_H
30
31/** @brief Supply audio callback
32 * @param dst Where to write audio data
33 * @param nsamples Number of samples to write
34 *
35 * This function should write up to @p *nsamples samples of data at
36 * @p dst, and return the number of samples written, or -1 if some error
37 * occurred. It will be called in a background thread.
38 */
39typedef int alsa_bg_supply(void *dst,
2956aeb4 40 unsigned nsamples_max);
4dadf1a2 41
2956aeb4 42void alsa_bg_init(const char *dev,
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43 alsa_bg_supply *supply);
44
45void alsa_bg_enable(void);
46
47void alsa_bg_disable(void);
48
49void alsa_bg_close(void);
50
51#endif /* ALSABG_H */
52
53/*
54Local Variables:
55c-basic-offset:2
56comment-column:40
57fill-column:79
58indent-tabs-mode:nil
59End:
60*/