2 * This file is part of DisOrder.
3 * Copyright (C) 2008 Richard Kettlewell
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.
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.
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
21 * @brief Background-thread interface to ALSA
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
31 /** @brief Supply audio callback
32 * @param dst Where to write audio data
33 * @param nsamples Number of samples to write
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.
39 typedef int alsa_bg_supply(void *dst,
42 void alsa_bg_init(const char *device,
43 alsa_bg_supply *supply);
45 void alsa_bg_enable(void);
47 void alsa_bg_disable(void);
49 void alsa_bg_close(void);