Root/include/sound/pcm_oss.h

1#ifndef __SOUND_PCM_OSS_H
2#define __SOUND_PCM_OSS_H
3
4/*
5 * Digital Audio (PCM) - OSS compatibility abstract layer
6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program 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 program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25struct snd_pcm_oss_setup {
26    char *task_name;
27    unsigned int disable:1,
28             direct:1,
29             block:1,
30             nonblock:1,
31             partialfrag:1,
32             nosilence:1,
33             buggyptr:1;
34    unsigned int periods;
35    unsigned int period_size;
36    struct snd_pcm_oss_setup *next;
37};
38
39struct snd_pcm_oss_runtime {
40    unsigned params: 1, /* format/parameter change */
41         prepare: 1, /* need to prepare the operation */
42         trigger: 1, /* trigger flag */
43         sync_trigger: 1; /* sync trigger flag */
44    int rate; /* requested rate */
45    int format; /* requested OSS format */
46    unsigned int channels; /* requested channels */
47    unsigned int fragshift;
48    unsigned int maxfrags;
49    unsigned int subdivision; /* requested subdivision */
50    size_t period_bytes; /* requested period size */
51    size_t period_frames; /* period frames for poll */
52    size_t period_ptr; /* actual write pointer to period */
53    unsigned int periods;
54    size_t buffer_bytes; /* requested buffer size */
55    size_t bytes; /* total # bytes processed */
56    size_t mmap_bytes;
57    char *buffer; /* vmallocated period */
58    size_t buffer_used; /* used length from period buffer */
59    struct mutex params_lock;
60#ifdef CONFIG_SND_PCM_OSS_PLUGINS
61    struct snd_pcm_plugin *plugin_first;
62    struct snd_pcm_plugin *plugin_last;
63#endif
64    unsigned int prev_hw_ptr_period;
65};
66
67struct snd_pcm_oss_file {
68    struct snd_pcm_substream *streams[2];
69};
70
71struct snd_pcm_oss_substream {
72    unsigned oss: 1; /* oss mode */
73    struct snd_pcm_oss_setup setup; /* active setup */
74};
75
76struct snd_pcm_oss_stream {
77    struct snd_pcm_oss_setup *setup_list; /* setup list */
78    struct mutex setup_mutex;
79#ifdef CONFIG_SND_VERBOSE_PROCFS
80    struct snd_info_entry *proc_entry;
81#endif
82};
83
84struct snd_pcm_oss {
85    int reg;
86    unsigned int reg_mask;
87};
88
89#endif /* __SOUND_PCM_OSS_H */
90

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