[ALSA] Clean up PCM codes (take 2)
[linux-3.10.git] / 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@suse.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
25 struct 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
39 struct 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 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
60         struct snd_pcm_plugin *plugin_first;
61         struct snd_pcm_plugin *plugin_last;
62 #endif
63         unsigned int prev_hw_ptr_interrupt;
64 };
65
66 struct snd_pcm_oss_file {
67         struct snd_pcm_substream *streams[2];
68 };
69
70 struct snd_pcm_oss_substream {
71         unsigned oss: 1;                        /* oss mode */
72         struct snd_pcm_oss_setup *setup;                /* active setup */
73 };
74
75 struct snd_pcm_oss_stream {
76         struct snd_pcm_oss_setup *setup_list;   /* setup list */
77         struct mutex setup_mutex;
78         struct snd_info_entry *proc_entry;
79 };
80
81 struct snd_pcm_oss {
82         int reg;
83         unsigned int reg_mask;
84 };
85
86 #endif /* __SOUND_PCM_OSS_H */