1 #ifndef __SOUND_PCM_OSS_H
2 #define __SOUND_PCM_OSS_H
5 * Digital Audio (PCM) - OSS compatibility abstract layer
6 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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.
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.
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
25 typedef struct _snd_pcm_plugin snd_pcm_plugin_t;
26 typedef struct _snd_pcm_oss_setup snd_pcm_oss_setup_t;
28 struct _snd_pcm_oss_setup {
30 unsigned int disable:1,
37 unsigned int period_size;
38 snd_pcm_oss_setup_t *next;
41 typedef struct _snd_pcm_oss_runtime {
42 int params: 1, /* format/parameter change */
43 prepare: 1, /* need to prepare the operation */
44 trigger: 1, /* trigger flag */
45 sync_trigger: 1; /* sync trigger flag */
46 int rate; /* requested rate */
47 int format; /* requested OSS format */
48 unsigned int channels; /* requested channels */
49 unsigned int fragshift;
50 unsigned int maxfrags;
51 unsigned int subdivision; /* requested subdivision */
52 size_t period_bytes; /* requested period size */
54 size_t buffer_bytes; /* requested period size */
55 size_t bytes; /* total # bytes processed */
57 char *buffer; /* vmallocated period */
58 size_t buffer_used; /* used length from buffer */
59 snd_pcm_plugin_t *plugin_first;
60 snd_pcm_plugin_t *plugin_last;
61 unsigned int prev_hw_ptr_interrupt;
62 } snd_pcm_oss_runtime_t;
64 typedef struct _snd_pcm_oss_file {
65 snd_pcm_substream_t *streams[2];
68 typedef struct _snd_pcm_oss_substream {
69 int oss: 1; /* oss mode */
70 snd_pcm_oss_setup_t *setup; /* active setup */
71 snd_pcm_oss_file_t *file;
72 } snd_pcm_oss_substream_t;
74 typedef struct _snd_pcm_oss_stream {
75 snd_pcm_oss_setup_t *setup_list; /* setup list */
76 struct semaphore setup_mutex;
77 snd_info_entry_t *proc_entry;
78 } snd_pcm_oss_stream_t;
80 typedef struct _snd_pcm_oss {
82 unsigned int reg_mask;
85 #endif /* __SOUND_PCM_OSS_H */