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 
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 	struct mutex params_lock;
60 	atomic_t rw_ref;		/* concurrent read/write accesses */
61 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
62 	struct snd_pcm_plugin *plugin_first;
63 	struct snd_pcm_plugin *plugin_last;
64 #endif
65 	unsigned int prev_hw_ptr_period;
66 };
67 
68 struct snd_pcm_oss_file {
69 	struct snd_pcm_substream *streams[2];
70 };
71 
72 struct snd_pcm_oss_substream {
73 	unsigned oss: 1;			/* oss mode */
74 	struct snd_pcm_oss_setup setup;		/* active setup */
75 };
76 
77 struct snd_pcm_oss_stream {
78 	struct snd_pcm_oss_setup *setup_list;	/* setup list */
79 	struct mutex setup_mutex;
80 #ifdef CONFIG_SND_VERBOSE_PROCFS
81 	struct snd_info_entry *proc_entry;
82 #endif
83 };
84 
85 struct snd_pcm_oss {
86 	int reg;
87 	unsigned int reg_mask;
88 };
89 
90 #endif /* __SOUND_PCM_OSS_H */
91