1 /* SPDX-License-Identifier: GPL-2.0-or-later * <<
2 #ifndef __SOUND_PCM_OSS_H 1 #ifndef __SOUND_PCM_OSS_H
3 #define __SOUND_PCM_OSS_H 2 #define __SOUND_PCM_OSS_H
4 3
5 /* 4 /*
6 * Digital Audio (PCM) - OSS compatibility ab 5 * Digital Audio (PCM) - OSS compatibility abstract layer
7 * Copyright (c) by Jaroslav Kysela <perex@pe 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 *
8 */ 23 */
9 24
10 struct snd_pcm_oss_setup { 25 struct snd_pcm_oss_setup {
11 char *task_name; 26 char *task_name;
12 unsigned int disable:1, 27 unsigned int disable:1,
13 direct:1, 28 direct:1,
14 block:1, 29 block:1,
15 nonblock:1, 30 nonblock:1,
16 partialfrag:1, 31 partialfrag:1,
17 nosilence:1, 32 nosilence:1,
18 buggyptr:1; 33 buggyptr:1;
19 unsigned int periods; 34 unsigned int periods;
20 unsigned int period_size; 35 unsigned int period_size;
21 struct snd_pcm_oss_setup *next; 36 struct snd_pcm_oss_setup *next;
22 }; 37 };
23 38
24 struct snd_pcm_oss_runtime { 39 struct snd_pcm_oss_runtime {
25 unsigned params: 1, 40 unsigned params: 1, /* format/parameter change */
26 prepare: 1, 41 prepare: 1, /* need to prepare the operation */
27 trigger: 1, 42 trigger: 1, /* trigger flag */
28 sync_trigger: 1; 43 sync_trigger: 1; /* sync trigger flag */
29 int rate; 44 int rate; /* requested rate */
30 int format; 45 int format; /* requested OSS format */
31 unsigned int channels; 46 unsigned int channels; /* requested channels */
32 unsigned int fragshift; 47 unsigned int fragshift;
33 unsigned int maxfrags; 48 unsigned int maxfrags;
34 unsigned int subdivision; 49 unsigned int subdivision; /* requested subdivision */
35 size_t period_bytes; 50 size_t period_bytes; /* requested period size */
36 size_t period_frames; 51 size_t period_frames; /* period frames for poll */
37 size_t period_ptr; 52 size_t period_ptr; /* actual write pointer to period */
38 unsigned int periods; 53 unsigned int periods;
39 size_t buffer_bytes; 54 size_t buffer_bytes; /* requested buffer size */
40 size_t bytes; 55 size_t bytes; /* total # bytes processed */
41 size_t mmap_bytes; 56 size_t mmap_bytes;
42 char *buffer; 57 char *buffer; /* vmallocated period */
43 size_t buffer_used; 58 size_t buffer_used; /* used length from period buffer */
44 struct mutex params_lock; 59 struct mutex params_lock;
45 atomic_t rw_ref; /* con <<
46 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 60 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
47 struct snd_pcm_plugin *plugin_first; 61 struct snd_pcm_plugin *plugin_first;
48 struct snd_pcm_plugin *plugin_last; 62 struct snd_pcm_plugin *plugin_last;
49 #endif 63 #endif
50 unsigned int prev_hw_ptr_period; 64 unsigned int prev_hw_ptr_period;
51 }; 65 };
52 66
53 struct snd_pcm_oss_file { 67 struct snd_pcm_oss_file {
54 struct snd_pcm_substream *streams[2]; 68 struct snd_pcm_substream *streams[2];
55 }; 69 };
56 70
57 struct snd_pcm_oss_substream { 71 struct snd_pcm_oss_substream {
58 unsigned oss: 1; 72 unsigned oss: 1; /* oss mode */
59 struct snd_pcm_oss_setup setup; 73 struct snd_pcm_oss_setup setup; /* active setup */
60 }; 74 };
61 75
62 struct snd_pcm_oss_stream { 76 struct snd_pcm_oss_stream {
63 struct snd_pcm_oss_setup *setup_list; 77 struct snd_pcm_oss_setup *setup_list; /* setup list */
64 struct mutex setup_mutex; 78 struct mutex setup_mutex;
65 #ifdef CONFIG_SND_VERBOSE_PROCFS 79 #ifdef CONFIG_SND_VERBOSE_PROCFS
66 struct snd_info_entry *proc_entry; 80 struct snd_info_entry *proc_entry;
67 #endif 81 #endif
68 }; 82 };
69 83
70 struct snd_pcm_oss { 84 struct snd_pcm_oss {
71 int reg; 85 int reg;
72 unsigned int reg_mask; 86 unsigned int reg_mask;
73 }; 87 };
74 88
75 #endif /* __SOUND_PCM_OSS_H */ 89 #endif /* __SOUND_PCM_OSS_H */
76 90
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