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