mirror of https://gitee.com/openkylin/linux.git
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#ifndef __SOUND_PCM_OSS_H
|
|
#define __SOUND_PCM_OSS_H
|
|
|
|
/*
|
|
* Digital Audio (PCM) - OSS compatibility abstract layer
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
|
|
*/
|
|
|
|
struct snd_pcm_oss_setup {
|
|
char *task_name;
|
|
unsigned int disable:1,
|
|
direct:1,
|
|
block:1,
|
|
nonblock:1,
|
|
partialfrag:1,
|
|
nosilence:1,
|
|
buggyptr:1;
|
|
unsigned int periods;
|
|
unsigned int period_size;
|
|
struct snd_pcm_oss_setup *next;
|
|
};
|
|
|
|
struct snd_pcm_oss_runtime {
|
|
unsigned params: 1, /* format/parameter change */
|
|
prepare: 1, /* need to prepare the operation */
|
|
trigger: 1, /* trigger flag */
|
|
sync_trigger: 1; /* sync trigger flag */
|
|
int rate; /* requested rate */
|
|
int format; /* requested OSS format */
|
|
unsigned int channels; /* requested channels */
|
|
unsigned int fragshift;
|
|
unsigned int maxfrags;
|
|
unsigned int subdivision; /* requested subdivision */
|
|
size_t period_bytes; /* requested period size */
|
|
size_t period_frames; /* period frames for poll */
|
|
size_t period_ptr; /* actual write pointer to period */
|
|
unsigned int periods;
|
|
size_t buffer_bytes; /* requested buffer size */
|
|
size_t bytes; /* total # bytes processed */
|
|
size_t mmap_bytes;
|
|
char *buffer; /* vmallocated period */
|
|
size_t buffer_used; /* used length from period buffer */
|
|
struct mutex params_lock;
|
|
atomic_t rw_ref; /* concurrent read/write accesses */
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
|
|
struct snd_pcm_plugin *plugin_first;
|
|
struct snd_pcm_plugin *plugin_last;
|
|
#endif
|
|
unsigned int prev_hw_ptr_period;
|
|
};
|
|
|
|
struct snd_pcm_oss_file {
|
|
struct snd_pcm_substream *streams[2];
|
|
};
|
|
|
|
struct snd_pcm_oss_substream {
|
|
unsigned oss: 1; /* oss mode */
|
|
struct snd_pcm_oss_setup setup; /* active setup */
|
|
};
|
|
|
|
struct snd_pcm_oss_stream {
|
|
struct snd_pcm_oss_setup *setup_list; /* setup list */
|
|
struct mutex setup_mutex;
|
|
#ifdef CONFIG_SND_VERBOSE_PROCFS
|
|
struct snd_info_entry *proc_entry;
|
|
#endif
|
|
};
|
|
|
|
struct snd_pcm_oss {
|
|
int reg;
|
|
unsigned int reg_mask;
|
|
};
|
|
|
|
#endif /* __SOUND_PCM_OSS_H */
|