Current File : //usr/src/kernels/3.10.0-957.21.3.el7.centos.plus.x86_64/include/sound/pcm_oss.h
#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>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
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 */
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