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- /* 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 <[email protected]>
- */
- 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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