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