David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | #ifndef __SOUND_PCM_OSS_H |
| 3 | #define __SOUND_PCM_OSS_H |
| 4 | |
| 5 | /* |
| 6 | * Digital Audio (PCM) - OSS compatibility abstract layer |
| 7 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | struct snd_pcm_oss_setup { |
| 11 | char *task_name; |
| 12 | unsigned int disable:1, |
| 13 | direct:1, |
| 14 | block:1, |
| 15 | nonblock:1, |
| 16 | partialfrag:1, |
| 17 | nosilence:1, |
| 18 | buggyptr:1; |
| 19 | unsigned int periods; |
| 20 | unsigned int period_size; |
| 21 | struct snd_pcm_oss_setup *next; |
| 22 | }; |
| 23 | |
| 24 | struct snd_pcm_oss_runtime { |
| 25 | unsigned params: 1, /* format/parameter change */ |
| 26 | prepare: 1, /* need to prepare the operation */ |
| 27 | trigger: 1, /* trigger flag */ |
| 28 | sync_trigger: 1; /* sync trigger flag */ |
| 29 | int rate; /* requested rate */ |
| 30 | int format; /* requested OSS format */ |
| 31 | unsigned int channels; /* requested channels */ |
| 32 | unsigned int fragshift; |
| 33 | unsigned int maxfrags; |
| 34 | unsigned int subdivision; /* requested subdivision */ |
| 35 | size_t period_bytes; /* requested period size */ |
| 36 | size_t period_frames; /* period frames for poll */ |
| 37 | size_t period_ptr; /* actual write pointer to period */ |
| 38 | unsigned int periods; |
| 39 | size_t buffer_bytes; /* requested buffer size */ |
| 40 | size_t bytes; /* total # bytes processed */ |
| 41 | size_t mmap_bytes; |
| 42 | char *buffer; /* vmallocated period */ |
| 43 | size_t buffer_used; /* used length from period buffer */ |
| 44 | struct mutex params_lock; |
| 45 | atomic_t rw_ref; /* concurrent read/write accesses */ |
| 46 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
| 47 | struct snd_pcm_plugin *plugin_first; |
| 48 | struct snd_pcm_plugin *plugin_last; |
| 49 | #endif |
| 50 | unsigned int prev_hw_ptr_period; |
| 51 | }; |
| 52 | |
| 53 | struct snd_pcm_oss_file { |
| 54 | struct snd_pcm_substream *streams[2]; |
| 55 | }; |
| 56 | |
| 57 | struct snd_pcm_oss_substream { |
| 58 | unsigned oss: 1; /* oss mode */ |
| 59 | struct snd_pcm_oss_setup setup; /* active setup */ |
| 60 | }; |
| 61 | |
| 62 | struct snd_pcm_oss_stream { |
| 63 | struct snd_pcm_oss_setup *setup_list; /* setup list */ |
| 64 | struct mutex setup_mutex; |
| 65 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
| 66 | struct snd_info_entry *proc_entry; |
| 67 | #endif |
| 68 | }; |
| 69 | |
| 70 | struct snd_pcm_oss { |
| 71 | int reg; |
| 72 | unsigned int reg_mask; |
| 73 | }; |
| 74 | |
| 75 | #endif /* __SOUND_PCM_OSS_H */ |