tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * pcm_local.h - a local header file for snd-pcm module.
3 *
4 * Copyright (c) Takashi Sakamoto <o-takashi@sakamocchi.jp>
5 *
6 * Licensed under the terms of the GNU General Public License, version 2.
7 */
8
9#ifndef __SOUND_CORE_PCM_LOCAL_H
10#define __SOUND_CORE_PCM_LOCAL_H
11
12extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
13
14void snd_interval_mul(const struct snd_interval *a,
15 const struct snd_interval *b, struct snd_interval *c);
16void snd_interval_div(const struct snd_interval *a,
17 const struct snd_interval *b, struct snd_interval *c);
18void snd_interval_muldivk(const struct snd_interval *a,
19 const struct snd_interval *b,
20 unsigned int k, struct snd_interval *c);
21void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
22 const struct snd_interval *b, struct snd_interval *c);
23
24int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
25int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
26
27int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime,
28 snd_pcm_hw_param_t var, u_int32_t mask);
29
30int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream,
31 snd_pcm_uframes_t appl_ptr);
32int snd_pcm_update_state(struct snd_pcm_substream *substream,
33 struct snd_pcm_runtime *runtime);
34int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
35
36void snd_pcm_playback_silence(struct snd_pcm_substream *substream,
37 snd_pcm_uframes_t new_hw_ptr);
38
39static inline snd_pcm_uframes_t
40snd_pcm_avail(struct snd_pcm_substream *substream)
41{
42 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
43 return snd_pcm_playback_avail(substream->runtime);
44 else
45 return snd_pcm_capture_avail(substream->runtime);
46}
47
48static inline snd_pcm_uframes_t
49snd_pcm_hw_avail(struct snd_pcm_substream *substream)
50{
51 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
52 return snd_pcm_playback_hw_avail(substream->runtime);
53 else
54 return snd_pcm_capture_hw_avail(substream->runtime);
55}
56
57#ifdef CONFIG_SND_PCM_TIMER
58void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
59void snd_pcm_timer_init(struct snd_pcm_substream *substream);
60void snd_pcm_timer_done(struct snd_pcm_substream *substream);
61#else
62static inline void
63snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}
64static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
65static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
66#endif
67
68void __snd_pcm_xrun(struct snd_pcm_substream *substream);
69void snd_pcm_group_init(struct snd_pcm_group *group);
70
71#endif /* __SOUND_CORE_PCM_LOCAL_H */