1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * pcm_local.h - a local header file for snd-pcm module. |
4 | * |
5 | * Copyright (c) Takashi Sakamoto <o-takashi@sakamocchi.jp> |
6 | */ |
7 | |
8 | #ifndef __SOUND_CORE_PCM_LOCAL_H |
9 | #define __SOUND_CORE_PCM_LOCAL_H |
10 | |
11 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; |
12 | |
13 | void snd_interval_mul(const struct snd_interval *a, |
14 | const struct snd_interval *b, struct snd_interval *c); |
15 | void snd_interval_div(const struct snd_interval *a, |
16 | const struct snd_interval *b, struct snd_interval *c); |
17 | void snd_interval_muldivk(const struct snd_interval *a, |
18 | const struct snd_interval *b, |
19 | unsigned int k, struct snd_interval *c); |
20 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
21 | const struct snd_interval *b, struct snd_interval *c); |
22 | |
23 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, |
24 | snd_pcm_hw_param_t var, u_int32_t mask); |
25 | |
26 | int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream, |
27 | snd_pcm_uframes_t appl_ptr); |
28 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
29 | struct snd_pcm_runtime *runtime); |
30 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
31 | |
32 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, |
33 | snd_pcm_uframes_t new_hw_ptr); |
34 | |
35 | static inline snd_pcm_uframes_t |
36 | snd_pcm_avail(struct snd_pcm_substream *substream) |
37 | { |
38 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
39 | return snd_pcm_playback_avail(runtime: substream->runtime); |
40 | else |
41 | return snd_pcm_capture_avail(runtime: substream->runtime); |
42 | } |
43 | |
44 | static inline snd_pcm_uframes_t |
45 | snd_pcm_hw_avail(struct snd_pcm_substream *substream) |
46 | { |
47 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
48 | return snd_pcm_playback_hw_avail(runtime: substream->runtime); |
49 | else |
50 | return snd_pcm_capture_hw_avail(runtime: substream->runtime); |
51 | } |
52 | |
53 | #ifdef CONFIG_SND_PCM_TIMER |
54 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
55 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); |
56 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); |
57 | #else |
58 | static inline void |
59 | snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {} |
60 | static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {} |
61 | static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {} |
62 | #endif |
63 | |
64 | void __snd_pcm_xrun(struct snd_pcm_substream *substream); |
65 | void snd_pcm_group_init(struct snd_pcm_group *group); |
66 | void snd_pcm_sync_stop(struct snd_pcm_substream *substream, bool sync_irq); |
67 | |
68 | #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) |
69 | |
70 | /* loop over all PCM substreams */ |
71 | #define for_each_pcm_substream(pcm, str, subs) \ |
72 | for ((str) = 0; (str) < 2; (str)++) \ |
73 | for ((subs) = (pcm)->streams[str].substream; (subs); \ |
74 | (subs) = (subs)->next) |
75 | |
76 | static inline void snd_pcm_dma_buffer_sync(struct snd_pcm_substream *substream, |
77 | enum snd_dma_sync_mode mode) |
78 | { |
79 | if (substream->runtime->info & SNDRV_PCM_INFO_EXPLICIT_SYNC) |
80 | snd_dma_buffer_sync(snd_pcm_get_dma_buf(substream), mode); |
81 | } |
82 | |
83 | #endif /* __SOUND_CORE_PCM_LOCAL_H */ |
84 | |