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
11extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
12
13void snd_interval_mul(const struct snd_interval *a,
14		      const struct snd_interval *b, struct snd_interval *c);
15void snd_interval_div(const struct snd_interval *a,
16		      const struct snd_interval *b, struct snd_interval *c);
17void snd_interval_muldivk(const struct snd_interval *a,
18			  const struct snd_interval *b,
19			  unsigned int k, struct snd_interval *c);
20void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
21			  const struct snd_interval *b, struct snd_interval *c);
22
 
 
 
23int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime,
24			       snd_pcm_hw_param_t var, u_int32_t mask);
25
26int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream,
27			   snd_pcm_uframes_t appl_ptr);
28int snd_pcm_update_state(struct snd_pcm_substream *substream,
29			 struct snd_pcm_runtime *runtime);
30int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
31
32void snd_pcm_playback_silence(struct snd_pcm_substream *substream,
33			      snd_pcm_uframes_t new_hw_ptr);
34
35static inline snd_pcm_uframes_t
36snd_pcm_avail(struct snd_pcm_substream *substream)
37{
38	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
39		return snd_pcm_playback_avail(substream->runtime);
40	else
41		return snd_pcm_capture_avail(substream->runtime);
42}
43
44static inline snd_pcm_uframes_t
45snd_pcm_hw_avail(struct snd_pcm_substream *substream)
46{
47	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
48		return snd_pcm_playback_hw_avail(substream->runtime);
49	else
50		return snd_pcm_capture_hw_avail(substream->runtime);
51}
52
53#ifdef CONFIG_SND_PCM_TIMER
54void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
55void snd_pcm_timer_init(struct snd_pcm_substream *substream);
56void snd_pcm_timer_done(struct snd_pcm_substream *substream);
57#else
58static inline void
59snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}
60static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
61static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
62#endif
63
64void __snd_pcm_xrun(struct snd_pcm_substream *substream);
65void snd_pcm_group_init(struct snd_pcm_group *group);
66void 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
76static 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 */

 
 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
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
39#ifdef CONFIG_SND_PCM_TIMER
40void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
41void snd_pcm_timer_init(struct snd_pcm_substream *substream);
42void snd_pcm_timer_done(struct snd_pcm_substream *substream);
43#else
44static inline void
45snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}
46static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
47static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
48#endif
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
49
50#endif	/* __SOUND_CORE_PCM_LOCAL_H */