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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* pcm_local.h - a local header file for snd-pcm module.
*
* Copyright (c) Takashi Sakamoto <o-takashi@sakamocchi.jp>
*/
#ifndef __SOUND_CORE_PCM_LOCAL_H
#define __SOUND_CORE_PCM_LOCAL_H
extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
void snd_interval_mul(const struct snd_interval *a,
const struct snd_interval *b, struct snd_interval *c);
void snd_interval_div(const struct snd_interval *a,
const struct snd_interval *b, struct snd_interval *c);
void snd_interval_muldivk(const struct snd_interval *a,
const struct snd_interval *b,
unsigned int k, struct snd_interval *c);
void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
const struct snd_interval *b, struct snd_interval *c);
int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime,
snd_pcm_hw_param_t var, u_int32_t mask);
int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream,
snd_pcm_uframes_t appl_ptr);
int snd_pcm_update_state(struct snd_pcm_substream *substream,
struct snd_pcm_runtime *runtime);
int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
void snd_pcm_playback_silence(struct snd_pcm_substream *substream,
snd_pcm_uframes_t new_hw_ptr);
static inline snd_pcm_uframes_t
snd_pcm_avail(struct snd_pcm_substream *substream)
{
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
return snd_pcm_playback_avail(substream->runtime);
else
return snd_pcm_capture_avail(substream->runtime);
}
static inline snd_pcm_uframes_t
snd_pcm_hw_avail(struct snd_pcm_substream *substream)
{
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
return snd_pcm_playback_hw_avail(substream->runtime);
else
return snd_pcm_capture_hw_avail(substream->runtime);
}
#ifdef CONFIG_SND_PCM_TIMER
void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
void snd_pcm_timer_init(struct snd_pcm_substream *substream);
void snd_pcm_timer_done(struct snd_pcm_substream *substream);
#else
static inline void
snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}
static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
#endif
void __snd_pcm_xrun(struct snd_pcm_substream *substream);
void snd_pcm_group_init(struct snd_pcm_group *group);
void snd_pcm_sync_stop(struct snd_pcm_substream *substream, bool sync_irq);
#ifdef CONFIG_SND_DMA_SGBUF
struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
unsigned long offset);
#endif
#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
/* loop over all PCM substreams */
#define for_each_pcm_substream(pcm, str, subs) \
for ((str) = 0; (str) < 2; (str)++) \
for ((subs) = (pcm)->streams[str].substream; (subs); \
(subs) = (subs)->next)
#endif /* __SOUND_CORE_PCM_LOCAL_H */
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