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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/core/pcm_local.h
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/* SPDX-License-Identifier: GPL-2.0-only */

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/*

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 * pcm_local.h - a local header file for snd-pcm module.

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 *

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 * Copyright (c) Takashi Sakamoto <[email protected]>

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 */

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#ifndef __SOUND_CORE_PCM_LOCAL_H

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#define __SOUND_CORE_PCM_LOCAL_H

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extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;

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void snd_interval_mul(const struct snd_interval *a,

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		      const struct snd_interval *b, struct snd_interval *c);

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void snd_interval_div(const struct snd_interval *a,

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		      const struct snd_interval *b, struct snd_interval *c);

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void snd_interval_muldivk(const struct snd_interval *a,

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			  const struct snd_interval *b,

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			  unsigned int k, struct snd_interval *c);

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void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,

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			  const struct snd_interval *b, struct snd_interval *c);

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int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime,

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			       snd_pcm_hw_param_t var, u_int32_t mask);

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int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream,

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			   snd_pcm_uframes_t appl_ptr);

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int snd_pcm_update_state(struct snd_pcm_substream *substream,

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			 struct snd_pcm_runtime *runtime);

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int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);

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void snd_pcm_playback_silence(struct snd_pcm_substream *substream,

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			      snd_pcm_uframes_t new_hw_ptr);

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static inline snd_pcm_uframes_t

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snd_pcm_avail(struct snd_pcm_substream *substream)

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{

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	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)

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		return snd_pcm_playback_avail(substream->runtime);

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	else

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		return snd_pcm_capture_avail(substream->runtime);

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}

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static inline snd_pcm_uframes_t

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snd_pcm_hw_avail(struct snd_pcm_substream *substream)

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{

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	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)

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		return snd_pcm_playback_hw_avail(substream->runtime);

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	else

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		return snd_pcm_capture_hw_avail(substream->runtime);

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}

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#ifdef CONFIG_SND_PCM_TIMER

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void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);

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void snd_pcm_timer_init(struct snd_pcm_substream *substream);

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void snd_pcm_timer_done(struct snd_pcm_substream *substream);

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#else

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static inline void

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snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}

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static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}

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static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}

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#endif

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void __snd_pcm_xrun(struct snd_pcm_substream *substream);

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void snd_pcm_group_init(struct snd_pcm_group *group);

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void snd_pcm_sync_stop(struct snd_pcm_substream *substream, bool sync_irq);

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#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)

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/* loop over all PCM substreams */

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#define for_each_pcm_substream(pcm, str, subs) \

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	for ((str) = 0; (str) < 2; (str)++) \

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		for ((subs) = (pcm)->streams[str].substream; (subs); \

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		     (subs) = (subs)->next)

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static inline void snd_pcm_dma_buffer_sync(struct snd_pcm_substream *substream,

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					   enum snd_dma_sync_mode mode)

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{

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	if (substream->runtime->info & SNDRV_PCM_INFO_EXPLICIT_SYNC)

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		snd_dma_buffer_sync(snd_pcm_get_dma_buf(substream), mode);

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}

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#endif	/* __SOUND_CORE_PCM_LOCAL_H */

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