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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_H9#define __SOUND_CORE_PCM_LOCAL_H10 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_t36snd_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 else41 return snd_pcm_capture_avail(substream->runtime);42}43 44static inline snd_pcm_uframes_t45snd_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 else50 return snd_pcm_capture_hw_avail(substream->runtime);51}52 53#ifdef CONFIG_SND_PCM_TIMER54void 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#else58static inline void59snd_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#endif63 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 */84