LXR linux/sound/core/pcm

   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);
  66
  67#ifdef CONFIG_SND_DMA_SGBUF
  68struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
  69                                    unsigned long offset);
  70#endif
  71
  72#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
  73
  74#endif  /* __SOUND_CORE_PCM_LOCAL_H */
  75