sound/core/pcm_local.h

   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
  11 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
  12
  13 void snd_interval_mul(const struct snd_interval *a,
  14                       const struct snd_interval *b, struct snd_interval *c);
  15 void snd_interval_div(const struct snd_interval *a,
  16                       const struct snd_interval *b, struct snd_interval *c);
  17 void snd_interval_muldivk(const struct snd_interval *a,
  18                           const struct snd_interval *b,
  19                           unsigned int k, struct snd_interval *c);
  20 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
  21                           const struct snd_interval *b, struct snd_interval *c);
  22
  23 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
  24 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
  25
  26 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime,
  27                                snd_pcm_hw_param_t var, u_int32_t mask);
  28
  29 int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream,
  30                            snd_pcm_uframes_t appl_ptr);
  31 int snd_pcm_update_state(struct snd_pcm_substream *substream,
  32                          struct snd_pcm_runtime *runtime);
  33 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
  34
  35 void snd_pcm_playback_silence(struct snd_pcm_substream *substream,
  36                               snd_pcm_uframes_t new_hw_ptr);
  37
  38 static inline snd_pcm_uframes_t
  39 snd_pcm_avail(struct snd_pcm_substream *substream)
  40 {
  41         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  42                 return snd_pcm_playback_avail(substream->runtime);
  43         else
  44                 return snd_pcm_capture_avail(substream->runtime);
  45 }
  46
  47 static inline snd_pcm_uframes_t
  48 snd_pcm_hw_avail(struct snd_pcm_substream *substream)
  49 {
  50         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  51                 return snd_pcm_playback_hw_avail(substream->runtime);
  52         else
  53                 return snd_pcm_capture_hw_avail(substream->runtime);
  54 }
  55
  56 #ifdef CONFIG_SND_PCM_TIMER
  57 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
  58 void snd_pcm_timer_init(struct snd_pcm_substream *substream);
  59 void snd_pcm_timer_done(struct snd_pcm_substream *substream);
  60 #else
  61 static inline void
  62 snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}
  63 static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
  64 static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
  65 #endif
  66
  67 void __snd_pcm_xrun(struct snd_pcm_substream *substream);
  68 void snd_pcm_group_init(struct snd_pcm_group *group);
  69
  70 #ifdef CONFIG_SND_DMA_SGBUF
  71 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
  72                                     unsigned long offset);
  73 #endif
  74
  75 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
  76
  77 #endif  /* __SOUND_CORE_PCM_LOCAL_H */