sound/core/pcm_local.h

   1 /*
   2  * pcm_local.h - a local header file for snd-pcm module.
   3  *
   4  * Copyright (c) Takashi Sakamoto <o-takashi@sakamocchi.jp>
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8
   9 #ifndef __SOUND_CORE_PCM_LOCAL_H
  10 #define __SOUND_CORE_PCM_LOCAL_H
  11
  12 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
  13
  14 void snd_interval_mul(const struct snd_interval *a,
  15                       const struct snd_interval *b, struct snd_interval *c);
  16 void snd_interval_div(const struct snd_interval *a,
  17                       const struct snd_interval *b, struct snd_interval *c);
  18 void snd_interval_muldivk(const struct snd_interval *a,
  19                           const struct snd_interval *b,
  20                           unsigned int k, struct snd_interval *c);
  21 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
  22                           const struct snd_interval *b, struct snd_interval *c);
  23
  24 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
  25 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
  26
  27 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime,
  28                                snd_pcm_hw_param_t var, u_int32_t mask);
  29
  30 int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream,
  31                            snd_pcm_uframes_t appl_ptr);
  32 int snd_pcm_update_state(struct snd_pcm_substream *substream,
  33                          struct snd_pcm_runtime *runtime);
  34 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
  35
  36 void snd_pcm_playback_silence(struct snd_pcm_substream *substream,
  37                               snd_pcm_uframes_t new_hw_ptr);
  38
  39 static inline snd_pcm_uframes_t
  40 snd_pcm_avail(struct snd_pcm_substream *substream)
  41 {
  42         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  43                 return snd_pcm_playback_avail(substream->runtime);
  44         else
  45                 return snd_pcm_capture_avail(substream->runtime);
  46 }
  47
  48 static inline snd_pcm_uframes_t
  49 snd_pcm_hw_avail(struct snd_pcm_substream *substream)
  50 {
  51         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  52                 return snd_pcm_playback_hw_avail(substream->runtime);
  53         else
  54                 return snd_pcm_capture_hw_avail(substream->runtime);
  55 }
  56
  57 #ifdef CONFIG_SND_PCM_TIMER
  58 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
  59 void snd_pcm_timer_init(struct snd_pcm_substream *substream);
  60 void snd_pcm_timer_done(struct snd_pcm_substream *substream);
  61 #else
  62 static inline void
  63 snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}
  64 static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
  65 static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
  66 #endif
  67
  68 void __snd_pcm_xrun(struct snd_pcm_substream *substream);
  69
  70 #endif  /* __SOUND_CORE_PCM_LOCAL_H */