LXR linux/sound/core/pcm

   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
  12extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
  13
  14void snd_interval_mul(const struct snd_interval *a,
  15                      const struct snd_interval *b, struct snd_interval *c);
  16void snd_interval_div(const struct snd_interval *a,
  17                      const struct snd_interval *b, struct snd_interval *c);
  18void snd_interval_muldivk(const struct snd_interval *a,
  19                          const struct snd_interval *b,
  20                          unsigned int k, struct snd_interval *c);
  21void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
  22                          const struct snd_interval *b, struct snd_interval *c);
  23
  24int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
  25int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
  26
  27int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime,
  28                               snd_pcm_hw_param_t var, u_int32_t mask);
  29
  30int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream,
  31                           snd_pcm_uframes_t appl_ptr);
  32int snd_pcm_update_state(struct snd_pcm_substream *substream,
  33                         struct snd_pcm_runtime *runtime);
  34int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
  35
  36void snd_pcm_playback_silence(struct snd_pcm_substream *substream,
  37                              snd_pcm_uframes_t new_hw_ptr);
  38
  39static inline snd_pcm_uframes_t
  40snd_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
  48static inline snd_pcm_uframes_t
  49snd_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
  58void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
  59void snd_pcm_timer_init(struct snd_pcm_substream *substream);
  60void snd_pcm_timer_done(struct snd_pcm_substream *substream);
  61#else
  62static inline void
  63snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}
  64static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
  65static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
  66#endif
  67
  68void __snd_pcm_xrun(struct snd_pcm_substream *substream);
  69void snd_pcm_group_init(struct snd_pcm_group *group);
  70
  71#endif  /* __SOUND_CORE_PCM_LOCAL_H */
  72