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_constraint_mask(struct snd_pcm_runtime *runtime,
  24                                snd_pcm_hw_param_t var, u_int32_t mask);
  25
  26 int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream,
  27                            snd_pcm_uframes_t appl_ptr);
  28 int snd_pcm_update_state(struct snd_pcm_substream *substream,
  29                          struct snd_pcm_runtime *runtime);
  30 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
  31
  32 void snd_pcm_playback_silence(struct snd_pcm_substream *substream);
  33
  34 static inline snd_pcm_uframes_t
  35 snd_pcm_avail(struct snd_pcm_substream *substream)
  36 {
  37         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  38                 return snd_pcm_playback_avail(substream->runtime);
  39         else
  40                 return snd_pcm_capture_avail(substream->runtime);
  41 }
  42
  43 static inline snd_pcm_uframes_t
  44 snd_pcm_hw_avail(struct snd_pcm_substream *substream)
  45 {
  46         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  47                 return snd_pcm_playback_hw_avail(substream->runtime);
  48         else
  49                 return snd_pcm_capture_hw_avail(substream->runtime);
  50 }
  51
  52 #ifdef CONFIG_SND_PCM_TIMER
  53 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
  54 void snd_pcm_timer_init(struct snd_pcm_substream *substream);
  55 void snd_pcm_timer_done(struct snd_pcm_substream *substream);
  56 #else
  57 static inline void
  58 snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}
  59 static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
  60 static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
  61 #endif
  62
  63 void __snd_pcm_xrun(struct snd_pcm_substream *substream);
  64 void snd_pcm_group_init(struct snd_pcm_group *group);
  65 void snd_pcm_sync_stop(struct snd_pcm_substream *substream, bool sync_irq);
  66
  67 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
  68
  69 /* loop over all PCM substreams */
  70 #define for_each_pcm_substream(pcm, str, subs) \
  71         for ((str) = 0; (str) < 2; (str)++) \
  72                 for ((subs) = (pcm)->streams[str].substream; (subs); \
  73                      (subs) = (subs)->next)
  74
  75 static inline void snd_pcm_dma_buffer_sync(struct snd_pcm_substream *substream,
  76                                            enum snd_dma_sync_mode mode)
  77 {
  78         if (substream->runtime->info & SNDRV_PCM_INFO_EXPLICIT_SYNC)
  79                 snd_dma_buffer_sync(snd_pcm_get_dma_buf(substream), mode);
  80 }
  81
  82 #endif  /* __SOUND_CORE_PCM_LOCAL_H */