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       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                 :          0 : snd_pcm_avail(struct snd_pcm_substream *substream)
      40                 :            : {
      41                 :          0 :         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
      42                 :          0 :                 return snd_pcm_playback_avail(substream->runtime);
      43                 :            :         else
      44                 :          0 :                 return snd_pcm_capture_avail(substream->runtime);
      45                 :            : }
      46                 :            : 
      47                 :            : static inline snd_pcm_uframes_t
      48                 :          0 : snd_pcm_hw_avail(struct snd_pcm_substream *substream)
      49                 :            : {
      50                 :          0 :         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
      51                 :          0 :                 return snd_pcm_playback_hw_avail(substream->runtime);
      52                 :            :         else
      53                 :          0 :                 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                 :            : #endif  /* __SOUND_CORE_PCM_LOCAL_H */