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 #endif /* __SOUND_CORE_PCM_LOCAL_H */ 71