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 */ 71