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 snd_pcm_uframes_t new_hw_ptr); 34 35 static inline snd_pcm_uframes_t 36 snd_pcm_avail(struct snd_pcm_substream *substream) 37 { 38 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 39 return snd_pcm_playback_avail(substream->runtime); 40 else 41 return snd_pcm_capture_avail(substream->runtime); 42 } 43 44 static inline snd_pcm_uframes_t 45 snd_pcm_hw_avail(struct snd_pcm_substream *substream) 46 { 47 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 48 return snd_pcm_playback_hw_avail(substream->runtime); 49 else 50 return snd_pcm_capture_hw_avail(substream->runtime); 51 } 52 53 #ifdef CONFIG_SND_PCM_TIMER 54 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); 55 void snd_pcm_timer_init(struct snd_pcm_substream *substream); 56 void snd_pcm_timer_done(struct snd_pcm_substream *substream); 57 #else 58 static inline void 59 snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {} 60 static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {} 61 static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {} 62 #endif 63 64 void __snd_pcm_xrun(struct snd_pcm_substream *substream); 65 void snd_pcm_group_init(struct snd_pcm_group *group); 66 void snd_pcm_sync_stop(struct snd_pcm_substream *substream, bool sync_irq); 67 68 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) 69 70 /* loop over all PCM substreams */ 71 #define for_each_pcm_substream(pcm, str, subs) \ 72 for ((str) = 0; (str) < 2; (str)++) \ 73 for ((subs) = (pcm)->streams[str].substream; (subs); \ 74 (subs) = (subs)->next) 75 76 #endif /* __SOUND_CORE_PCM_LOCAL_H */ 77