| | 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 | static inline void snd_pcm_dma_buffer_sync(struct snd_pcm_substream *substream, |
| | 77 | enum snd_dma_sync_mode mode) |
| | 78 | { |
| | 79 | if (substream->runtime->info & SNDRV_PCM_INFO_EXPLICIT_SYNC) |
| | 80 | snd_dma_buffer_sync(snd_pcm_get_dma_buf(substream), mode); |
| | 81 | } |
| | 82 | |
| | 83 | #endif /* __SOUND_CORE_PCM_LOCAL_H */ |
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