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37af81c599
This patch introduces the ops table to each memory allocation type (SNDRV_DMA_TYPE_XXX) and abstract the handling for the better code management. Then we get separate the page allocation, release and other tasks for each type, especially for the SG buffer. Each buffer type has now callbacks in the struct snd_malloc_ops, and the common helper functions call those ops accordingly. The former inline code that is specific to SG-buffer is moved into the local sgbuf.c, and we can simplify the PCM code without details of memory handling. Link: https://lore.kernel.org/r/20210609162551.7842-4-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* pcm_local.h - a local header file for snd-pcm module.
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*
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* Copyright (c) Takashi Sakamoto <o-takashi@sakamocchi.jp>
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*/
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#ifndef __SOUND_CORE_PCM_LOCAL_H
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#define __SOUND_CORE_PCM_LOCAL_H
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extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
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void snd_interval_mul(const struct snd_interval *a,
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const struct snd_interval *b, struct snd_interval *c);
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void snd_interval_div(const struct snd_interval *a,
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const struct snd_interval *b, struct snd_interval *c);
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void snd_interval_muldivk(const struct snd_interval *a,
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const struct snd_interval *b,
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unsigned int k, struct snd_interval *c);
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void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
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const struct snd_interval *b, struct snd_interval *c);
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int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime,
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snd_pcm_hw_param_t var, u_int32_t mask);
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int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream,
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snd_pcm_uframes_t appl_ptr);
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int snd_pcm_update_state(struct snd_pcm_substream *substream,
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struct snd_pcm_runtime *runtime);
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int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
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void snd_pcm_playback_silence(struct snd_pcm_substream *substream,
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snd_pcm_uframes_t new_hw_ptr);
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static inline snd_pcm_uframes_t
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snd_pcm_avail(struct snd_pcm_substream *substream)
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{
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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return snd_pcm_playback_avail(substream->runtime);
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else
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return snd_pcm_capture_avail(substream->runtime);
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}
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static inline snd_pcm_uframes_t
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snd_pcm_hw_avail(struct snd_pcm_substream *substream)
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{
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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return snd_pcm_playback_hw_avail(substream->runtime);
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else
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return snd_pcm_capture_hw_avail(substream->runtime);
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}
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#ifdef CONFIG_SND_PCM_TIMER
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void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
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void snd_pcm_timer_init(struct snd_pcm_substream *substream);
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void snd_pcm_timer_done(struct snd_pcm_substream *substream);
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#else
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static inline void
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snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}
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static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
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static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
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#endif
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void __snd_pcm_xrun(struct snd_pcm_substream *substream);
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void snd_pcm_group_init(struct snd_pcm_group *group);
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void snd_pcm_sync_stop(struct snd_pcm_substream *substream, bool sync_irq);
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#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
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/* loop over all PCM substreams */
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#define for_each_pcm_substream(pcm, str, subs) \
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for ((str) = 0; (str) < 2; (str)++) \
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for ((subs) = (pcm)->streams[str].substream; (subs); \
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(subs) = (subs)->next)
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#endif /* __SOUND_CORE_PCM_LOCAL_H */
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