mirror of
https://github.com/alsa-project/alsa-utils
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48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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//
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// frame-cache.h - maintainer of cache for data frame.
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//
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// Copyright (c) 2018 Takashi Sakamoto <o-takashi@sakamocchi.jp>
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//
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// Licensed under the terms of the GNU General Public License, version 2.
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#include <alsa/asoundlib.h>
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struct frame_cache {
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void *buf;
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void *buf_ptr;
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unsigned int remained_count;
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snd_pcm_access_t access;
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unsigned int bytes_per_sample;
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unsigned int samples_per_frame;
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unsigned int frames_per_cache;
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void (*align_frames)(struct frame_cache *cache,
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unsigned int consumed_count);
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};
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int frame_cache_init(struct frame_cache *cache, snd_pcm_access_t access,
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unsigned int bytes_per_sample,
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unsigned int samples_per_frame,
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unsigned int frames_per_cache);
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void frame_cache_destroy(struct frame_cache *cache);
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static inline unsigned int frame_cache_get_count(struct frame_cache *cache)
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{
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return cache->remained_count;
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}
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static inline void frame_cache_increase_count(struct frame_cache *cache,
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unsigned int frame_count)
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{
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cache->remained_count += frame_count;
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}
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static inline void frame_cache_reduce(struct frame_cache *cache,
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unsigned int consumed_count)
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{
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cache->align_frames(cache, consumed_count);
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}
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