3 // frame-cache.c - maintainer of cache for data frame.
9 #include "frame-cache.h"
11 static void align_frames_in_i(struct frame_cache *cache,  in align_frames_in_i()  argument
14 	char *buf = cache->buf;  in align_frames_in_i()
18 	cache->remained_count -= consumed_count;  in align_frames_in_i()
20 	offset = cache->bytes_per_sample * cache->samples_per_frame *  in align_frames_in_i()
22 	size = cache->bytes_per_sample * cache->samples_per_frame *  in align_frames_in_i()
23 	       cache->remained_count;  in align_frames_in_i()
26 	cache->buf_ptr = buf + size;  in align_frames_in_i()
29 static void align_frames_in_n(struct frame_cache *cache,  in align_frames_in_n()  argument
32 	char **bufs = cache->buf;  in align_frames_in_n()
33 	char **buf_ptrs = cache->buf_ptr;  in align_frames_in_n()
38 	cache->remained_count -= consumed_count;  in align_frames_in_n()
40 	for (i = 0; i < cache->samples_per_frame; ++i) {  in align_frames_in_n()
41 		offset = cache->bytes_per_sample * consumed_count;  in align_frames_in_n()
42 		size = cache->bytes_per_sample * cache->remained_count;  in align_frames_in_n()
48 int frame_cache_init(struct frame_cache *cache, snd_pcm_access_t access,  in frame_cache_init()  argument
53 	cache->access = access;  in frame_cache_init()
54 	cache->remained_count = 0;  in frame_cache_init()
55 	cache->bytes_per_sample = bytes_per_sample;  in frame_cache_init()
56 	cache->samples_per_frame = samples_per_frame;  in frame_cache_init()
57 	cache->frames_per_cache = frames_per_cache;  in frame_cache_init()
60 		cache->align_frames = align_frames_in_i;  in frame_cache_init()
62 		cache->align_frames = align_frames_in_n;  in frame_cache_init()
73 		cache->buf = buf;  in frame_cache_init()
74 		cache->buf_ptr = buf;  in frame_cache_init()
80 		cache->buf = bufs;  in frame_cache_init()
81 		cache->buf_ptr = buf_ptrs;  in frame_cache_init()
96 	frame_cache_destroy(cache);  in frame_cache_init()
100 void frame_cache_destroy(struct frame_cache *cache)  in frame_cache_destroy()  argument
102 	if (cache->access == SND_PCM_ACCESS_RW_NONINTERLEAVED) {  in frame_cache_destroy()
103 		char **bufs = cache->buf;  in frame_cache_destroy()
106 			for (i = 0; i < cache->samples_per_frame; ++i)  in frame_cache_destroy()
109 		free(cache->buf_ptr);  in frame_cache_destroy()
111 	free(cache->buf);  in frame_cache_destroy()
112 	memset(cache, 0, sizeof(*cache));  in frame_cache_destroy()