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#include "library.h"
#include "plat.h"
#include <string.h>
#include <stdio.h>
#include "dr_flac.h"
static unsigned hash(const char* s) {
const unsigned char* p = (const unsigned char*)s;
unsigned h = 2166136261;
while (*p)
h = (h ^ *p++) * 16777619;
return h;
}
Song* find_song(Library* l, const char* path) {
int i = hash(path) % l->cap;
int c;
Song* s;
for (c = 0; c < l->cap; c++) {
s = &l->songs[i];
if (!s->path[0] || !strcmp(path, s->path))
return s;
i++;
i %= l->cap;
}
return 0;
}
static void cap_iter(
void* uptr,
const char* path
) {
Library* lib = uptr;
(void)path;
lib->cap++;
}
static void adder_iter(
void* uptr,
const char* path
) {
Song* s;
Library* lib = uptr;
s = find_song(lib, path);
if (get_song_meta(path, s)) {
strcpy(s->path, path);
lib->indices[lib->cnt++] = s - lib->songs;
}
}
void build_library(
Arena* a,
Library* lib,
const char* path
) {
int i;
lib->cnt = lib->cap = 0;
iter_dir(path, cap_iter, lib);
lib->cap += 16;
lib->songs = arena_alloc(
a,
lib->cap * sizeof *lib->songs
);
lib->indices = arena_alloc(
a,
lib->cap * sizeof *lib->indices
);
for (i = 0; i < lib->cap; i++)
lib->songs[i].path[0] = 0;
iter_dir(path, adder_iter, lib);
}
void parse_vorbis_comment(
Song* s,
const char* com,
int len
) {
/* this is not safe xDDDD idrc */
if (len > 64) {
len = 64;
}
if (!memcmp(com, "ARTIST=", 7)) {
len -= 7;
memcpy(s->artist, com + 7, len);
s->artist[len] = 0;
} else if (!memcmp(com, "TITLE=", 6)) {
len -= 6;
memcpy(s->name, com + 6, len);
s->name[len] = 0;
} else if (!memcmp(com, "ALBUM=", 6)) {
len -= 6;
memcpy(s->album, com + 6, len);
s->album[len] = 0;
}
}
void flac_meta(
void* uptr,
drflac_metadata* m
) {
Song* s = uptr;
drflac_vorbis_comment_iterator i;
drflac_uint32 len;
const char* c;
int size;
switch (m->type) {
case DRFLAC_METADATA_BLOCK_TYPE_VORBIS_COMMENT:
drflac_init_vorbis_comment_iterator(
&i,
m->data.vorbis_comment.commentCount,
m->data.vorbis_comment.pComments
);
while ((c = drflac_next_vorbis_comment(
&i,
&len
))) {
parse_vorbis_comment(s, c, len);
}
break;
}
}
int get_song_meta(const char* path, Song* s) {
drflac* f;
f = drflac_open_file_with_metadata(
path,
flac_meta,
s,
0
);
if (f) {
drflac_close(f);
return 1;
}
s->path[0] = 0;
return 0;
}
#define DR_FLAC_IMPLEMENTATION
#include "dr_flac.h"
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