From 62b4a3ededd237f4b4850d91c052585e2f687499 Mon Sep 17 00:00:00 2001
From: quou <quou@disroot.org>
Date: Sun, 2 Jun 2024 21:46:07 +1000
Subject: Switched to luigi, parsing out FLAC metadata.

---
 library.c | 135 ++++++++++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 114 insertions(+), 21 deletions(-)

(limited to 'library.c')

diff --git a/library.c b/library.c
index 7459579..4eb4ab0 100644
--- a/library.c
+++ b/library.c
@@ -1,14 +1,9 @@
-#include <string.h>
-
 #include "library.h"
 #include "plat.h"
+#include <string.h>
+#include <stdio.h>
 
-void init_library(Library* l) {
-	int i;
-	l->song_count = 0;
-	for (i = 0; i < max_songs; i++)
-		l->songs[i].file[0] = 0;
-}
+#include "dr_flac.h"
 
 static unsigned hash(const char* s) {
 	const unsigned char* p = (const unsigned char*)s;
@@ -19,30 +14,128 @@ static unsigned hash(const char* s) {
 }
 
 Song* find_song(Library* l, const char* path) {
-	int i = hash(path) % max_songs;
+	int i = hash(path) % l->cap;
 	int c;
 	Song* s;
-	for (c = 0; c < max_songs; c++) {
+	for (c = 0; c < l->cap; c++) {
 		s = &l->songs[i];
-		if (!s->file[0] || !strcmp(path, s->file))
+		if (!s->path[0] || !strcmp(path, s->path))
 			return s;
 		i++;
-		i %= max_songs;
+		i %= l->cap;
 	}
 	return 0;
 }
 
-void add_song(void* l, const char* path) {
+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;
-	s = find_song(l, path);
-	if (!s) {
-		print_err("Too many songs!");
-		return;
+	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;
 	}
-	strcpy(s->file, path);
-	strcpy(s->name, path);
 }
 
-void build_library(Library* l, const char* path) {
-	iter_dir(path, add_song, l);
+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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