Initial version of tagcache! There are still some bugs in the engine

and much more problems with the UI.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9256 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 78 insertions, 0 deletions

diff --git a/apps/tagcache.h b/apps/tagcache.h
new file mode 100644
index 0000000000..a405764644
--- /dev/null
+++ b/apps/tagcache.h
@@ -0,0 +1,78 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 by Miika Pekkarinen
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef _TAGCACHE_H
+#define _TAGCACHE_H
+
+#include "id3.h"
+
+enum tag_type { tag_artist = 0, tag_album, tag_genre, tag_title,
+    tag_filename/*, tag_checksum*/ };
+#define TAG_COUNT 5
+
+#ifdef HAVE_DIRCACHE
+#define HAVE_TC_RAMCACHE 1
+#endif
+
+/* Allow a little drift to the filename ordering. */
+#define POS_HISTORY_COUNT 4
+
+/* How many entries we can create in one tag file (for sorting). */
+#define TAGFILE_MAX_ENTRIES  20000
+
+#define SEEK_LIST_SIZE 50
+#define TAGCACHE_MAX_FILTERS 3
+
+struct tagcache_search {
+    /* For internal use only. */
+    int fd;
+    long seek_list[SEEK_LIST_SIZE];
+    long filter_tag[TAGCACHE_MAX_FILTERS];
+    long filter_seek[TAGCACHE_MAX_FILTERS];
+    int filter_count;
+    int seek_list_count;
+    int seek_pos;
+    long position;
+    int entry_count;
+    bool valid;
+
+    /* Exported variables. */
+    bool ramsearch;
+    int type;
+    char *result;
+    int result_len;
+    long result_seek;
+};
+
+bool tagcache_fill_tags(struct mp3entry *id3, const char *filename);
+bool tagcache_search(struct tagcache_search *tcs, int tag);
+bool tagcache_search_add_filter(struct tagcache_search *tcs,
+                                int tag, int seek);
+bool tagcache_get_next(struct tagcache_search *tcs);
+void tagcache_search_finish(struct tagcache_search *tcs);
+
+int tagcache_get_progress(void);
+#ifdef HAVE_TC_RAMCACHE
+bool tagcache_is_ramcache(void);
+#endif
+void tagcache_init(void);
+void tagcache_start_scan(void);
+void tagcache_stop_scan(void);
+bool tagcache_force_update(void);
+
+#endif