/*************************************************************************** * __________ __ ___. * 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_composer, tag_year, tag_tracknumber, tag_bitrate, tag_length, tag_playcount, tag_playtime, tag_lastplayed, /* Virtual tags */ tag_virt_autoscore }; #define TAG_COUNT 13 /* Allow a little drift to the filename ordering (should not be too high/low). */ #define POS_HISTORY_COUNT 4 /* How much to pre-load entries while committing to prevent seeking. */ #define IDX_BUF_DEPTH 64 /* Tag Cache Header version 'TCHxx'. Increment when changing internal structures. */ #define TAGCACHE_MAGIC 0x54434806 /* How much to allocate extra space for ramcache. */ #define TAGCACHE_RESERVE 32768 /** * Define how long one entry must be at least (longer -> less memory at commit). * Must be at least 4 bytes in length for correct alignment. */ #define TAGFILE_ENTRY_CHUNK_LENGTH 8 /* Used to guess the necessary buffer size at commit. */ #define TAGFILE_ENTRY_AVG_LENGTH 16 /* How many entries to fetch to the seek table at once while searching. */ #define SEEK_LIST_SIZE 32 /* Always strict align entries for best performance and binary compatability. */ #define TAGCACHE_STRICT_ALIGN 1 #define TAGCACHE_MAX_FILTERS 4 #define TAGCACHE_MAX_CLAUSES 16 /* Tag database files. */ #define TAGCACHE_FILE_TEMP ROCKBOX_DIR "/tagcache_tmp.tcd" #define TAGCACHE_FILE_MASTER ROCKBOX_DIR "/tagcache_idx.tcd" #define TAGCACHE_FILE_INDEX ROCKBOX_DIR "/tagcache_%d.tcd" #define TAGCACHE_FILE_CHANGELOG ROCKBOX_DIR "/tagcache_changelog.txt" #define TAGCACHE_STATEFILE ROCKBOX_DIR "/tagcache_state.tcd" /* Flags */ #define FLAG_DELETED 0x0001 /* Entry has been removed from db */ #define FLAG_DIRCACHE 0x0002 /* Filename is a dircache pointer */ #define FLAG_DIRTYNUM 0x0004 /* Numeric data has been modified */ #define FLAG_GET_ATTR(flag) ((flag >> 16) & 0x0000ffff) #define FLAG_SET_ATTR(flag,attr) flag = (flag & 0x0000ffff) | (attr << 16) enum clause { clause_none, clause_is, clause_is_not, clause_gt, clause_gteq, clause_lt, clause_lteq, clause_contains, clause_not_contains, clause_begins_with, clause_not_begins_with, clause_ends_with, clause_not_ends_with }; struct tagcache_stat { bool initialized; /* Is tagcache currently busy? */ bool ready; /* Is tagcache ready to be used? */ bool ramcache; /* Is tagcache loaded in ram? */ bool commit_delayed; /* Has commit been delayed until next reboot? */ int commit_step; /* Commit progress */ int ramcache_allocated; /* Has ram been allocated for ramcache? */ int ramcache_used; /* How much ram has been really used */ int progress; /* Current progress of disk scan */ int processed_entries; /* Scanned disk entries so far */ }; struct tagcache_search_clause { int tag; int type; bool numeric; bool input; long numeric_data; char str[32]; }; struct tagcache_search { /* For internal use only. */ int fd, masterfd; int idxfd[TAG_COUNT]; long seek_list[SEEK_LIST_SIZE]; long seek_flags[SEEK_LIST_SIZE]; long filter_tag[TAGCACHE_MAX_FILTERS]; long filter_seek[TAGCACHE_MAX_FILTERS]; int filter_count; struct tagcache_search_clause *clause[TAGCACHE_MAX_CLAUSES]; int clause_count; int seek_list_count; int seek_pos; long position; int entry_count; bool valid; bool initialized; long *unique_list; int unique_list_capacity; int unique_list_count; /* Exported variables. */ bool ramsearch; bool ramresult; int type; char *result; int result_len; long result_seek; int idx_id; }; int tagcache_str_to_tag(const char *str); const char* tagcache_tag_to_str(int tag); bool tagcache_is_numeric_tag(int type); bool tagcache_is_unique_tag(int type); bool tagcache_is_sorted_tag(int type); bool tagcache_find_index(struct tagcache_search *tcs, const char *filename); bool tagcache_search(struct tagcache_search *tcs, int tag); void tagcache_search_set_uniqbuf(struct tagcache_search *tcs, void *buffer, long length); bool tagcache_search_add_filter(struct tagcache_search *tcs, int tag, int seek); bool tagcache_search_add_clause(struct tagcache_search *tcs, struct tagcache_search_clause *clause); bool tagcache_get_next(struct tagcache_search *tcs); bool tagcache_retrieve(struct tagcache_search *tcs, int idxid, char *buf, long size); void tagcache_search_finish(struct tagcache_search *tcs); long tagcache_get_numeric(const struct tagcache_search *tcs, int tag); long tagcache_increase_serial(void); long tagcache_get_serial(void); bool tagcache_import_changelog(void); bool tagcache_create_changelog(struct tagcache_search *tcs); bool tagcache_modify_numeric_entry(struct tagcache_search *tcs, int tag, long data); struct tagcache_stat* tagcache_get_stat(void); int tagcache_get_commit_step(void); bool tagcache_prepare_shutdown(void); void tagcache_shutdown(void); #ifdef HAVE_TC_RAMCACHE bool tagcache_is_ramcache(void); bool tagcache_fill_tags(struct mp3entry *id3, const char *filename); void tagcache_unload_ramcache(void); #endif void tagcache_init(void); bool tagcache_is_initialized(void); void tagcache_start_scan(void); void tagcache_stop_scan(void); bool tagcache_update(void); bool tagcache_rebuild(void); #endif