Add initial db and mp3 scanner stuff
This commit is contained in:
Ron Pedde
parent
1c1a9e62f2
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231e37d3b8
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/*
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* $Id$
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* Implementation for simple in-memory linked list db
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*
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* Copyright (C) 2003 Ron Pedde (ron@pedde.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <errno.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <string.h>
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#include "mp3-scanner.h"
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/*
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* Typedefs
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*/
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typedef struct tag_mp3record {
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MP3FILE mp3file;
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struct tag_mp3record *next;
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} MP3RECORD;
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#define MAYBEFREE(a) { if((a)) free((a)); };
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/*
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* Globals
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*/
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MP3RECORD db_root;
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int db_version;
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int db_update_mode=0;
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pthread_rwlock_t db_rwlock=PTHREAD_RWLOCK_INITIALIZER;
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/*
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* Forwards
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*/
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int db_start_initial_update(void);
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int db_end_initial_update(void);
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int db_is_empty(void);
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int db_init(char *parameters);
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int db_deinit(void);
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int db_version(void);
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int db_add(MP3FILE *mp3file);
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void db_freerecord(MP3RECORD *mp3record);
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/*
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* db_init
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*
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* Initialize the database. For the in-memory db
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* the parameters are insignificant
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*/
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int db_init(char *parameters) {
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db_root.next=NULL;
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return 0;
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}
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/*
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* db_deinit
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*
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* Close the db, in this case freeing memory
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*/
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int db_deinit(void) {
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/* free used memory here */
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return 0;
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}
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/*
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* db_version
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*
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* return the db version
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*/
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int db_version(void) {
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return db_version;
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}
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/*
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* db_start_initial_update
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*
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* Set the db to bulk import mode
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*/
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int db_start_initial_update(void) {
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db_update_mode=1;
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return 0;
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}
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/*
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* db_end_initial_update
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*
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* Take the db out of bulk import mode
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*/
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int db_end_initial_update(void) {
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db_update_mode=0;
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return 0;
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}
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/*
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* db_is_empty
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*
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* See if the db is empty or not -- that is, should
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* the scanner start up in bulk update mode or in
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* background update mode
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*/
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int db_is_empty(void) {
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return db_root.next;
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}
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/*
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* db_add
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*
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* add an MP3 file to the database.
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*/
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int db_add(MP3FILE *mp3file) {
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int err;
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MP3RECORD *pnew;
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if(!pnew=(MP3RECORD*)malloc(sizeof(MP3RECORD))) {
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free(pnew);
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errno=ENOMEM;
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return -1;
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}
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memset(pnew,0,sizeof(MP3RECORD));
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memcpy(pnew->mp3file,mp3file,sizeof(MP3FILE));
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err=(int) pnew->mp3file.path=strdup(mp3file->path);
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err = err | pnew->mp3file.fname=strdup(mp3file->fname);
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err = err | pnew->mp3file.artist=strdup(mp3file->artist);
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err = err | pnew->mp3file.album=strdup(mp3file->album);
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err = err | pnew->mp3file.genre=strdup(mp3file->genre);
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if(err) {
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db_freerecord(pnew);
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errno=ENOMEM;
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return -1;
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}
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if(err=pthread_rwlock_wrlock(&db_wrlock)) {
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db_freerecord(pnew);
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errno=err;
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return -1;
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}
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pnew->next=root.next;
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root.next=pnew->next;
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pthread_rwlock_unlock(&db_wrlock);
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}
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/*
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* db_freerecord
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*
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* free a complete mp3record
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*/
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void db_freerecord(MP3RECORD *mp3record) {
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MAYBEFREE(mp3record->mp3file.path);
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MAYBEFREE(mp3record->mp3file.fname);
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MAYBEFREE(mp3record->mp3file.artist);
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MAYBEFREE(mp3record->mp3file.album);
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MAYBEFREE(mp3record->mp3file.genre);
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free(mp3record);
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}
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@ -0,0 +1,41 @@
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/*
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* $Id$
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* Header info for in-memory db
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*
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* Copyright (C) 2003 Ron Pedde (ron@pedde.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _DB_MEMORY_H_
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#define _DB_MEMORY_H_
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#include "mp3-scanner.h"
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typedef void* ENUMHANDLE;
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extern int db_start_initial_update(void);
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extern int db_end_initial_update(void);
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extern int db_is_empty(void);
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extern int db_init(char *parameters);
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extern int db_deinit(void);
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extern int db_version(void);
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extern int db_add(MP3FILE *mp3file);
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extern ENUMHANDLE db_enum_begin(void);
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extern MP3FILE *db_enum(ENUMHANDLE *current);
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extern int db_enum_end(ENUMHANDLE current);
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extern MP3FILE *db_find(int id);
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#endif /* _DB_MEMORY_H_ */
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@ -0,0 +1,34 @@
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/*
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* $Id$
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* Header file for mp3 scanner and monitor
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*
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* Copyright (C) 2003 Ron Pedde (ron@pedde.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _MP3_SCANNER_H_
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#define _MP3_SCANNER_H_
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typedef struct tag_mp3file {
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char *path;
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char *fname;
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char *artist;
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char *album;
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char *genre;
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int id;
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} MP3FILE;
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#endif /* _MP3_SCANNER_H_ */
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