src/playlist_song.c

   1 /*
   2  * Copyright (C) 2003-2010 The Music Player Daemon Project
   3  * http://www.musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #include "config.h"
  21 #include "playlist_song.h"
  22 #include "database.h"
  23 #include "mapper.h"
  24 #include "song.h"
  25 #include "uri.h"
  26 #include "ls.h"
  27 #include "tag.h"
  28
  29 #include <assert.h>
  30 #include <string.h>
  31
  32 static void
  33 merge_song_metadata(struct song *dest, const struct song *base,
  34                     const struct song *add)
  35 {
  36         dest->tag = base->tag != NULL
  37                 ? (add->tag != NULL
  38                    ? tag_merge(base->tag, add->tag)
  39                    : tag_dup(base->tag))
  40                 : (add->tag != NULL
  41                    ? tag_dup(add->tag)
  42                    : NULL);
  43
  44         dest->mtime = base->mtime;
  45         dest->start_ms = add->start_ms;
  46         dest->end_ms = add->end_ms;
  47 }
  48
  49 static struct song *
  50 apply_song_metadata(struct song *dest, const struct song *src)
  51 {
  52         struct song *tmp;
  53
  54         assert(dest != NULL);
  55         assert(src != NULL);
  56
  57         if (src->tag == NULL && src->start_ms == 0 && src->end_ms == 0)
  58                 return dest;
  59
  60         if (song_in_database(dest)) {
  61                 char *path_fs = map_song_fs(dest);
  62                 if (path_fs == NULL)
  63                         return dest;
  64
  65                 tmp = song_file_new(path_fs, NULL);
  66                 merge_song_metadata(tmp, dest, src);
  67         } else {
  68                 tmp = song_file_new(dest->uri, NULL);
  69                 merge_song_metadata(tmp, dest, src);
  70                 song_free(dest);
  71         }
  72
  73         return tmp;
  74 }
  75
  76 struct song *
  77 playlist_check_translate_song(struct song *song, const char *base_uri)
  78 {
  79         struct song *dest;
  80
  81         if (song_in_database(song))
  82                 /* already ok */
  83                 return song;
  84
  85         char *uri = song->uri;
  86
  87         if (uri_has_scheme(uri)) {
  88                 if (uri_supported_scheme(uri))
  89                         /* valid remote song */
  90                         return song;
  91                 else {
  92                         /* unsupported remote song */
  93                         song_free(song);
  94                         return NULL;
  95                 }
  96         }
  97
  98         if (g_path_is_absolute(uri)) {
  99                 /* XXX fs_charset vs utf8? */
 100                 char *prefix = base_uri != NULL
 101                         ? map_uri_fs(base_uri)
 102                         : map_directory_fs(db_get_root());
 103
 104                 if (prefix == NULL || !g_str_has_prefix(uri, prefix) ||
 105                     uri[strlen(prefix)] != '/') {
 106                         /* local files must be relative to the music
 107                            directory */
 108                         g_free(prefix);
 109                         song_free(song);
 110                         return NULL;
 111                 }
 112
 113                 uri += strlen(prefix) + 1;
 114                 g_free(prefix);
 115         }
 116
 117         if (base_uri != NULL)
 118                 uri = g_build_filename(base_uri, uri, NULL);
 119         else
 120                 uri = g_strdup(uri);
 121
 122         if (uri_has_scheme(base_uri)) {
 123                 dest = song_remote_new(uri);
 124                 g_free(uri);
 125         } else {
 126                 dest = db_get_song(uri);
 127                 g_free(uri);
 128                 if (dest == NULL) {
 129                         /* not found in database */
 130                         song_free(song);
 131                         return dest;
 132                 }
 133         }
 134
 135         dest = apply_song_metadata(dest, song);
 136         song_free(song);
 137
 138         return dest;
 139 }