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-rw-r--r--src/song_update.c198
1 files changed, 198 insertions, 0 deletions
diff --git a/src/song_update.c b/src/song_update.c
new file mode 100644
index 000000000..b418b600e
--- /dev/null
+++ b/src/song_update.c
@@ -0,0 +1,198 @@
+/*
+ * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h" /* must be first for large file support */
+#include "song.h"
+#include "uri.h"
+#include "directory.h"
+#include "mapper.h"
+#include "decoder_list.h"
+#include "decoder_plugin.h"
+#include "tag_ape.h"
+#include "tag_id3.h"
+#include "tag.h"
+#include "input_stream.h"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+
+struct song *
+song_file_load(const char *path, struct directory *parent)
+{
+ struct song *song;
+ bool ret;
+
+ assert((parent == NULL) == g_path_is_absolute(path));
+ assert(!uri_has_scheme(path));
+ assert(strchr(path, '\n') == NULL);
+
+ song = song_file_new(path, parent);
+
+ //in archive ?
+ if (parent != NULL && parent->device == DEVICE_INARCHIVE) {
+ ret = song_file_update_inarchive(song);
+ } else {
+ ret = song_file_update(song);
+ }
+ if (!ret) {
+ song_free(song);
+ return NULL;
+ }
+
+ return song;
+}
+
+/**
+ * Attempts to load APE or ID3 tags from the specified file.
+ */
+static struct tag *
+tag_load_fallback(const char *path)
+{
+ struct tag *tag = tag_ape_load(path);
+ if (tag == NULL)
+ tag = tag_id3_load(path);
+ return tag;
+}
+
+/**
+ * The decoder plugin failed to load any tags: fall back to the APE or
+ * ID3 tag loader.
+ */
+static struct tag *
+tag_fallback(const char *path, struct tag *tag)
+{
+ struct tag *fallback = tag_load_fallback(path);
+
+ if (fallback != NULL) {
+ /* tag was successfully loaded: copy the song
+ duration, and destroy the old (empty) tag */
+ fallback->time = tag->time;
+ tag_free(tag);
+ return fallback;
+ } else
+ /* no APE/ID3 tag found: return the empty tag */
+ return tag;
+}
+
+bool
+song_file_update(struct song *song)
+{
+ const char *suffix;
+ char *path_fs;
+ const struct decoder_plugin *plugin;
+ struct stat st;
+ struct input_stream *is = NULL;
+
+ assert(song_is_file(song));
+
+ /* check if there's a suffix and a plugin */
+
+ suffix = uri_get_suffix(song->uri);
+ if (suffix == NULL)
+ return false;
+
+ plugin = decoder_plugin_from_suffix(suffix, NULL);
+ if (plugin == NULL)
+ return false;
+
+ path_fs = map_song_fs(song);
+ if (path_fs == NULL)
+ return false;
+
+ if (song->tag != NULL) {
+ tag_free(song->tag);
+ song->tag = NULL;
+ }
+
+ if (stat(path_fs, &st) < 0 || !S_ISREG(st.st_mode)) {
+ g_free(path_fs);
+ return false;
+ }
+
+ song->mtime = st.st_mtime;
+
+ do {
+ /* load file tag */
+ song->tag = decoder_plugin_tag_dup(plugin, path_fs);
+ if (song->tag != NULL)
+ break;
+
+ /* fall back to stream tag */
+ if (plugin->stream_tag != NULL) {
+ /* open the input_stream (if not already
+ open) */
+ if (is == NULL)
+ is = input_stream_open(path_fs, NULL);
+
+ /* now try the stream_tag() method */
+ if (is != NULL) {
+ song->tag = decoder_plugin_stream_tag(plugin,
+ is);
+ if (song->tag != NULL)
+ break;
+
+ input_stream_seek(is, 0, SEEK_SET, NULL);
+ }
+ }
+
+ plugin = decoder_plugin_from_suffix(suffix, plugin);
+ } while (plugin != NULL);
+
+ if (is != NULL)
+ input_stream_close(is);
+
+ if (song->tag != NULL && tag_is_empty(song->tag))
+ song->tag = tag_fallback(path_fs, song->tag);
+
+ g_free(path_fs);
+ return song->tag != NULL;
+}
+
+bool
+song_file_update_inarchive(struct song *song)
+{
+ const char *suffix;
+ const struct decoder_plugin *plugin;
+
+ assert(song_is_file(song));
+
+ /* check if there's a suffix and a plugin */
+
+ suffix = uri_get_suffix(song->uri);
+ if (suffix == NULL)
+ return false;
+
+ plugin = decoder_plugin_from_suffix(suffix, false);
+ if (plugin == NULL)
+ return false;
+
+ if (song->tag != NULL)
+ tag_free(song->tag);
+
+ //accept every file that has music suffix
+ //because we dont support tag reading throught
+ //input streams
+ song->tag = tag_new();
+
+ return true;
+}