Hello everybody,
I am currently practicing programming by writing a small music manager in
GTK+ and C. I spent the last two weeks reading Rhymthbox's source code
trying to figure out how to make my music manager software imports the songs
without playing them. Here is what I tried:
void import_media_activated(GtkMenuItem *item, GtkTreeView *treeview) {
GtkWidget *dialog;
GSList *fileuris, *filenames;
GstElement *fakeplay;
GstTagList *taglist = NULL;
GstMessage *msg;
const gchar *tag;
gint result;
dialog = gtk_file_chooser_dialog_new("Import File(s)...", NULL,
GTK_FILE_CHOOSER_ACTION_OPEN, GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OPEN, GTK_RESPONSE_OK, NULL);
gtk_file_chooser_set_select_multiple(GTK_FILE_CHOOSER(dialog), TRUE);
if (result == GTK_RESPONSE_OK) {
fileuris = gtk_file_chooser_get_uris(GTK_FILE_CHOOSER(dialog));
}
while (fileuris != NULL) {
fakeplay = gst_element_factory_make("playbin", "fakeplay");
g_object_set(G_OBJECT(fakeplay), "uri", fileuris->data, NULL);
gst_element_set_state(fakeplay, GST_STATE_PAUSED);
msg = gst_bus_timed_pop_filtered(GST_ELEMENT_BUS(fakeplay),
GST_CLOCK_TIME_NONE, GST_MESSAGE_TAG);
gst_message_parse_tag(msg, &taglist);
gchar* fileuri = (gchar*) fileuris->data;
insert_tag_on_mb_treeview(taglist, GTK_TREE_VIEW(mb_treeview),
g_filename_from_uri(fileuri, NULL, NULL));
fileuris = fileuris->next;
gst_message_unref(msg);
}
gtk_widget_destroy(dialog);
gst_element_set_state(fakeplay, GST_STATE_NULL);
gst_object_unref(fakeplay);
}
Basically I just created a playbin with each song, set its state to
GST_STATE_PAUSED and then get the GstTagList from the GstMessage of the
playbin.
However, this method is pretty resource-consuming and slow, especially when
I import like 1000+ songs (it crashed).
Therefore, I am just curious to know how the Rhythmbox team imported all the
songs without playing them? In other words, do you guys also set the song's
state to GST_STATE_PAUSED to import them, or do you use another way?
Thank you for reading my message!! I love using Rhythmbox and it really
inspired my small personal software!!
Have a good day!!
Best regards,
Phong Cao
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