static double
rb_random_by_age_and_rating_get_entry_weight (RBRandomPlayOrder *rorder, RhythmDB *db, RhythmDBEntry *entry)
{
time_t now;
gulong last_play;
gulong seconds_since_last_play = 0;
gdouble rating;
RhythmDBEntry *playing_entry;
/* This finds the log of the number of seconds since the last play.
* It handles never played automatically, since now-0 is a valid
* argument to log(). */
time (&now);
playing_entry = rb_play_order_get_playing_entry (RB_PLAY_ORDER (rorder));
if (playing_entry != entry) {
last_play = rhythmdb_entry_get_ulong (entry, RHYTHMDB_PROP_LAST_PLAYED);
seconds_since_last_play = now - last_play;
}
if (playing_entry != NULL)
rhythmdb_entry_unref (playing_entry);
/* The lowest weight should be 0. */
if (seconds_since_last_play < 1)
seconds_since_last_play = 1;
rating = rhythmdb_entry_get_double (entry, RHYTHMDB_PROP_RATING);
/* treat unrated as 2.5 for the purposes of probabilities */
if (rating < 0.01)
rating = 2.5;
return log (seconds_since_last_play) * (rating + 1.0);
}
RBPlayOrder *
rb_linear_play_order_new (RBShellPlayer *player)
{
RBLinearPlayOrder *lorder;
lorder = g_object_new (RB_TYPE_LINEAR_PLAY_ORDER,
"player", player,
NULL);
return RB_PLAY_ORDER (lorder);
}
RBPlayOrder *
rb_random_play_order_by_rating_new (RBShellPlayer *player)
{
RBRandomPlayOrderByRating *rorder;
rorder = g_object_new (RB_TYPE_RANDOM_PLAY_ORDER_BY_RATING,
"player", player,
NULL);
return RB_PLAY_ORDER (rorder);
}
