output_all: reset elapsed_time at song border

src/output_all.c

@@ -558,6 +558,14 @@ audio_output_all_close(void)
 	audio_output_all_elapsed_time = -1.0;
 }
 
+void
+audio_output_all_song_border(void)
+{
+	/* clear the elapsed_time pointer at the beginning of a new
+	   song */
+	audio_output_all_elapsed_time = 0.0;
+}
+
 float
 audio_output_all_get_elapsed_time(void)
 {

src/output_all.h

@@ -142,6 +142,12 @@ void
 audio_output_all_cancel(void);
 
 /**
+ * Indicate that a new song will begin now.
+ */
+void
+audio_output_all_song_border(void);
+
+/**
  * Returns the "elapsed_time" stamp of the most recently finished
  * chunk.  A negative value is returned when no chunk has been
  * finished yet.

src/player_thread.c

@@ -736,6 +736,8 @@ player_song_border(struct player *player)
 	music_pipe_free(player->pipe);
 	player->pipe = player->dc->pipe;
 
+	audio_output_all_song_border();
+
 	if (!player_wait_for_decoder(player))
 		return false;