Fix OGG audio loop offset pop.

Co-authored-by: MJacred <loesch.benny92@gmx.de>
Co-authored-by: Ellen Poe <ellen.h.poe@gmail.com>
Co-authored-by: Michael Wörner <mwoerner@semw-software.com>

modules/ogg/ogg_packet_sequence.h

@@ -120,6 +120,13 @@ public:
 	// Returns true on success, false on failure.
 	bool seek_page(int64_t p_granule_pos);
 
+	// Gets the current page number.
+	int64_t get_page_number() const;
+
+	// Moves to a specific page in the stream.
+	// Returns true on success, false if the page number is out of bounds.
+	bool set_page_number(int64_t p_page_number);
+
 	OggPacketSequencePlayback();
 	virtual ~OggPacketSequencePlayback();
 };