--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgsmfr2/pp_homing.c	Thu Sep 19 06:42:01 2024 +0000
@@ -0,0 +1,19 @@
+/*
+ * gsmfr_preproc_good_frame_hm() is a wrapper around gsmfr_preproc_good_frame()
+ * that adds homing of the Rx DTX handler preprocessor block.  This homing
+ * version of good frame preproc is not used in the full decoder (the latter
+ * implements its own homing logic as specified by 3GPP), but it will be used
+ * when our Rx DTX handler preprocessor functions as a TFO transform.
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include "tw_gsmfr.h"
+
+void gsmfr_preproc_good_frame_hm(struct gsmfr_preproc_state *st, uint8_t *frame)
+{
+	if (memcmp(frame, gsmfr_decoder_homing_frame, GSMFR_RTP_FRAME_LEN))
+		gsmfr_preproc_good_frame(st, frame);
+	else
+		gsmfr_preproc_reset(st);
+}