--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pcmu2efr/pcmu-input.c	Sun May 12 04:48:36 2024 +0000
@@ -0,0 +1,38 @@
+/*
+ * This program emits the full sequence (3 EHFs and 2 copies of seqsyncu)
+ * that needs to be fed to TRAU DL input from G.711 PCMU side to perform
+ * the test of reversing the EFR variant used and finding frame sync.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+
+extern const uint8_t seqsyncu_last_frame[160];
+
+main(argc, argv)
+	char **argv;
+{
+	FILE *outf;
+	uint8_t ehf[160];
+
+	if (argc != 2) {
+		fprintf(stderr, "usage: %s pcmu-out-file\n", argv[0]);
+		exit(1);
+	}
+	outf = fopen(argv[1], "w");
+	if (!outf) {
+		perror(argv[1]);
+		exit(1);
+	}
+	memset(ehf, 0xFE, 160);
+	fwrite(ehf, 1, 160, outf);
+	fwrite(ehf, 1, 160, outf);
+	fwrite(ehf, 1, 160, outf);
+	fwrite(seqsyncu_last_frame, 1, 160, outf);
+	fwrite(seqsyncu_last_frame, 1, 160, outf);
+	fclose(outf);
+	exit(0);
+}