--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hrutil/read-dec.c	Fri Aug 30 08:27:05 2024 +0000
@@ -0,0 +1,48 @@
+/*
+ * In this module we implement the utility function for reading ETSI
+ * GSM-HR *.dec files in either LE or BE format.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include "../libgsmhr1/tw_gsmhr.h"
+
+read_dec_frame(inf, big_endian, params, filename_for_errs, frame_no)
+	FILE *inf;
+	int16_t *params;
+	char *filename_for_errs;
+	unsigned frame_no;
+{
+	uint8_t file_bytes[GSMHR_NUM_PARAMS_DEC * 2], *sp;
+	int cc;
+	unsigned n;
+	uint16_t val;
+
+	cc = fread(file_bytes, 2, GSMHR_NUM_PARAMS_DEC, inf);
+	if (cc == 0)
+		return 0;
+	if (cc != GSMHR_NUM_PARAMS_DEC) {
+		fprintf(stderr, "error: short read from %s\n",
+			filename_for_errs);
+		exit(1);
+	}
+	sp = file_bytes;
+	for (n = 0; n < GSMHR_NUM_PARAMS_DEC; n++) {
+		if (big_endian)
+			val = ((uint16_t) sp[0] << 8) | ((uint16_t) sp[1]);
+		else
+			val = ((uint16_t) sp[1] << 8) | ((uint16_t) sp[0]);
+		params[n] = val;
+		sp += 2;
+	}
+	if (gsmhr_check_decoder_params(params) < 0) {
+		fprintf(stderr,
+			"error in %s frame #%u: wrong format or wrong endian\n",
+			filename_for_errs, frame_no);
+		exit(1);
+	}
+	return 1;
+}