--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/compal/melody-extr/extr-onemel.c	Fri Apr 01 06:03:47 2022 +0000
@@ -0,0 +1,84 @@
+/*
+ * This program is our attempt at extracting built-in melodies
+ * from Mot C1xx firmware images.
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+FILE *binf;
+int freq_offset;
+unsigned time_factor;
+
+char *note_names[48] = {
+	"f4","fs4","g4","gs4","a4","as4","b4", "c5","cs5","d5","ds5","e5",
+	"f5","fs5","g5","gs5","a5","as5","b5", "c6","cs6","d6","ds6","e6",
+	"f6","fs6","g6","gs6","a6","as6","b6", "c7","cs7","d7","ds7","e7",
+	"f7","fs7","g7","gs7","a7","as7","b7", "c8","cs8","d8","ds8","e8"
+};
+
+open_and_seek_input(binfname, offset_arg)
+	char *binfname, *offset_arg;
+{
+	u_long offset;
+
+	binf = fopen(binfname, "r");
+	if (!binf) {
+		perror(binfname);
+		exit(1);
+	}
+	offset = strtoul(offset_arg, 0, 0);
+	fseek(binf, offset, SEEK_SET);
+}
+
+process_record()
+{
+	u_char record[4];
+	int note, vol_adj;
+	unsigned duration;
+
+	if (fread(&record, sizeof record, 1, binf) != 1) {
+		fprintf(stderr, "error reading from binary file\n");
+		exit(1);
+	}
+	duration = record[0] * time_factor + 1;
+	if (record[2]) {
+		note = record[2] + freq_offset;
+		if (note < 1 || note > 48) {
+			fprintf(stderr, "error: note is out of range\n");
+			exit(1);
+		}
+		note--;
+		printf("%s\t64\t%u", note_names[note], duration);
+		vol_adj = record[1];
+		if (vol_adj) {
+			if (vol_adj >= 128)
+				vol_adj -= 256;
+			printf("\t# Vol %+d", vol_adj);
+		}
+		fputs("\nrest\t\t2\n", stdout);
+	} else {
+		printf("rest\t\t%u\n", duration);
+	}
+}
+
+main(argc, argv)
+	char **argv;
+{
+	unsigned n, num_entries;
+
+	if (argc != 6) {
+		fprintf(stderr,
+	"usage: %s fw-image-file file-offset num-entries freq-off time-mult\n",
+			argv[0]);
+		exit(1);
+	}
+	open_and_seek_input(argv[1], argv[2]);
+	num_entries = strtoul(argv[3], 0, 0);
+	freq_offset = atoi(argv[4]);
+	time_factor = atoi(argv[5]);
+	for (n = 0; n < num_entries; n++)
+		process_record();
+	exit(0);
+}