--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ater8/activate.c	Fri Aug 30 19:02:42 2024 +0000
@@ -0,0 +1,89 @@
+/*
+ * Here we implement the operation of activating a new TRAU channel
+ * on a sub-timeslot.
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <osmocom/core/select.h>
+#include <osmocom/isdn/i460_mux.h>
+#include <osmocom/trau/trau_frame.h>
+
+#include "globals.h"
+#include "submux.h"
+#include "read_file.h"
+#include "out_frame.h"
+
+void cmd_activate(int argc, char **argv)
+{
+	int nr, rc;
+	bool dtxd;
+	struct ater_subslot *at;
+	int16_t *init_frame;
+	unsigned init_frame_count;
+
+	if (argc < 3 || argc > 4) {
+usage:		fprintf(stderr, "usage: %s 0-7 initial-frame.dec [dtxd]\n",
+			argv[0]);
+		return;
+	}
+	if (argv[1][0] < '0' || argv[1][0] > '7' || argv[1][1])
+		goto usage;
+	nr = argv[1][0] - '0';
+	if (argv[3]) {
+		if (strcmp(argv[3], "dtxd"))
+			goto usage;
+		dtxd = true;
+	} else
+		dtxd = false;
+
+	at = &subslots[nr];
+	if (at->is_active) {
+		fprintf(stderr, "error: subslot %d is already active\n", nr);
+		return;
+	}
+	rc = read_binary_file(argv[2], &init_frame, &init_frame_count);
+	if (rc < 0)
+		return;		/* error msg already printed */
+	if (init_frame_count != 1) {
+		free(init_frame);
+		fprintf(stderr, "error: %s contains more than one frame\n",
+			argv[2]);
+		return;
+	}
+
+	/* good to proceed now */
+	at->is_active = true;
+	init_trau_ul_frame(nr);
+	at->ul_frame.c_bits[8] = dtxd;
+	trau_frame_from_record(init_frame, &at->ul_frame, &at->frame_has_taf);
+	free(init_frame);
+}
+
+void cmd_deact(int argc, char **argv)
+{
+	int nr;
+	struct ater_subslot *at;
+
+	if (argc != 2) {
+usage:		fprintf(stderr, "usage: %s 0-7\n", argv[0]);
+		return;
+	}
+	if (argv[1][0] < '0' || argv[1][0] > '7' || argv[1][1])
+		goto usage;
+	nr = argv[1][0] - '0';
+	at = &subslots[nr];
+	if (!at->is_active) {
+		fprintf(stderr, "error: subslot %d is not active\n", nr);
+		return;
+	}
+	at->is_active = false;
+	if (at->play_buffer) {
+		free(at->play_buffer);
+		at->play_buffer = NULL;
+	}
+}