# HG changeset patch
# User Mychaela Falconia <falcon@freecalypso.org>
# Date 1726189423 0
# Node ID 3cc26391d24dabee5d5a70331b9e9bdaf202a478
# Parent  13fffc41f989a08dea35ec9dc4e28112db0acb8f
ater8: add support for data mode

diff -r 13fffc41f989 -r 3cc26391d24d ater8/activate.c
--- a/ater8/activate.c	Thu Sep 12 23:37:47 2024 +0000
+++ b/ater8/activate.c	Fri Sep 13 01:03:43 2024 +0000
@@ -58,12 +58,37 @@
 
 	/* good to proceed now */
 	at->is_active = true;
+	at->is_data = false;
 	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_activate_csd(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 already active\n", nr);
+		return;
+	}
+
+	/* good to proceed now */
+	at->is_active = true;
+	at->is_data = true;
+}
+
 void cmd_deact(int argc, char **argv)
 {
 	int nr;
diff -r 13fffc41f989 -r 3cc26391d24d ater8/globals.h
--- a/ater8/globals.h	Thu Sep 12 23:37:47 2024 +0000
+++ b/ater8/globals.h	Fri Sep 13 01:03:43 2024 +0000
@@ -17,6 +17,7 @@
 void cmd_record_stop(int argc, char **argv);
 void cmd_print_rx(int argc, char **argv);
 void cmd_activate(int argc, char **argv);
+void cmd_activate_csd(int argc, char **argv);
 void cmd_deact(int argc, char **argv);
 void cmd_play_file(int argc, char **argv);
 void cmd_play_stop(int argc, char **argv);
diff -r 13fffc41f989 -r 3cc26391d24d ater8/play_cmd.c
--- a/ater8/play_cmd.c	Thu Sep 12 23:37:47 2024 +0000
+++ b/ater8/play_cmd.c	Fri Sep 13 01:03:43 2024 +0000
@@ -31,6 +31,10 @@
 		fprintf(stderr, "error: subslot %d is not active\n", nr);
 		return;
 	}
+	if (at->is_data) {
+		fprintf(stderr, "error: subslot %d is in data mode\n", nr);
+		return;
+	}
 	if (at->play_buffer) {
 		fprintf(stderr, "error: file play already in progress\n");
 		return;
diff -r 13fffc41f989 -r 3cc26391d24d ater8/submux.h
--- a/ater8/submux.h	Thu Sep 12 23:37:47 2024 +0000
+++ b/ater8/submux.h	Fri Sep 13 01:03:43 2024 +0000
@@ -19,6 +19,7 @@
 	struct osmo_i460_subchan *schan;
 	int nr;
 	bool is_active;
+	bool is_data;
 	bool frame_has_taf;
 	struct osmo_trau_frame ul_frame;
 	unsigned mfrm_count;
diff -r 13fffc41f989 -r 3cc26391d24d ater8/tx_func.c
--- a/ater8/tx_func.c	Thu Sep 12 23:37:47 2024 +0000
+++ b/ater8/tx_func.c	Fri Sep 13 01:03:43 2024 +0000
@@ -19,6 +19,33 @@
 #include "submux.h"
 #include "out_frame.h"
 
+/*
+ * The following hard-coded frame is based on TS 48.061 section 5.2.2.
+ * 1-based octet numbers in the comments are as in the spec.
+ */
+static const ubit_t idle_data_frame[160] = {
+	0, 0, 0, 0, 0, 0, 0, 0,		/* octet 1 */
+	1, 0, 0, 1, 1, 1, 1, 1,		/* octet 2 */
+	0, 1, 1, 1, 1, 1, 1, 1,		/* octet 3 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 4 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 5 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 6 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 7 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 8 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 9 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 10 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 11 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 12 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 13 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 14 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 15 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 16 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 17 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 18 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 19 */
+	1, 1, 1, 1, 1, 1, 1, 1,		/* octet 20 */
+};
+
 void init_trau_ul_frame(int nr)
 {
 	struct ater_subslot *at = &subslots[nr];
@@ -65,6 +92,19 @@
 		return 1;
 }
 
+static void send_idle_data(int nr)
+{
+	struct ater_subslot *at = &subslots[nr];
+	struct msgb *msg;
+
+	msg = msgb_alloc_c(g_ctx, 160, "TRAU-UL-frame");
+	if (!msg)
+		return;
+	memcpy(msg->tail, idle_data_frame, 160);
+	msgb_put(msg, 160);
+	osmo_i460_mux_enqueue(at->schan, msg);
+}
+
 static void tx_service_subslot(int nr)
 {
 	struct ater_subslot *at = &subslots[nr];
@@ -75,6 +115,10 @@
 
 	if (!at->is_active)
 		return;
+	if (at->is_data) {
+		send_idle_data(nr);
+		return;
+	}
 	if (at->play_buffer)
 		handle_play(at);
 	at->mfrm_count++;
diff -r 13fffc41f989 -r 3cc26391d24d ater8/user_cmd.c
--- a/ater8/user_cmd.c	Thu Sep 12 23:37:47 2024 +0000
+++ b/ater8/user_cmd.c	Fri Sep 13 01:03:43 2024 +0000
@@ -18,6 +18,7 @@
 	void	(*func)(int argc, char **argv);
 } cmdtab[] = {
 	{"activ", cmd_activate},
+	{"activ-d", cmd_activate_csd},
 	{"deact", cmd_deact},
 	{"play", cmd_play_file},
 	{"play-stop", cmd_play_stop},