From dfaf0bbab9e6d916fc5c79e3163446522df465f4 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sat, 14 Apr 2012 20:55:21 +0200
Subject: [PATCH] Added experimental utility for controlling jackd in the
 Ursarium

---
 Makefile | 10 ++++++
 jt.c     | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 107 insertions(+)
 create mode 100644 Makefile
 create mode 100644 jt.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..110823b
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,10 @@
+JACK_CFLAGS:=$(shell pkg-config --cflags jack)
+JACK_LIBS:=$(shell pkg-config --libs jack)
+
+CFLAGS=-O2 -Wall -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -Wundef -Wredundant-decls -std=gnu99 $(JACK_CFLAGS)
+LDLIBS=$(JACK_LIBS)
+
+all: jt
+
+clean:
+	rm -f `find . -name "*~" -or -name "*.[oa]" -or -name "\#*\#" -or -name TAGS -or -name core -or -name .depend -or -name .#*`
diff --git a/jt.c b/jt.c
new file mode 100644
index 0000000..3fa5558
--- /dev/null
+++ b/jt.c
@@ -0,0 +1,97 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <jack/jack.h>
+
+typedef jack_default_audio_sample_t sample_t;
+
+static jack_client_t *jc;
+static jack_port_t *inport[2], *outport[4];
+
+static int process_callback(jack_nframes_t nframes, void *arg __attribute__((unused)))
+{
+	for (int ch=0; ch<2; ch++) {
+		sample_t *in = jack_port_get_buffer(inport[ch], nframes);
+		sample_t *out = jack_port_get_buffer(outport[ch], nframes);
+		sample_t *out2 = jack_port_get_buffer(outport[2+ch], nframes);
+		for (jack_nframes_t i=0; i<nframes; i++) {
+			out[i] = in[i];
+			out2[i] = in[i];
+		}
+	}
+	return 0;
+}
+
+static void port_callback(jack_port_id_t id, int reg, void *arg __attribute__((unused)))
+{
+	jack_port_t *p = jack_port_by_id(jc, id);
+	if (!p) {
+		puts("port_callback: lookup failed");
+		return;
+	}
+	const char *name = jack_port_name(p);
+	printf("%s port %s\n", (reg ? "Registered" : "Unregistered"), name);
+
+	const char *ss = strstr(name, ":from_slave_");
+	if (reg && ss) {
+		char *to = (ss[12] == '1' ? "brum:in1" : "brum:in2");
+		printf("\t... connecting to %s\n", to);
+		if (jack_connect(jc, name, to))
+			puts("jack_connect failed");
+	}
+}
+
+int main(void)
+{
+	jc = jack_client_open("brum", JackNoStartServer, NULL);
+	if (!jc) {
+		puts("jack_client_open failed");
+		return 1;
+	}
+
+	for (int i=0; i<2; i++) {
+		char name[16];
+		sprintf(name, "in%d", i+1);
+		inport[i] = jack_port_register(jc, name, JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0);
+		if (!inport[i]) {
+			puts("jack_port_register failed");
+			return 1;
+		}
+	}
+
+	for (int i=0; i<4; i++) {
+		char name[16];
+		sprintf(name, "out%d", i+1);
+		outport[i] = jack_port_register(jc, name, JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
+		if (!outport[i]) {
+			puts("jack_port_register failed");
+			return 1;
+		}
+	}
+
+	jack_set_process_callback(jc, process_callback, NULL);
+	jack_set_port_registration_callback(jc, port_callback, NULL);
+
+	if (jack_activate(jc)) {
+		puts("jack_activate failed");
+		return 1;
+	}
+
+	puts("Connecting ports...");
+	for (int i=1; i<=4; i++) {
+		char a[32], b[32];
+		sprintf(a, "brum:out%d", i);
+		sprintf(b, "system:playback_%d", i);
+		if (jack_connect(jc, a, b))
+			printf("Failed to connect %s -> %s\n", a, b);
+	}
+
+	puts("Running...");
+	char xxx[16];
+	read(0, xxx, sizeof(xxx));
+
+	puts("exiting");
+	jack_client_close(jc);
+	return 0;
+}
-- 
2.39.2