start on midicontroller thing

src/Makefile

@@ -46,3 +46,6 @@ bigscreen:	bigscreen.c
 
 tcp2rtsp:	tcp2rtsp.c
 	gcc -g tcp2rtsp.c -o tcp2rtsp  `pkg-config --cflags --libs  gstreamer-1.0 gstreamer-pbutils-1.0 gstreamer-video-1.0 gstreamer-rtsp-server-1.0` $(CFLAGS)  
+
+midicontrol:	midicontrol.c
+	gcc -g midicontrol.c -o midicontrol `pkg-config --cflags --libs alsa` $(CFLAGS) 

src/midicontrol.c

+#include <alsa/asoundlib.h>
+
+static snd_seq_t *seq_handle;
+static int in_port;
+
+#define CHK(stmt, msg) if((stmt) < 0) {puts("ERROR: "#msg); exit(1);}
+void midi_open(void)
+{
+    CHK(snd_seq_open(&seq_handle, "default", SND_SEQ_OPEN_INPUT, 0),
+            "Could not open sequencer");
+
+    CHK(snd_seq_set_client_name(seq_handle, "Midi Listener"),
+            "Could not set client name");
+    CHK(in_port = snd_seq_create_simple_port(seq_handle, "listen:in",
+                SND_SEQ_PORT_CAP_WRITE|SND_SEQ_PORT_CAP_SUBS_WRITE,
+                SND_SEQ_PORT_TYPE_APPLICATION),
+            "Could not open port");
+}
+
+snd_seq_event_t *midi_read(void)
+{
+    snd_seq_event_t *ev = NULL;
+    snd_seq_event_input(seq_handle, &ev);
+    return ev;
+}
+
+void midi_process(const snd_seq_event_t *ev)
+{
+    if((ev->type == SND_SEQ_EVENT_NOTEON)
+            ||(ev->type == SND_SEQ_EVENT_NOTEOFF)) {
+        const char *type = (ev->type==SND_SEQ_EVENT_NOTEON) ? "on " : "off";
+        printf("[%d] Note %s: %2x vel(%2x)\n", ev->time.tick, type,
+                                               ev->data.note.note,
+                                               ev->data.note.velocity);
+    }
+    else if(ev->type == SND_SEQ_EVENT_CONTROLLER)
+        printf("[%d] Control:  %2x val(%2x)\n", ev->time.tick,
+                                                ev->data.control.param,
+                                                ev->data.control.value);
+    else
+        printf("[%d] Unknown:  Unhandled Event Received\n", ev->time.tick);
+}
+
+int main()
+{
+    midi_open();
+    while(1)
+        midi_process(midi_read());
+    return -1;
+}
+