1 files changed, 12 insertions, 2 deletions
diff --git a/backends/midi.h b/backends/midi.h
index dcee010..e2d6543 100644
--- a/backends/midi.h
+++ b/backends/midi.h
@@ -10,18 +10,28 @@ static int midi_handle(size_t num, managed_fd* fds);
 static int midi_start(size_t n, instance** inst);
 static int midi_shutdown(size_t n, instance** inst);
 
+#define EPN_NRPN 8
+#define EPN_PARAMETER_HI 4
+#define EPN_PARAMETER_LO 2
+#define EPN_VALUE_HI 1
+
 typedef struct /*_midi_instance_data*/ {
 	int port;
 	char* read;
 	char* write;
+
+	uint8_t epn_tx_short;
+	uint16_t epn_control[16];
+	uint16_t epn_value[16];
+	uint8_t epn_status[16];
 } midi_instance_data;
 
 typedef union {
 	struct {
-		uint8_t pad[5];
+		uint8_t pad[4];
 		uint8_t type;
 		uint8_t channel;
-		uint8_t control;
+		uint16_t control;
 	} fields;
 	uint64_t label;
 } midi_channel_ident;