Implement JACK backend

1 files changed, 76 insertions, 0 deletions

diff --git a/backends/jack.h b/backends/jack.h
new file mode 100644
index 0000000..dd59cd2
--- /dev/null
+++ b/backends/jack.h
@@ -0,0 +1,76 @@
+#include "midimonster.h"
+#include <jack/jack.h>
+#include <pthread.h>
+
+int init();
+static int mmjack_configure(char* option, char* value);
+static int mmjack_configure_instance(instance* inst, char* option, char* value);
+static instance* mmjack_instance();
+static channel* mmjack_channel(instance* inst, char* spec);
+static int mmjack_set(instance* inst, size_t num, channel** c, channel_value* v);
+static int mmjack_handle(size_t num, managed_fd* fds);
+static int mmjack_start();
+static int mmjack_shutdown();
+
+#define JACK_DEFAULT_CLIENT_NAME "MIDIMonster"
+#define JACK_DEFAULT_SERVER_NAME "default"
+#define JACK_MIDIQUEUE_CHUNK 10
+
+enum /*mmjack_midi_channel_type*/ {
+	midi_none = 0,
+	midi_note = 0x90,
+	midi_cc = 0xB0,
+	midi_pressure = 0xA0,
+	midi_aftertouch = 0xD0,
+	midi_pitchbend = 0xE0
+};
+
+typedef union {
+	struct {
+		uint32_t port;
+		uint8_t pad;
+		uint8_t sub_type;
+		uint8_t sub_channel;
+		uint8_t sub_control;
+	} fields;
+	uint64_t label;
+} mmjack_channel_ident;
+
+typedef enum /*_mmjack_port_type*/ {
+	port_none = 0,
+	port_midi,
+	port_osc,
+	port_cv
+} mmjack_port_type;
+
+typedef struct /*_mmjack_midiqueue_entry*/ {
+	mmjack_channel_ident ident;
+	uint16_t raw;
+} mmjack_midiqueue;
+
+typedef struct /*_mmjack_port_data*/ {
+	char* name;
+	mmjack_port_type type;
+	uint8_t input;
+	jack_port_t* port;
+
+	double max;
+	double min;
+	uint8_t mark;
+	double last;
+	size_t queue_len;
+	size_t queue_alloc;
+	mmjack_midiqueue* queue;
+
+	pthread_mutex_t lock;
+} mmjack_port;
+
+typedef struct /*_jack_instance_data*/ {
+	char* server_name;
+	char* client_name;
+	int fd;
+
+	jack_client_t* client;
+	size_t ports;
+	mmjack_port* port;
+} mmjack_instance_data;