1 files changed, 108 insertions, 0 deletions
diff --git a/backends/rtpmidi.h b/backends/rtpmidi.h
new file mode 100644
index 0000000..6cab225
--- /dev/null
+++ b/backends/rtpmidi.h
@@ -0,0 +1,108 @@
+#ifndef _WIN32
+#include <sys/socket.h>
+#endif
+#include "midimonster.h"
+
+int init();
+static int rtpmidi_configure(char* option, char* value);
+static int rtpmidi_configure_instance(instance* instance, char* option, char* value);
+static instance* rtpmidi_instance();
+static channel* rtpmidi_channel(instance* instance, char* spec, uint8_t flags);
+static int rtpmidi_set(instance* inst, size_t num, channel** c, channel_value* v);
+static int rtpmidi_handle(size_t num, managed_fd* fds);
+static int rtpmidi_start();
+static int rtpmidi_shutdown();
+
+#define RTPMIDI_DEFAULT_PORTBASE "9001"
+#define RTPMIDI_RECV_BUF 4096
+#define RTPMIDI_MDNS_PORT "5353"
+#define RTPMIDI_HEADER_MAGIC htobe16(0x80E1)
+
+enum /*_rtpmidi_channel_type*/ {
+	none = 0,
+	note = 0x90,
+	cc = 0xB0,
+	pressure = 0xA0,
+	aftertouch = 0xD0,
+	pitchbend = 0xE0
+};
+
+typedef enum /*_rtpmidi_instance_mode*/ {
+	unconfigured = 0,
+	direct,
+	apple
+} rtpmidi_instance_mode;
+
+typedef union {
+	struct {
+		uint8_t pad[5];
+		uint8_t type;
+		uint8_t channel;
+		uint8_t control;
+	} fields;
+	uint64_t label;
+} rtpmidi_channel_ident;
+
+typedef struct /*_rtpmidi_peer*/ {
+	struct sockaddr_storage dest;
+	socklen_t dest_len;
+	uint32_t ssrc;
+} rtpmidi_peer;
+
+typedef struct /*_rtmidi_instance_data*/ {
+	rtpmidi_instance_mode mode;
+
+	int fd;
+	int control_fd;
+
+	size_t peers;
+	rtpmidi_peer* peer;
+	uint32_t ssrc;
+
+	//apple-midi config
+	char* session_name;
+	char* invite_peers;
+	char* invite_accept;
+
+	//direct mode config
+	uint8_t learn_peers;
+} rtpmidi_instance_data;
+
+#pragma pack(push, 1)
+typedef struct /*_apple_session_command*/ {
+	uint16_t res1;
+	uint8_t command[2];
+	uint32_t version;
+	uint32_t token;
+	uint32_t ssrc;
+	//char* name
+} apple_command;
+
+typedef struct /*_apple_session_sync*/ {
+	uint16_t res1;
+	uint8_t command[2];
+	uint32_t ssrc;
+	uint8_t count;
+	uint8_t res2[3];
+	uint64_t timestamp[3];
+} apple_sync;
+
+typedef struct /*_apple_session_feedback*/ {
+	uint16_t res1;
+	uint8_t command[2];
+	uint32_t ssrc;
+	uint32_t sequence;
+} apple_feedback;
+
+typedef struct /*_rtp_midi_header*/ {
+	uint16_t vpxccmpt; //this is really just an amalgamated constant value
+	uint16_t sequence;
+	uint32_t timestamp;
+	uint32_t ssrc;
+} rtpmidi_header;
+
+typedef struct /*_rtp_midi_command*/ {
+	uint8_t flags;
+	uint8_t additional_length;
+} rtpmidi_command;
+#pragma pack(pop)