1 files changed, 131 insertions, 0 deletions
diff --git a/backends/rtpmidi.h b/backends/rtpmidi.h
new file mode 100644
index 0000000..db6237b
--- /dev/null
+++ b/backends/rtpmidi.h
@@ -0,0 +1,131 @@
+#ifndef _WIN32
+#include <sys/socket.h>
+#endif
+#include "midimonster.h"
+
+MM_PLUGIN_API 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(size_t n, instance** inst);
+static int rtpmidi_shutdown(size_t n, instance** inst);
+
+#define RTPMIDI_PACKET_BUFFER 8192
+#define RTPMIDI_DEFAULT_HOST "::"
+#define RTPMIDI_MDNS_PORT "5353"
+#define RTPMIDI_HEADER_MAGIC 0x80
+#define RTPMIDI_HEADER_TYPE 0x61
+#define RTPMIDI_GET_TYPE(a) ((a) & 0x7F)
+#define RTPMIDI_DEFAULT_NAME "MIDIMonster"
+#define RTPMIDI_SERVICE_INTERVAL 1000
+
+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;
+	uint8_t active; //marked for reuse
+	uint8_t learned; //learned / configured peer
+	uint8_t connected; //currently in active session
+} 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;
+	uint16_t sequence;
+
+	//apple-midi config
+	char* session_name; /* initiator only */
+	char* accept; /* participant only */
+
+	//direct mode config
+	uint8_t learn_peers;
+} rtpmidi_instance_data;
+
+typedef struct /*rtpmidi_announced_instance*/ {
+	instance* inst;
+	size_t invites;
+	char** invite;
+} rtpmidi_announce;
+
+enum applemidi_command {
+	apple_invite = 0x494E, //IN
+	apple_accept = 0x4F4B, //OK
+	apple_reject = 0x4E4F, //NO
+	apple_leave = 0x4259, //BY
+	apple_sync = 0x434B, //CK
+	apple_feedback = 0x5253 //RS
+};
+
+#pragma pack(push, 1)
+typedef struct /*_apple_session_command*/ {
+	uint16_t res1;
+	uint16_t command;
+	uint32_t version;
+	uint32_t token;
+	uint32_t ssrc;
+	//char* name
+} apple_command;
+
+typedef struct /*_apple_session_sync*/ {
+	uint16_t res1;
+	uint16_t command;
+	uint32_t ssrc;
+	uint8_t count;
+	uint8_t res2[3];
+	uint64_t timestamp[3];
+} apple_sync_frame;
+
+typedef struct /*_apple_session_feedback*/ {
+	uint16_t res1;
+	uint8_t command[2];
+	uint32_t ssrc;
+	uint32_t sequence;
+} apple_journal_feedback;
+
+typedef struct /*_rtp_midi_header*/ {
+	uint8_t vpxcc;
+	uint8_t mpt;
+	uint16_t sequence;
+	uint32_t timestamp;
+	uint32_t ssrc;
+} rtpmidi_header;
+
+typedef struct /*_rtp_midi_command*/ {
+	uint8_t flags;
+	uint8_t length;
+} rtpmidi_command_header;
+#pragma pack(pop)