#ifndef _WIN32 #include #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 int rtpmidi_instance(instance* inst); static channel* rtpmidi_channel(instance* instance, char* spec, uint8_t flags); static uint32_t rtpmidi_interval(); 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_DEFAULT4_HOST "0.0.0.0" #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 #define RTPMIDI_MDNS_DOMAIN "_apple-midi._udp.local." #define RTPMIDI_DNSSD_DOMAIN "_services._dns-sd._udp.local." #define RTPMIDI_ANNOUNCE_INTERVAL (60 * 1000) #define DNS_POINTER(a) (((a) & 0xC0) == 0xC0) #define DNS_LABEL_LENGTH(a) ((a) & 0x3F) #define DNS_OPCODE(a) (((a) & 0x78) >> 3) #define DNS_RESPONSE(a) ((a) & 0x80) enum /*_rtpmidi_channel_type*/ { none = 0, note = 0x90, pressure = 0xA0, cc = 0xB0, program = 0xC0, 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 (learned peers are marked inactive on session shutdown) uint8_t connected; //currently in active session ssize_t invite; //invite-list index for apple-mode learned peers (used to track ipv6/ipv4 overlapping invitations) } rtpmidi_peer; typedef struct /*_rtmidi_instance_data*/ { rtpmidi_instance_mode mode; int fd; int control_fd; uint16_t control_port; /*convenience member set by rtpmidi_bind_instance*/ size_t peers; rtpmidi_peer* peer; uint32_t ssrc; uint16_t sequence; //apple-midi config char* accept; uint64_t last_announce; //direct mode config uint8_t learn_peers; } rtpmidi_instance_data; typedef struct /*rtpmidi_invited_peer*/ { instance* inst; size_t invites; char** name; } rtpmidi_invite; typedef struct /*_rtpmidi_addr*/ { int family; //this is actually a fair bit too big, but whatever uint8_t addr[sizeof(struct sockaddr_storage)]; } rtpmidi_addr; typedef enum { apple_invite = 0x494E, //IN apple_accept = 0x4F4B, //OK apple_reject = 0x4E4F, //NO apple_leave = 0x4259, //BY apple_sync = 0x434B, //CK apple_feedback = 0x5253 //RS } applemidi_command; typedef struct /*_dns_name*/ { size_t alloc; char* name; size_t length; } dns_name; #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; typedef struct /*_dns_header*/ { uint16_t id; uint8_t flags[2]; uint16_t questions; uint16_t answers; uint16_t servers; uint16_t additional; } dns_header; typedef struct /*_dns_question*/ { uint16_t qtype; uint16_t qclass; } dns_question; typedef struct /*_dns_rr*/ { uint16_t rtype; uint16_t rclass; uint32_t ttl; uint16_t data; } dns_rr; typedef struct /*_dns_rr_srv*/ { uint16_t priority; uint16_t weight; uint16_t port; } dns_rr_srv; #pragma pack(pop)