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authorcbdev <cb@cbcdn.com>2018-03-25 23:17:15 +0200
committercbdev <cb@cbcdn.com>2018-03-25 23:17:15 +0200
commitcf889dd8bd983182534457b6778892ef0634e592 (patch)
treec48ae905f6f825b8935b8e64326ff5e772132726 /backends
parent52cb34c88129145597984913b86321a940fc520a (diff)
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Rough rtpmidi backend skeleton
Diffstat (limited to 'backends')
-rw-r--r--backends/Makefile2
-rw-r--r--backends/rtpmidi.c130
-rw-r--r--backends/rtpmidi.h94
3 files changed, 225 insertions, 1 deletions
diff --git a/backends/Makefile b/backends/Makefile
index 446ad70..771e97e 100644
--- a/backends/Makefile
+++ b/backends/Makefile
@@ -1,6 +1,6 @@
.PHONY: all clean
LINUX_BACKENDS = midi.so evdev.so
-BACKENDS = artnet.so osc.so loopback.so sacn.so
+BACKENDS = artnet.so osc.so loopback.so sacn.so rtpmidi.so
SYSTEM := $(shell uname -s)
diff --git a/backends/rtpmidi.c b/backends/rtpmidi.c
new file mode 100644
index 0000000..f77f93b
--- /dev/null
+++ b/backends/rtpmidi.c
@@ -0,0 +1,130 @@
+#include <string.h>
+#include <unistd.h>
+
+#include "rtpmidi.h"
+
+#define BACKEND_NAME "rtpmidi"
+
+/** rtpMIDI backend w/ AppleMIDI support
+ *
+ * Global configuration
+ * bind = 0.0.0.0
+ * apple-bind = 0.0.0.1
+ * mdns-bind = 0.0.0.0
+ * mdns-name = mdns-name
+ *
+ * Instance configuration
+ * interface = 0
+ * (opt) ssrc = X
+ *
+ * apple-session = session-name
+ * apple-invite = invite-peer
+ * apple-allow = *
+ * or
+ * connect =
+ * reply-any = 1
+ */
+
+static struct /*_rtpmidi_global*/ {
+ int mdns_fd;
+ char* mdns_name;
+ size_t nfds;
+ rtpmidi_fd* fds;
+} cfg = {
+ .mdns_fd = -1,
+ .mdns_name = NULL,
+ .nfds = 0,
+ .fds = NULL
+};
+
+int init(){
+ backend rtpmidi = {
+ .name = BACKEND_NAME,
+ .conf = rtpmidi_configure,
+ .create = rtpmidi_instance,
+ .conf_instance = rtpmidi_configure_instance,
+ .channel = rtpmidi_channel,
+ .handle = rtpmidi_set,
+ .process = rtpmidi_handle,
+ .start = rtpmidi_start,
+ .shutdown = rtpmidi_shutdown
+ };
+
+ if(mm_backend_register(rtpmidi)){
+ fprintf(stderr, "Failed to register rtpMIDI backend\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+static int rtpmidi_configure(char* option, char* value){
+ if(!strcmp(option, "mdns-name")){
+ if(cfg.mdns_name){
+ free(cfg.mdns_name);
+ }
+
+ cfg.mdns_name = strdup(value);
+ if(!cfg.mdns_name){
+ fprintf(stderr, "Failed to allocate memory\n");
+ return 1;
+ }
+ //TODO this should create the mdns broadcaster and responder socket
+ return 0;
+ }
+ else if(!strcmp(option, "bind")){
+ //TODO open listening control and data fds
+ }
+
+ fprintf(stderr, "Unknown rtpMIDI backend option %s\n", option);
+ return 1;
+}
+
+static int rtpmidi_configure_instance(instance* inst, char* option, char* value){
+ //TODO
+ return 1;
+}
+
+static instance* rtpmidi_instance(){
+ //TODO
+ return NULL;
+}
+
+static channel* rtpmidi_channel(instance* inst, char* spec){
+ //TODO
+ return NULL;
+}
+
+static int rtpmidi_set(instance* inst, size_t num, channel** c, channel_value* v){
+ //TODO
+ return 1;
+}
+
+static int rtpmidi_handle(size_t num, managed_fd* fds){
+ //TODO
+ return 1;
+}
+
+static int rtpmidi_start(){
+ //TODO
+ return 1;
+}
+
+static int rtpmidi_shutdown(){
+ size_t u;
+
+ free(cfg.mdns_name);
+ if(cfg.mdns_fd >= 0){
+ close(cfg.mdns_fd);
+ }
+
+ for(u = 0; u < cfg.nfds; u++){
+ if(cfg.fds[u].data >= 0){
+ close(cfg.fds[u].data);
+ }
+ if(cfg.fds[u].control >= 0){
+ close(cfg.fds[u].control);
+ }
+ }
+ return 0;
+}
diff --git a/backends/rtpmidi.h b/backends/rtpmidi.h
new file mode 100644
index 0000000..f14357f
--- /dev/null
+++ b/backends/rtpmidi.h
@@ -0,0 +1,94 @@
+#include <sys/socket.h>
+#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);
+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_COMMAND_LEN
+#define RTPMIDI_COMMAND_DATA_OFFSET
+#define RTPMIDI_HAS_JOURNAL
+#define RTPMIDI_IS_PHANTOM
+
+typedef enum /*_rtpmidi_peer_mode*/ {
+ peer_learned,
+ peer_invited,
+ peer_invited_by,
+ peer_sync,
+ peer_connect
+} rtpmidi_peer_mode;
+
+typedef struct /*_rtpmidi_peer*/ {
+ rtpmidi_peer_mode mode;
+ struct sockaddr_storage dest;
+ socklen_t dest_len;
+ uint32_t ssrc;
+} rtpmidi_peer;
+
+typedef struct /*_rtpmidi_fd*/ {
+ int data;
+ int control;
+} rtpmidi_fd;
+
+typedef struct /*_rtmidi_instance_data*/ {
+ size_t fd_index;
+ size_t npeers;
+ rtpmidi_peer* peers;
+ uint32_t ssrc;
+
+ //apple-midi config
+ char* session_name;
+ char* invite_peers;
+ char* invite_accept;
+
+ //generic 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)