Updates to actually play system MIDI devices.

Author: oubiwann

cmd/midiserver/main.go

@@ -14,7 +14,7 @@ import (
 
 func main() {
 	app.SetupLogging()
-	log.Info("Starting up Go Port example ...")
+	log.Info("Starting up Go midiserver ...")
 	log.Infof("Running version: %s", app.VersionedBuildString())
 	app.SetupRandom()
 	ctx, cancel := app.SignalWithContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)

go.mod

@@ -7,4 +7,5 @@ require (
 	github.com/okeuday/erlang_go/v2 v2.0.2
 	github.com/sirupsen/logrus v1.8.1
 	gitlab.com/gomidi/midi v1.23.7
+	gitlab.com/gomidi/rtmididrv v0.14.0
 )

go.sum

@@ -20,8 +20,11 @@ github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+gitlab.com/gomidi/midi v1.21.0/go.mod h1:3ohtNOhqoSakkuLG/Li1OI6I3J1c2LErnJF5o/VBq1c=
 gitlab.com/gomidi/midi v1.23.7 h1:I6qKoIk9s9dcX+pNf0jC+tziCzJFn82bMpuntRkLeik=
 gitlab.com/gomidi/midi v1.23.7/go.mod h1:3ohtNOhqoSakkuLG/Li1OI6I3J1c2LErnJF5o/VBq1c=
+gitlab.com/gomidi/rtmididrv v0.14.0 h1:IBkDsqXs1RuFoRWgQbyYEpwe0hoXZ17FLTZaJuyXWx0=
+gitlab.com/gomidi/rtmididrv v0.14.0/go.mod h1:p/6IL1LGgj7utcv3wXudsDWiD9spgAdn0O8LDsGIPG0=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=

pkg/midiserver/rw.go

@@ -5,6 +5,8 @@ import (
 	"io"
 	"time"
 
+	log "github.com/sirupsen/logrus"
+	driver "gitlab.com/gomidi/rtmididrv"
 	"gitlab.com/gomidi/midi/reader"
 	"gitlab.com/gomidi/midi/writer"
 )
@@ -23,6 +25,44 @@ func Example() {
 
 	var p printer
 
+	drv, err := driver.New()
+	if err != nil {
+		log.Panic(err)
+	}
+	defer drv.Close()
+
+	ins, err := drv.Ins()
+	if err != nil {
+		log.Panic(err)
+	}
+
+	outs, err := drv.Outs()
+	if err != nil {
+		log.Panic(err)
+	}
+
+	log.Debug("MIDI IN Ports")
+	for _, port := range ins {
+		log.Debugf("[%v] %s\n", port.Number(), port.String())
+	}
+
+	log.Debug("MIDI OUT Ports")
+	for _, port := range outs {
+		log.Debugf("[%v] %s\n", port.Number(), port.String())
+	}
+
+	in, out := ins[0], outs[0]
+
+	err = in.Open()
+	if err != nil {
+		log.Panic(err)
+	}
+
+	err = out.Open()
+	if err != nil {
+		log.Panic(err)
+	}
+
 	// to disable logging, pass mid.NoLogger() as option
 	rd := reader.New(reader.NoLogger(),
 		// set the callbacks for the messages you are interested in
@@ -35,11 +75,15 @@ func Example() {
 	piperd, pipewr := io.Pipe()
 
 	go func() {
-		wr := writer.New(pipewr)
-		wr.SetChannel(1) // sets the channel for the next messages
-		writer.NoteOn(wr, 120, 100)
+		// wr := writer.New(pipewr)
+		wr := writer.New(out)
+		wr.SetChannel(0) // sets the channel for the next messages
+		err := writer.NoteOn(wr, 60, 100)
+		if err != nil {
+			log.Panic(err)
+		}
 		time.Sleep(5 * time.Second)
-		writer.NoteOff(wr, 120) // let the note ring for 5 sec
+		writer.NoteOff(wr, 60) // let the note ring for 5 sec
 		pipewr.Close()          // finishes the writing
 	}()
 

pkg/port/port.go

@@ -23,6 +23,7 @@ func ProcessMessages(ctx context.Context, fn CommandProcessor) {
 	log.Info("Processing messages sent to Go language server ...")
 	go func() {
 		for {
+			// XXX Let's make these switchable with a CLI flag
 			cmd := ProcessExecMessage()
 			// cmd := ProcessPortMessage()
 			if cmd == "continue" {