5 files changed, 178 insertions, 0 deletions
diff --git a/cmd/playsmf/main.go b/cmd/playsmf/main.go
new file mode 100644
index 0000000..7b55ff3
--- /dev/null
+++ b/cmd/playsmf/main.go
@@ -0,0 +1,114 @@
+package main
+
+import (
+	"container/list"
+	"flag"
+	"fmt"
+	"os"
+	"time"
+
+	"gitlab.com/gomidi/midi"
+	"gitlab.com/gomidi/midi/mid"
+	"gitlab.com/gomidi/midi/midimessage"
+	"gitlab.com/gomidi/midi/smf"
+	"go.terinstock.com/midifi/pkg/ttymididrv"
+)
+
+var (
+	drv        mid.Driver
+	midiSerial string
+)
+
+func init() {
+	flag.StringVar(&midiSerial, "com", "", "The serial port of the MIDI synth")
+}
+
+func main() {
+	flag.Parse()
+	drv = ttymididrv.New(midiSerial, 38400)
+	defer drv.Close()
+
+	outs, err := drv.Outs()
+	if err != nil {
+		fmt.Printf("err: %v\n", err)
+		os.Exit(-1)
+	}
+	out := outs[0]
+
+	err = out.Open()
+	if err != nil {
+		fmt.Printf("err: %v\n", err)
+		os.Exit(-1)
+	}
+	defer out.Close()
+
+	if flag.NArg() == 0 {
+		flag.Usage()
+		os.Exit(-1)
+	}
+
+	f, err := os.Open(flag.Arg(0))
+	if err != nil {
+		fmt.Println("unable to load SMF file")
+		os.Exit(-2)
+	}
+	defer f.Close()
+
+	fmt.Printf("file: %s\n", flag.Arg(0))
+
+	mf := mid.NewReader(mid.NoLogger())
+	mf.SMFHeader = func(header smf.Header) {
+		fmt.Printf("file format: %s\n", header.Format.String())
+		fmt.Printf("number of tracks: %d\n", header.NumTracks)
+		fmt.Printf("time format: %s\n", header.TimeFormat.String())
+		fmt.Println("===========")
+	}
+	events := &list.List{}
+	mf.Msg.Each = func(pos *mid.Position, msg midi.Message) {
+		addEvent(events, Event{track: pos.Track, abs: pos.AbsoluteTicks, msg: msg})
+	}
+	mf.ReadSMF(f)
+
+	w := mid.WriteTo(out)
+
+	var lastDur time.Duration
+	for event := events.Front(); event != nil; event = event.Next() {
+		dur := *mf.TimeAt(event.Value.(Event).abs)
+		if lastDur != dur {
+			<-time.After(dur - lastDur)
+			lastDur = dur
+		}
+
+		msg := event.Value.(Event).msg
+		if midimessage.IsLive(msg) {
+			fmt.Printf("%s\n", msg.String())
+			w.Write(msg)
+		}
+	}
+}
+
+type Event struct {
+	track int16
+	abs   uint64
+	msg   midi.Message
+}
+
+func addEvent(l *list.List, evt Event) {
+	if l.Front() == nil {
+		l.PushBack(evt)
+		return
+	}
+
+	for cur := l.Front(); cur != nil; cur = cur.Next() {
+		peek := cur.Next()
+		if peek == nil {
+			l.InsertAfter(evt, cur)
+			return
+		}
+
+		if peek.Value.(Event).abs >= evt.abs {
+			l.InsertAfter(evt, cur)
+			return
+		}
+	}
+}
diff --git a/cmd/playsmf/main_test.go b/cmd/playsmf/main_test.go
new file mode 100644
index 0000000..68ee28f
--- /dev/null
+++ b/cmd/playsmf/main_test.go
@@ -0,0 +1,48 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"testing"
+
+	"github.com/pkg/term/termios"
+	"gotest.tools/golden"
+)
+
+func TestMain(m *testing.M) {
+	switch os.Getenv("GOTESTMODE") {
+	case "main":
+		// run the normal main function
+		main()
+	default:
+		os.Exit(m.Run())
+	}
+}
+
+func TestCLI(t *testing.T) {
+	pty, tty, err := termios.Pty()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer pty.Close()
+
+	cmd := exec.Command(os.Args[0], "-com", tty.Name(), "./testdata/ceottk.mid")
+	cmd.Env = append(os.Environ(), "GOTESTMODE=main")
+
+	output, err := cmd.Output()
+	if err != nil {
+		fmt.Printf("output: %s\n", string(output))
+		t.Fatal(err)
+	}
+
+	tty.Close()
+	b, err := ioutil.ReadAll(pty)
+	if err != nil && err.Error() != "read ptm: input/output error" {
+		t.Errorf("error reading pty: %+v", err)
+	}
+
+	golden.AssertBytes(t, b, "ceottk-serial.golden.bin")
+	golden.Assert(t, string(output), "ceottk-output.golden")
+}
diff --git a/cmd/playsmf/testdata/ceottk-output.golden b/cmd/playsmf/testdata/ceottk-output.golden
new file mode 100644
index 0000000..4cac21b
--- /dev/null
+++ b/cmd/playsmf/testdata/ceottk-output.golden
@@ -0,0 +1,16 @@
+file: ./testdata/ceottk.mid
+file format: SMF1 (multitrack)
+number of tracks: 2
+time format: 480 MetricTicks
+===========
+channel.NoteOn channel 1 key 79 velocity 81
+channel.ProgramChange channel 1 program 19
+channel.NoteOn channel 1 key 81 velocity 81
+channel.NoteOff channel 1 key 79
+channel.NoteOn channel 1 key 77 velocity 81
+channel.NoteOff channel 1 key 81
+channel.NoteOn channel 1 key 65 velocity 81
+channel.NoteOff channel 1 key 77
+channel.NoteOn channel 1 key 72 velocity 81
+channel.NoteOff channel 1 key 65
+channel.NoteOff channel 1 key 72
diff --git a/cmd/playsmf/testdata/ceottk-serial.golden.bin b/cmd/playsmf/testdata/ceottk-serial.golden.bin
new file mode 100644
index 0000000..a505536
--- /dev/null
+++ b/cmd/playsmf/testdata/ceottk-serial.golden.bin
diff --git a/cmd/playsmf/testdata/ceottk.mid b/cmd/playsmf/testdata/ceottk.mid
new file mode 100644
index 0000000..4d0877e
--- /dev/null
+++ b/cmd/playsmf/testdata/ceottk.mid