2 files changed, 152 insertions, 0 deletions
diff --git a/pkg/ttymididrv/driver.go b/pkg/ttymididrv/driver.go
new file mode 100644
index 0000000..cc7b1fd
--- /dev/null
+++ b/pkg/ttymididrv/driver.go
@@ -0,0 +1,73 @@
+package ttymididrv
+
+import (
+	"sync"
+
+	"gitlab.com/gomidi/midi/mid"
+)
+
+type driver struct {
+	mu     sync.RWMutex
+	outs   []mid.Out
+	opened []mid.Port
+	closed bool
+}
+
+func New(name string, baud int) mid.Driver {
+	d := &driver{}
+	d.outs = []mid.Out{
+		&out{
+			name:   name,
+			baud:   baud,
+			number: 0,
+			driver: d,
+		},
+	}
+
+	return d
+}
+
+func (d *driver) String() string {
+	return "ttymididrv"
+}
+
+func (d *driver) Close() (err error) {
+	d.mu.RLock()
+	if d.closed {
+		d.mu.RUnlock()
+		return mid.ErrClosed
+	}
+	d.mu.RUnlock()
+
+	d.mu.Lock()
+	d.closed = true
+	d.mu.Unlock()
+
+	for _, p := range d.opened {
+		err = p.Close()
+	}
+
+	return
+}
+
+func (d *driver) Ins() ([]mid.In, error) {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+
+	if d.closed {
+		return nil, mid.ErrClosed
+	}
+
+	return nil, nil
+}
+
+func (d *driver) Outs() ([]mid.Out, error) {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+
+	if d.closed {
+		return nil, mid.ErrClosed
+	}
+
+	return d.outs, nil
+}
diff --git a/pkg/ttymididrv/out.go b/pkg/ttymididrv/out.go
new file mode 100644
index 0000000..3e16cff
--- /dev/null
+++ b/pkg/ttymididrv/out.go
@@ -0,0 +1,79 @@
+package ttymididrv
+
+import (
+	"sync"
+
+	"github.com/tarm/serial"
+)
+
+type out struct {
+	mu     sync.RWMutex
+	driver *driver
+	port   *serial.Port
+	name   string
+	baud   int
+	closed bool
+	number int
+}
+
+func (o *out) Open() (err error) {
+	o.mu.RLock()
+	if o.closed || o.port != nil {
+		o.mu.RUnlock()
+		return nil
+	}
+	o.mu.RUnlock()
+
+	o.mu.Lock()
+	defer o.mu.Unlock()
+
+	c := &serial.Config{Name: o.name, Baud: o.baud}
+	o.port, err = serial.OpenPort(c)
+	if err != nil {
+		return err
+	}
+
+	o.driver.mu.Lock()
+	o.driver.opened = append(o.driver.opened, o)
+	o.driver.mu.Unlock()
+
+	return nil
+}
+
+func (o *out) Close() error {
+	o.mu.RLock()
+	if o.closed || o.port == nil {
+		o.mu.RUnlock()
+		return nil
+	}
+	o.mu.RUnlock()
+
+	o.mu.Lock()
+	o.closed = true
+	o.mu.Unlock()
+
+	return o.port.Close()
+}
+
+func (o *out) IsOpen() bool {
+	o.mu.RLock()
+	defer o.mu.RUnlock()
+	return !o.closed && o.port != nil
+}
+
+func (o *out) Number() int {
+	return o.number
+}
+
+func (o *out) String() string {
+	return o.name
+}
+
+func (o *out) Underlying() interface{} {
+	return o.port
+}
+
+func (o *out) Send(b []byte) error {
+	_, err := o.port.Write(b)
+	return err
+}