refactor(tracker): Rewrote the sequencer loop to use simple mutex

oto/oto.go

@@ -0,0 +1,51 @@
+package oto
+
+import (
+	"fmt"
+
+	"github.com/hajimehoshi/oto"
+	"github.com/vsariola/sointu"
+)
+
+type OtoContext oto.Context
+type OtoOutput oto.Player
+
+func (c *OtoContext) Output() sointu.AudioSink {
+	return (*OtoOutput)((*oto.Context)(c).NewPlayer())
+}
+
+const otoBufferSize = 8192
+
+// NewPlayer creates and initializes a new OtoPlayer
+func NewContext() (*OtoContext, error) {
+	context, err := oto.NewContext(44100, 2, 2, otoBufferSize)
+	if err != nil {
+		return nil, fmt.Errorf("cannot create oto context: %w", err)
+	}
+	return (*OtoContext)(context), nil
+}
+
+func (c *OtoContext) Close() error {
+	if err := (*oto.Context)(c).Close(); err != nil {
+		return fmt.Errorf("cannot close oto context: %w", err)
+	}
+	return nil
+}
+
+// Play implements the audio.Player interface for OtoPlayer
+func (o *OtoOutput) WriteAudio(floatBuffer []float32) (err error) {
+	if byteBuffer, err := FloatBufferTo16BitLE(floatBuffer); err != nil {
+		return fmt.Errorf("cannot convert buffer to bytes: %w", err)
+	} else if _, err := (*oto.Player)(o).Write(byteBuffer); err != nil {
+		return fmt.Errorf("cannot write to player: %w", err)
+	}
+	return nil
+}
+
+// Close disposes of resources
+func (o *OtoOutput) Close() error {
+	if err := (*oto.Player)(o).Close(); err != nil {
+		return fmt.Errorf("cannot close oto player: %w", err)
+	}
+	return nil
+}