starting audio player

backend/player/player.go

@@ -0,0 +1,58 @@
+package player
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/gopxl/beep/mp3"
+	"github.com/gopxl/beep/speaker"
+)
+
+type Player struct {
+	ctx   context.Context
+	state PlayerState
+}
+
+type PlayerState int
+
+const (
+	Playing PlayerState = iota
+	Paused
+	Stopped
+)
+
+func NewPlayer() *Player {
+	return &Player{}
+}
+
+func (p *Player) Init(ctx context.Context) {
+	p.ctx = ctx
+	p.state = Stopped
+}
+
+func (p *Player) ChangeState(desiredState PlayerState) error {
+	return nil
+}
+
+func (p *Player) Play() error {
+	f, err := os.Open("test_data/music_library_test/03 anything.mp3")
+	if err != nil {
+		return fmt.Errorf("Failed to open file %w", err)
+	}
+
+	streamer, format, err := mp3.Decode(f)
+	if err != nil {
+		return fmt.Errorf("Failed to decode mp3 %w", err)
+	}
+	defer streamer.Close()
+
+	err = speaker.Init(format.SampleRate, format.SampleRate.N(time.Second/10))
+	if err != nil {
+		return fmt.Errorf("Failed to initialize speaker %w", err)
+	}
+	speaker.Play(streamer)
+	select {}
+	return nil
+}