基本逻辑完成

pkg/audio/play.go

@@ -0,0 +1,80 @@
+package audio
+
+import (
+	"context"
+	"github.com/gopxl/beep/v2"
+	"github.com/gopxl/beep/v2/mp3"
+	"github.com/gopxl/beep/v2/speaker"
+	"github.com/gopxl/beep/v2/wav"
+	"io"
+	"log"
+	"time"
+)
+
+var DefaultSampleRate = beep.SampleRate(44100)
+
+func init() {
+	err := speaker.Init(DefaultSampleRate, DefaultSampleRate.N(time.Second/10))
+	if err != nil {
+		panic("扬声器初始化异常: " + err.Error())
+	}
+	log.Println("扬声器初始化完成")
+}
+
+func PlayWav(c context.Context, r io.Reader) {
+	streamer, format, err := wav.Decode(r)
+	if err != nil {
+		return
+	}
+	defer streamer.Close()
+
+	s := beep.Resample(4, format.SampleRate, DefaultSampleRate, streamer)
+
+	ctrl := &beep.Ctrl{Streamer: s}
+	done := make(chan struct{})
+	speaker.Play(beep.Seq(ctrl, beep.Callback(func() {
+		close(done)
+	})))
+
+	for {
+		select {
+		case <-done:
+			return
+		case <-c.Done():
+			{
+				speaker.Lock()
+				ctrl.Streamer = nil
+				speaker.Unlock()
+			}
+		}
+	}
+}
+
+func PlayMP3(c context.Context, r io.ReadCloser) {
+	streamer, format, err := mp3.Decode(r)
+	if err != nil {
+		return
+	}
+	defer streamer.Close()
+
+	s := beep.Resample(4, format.SampleRate, DefaultSampleRate, streamer)
+
+	ctrl := &beep.Ctrl{Streamer: s}
+	done := make(chan struct{})
+	speaker.Play(beep.Seq(ctrl, beep.Callback(func() {
+		close(done)
+	})))
+
+	for {
+		select {
+		case <-done:
+			return
+		case <-c.Done():
+			{
+				speaker.Lock()
+				ctrl.Streamer = nil
+				speaker.Unlock()
+			}
+		}
+	}
+}