init

ogg.go

@@ -0,0 +1,76 @@
+package ahsai
+
+import (
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/faiface/beep"
+	"github.com/faiface/beep/speaker"
+	"github.com/faiface/beep/vorbis"
+	"github.com/faiface/beep/wav"
+)
+
+func SaveOggToWav(u, path string) error {
+	resp, err := http.Get(u)
+	if err != nil {
+		return err
+	}
+	s, format, err := vorbis.Decode(resp.Body)
+	if err != nil {
+		resp.Body.Close()
+		return err
+	}
+	defer s.Close()
+	f, err := os.Create(path)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	tmp := make([][2]float64, 1024)
+	_, _ = s.Stream(tmp)
+	sum := (tmp[0][0] + tmp[0][1]) / 2
+	for sum > 1e-32 || sum < -1e-32 {
+		_, _ = s.Stream(tmp)
+		sum = (tmp[0][0] + tmp[0][1]) / 2
+		for j := 1; j < 1024; j++ {
+			sum += (tmp[j][0] + tmp[j][1]) / 2
+			sum /= 2
+		}
+	}
+	return wav.Encode(f, s, format)
+}
+
+func PlayOgg(u string) error {
+	resp, err := http.Get(u)
+	if err != nil {
+		return err
+	}
+	s, format, err := vorbis.Decode(resp.Body)
+	if err != nil {
+		resp.Body.Close()
+		return err
+	}
+	defer s.Close()
+	tmp := make([][2]float64, 1024)
+	_, _ = s.Stream(tmp)
+	sum := (tmp[0][0] + tmp[0][1]) / 2
+	for sum > 1e-32 || sum < -1e-32 {
+		_, _ = s.Stream(tmp)
+		sum = (tmp[0][0] + tmp[0][1]) / 2
+		for j := 1; j < 1024; j++ {
+			sum += (tmp[j][0] + tmp[j][1]) / 2
+			sum /= 2
+		}
+	}
+	err = speaker.Init(format.SampleRate, format.SampleRate.N(time.Second/32))
+	if err != nil {
+		return err
+	}
+	done := make(chan struct{})
+	speaker.Play(beep.Seq(s, beep.Callback(func() {
+		done <- struct{}{}
+	})))
+	<-done
+	return nil
+}