add audio support, trying to manage MSD device

http/hw/stream/audio.go

@@ -1,33 +1,47 @@
 package stream
 
 import (
-	"github.com/gin-gonic/gin"
 	"io"
 	"net/http"
 	"os/exec"
+
+	"github.com/gin-gonic/gin"
+	log "github.com/sirupsen/logrus"
 )
 
+type Audio struct {
+}
+
 func AudioHandler(c *gin.Context) {
 	cmd := exec.Command("ffmpeg",
 		"-f", "alsa",
 		"-i", "hw:0,0",
 		"-acodec", "aac",
 		"-f", "mp4", "-")
+
+	//c := "arecord -D hw:0,0 -f cd -r 44100 -c 2 | /app/ffmpeg -re -f wav -i pipe:0 -c:a aac -b:a 128k -ar 44100 -ac 2 -f rtp rtp://127.0.0.1:5006?pkt_size=1200"
+	//cmd := exec.Command("sh", "-c", c)
 	// ffmpeg -f alsa -i hw:0,0 -acodec aac -f mp4 -
 	stdout, err := cmd.StdoutPipe()
 	if err != nil {
 		c.String(http.StatusInternalServerError, "Failed to capture audio: %v", err)
+		log.Errorf("Failed to capture audio: %v", err)
 		return
 	}
 	if err := cmd.Start(); err != nil {
 		c.String(http.StatusInternalServerError, "Failed to start ffmpeg: %v", err)
+		log.Errorf("Failed to start ffmpeg: %v", err)
 		return
 	}
 	defer cmd.Wait()
 
-	c.Header("Content-Type", "audio/mp4")
+	//c.Header("Content-Type", "audio/aac")
+	c.Header("Content-Type", "audio/wav")
+	c.Header("Transfer-Encoding", "chunked")
+
 	if _, err := io.Copy(c.Writer, stdout); err != nil {
 		c.String(http.StatusInternalServerError, "Failed to stream audio: %v", err)
+		log.Errorf("Failed to stream audio: %v", err)
 		return
 	}
 }