declank · June 10, 2015 22:19 · Jun 10, 2015
diff --git a/go-play-music.go b/go-play-music.go
@@ -0,0 +1,61 @@
+package main
+
+import (
+    "code.google.com/p/portaudio-go/portaudio"
+    "encoding/binary"
+    "log"
+    "io"
+    "os"
+    "os/exec"
+)
+
+func getAudioFileArg() (filename string) {
+    if len(os.Args) < 2 {
+        log.Fatal("Missing argument: input file name")
+    }
+    filename = os.Args[1]
+    return
+}
+
+func chk(err error) {
+    if err != nil {
+        log.Fatal(err)
+    }
+}
+
+func createFfmpegPipe(filename string) (output io.ReadCloser) {
+    cmd := exec.Command("ffmpeg", "-i", filename, "-f", "s16le", "-")
+    output, err := cmd.StdoutPipe()
+    chk(err)
+
+    err = cmd.Start()
+    chk(err)
+
+    return
+}
+
+func playAudioFile(filename string) {
+    output := createFfmpegPipe(filename)
+
+    portaudio.Initialize()
+    defer portaudio.Terminate()
+
+    audiobuf := make([]int16, 16384)
+    stream, err := portaudio.OpenDefaultStream(0, 2, 44100, len(audiobuf), &audiobuf)
+    chk(err)    
+    defer stream.Close()
+
+    chk(stream.Start())
+    defer stream.Stop()
+
+    for err = binary.Read(output, binary.LittleEndian, &audiobuf); err == nil; err = binary.Read(output, binary.LittleEndian, &audiobuf) {
+        chk(stream.Write())
+    }
+
+    chk(err) 
+}
+
+func main() {
+    filename := getAudioFileArg()    
+    playAudioFile(filename)
+}