replace new() with initialize() (#490)

examples/client-play-format-mpeg4audio-save-to-disk/mpegts_muxer.go

@@ -16,35 +16,31 @@ func durationGoToMPEGTS(v time.Duration) int64 {
 // mpegtsMuxer allows to save a MPEG4-audio stream into a MPEG-TS file.
 type mpegtsMuxer struct {
 	config *mpeg4audio.Config
-	f      *os.File
-	b      *bufio.Writer
-	w      *mpegts.Writer
-	track  *mpegts.Track
+
+	f     *os.File
+	b     *bufio.Writer
+	w     *mpegts.Writer
+	track *mpegts.Track
 }
 
-// newMPEGTSMuxer allocates a mpegtsMuxer.
-func newMPEGTSMuxer(config *mpeg4audio.Config) (*mpegtsMuxer, error) {
-	f, err := os.Create("mystream.ts")
+// initialize initializes a mpegtsMuxer.
+func (e *mpegtsMuxer) initialize() error {
+	var err error
+	e.f, err = os.Create("mystream.ts")
 	if err != nil {
-		return nil, err
+		return err
 	}
-	b := bufio.NewWriter(f)
+	e.b = bufio.NewWriter(e.f)
 
-	track := &mpegts.Track{
+	e.track = &mpegts.Track{
 		Codec: &mpegts.CodecMPEG4Audio{
-			Config: *config,
+			Config: *e.config,
 		},
 	}
 
-	w := mpegts.NewWriter(b, []*mpegts.Track{track})
+	e.w = mpegts.NewWriter(e.b, []*mpegts.Track{e.track})
 
-	return &mpegtsMuxer{
-		config: config,
-		f:      f,
-		b:      b,
-		w:      w,
-		track:  track,
-	}, nil
+	return nil
 }
 
 // close closes all the mpegtsMuxer resources.
@@ -53,7 +49,7 @@ func (e *mpegtsMuxer) close() {
 	e.f.Close()
 }
 
-// encode encodes MPEG-4 audio access units into MPEG-TS.
-func (e *mpegtsMuxer) encode(aus [][]byte, pts time.Duration) error {
+// writeMPEG4Audio writes MPEG-4 audio access units into MPEG-TS.
+func (e *mpegtsMuxer) writeMPEG4Audio(aus [][]byte, pts time.Duration) error {
 	return e.w.WriteMPEG4Audio(e.track, durationGoToMPEGTS(pts), aus)
 }