From b0f92856bebfcd83f78cea366d0937f66de9a367 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Thu, 14 Jan 2016 02:43:31 +0100
Subject: replace volume with level for metering


diff --git a/player/player.go b/player/player.go
index facf291..60a19fa 100644
--- a/player/player.go
+++ b/player/player.go
@@ -83,7 +83,7 @@ const (
 type Player struct {
 	pipe      *gst.Pipeline
 	src       *gst.Element
-	volume    *gst.Element
+	level     *gst.Element
 	bus       *gst.Bus
 	basepath  string
 	stdlog    *log.Logger
@@ -116,6 +116,8 @@ func (p *Player) onMessage(bus *gst.Bus, msg *gst.Message) {
 		} else {
 			p.stdlog.Printf("GStreamer Pipeline Error: unable to query duration of file\n")
 		}
+	case gst.MESSAGE_ELEMENT:
+		p.stdlog.Printf("GStreamer Message: from element '%s'\n", msg.GetSourceName())
 	case gst.MESSAGE_STATE_CHANGED:
 	default:
 		p.stdlog.Printf("GStreamer Message: unknown type '%s'\n", msg.GetTypeName())
@@ -216,9 +218,12 @@ func (p *Player) createPipeline() (err error) {
 	if conv1, err = gst.ElementFactoryMake("audioconvert", "conv1"); err != nil {
 		return
 	}
-	if p.volume, err = gst.ElementFactoryMake("volume", "meter"); err != nil {
+	if p.level, err = gst.ElementFactoryMake("level", "meter"); err != nil {
 		return
 	}
+	p.level.SetProperty("message", true)
+	p.level.SetProperty("peak-ttl", 300000000)
+	p.level.SetProperty("peak-falloff", 25)
 	if conv2, err = gst.ElementFactoryMake("audioconvert", "conv2"); err != nil {
 		return
 	}
@@ -228,7 +233,7 @@ func (p *Player) createPipeline() (err error) {
 
 	p.pipe.Add(p.src)
 	p.pipe.Add(conv1)
-	p.pipe.Add(p.volume)
+	p.pipe.Add(p.level)
 	p.pipe.Add(conv2)
 	p.pipe.Add(sink)
 
@@ -242,8 +247,8 @@ func (p *Player) createPipeline() (err error) {
 		}
 		p.dbglog.Println("player succesfully linked src with conv1")
 	})
-	conv1.Link(p.volume)
-	p.volume.Link(conv2)
+	conv1.Link(p.level)
+	p.level.Link(conv2)
 	conv2.Link(sink)
 
 	if p.bus, err = p.pipe.GetBus(); err != nil {
-- 
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