From 4b70585f1aebc77cecf7f79824441286f127e755 Mon Sep 17 00:00:00 2001
From: faiface <faiface@ksp.sk>
Date: Fri, 7 Jul 2017 18:46:20 +0200
Subject: [PATCH] audio: add Ctrl decorator

---
 audio/ctrl.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 audio/ctrl.go

diff --git a/audio/ctrl.go b/audio/ctrl.go
new file mode 100644
index 0000000..b0d2fe9
--- /dev/null
+++ b/audio/ctrl.go
@@ -0,0 +1,24 @@
+package audio
+
+import "time"
+
+type Ctrl struct {
+	Streamer Streamer
+	Paused   bool
+	Duration time.Duration
+}
+
+func (c *Ctrl) Stream(samples [][2]float64) (n int, ok bool) {
+	if c.Streamer == nil {
+		return 0, false
+	}
+	if c.Paused {
+		for i := range samples {
+			samples[i] = [2]float64{}
+		}
+		return len(samples), true
+	}
+	n, ok = c.Streamer.Stream(samples)
+	c.Duration += time.Duration(n) * time.Second / time.Duration(SampleRate)
+	return n, ok
+}