From 330e9da360bbff665d5a89b85b8927dcabad0243 Mon Sep 17 00:00:00 2001
From: faiface <faiface@ksp.sk>
Date: Mon, 3 Jul 2017 19:07:30 +0200
Subject: [PATCH] add StreamerFunc helper type
---
audio/interface.go | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/audio/interface.go b/audio/interface.go
index 395548c..d426beb 100644
--- a/audio/interface.go
+++ b/audio/interface.go
@@ -36,3 +36,22 @@ type Streamer interface {
// following calls.
Stream(samples [][2]float64) (n int, ok bool)
}
+
+// StreamerFunc is a Streamer created by simply wrapping a streaming function (usually a closure,
+// which encloses a time tracking variable). This sometimes simplifies creating new streamers.
+//
+// Example:
+//
+// noise := StreamerFunc(func(samples [][2]float64) (n int, ok bool) {
+// for i := range samples {
+// samples[i][0] = rand.Float64()*2 - 1
+// samples[i][1] = rand.Float64()*2 - 1
+// }
+// return len(samples), true
+// })
+type StreamerFunc func(samples [][2]float64) (n int, ok bool)
+
+// Stream calls the wrapped streaming function.
+func (sf StreamerFunc) Stream(samples [][2]float64) (n int, ok bool) {
+ return sf(samples)
+}
--
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