From 36c95f1a1649c48a47708ef4e4bd7daa9ba00497 Mon Sep 17 00:00:00 2001
From: Spencer Russell <spencer.f.russell@gmail.com>
Date: Thu, 26 Jun 2014 16:01:06 -0500
Subject: [PATCH] adds constant offset ability. No tests!

---
 src/nodes.jl     | 16 +++++++++++++++-
 src/operators.jl |  2 ++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/nodes.jl b/src/nodes.jl
index 274a595..648b7c5 100644
--- a/src/nodes.jl
+++ b/src/nodes.jl
@@ -130,13 +130,27 @@ type GainRenderer <: AudioRenderer
 end
 
 function render(node::GainRenderer, device_input::AudioBuf, info::DeviceInfo)
-    input = render(node.in_node, device_input, info)
+    input = render(node.in_node, device_input, info)::AudioBuf
     return input .* node.gain
 end
 
 typealias Gain AudioNode{GainRenderer}
 export Gain
 
+#### Offset ####
+type OffsetRenderer <: AudioRenderer
+    in_node::AudioNode
+    offset::Float32
+end
+
+function render(node::OffsetRenderer, device_input::AudioBuf, info::DeviceInfo)
+    input = render(node.in_node, device_input, info)::AudioBuf
+    return input .+ node.offset
+end
+
+typealias Offset AudioNode{OffsetRenderer}
+export Offset
+
 
 #### Array Player ####
 
diff --git a/src/operators.jl b/src/operators.jl
index fa3ca7a..b5fa9d8 100644
--- a/src/operators.jl
+++ b/src/operators.jl
@@ -11,3 +11,5 @@
 +(in1::NullNode, in2::NullNode) = in1
 +(in1::AudioNode, in2::NullNode) = in1
 +(in1::NullNode, in2::AudioNode) = in2
++(in1::AudioNode, in2::Real) = Offset(in1, in2)
++(in1::Real, in2::AudioNode) = Offset(in1, in2)