Added first layer of the echo canceller 3 functionality

webrtc/modules/audio_processing/aec3/render_transfer_buffer.cc

Index: webrtc/modules/audio_processing/aec3/render_transfer_buffer.cc
diff --git a/webrtc/modules/audio_processing/aec3/render_transfer_buffer.cc b/webrtc/modules/audio_processing/aec3/render_transfer_buffer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c303e87550e3f506d5313d155230a685c582a2e4
--- /dev/null
+++ b/webrtc/modules/audio_processing/aec3/render_transfer_buffer.cc
@@ -0,0 +1,39 @@
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/modules/audio_processing/aec3/render_transfer_buffer.h"
+
+#include <memory>
+
+namespace webrtc {
+
+RenderTransferBufferWriter::~RenderTransferBufferWriter() {}

[hlundin-webrtc, 2016/12/16 10:04:48]

= default

[peah-webrtc, 2016/12/20 10:10:26]

I have removed this class in the new patch.
Done.

+
+RenderTransferBuffer::RenderTransferBuffer(size_t num_bands,
+                                           size_t frame_length)
+    : queue_(kQueueSize,
+             std::vector<float>(num_bands * frame_length),
+             RenderQueueItemVerifier<float>(num_bands * frame_length)),
+      frame_(num_bands * frame_length, 0.f) {
+  queue_.Clear();

[hlundin-webrtc, 2016/12/16 10:04:47]

What does Clear() do on top of the ctor?

[peah-webrtc, 2016/12/20 10:10:26]

I have removed this class in the new patch.
Done.

+}
+
+RenderTransferBuffer::~RenderTransferBuffer() {}

[hlundin-webrtc, 2016/12/16 10:04:48]

= default

[peah-webrtc, 2016/12/20 10:10:26]

I have removed this class in the new patch.
Done.

+
+bool RenderTransferBuffer::Insert(std::vector<float>* frame) {
+  return queue_.Insert(frame);
+}
+
+bool RenderTransferBuffer::Remove(std::vector<float>* frame) {
+  bool result = queue_.Remove(frame);

[hlundin-webrtc, 2016/12/16 10:04:47]

Why the local storage in result?

[peah-webrtc, 2016/12/20 10:10:26]

I have removed this class in the new patch.
Done.

+  return result;
+}
+
+}  // namespace webrtc