Implement AudioWorkletProcessor interface

third_party/WebKit/Source/modules/webaudio/AudioWorkletProcessor.cpp

Index: third_party/WebKit/Source/modules/webaudio/AudioWorkletProcessor.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioWorkletProcessor.cpp b/third_party/WebKit/Source/modules/webaudio/AudioWorkletProcessor.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..8019b773e867a7f86bf8f5dac05705259aa2fdcb
--- /dev/null
+++ b/third_party/WebKit/Source/modules/webaudio/AudioWorkletProcessor.cpp
@@ -0,0 +1,40 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "modules/webaudio/AudioWorkletProcessor.h"
+
+#include "modules/webaudio/AudioBuffer.h"
+#include "modules/webaudio/AudioWorkletProcessorDefinition.h"
+
+namespace blink {
+
+// This static factory should be called implicitly when an instance of
+// |AudioWorkletNode| gets created by user-supplied JS code in the main thread.
+// This factory must not be called by user in |AudioWorkletGlobalScope|.
+AudioWorkletProcessor* AudioWorkletProcessor::create(
+    AudioWorkletProcessorDefinition* definition) {
+  return new AudioWorkletProcessor(definition);
+}
+
+AudioWorkletProcessor::AudioWorkletProcessor(
+    AudioWorkletProcessorDefinition* definition)
+    : m_definition(definition) {
+  m_definition->createInstance(m_instance);
+}
+
+AudioWorkletProcessor::~AudioWorkletProcessor() {}
+
+bool AudioWorkletProcessor::process(AudioBuffer* inputBuffer,
+                                    AudioBuffer* outputBuffer) {
+  DCHECK(m_definition);
+  DCHECK(!m_instance.isEmpty());
+
+  return m_definition->process(m_instance, inputBuffer, outputBuffer);
+}
+
+DEFINE_TRACE(AudioWorkletProcessor) {
+  visitor->trace(m_definition);
+}
+
+}  // namespace blink