Add constructors for WebAudio nodes

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

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
 #include "modules/webaudio/AudioBuffer.h"
 #include "modules/webaudio/AudioNodeInput.h"
 #include "modules/webaudio/AudioNodeOutput.h"
 #include "modules/webaudio/ConvolverNode.h"
+#include "modules/webaudio/ConvolverOptions.h"
 #include "platform/audio/Reverb.h"
 #include "wtf/PtrUtil.h"
 #include <memory>
 
 // Note about empirical tuning:
 // The maximum FFT size affects reverb performance and accuracy.
 // If the reverb is single-threaded and processes entirely in the real-time audio thread,
 // it's important not to make this too high.  In this case 8192 is a good value.
 // But, the Reverb object is multi-threaded, so we want this as high as possible without losing too much accuracy.
 // Very large FFTs will have worse phase errors. Given these constraints 32768 is a good compromise.
@@ skipping 137 matching lines @@
     DCHECK(isMainThread());
 
     if (context.isContextClosed()) {
         context.throwExceptionForClosedState(exceptionState);
         return nullptr;
     }
 
     return new ConvolverNode(context);
 }
 
+ConvolverNode* ConvolverNode::create(BaseAudioContext* context, const ConvolverOptions& options, ExceptionState& exceptionState)
+{
+    ConvolverNode* node = create(*context, exceptionState);
+
+    if (!node)
+        return node;
+
+    node->handleChannelOptions(options, exceptionState);
+
+    // It is important to set normalize first because setting the buffer will
+    // examing the normalize attribute to see if normalization needs to be done.
+    node->setNormalize(!options.disableNormalization());
+    if (options.hasBuffer())
+        node->setBuffer(options.buffer(), exceptionState);
+    return node;
+}
+
 ConvolverHandler& ConvolverNode::convolverHandler() const
 {
     return static_cast<ConvolverHandler&>(handler());
 }
 
 AudioBuffer* ConvolverNode::buffer() const
 {
     return convolverHandler().buffer();
 }
 
 void ConvolverNode::setBuffer(AudioBuffer* newBuffer, ExceptionState& exceptionState)
 {
     convolverHandler().setBuffer(newBuffer, exceptionState);
 }
 
 bool ConvolverNode::normalize() const
 {
     return convolverHandler().normalize();
 }
 
 void ConvolverNode::setNormalize(bool normalize)
 {
     convolverHandler().setNormalize(normalize);
 }
 
 } // namespace blink