Add constructors for WebAudio nodes

third_party/WebKit/Source/modules/webaudio/AudioBuffer.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
@@ skipping 13 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (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 "modules/webaudio/AudioBuffer.h"
 
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
+#include "modules/webaudio/AudioBufferOptions.h"
 #include "modules/webaudio/BaseAudioContext.h"
 #include "platform/audio/AudioBus.h"
 #include "platform/audio/AudioFileReader.h"
 #include "platform/audio/AudioUtilities.h"
 #include "wtf/typed_arrays/Float32Array.h"
 
 namespace blink {
 
 AudioBuffer* AudioBuffer::create(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
 {
@@ skipping 53 matching lines @@
             "createBuffer("
             + String::number(numberOfChannels) + ", "
             + String::number(numberOfFrames) + ", "
             + String::number(sampleRate)
             + ") failed.");
     }
 
     return audioBuffer;
 }
 
+AudioBuffer* AudioBuffer::create(BaseAudioContext* context, const AudioBufferOptions& options, ExceptionState& exceptionState)
+{
+    unsigned numberOfChannels;
+    size_t numberOfFrames;
+    float sampleRate;
+
+    if (!options.hasNumberOfChannels()) {
+        exceptionState.throwDOMException(
+            NotFoundError,
+            "AudioBufferOptions: numberOfChannels is required.");
+        return nullptr;
+    }
+
+    if (!options.hasLength()) {
+        exceptionState.throwDOMException(
+            NotFoundError,
+            "AudioBufferOptions: length is required.");
+        return nullptr;
+    }
+
+    numberOfChannels = options.numberOfChannels();
+    numberOfFrames = options.length();
+
+    if (options.hasSampleRate())
+        sampleRate = options.sampleRate();
+    else
+        sampleRate = context->sampleRate();
+
+    return create(numberOfChannels, numberOfFrames, sampleRate, exceptionState);
+}
+
 AudioBuffer* AudioBuffer::createFromAudioFileData(const void* data, size_t dataSize, bool mixToMono, float sampleRate)
 {
     RefPtr<AudioBus> bus = createBusFromInMemoryAudioFile(data, dataSize, mixToMono, sampleRate);
     if (bus) {
         AudioBuffer* buffer = new AudioBuffer(bus.get());
         if (buffer->createdSuccessfully(bus->numberOfChannels()))
             return buffer;
     }
 
     return nullptr;
@@ skipping 181 matching lines @@
     for (unsigned i = 0; i < m_channels.size(); ++i) {
         if (DOMFloat32Array* array = getChannelData(i)) {
             float* data = array->data();
             memset(data, 0, length() * sizeof(*data));
         }
     }
 }
 
 } // namespace blink