1 files changed, 80 insertions, 0 deletions
diff --git a/dom/media/webaudio/blink/Reverb.h b/dom/media/webaudio/blink/Reverb.h
new file mode 100644
index 0000000000..16459532a9
--- /dev/null
+++ b/dom/media/webaudio/blink/Reverb.h
@@ -0,0 +1,80 @@
+/*
+ * 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
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * 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.
+ */
+
+#ifndef Reverb_h
+#define Reverb_h
+
+#include "ReverbConvolver.h"
+#include "nsTArray.h"
+#include "AudioBlock.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/UniquePtr.h"
+
+namespace WebCore {
+
+using mozilla::UniquePtr;
+
+// Multi-channel convolution reverb with channel matrixing - one or more
+// ReverbConvolver objects are used internally.
+
+class Reverb {
+ public:
+  enum { MaxFrameSize = 256 };
+
+  // renderSliceSize is a rendering hint, so the FFTs can be optimized to not
+  // all occur at the same time (very bad when rendering on a real-time thread).
+  // aAllocation failure is to be checked by the caller. If false, internal
+  // memory could not be allocated, and this Reverb instance is not to be
+  // used.
+  Reverb(const mozilla::AudioChunk& impulseResponseBuffer, size_t maxFFTSize,
+         bool useBackgroundThreads, bool normalize, float sampleRate,
+         bool* aAllocationFailure);
+
+  void process(const mozilla::AudioBlock* sourceBus,
+               mozilla::AudioBlock* destinationBus);
+
+  size_t impulseResponseLength() const { return m_impulseResponseLength; }
+
+  size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+ private:
+  bool initialize(const nsTArray<const float*>& impulseResponseBuffer,
+                  size_t impulseResponseBufferLength, size_t maxFFTSize,
+                  bool useBackgroundThreads);
+
+  size_t m_impulseResponseLength;
+
+  nsTArray<UniquePtr<ReverbConvolver> > m_convolvers;
+
+  // For "True" stereo processing
+  mozilla::AudioBlock m_tempBuffer;
+};
+
+}  // namespace WebCore
+
+#endif  // Reverb_h