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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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+/*
+ * 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 ReverbConvolver_h
+#define ReverbConvolver_h
+
+#include "ReverbAccumulationBuffer.h"
+#include "ReverbInputBuffer.h"
+#include "nsAutoPtr.h"
+#include "mozilla/MemoryReporting.h"
+#ifdef LOG
+#undef LOG
+#endif
+#include "base/condition_variable.h"
+#include "base/lock.h"
+#include "base/thread.h"
+
+namespace WebCore {
+
+class ReverbConvolverStage;
+
+class ReverbConvolver {
+public:
+ // maxFFTSize can be adjusted (from say 2048 to 32768) depending on how much precision is necessary.
+ // For certain tweaky de-convolving applications the phase errors add up quickly and lead to non-sensical results with
+ // larger FFT sizes and single-precision floats. In these cases 2048 is a good size.
+ // If not doing multi-threaded convolution, then should not go > 8192.
+ ReverbConvolver(const float* impulseResponseData,
+ size_t impulseResponseLength, size_t maxFFTSize,
+ size_t convolverRenderPhase, bool useBackgroundThreads);
+ ~ReverbConvolver();
+
+ void process(const float* sourceChannelData,
+ float* destinationChannelData);
+
+ size_t impulseResponseLength() const { return m_impulseResponseLength; }
+
+ ReverbInputBuffer* inputBuffer() { return &m_inputBuffer; }
+
+ bool useBackgroundThreads() const { return m_useBackgroundThreads; }
+ void backgroundThreadEntry();
+
+ size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+private:
+ nsTArray<nsAutoPtr<ReverbConvolverStage> > m_stages;
+ nsTArray<nsAutoPtr<ReverbConvolverStage> > m_backgroundStages;
+ size_t m_impulseResponseLength;
+
+ ReverbAccumulationBuffer m_accumulationBuffer;
+
+ // One or more background threads read from this input buffer which is fed from the realtime thread.
+ ReverbInputBuffer m_inputBuffer;
+
+ // Background thread and synchronization
+ base::Thread m_backgroundThread;
+ Lock m_backgroundThreadLock;
+ ConditionVariable m_backgroundThreadCondition;
+ bool m_useBackgroundThreads;
+ bool m_wantsToExit;
+ bool m_moreInputBuffered;
+};
+
+} // namespace WebCore
+
+#endif // ReverbConvolver_h