Line data    Source code

       1             : /*
       2             :  * Copyright (C) 2010 Google Inc. All rights reserved.
       3             :  *
       4             :  * Redistribution and use in source and binary forms, with or without
       5             :  * modification, are permitted provided that the following conditions
       6             :  * are met:
       7             :  *
       8             :  * 1.  Redistributions of source code must retain the above copyright
       9             :  *     notice, this list of conditions and the following disclaimer.
      10             :  * 2.  Redistributions in binary form must reproduce the above copyright
      11             :  *     notice, this list of conditions and the following disclaimer in the
      12             :  *     documentation and/or other materials provided with the distribution.
      13             :  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
      14             :  *     its contributors may be used to endorse or promote products derived
      15             :  *     from this software without specific prior written permission.
      16             :  *
      17             :  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
      18             :  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
      19             :  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
      20             :  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
      21             :  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
      22             :  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
      23             :  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
      24             :  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      25             :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      26             :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      27             :  */
      28             : 
      29             : #ifndef Reverb_h
      30             : #define Reverb_h
      31             : 
      32             : #include "ReverbConvolver.h"
      33             : #include "nsAutoPtr.h"
      34             : #include "nsTArray.h"
      35             : #include "AudioBlock.h"
      36             : #include "mozilla/MemoryReporting.h"
      37             : 
      38             : namespace mozilla {
      39             : class ThreadSharedFloatArrayBufferList;
      40             : } // namespace mozilla
      41             : 
      42             : namespace WebCore {
      43             : 
      44             : // Multi-channel convolution reverb with channel matrixing - one or more ReverbConvolver objects are used internally.
      45             : 
      46           0 : class Reverb {
      47             : public:
      48             :     enum { MaxFrameSize = 256 };
      49             : 
      50             :     // 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).
      51             :     Reverb(mozilla::ThreadSharedFloatArrayBufferList* impulseResponseBuffer,
      52             :            size_t impulseResponseBufferLength, size_t maxFFTSize,
      53             :            size_t numberOfChannels, bool useBackgroundThreads, bool normalize,
      54             :            float sampleRate);
      55             : 
      56             :     void process(const mozilla::AudioBlock* sourceBus,
      57             :                  mozilla::AudioBlock* destinationBus);
      58             : 
      59             :     size_t impulseResponseLength() const { return m_impulseResponseLength; }
      60             : 
      61             :     size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
      62             : 
      63             : private:
      64             :     void initialize(const nsTArray<const float*>& impulseResponseBuffer,
      65             :                     size_t impulseResponseBufferLength, size_t maxFFTSize,
      66             :                     size_t numberOfChannels, bool useBackgroundThreads);
      67             : 
      68             :     size_t m_impulseResponseLength;
      69             : 
      70             :     nsTArray<nsAutoPtr<ReverbConvolver> > m_convolvers;
      71             : 
      72             :     // For "True" stereo processing
      73             :     mozilla::AudioBlock m_tempBuffer;
      74             : };
      75             : 
      76             : } // namespace WebCore
      77             : 
      78             : #endif // Reverb_h