tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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Reverb.h (3146B)

      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 "AudioBlock.h"
     33 #include "ReverbConvolver.h"
     34 #include "mozilla/MemoryReporting.h"
     35 #include "mozilla/UniquePtr.h"
     36 #include "nsTArray.h"
     37 
     38 namespace WebCore {
     39 
     40 using mozilla::UniquePtr;
     41 
     42 // Multi-channel convolution reverb with channel matrixing - one or more
     43 // ReverbConvolver objects are used internally.
     44 
     45 class Reverb {
     46 public:
     47  enum { MaxFrameSize = 256 };
     48 
     49  // renderSliceSize is a rendering hint, so the FFTs can be optimized to not
     50  // all occur at the same time (very bad when rendering on a real-time thread).
     51  // aAllocation failure is to be checked by the caller. If false, internal
     52  // memory could not be allocated, and this Reverb instance is not to be
     53  // used.
     54  Reverb(const mozilla::AudioChunk& impulseResponseBuffer, size_t maxFFTSize,
     55         bool useBackgroundThreads, bool normalize, float sampleRate,
     56         bool* aAllocationFailure);
     57 
     58  void process(const mozilla::AudioBlock* sourceBus,
     59               mozilla::AudioBlock* destinationBus);
     60 
     61  size_t impulseResponseLength() const { return m_impulseResponseLength; }
     62 
     63  size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
     64 
     65 private:
     66  bool initialize(const nsTArray<const float*>& impulseResponseBuffer,
     67                  size_t impulseResponseBufferLength, size_t maxFFTSize,
     68                  bool useBackgroundThreads);
     69 
     70  size_t m_impulseResponseLength;
     71 
     72  nsTArray<UniquePtr<ReverbConvolver> > m_convolvers;
     73 
     74  // For "True" stereo processing
     75  mozilla::AudioBlock m_tempBuffer;
     76 };
     77 
     78 }  // namespace WebCore
     79 
     80 #endif  // Reverb_h