1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/blink/Reverb.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,77 @@
1.4 +/*
1.5 + * Copyright (C) 2010 Google Inc. All rights reserved.
1.6 + *
1.7 + * Redistribution and use in source and binary forms, with or without
1.8 + * modification, are permitted provided that the following conditions
1.9 + * are met:
1.10 + *
1.11 + * 1. Redistributions of source code must retain the above copyright
1.12 + * notice, this list of conditions and the following disclaimer.
1.13 + * 2. Redistributions in binary form must reproduce the above copyright
1.14 + * notice, this list of conditions and the following disclaimer in the
1.15 + * documentation and/or other materials provided with the distribution.
1.16 + * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
1.17 + * its contributors may be used to endorse or promote products derived
1.18 + * from this software without specific prior written permission.
1.19 + *
1.20 + * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
1.21 + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
1.22 + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
1.23 + * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
1.24 + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
1.25 + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
1.26 + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
1.27 + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
1.28 + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
1.29 + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.30 + */
1.31 +
1.32 +#ifndef Reverb_h
1.33 +#define Reverb_h
1.34 +
1.35 +#include "ReverbConvolver.h"
1.36 +#include "nsAutoPtr.h"
1.37 +#include "nsTArray.h"
1.38 +#include "AudioSegment.h"
1.39 +#include "mozilla/MemoryReporting.h"
1.40 +
1.41 +namespace mozilla {
1.42 +class ThreadSharedFloatArrayBufferList;
1.43 +}
1.44 +
1.45 +namespace WebCore {
1.46 +
1.47 +class DirectConvolver;
1.48 +class FFTConvolver;
1.49 +
1.50 +// Multi-channel convolution reverb with channel matrixing - one or more ReverbConvolver objects are used internally.
1.51 +
1.52 +class Reverb {
1.53 +public:
1.54 + enum { MaxFrameSize = 256 };
1.55 +
1.56 + // 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).
1.57 + Reverb(mozilla::ThreadSharedFloatArrayBufferList* impulseResponseBuffer, size_t impulseResponseBufferLength, size_t renderSliceSize, size_t maxFFTSize, size_t numberOfChannels, bool useBackgroundThreads, bool normalize, float sampleRate);
1.58 +
1.59 + void process(const mozilla::AudioChunk* sourceBus, mozilla::AudioChunk* destinationBus, size_t framesToProcess);
1.60 + void reset();
1.61 +
1.62 + size_t impulseResponseLength() const { return m_impulseResponseLength; }
1.63 + size_t latencyFrames() const;
1.64 +
1.65 + size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
1.66 +
1.67 +private:
1.68 + void initialize(const nsTArray<const float*>& impulseResponseBuffer, size_t impulseResponseBufferLength, size_t renderSliceSize, size_t maxFFTSize, size_t numberOfChannels, bool useBackgroundThreads);
1.69 +
1.70 + size_t m_impulseResponseLength;
1.71 +
1.72 + nsTArray<nsAutoPtr<ReverbConvolver> > m_convolvers;
1.73 +
1.74 + // For "True" stereo processing
1.75 + mozilla::AudioChunk m_tempBuffer;
1.76 +};
1.77 +
1.78 +} // namespace WebCore
1.79 +
1.80 +#endif // Reverb_h
