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95 lines
3.9 KiB
C++
95 lines
3.9 KiB
C++
/*
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* Copyright (C) 2010 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef HRTFDatabase_h
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#define HRTFDatabase_h
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#include "HRTFElevation.h"
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#include "nsAutoRef.h"
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#include "nsTArray.h"
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#include "mozilla/MemoryReporting.h"
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namespace WebCore {
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class HRTFKernel;
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class HRTFDatabase {
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public:
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static nsReturnRef<HRTFDatabase> create(float sampleRate);
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// getKernelsFromAzimuthElevation() returns a left and right ear kernel, and an interpolated left and right frame delay for the given azimuth and elevation.
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// azimuthBlend must be in the range 0 -> 1.
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// Valid values for azimuthIndex are 0 -> HRTFElevation::NumberOfTotalAzimuths - 1 (corresponding to angles of 0 -> 360).
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// Valid values for elevationAngle are MinElevation -> MaxElevation.
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void getKernelsFromAzimuthElevation(double azimuthBlend, unsigned azimuthIndex, double elevationAngle, HRTFKernel* &kernelL, HRTFKernel* &kernelR, double& frameDelayL, double& frameDelayR);
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// Returns the number of different azimuth angles.
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static unsigned numberOfAzimuths() { return HRTFElevation::NumberOfTotalAzimuths; }
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float sampleRate() const { return m_sampleRate; }
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// Number of elevations loaded from resource.
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static const unsigned NumberOfRawElevations;
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size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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private:
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HRTFDatabase(const HRTFDatabase& other) MOZ_DELETE;
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void operator=(const HRTFDatabase& other) MOZ_DELETE;
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explicit HRTFDatabase(float sampleRate);
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// Minimum and maximum elevation angles (inclusive) for a HRTFDatabase.
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static const int MinElevation;
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static const int MaxElevation;
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static const unsigned RawElevationAngleSpacing;
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// Interpolates by this factor to get the total number of elevations from every elevation loaded from resource.
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static const unsigned InterpolationFactor;
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// Total number of elevations after interpolation.
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static const unsigned NumberOfTotalElevations;
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// Returns the index for the correct HRTFElevation given the elevation angle.
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static unsigned indexFromElevationAngle(double);
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nsTArray<nsAutoRef<HRTFElevation> > m_elevations;
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float m_sampleRate;
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};
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} // namespace WebCore
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template <>
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class nsAutoRefTraits<WebCore::HRTFDatabase> :
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public nsPointerRefTraits<WebCore::HRTFDatabase> {
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public:
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static void Release(WebCore::HRTFDatabase* ptr) { delete(ptr); }
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};
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#endif // HRTFDatabase_h
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