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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 HRTFDatabase_h
#define HRTFDatabase_h
#include "HRTFElevation.h"
#include "nsAutoRef.h"
#include "nsTArray.h"
#include "mozilla/MemoryReporting.h"
namespace WebCore {
class HRTFKernel;
class HRTFDatabase {
public:
static nsReturnRef<HRTFDatabase> create(float sampleRate);
// getKernelsFromAzimuthElevation() returns a left and right ear kernel, and an interpolated left and right frame delay for the given azimuth and elevation.
// azimuthBlend must be in the range 0 -> 1.
// Valid values for azimuthIndex are 0 -> HRTFElevation::NumberOfTotalAzimuths - 1 (corresponding to angles of 0 -> 360).
// Valid values for elevationAngle are MinElevation -> MaxElevation.
void getKernelsFromAzimuthElevation(double azimuthBlend, unsigned azimuthIndex, double elevationAngle, HRTFKernel* &kernelL, HRTFKernel* &kernelR, double& frameDelayL, double& frameDelayR);
// Returns the number of different azimuth angles.
static unsigned numberOfAzimuths() { return HRTFElevation::NumberOfTotalAzimuths; }
float sampleRate() const { return m_sampleRate; }
// Number of elevations loaded from resource.
static const unsigned NumberOfRawElevations;
size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
private:
HRTFDatabase(const HRTFDatabase& other) = delete;
void operator=(const HRTFDatabase& other) = delete;
explicit HRTFDatabase(float sampleRate);
// Minimum and maximum elevation angles (inclusive) for a HRTFDatabase.
static const int MinElevation;
static const int MaxElevation;
static const unsigned RawElevationAngleSpacing;
// Interpolates by this factor to get the total number of elevations from every elevation loaded from resource.
static const unsigned InterpolationFactor;
// Total number of elevations after interpolation.
static const unsigned NumberOfTotalElevations;
// Returns the index for the correct HRTFElevation given the elevation angle.
static unsigned indexFromElevationAngle(double);
nsTArray<nsAutoRef<HRTFElevation> > m_elevations;
float m_sampleRate;
};
} // namespace WebCore
template <>
class nsAutoRefTraits<WebCore::HRTFDatabase> :
public nsPointerRefTraits<WebCore::HRTFDatabase> {
public:
static void Release(WebCore::HRTFDatabase* ptr) { delete(ptr); }
};
#endif // HRTFDatabase_h
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