1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/blink/HRTFDatabase.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,94 @@
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 HRTFDatabase_h
1.33 +#define HRTFDatabase_h
1.34 +
1.35 +#include "HRTFElevation.h"
1.36 +#include "nsAutoRef.h"
1.37 +#include "nsTArray.h"
1.38 +#include "mozilla/MemoryReporting.h"
1.39 +
1.40 +namespace WebCore {
1.41 +
1.42 +class HRTFKernel;
1.43 +
1.44 +class HRTFDatabase {
1.45 +public:
1.46 + static nsReturnRef<HRTFDatabase> create(float sampleRate);
1.47 +
1.48 + // getKernelsFromAzimuthElevation() returns a left and right ear kernel, and an interpolated left and right frame delay for the given azimuth and elevation.
1.49 + // azimuthBlend must be in the range 0 -> 1.
1.50 + // Valid values for azimuthIndex are 0 -> HRTFElevation::NumberOfTotalAzimuths - 1 (corresponding to angles of 0 -> 360).
1.51 + // Valid values for elevationAngle are MinElevation -> MaxElevation.
1.52 + void getKernelsFromAzimuthElevation(double azimuthBlend, unsigned azimuthIndex, double elevationAngle, HRTFKernel* &kernelL, HRTFKernel* &kernelR, double& frameDelayL, double& frameDelayR);
1.53 +
1.54 + // Returns the number of different azimuth angles.
1.55 + static unsigned numberOfAzimuths() { return HRTFElevation::NumberOfTotalAzimuths; }
1.56 +
1.57 + float sampleRate() const { return m_sampleRate; }
1.58 +
1.59 + // Number of elevations loaded from resource.
1.60 + static const unsigned NumberOfRawElevations;
1.61 +
1.62 + size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
1.63 +
1.64 +private:
1.65 + HRTFDatabase(const HRTFDatabase& other) MOZ_DELETE;
1.66 + void operator=(const HRTFDatabase& other) MOZ_DELETE;
1.67 +
1.68 + explicit HRTFDatabase(float sampleRate);
1.69 +
1.70 + // Minimum and maximum elevation angles (inclusive) for a HRTFDatabase.
1.71 + static const int MinElevation;
1.72 + static const int MaxElevation;
1.73 + static const unsigned RawElevationAngleSpacing;
1.74 +
1.75 + // Interpolates by this factor to get the total number of elevations from every elevation loaded from resource.
1.76 + static const unsigned InterpolationFactor;
1.77 +
1.78 + // Total number of elevations after interpolation.
1.79 + static const unsigned NumberOfTotalElevations;
1.80 +
1.81 + // Returns the index for the correct HRTFElevation given the elevation angle.
1.82 + static unsigned indexFromElevationAngle(double);
1.83 +
1.84 + nsTArray<nsAutoRef<HRTFElevation> > m_elevations;
1.85 + float m_sampleRate;
1.86 +};
1.87 +
1.88 +} // namespace WebCore
1.89 +
1.90 +template <>
1.91 +class nsAutoRefTraits<WebCore::HRTFDatabase> :
1.92 + public nsPointerRefTraits<WebCore::HRTFDatabase> {
1.93 +public:
1.94 + static void Release(WebCore::HRTFDatabase* ptr) { delete(ptr); }
1.95 +};
1.96 +
1.97 +#endif // HRTFDatabase_h
