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29 #ifndef HRTFDatabase_h
30 #define HRTFDatabase_h
32 #include "HRTFElevation.h"
33 #include <wtf/HashMap.h>
34 #include <wtf/Noncopyable.h>
35 #include <wtf/OwnPtr.h>
36 #include <wtf/PassRefPtr.h>
37 #include <wtf/Vector.h>
38 #include <wtf/text/CString.h>
39 #include <wtf/text/StringHash.h>
40 #include <wtf/text/WTFString.h>
47 WTF_MAKE_NONCOPYABLE(HRTFDatabase);
49 static PassOwnPtr<HRTFDatabase> create(double sampleRate);
51 // getKernelsFromAzimuthElevation() returns a left and right ear kernel, and an interpolated left and right frame delay for the given azimuth and elevation.
52 // azimuthBlend must be in the range 0 -> 1.
53 // Valid values for azimuthIndex are 0 -> HRTFElevation::NumberOfTotalAzimuths - 1 (corresponding to angles of 0 -> 360).
54 // Valid values for elevationAngle are MinElevation -> MaxElevation.
55 void getKernelsFromAzimuthElevation(double azimuthBlend, unsigned azimuthIndex, double elevationAngle, HRTFKernel* &kernelL, HRTFKernel* &kernelR, double& frameDelayL, double& frameDelayR);
57 // Returns the number of different azimuth angles.
58 static unsigned numberOfAzimuths() { return HRTFElevation::NumberOfTotalAzimuths; }
60 double sampleRate() const { return m_sampleRate; }
63 explicit HRTFDatabase(double sampleRate);
65 // Minimum and maximum elevation angles (inclusive) for a HRTFDatabase.
66 static const int MinElevation;
67 static const int MaxElevation;
68 static const unsigned RawElevationAngleSpacing;
70 // Number of elevations loaded from resource.
71 static const unsigned NumberOfRawElevations;
73 // Interpolates by this factor to get the total number of elevations from every elevation loaded from resource.
74 static const unsigned InterpolationFactor;
76 // Total number of elevations after interpolation.
77 static const unsigned NumberOfTotalElevations;
79 // Returns the index for the correct HRTFElevation given the elevation angle.
80 static unsigned indexFromElevationAngle(double);
82 Vector<OwnPtr<HRTFElevation> > m_elevations;
86 } // namespace WebCore
88 #endif // HRTFDatabase_h