tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

HRTFDatabase.h (4138B)

      1 /*
      2 * Copyright (C) 2010 Google Inc. All rights reserved.
      3 *
      4 * Redistribution and use in source and binary forms, with or without
      5 * modification, are permitted provided that the following conditions
      6 * are met:
      7 *
      8 * 1.  Redistributions of source code must retain the above copyright
      9 *     notice, this list of conditions and the following disclaimer.
     10 * 2.  Redistributions in binary form must reproduce the above copyright
     11 *     notice, this list of conditions and the following disclaimer in the
     12 *     documentation and/or other materials provided with the distribution.
     13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14 *     its contributors may be used to endorse or promote products derived
     15 *     from this software without specific prior written permission.
     16 *
     17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 */
     28 
     29 #ifndef HRTFDatabase_h
     30 #define HRTFDatabase_h
     31 
     32 #include "HRTFElevation.h"
     33 #include "mozilla/MemoryReporting.h"
     34 #include "nsAutoRef.h"
     35 #include "nsTArray.h"
     36 
     37 namespace WebCore {
     38 
     39 class HRTFKernel;
     40 
     41 class HRTFDatabase {
     42 public:
     43  static nsReturnRef<HRTFDatabase> create(float sampleRate);
     44 
     45  // clang-format off
     46    // getKernelsFromAzimuthElevation() returns a left and right ear kernel, and an interpolated left and right frame delay for the given azimuth and elevation.
     47    // azimuthBlend must be in the range 0 -> 1.
     48    // Valid values for azimuthIndex are 0 -> HRTFElevation::NumberOfTotalAzimuths - 1 (corresponding to angles of 0 -> 360).
     49    // Valid values for elevationAngle are MinElevation -> MaxElevation.
     50  // clang-format on
     51  void getKernelsFromAzimuthElevation(double azimuthBlend,
     52                                      unsigned azimuthIndex,
     53                                      double elevationAngle,
     54                                      HRTFKernel*& kernelL,
     55                                      HRTFKernel*& kernelR, double& frameDelayL,
     56                                      double& frameDelayR);
     57 
     58  // Returns the number of different azimuth angles.
     59  static unsigned numberOfAzimuths() {
     60    return HRTFElevation::NumberOfTotalAzimuths;
     61  }
     62 
     63  float sampleRate() const { return m_sampleRate; }
     64 
     65  // Number of elevations loaded from resource.
     66  static const unsigned NumberOfRawElevations;
     67 
     68  size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
     69 
     70 private:
     71  HRTFDatabase(const HRTFDatabase& other) = delete;
     72  void operator=(const HRTFDatabase& other) = delete;
     73 
     74  explicit HRTFDatabase(float sampleRate);
     75 
     76  // Minimum and maximum elevation angles (inclusive) for a HRTFDatabase.
     77  static const int MinElevation;
     78  static const int MaxElevation;
     79  static const unsigned RawElevationAngleSpacing;
     80 
     81  // Interpolates by this factor to get the total number of elevations from
     82  // every elevation loaded from resource.
     83  static const unsigned InterpolationFactor;
     84 
     85  // Total number of elevations after interpolation.
     86  static const unsigned NumberOfTotalElevations;
     87 
     88  // Returns the index for the correct HRTFElevation given the elevation angle.
     89  static unsigned indexFromElevationAngle(double);
     90 
     91  nsTArray<nsAutoRef<HRTFElevation> > m_elevations;
     92  float m_sampleRate;
     93 };
     94 
     95 }  // namespace WebCore
     96 
     97 template <>
     98 class nsAutoRefTraits<WebCore::HRTFDatabase>
     99    : public nsPointerRefTraits<WebCore::HRTFDatabase> {
    100 public:
    101  static void Release(WebCore::HRTFDatabase* ptr) { delete (ptr); }
    102 };
    103 
    104 #endif  // HRTFDatabase_h