content/media/webaudio/blink/HRTFDatabase.h@6474c204b198 (annotated)
content/media/webaudio/blink/HRTFDatabase.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright (C) 2010 Google Inc. All rights reserved. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Redistribution and use in source and binary forms, with or without |
| michael@0 | 5 | * modification, are permitted provided that the following conditions |
| michael@0 | 6 | * are met: |
| michael@0 | 7 | * |
| michael@0 | 8 | * 1. Redistributions of source code must retain the above copyright |
| michael@0 | 9 | * notice, this list of conditions and the following disclaimer. |
| michael@0 | 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| michael@0 | 11 | * notice, this list of conditions and the following disclaimer in the |
| michael@0 | 12 | * documentation and/or other materials provided with the distribution. |
| michael@0 | 13 | * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
| michael@0 | 14 | * its contributors may be used to endorse or promote products derived |
| michael@0 | 15 | * from this software without specific prior written permission. |
| michael@0 | 16 | * |
| michael@0 | 17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| michael@0 | 18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| michael@0 | 19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| michael@0 | 20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| michael@0 | 21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| michael@0 | 22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| michael@0 | 23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| michael@0 | 24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| michael@0 | 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| michael@0 | 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 27 | */ |
| michael@0 | 28 | |
| michael@0 | 29 | #ifndef HRTFDatabase_h |
| michael@0 | 30 | #define HRTFDatabase_h |
| michael@0 | 31 | |
| michael@0 | 32 | #include "HRTFElevation.h" |
| michael@0 | 33 | #include "nsAutoRef.h" |
| michael@0 | 34 | #include "nsTArray.h" |
| michael@0 | 35 | #include "mozilla/MemoryReporting.h" |
| michael@0 | 36 | |
| michael@0 | 37 | namespace WebCore { |
| michael@0 | 38 | |
| michael@0 | 39 | class HRTFKernel; |
| michael@0 | 40 | |
| michael@0 | 41 | class HRTFDatabase { |
| michael@0 | 42 | public: |
| michael@0 | 43 | static nsReturnRef<HRTFDatabase> create(float sampleRate); |
| michael@0 | 44 | |
| michael@0 | 45 | // getKernelsFromAzimuthElevation() returns a left and right ear kernel, and an interpolated left and right frame delay for the given azimuth and elevation. |
| michael@0 | 46 | // azimuthBlend must be in the range 0 -> 1. |
| michael@0 | 47 | // Valid values for azimuthIndex are 0 -> HRTFElevation::NumberOfTotalAzimuths - 1 (corresponding to angles of 0 -> 360). |
| michael@0 | 48 | // Valid values for elevationAngle are MinElevation -> MaxElevation. |
| michael@0 | 49 | void getKernelsFromAzimuthElevation(double azimuthBlend, unsigned azimuthIndex, double elevationAngle, HRTFKernel* &kernelL, HRTFKernel* &kernelR, double& frameDelayL, double& frameDelayR); |
| michael@0 | 50 | |
| michael@0 | 51 | // Returns the number of different azimuth angles. |
| michael@0 | 52 | static unsigned numberOfAzimuths() { return HRTFElevation::NumberOfTotalAzimuths; } |
| michael@0 | 53 | |
| michael@0 | 54 | float sampleRate() const { return m_sampleRate; } |
| michael@0 | 55 | |
| michael@0 | 56 | // Number of elevations loaded from resource. |
| michael@0 | 57 | static const unsigned NumberOfRawElevations; |
| michael@0 | 58 | |
| michael@0 | 59 | size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const; |
| michael@0 | 60 | |
| michael@0 | 61 | private: |
| michael@0 | 62 | HRTFDatabase(const HRTFDatabase& other) MOZ_DELETE; |
| michael@0 | 63 | void operator=(const HRTFDatabase& other) MOZ_DELETE; |
| michael@0 | 64 | |
| michael@0 | 65 | explicit HRTFDatabase(float sampleRate); |
| michael@0 | 66 | |
| michael@0 | 67 | // Minimum and maximum elevation angles (inclusive) for a HRTFDatabase. |
| michael@0 | 68 | static const int MinElevation; |
| michael@0 | 69 | static const int MaxElevation; |
| michael@0 | 70 | static const unsigned RawElevationAngleSpacing; |
| michael@0 | 71 | |
| michael@0 | 72 | // Interpolates by this factor to get the total number of elevations from every elevation loaded from resource. |
| michael@0 | 73 | static const unsigned InterpolationFactor; |
| michael@0 | 74 | |
| michael@0 | 75 | // Total number of elevations after interpolation. |
| michael@0 | 76 | static const unsigned NumberOfTotalElevations; |
| michael@0 | 77 | |
| michael@0 | 78 | // Returns the index for the correct HRTFElevation given the elevation angle. |
| michael@0 | 79 | static unsigned indexFromElevationAngle(double); |
| michael@0 | 80 | |
| michael@0 | 81 | nsTArray<nsAutoRef<HRTFElevation> > m_elevations; |
| michael@0 | 82 | float m_sampleRate; |
| michael@0 | 83 | }; |
| michael@0 | 84 | |
| michael@0 | 85 | } // namespace WebCore |
| michael@0 | 86 | |
| michael@0 | 87 | template <> |
| michael@0 | 88 | class nsAutoRefTraits<WebCore::HRTFDatabase> : |
| michael@0 | 89 | public nsPointerRefTraits<WebCore::HRTFDatabase> { |
| michael@0 | 90 | public: |
| michael@0 | 91 | static void Release(WebCore::HRTFDatabase* ptr) { delete(ptr); } |
| michael@0 | 92 | }; |
| michael@0 | 93 | |
| michael@0 | 94 | #endif // HRTFDatabase_h |
