The Tor Browser / file comparison
comparison: content/media/webaudio/blink/HRTFElevation.h
content/media/webaudio/blink/HRTFElevation.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:828413008557 |
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| 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 HRTFElevation_h | |
| 30 #define HRTFElevation_h | |
| 31 | |
| 32 #include "HRTFKernel.h" | |
| 33 #include "nsAutoRef.h" | |
| 34 #include "mozilla/MemoryReporting.h" | |
| 35 | |
| 36 struct SpeexResamplerState_; | |
| 37 typedef struct SpeexResamplerState_ SpeexResamplerState; | |
| 38 | |
| 39 namespace WebCore { | |
| 40 | |
| 41 // HRTFElevation contains all of the HRTFKernels (one left ear and one right ear per azimuth angle) for a particular elevation. | |
| 42 | |
| 43 class HRTFElevation { | |
| 44 public: | |
| 45 // Loads and returns an HRTFElevation with the given HRTF database subject name and elevation from browser (or WebKit.framework) resources. | |
| 46 // Normally, there will only be a single HRTF database set, but this API supports the possibility of multiple ones with different names. | |
| 47 // Interpolated azimuths will be generated based on InterpolationFactor. | |
| 48 // Valid values for elevation are -45 -> +90 in 15 degree increments. | |
| 49 static nsReturnRef<HRTFElevation> createBuiltin(int elevation, float sampleRate); | |
| 50 | |
| 51 // Given two HRTFElevations, and an interpolation factor x: 0 -> 1, returns an interpolated HRTFElevation. | |
| 52 static nsReturnRef<HRTFElevation> createByInterpolatingSlices(HRTFElevation* hrtfElevation1, HRTFElevation* hrtfElevation2, float x, float sampleRate); | |
| 53 | |
| 54 double elevationAngle() const { return m_elevationAngle; } | |
| 55 unsigned numberOfAzimuths() const { return NumberOfTotalAzimuths; } | |
| 56 float sampleRate() const { return m_sampleRate; } | |
| 57 | |
| 58 // Returns the left and right kernels for the given azimuth index. | |
| 59 // The interpolated delays based on azimuthBlend: 0 -> 1 are returned in frameDelayL and frameDelayR. | |
| 60 void getKernelsFromAzimuth(double azimuthBlend, unsigned azimuthIndex, HRTFKernel* &kernelL, HRTFKernel* &kernelR, double& frameDelayL, double& frameDelayR); | |
| 61 | |
| 62 // Total number of azimuths after interpolation. | |
| 63 static const unsigned NumberOfTotalAzimuths; | |
| 64 | |
| 65 static size_t fftSizeForSampleRate(float sampleRate); | |
| 66 | |
| 67 size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const; | |
| 68 | |
| 69 private: | |
| 70 HRTFElevation(const HRTFElevation& other) MOZ_DELETE; | |
| 71 void operator=(const HRTFElevation& other) MOZ_DELETE; | |
| 72 | |
| 73 HRTFElevation(HRTFKernelList *kernelListL, int elevation, float sampleRate) | |
| 74 : m_elevationAngle(elevation) | |
| 75 , m_sampleRate(sampleRate) | |
| 76 { | |
| 77 m_kernelListL.SwapElements(*kernelListL); | |
| 78 } | |
| 79 | |
| 80 // Returns the list of left ear HRTFKernels for all the azimuths going from 0 to 360 degrees. | |
| 81 const HRTFKernelList& kernelListL() { return m_kernelListL; } | |
| 82 | |
| 83 // Given a specific azimuth and elevation angle, returns the left HRTFKernel. | |
| 84 // Values for azimuth must be multiples of 15 in 0 -> 345, | |
| 85 // but not all azimuths are available for elevations > +45. | |
| 86 // Valid values for elevation are -45 -> +90 in 15 degree increments. | |
| 87 static nsReturnRef<HRTFKernel> calculateKernelForAzimuthElevation(int azimuth, int elevation, SpeexResamplerState* resampler, float sampleRate); | |
| 88 | |
| 89 HRTFKernelList m_kernelListL; | |
| 90 double m_elevationAngle; | |
| 91 float m_sampleRate; | |
| 92 }; | |
| 93 | |
| 94 } // namespace WebCore | |
| 95 | |
| 96 template <> | |
| 97 class nsAutoRefTraits<WebCore::HRTFElevation> : | |
| 98 public nsPointerRefTraits<WebCore::HRTFElevation> { | |
| 99 public: | |
| 100 static void Release(WebCore::HRTFElevation* ptr) { delete(ptr); } | |
| 101 }; | |
| 102 | |
| 103 #endif // HRTFElevation_h |
