The Tor Browser / file comparison
comparison: content/media/webaudio/blink/HRTFDatabase.h
content/media/webaudio/blink/HRTFDatabase.h
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
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| -1:000000000000 | 0:a3b53d46b17f |
|---|---|
| 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 "nsAutoRef.h" | |
| 34 #include "nsTArray.h" | |
| 35 #include "mozilla/MemoryReporting.h" | |
| 36 | |
| 37 namespace WebCore { | |
| 38 | |
| 39 class HRTFKernel; | |
| 40 | |
| 41 class HRTFDatabase { | |
| 42 public: | |
| 43 static nsReturnRef<HRTFDatabase> create(float sampleRate); | |
| 44 | |
| 45 // getKernelsFromAzimuthElevation() returns a left and right ear kernel, and an interpolated left and right frame delay for the given azimuth and elevation. | |
| 46 // azimuthBlend must be in the range 0 -> 1. | |
| 47 // Valid values for azimuthIndex are 0 -> HRTFElevation::NumberOfTotalAzimuths - 1 (corresponding to angles of 0 -> 360). | |
| 48 // Valid values for elevationAngle are MinElevation -> MaxElevation. | |
| 49 void getKernelsFromAzimuthElevation(double azimuthBlend, unsigned azimuthIndex, double elevationAngle, HRTFKernel* &kernelL, HRTFKernel* &kernelR, double& frameDelayL, double& frameDelayR); | |
| 50 | |
| 51 // Returns the number of different azimuth angles. | |
| 52 static unsigned numberOfAzimuths() { return HRTFElevation::NumberOfTotalAzimuths; } | |
| 53 | |
| 54 float sampleRate() const { return m_sampleRate; } | |
| 55 | |
| 56 // Number of elevations loaded from resource. | |
| 57 static const unsigned NumberOfRawElevations; | |
| 58 | |
| 59 size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const; | |
| 60 | |
| 61 private: | |
| 62 HRTFDatabase(const HRTFDatabase& other) MOZ_DELETE; | |
| 63 void operator=(const HRTFDatabase& other) MOZ_DELETE; | |
| 64 | |
| 65 explicit HRTFDatabase(float sampleRate); | |
| 66 | |
| 67 // Minimum and maximum elevation angles (inclusive) for a HRTFDatabase. | |
| 68 static const int MinElevation; | |
| 69 static const int MaxElevation; | |
| 70 static const unsigned RawElevationAngleSpacing; | |
| 71 | |
| 72 // Interpolates by this factor to get the total number of elevations from every elevation loaded from resource. | |
| 73 static const unsigned InterpolationFactor; | |
| 74 | |
| 75 // Total number of elevations after interpolation. | |
| 76 static const unsigned NumberOfTotalElevations; | |
| 77 | |
| 78 // Returns the index for the correct HRTFElevation given the elevation angle. | |
| 79 static unsigned indexFromElevationAngle(double); | |
| 80 | |
| 81 nsTArray<nsAutoRef<HRTFElevation> > m_elevations; | |
| 82 float m_sampleRate; | |
| 83 }; | |
| 84 | |
| 85 } // namespace WebCore | |
| 86 | |
| 87 template <> | |
| 88 class nsAutoRefTraits<WebCore::HRTFDatabase> : | |
| 89 public nsPointerRefTraits<WebCore::HRTFDatabase> { | |
| 90 public: | |
| 91 static void Release(WebCore::HRTFDatabase* ptr) { delete(ptr); } | |
| 92 }; | |
| 93 | |
| 94 #endif // HRTFDatabase_h |
