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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /dom/media/webaudio/blink/HRTFDatabase.cpp | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/media/webaudio/blink/HRTFDatabase.cpp')
-rw-r--r-- | dom/media/webaudio/blink/HRTFDatabase.cpp | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/dom/media/webaudio/blink/HRTFDatabase.cpp b/dom/media/webaudio/blink/HRTFDatabase.cpp new file mode 100644 index 0000000000..54be5ea958 --- /dev/null +++ b/dom/media/webaudio/blink/HRTFDatabase.cpp @@ -0,0 +1,135 @@ +/* + * Copyright (C) 2010 Google Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of + * its contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "HRTFDatabase.h" + +#include "HRTFElevation.h" + +namespace WebCore { + +const int HRTFDatabase::MinElevation = -45; +const int HRTFDatabase::MaxElevation = 90; +const unsigned HRTFDatabase::RawElevationAngleSpacing = 15; +const unsigned HRTFDatabase::NumberOfRawElevations = + 10; // -45 -> +90 (each 15 degrees) +const unsigned HRTFDatabase::InterpolationFactor = 1; +const unsigned HRTFDatabase::NumberOfTotalElevations = + NumberOfRawElevations * InterpolationFactor; + +nsReturnRef<HRTFDatabase> HRTFDatabase::create(float sampleRate) { + return nsReturnRef<HRTFDatabase>(new HRTFDatabase(sampleRate)); +} + +HRTFDatabase::HRTFDatabase(float sampleRate) : m_sampleRate(sampleRate) { + m_elevations.SetLength(NumberOfTotalElevations); + + unsigned elevationIndex = 0; + for (int elevation = MinElevation; elevation <= MaxElevation; + elevation += RawElevationAngleSpacing) { + nsAutoRef<HRTFElevation> hrtfElevation( + HRTFElevation::createBuiltin(elevation, sampleRate)); + MOZ_ASSERT(hrtfElevation.get()); + if (!hrtfElevation.get()) return; + + m_elevations[elevationIndex] = hrtfElevation.out(); + elevationIndex += InterpolationFactor; + } + + // Now, go back and interpolate elevations. + if (InterpolationFactor > 1) { + for (unsigned i = 0; i < NumberOfTotalElevations; + i += InterpolationFactor) { + unsigned j = (i + InterpolationFactor); + if (j >= NumberOfTotalElevations) + j = i; // for last elevation interpolate with itself + + // Create the interpolated convolution kernels and delays. + for (unsigned jj = 1; jj < InterpolationFactor; ++jj) { + float x = + static_cast<float>(jj) / static_cast<float>(InterpolationFactor); + m_elevations[i + jj] = HRTFElevation::createByInterpolatingSlices( + m_elevations[i].get(), m_elevations[j].get(), x, sampleRate); + MOZ_ASSERT(m_elevations[i + jj].get()); + } + } + } +} + +size_t HRTFDatabase::sizeOfIncludingThis( + mozilla::MallocSizeOf aMallocSizeOf) const { + size_t amount = aMallocSizeOf(this); + amount += m_elevations.ShallowSizeOfExcludingThis(aMallocSizeOf); + for (size_t i = 0; i < m_elevations.Length(); i++) { + amount += m_elevations[i]->sizeOfIncludingThis(aMallocSizeOf); + } + + return amount; +} + +void HRTFDatabase::getKernelsFromAzimuthElevation( + double azimuthBlend, unsigned azimuthIndex, double elevationAngle, + HRTFKernel*& kernelL, HRTFKernel*& kernelR, double& frameDelayL, + double& frameDelayR) { + unsigned elevationIndex = indexFromElevationAngle(elevationAngle); + MOZ_ASSERT(elevationIndex < m_elevations.Length() && + m_elevations.Length() > 0); + + if (!m_elevations.Length()) { + kernelL = 0; + kernelR = 0; + return; + } + + if (elevationIndex > m_elevations.Length() - 1) + elevationIndex = m_elevations.Length() - 1; + + HRTFElevation* hrtfElevation = m_elevations[elevationIndex].get(); + MOZ_ASSERT(hrtfElevation); + if (!hrtfElevation) { + kernelL = 0; + kernelR = 0; + return; + } + + hrtfElevation->getKernelsFromAzimuth(azimuthBlend, azimuthIndex, kernelL, + kernelR, frameDelayL, frameDelayR); +} + +unsigned HRTFDatabase::indexFromElevationAngle(double elevationAngle) { + // Clamp to allowed range. + elevationAngle = + mozilla::clamped(elevationAngle, static_cast<double>(MinElevation), + static_cast<double>(MaxElevation)); + + unsigned elevationIndex = + static_cast<int>(InterpolationFactor * (elevationAngle - MinElevation) / + RawElevationAngleSpacing); + return elevationIndex; +} + +} // namespace WebCore |