From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- dom/media/webaudio/PanningUtils.h | 62 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 dom/media/webaudio/PanningUtils.h (limited to 'dom/media/webaudio/PanningUtils.h') diff --git a/dom/media/webaudio/PanningUtils.h b/dom/media/webaudio/PanningUtils.h new file mode 100644 index 0000000000..eef8ae78c9 --- /dev/null +++ b/dom/media/webaudio/PanningUtils.h @@ -0,0 +1,62 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=2 sw=2 sts=2 et cindent: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef PANNING_UTILS_H +#define PANNING_UTILS_H + +#include "AudioSegment.h" +#include "AudioNodeEngine.h" + +namespace mozilla::dom { + +template +void GainMonoToStereo(const AudioBlock& aInput, AudioBlock* aOutput, T aGainL, + T aGainR) { + float* outputL = aOutput->ChannelFloatsForWrite(0); + float* outputR = aOutput->ChannelFloatsForWrite(1); + const float* input = static_cast(aInput.mChannelData[0]); + + MOZ_ASSERT(aInput.ChannelCount() == 1); + MOZ_ASSERT(aOutput->ChannelCount() == 2); + + AudioBlockPanMonoToStereo(input, aGainL, aGainR, outputL, outputR); +} + +// T can be float or an array of float, and U can be bool or an array of bool, +// depending if the value of the parameters are constant for this block. +template +void GainStereoToStereo(const AudioBlock& aInput, AudioBlock* aOutput, T aGainL, + T aGainR, U aOnLeft) { + float* outputL = aOutput->ChannelFloatsForWrite(0); + float* outputR = aOutput->ChannelFloatsForWrite(1); + const float* inputL = static_cast(aInput.mChannelData[0]); + const float* inputR = static_cast(aInput.mChannelData[1]); + + MOZ_ASSERT(aInput.ChannelCount() == 2); + MOZ_ASSERT(aOutput->ChannelCount() == 2); + + AudioBlockPanStereoToStereo(inputL, inputR, aGainL, aGainR, aOnLeft, outputL, + outputR); +} + +// T can be float or an array of float, and U can be bool or an array of bool, +// depending if the value of the parameters are constant for this block. +template +void ApplyStereoPanning(const AudioBlock& aInput, AudioBlock* aOutput, T aGainL, + T aGainR, U aOnLeft) { + aOutput->AllocateChannels(2); + + if (aInput.ChannelCount() == 1) { + GainMonoToStereo(aInput, aOutput, aGainL, aGainR); + } else { + GainStereoToStereo(aInput, aOutput, aGainL, aGainR, aOnLeft); + } + aOutput->mVolume = aInput.mVolume; +} + +} // namespace mozilla::dom + +#endif // PANNING_UTILS_H -- cgit v1.2.3