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/* -*- 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
#include "PeriodicWave.h"
#include "AudioContext.h"
#include "mozilla/dom/PeriodicWaveBinding.h"
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(PeriodicWave, mContext)
PeriodicWave::PeriodicWave(AudioContext* aContext, const float* aRealData,
const uint32_t aRealSize, const float* aImagData,
const uint32_t aImagSize,
const bool aDisableNormalization, ErrorResult& aRv)
: mContext(aContext), mDisableNormalization(aDisableNormalization) {
if (aRealData && aImagData && aRealSize != aImagSize) {
aRv.ThrowIndexSizeError("\"real\" and \"imag\" are different in length");
return;
}
uint32_t length = 0;
if (aRealData) {
length = aRealSize;
} else if (aImagData) {
length = aImagSize;
} else {
// If nothing has been passed, this PeriodicWave will be a sine wave: 2
// elements for each array, the second imaginary component set to 1.0.
length = 2;
}
if (length < 2) {
aRv.ThrowIndexSizeError(
"\"real\" and \"imag\" must have a length of "
"at least 2");
return;
}
MOZ_ASSERT(aContext);
MOZ_ASSERT((aRealData || aImagData) || length == 2);
// Caller should have checked this and thrown.
MOZ_ASSERT(length >= 2);
mCoefficients.mDuration = length;
// Copy coefficient data.
// The SharedBuffer and two arrays share a single allocation.
CheckedInt<size_t> bufferSize(sizeof(float));
bufferSize *= length;
bufferSize *= 2;
RefPtr<SharedBuffer> buffer = SharedBuffer::Create(bufferSize, fallible);
if (!buffer) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
auto data = static_cast<float*>(buffer->Data());
mCoefficients.mBuffer = std::move(buffer);
if (!aRealData && !aImagData) {
PodZero(data, length);
mCoefficients.mChannelData.AppendElement(data);
data += length;
data[0] = 0.0f;
data[1] = 1.0f;
mCoefficients.mChannelData.AppendElement(data);
} else {
if (aRealData) {
PodCopy(data, aRealData, length);
} else {
PodZero(data, length);
}
mCoefficients.mChannelData.AppendElement(data);
data += length;
if (aImagData) {
PodCopy(data, aImagData, length);
} else {
PodZero(data, length);
}
mCoefficients.mChannelData.AppendElement(data);
}
mCoefficients.mVolume = 1.0f;
mCoefficients.mBufferFormat = AUDIO_FORMAT_FLOAT32;
}
/* static */
already_AddRefed<PeriodicWave> PeriodicWave::Constructor(
const GlobalObject& aGlobal, AudioContext& aAudioContext,
const PeriodicWaveOptions& aOptions, ErrorResult& aRv) {
const float* realData;
const float* imagData;
uint32_t realSize;
uint32_t imagSize;
if (aOptions.mReal.WasPassed()) {
realData = aOptions.mReal.Value().Elements();
realSize = aOptions.mReal.Value().Length();
} else {
realData = nullptr;
realSize = 0;
}
if (aOptions.mImag.WasPassed()) {
imagData = aOptions.mImag.Value().Elements();
imagSize = aOptions.mImag.Value().Length();
} else {
imagData = nullptr;
imagSize = 0;
}
RefPtr<PeriodicWave> wave =
new PeriodicWave(&aAudioContext, realData, realSize, imagData, imagSize,
aOptions.mDisableNormalization, aRv);
if (aRv.Failed()) {
return nullptr;
}
return wave.forget();
}
size_t PeriodicWave::SizeOfExcludingThisIfNotShared(
MallocSizeOf aMallocSizeOf) const {
// Not owned:
// - mContext
size_t amount = 0;
amount += mCoefficients.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
return amount;
}
size_t PeriodicWave::SizeOfIncludingThisIfNotShared(
MallocSizeOf aMallocSizeOf) const {
return aMallocSizeOf(this) + SizeOfExcludingThisIfNotShared(aMallocSizeOf);
}
JSObject* PeriodicWave::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return PeriodicWave_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace mozilla::dom