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00e98538aa
Differential Revision: https://phabricator.services.mozilla.com/D21106 --HG-- extra : rebase_source : ea3f51c2c11247114deccbc86e90fb02b8a97257
132 lines
4.0 KiB
C++
132 lines
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "PeriodicWave.h"
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#include "AudioContext.h"
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#include "mozilla/dom/PeriodicWaveBinding.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(PeriodicWave, mContext)
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(PeriodicWave, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(PeriodicWave, Release)
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PeriodicWave::PeriodicWave(AudioContext* aContext, const float* aRealData,
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const float* aImagData, const uint32_t aLength,
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const bool aDisableNormalization, ErrorResult& aRv)
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: mContext(aContext), mDisableNormalization(aDisableNormalization) {
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MOZ_ASSERT(aContext);
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MOZ_ASSERT((aRealData || aImagData) || aLength == 2);
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// Caller should have checked this and thrown.
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MOZ_ASSERT(aLength > 0);
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mCoefficients.mDuration = aLength;
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// Copy coefficient data.
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// The SharedBuffer and two arrays share a single allocation.
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RefPtr<SharedBuffer> buffer =
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SharedBuffer::Create(sizeof(float) * aLength * 2, fallible);
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if (!buffer) {
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aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
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return;
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}
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auto data = static_cast<float*>(buffer->Data());
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mCoefficients.mBuffer = std::move(buffer);
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if (!aRealData && !aImagData) {
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PodZero(data, aLength);
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mCoefficients.mChannelData.AppendElement(data);
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data += aLength;
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data[0] = 0.0f;
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data[1] = 1.0f;
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mCoefficients.mChannelData.AppendElement(data);
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} else {
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if (aRealData) {
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PodCopy(data, aRealData, aLength);
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} else {
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PodZero(data, aLength);
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}
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mCoefficients.mChannelData.AppendElement(data);
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data += aLength;
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if (aImagData) {
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PodCopy(data, aImagData, aLength);
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} else {
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PodZero(data, aLength);
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}
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mCoefficients.mChannelData.AppendElement(data);
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}
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mCoefficients.mVolume = 1.0f;
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mCoefficients.mBufferFormat = AUDIO_FORMAT_FLOAT32;
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}
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/* static */
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already_AddRefed<PeriodicWave> PeriodicWave::Constructor(
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const GlobalObject& aGlobal, AudioContext& aAudioContext,
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const PeriodicWaveOptions& aOptions, ErrorResult& aRv) {
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if (aOptions.mReal.WasPassed() && aOptions.mImag.WasPassed() &&
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aOptions.mReal.Value().Length() != aOptions.mImag.Value().Length()) {
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return nullptr;
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}
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uint32_t length = 0;
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if (aOptions.mReal.WasPassed()) {
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length = aOptions.mReal.Value().Length();
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} else if (aOptions.mImag.WasPassed()) {
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length = aOptions.mImag.Value().Length();
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} else {
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// If nothing has been passed, this PeriodicWave will be a sine wave: 2
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// elements for each array, the second imaginary component set to 1.0.
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length = 2;
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}
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if (length == 0) {
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return nullptr;
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}
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const float* realData =
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aOptions.mReal.WasPassed() ? aOptions.mReal.Value().Elements() : nullptr;
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const float* imagData =
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aOptions.mImag.WasPassed() ? aOptions.mImag.Value().Elements() : nullptr;
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RefPtr<PeriodicWave> wave =
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new PeriodicWave(&aAudioContext, realData, imagData, length,
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aOptions.mDisableNormalization, aRv);
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if (aRv.Failed()) {
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return nullptr;
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}
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return wave.forget();
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}
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size_t PeriodicWave::SizeOfExcludingThisIfNotShared(
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MallocSizeOf aMallocSizeOf) const {
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// Not owned:
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// - mContext
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size_t amount = 0;
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amount += mCoefficients.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
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return amount;
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}
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size_t PeriodicWave::SizeOfIncludingThisIfNotShared(
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MallocSizeOf aMallocSizeOf) const {
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return aMallocSizeOf(this) + SizeOfExcludingThisIfNotShared(aMallocSizeOf);
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}
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JSObject* PeriodicWave::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return PeriodicWave_Binding::Wrap(aCx, this, aGivenProto);
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}
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} // namespace dom
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} // namespace mozilla
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