зеркало из https://github.com/mozilla/gecko-dev.git
126 строки
3.6 KiB
C++
126 строки
3.6 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,
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const float* aRealData,
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const float* aImagData,
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const uint32_t aLength,
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const bool aDisableNormalization,
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ErrorResult& aRv)
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: mContext(aContext)
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, mDisableNormalization(aDisableNormalization)
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{
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MOZ_ASSERT(aContext);
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MOZ_ASSERT(aRealData || aImagData);
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// Caller should have checked this and thrown.
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MOZ_ASSERT(aLength > 0);
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mLength = aLength;
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// Copy coefficient data. The two arrays share an allocation.
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mCoefficients = new ThreadSharedFloatArrayBufferList(2);
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float* buffer = static_cast<float*>(malloc(aLength*sizeof(float)*2));
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if (buffer == nullptr) {
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aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
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return;
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}
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if (aRealData) {
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PodCopy(buffer, aRealData, aLength);
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} else {
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PodZero(buffer, aLength);
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}
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mCoefficients->SetData(0, buffer, free, buffer);
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if (aImagData) {
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PodCopy(buffer+aLength, aImagData, aLength);
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} else {
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PodZero(buffer+aLength, aLength);
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}
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mCoefficients->SetData(1, nullptr, free, buffer+aLength);
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}
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/* static */ already_AddRefed<PeriodicWave>
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PeriodicWave::Constructor(const GlobalObject& aGlobal,
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AudioContext& aAudioContext,
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const PeriodicWaveOptions& aOptions,
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ErrorResult& aRv)
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{
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if (!aOptions.mReal.WasPassed() && !aOptions.mImag.WasPassed()) {
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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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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 =
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aOptions.mReal.WasPassed() ? aOptions.mReal.Value().Length() : aOptions.mImag.Value().Length();
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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
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PeriodicWave::SizeOfExcludingThisIfNotShared(MallocSizeOf aMallocSizeOf) const
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{
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// Not owned:
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// - mContext
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size_t amount = 0;
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if (!mCoefficients->IsShared()) {
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amount += mCoefficients->SizeOfIncludingThis(aMallocSizeOf);
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}
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return amount;
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}
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size_t
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PeriodicWave::SizeOfIncludingThisIfNotShared(MallocSizeOf aMallocSizeOf) const
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{
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return aMallocSizeOf(this) + SizeOfExcludingThisIfNotShared(aMallocSizeOf);
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}
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JSObject*
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PeriodicWave::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return PeriodicWaveBinding::Wrap(aCx, this, aGivenProto);
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}
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} // namespace dom
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} // namespace mozilla
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