1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/PeriodicWave.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,68 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "PeriodicWave.h"
1.11 +#include "AudioContext.h"
1.12 +#include "mozilla/dom/PeriodicWaveBinding.h"
1.13 +
1.14 +namespace mozilla {
1.15 +namespace dom {
1.16 +
1.17 +NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_1(PeriodicWave, mContext)
1.18 +
1.19 +NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(PeriodicWave, AddRef)
1.20 +NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(PeriodicWave, Release)
1.21 +
1.22 +PeriodicWave::PeriodicWave(AudioContext* aContext,
1.23 + const float* aRealData,
1.24 + const float* aImagData,
1.25 + const uint32_t aLength,
1.26 + ErrorResult& aRv)
1.27 + : mContext(aContext)
1.28 +{
1.29 + MOZ_ASSERT(aContext);
1.30 + SetIsDOMBinding();
1.31 +
1.32 + // Caller should have checked this and thrown.
1.33 + MOZ_ASSERT(aLength > 0);
1.34 + MOZ_ASSERT(aLength <= 4096);
1.35 + mLength = aLength;
1.36 +
1.37 + // Copy coefficient data. The two arrays share an allocation.
1.38 + mCoefficients = new ThreadSharedFloatArrayBufferList(2);
1.39 + float* buffer = static_cast<float*>(malloc(aLength*sizeof(float)*2));
1.40 + if (buffer == nullptr) {
1.41 + aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
1.42 + return;
1.43 + }
1.44 + PodCopy(buffer, aRealData, aLength);
1.45 + mCoefficients->SetData(0, buffer, buffer);
1.46 + PodCopy(buffer+aLength, aImagData, aLength);
1.47 + mCoefficients->SetData(1, nullptr, buffer+aLength);
1.48 +}
1.49 +
1.50 +size_t
1.51 +PeriodicWave::SizeOfExcludingThisIfNotShared(MallocSizeOf aMallocSizeOf) const
1.52 +{
1.53 + // Not owned:
1.54 + // - mContext
1.55 + size_t amount = 0;
1.56 + if (!mCoefficients->IsShared()) {
1.57 + amount += mCoefficients->SizeOfIncludingThis(aMallocSizeOf);
1.58 + }
1.59 +
1.60 + return amount;
1.61 +}
1.62 +
1.63 +JSObject*
1.64 +PeriodicWave::WrapObject(JSContext* aCx)
1.65 +{
1.66 + return PeriodicWaveBinding::Wrap(aCx, this);
1.67 +}
1.68 +
1.69 +} // namespace dom
1.70 +} // namespace mozilla
1.71 +
