content/media/webaudio/PeriodicWave.cpp@97036ab72558 (annotated)
content/media/webaudio/PeriodicWave.cpp
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim:set ts=2 sw=2 sts=2 et cindent: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #include "PeriodicWave.h" |
| michael@0 | 8 | #include "AudioContext.h" |
| michael@0 | 9 | #include "mozilla/dom/PeriodicWaveBinding.h" |
| michael@0 | 10 | |
| michael@0 | 11 | namespace mozilla { |
| michael@0 | 12 | namespace dom { |
| michael@0 | 13 | |
| michael@0 | 14 | NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_1(PeriodicWave, mContext) |
| michael@0 | 15 | |
| michael@0 | 16 | NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(PeriodicWave, AddRef) |
| michael@0 | 17 | NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(PeriodicWave, Release) |
| michael@0 | 18 | |
| michael@0 | 19 | PeriodicWave::PeriodicWave(AudioContext* aContext, |
| michael@0 | 20 | const float* aRealData, |
| michael@0 | 21 | const float* aImagData, |
| michael@0 | 22 | const uint32_t aLength, |
| michael@0 | 23 | ErrorResult& aRv) |
| michael@0 | 24 | : mContext(aContext) |
| michael@0 | 25 | { |
| michael@0 | 26 | MOZ_ASSERT(aContext); |
| michael@0 | 27 | SetIsDOMBinding(); |
| michael@0 | 28 | |
| michael@0 | 29 | // Caller should have checked this and thrown. |
| michael@0 | 30 | MOZ_ASSERT(aLength > 0); |
| michael@0 | 31 | MOZ_ASSERT(aLength <= 4096); |
| michael@0 | 32 | mLength = aLength; |
| michael@0 | 33 | |
| michael@0 | 34 | // Copy coefficient data. The two arrays share an allocation. |
| michael@0 | 35 | mCoefficients = new ThreadSharedFloatArrayBufferList(2); |
| michael@0 | 36 | float* buffer = static_cast<float*>(malloc(aLength*sizeof(float)*2)); |
| michael@0 | 37 | if (buffer == nullptr) { |
| michael@0 | 38 | aRv.Throw(NS_ERROR_OUT_OF_MEMORY); |
| michael@0 | 39 | return; |
| michael@0 | 40 | } |
| michael@0 | 41 | PodCopy(buffer, aRealData, aLength); |
| michael@0 | 42 | mCoefficients->SetData(0, buffer, buffer); |
| michael@0 | 43 | PodCopy(buffer+aLength, aImagData, aLength); |
| michael@0 | 44 | mCoefficients->SetData(1, nullptr, buffer+aLength); |
| michael@0 | 45 | } |
| michael@0 | 46 | |
| michael@0 | 47 | size_t |
| michael@0 | 48 | PeriodicWave::SizeOfExcludingThisIfNotShared(MallocSizeOf aMallocSizeOf) const |
| michael@0 | 49 | { |
| michael@0 | 50 | // Not owned: |
| michael@0 | 51 | // - mContext |
| michael@0 | 52 | size_t amount = 0; |
| michael@0 | 53 | if (!mCoefficients->IsShared()) { |
| michael@0 | 54 | amount += mCoefficients->SizeOfIncludingThis(aMallocSizeOf); |
| michael@0 | 55 | } |
| michael@0 | 56 | |
| michael@0 | 57 | return amount; |
| michael@0 | 58 | } |
| michael@0 | 59 | |
| michael@0 | 60 | JSObject* |
| michael@0 | 61 | PeriodicWave::WrapObject(JSContext* aCx) |
| michael@0 | 62 | { |
| michael@0 | 63 | return PeriodicWaveBinding::Wrap(aCx, this); |
| michael@0 | 64 | } |
| michael@0 | 65 | |
| michael@0 | 66 | } // namespace dom |
| michael@0 | 67 | } // namespace mozilla |
| michael@0 | 68 |
