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cb8419331d
MozReview-Commit-ID: 3gIU7MCddWG --HG-- extra : rebase_source : f894d4dcefe229cd8b3aa170c9dd617b4a2b6314
63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#ifndef AllocationHandle_h
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#define AllocationHandle_h
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#include <cstdint>
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#include <limits>
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#include "MediaEnginePrefs.h"
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#include "MediaManager.h"
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#include "MediaTrackConstraints.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/ipc/PBackgroundSharedTypes.h"
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#include "nsString.h"
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namespace mozilla {
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/**
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* AllocationHandle helps keep track of metadata for allocations of shared
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* MediaEngineSources. That is, for MediaEngineSources that support more than
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* one concurrent allocation.
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*/
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class AllocationHandle
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{
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~AllocationHandle() = default;
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public:
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static uint64_t GetUniqueId()
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{
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static uint64_t sId = 0;
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MOZ_ASSERT(MediaManager::GetIfExists());
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MOZ_ASSERT(MediaManager::GetIfExists()->IsInMediaThread());
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MOZ_RELEASE_ASSERT(sId < std::numeric_limits<decltype(sId)>::max());
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return sId++;
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}
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(AllocationHandle);
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AllocationHandle() = delete;
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AllocationHandle(const dom::MediaTrackConstraints& aConstraints,
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const ipc::PrincipalInfo& aPrincipalInfo,
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const nsString& aDeviceId)
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: mId(GetUniqueId())
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, mDeviceId(aDeviceId)
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, mPrincipalInfo(aPrincipalInfo)
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, mConstraints(aConstraints)
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{}
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const uint64_t mId;
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const nsString mDeviceId;
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const ipc::PrincipalInfo mPrincipalInfo;
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NormalizedConstraints mConstraints;
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};
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} // namespace mozilla
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#endif // AllocationHandle_h
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