content/media/directshow/DirectShowUtils.h@97036ab72558 (annotated)
content/media/directshow/DirectShowUtils.h
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 | /* vim:set ts=2 sw=2 sts=2 et cindent: */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #ifndef _DirectShowUtils_h_ |
| michael@0 | 7 | #define _DirectShowUtils_h_ |
| michael@0 | 8 | |
| michael@0 | 9 | #include <stdint.h> |
| michael@0 | 10 | #include "dshow.h" |
| michael@0 | 11 | #include "DShowTools.h" |
| michael@0 | 12 | #include "prlog.h" |
| michael@0 | 13 | |
| michael@0 | 14 | namespace mozilla { |
| michael@0 | 15 | |
| michael@0 | 16 | // Win32 "Event" wrapper. Must be paired with a CriticalSection to create a |
| michael@0 | 17 | // Java-style "monitor". |
| michael@0 | 18 | class Signal { |
| michael@0 | 19 | public: |
| michael@0 | 20 | |
| michael@0 | 21 | Signal(CriticalSection* aLock) |
| michael@0 | 22 | : mLock(aLock) |
| michael@0 | 23 | { |
| michael@0 | 24 | CriticalSectionAutoEnter lock(*mLock); |
| michael@0 | 25 | mEvent = CreateEvent(nullptr, FALSE, FALSE, nullptr); |
| michael@0 | 26 | } |
| michael@0 | 27 | |
| michael@0 | 28 | ~Signal() { |
| michael@0 | 29 | CriticalSectionAutoEnter lock(*mLock); |
| michael@0 | 30 | CloseHandle(mEvent); |
| michael@0 | 31 | } |
| michael@0 | 32 | |
| michael@0 | 33 | // Lock must be held. |
| michael@0 | 34 | void Notify() { |
| michael@0 | 35 | SetEvent(mEvent); |
| michael@0 | 36 | } |
| michael@0 | 37 | |
| michael@0 | 38 | // Lock must be held. Check the wait condition before waiting! |
| michael@0 | 39 | HRESULT Wait() { |
| michael@0 | 40 | mLock->Leave(); |
| michael@0 | 41 | DWORD result = WaitForSingleObject(mEvent, INFINITE); |
| michael@0 | 42 | mLock->Enter(); |
| michael@0 | 43 | return result == WAIT_OBJECT_0 ? S_OK : E_FAIL; |
| michael@0 | 44 | } |
| michael@0 | 45 | |
| michael@0 | 46 | private: |
| michael@0 | 47 | CriticalSection* mLock; |
| michael@0 | 48 | HANDLE mEvent; |
| michael@0 | 49 | }; |
| michael@0 | 50 | |
| michael@0 | 51 | HRESULT |
| michael@0 | 52 | AddGraphToRunningObjectTable(IUnknown *aUnkGraph, DWORD *aOutRotRegister); |
| michael@0 | 53 | |
| michael@0 | 54 | void |
| michael@0 | 55 | RemoveGraphFromRunningObjectTable(DWORD aRotRegister); |
| michael@0 | 56 | |
| michael@0 | 57 | const char* |
| michael@0 | 58 | GetGraphNotifyString(long evCode); |
| michael@0 | 59 | |
| michael@0 | 60 | // Creates a filter and adds it to a graph. |
| michael@0 | 61 | HRESULT |
| michael@0 | 62 | CreateAndAddFilter(IGraphBuilder* aGraph, |
| michael@0 | 63 | REFGUID aFilterClsId, |
| michael@0 | 64 | LPCWSTR aFilterName, |
| michael@0 | 65 | IBaseFilter **aOutFilter); |
| michael@0 | 66 | |
| michael@0 | 67 | HRESULT |
| michael@0 | 68 | AddMP3DMOWrapperFilter(IGraphBuilder* aGraph, |
| michael@0 | 69 | IBaseFilter **aOutFilter); |
| michael@0 | 70 | |
| michael@0 | 71 | // Connects the output pin on aOutputFilter to an input pin on |
| michael@0 | 72 | // aInputFilter, in aGraph. |
| michael@0 | 73 | HRESULT |
| michael@0 | 74 | ConnectFilters(IGraphBuilder* aGraph, |
| michael@0 | 75 | IBaseFilter* aOutputFilter, |
| michael@0 | 76 | IBaseFilter* aInputFilter); |
| michael@0 | 77 | |
| michael@0 | 78 | HRESULT |
| michael@0 | 79 | MatchUnconnectedPin(IPin* aPin, |
| michael@0 | 80 | PIN_DIRECTION aPinDir, |
| michael@0 | 81 | bool *aOutMatches); |
| michael@0 | 82 | |
| michael@0 | 83 | // Converts from microseconds to DirectShow "Reference Time" |
| michael@0 | 84 | // (hundreds of nanoseconds). |
| michael@0 | 85 | inline int64_t |
| michael@0 | 86 | UsecsToRefTime(const int64_t aUsecs) |
| michael@0 | 87 | { |
| michael@0 | 88 | return aUsecs * 10; |
| michael@0 | 89 | } |
| michael@0 | 90 | |
| michael@0 | 91 | // Converts from DirectShow "Reference Time" (hundreds of nanoseconds) |
| michael@0 | 92 | // to microseconds. |
| michael@0 | 93 | inline int64_t |
| michael@0 | 94 | RefTimeToUsecs(const int64_t hRefTime) |
| michael@0 | 95 | { |
| michael@0 | 96 | return hRefTime / 10; |
| michael@0 | 97 | } |
| michael@0 | 98 | |
| michael@0 | 99 | // Converts from DirectShow "Reference Time" (hundreds of nanoseconds) |
| michael@0 | 100 | // to seconds. |
| michael@0 | 101 | inline double |
| michael@0 | 102 | RefTimeToSeconds(const REFERENCE_TIME aRefTime) |
| michael@0 | 103 | { |
| michael@0 | 104 | return double(aRefTime) / 10000000; |
| michael@0 | 105 | } |
| michael@0 | 106 | |
| michael@0 | 107 | |
| michael@0 | 108 | #if defined(PR_LOGGING) |
| michael@0 | 109 | const char* |
| michael@0 | 110 | GetDirectShowGuidName(const GUID& aGuid); |
| michael@0 | 111 | #endif |
| michael@0 | 112 | |
| michael@0 | 113 | } // namespace mozilla |
| michael@0 | 114 | |
| michael@0 | 115 | #endif |
