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comparison: content/media/directshow/DirectShowUtils.h
content/media/directshow/DirectShowUtils.h
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| 1 /* vim:set ts=2 sw=2 sts=2 et cindent: */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef _DirectShowUtils_h_ | |
| 7 #define _DirectShowUtils_h_ | |
| 8 | |
| 9 #include <stdint.h> | |
| 10 #include "dshow.h" | |
| 11 #include "DShowTools.h" | |
| 12 #include "prlog.h" | |
| 13 | |
| 14 namespace mozilla { | |
| 15 | |
| 16 // Win32 "Event" wrapper. Must be paired with a CriticalSection to create a | |
| 17 // Java-style "monitor". | |
| 18 class Signal { | |
| 19 public: | |
| 20 | |
| 21 Signal(CriticalSection* aLock) | |
| 22 : mLock(aLock) | |
| 23 { | |
| 24 CriticalSectionAutoEnter lock(*mLock); | |
| 25 mEvent = CreateEvent(nullptr, FALSE, FALSE, nullptr); | |
| 26 } | |
| 27 | |
| 28 ~Signal() { | |
| 29 CriticalSectionAutoEnter lock(*mLock); | |
| 30 CloseHandle(mEvent); | |
| 31 } | |
| 32 | |
| 33 // Lock must be held. | |
| 34 void Notify() { | |
| 35 SetEvent(mEvent); | |
| 36 } | |
| 37 | |
| 38 // Lock must be held. Check the wait condition before waiting! | |
| 39 HRESULT Wait() { | |
| 40 mLock->Leave(); | |
| 41 DWORD result = WaitForSingleObject(mEvent, INFINITE); | |
| 42 mLock->Enter(); | |
| 43 return result == WAIT_OBJECT_0 ? S_OK : E_FAIL; | |
| 44 } | |
| 45 | |
| 46 private: | |
| 47 CriticalSection* mLock; | |
| 48 HANDLE mEvent; | |
| 49 }; | |
| 50 | |
| 51 HRESULT | |
| 52 AddGraphToRunningObjectTable(IUnknown *aUnkGraph, DWORD *aOutRotRegister); | |
| 53 | |
| 54 void | |
| 55 RemoveGraphFromRunningObjectTable(DWORD aRotRegister); | |
| 56 | |
| 57 const char* | |
| 58 GetGraphNotifyString(long evCode); | |
| 59 | |
| 60 // Creates a filter and adds it to a graph. | |
| 61 HRESULT | |
| 62 CreateAndAddFilter(IGraphBuilder* aGraph, | |
| 63 REFGUID aFilterClsId, | |
| 64 LPCWSTR aFilterName, | |
| 65 IBaseFilter **aOutFilter); | |
| 66 | |
| 67 HRESULT | |
| 68 AddMP3DMOWrapperFilter(IGraphBuilder* aGraph, | |
| 69 IBaseFilter **aOutFilter); | |
| 70 | |
| 71 // Connects the output pin on aOutputFilter to an input pin on | |
| 72 // aInputFilter, in aGraph. | |
| 73 HRESULT | |
| 74 ConnectFilters(IGraphBuilder* aGraph, | |
| 75 IBaseFilter* aOutputFilter, | |
| 76 IBaseFilter* aInputFilter); | |
| 77 | |
| 78 HRESULT | |
| 79 MatchUnconnectedPin(IPin* aPin, | |
| 80 PIN_DIRECTION aPinDir, | |
| 81 bool *aOutMatches); | |
| 82 | |
| 83 // Converts from microseconds to DirectShow "Reference Time" | |
| 84 // (hundreds of nanoseconds). | |
| 85 inline int64_t | |
| 86 UsecsToRefTime(const int64_t aUsecs) | |
| 87 { | |
| 88 return aUsecs * 10; | |
| 89 } | |
| 90 | |
| 91 // Converts from DirectShow "Reference Time" (hundreds of nanoseconds) | |
| 92 // to microseconds. | |
| 93 inline int64_t | |
| 94 RefTimeToUsecs(const int64_t hRefTime) | |
| 95 { | |
| 96 return hRefTime / 10; | |
| 97 } | |
| 98 | |
| 99 // Converts from DirectShow "Reference Time" (hundreds of nanoseconds) | |
| 100 // to seconds. | |
| 101 inline double | |
| 102 RefTimeToSeconds(const REFERENCE_TIME aRefTime) | |
| 103 { | |
| 104 return double(aRefTime) / 10000000; | |
| 105 } | |
| 106 | |
| 107 | |
| 108 #if defined(PR_LOGGING) | |
| 109 const char* | |
| 110 GetDirectShowGuidName(const GUID& aGuid); | |
| 111 #endif | |
| 112 | |
| 113 } // namespace mozilla | |
| 114 | |
| 115 #endif |
