michael@0: /* vim:set ts=2 sw=2 sts=2 et cindent: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef _DirectShowUtils_h_
michael@0: #define _DirectShowUtils_h_
michael@0: 
michael@0: #include <stdint.h>
michael@0: #include "dshow.h"
michael@0: #include "DShowTools.h"
michael@0: #include "prlog.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: // Win32 "Event" wrapper. Must be paired with a CriticalSection to create a
michael@0: // Java-style "monitor".
michael@0: class Signal {
michael@0: public:
michael@0: 
michael@0:   Signal(CriticalSection* aLock)
michael@0:     : mLock(aLock)
michael@0:   {
michael@0:     CriticalSectionAutoEnter lock(*mLock);
michael@0:     mEvent = CreateEvent(nullptr, FALSE, FALSE, nullptr);
michael@0:   }
michael@0: 
michael@0:   ~Signal() {
michael@0:     CriticalSectionAutoEnter lock(*mLock);
michael@0:     CloseHandle(mEvent);
michael@0:   }
michael@0: 
michael@0:   // Lock must be held.
michael@0:   void Notify() {
michael@0:     SetEvent(mEvent);
michael@0:   }
michael@0: 
michael@0:   // Lock must be held. Check the wait condition before waiting!
michael@0:   HRESULT Wait() {
michael@0:     mLock->Leave();
michael@0:     DWORD result = WaitForSingleObject(mEvent, INFINITE);
michael@0:     mLock->Enter();
michael@0:     return result == WAIT_OBJECT_0 ? S_OK : E_FAIL;
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   CriticalSection* mLock;
michael@0:   HANDLE mEvent;
michael@0: };
michael@0: 
michael@0: HRESULT
michael@0: AddGraphToRunningObjectTable(IUnknown *aUnkGraph, DWORD *aOutRotRegister);
michael@0: 
michael@0: void
michael@0: RemoveGraphFromRunningObjectTable(DWORD aRotRegister);
michael@0: 
michael@0: const char*
michael@0: GetGraphNotifyString(long evCode);
michael@0: 
michael@0: // Creates a filter and adds it to a graph.
michael@0: HRESULT
michael@0: CreateAndAddFilter(IGraphBuilder* aGraph,
michael@0:                    REFGUID aFilterClsId,
michael@0:                    LPCWSTR aFilterName,
michael@0:                    IBaseFilter **aOutFilter);
michael@0: 
michael@0: HRESULT
michael@0: AddMP3DMOWrapperFilter(IGraphBuilder* aGraph,
michael@0:                        IBaseFilter **aOutFilter);
michael@0: 
michael@0: // Connects the output pin on aOutputFilter to an input pin on
michael@0: // aInputFilter, in aGraph.
michael@0: HRESULT
michael@0: ConnectFilters(IGraphBuilder* aGraph,
michael@0:                IBaseFilter* aOutputFilter,
michael@0:                IBaseFilter* aInputFilter);
michael@0: 
michael@0: HRESULT
michael@0: MatchUnconnectedPin(IPin* aPin,
michael@0:                     PIN_DIRECTION aPinDir,
michael@0:                     bool *aOutMatches);
michael@0: 
michael@0: // Converts from microseconds to DirectShow "Reference Time"
michael@0: // (hundreds of nanoseconds).
michael@0: inline int64_t
michael@0: UsecsToRefTime(const int64_t aUsecs)
michael@0: {
michael@0:   return aUsecs * 10;
michael@0: }
michael@0: 
michael@0: // Converts from DirectShow "Reference Time" (hundreds of nanoseconds)
michael@0: // to microseconds.
michael@0: inline int64_t
michael@0: RefTimeToUsecs(const int64_t hRefTime)
michael@0: {
michael@0:   return hRefTime / 10;
michael@0: }
michael@0: 
michael@0: // Converts from DirectShow "Reference Time" (hundreds of nanoseconds)
michael@0: // to seconds.
michael@0: inline double
michael@0: RefTimeToSeconds(const REFERENCE_TIME aRefTime)
michael@0: {
michael@0:   return double(aRefTime) / 10000000;
michael@0: }
michael@0: 
michael@0: 
michael@0: #if defined(PR_LOGGING)
michael@0: const char*
michael@0: GetDirectShowGuidName(const GUID& aGuid);
michael@0: #endif
michael@0: 
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif