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116 lines
2.6 KiB
C++
116 lines
2.6 KiB
C++
/* vim:set ts=2 sw=2 sts=2 et cindent: */
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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 _DirectShowUtils_h_
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#define _DirectShowUtils_h_
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#include <stdint.h>
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#include "dshow.h"
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#include "DShowTools.h"
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#include "prlog.h"
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namespace mozilla {
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// Win32 "Event" wrapper. Must be paired with a CriticalSection to create a
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// Java-style "monitor".
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class Signal {
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public:
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Signal(CriticalSection* aLock)
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: mLock(aLock)
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{
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CriticalSectionAutoEnter lock(*mLock);
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mEvent = CreateEvent(nullptr, FALSE, FALSE, nullptr);
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}
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~Signal() {
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CriticalSectionAutoEnter lock(*mLock);
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CloseHandle(mEvent);
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}
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// Lock must be held.
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void Notify() {
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SetEvent(mEvent);
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}
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// Lock must be held. Check the wait condition before waiting!
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HRESULT Wait() {
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mLock->Leave();
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DWORD result = WaitForSingleObject(mEvent, INFINITE);
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mLock->Enter();
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return result == WAIT_OBJECT_0 ? S_OK : E_FAIL;
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}
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private:
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CriticalSection* mLock;
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HANDLE mEvent;
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};
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HRESULT
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AddGraphToRunningObjectTable(IUnknown *aUnkGraph, DWORD *aOutRotRegister);
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void
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RemoveGraphFromRunningObjectTable(DWORD aRotRegister);
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const char*
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GetGraphNotifyString(long evCode);
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// Creates a filter and adds it to a graph.
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HRESULT
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CreateAndAddFilter(IGraphBuilder* aGraph,
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REFGUID aFilterClsId,
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LPCWSTR aFilterName,
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IBaseFilter **aOutFilter);
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HRESULT
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AddMP3DMOWrapperFilter(IGraphBuilder* aGraph,
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IBaseFilter **aOutFilter);
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// Connects the output pin on aOutputFilter to an input pin on
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// aInputFilter, in aGraph.
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HRESULT
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ConnectFilters(IGraphBuilder* aGraph,
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IBaseFilter* aOutputFilter,
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IBaseFilter* aInputFilter);
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HRESULT
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MatchUnconnectedPin(IPin* aPin,
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PIN_DIRECTION aPinDir,
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bool *aOutMatches);
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// Converts from microseconds to DirectShow "Reference Time"
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// (hundreds of nanoseconds).
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inline int64_t
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UsecsToRefTime(const int64_t aUsecs)
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{
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return aUsecs * 10;
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}
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// Converts from DirectShow "Reference Time" (hundreds of nanoseconds)
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// to microseconds.
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inline int64_t
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RefTimeToUsecs(const int64_t hRefTime)
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{
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return hRefTime / 10;
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}
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// Converts from DirectShow "Reference Time" (hundreds of nanoseconds)
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// to seconds.
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inline double
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RefTimeToSeconds(const REFERENCE_TIME aRefTime)
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{
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return double(aRefTime) / 10000000;
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}
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#if defined(PR_LOGGING)
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const char*
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GetDirectShowGuidName(const GUID& aGuid);
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#endif
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} // namespace mozilla
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#endif
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