1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/directshow/DirectShowUtils.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,115 @@
1.4 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef _DirectShowUtils_h_
1.10 +#define _DirectShowUtils_h_
1.11 +
1.12 +#include <stdint.h>
1.13 +#include "dshow.h"
1.14 +#include "DShowTools.h"
1.15 +#include "prlog.h"
1.16 +
1.17 +namespace mozilla {
1.18 +
1.19 +// Win32 "Event" wrapper. Must be paired with a CriticalSection to create a
1.20 +// Java-style "monitor".
1.21 +class Signal {
1.22 +public:
1.23 +
1.24 + Signal(CriticalSection* aLock)
1.25 + : mLock(aLock)
1.26 + {
1.27 + CriticalSectionAutoEnter lock(*mLock);
1.28 + mEvent = CreateEvent(nullptr, FALSE, FALSE, nullptr);
1.29 + }
1.30 +
1.31 + ~Signal() {
1.32 + CriticalSectionAutoEnter lock(*mLock);
1.33 + CloseHandle(mEvent);
1.34 + }
1.35 +
1.36 + // Lock must be held.
1.37 + void Notify() {
1.38 + SetEvent(mEvent);
1.39 + }
1.40 +
1.41 + // Lock must be held. Check the wait condition before waiting!
1.42 + HRESULT Wait() {
1.43 + mLock->Leave();
1.44 + DWORD result = WaitForSingleObject(mEvent, INFINITE);
1.45 + mLock->Enter();
1.46 + return result == WAIT_OBJECT_0 ? S_OK : E_FAIL;
1.47 + }
1.48 +
1.49 +private:
1.50 + CriticalSection* mLock;
1.51 + HANDLE mEvent;
1.52 +};
1.53 +
1.54 +HRESULT
1.55 +AddGraphToRunningObjectTable(IUnknown *aUnkGraph, DWORD *aOutRotRegister);
1.56 +
1.57 +void
1.58 +RemoveGraphFromRunningObjectTable(DWORD aRotRegister);
1.59 +
1.60 +const char*
1.61 +GetGraphNotifyString(long evCode);
1.62 +
1.63 +// Creates a filter and adds it to a graph.
1.64 +HRESULT
1.65 +CreateAndAddFilter(IGraphBuilder* aGraph,
1.66 + REFGUID aFilterClsId,
1.67 + LPCWSTR aFilterName,
1.68 + IBaseFilter **aOutFilter);
1.69 +
1.70 +HRESULT
1.71 +AddMP3DMOWrapperFilter(IGraphBuilder* aGraph,
1.72 + IBaseFilter **aOutFilter);
1.73 +
1.74 +// Connects the output pin on aOutputFilter to an input pin on
1.75 +// aInputFilter, in aGraph.
1.76 +HRESULT
1.77 +ConnectFilters(IGraphBuilder* aGraph,
1.78 + IBaseFilter* aOutputFilter,
1.79 + IBaseFilter* aInputFilter);
1.80 +
1.81 +HRESULT
1.82 +MatchUnconnectedPin(IPin* aPin,
1.83 + PIN_DIRECTION aPinDir,
1.84 + bool *aOutMatches);
1.85 +
1.86 +// Converts from microseconds to DirectShow "Reference Time"
1.87 +// (hundreds of nanoseconds).
1.88 +inline int64_t
1.89 +UsecsToRefTime(const int64_t aUsecs)
1.90 +{
1.91 + return aUsecs * 10;
1.92 +}
1.93 +
1.94 +// Converts from DirectShow "Reference Time" (hundreds of nanoseconds)
1.95 +// to microseconds.
1.96 +inline int64_t
1.97 +RefTimeToUsecs(const int64_t hRefTime)
1.98 +{
1.99 + return hRefTime / 10;
1.100 +}
1.101 +
1.102 +// Converts from DirectShow "Reference Time" (hundreds of nanoseconds)
1.103 +// to seconds.
1.104 +inline double
1.105 +RefTimeToSeconds(const REFERENCE_TIME aRefTime)
1.106 +{
1.107 + return double(aRefTime) / 10000000;
1.108 +}
1.109 +
1.110 +
1.111 +#if defined(PR_LOGGING)
1.112 +const char*
1.113 +GetDirectShowGuidName(const GUID& aGuid);
1.114 +#endif
1.115 +
1.116 +} // namespace mozilla
1.117 +
1.118 +#endif
