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/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef _DirectShowUtils_h_
#define _DirectShowUtils_h_
#include <stdint.h>
#include "dshow.h"
// XXXbz windowsx.h defines GetFirstChild, GetNextSibling,
// GetPrevSibling are macros, apparently... Eeevil. We have functions
// called that on some classes, so undef them.
#undef GetFirstChild
#undef GetNextSibling
#undef GetPrevSibling
#include "DShowTools.h"
#include "mozilla/Logging.h"
namespace mozilla {
// Win32 "Event" wrapper. Must be paired with a CriticalSection to create a
// Java-style "monitor".
class Signal {
public:
Signal(CriticalSection* aLock)
: mLock(aLock)
{
CriticalSectionAutoEnter lock(*mLock);
mEvent = CreateEvent(nullptr, FALSE, FALSE, nullptr);
}
~Signal() {
CriticalSectionAutoEnter lock(*mLock);
CloseHandle(mEvent);
}
// Lock must be held.
void Notify() {
SetEvent(mEvent);
}
// Lock must be held. Check the wait condition before waiting!
HRESULT Wait() {
mLock->Leave();
DWORD result = WaitForSingleObject(mEvent, INFINITE);
mLock->Enter();
return result == WAIT_OBJECT_0 ? S_OK : E_FAIL;
}
private:
CriticalSection* mLock;
HANDLE mEvent;
};
HRESULT
AddGraphToRunningObjectTable(IUnknown *aUnkGraph, DWORD *aOutRotRegister);
void
RemoveGraphFromRunningObjectTable(DWORD aRotRegister);
const char*
GetGraphNotifyString(long evCode);
// Creates a filter and adds it to a graph.
HRESULT
CreateAndAddFilter(IGraphBuilder* aGraph,
REFGUID aFilterClsId,
LPCWSTR aFilterName,
IBaseFilter **aOutFilter);
HRESULT
AddMP3DMOWrapperFilter(IGraphBuilder* aGraph,
IBaseFilter **aOutFilter);
// Connects the output pin on aOutputFilter to an input pin on
// aInputFilter, in aGraph.
HRESULT
ConnectFilters(IGraphBuilder* aGraph,
IBaseFilter* aOutputFilter,
IBaseFilter* aInputFilter);
HRESULT
MatchUnconnectedPin(IPin* aPin,
PIN_DIRECTION aPinDir,
bool *aOutMatches);
// Converts from microseconds to DirectShow "Reference Time"
// (hundreds of nanoseconds).
inline int64_t
UsecsToRefTime(const int64_t aUsecs)
{
return aUsecs * 10;
}
// Converts from DirectShow "Reference Time" (hundreds of nanoseconds)
// to microseconds.
inline int64_t
RefTimeToUsecs(const int64_t hRefTime)
{
return hRefTime / 10;
}
// Converts from DirectShow "Reference Time" (hundreds of nanoseconds)
// to seconds.
inline double
RefTimeToSeconds(const REFERENCE_TIME aRefTime)
{
return double(aRefTime) / 10000000;
}
const char*
GetDirectShowGuidName(const GUID& aGuid);
// Returns true if we can instantiate an MP3 demuxer and decoder filters.
// Use this to detect whether MP3 support is installed.
bool
CanDecodeMP3UsingDirectShow();
} // namespace mozilla
#endif
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