The Tor Browser: content/media/directshow/DirectShowUtils.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     6 #ifndef _DirectShowUtils_h_

     7 #define _DirectShowUtils_h_

     9 #include <stdint.h>

    10 #include "dshow.h"

    11 #include "DShowTools.h"

    12 #include "prlog.h"

    14 namespace mozilla {

    16 // Win32 "Event" wrapper. Must be paired with a CriticalSection to create a

    17 // Java-style "monitor".

    18 class Signal {

    19 public:

    21   Signal(CriticalSection* aLock)

    22     : mLock(aLock)

    23   {

    24     CriticalSectionAutoEnter lock(*mLock);

    25     mEvent = CreateEvent(nullptr, FALSE, FALSE, nullptr);

    26   }

    28   ~Signal() {

    29     CriticalSectionAutoEnter lock(*mLock);

    30     CloseHandle(mEvent);

    31   }

    33   // Lock must be held.

    34   void Notify() {

    35     SetEvent(mEvent);

    36   }

    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   }

    46 private:

    47   CriticalSection* mLock;

    48   HANDLE mEvent;

    49 };

    51 HRESULT

    52 AddGraphToRunningObjectTable(IUnknown *aUnkGraph, DWORD *aOutRotRegister);

    54 void

    55 RemoveGraphFromRunningObjectTable(DWORD aRotRegister);

    57 const char*

    58 GetGraphNotifyString(long evCode);

    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);

    67 HRESULT

    68 AddMP3DMOWrapperFilter(IGraphBuilder* aGraph,

    69                        IBaseFilter **aOutFilter);

    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);

    78 HRESULT

    79 MatchUnconnectedPin(IPin* aPin,

    80                     PIN_DIRECTION aPinDir,

    81                     bool *aOutMatches);

    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 }

    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 }

    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 }

   108 #if defined(PR_LOGGING)

   109 const char*

   110 GetDirectShowGuidName(const GUID& aGuid);

   111 #endif

   113 } // namespace mozilla

   115 #endif

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