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    41 

    42 #ifndef VIDEOSURFACEFILTER_H

    43 #define VIDEOSURFACEFILTER_H

    44 

    45 #include "directshowmediatypelist.h"

    46 #include "directshowsamplescheduler.h"

    47 #include "directshowmediatype.h"

    48 

    49 #include <QtCore/qbasictimer.h>

    50 #include <QtCore/qcoreevent.h>

    51 #include <QtCore/qmutex.h>

    52 #include <QtCore/qsemaphore.h>

    53 #include <QtCore/qstring.h>

    54 #include <QtCore/qwaitcondition.h>

    55 

    56 #include <dshow.h>

    57 

    58 QT_BEGIN_NAMESPACE

    59 class QAbstractVideoSurface;

    60 QT_END_NAMESPACE

    61 

    62 class DirectShowEventLoop;

    63 

    64 class VideoSurfaceFilter

    65     : public QObject

    66     , public DirectShowMediaTypeList

    67     , public IBaseFilter

    68     , public IAMFilterMiscFlags

    69     , public IPin

    70 {

    71     Q_OBJECT

    72 public:

    73     VideoSurfaceFilter(

    74             QAbstractVideoSurface *surface, DirectShowEventLoop *loop, QObject *parent = 0);

    75     ~VideoSurfaceFilter();

    76 

    77     // IUnknown

    78     HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppvObject);

    79     ULONG STDMETHODCALLTYPE AddRef();

    80     ULONG STDMETHODCALLTYPE Release();

    81 

    82     // IPersist

    83     HRESULT STDMETHODCALLTYPE GetClassID(CLSID *pClassID);

    84 

    85     // IMediaFilter

    86     HRESULT STDMETHODCALLTYPE Run(REFERENCE_TIME tStart);

    87     HRESULT STDMETHODCALLTYPE Pause();

    88     HRESULT STDMETHODCALLTYPE Stop();

    89 

    90     HRESULT STDMETHODCALLTYPE GetState(DWORD dwMilliSecsTimeout, FILTER_STATE *pState);

    91 

    92     HRESULT STDMETHODCALLTYPE SetSyncSource(IReferenceClock *pClock);

    93     HRESULT STDMETHODCALLTYPE GetSyncSource(IReferenceClock **ppClock);

    94 

    95     // IBaseFilter

    96     HRESULT STDMETHODCALLTYPE EnumPins(IEnumPins **ppEnum);

    97     HRESULT STDMETHODCALLTYPE FindPin(LPCWSTR Id, IPin **ppPin);

    98 

    99     HRESULT STDMETHODCALLTYPE JoinFilterGraph(IFilterGraph *pGraph, LPCWSTR pName);

   100 

   101     HRESULT STDMETHODCALLTYPE QueryFilterInfo(FILTER_INFO *pInfo);

   102     HRESULT STDMETHODCALLTYPE QueryVendorInfo(LPWSTR *pVendorInfo);

   103 

   104     // IAMFilterMiscFlags

   105     ULONG STDMETHODCALLTYPE GetMiscFlags();

   106 

   107     // IPin

   108     HRESULT STDMETHODCALLTYPE Connect(IPin *pReceivePin, const AM_MEDIA_TYPE *pmt);

   109     HRESULT STDMETHODCALLTYPE ReceiveConnection(IPin *pConnector, const AM_MEDIA_TYPE *pmt);

   110     HRESULT STDMETHODCALLTYPE Disconnect();

   111     HRESULT STDMETHODCALLTYPE ConnectedTo(IPin **ppPin);

   112 

   113     HRESULT STDMETHODCALLTYPE ConnectionMediaType(AM_MEDIA_TYPE *pmt);

   114 

   115     HRESULT STDMETHODCALLTYPE QueryPinInfo(PIN_INFO *pInfo);

   116     HRESULT STDMETHODCALLTYPE QueryId(LPWSTR *Id);

   117 

   118     HRESULT STDMETHODCALLTYPE QueryAccept(const AM_MEDIA_TYPE *pmt);

   119 

   120     HRESULT STDMETHODCALLTYPE EnumMediaTypes(IEnumMediaTypes **ppEnum);

   121 

   122     HRESULT STDMETHODCALLTYPE QueryInternalConnections(IPin **apPin, ULONG *nPin);

   123 

   124     HRESULT STDMETHODCALLTYPE EndOfStream();

   125 

   126     HRESULT STDMETHODCALLTYPE BeginFlush();

   127     HRESULT STDMETHODCALLTYPE EndFlush();

   128 

   129     HRESULT STDMETHODCALLTYPE NewSegment(REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate);

   130 

   131     HRESULT STDMETHODCALLTYPE QueryDirection(PIN_DIRECTION *pPinDir);

   132 

   133     int currentMediaTypeToken();

   134     HRESULT nextMediaType(

   135             int token, int *index, ULONG count, AM_MEDIA_TYPE **types, ULONG *fetchedCount);

   136     HRESULT skipMediaType(int token, int *index, ULONG count);

   137     HRESULT cloneMediaType(int token, int index, IEnumMediaTypes **enumeration);

   138 

   139 protected:

   140     void customEvent(QEvent *event);

   141 

   142 private Q_SLOTS:

   143     void supportedFormatsChanged();

   144     void sampleReady();

   145 

   146 private:

   147     HRESULT start();

   148     void stop();

   149     void flush();

   150 

   151     enum

   152     {

   153         StartSurface = QEvent::User,

   154         StopSurface,

   155         FlushSurface

   156     };

   157 

   158     LONG m_ref;

   159     FILTER_STATE m_state;

   160     QAbstractVideoSurface *m_surface;

   161     DirectShowEventLoop *m_loop;

   162     IFilterGraph *m_graph;

   163     IPin *m_peerPin;

   164     int m_bytesPerLine;

   165     HRESULT m_startResult;

   166     QString m_name;

   167     QString m_pinId;

   168     DirectShowMediaType m_mediaType;

   169     QVideoSurfaceFormat m_surfaceFormat;

   170     QMutex m_mutex;

   171     QWaitCondition m_wait;

   172     DirectShowSampleScheduler m_sampleScheduler;

   173 };

   174 

   175 #endif