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      1 /*
      2  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #ifndef WEBRTC_MODULES_VIDEO_CAPTURE_MAIN_SOURCE_WINDOWS_SINK_FILTER_DS_H_
     12 #define WEBRTC_MODULES_VIDEO_CAPTURE_MAIN_SOURCE_WINDOWS_SINK_FILTER_DS_H_
     13 
     14 #include <Streams.h> // Include base DS filter header files
     15 
     16 #include "webrtc/modules/video_capture/include/video_capture_defines.h"
     17 
     18 namespace webrtc
     19 {
     20 namespace videocapturemodule
     21 {
     22 //forward declaration
     23 
     24 class CaptureSinkFilter;
     25 /**
     26  *	input pin for camera input
     27  *
     28  */
     29 class CaptureInputPin: public CBaseInputPin
     30 {
     31 public:
     32     int32_t _moduleId;
     33 
     34     VideoCaptureCapability _requestedCapability;
     35     VideoCaptureCapability _resultingCapability;
     36     HANDLE _threadHandle;
     37 
     38     CaptureInputPin(int32_t moduleId,
     39                     IN TCHAR* szName,
     40                     IN CaptureSinkFilter* pFilter,
     41                     IN CCritSec * pLock,
     42                     OUT HRESULT * pHr,
     43                     IN LPCWSTR pszName);
     44     virtual ~CaptureInputPin();
     45 
     46     HRESULT GetMediaType (IN int iPos, OUT CMediaType * pmt);
     47     HRESULT CheckMediaType (IN const CMediaType * pmt);
     48     STDMETHODIMP Receive (IN IMediaSample *);
     49     HRESULT SetMatchingMediaType(const VideoCaptureCapability& capability);
     50 };
     51 
     52 class CaptureSinkFilter: public CBaseFilter
     53 {
     54 
     55 public:
     56     CaptureSinkFilter(IN TCHAR * tszName,
     57                       IN LPUNKNOWN punk,
     58                       OUT HRESULT * phr,
     59                       VideoCaptureExternal& captureObserver,
     60                       int32_t moduleId);
     61     virtual ~CaptureSinkFilter();
     62 
     63     //  --------------------------------------------------------------------
     64     //  class methods
     65 
     66     void ProcessCapturedFrame(unsigned char* pBuffer, int32_t length,
     67                               const VideoCaptureCapability& frameInfo);
     68     //  explicit receiver lock aquisition and release
     69     void LockReceive()  { m_crtRecv.Lock();}
     70     void UnlockReceive() {m_crtRecv.Unlock();}
     71     //  explicit filter lock aquisition and release
     72     void LockFilter() {m_crtFilter.Lock();}
     73     void UnlockFilter() { m_crtFilter.Unlock(); }
     74     void SetFilterGraph(IGraphBuilder* graph); // Used if EVR
     75 
     76     //  --------------------------------------------------------------------
     77     //  COM interfaces
     78 DECLARE_IUNKNOWN    ;
     79     STDMETHODIMP SetMatchingMediaType(const VideoCaptureCapability& capability);
     80 
     81     //  --------------------------------------------------------------------
     82     //  CBaseFilter methods
     83     int GetPinCount ();
     84     CBasePin * GetPin ( IN int Index);
     85     STDMETHODIMP Pause ();
     86     STDMETHODIMP Stop ();
     87     STDMETHODIMP GetClassID ( OUT CLSID * pCLSID);
     88     //  --------------------------------------------------------------------
     89     //  class factory calls this
     90     static CUnknown * CreateInstance (IN LPUNKNOWN punk, OUT HRESULT * phr);
     91 private:
     92     CCritSec m_crtFilter; //  filter lock
     93     CCritSec m_crtRecv;  //  receiver lock; always acquire before filter lock
     94     CaptureInputPin * m_pInput;
     95     VideoCaptureExternal& _captureObserver;
     96     int32_t _moduleId;
     97 };
     98 }  // namespace videocapturemodule
     99 }  // namespace webrtc
    100 #endif // WEBRTC_MODULES_VIDEO_CAPTURE_MAIN_SOURCE_WINDOWS_SINK_FILTER_DS_H_
    101