modules/video_capture/windows/sink_filter_ds.h

/*
 *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef WEBRTC_MODULES_VIDEO_CAPTURE_MAIN_SOURCE_WINDOWS_SINK_FILTER_DS_H_
#define WEBRTC_MODULES_VIDEO_CAPTURE_MAIN_SOURCE_WINDOWS_SINK_FILTER_DS_H_

#include <Streams.h> // Include base DS filter header files

#include "webrtc/modules/video_capture/video_capture_defines.h"

namespace webrtc
{
namespace videocapturemodule
{
//forward declaration

class CaptureSinkFilter;
/**
 *	input pin for camera input
 *
 */
class CaptureInputPin: public CBaseInputPin
{
public:
    VideoCaptureCapability _requestedCapability;
    VideoCaptureCapability _resultingCapability;
    HANDLE _threadHandle;

    CaptureInputPin(IN TCHAR* szName,
                    IN CaptureSinkFilter* pFilter,
                    IN CCritSec * pLock,
                    OUT HRESULT * pHr,
                    IN LPCWSTR pszName);
    virtual ~CaptureInputPin();

    HRESULT GetMediaType (IN int iPos, OUT CMediaType * pmt);
    HRESULT CheckMediaType (IN const CMediaType * pmt);
    STDMETHODIMP Receive (IN IMediaSample *);
    HRESULT SetMatchingMediaType(const VideoCaptureCapability& capability);
};

class CaptureSinkFilter: public CBaseFilter
{

public:
    CaptureSinkFilter(IN TCHAR * tszName,
                      IN LPUNKNOWN punk,
                      OUT HRESULT * phr,
                      VideoCaptureExternal& captureObserver);
    virtual ~CaptureSinkFilter();

    //  --------------------------------------------------------------------
    //  class methods

    void ProcessCapturedFrame(unsigned char* pBuffer, size_t length,
                              const VideoCaptureCapability& frameInfo);
    //  explicit receiver lock aquisition and release
    void LockReceive()  { m_crtRecv.Lock();}
    void UnlockReceive() {m_crtRecv.Unlock();}
    //  explicit filter lock aquisition and release
    void LockFilter() {m_crtFilter.Lock();}
    void UnlockFilter() { m_crtFilter.Unlock(); }
    void SetFilterGraph(IGraphBuilder* graph); // Used if EVR

    //  --------------------------------------------------------------------
    //  COM interfaces
DECLARE_IUNKNOWN    ;
    STDMETHODIMP SetMatchingMediaType(const VideoCaptureCapability& capability);

    //  --------------------------------------------------------------------
    //  CBaseFilter methods
    int GetPinCount ();
    CBasePin * GetPin ( IN int Index);
    STDMETHODIMP Pause ();
    STDMETHODIMP Stop ();
    STDMETHODIMP GetClassID ( OUT CLSID * pCLSID);
    //  --------------------------------------------------------------------
    //  class factory calls this
    static CUnknown * CreateInstance (IN LPUNKNOWN punk, OUT HRESULT * phr);
private:
    CCritSec m_crtFilter; //  filter lock
    CCritSec m_crtRecv;  //  receiver lock; always acquire before filter lock
    CaptureInputPin * m_pInput;
    VideoCaptureExternal& _captureObserver;
};
}  // namespace videocapturemodule
}  // namespace webrtc
#endif // WEBRTC_MODULES_VIDEO_CAPTURE_MAIN_SOURCE_WINDOWS_SINK_FILTER_DS_H_