Visual Servoing Platform  version 3.2.0 under development (2019-01-22)
vpDirectShowSampleGrabberI.h
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30  *
31  * Description:
32  * DirectShow framegrabber callback.
33  *
34  * Authors:
35  * Bruno Renier
36  *
37  *****************************************************************************/
38 
39 #ifndef vpDirectShowSampleGrabberI_hh
40 #define vpDirectShowSampleGrabberI_hh
41 
42 #ifndef DOXYGEN_SHOULD_SKIP_THIS
43 
44 #include <visp3/core/vpConfig.h>
45 #if (defined(VISP_HAVE_DIRECTSHOW))
46 
47 #include <dshow.h>
48 #include <qedit.h>
49 #include <stdio.h>
50 
51 #include <visp3/core/vpImage.h>
52 #include <visp3/core/vpRGBa.h>
53 
58 class VISP_EXPORT vpDirectShowSampleGrabberI : public ISampleGrabberCB
59 {
60  vpDirectShowSampleGrabberI();
61  virtual ~vpDirectShowSampleGrabberI();
62 
63  // needed by the interface
64  STDMETHODIMP_(ULONG) AddRef() { return 1; }
65  STDMETHODIMP_(ULONG) Release() { return 2; }
66 
67  STDMETHODIMP QueryInterface(REFIID riid, void **ppvObject);
68 
69  // not implemented
70  STDMETHODIMP SampleCB(double Time, IMediaSample *pSample) { return E_NOTIMPL; }
71 
72  // our callback function
73  STDMETHODIMP BufferCB(double Time, BYTE *pBuffer, long BufferLen);
74 
75 private:
76  // the currently connected media type
77  AM_MEDIA_TYPE connectedMediaType;
78 
79  // true if the source media type is not a standard one
80  bool specialMediaType;
81  // true if the image needs to be flipped (only for special media types)
82  bool invertedSource;
83 
84  // booleans used to signal a demand from acquire
85  bool acqGrayDemand;
86  bool acqRGBaDemand;
87 
88  // pointer on the image to fill during the next callback if there has been a
89  // demand
90  vpImage<vpRGBa> *rgbaIm;
91  vpImage<unsigned char> *grayIm;
92 
93  // semaphore used to synchronize the productor (callback) and the consumer
94  // (acquire)
95  HANDLE copySem;
96 
97  friend class vpDirectShowGrabberImpl;
98 };
99 
100 #endif
101 #endif
102 #endif