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39
40 #ifndef EVRHELPERS_H
41 #define EVRHELPERS_H
42
43 #include "evrdefs.h"
44 #include <qvideoframe.h>
45
46 QT_BEGIN_NAMESPACE
47
48 template<class T>
qt_evr_safe_release(T ** unk)49 static inline void qt_evr_safe_release(T **unk)
50 {
51 if (*unk) {
52 (*unk)->Release();
53 *unk = NULL;
54 }
55 }
56
57 HRESULT qt_evr_getFourCC(IMFMediaType *type, DWORD *fourCC);
58
59 bool qt_evr_areMediaTypesEqual(IMFMediaType *type1, IMFMediaType *type2);
60
61 HRESULT qt_evr_validateVideoArea(const MFVideoArea& area, UINT32 width, UINT32 height);
62
63 bool qt_evr_isSampleTimePassed(IMFClock *clock, IMFSample *sample);
64
qt_evr_MFOffsetToFloat(const MFOffset & offset)65 inline float qt_evr_MFOffsetToFloat(const MFOffset& offset)
66 {
67 return offset.value + (float(offset.fract) / 65536);
68 }
69
qt_evr_makeMFOffset(float v)70 inline MFOffset qt_evr_makeMFOffset(float v)
71 {
72 MFOffset offset;
73 offset.value = short(v);
74 offset.fract = WORD(65536 * (v-offset.value));
75 return offset;
76 }
77
qt_evr_makeMFArea(float x,float y,DWORD width,DWORD height)78 inline MFVideoArea qt_evr_makeMFArea(float x, float y, DWORD width, DWORD height)
79 {
80 MFVideoArea area;
81 area.OffsetX = qt_evr_makeMFOffset(x);
82 area.OffsetY = qt_evr_makeMFOffset(y);
83 area.Area.cx = width;
84 area.Area.cy = height;
85 return area;
86 }
87
qt_evr_getFrameRate(IMFMediaType * pType,MFRatio * pRatio)88 inline HRESULT qt_evr_getFrameRate(IMFMediaType *pType, MFRatio *pRatio)
89 {
90 return MFGetAttributeRatio(pType, MF_MT_FRAME_RATE,
91 reinterpret_cast<UINT32*>(&pRatio->Numerator),
92 reinterpret_cast<UINT32*>(&pRatio->Denominator));
93 }
94
95 QVideoFrame::PixelFormat qt_evr_pixelFormatFromD3DFormat(DWORD format);
96 D3DFORMAT qt_evr_D3DFormatFromPixelFormat(QVideoFrame::PixelFormat format);
97
98 QT_END_NAMESPACE
99
100 #endif // EVRHELPERS_H
101
102