1 files changed, 85 insertions, 0 deletions
diff --git a/src/plugins/common/evr/evrhelpers.h b/src/plugins/common/evr/evrhelpers.h
new file mode 100644
index 000000000..3883379a0
--- /dev/null
+++ b/src/plugins/common/evr/evrhelpers.h
@@ -0,0 +1,85 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef EVRHELPERS_H
+#define EVRHELPERS_H
+
+#include "evrdefs.h"
+
+template<class T>
+static inline void qt_evr_safe_release(T **unk)
+{
+    if (*unk) {
+        (*unk)->Release();
+        *unk = NULL;
+    }
+}
+
+HRESULT qt_evr_getFourCC(IMFMediaType *type, DWORD *fourCC);
+
+bool qt_evr_areMediaTypesEqual(IMFMediaType *type1, IMFMediaType *type2);
+
+HRESULT qt_evr_validateVideoArea(const MFVideoArea& area, UINT32 width, UINT32 height);
+
+bool qt_evr_isSampleTimePassed(IMFClock *clock, IMFSample *sample);
+
+inline float qt_evr_MFOffsetToFloat(const MFOffset& offset)
+{
+    return offset.value + (float(offset.fract) / 65536);
+}
+
+inline MFOffset qt_evr_makeMFOffset(float v)
+{
+    MFOffset offset;
+    offset.value = short(v);
+    offset.fract = WORD(65536 * (v-offset.value));
+    return offset;
+}
+
+inline MFVideoArea qt_evr_makeMFArea(float x, float y, DWORD width, DWORD height)
+{
+    MFVideoArea area;
+    area.OffsetX = qt_evr_makeMFOffset(x);
+    area.OffsetY = qt_evr_makeMFOffset(y);
+    area.Area.cx = width;
+    area.Area.cy = height;
+    return area;
+}
+
+inline HRESULT qt_evr_getFrameRate(IMFMediaType *pType, MFRatio *pRatio)
+{
+    return MFGetAttributeRatio(pType, MF_MT_FRAME_RATE, (UINT32*)&pRatio->Numerator, (UINT32*)&pRatio->Denominator);
+}
+
+#endif // EVRHELPERS_H
+