DirectShow: use the EVR in the renderer control.

As for the window control, the existing code from the WMF plugin has
been refactored out and is now shared for both plugins.
This enables HW-accelerated video decoding in QML, QGraphicsVideoItem
and custom QAbstractVideoSurfaces (Angle is required).

Task-number: QTBUG-45593
Change-Id: I1d4dbf5695cdd4dbee93f9f4a957fa4d813aa85d
Reviewed-by: Christian Stromme <christian.stromme@theqtcompany.com>

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
+