1 files changed, 103 insertions, 0 deletions
diff --git a/src/plugins/common/evr/evrhelpers.cpp b/src/plugins/common/evr/evrhelpers.cpp
new file mode 100644
index 000000000..ae289de3a
--- /dev/null
+++ b/src/plugins/common/evr/evrhelpers.cpp
@@ -0,0 +1,103 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "evrhelpers.h"
+
+HRESULT qt_evr_getFourCC(IMFMediaType *type, DWORD *fourCC)
+{
+    if (!fourCC)
+        return E_POINTER;
+
+    HRESULT hr = S_OK;
+    GUID guidSubType = GUID_NULL;
+
+    if (SUCCEEDED(hr))
+        hr = type->GetGUID(MF_MT_SUBTYPE, &guidSubType);
+
+    if (SUCCEEDED(hr))
+        *fourCC = guidSubType.Data1;
+
+    return hr;
+}
+
+bool qt_evr_areMediaTypesEqual(IMFMediaType *type1, IMFMediaType *type2)
+{
+    if (!type1 && !type2)
+        return true;
+    else if (!type1 || !type2)
+        return false;
+
+    DWORD dwFlags = 0;
+    HRESULT hr = type1->IsEqual(type2, &dwFlags);
+
+    return (hr == S_OK);
+}
+
+HRESULT qt_evr_validateVideoArea(const MFVideoArea& area, UINT32 width, UINT32 height)
+{
+    float fOffsetX = qt_evr_MFOffsetToFloat(area.OffsetX);
+    float fOffsetY = qt_evr_MFOffsetToFloat(area.OffsetY);
+
+    if ( ((LONG)fOffsetX + area.Area.cx > (LONG)width) ||
+         ((LONG)fOffsetY + area.Area.cy > (LONG)height) )
+        return MF_E_INVALIDMEDIATYPE;
+    else
+        return S_OK;
+}
+
+bool qt_evr_isSampleTimePassed(IMFClock *clock, IMFSample *sample)
+{
+    if (!sample || !clock)
+        return false;
+
+    HRESULT hr = S_OK;
+    MFTIME hnsTimeNow = 0;
+    MFTIME hnsSystemTime = 0;
+    MFTIME hnsSampleStart = 0;
+    MFTIME hnsSampleDuration = 0;
+
+    hr = clock->GetCorrelatedTime(0, &hnsTimeNow, &hnsSystemTime);
+
+    if (SUCCEEDED(hr))
+        hr = sample->GetSampleTime(&hnsSampleStart);
+
+    if (SUCCEEDED(hr))
+        hr = sample->GetSampleDuration(&hnsSampleDuration);
+
+    if (SUCCEEDED(hr)) {
+        if (hnsSampleStart + hnsSampleDuration < hnsTimeNow)
+            return true;
+    }
+
+    return false;
+}