DirectShow: use the EVR in the window control.

Reuse existing code from the WMF plugin, which already uses the EVR.
This enables HW-accelerated video decoding when using QMediaPlayer
with a QVideoWidget.

Task-number: QTBUG-45593
Change-Id: I757e4d53cd2c648aee6ba33a4851a8c6adc62843
Reviewed-by: Christian Stromme <christian.stromme@theqtcompany.com>

1 files changed, 355 insertions, 0 deletions

diff --git a/src/plugins/common/evr/evrvideowindowcontrol.cpp b/src/plugins/common/evr/evrvideowindowcontrol.cpp
new file mode 100644
index 000000000..faa23d6e5
--- /dev/null
+++ b/src/plugins/common/evr/evrvideowindowcontrol.cpp
@@ -0,0 +1,355 @@
+/****************************************************************************
+**
+** 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 "evrvideowindowcontrol.h"
+
+#ifndef QT_NO_WIDGETS
+#include <qwidget.h>
+#endif
+
+EvrVideoWindowControl::EvrVideoWindowControl(QObject *parent)
+    : QVideoWindowControl(parent)
+    , m_windowId(0)
+    , m_windowColor(RGB(0, 0, 0))
+    , m_dirtyValues(0)
+    , m_aspectRatioMode(Qt::KeepAspectRatio)
+    , m_brightness(0)
+    , m_contrast(0)
+    , m_hue(0)
+    , m_saturation(0)
+    , m_fullScreen(false)
+    , m_displayControl(0)
+    , m_processor(0)
+{
+}
+
+EvrVideoWindowControl::~EvrVideoWindowControl()
+{
+   clear();
+}
+
+bool EvrVideoWindowControl::setEvr(IUnknown *evr)
+{
+    clear();
+
+    if (!evr)
+        return true;
+
+    static const GUID mr_VIDEO_RENDER_SERVICE = { 0x1092a86c, 0xab1a, 0x459a, {0xa3, 0x36, 0x83, 0x1f, 0xbc, 0x4d, 0x11, 0xff} };
+    static const GUID mr_VIDEO_MIXER_SERVICE = { 0x73cd2fc, 0x6cf4, 0x40b7, {0x88, 0x59, 0xe8, 0x95, 0x52, 0xc8, 0x41, 0xf8} };
+    IMFGetService *service = NULL;
+
+    if (SUCCEEDED(evr->QueryInterface(IID_PPV_ARGS(&service)))
+            && SUCCEEDED(service->GetService(mr_VIDEO_RENDER_SERVICE, IID_PPV_ARGS(&m_displayControl)))) {
+
+        service->GetService(mr_VIDEO_MIXER_SERVICE, IID_PPV_ARGS(&m_processor));
+
+        setWinId(m_windowId);
+        setDisplayRect(m_displayRect);
+        setAspectRatioMode(m_aspectRatioMode);
+        m_dirtyValues = DXVA2_ProcAmp_Brightness | DXVA2_ProcAmp_Contrast | DXVA2_ProcAmp_Hue | DXVA2_ProcAmp_Saturation;
+        applyImageControls();
+    }
+
+    if (service)
+        service->Release();
+
+    return m_displayControl != NULL;
+}
+
+void EvrVideoWindowControl::clear()
+{
+    if (m_displayControl)
+        m_displayControl->Release();
+    m_displayControl = NULL;
+
+    if (m_processor)
+        m_processor->Release();
+    m_processor = NULL;
+}
+
+WId EvrVideoWindowControl::winId() const
+{
+    return m_windowId;
+}
+
+void EvrVideoWindowControl::setWinId(WId id)
+{
+    m_windowId = id;
+
+#ifndef QT_NO_WIDGETS
+    if (QWidget *widget = QWidget::find(m_windowId)) {
+        const QColor color = widget->palette().color(QPalette::Window);
+
+        m_windowColor = RGB(color.red(), color.green(), color.blue());
+    }
+#endif
+
+    if (m_displayControl)
+        m_displayControl->SetVideoWindow(HWND(m_windowId));
+}
+
+QRect EvrVideoWindowControl::displayRect() const
+{
+    return m_displayRect;
+}
+
+void EvrVideoWindowControl::setDisplayRect(const QRect &rect)
+{
+    m_displayRect = rect;
+
+    if (m_displayControl) {
+        RECT displayRect = { rect.left(), rect.top(), rect.right() + 1, rect.bottom() + 1 };
+        QSize sourceSize = nativeSize();
+
+        RECT sourceRect = { 0, 0, sourceSize.width(), sourceSize.height() };
+
+        if (m_aspectRatioMode == Qt::KeepAspectRatioByExpanding) {
+            QSize clippedSize = rect.size();
+            clippedSize.scale(sourceRect.right, sourceRect.bottom, Qt::KeepAspectRatio);
+
+            sourceRect.left = (sourceRect.right - clippedSize.width()) / 2;
+            sourceRect.top = (sourceRect.bottom - clippedSize.height()) / 2;
+            sourceRect.right = sourceRect.left + clippedSize.width();
+            sourceRect.bottom = sourceRect.top + clippedSize.height();
+        }
+
+        if (sourceSize.width() > 0 && sourceSize.height() > 0) {
+            MFVideoNormalizedRect sourceNormRect;
+            sourceNormRect.left = float(sourceRect.left) / float(sourceRect.right);
+            sourceNormRect.top = float(sourceRect.top) / float(sourceRect.bottom);
+            sourceNormRect.right = float(sourceRect.right) / float(sourceRect.right);
+            sourceNormRect.bottom = float(sourceRect.bottom) / float(sourceRect.bottom);
+            m_displayControl->SetVideoPosition(&sourceNormRect, &displayRect);
+        } else {
+            m_displayControl->SetVideoPosition(NULL, &displayRect);
+        }
+    }
+}
+
+bool EvrVideoWindowControl::isFullScreen() const
+{
+    return m_fullScreen;
+}
+
+void EvrVideoWindowControl::setFullScreen(bool fullScreen)
+{
+    if (m_fullScreen == fullScreen)
+        return;
+    emit fullScreenChanged(m_fullScreen = fullScreen);
+}
+
+void EvrVideoWindowControl::repaint()
+{
+    QSize size = nativeSize();
+    if (size.width() > 0 && size.height() > 0
+        && m_displayControl
+        && SUCCEEDED(m_displayControl->RepaintVideo())) {
+        return;
+    }
+
+    PAINTSTRUCT paint;
+    if (HDC dc = ::BeginPaint(HWND(m_windowId), &paint)) {
+        HPEN pen = ::CreatePen(PS_SOLID, 1, m_windowColor);
+        HBRUSH brush = ::CreateSolidBrush(m_windowColor);
+        ::SelectObject(dc, pen);
+        ::SelectObject(dc, brush);
+
+        ::Rectangle(
+                dc,
+                m_displayRect.left(),
+                m_displayRect.top(),
+                m_displayRect.right() + 1,
+                m_displayRect.bottom() + 1);
+
+        ::DeleteObject(pen);
+        ::DeleteObject(brush);
+        ::EndPaint(HWND(m_windowId), &paint);
+    }
+}
+
+QSize EvrVideoWindowControl::nativeSize() const
+{
+    QSize size;
+    if (m_displayControl) {
+        SIZE sourceSize;
+        if (SUCCEEDED(m_displayControl->GetNativeVideoSize(&sourceSize, 0)))
+            size = QSize(sourceSize.cx, sourceSize.cy);
+    }
+    return size;
+}
+
+Qt::AspectRatioMode EvrVideoWindowControl::aspectRatioMode() const
+{
+    return m_aspectRatioMode;
+}
+
+void EvrVideoWindowControl::setAspectRatioMode(Qt::AspectRatioMode mode)
+{
+    m_aspectRatioMode = mode;
+
+    if (m_displayControl) {
+        switch (mode) {
+        case Qt::IgnoreAspectRatio:
+            //comment from MSDN: Do not maintain the aspect ratio of the video. Stretch the video to fit the output rectangle.
+            m_displayControl->SetAspectRatioMode(MFVideoARMode_None);
+            break;
+        case Qt::KeepAspectRatio:
+            //comment from MSDN: Preserve the aspect ratio of the video by letterboxing or within the output rectangle.
+            m_displayControl->SetAspectRatioMode(MFVideoARMode_PreservePicture);
+            break;
+        case Qt::KeepAspectRatioByExpanding:
+            //for this mode, more adjustment will be done in setDisplayRect
+            m_displayControl->SetAspectRatioMode(MFVideoARMode_PreservePicture);
+            break;
+        default:
+            break;
+        }
+        setDisplayRect(m_displayRect);
+    }
+}
+
+int EvrVideoWindowControl::brightness() const
+{
+    return m_brightness;
+}
+
+void EvrVideoWindowControl::setBrightness(int brightness)
+{
+    if (m_brightness == brightness)
+        return;
+
+    m_brightness = brightness;
+
+    m_dirtyValues |= DXVA2_ProcAmp_Brightness;
+
+    applyImageControls();
+
+    emit brightnessChanged(brightness);
+}
+
+int EvrVideoWindowControl::contrast() const
+{
+    return m_contrast;
+}
+
+void EvrVideoWindowControl::setContrast(int contrast)
+{
+    if (m_contrast == contrast)
+        return;
+
+    m_contrast = contrast;
+
+    m_dirtyValues |= DXVA2_ProcAmp_Contrast;
+
+    applyImageControls();
+
+    emit contrastChanged(contrast);
+}
+
+int EvrVideoWindowControl::hue() const
+{
+    return m_hue;
+}
+
+void EvrVideoWindowControl::setHue(int hue)
+{
+    if (m_hue == hue)
+        return;
+
+    m_hue = hue;
+
+    m_dirtyValues |= DXVA2_ProcAmp_Hue;
+
+    applyImageControls();
+
+    emit hueChanged(hue);
+}
+
+int EvrVideoWindowControl::saturation() const
+{
+    return m_saturation;
+}
+
+void EvrVideoWindowControl::setSaturation(int saturation)
+{
+    if (m_saturation == saturation)
+        return;
+
+    m_saturation = saturation;
+
+    m_dirtyValues |= DXVA2_ProcAmp_Saturation;
+
+    applyImageControls();
+
+    emit saturationChanged(saturation);
+}
+
+void EvrVideoWindowControl::applyImageControls()
+{
+    if (m_processor) {
+        DXVA2_ProcAmpValues values;
+        if (m_dirtyValues & DXVA2_ProcAmp_Brightness) {
+            values.Brightness = scaleProcAmpValue(DXVA2_ProcAmp_Brightness, m_brightness);
+        }
+        if (m_dirtyValues & DXVA2_ProcAmp_Contrast) {
+            values.Contrast = scaleProcAmpValue(DXVA2_ProcAmp_Contrast, m_contrast);
+        }
+        if (m_dirtyValues & DXVA2_ProcAmp_Hue) {
+            values.Hue = scaleProcAmpValue(DXVA2_ProcAmp_Hue, m_hue);
+        }
+        if (m_dirtyValues & DXVA2_ProcAmp_Saturation) {
+            values.Saturation = scaleProcAmpValue(DXVA2_ProcAmp_Saturation, m_saturation);
+        }
+
+        if (SUCCEEDED(m_processor->SetProcAmpValues(m_dirtyValues, &values))) {
+            m_dirtyValues = 0;
+        }
+    }
+}
+
+DXVA2_Fixed32 EvrVideoWindowControl::scaleProcAmpValue(DWORD prop, int value) const
+{
+    float scaledValue = 0.0;
+
+    DXVA2_ValueRange  range;
+    if (SUCCEEDED(m_processor->GetProcAmpRange(prop, &range))) {
+        scaledValue = DXVA2FixedToFloat(range.DefaultValue);
+        if (value > 0)
+            scaledValue += float(value) * (DXVA2FixedToFloat(range.MaxValue) - DXVA2FixedToFloat(range.DefaultValue)) / 100;
+        else if (value < 0)
+            scaledValue -= float(value) * (DXVA2FixedToFloat(range.MinValue) - DXVA2FixedToFloat(range.DefaultValue)) / 100;
+    }
+
+    return DXVA2FloatToFixed(scaledValue);
+}