Qt 调用phonon 在xp下不能播放视频的解决方法(Phonon::createPath: Cannot connect Phonon::MediaObject ( no objectName )...)

xp中用QT的phonon来播放视频时，编译时没有错误，但是播放不出视频，会提示以下warning信息：

WARNING: Phonon::createPath: Cannot connect Phonon::MediaObject ( no objectName ) to MediaVideoWidget ( no objectName ).

解决方法：

1、下载下面链接中的补丁文件 0001-Revert-Add-EVR-to-the-Phonon-DirectShow9-ds9-backend.patch，并对相应的修改文件打补丁；
2、用QT重新编译源码src/plugins/phonon/ds9/ds9.pro；
3、编译后将在 XX/qt/plugins/phonon_backend下生成新的动态库文件：libphonon_ds94.a，phonon_ds94.dll。将这两个文件拷贝到播放程序release版本所在目录下的phonon_backend文件夹下，xp就可以正常播放视频了。

如果编译过程中报错：moc_backendnode.cpp: No such file or directory，将报错文件中 #include "moc_backend.cpp" 一行注释掉再编译就可以了。

补丁链接网页：http://bugreports.qt.nokia.com/browse/QTBUG-13062

0001-Revert-Add-EVR-to-the-Phonon-DirectShow9-ds9-backend.patch内容如下：

From fc5d7fc9a767d08e8c6287b46a0d53ceecb99fb0 Mon Sep 17 00:00:00 2001
From: Maxim Ivanov <maxim@riversrunred.com>
Date: Wed, 1 Sep 2010 14:57:52 +0100
Subject: [PATCH] Revert "Add EVR to the Phonon DirectShow9 (ds9) backend as the default."

This reverts commit 4c34411151516badbf0e286c9a477845cb02b1cc.

Conflicts:

src/3rdparty/phonon/ds9/videorenderer_evr.cpp
src/3rdparty/phonon/ds9/videorenderer_evr.h
src/3rdparty/phonon/ds9/videowidget.cpp
src/plugins/phonon/ds9/ds9.pro
---
src/3rdparty/phonon/ds9/videorenderer_evr.cpp | 217 -------------------------
src/3rdparty/phonon/ds9/videorenderer_evr.h | 56 -------
src/3rdparty/phonon/ds9/videowidget.cpp | 14 +--
src/plugins/phonon/ds9/ds9.pro | 4 +-
4 files changed, 5 insertions(+), 286 deletions(-)
delete mode 100644 src/3rdparty/phonon/ds9/videorenderer_evr.cpp
delete mode 100644 src/3rdparty/phonon/ds9/videorenderer_evr.h

diff --git a/src/3rdparty/phonon/ds9/videorenderer_evr.cpp b/src/3rdparty/phonon/ds9/videorenderer_evr.cpp
deleted file mode 100644
index de3f46f..0000000
--- a/src/3rdparty/phonon/ds9/videorenderer_evr.cpp
+++ /dev/null
@@ -1,217 +0,0 @@
-/* This file is part of the KDE project.
-
-Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-
-This library is free software: you can redistribute it and/or modify
-it under the terms of the GNU Lesser General Public License as published by
-the Free Software Foundation, either version 2.1 or 3 of the License.
-
-This library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU Lesser General Public License for more details.
-
-You should have received a copy of the GNU Lesser General Public License
-along with this library. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-
-#include "videorenderer_evr.h"
-#include "qevr9.h"
-
-#ifndef QT_NO_PHONON_VIDEO
-
-#include <QtGui/QWidget>
-#include <QtGui/QPainter>
-
-QT_BEGIN_NAMESPACE
-
-namespace Phonon
-{
- namespace DS9
- {
- //we have to define them here because not all compilers/sdk have them
- 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} };
- static const IID IID_IMFVideoDisplayControl = {0xa490b1e4, 0xab84, 0x4d31, {0xa1, 0xb2, 0x18, 0x1e, 0x03, 0xb1, 0x07, 0x7a} };
- static const IID IID_IMFVideoMixerControl = {0xA5C6C53F, 0xC202, 0x4aa5, {0x96, 0x95, 0x17, 0x5B, 0xA8, 0xC5, 0x08, 0xA5} };
- static const IID IID_IMFVideoProcessor = {0x6AB0000C, 0xFECE, 0x4d1f, {0xA2, 0xAC, 0xA9, 0x57, 0x35, 0x30, 0x65, 0x6E} };
- static const IID IID_IMFGetService = {0xFA993888, 0x4383, 0x415A, {0xA9, 0x30, 0xDD, 0x47, 0x2A, 0x8C, 0xF6, 0xF7} };
- static const GUID CLSID_EnhancedVideoRenderer = {0xfa10746c, 0x9b63, 0x4b6c, {0xbc, 0x49, 0xfc, 0x30, 0xe, 0xa5, 0xf2, 0x56} };
-
- template <typename T> ComPointer<T> getService(const Filter &filter, REFGUID guidService, REFIID riid)
- {
- //normally we should use IID_IMFGetService but this introduces another dependency
- //so here we simply define our own IId with the same value
- ComPointer<T> ret;
- ComPointer<IMFGetService> getService(filter, IID_IMFGetService);
- if (getService) {
- getService->GetService(guidService, riid, reinterpret_cast<void**>(ret.pparam()));
- }
- return ret;
- }
-
- VideoRendererEVR::~VideoRendererEVR()
- {
- }
-
- bool VideoRendererEVR::isNative() const
- {
- return true;
- }
-
- VideoRendererEVR::VideoRendererEVR(QWidget *target) : m_target(target)
- {
- m_filter = Filter(CLSID_EnhancedVideoRenderer, IID_IBaseFilter);
- if (!m_filter) {
- return;
- }
-
- ComPointer<IMFVideoDisplayControl> filterControl = getService<IMFVideoDisplayControl>(m_filter, MR_VIDEO_RENDER_SERVICE, IID_IMFVideoDisplayControl);
- if (!filterControl) {
- m_filter = Filter(); //will release the interface
- return;
- }
-
- filterControl->SetVideoWindow(reinterpret_cast<HWND>(target->winId()));
- filterControl->SetAspectRatioMode(MFVideoARMode_None); // We're in control of the size
- }
-
- QImage VideoRendererEVR::snapshot() const
- {
- // This will always capture black areas where no video is drawn, if any are present.
- // Due to the hack in notifyResize()
- ComPointer<IMFVideoDisplayControl> filterControl = getService<IMFVideoDisplayControl>(m_filter, MR_VIDEO_RENDER_SERVICE, IID_IMFVideoDisplayControl);
- if (filterControl) {
- BITMAPINFOHEADER bmi;
- BYTE *buffer = 0;
- DWORD bufferSize;
- LONGLONG timeStamp;
-
- bmi.biSize = sizeof(BITMAPINFOHEADER);
-
- HRESULT hr = filterControl->GetCurrentImage(&bmi, &buffer, &bufferSize, &timeStamp);
- if (SUCCEEDED(hr)) {
-
- const int w = qAbs(bmi.biWidth),
- h = qAbs(bmi.biHeight);
-
- // Create image and copy data into image.
- QImage ret(w, h, QImage::Format_RGB32);
-
- if (!ret.isNull()) {
- uchar *data = buffer;
- const int bytes_per_line = w * sizeof(QRgb);
- for (int y = h - 1; y >= 0; --y) {
- qMemCopy(ret.scanLine(y), //destination
- data, //source
- bytes_per_line);
- data += bytes_per_line;
- }
- }
- ::CoTaskMemFree(buffer);
- return ret;
- }
- }
- return QImage();
- }
-
- QSize VideoRendererEVR::videoSize() const
- {
- SIZE nativeSize;
- SIZE aspectRatioSize;
-
- ComPointer<IMFVideoDisplayControl> filterControl = getService<IMFVideoDisplayControl>(m_filter, MR_VIDEO_RENDER_SERVICE, IID_IMFVideoDisplayControl);
-
- filterControl->GetNativeVideoSize(&nativeSize, &aspectRatioSize);
-
- return QSize(nativeSize.cx, nativeSize.cy);
- }
-
- void VideoRendererEVR::repaintCurrentFrame(QWidget *target, const QRect &rect)
- {
- // repaint the video
- ComPointer<IMFVideoDisplayControl> filterControl = getService<IMFVideoDisplayControl>(m_filter, MR_VIDEO_RENDER_SERVICE, IID_IMFVideoDisplayControl);
- // All failed results can be safely ignored
- filterControl->RepaintVideo();
- }
-
- void VideoRendererEVR::notifyResize(const QSize &size, Phonon::VideoWidget::AspectRatio aspectRatio,
- Phonon::VideoWidget::ScaleMode scaleMode)
- {
- if (!isActive()) {
- RECT dummyRect = { 0, 0, 0, 0};
- ComPointer<IMFVideoDisplayControl> filterControl = getService<IMFVideoDisplayControl>(m_filter, MR_VIDEO_RENDER_SERVICE, IID_IMFVideoDisplayControl);
- filterControl->SetVideoPosition(0, &dummyRect);
- return;
- }
-
- const QSize vsize = videoSize();
- internalNotifyResize(size, vsize, aspectRatio, scaleMode);
-
- RECT dstRectWin = { 0, 0, size.width(), size.height()};
-
- // Resize the Stream output rect instead of the destination rect.
- // Hacky workaround for flicker in the areas outside of the destination rect
- // This way these areas don't exist
- MFVideoNormalizedRect streamOutputRect = { float(m_dstX) / float(size.width()), float(m_dstY) / float(size.height()),
- float(m_dstWidth + m_dstX) / float(size.width()), float(m_dstHeight + m_dstY) / float(size.height())};
-
- ComPointer<IMFVideoMixerControl> filterMixer = getService<IMFVideoMixerControl>(m_filter, MR_VIDEO_MIXER_SERVICE, IID_IMFVideoMixerControl);
- ComPointer<IMFVideoDisplayControl> filterControl = getService<IMFVideoDisplayControl>(m_filter, MR_VIDEO_RENDER_SERVICE, IID_IMFVideoDisplayControl);
-
- filterMixer->SetStreamOutputRect(0, &streamOutputRect);
- filterControl->SetVideoPosition(0, &dstRectWin);
- }
-
- void VideoRendererEVR::applyMixerSettings(qreal brightness, qreal contrast, qreal hue, qreal saturation)
- {
- InputPin sink = BackendNode::pins(m_filter, PINDIR_INPUT).first();
- OutputPin source;
- if (FAILED(sink->ConnectedTo(source.pparam()))) {
- return; //it must be connected to work
- }
-
- // Get the "Video Processor" (used for brightness/contrast/saturation/hue)
- ComPointer<IMFVideoProcessor> processor = getService<IMFVideoProcessor>(m_filter, MR_VIDEO_MIXER_SERVICE, IID_IMFVideoProcessor);
- Q_ASSERT(processor);
-
- DXVA2_ValueRange contrastRange;
- DXVA2_ValueRange brightnessRange;
- DXVA2_ValueRange saturationRange;
- DXVA2_ValueRange hueRange;
-
- if (FAILED(processor->GetProcAmpRange(DXVA2_ProcAmp_Contrast, &contrastRange)))
- return;
- if (FAILED(processor->GetProcAmpRange(DXVA2_ProcAmp_Brightness, &brightnessRange)))
- return;
- if (FAILED(processor->GetProcAmpRange(DXVA2_ProcAmp_Saturation, &saturationRange)))
- return;
- if (FAILED(processor->GetProcAmpRange(DXVA2_ProcAmp_Hue, &hueRange)))
- return;
-
- DXVA2_ProcAmpValues values;
-
- values.Contrast = DXVA2FloatToFixed(((contrast < 0
- ? DXVA2FixedToFloat(contrastRange.MinValue) : DXVA2FixedToFloat(contrastRange.MaxValue))
- - DXVA2FixedToFloat(contrastRange.DefaultValue)) * qAbs(contrast) + DXVA2FixedToFloat(contrastRange.DefaultValue));
- values.Brightness = DXVA2FloatToFixed(((brightness < 0
- ? DXVA2FixedToFloat(brightnessRange.MinValue) : DXVA2FixedToFloat(brightnessRange.MaxValue))
- - DXVA2FixedToFloat(brightnessRange.DefaultValue)) * qAbs(brightness) + DXVA2FixedToFloat(brightnessRange.DefaultValue));
- values.Saturation = DXVA2FloatToFixed(((saturation < 0
- ? DXVA2FixedToFloat(saturationRange.MinValue) : DXVA2FixedToFloat(saturationRange.MaxValue))
- - DXVA2FixedToFloat(saturationRange.DefaultValue)) * qAbs(saturation) + DXVA2FixedToFloat(saturationRange.DefaultValue));
- values.Hue = DXVA2FloatToFixed(((hue < 0
- ? DXVA2FixedToFloat(hueRange.MinValue) : DXVA2FixedToFloat(hueRange.MaxValue))
- - DXVA2FixedToFloat(hueRange.DefaultValue)) * qAbs(hue) + DXVA2FixedToFloat(hueRange.DefaultValue));
-
- //finally set the settings
- processor->SetProcAmpValues(DXVA2_ProcAmp_Contrast | DXVA2_ProcAmp_Brightness | DXVA2_ProcAmp_Saturation | DXVA2_ProcAmp_Hue, &values);
-
- }
- }
-}
-
-QT_END_NAMESPACE
-
-#endif //QT_NO_PHONON_VIDEO
diff --git a/src/3rdparty/phonon/ds9/videorenderer_evr.h b/src/3rdparty/phonon/ds9/videorenderer_evr.h
deleted file mode 100644
index 229c36d..0000000
--- a/src/3rdparty/phonon/ds9/videorenderer_evr.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/* This file is part of the KDE project.
-
-Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-
-This library is free software: you can redistribute it and/or modify
-it under the terms of the GNU Lesser General Public License as published by
-the Free Software Foundation, either version 2.1 or 3 of the License.
-
-This library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU Lesser General Public License for more details.
-
-You should have received a copy of the GNU Lesser General Public License
-along with this library. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#ifndef PHONON_VIDEORENDERER_EVR_H
-#define PHONON_VIDEORENDERER_EVR_H
-
-#include "abstractvideorenderer.h"
-#include "compointer.h"
-
-QT_BEGIN_NAMESPACE
-
-#ifndef QT_NO_PHONON_VIDEO
-
-namespace Phonon
-{
- namespace DS9
- {
- class VideoRendererEVR : public AbstractVideoRenderer
- {
- public:
- VideoRendererEVR(QWidget *target);
- ~VideoRendererEVR();
-
- //Implementation from AbstractVideoRenderer
- void repaintCurrentFrame(QWidget *target, const QRect &rect);
- void notifyResize(const QSize&, Phonon::VideoWidget::AspectRatio, Phonon::VideoWidget::ScaleMode);
- QSize videoSize() const;
- QImage snapshot() const;
- void applyMixerSettings(qreal brightness, qreal contrast, qreal m_hue, qreal saturation);
- bool isNative() const;
- private:
- QWidget *m_target;
- };
- }
-}
-
-#endif //QT_NO_PHONON_VIDEO
-
-QT_END_NAMESPACE
-
-#endif
-
diff --git a/src/3rdparty/phonon/ds9/videowidget.cpp b/src/3rdparty/phonon/ds9/videowidget.cpp
index 09d42a4..057d905 100644
--- a/src/3rdparty/phonon/ds9/videowidget.cpp
+++ b/src/3rdparty/phonon/ds9/videowidget.cpp
@@ -25,7 +25,6 @@ along with this library. If not, see <http://www.gnu.org/licenses/>.
#include "mediaobject.h"

#ifndef Q_OS_WINCE
-#include "videorenderer_evr.h"
#include "videorenderer_vmr9.h"
#else
#include "videorenderer_default.h"
@@ -359,17 +358,12 @@ namespace Phonon
AbstractVideoRenderer *renderer = 0;
if (type == Native) {
#ifndef Q_OS_WINCE
- renderer = new VideoRendererEVR(m_widget);
+ renderer = new VideoRendererVMR9(m_widget);
if (renderer->getFilter() == 0) {
+ //instanciating the renderer might fail with error VFW_E_DDRAW_CAPS_NOT_SUITABLE (0x80040273)
+ m_noNativeRendererSupported = true;
delete renderer;
- //EVR not present, let's try VMR
- renderer = new VideoRendererVMR9(m_widget);
- if (renderer->getFilter() == 0) {
- //instanciating the renderer might fail
- m_noNativeRendererSupported = true;
- delete renderer;
- renderer = 0;
- }
+ renderer = 0;
}
#else
renderer = new VideoRendererDefault(m_widget);
diff --git a/src/plugins/phonon/ds9/ds9.pro b/src/plugins/phonon/ds9/ds9.pro
index 301808e..496c21c 100644
--- a/src/plugins/phonon/ds9/ds9.pro
+++ b/src/plugins/phonon/ds9/ds9.pro
@@ -52,10 +52,8 @@ SOURCES += /
$$PHONON_DS9_DIR/qmeminputpin.cpp

#the EVR renderer (only available on desktop)
-!wince*:SOURCES += $$PHONON_DS9_DIR/videorenderer_evr.cpp /
- $$PHONON_DS9_DIR/videorenderer_vmr9.cpp
+!wince*:SOURCES += $$PHONON_DS9_DIR/videorenderer_vmr9.cpp
!wince*:HEADERS += $$PHONON_DS9_DIR/qevr9.h /
- $$PHONON_DS9_DIR/videorenderer_evr.h /
$$PHONON_DS9_DIR/videorenderer_vmr9.h
wince*:SOURCES += $$PHONON_DS9_DIR/videorenderer_default.cpp
wince*:HEADERS += $$PHONON_DS9_DIR/videorenderer_default.h
--
1.7.0.2.msysgit.0