From f6082d46326055712fe772d1973b2de94f028a08 Mon Sep 17 00:00:00 2001
From: Samuel Nevala <samuel.nevala@intopalo.com>
Date: Fri, 25 Sep 2015 14:54:30 +0300
Subject: winrt: Fix Lumia 1520 black viewfinder.

The latest Denim update broke VideoProcessorBlt for Lumia 1520. After
the update, the blit results in a black target texture. As a
workaround, don't use DirectVideo, but leave format conversion and
drawing to the EGL Node.

Task-Id: QTBUG-48331
Change-Id: I1dab6b58d52d0e24fbffb91f23772906a576047a
Reviewed-by: Andrew Knight <andrew.knight@intopalo.com>
---
 .../winrt/qwinrtcameravideorenderercontrol.cpp     | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'src/plugins')

diff --git a/src/plugins/winrt/qwinrtcameravideorenderercontrol.cpp b/src/plugins/winrt/qwinrtcameravideorenderercontrol.cpp
index 177d05ebe..7afef7669 100644
--- a/src/plugins/winrt/qwinrtcameravideorenderercontrol.cpp
+++ b/src/plugins/winrt/qwinrtcameravideorenderercontrol.cpp
@@ -44,10 +44,27 @@
 #include <d3d11.h>
 #include <mfapi.h>
 #include <wrl.h>
+
+#ifdef Q_OS_WINPHONE
+#include <Windows.Security.ExchangeActiveSyncProvisioning.h>
+using namespace ABI::Windows::Security::ExchangeActiveSyncProvisioning;
+#endif
+
 using namespace Microsoft::WRL;
+using namespace Microsoft::WRL::Wrappers;
 
 QT_BEGIN_NAMESPACE
 
+#ifdef Q_OS_WINPHONE
+template <int n>
+static bool blacklisted(const wchar_t (&blackListName)[n], const HString &deviceModel)
+{
+    quint32 deviceNameLength;
+    const wchar_t *deviceName = deviceModel.GetRawBuffer(&deviceNameLength);
+    return n - 1 <= deviceNameLength && !wmemcmp(blackListName, deviceName, n - 1);
+}
+#endif
+
 class QWinRTCameraVideoBuffer : public QAbstractVideoBuffer
 {
 public:
@@ -255,6 +272,19 @@ QWinRTCameraVideoRendererControl::QWinRTCameraVideoRendererControl(const QSize &
     Q_D(QWinRTCameraVideoRendererControl);
     d->cameraSampleformat = QVideoFrame::Format_User;
     d->videoProbesCounter = 0;
+
+#ifdef Q_OS_WINPHONE
+    // Workaround for certain devices which fail to blit.
+    ComPtr<IEasClientDeviceInformation> deviceInfo;
+    HRESULT hr = RoActivateInstance(HString::MakeReference(RuntimeClass_Windows_Security_ExchangeActiveSyncProvisioning_EasClientDeviceInformation).Get(),
+                                    &deviceInfo);
+    Q_ASSERT_SUCCEEDED(hr);
+    HString deviceModel;
+    hr = deviceInfo->get_SystemProductName(deviceModel.GetAddressOf());
+    Q_ASSERT_SUCCEEDED(hr);
+    // Blacklist Lumia 1520
+    setBlitMode(blacklisted(L"RM-937", deviceModel) ? MediaFoundation : DirectVideo);
+#endif
 }
 
 QWinRTCameraVideoRendererControl::~QWinRTCameraVideoRendererControl()
-- 
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