AVFoundation: re-apply viewfinder settings on mode changes.

Since the active viewfinder resolution can be overridden by the image
and video capture resolutions, we need to re-evaluate the viewfinder
settings whenever the capture mode changes.

Change-Id: Ibdb7a070585cf67ebb2fcfb95ccbdd105f5f41cf
Reviewed-by: Christian Stromme <christian.stromme@qt.io>

src/plugins/avfoundation/camera/avfcameracontrol.mm

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2015 The Qt Company Ltd and/or its subsidiary(-ies).
+** Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies).
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the Qt Toolkit.
@@ -47,6 +47,7 @@ AVFCameraControl::AVFCameraControl(AVFCameraService *service, QObject *parent)
 {
     Q_UNUSED(service);
     connect(m_session, SIGNAL(stateChanged(QCamera::State)), SLOT(updateStatus()));
+    connect(this, &AVFCameraControl::captureModeChanged, m_session, &AVFCameraSession::onCaptureModeChanged);
 }
 
 AVFCameraControl::~AVFCameraControl()

src/plugins/avfoundation/camera/avfcamerasession.h

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2015 The Qt Company Ltd.
+** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the Qt Toolkit.
@@ -93,6 +93,8 @@ public Q_SLOTS:
     void processSessionStarted();
     void processSessionStopped();
 
+    void onCaptureModeChanged(QCamera::CaptureModes mode);
+
     void onCameraFrameFetched(const QVideoFrame &frame);
 
 Q_SIGNALS:

src/plugins/avfoundation/camera/avfcamerasession.mm

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2015 The Qt Company Ltd and/or its subsidiary(-ies).
+** Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies).
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the Qt Toolkit.
@@ -286,8 +286,8 @@ void AVFCameraSession::setState(QCamera::State newState)
         m_defaultCodec = 0;
         defaultCodec();
 
-        bool activeFormatSet = applyImageEncoderSettings();
-        activeFormatSet |= applyViewfinderSettings();
+        bool activeFormatSet = applyImageEncoderSettings()
+                             | applyViewfinderSettings();
 
         [m_captureSession commitConfiguration];
 
@@ -338,6 +338,17 @@ void AVFCameraSession::processSessionStopped()
     }
 }
 
+void AVFCameraSession::onCaptureModeChanged(QCamera::CaptureModes mode)
+{
+    Q_UNUSED(mode)
+
+    const QCamera::State s = state();
+    if (s == QCamera::LoadedState || s == QCamera::ActiveState) {
+        applyImageEncoderSettings();
+        applyViewfinderSettings();
+    }
+}
+
 void AVFCameraSession::attachVideoInputDevice()
 {
     //Attach video input device:
@@ -381,11 +392,12 @@ bool AVFCameraSession::applyImageEncoderSettings()
 bool AVFCameraSession::applyViewfinderSettings()
 {
     if (AVFCameraViewfinderSettingsControl2 *vfControl = m_service->viewfinderSettingsControl2()) {
+        QCamera::CaptureModes currentMode = m_service->cameraControl()->captureMode();
         QCameraViewfinderSettings vfSettings(vfControl->requestedSettings());
         // Viewfinder and image capture solutions must be the same, if an image capture
         // resolution is set, it takes precedence over the viewfinder resolution.
-        if (AVFImageEncoderControl *imControl = m_service->imageEncoderControl()) {
-            const QSize imageResolution(imControl->requestedSettings().resolution());
+        if (currentMode.testFlag(QCamera::CaptureStillImage)) {
+            const QSize imageResolution(m_service->imageEncoderControl()->requestedSettings().resolution());
             if (!imageResolution.isNull() && imageResolution.isValid())
                 vfSettings.setResolution(imageResolution);
         }

src/plugins/avfoundation/camera/avfimagecapturecontrol.mm

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2015 The Qt Company Ltd and/or its subsidiary(-ies).
+** Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies).
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the Qt Toolkit.
@@ -67,6 +67,7 @@ AVFImageCaptureControl::AVFImageCaptureControl(AVFCameraService *service, QObjec
     connect(m_cameraControl, SIGNAL(statusChanged(QCamera::Status)), SLOT(updateReadyStatus()));
 
     connect(m_session, SIGNAL(readyToConfigureConnections()), SLOT(updateCaptureConnection()));
+    connect(m_cameraControl, SIGNAL(captureModeChanged(QCamera::CaptureModes)), SLOT(updateCaptureConnection()));
 
     connect(m_session, &AVFCameraSession::newViewfinderFrame,
             this, &AVFImageCaptureControl::onNewViewfinderFrame,

src/plugins/avfoundation/camera/avfimageencodercontrol.mm

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2015 The Qt Company Ltd.
+** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the Qt Toolkit.
@@ -38,6 +38,7 @@
 #include "avfcamerasession.h"
 #include "avfcameraservice.h"
 #include "avfcameradebug.h"
+#include "avfcameracontrol.h"
 
 #include <QtMultimedia/qmediaencodersettings.h>
 
@@ -182,7 +183,8 @@ bool AVFImageEncoderControl::applySettings()
 
     AVFCameraSession *session = m_service->session();
     if (!session || (session->state() != QCamera::ActiveState
-        && session->state() != QCamera::LoadedState)) {
+        && session->state() != QCamera::LoadedState)
+            || !m_service->cameraControl()->captureMode().testFlag(QCamera::CaptureStillImage)) {
         return false;
     }