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39
40 #include "qandroidcamerazoomcontrol.h"
41
42 #include "qandroidcamerasession.h"
43 #include "androidcamera.h"
44 #include "qandroidmultimediautils.h"
45 #include <qmath.h>
46
47 QT_BEGIN_NAMESPACE
48
QAndroidCameraZoomControl(QAndroidCameraSession * session)49 QAndroidCameraZoomControl::QAndroidCameraZoomControl(QAndroidCameraSession *session)
50 : QCameraZoomControl()
51 , m_cameraSession(session)
52 , m_maximumZoom(1.0)
53 , m_requestedZoom(1.0)
54 , m_currentZoom(1.0)
55 {
56 connect(m_cameraSession, SIGNAL(opened()),
57 this, SLOT(onCameraOpened()));
58 }
59
maximumOpticalZoom() const60 qreal QAndroidCameraZoomControl::maximumOpticalZoom() const
61 {
62 // Optical zoom not supported
63 return 1.0;
64 }
65
maximumDigitalZoom() const66 qreal QAndroidCameraZoomControl::maximumDigitalZoom() const
67 {
68 return m_maximumZoom;
69 }
70
requestedOpticalZoom() const71 qreal QAndroidCameraZoomControl::requestedOpticalZoom() const
72 {
73 // Optical zoom not supported
74 return 1.0;
75 }
76
requestedDigitalZoom() const77 qreal QAndroidCameraZoomControl::requestedDigitalZoom() const
78 {
79 return m_requestedZoom;
80 }
81
currentOpticalZoom() const82 qreal QAndroidCameraZoomControl::currentOpticalZoom() const
83 {
84 // Optical zoom not supported
85 return 1.0;
86 }
87
currentDigitalZoom() const88 qreal QAndroidCameraZoomControl::currentDigitalZoom() const
89 {
90 return m_currentZoom;
91 }
92
zoomTo(qreal optical,qreal digital)93 void QAndroidCameraZoomControl::zoomTo(qreal optical, qreal digital)
94 {
95 Q_UNUSED(optical);
96
97 if (!qFuzzyCompare(m_requestedZoom, digital)) {
98 m_requestedZoom = digital;
99 emit requestedDigitalZoomChanged(m_requestedZoom);
100 }
101
102 if (m_cameraSession->camera()) {
103 digital = qBound(qreal(1), digital, m_maximumZoom);
104 int validZoomIndex = qt_findClosestValue(m_zoomRatios, qRound(digital * 100));
105 qreal newZoom = m_zoomRatios.at(validZoomIndex) / qreal(100);
106 if (!qFuzzyCompare(m_currentZoom, newZoom)) {
107 m_cameraSession->camera()->setZoom(validZoomIndex);
108 m_currentZoom = newZoom;
109 emit currentDigitalZoomChanged(m_currentZoom);
110 }
111 }
112 }
113
onCameraOpened()114 void QAndroidCameraZoomControl::onCameraOpened()
115 {
116 if (m_cameraSession->camera()->isZoomSupported()) {
117 m_zoomRatios = m_cameraSession->camera()->getZoomRatios();
118 qreal maxZoom = m_zoomRatios.last() / qreal(100);
119 if (m_maximumZoom != maxZoom) {
120 m_maximumZoom = maxZoom;
121 emit maximumDigitalZoomChanged(m_maximumZoom);
122 }
123 zoomTo(1, m_requestedZoom);
124 } else {
125 m_zoomRatios.clear();
126 if (!qFuzzyCompare(m_maximumZoom, qreal(1))) {
127 m_maximumZoom = 1.0;
128 emit maximumDigitalZoomChanged(m_maximumZoom);
129 }
130 }
131 }
132
133 QT_END_NAMESPACE
134