1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
/****************************************************************************
**
** 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 "qandroidcamerazoomcontrol.h"
#include "qandroidcamerasession.h"
#include "androidcamera.h"
#include "qandroidmultimediautils.h"
#include <qmath.h>
QT_BEGIN_NAMESPACE
QAndroidCameraZoomControl::QAndroidCameraZoomControl(QAndroidCameraSession *session)
: QCameraZoomControl()
, m_cameraSession(session)
, m_maximumZoom(1.0)
, m_requestedZoom(1.0)
, m_currentZoom(1.0)
{
connect(m_cameraSession, SIGNAL(opened()),
this, SLOT(onCameraOpened()));
}
qreal QAndroidCameraZoomControl::maximumOpticalZoom() const
{
// Optical zoom not supported
return 1.0;
}
qreal QAndroidCameraZoomControl::maximumDigitalZoom() const
{
return m_maximumZoom;
}
qreal QAndroidCameraZoomControl::requestedOpticalZoom() const
{
// Optical zoom not supported
return 1.0;
}
qreal QAndroidCameraZoomControl::requestedDigitalZoom() const
{
return m_requestedZoom;
}
qreal QAndroidCameraZoomControl::currentOpticalZoom() const
{
// Optical zoom not supported
return 1.0;
}
qreal QAndroidCameraZoomControl::currentDigitalZoom() const
{
return m_currentZoom;
}
void QAndroidCameraZoomControl::zoomTo(qreal optical, qreal digital)
{
Q_UNUSED(optical);
if (!qFuzzyCompare(m_requestedZoom, digital)) {
m_requestedZoom = digital;
emit requestedDigitalZoomChanged(m_requestedZoom);
}
if (m_cameraSession->camera()) {
digital = qBound(qreal(1), digital, m_maximumZoom);
int validZoomIndex = qt_findClosestValue(m_zoomRatios, qRound(digital * 100));
qreal newZoom = m_zoomRatios.at(validZoomIndex) / qreal(100);
if (!qFuzzyCompare(m_currentZoom, newZoom)) {
m_cameraSession->camera()->setZoom(validZoomIndex);
m_currentZoom = newZoom;
emit currentDigitalZoomChanged(m_currentZoom);
}
}
}
void QAndroidCameraZoomControl::onCameraOpened()
{
if (m_cameraSession->camera()->isZoomSupported()) {
m_zoomRatios = m_cameraSession->camera()->getZoomRatios();
qreal maxZoom = m_zoomRatios.last() / qreal(100);
if (m_maximumZoom != maxZoom) {
m_maximumZoom = maxZoom;
emit maximumDigitalZoomChanged(m_maximumZoom);
}
zoomTo(1, m_requestedZoom);
} else {
m_zoomRatios.clear();
if (!qFuzzyCompare(m_maximumZoom, qreal(1))) {
m_maximumZoom = 1.0;
emit maximumDigitalZoomChanged(m_maximumZoom);
}
}
}
QT_END_NAMESPACE
|
