summaryrefslogtreecommitdiffstats
path: root/src/plugins/avfoundation/camera/avfcamerautility.h
blob: 33956fc8afbf11b4c61a8c2527f95f4583772c6f (plain)
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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef AVFCAMERAUTILITY_H
#define AVFCAMERAUTILITY_H

#include <QtCore/qglobal.h>
#include <QtCore/qvector.h>
#include <QtCore/qdebug.h>
#include <QtCore/qsize.h>
#include <QtCore/qpair.h>

#include <AVFoundation/AVFoundation.h>

// In case we have SDK below 10.7/7.0:
@class AVCaptureDeviceFormat;

QT_BEGIN_NAMESPACE

class AVFConfigurationLock
{
public:
    explicit AVFConfigurationLock(AVCaptureDevice *captureDevice)
        : m_captureDevice(captureDevice),
          m_locked(false)
    {
        Q_ASSERT(m_captureDevice);
        NSError *error = nil;
        m_locked = [m_captureDevice lockForConfiguration:&error];
    }

    ~AVFConfigurationLock()
    {
        if (m_locked)
            [m_captureDevice unlockForConfiguration];
    }

    operator bool() const
    {
        return m_locked;
    }

private:
    Q_DISABLE_COPY(AVFConfigurationLock)

    AVCaptureDevice *m_captureDevice;
    bool m_locked;
};

struct AVFObjectDeleter {
    static void cleanup(NSObject *obj)
    {
        if (obj)
            [obj release];
    }
};

template<class T>
class AVFScopedPointer : public QScopedPointer<NSObject, AVFObjectDeleter>
{
public:
    AVFScopedPointer() {}
    explicit AVFScopedPointer(T *ptr) : QScopedPointer(ptr) {}
    operator T*() const
    {
        // Quite handy operator to enable Obj-C messages: [ptr someMethod];
        return data();
    }

    T *data() const
    {
        return static_cast<T *>(QScopedPointer::data());
    }

    T *take()
    {
        return static_cast<T *>(QScopedPointer::take());
    }
};

template<>
class AVFScopedPointer<dispatch_queue_t>
{
public:
    AVFScopedPointer() : m_queue(nullptr) {}
    explicit AVFScopedPointer(dispatch_queue_t q) : m_queue(q) {}

    ~AVFScopedPointer()
    {
        if (m_queue)
            dispatch_release(m_queue);
    }

    operator dispatch_queue_t() const
    {
        // Quite handy operator to enable Obj-C messages: [ptr someMethod];
        return m_queue;
    }

    dispatch_queue_t data() const
    {
        return m_queue;
    }

    void reset(dispatch_queue_t q = nullptr)
    {
        if (m_queue)
            dispatch_release(m_queue);
        m_queue = q;
    }

private:
    dispatch_queue_t m_queue;

    Q_DISABLE_COPY(AVFScopedPointer)
};

typedef QPair<qreal, qreal> AVFPSRange;
AVFPSRange qt_connection_framerates(AVCaptureConnection *videoConnection);

QVector<AVCaptureDeviceFormat *> qt_unique_device_formats(AVCaptureDevice *captureDevice,
                                                          FourCharCode preferredFormat);
QSize qt_device_format_resolution(AVCaptureDeviceFormat *format);
QSize qt_device_format_high_resolution(AVCaptureDeviceFormat *format);
QSize qt_device_format_pixel_aspect_ratio(AVCaptureDeviceFormat *format);
QVector<AVFPSRange> qt_device_format_framerates(AVCaptureDeviceFormat *format);
AVCaptureDeviceFormat *qt_find_best_resolution_match(AVCaptureDevice *captureDevice, const QSize &res,
                                                     FourCharCode preferredFormat, bool stillImage = true);
AVCaptureDeviceFormat *qt_find_best_framerate_match(AVCaptureDevice *captureDevice,
                                                    FourCharCode preferredFormat,
                                                    Float64 fps);
AVFrameRateRange *qt_find_supported_framerate_range(AVCaptureDeviceFormat *format, Float64 fps);

bool qt_formats_are_equal(AVCaptureDeviceFormat *f1, AVCaptureDeviceFormat *f2);
bool qt_set_active_format(AVCaptureDevice *captureDevice, AVCaptureDeviceFormat *format, bool preserveFps);

AVFPSRange qt_current_framerates(AVCaptureDevice *captureDevice, AVCaptureConnection *videoConnection);
void qt_set_framerate_limits(AVCaptureDevice *captureDevice, AVCaptureConnection *videoConnection,
                             qreal minFPS, qreal maxFPS);

QT_END_NAMESPACE

#endif