summaryrefslogtreecommitdiffstats
path: root/src/plugins/directshow/camera/dscamerasession.h
blob: 619a006fa7c044eb0c5d4617c97db6bd07365891 (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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
/****************************************************************************
**
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef DSCAMERASESSION_H
#define DSCAMERASESSION_H

#include <QtCore/qobject.h>
#include <QTime>
#include <QUrl>
#include <QMutex>

#include <qcamera.h>
#include <QtMultimedia/qvideoframe.h>
#include <QtMultimedia/qabstractvideosurface.h>
#include <QtMultimedia/qvideosurfaceformat.h>
#include <QtMultimedia/qcameraimageprocessingcontrol.h>
#include <private/qmediastoragelocation_p.h>

#include <tchar.h>
#include <dshow.h>
#include <objbase.h>
#include <initguid.h>
#ifdef Q_CC_MSVC
#  pragma comment(lib, "strmiids.lib")
#  pragma comment(lib, "ole32.lib")
#endif // Q_CC_MSVC
#include <windows.h>

#ifdef Q_CC_MSVC
#  pragma include_alias("dxtrans.h","qedit.h")
#endif // Q_CC_MSVC
#define __IDxtCompositor_INTERFACE_DEFINED__
#define __IDxtAlphaSetter_INTERFACE_DEFINED__
#define __IDxtJpeg_INTERFACE_DEFINED__
#define __IDxtKey_INTERFACE_DEFINED__

struct ICaptureGraphBuilder2;
struct ISampleGrabber;

QT_BEGIN_NAMESPACE

class SampleGrabberCallbackPrivate;

class DSCameraSession : public QObject
{
    Q_OBJECT
public:
    DSCameraSession(QObject *parent = 0);
    ~DSCameraSession();

    QCamera::Status status() const { return m_status; }

    void setDevice(const QString &device);

    bool load();
    bool unload();
    bool startPreview();
    bool stopPreview();

    bool isReadyForCapture();
    int captureImage(const QString &fileName);

    void setSurface(QAbstractVideoSurface* surface);

    QCameraViewfinderSettings viewfinderSettings() const;
    void setViewfinderSettings(const QCameraViewfinderSettings &settings);

    QList<QCameraViewfinderSettings> supportedViewfinderSettings() const
    { return m_supportedViewfinderSettings; }

    bool isImageProcessingParameterSupported(
            QCameraImageProcessingControl::ProcessingParameter) const;

    bool isImageProcessingParameterValueSupported(
            QCameraImageProcessingControl::ProcessingParameter,
            const QVariant &) const;

    QVariant imageProcessingParameter(
            QCameraImageProcessingControl::ProcessingParameter) const;

    void setImageProcessingParameter(
            QCameraImageProcessingControl::ProcessingParameter,
            const QVariant &);

Q_SIGNALS:
    void statusChanged(QCamera::Status);
    void imageExposed(int id);
    void imageCaptured(int id, const QImage &preview);
    void imageSaved(int id, const QString &fileName);
    void readyForCaptureChanged(bool);
    void captureError(int id, int error, const QString &errorString);

private Q_SLOTS:
    void presentFrame();
    void updateReadyForCapture();

private:
    struct ImageProcessingParameterInfo {
        ImageProcessingParameterInfo()
            : minimumValue(0)
            , maximumValue(0)
            , defaultValue(0)
            , currentValue(0)
            , capsFlags(0)
            , hasBeenExplicitlySet(false)
            , videoProcAmpProperty(VideoProcAmp_Brightness)
        {
        }

        LONG minimumValue;
        LONG maximumValue;
        LONG defaultValue;
        LONG currentValue;
        LONG capsFlags;
        bool hasBeenExplicitlySet;
        VideoProcAmpProperty videoProcAmpProperty;
    };

    void setStatus(QCamera::Status status);

    void onFrameAvailable(const char *frameData, long len);
    void saveCapturedImage(int id, const QImage &image, const QString &path);

    bool createFilterGraph();
    bool connectGraph();
    void disconnectGraph();
    void updateSourceCapabilities();
    bool configurePreviewFormat();
    void updateImageProcessingParametersInfos();

    // These static functions are used for scaling of adjustable parameters,
    // which have the ranges from -1.0 to +1.0 in the QCameraImageProcessing API.
    static qreal scaledImageProcessingParameterValue(
            qint32 sourceValue, const ImageProcessingParameterInfo &sourceValueInfo);
    static qint32 sourceImageProcessingParameterValue(
            qreal scaledValue, const ImageProcessingParameterInfo &sourceValueInfo);

    QMutex m_presentMutex;
    QMutex m_captureMutex;

    // Capture Graph
    ICaptureGraphBuilder2* m_graphBuilder;
    IGraphBuilder* m_filterGraph;

    // Source (camera)
    QString m_sourceDeviceName;
    IBaseFilter* m_sourceFilter;
    bool m_needsHorizontalMirroring;
    QList<AM_MEDIA_TYPE> m_supportedFormats;
    QList<QCameraViewfinderSettings> m_supportedViewfinderSettings;
    AM_MEDIA_TYPE m_sourceFormat;
    QMap<QCameraImageProcessingControl::ProcessingParameter, ImageProcessingParameterInfo> m_imageProcessingParametersInfos;

    // Preview
    IBaseFilter *m_previewFilter;
    ISampleGrabber *m_previewSampleGrabber;
    IBaseFilter *m_nullRendererFilter;
    QVideoFrame m_currentFrame;
    bool m_previewStarted;
    QAbstractVideoSurface* m_surface;
    QVideoSurfaceFormat m_previewSurfaceFormat;
    QVideoFrame::PixelFormat m_previewPixelFormat;
    QSize m_previewSize;
    QCameraViewfinderSettings m_viewfinderSettings;
    QCameraViewfinderSettings m_actualViewfinderSettings;

    // Image capture
    QString m_imageCaptureFileName;
    QMediaStorageLocation m_fileNameGenerator;
    bool m_readyForCapture;
    int m_imageIdCounter;
    int m_currentImageId;
    QVideoFrame m_capturedFrame;

    // Internal state
    QCamera::Status m_status;

    friend class SampleGrabberCallbackPrivate;
};

QT_END_NAMESPACE


#endif