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39
40#include "qgstreamerimagecapturecontrol.h"
41#include <QtCore/QDebug>
42#include <QtCore/QDir>
43
44QGstreamerImageCaptureControl::QGstreamerImageCaptureControl(QGstreamerCaptureSession *session)
45 :QCameraImageCaptureControl(session), m_session(session), m_ready(false), m_lastId(0)
46{
47 connect(asender: m_session, SIGNAL(stateChanged(QGstreamerCaptureSession::State)), SLOT(updateState()));
48 connect(sender: m_session, SIGNAL(imageExposed(int)), receiver: this, SIGNAL(imageExposed(int)));
49 connect(sender: m_session, SIGNAL(imageCaptured(int,QImage)), receiver: this, SIGNAL(imageCaptured(int,QImage)));
50 connect(sender: m_session, SIGNAL(imageSaved(int,QString)), receiver: this, SIGNAL(imageSaved(int,QString)));
51}
52
53QGstreamerImageCaptureControl::~QGstreamerImageCaptureControl()
54{
55}
56
57bool QGstreamerImageCaptureControl::isReadyForCapture() const
58{
59 return m_ready;
60}
61
62int QGstreamerImageCaptureControl::capture(const QString &fileName)
63{
64 m_lastId++;
65
66 //it's allowed to request image capture while camera is starting
67 if (m_session->pendingState() == QGstreamerCaptureSession::StoppedState ||
68 !(m_session->captureMode() & QGstreamerCaptureSession::Image)) {
69 //emit error in the next event loop,
70 //so application can associate it with returned request id.
71 QMetaObject::invokeMethod(obj: this, member: "error", type: Qt::QueuedConnection,
72 Q_ARG(int, m_lastId),
73 Q_ARG(int, QCameraImageCapture::NotReadyError),
74 Q_ARG(QString,tr("Not ready to capture")));
75
76 return m_lastId;
77 }
78
79 QString path = fileName;
80 if (path.isEmpty()) {
81 int lastImage = 0;
82 QDir outputDir = QDir::currentPath();
83 const auto list = outputDir.entryList(nameFilters: QStringList() << "img_*.jpg");
84 for (const QString &fileName : list) {
85 int imgNumber = fileName.midRef(position: 4, n: fileName.size()-8).toInt();
86 lastImage = qMax(a: lastImage, b: imgNumber);
87 }
88
89 path = QString("img_%1.jpg").arg(a: lastImage+1,
90 fieldWidth: 4, //fieldWidth
91 base: 10,
92 fillChar: QLatin1Char('0'));
93 }
94
95 m_session->captureImage(requestId: m_lastId, fileName: path);
96
97 return m_lastId;
98}
99
100void QGstreamerImageCaptureControl::cancelCapture()
101{
102
103}
104
105void QGstreamerImageCaptureControl::updateState()
106{
107 bool ready = (m_session->state() == QGstreamerCaptureSession::PreviewState) &&
108 (m_session->captureMode() & QGstreamerCaptureSession::Image);
109
110 if (m_ready != ready) {
111 emit readyForCaptureChanged(ready: m_ready = ready);
112 }
113}
114

source code of qtmultimedia/src/plugins/gstreamer/mediacapture/qgstreamerimagecapturecontrol.cpp