Initial copy of QtMultimediaKit.

Comes from original repo, with SHA1: 2c82d5611655e5967f5c5095af50c0991c4378b2
2011-06-29 13:38:46 +10:00
commit 2a34e88c1e
1048 changed files with 206259 additions and 0 deletions
--- a/src/plugins/gstreamer/mediacapture/qgstreamercameracontrol.cpp
+++ b/src/plugins/gstreamer/mediacapture/qgstreamercameracontrol.cpp
@@ -0,0 +1,185 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgstreamercameracontrol.h"
+#include "qgstreamerimageencode.h"
+
+#include <QtCore/qdebug.h>
+#include <QtCore/qfile.h>
+
+
+QGstreamerCameraControl::QGstreamerCameraControl(QGstreamerCaptureSession *session)
+    :QCameraControl(session),
+    m_captureMode(QCamera::CaptureStillImage),
+    m_session(session),
+    m_state(QCamera::UnloadedState),
+    m_status(QCamera::UnloadedStatus),
+    m_reloadPending(false)
+
+{
+    connect(m_session, SIGNAL(stateChanged(QGstreamerCaptureSession::State)),
+            this, SLOT(updateStatus()));
+
+    connect(m_session->imageEncodeControl(), SIGNAL(settingsChanged()),
+            SLOT(reloadLater()));
+    connect(m_session, SIGNAL(viewfinderChanged()),
+            SLOT(reloadLater()));
+    connect(m_session, SIGNAL(readyChanged(bool)),
+            SLOT(reloadLater()));
+}
+
+QGstreamerCameraControl::~QGstreamerCameraControl()
+{
+}
+
+void QGstreamerCameraControl::setCaptureMode(QCamera::CaptureMode mode)
+{
+    if (m_captureMode == mode)
+        return;
+
+    switch (mode) {
+    case QCamera::CaptureStillImage:
+        m_session->setCaptureMode(QGstreamerCaptureSession::Image);
+        break;
+    case QCamera::CaptureVideo:
+        m_session->setCaptureMode(QGstreamerCaptureSession::AudioAndVideo);
+        break;
+    }
+
+    emit captureModeChanged(mode);
+    updateStatus();
+    reloadLater();
+}
+
+void QGstreamerCameraControl::setState(QCamera::State state)
+{
+    if (m_state == state)
+        return;
+
+    m_state = state;
+    switch (state) {
+    case QCamera::UnloadedState:
+    case QCamera::LoadedState:
+        m_session->setState(QGstreamerCaptureSession::StoppedState);
+        break;
+    case QCamera::ActiveState:
+        //postpone changing to Active if the session is nor ready yet
+        if (m_session->isReady()) {
+            m_session->setState(QGstreamerCaptureSession::PreviewState);
+        } else {
+#ifdef CAMEABIN_DEBUG
+            qDebug() << "Camera session is not ready yet, postpone activating";
+#endif
+        }
+        break;
+    default:
+        emit error(QCamera::NotSupportedFeatureError, tr("State not supported."));
+    }
+
+    updateStatus();
+    emit stateChanged(m_state);
+}
+
+QCamera::State QGstreamerCameraControl::state() const
+{
+    return m_state;
+}
+
+void QGstreamerCameraControl::updateStatus()
+{
+    QCamera::Status oldStatus = m_status;
+
+    switch (m_state) {
+    case QCamera::UnloadedState:
+        m_status = QCamera::UnloadedStatus;
+        break;
+    case QCamera::LoadedState:
+        m_status = QCamera::LoadedStatus;
+        break;
+    case QCamera::ActiveState:
+        if (m_session->state() == QGstreamerCaptureSession::StoppedState)
+            m_status = QCamera::StartingStatus;
+        else
+            m_status = QCamera::ActiveStatus;
+        break;
+    }
+
+    if (oldStatus != m_status) {
+        //qDebug() << "Status changed:" << m_status;
+        emit statusChanged(m_status);
+    }
+}
+
+void QGstreamerCameraControl::reloadLater()
+{
+    //qDebug() << "reload pipeline requested";
+    if (!m_reloadPending && m_state == QCamera::ActiveState) {
+        m_reloadPending = true;
+        m_session->setState(QGstreamerCaptureSession::StoppedState);
+        QMetaObject::invokeMethod(this, "reloadPipeline", Qt::QueuedConnection);
+    }
+}
+
+void QGstreamerCameraControl::reloadPipeline()
+{
+    //qDebug() << "reload pipeline";
+    if (m_reloadPending) {
+        m_reloadPending = false;
+        if (m_state == QCamera::ActiveState && m_session->isReady()) {
+            m_session->setState(QGstreamerCaptureSession::PreviewState);
+        }
+    }
+}
+
+bool QGstreamerCameraControl::canChangeProperty(PropertyChangeType changeType, QCamera::Status status) const
+{
+    Q_UNUSED(status);
+
+    switch (changeType) {
+    case QCameraControl::CaptureMode:
+    case QCameraControl::ImageEncodingSettings:
+    case QCameraControl::VideoEncodingSettings:
+    case QCameraControl::Viewfinder:
+        return true;
+    default:
+        return false;
+    }
+}