1 files changed, 356 insertions, 0 deletions
diff --git a/src/plugins/gstreamer/camerabin/camerabincontrol.cpp b/src/plugins/gstreamer/camerabin/camerabincontrol.cpp
new file mode 100644
index 000000000..2c30fd656
--- /dev/null
+++ b/src/plugins/gstreamer/camerabin/camerabincontrol.cpp
@@ -0,0 +1,356 @@
+/****************************************************************************
+**
+** 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 "camerabincontrol.h"
+#include "camerabincontainer.h"
+#include "camerabinaudioencoder.h"
+#include "camerabinvideoencoder.h"
+#include "camerabinimageencoder.h"
+#include "camerabinresourcepolicy.h"
+
+#include <QtCore/qdebug.h>
+#include <QtCore/qfile.h>
+#include <QtCore/qmetaobject.h>
+
+#include <linux/types.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <sys/poll.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <linux/videodev2.h>
+
+//#define CAMEABIN_DEBUG 1
+#define ENUM_NAME(c,e,v) (c::staticMetaObject.enumerator(c::staticMetaObject.indexOfEnumerator(e)).valueToKey((v)))
+
+CameraBinControl::CameraBinControl(CameraBinSession *session)
+    :QCameraControl(session),
+    m_session(session),
+    m_state(QCamera::UnloadedState),
+    m_status(QCamera::UnloadedStatus),
+    m_reloadPending(false)
+{
+    connect(m_session, SIGNAL(stateChanged(QCamera::State)),
+            this, SLOT(updateStatus()));
+
+    connect(m_session->audioEncodeControl(), SIGNAL(settingsChanged()),
+            SLOT(reloadLater()));
+    connect(m_session->videoEncodeControl(), SIGNAL(settingsChanged()),
+            SLOT(reloadLater()));
+    connect(m_session->mediaContainerControl(), SIGNAL(settingsChanged()),
+            SLOT(reloadLater()));
+    connect(m_session->imageEncodeControl(), SIGNAL(settingsChanged()),
+            SLOT(reloadLater()));
+    connect(m_session, SIGNAL(viewfinderChanged()),
+            SLOT(reloadLater()));
+    connect(m_session, SIGNAL(readyChanged(bool)),
+            SLOT(reloadLater()));
+    connect(m_session, SIGNAL(error(int,QString)),
+            SLOT(handleCameraError(int,QString)));
+
+    m_resourcePolicy = new CamerabinResourcePolicy(this);
+    connect(m_resourcePolicy, SIGNAL(resourcesGranted()),
+            SLOT(handleResourcesGranted()));
+    connect(m_resourcePolicy, SIGNAL(resourcesDenied()),
+            SLOT(handleResourcesLost()));
+    connect(m_resourcePolicy, SIGNAL(resourcesLost()),
+            SLOT(handleResourcesLost()));
+
+    connect(m_session, SIGNAL(busyChanged(bool)),
+            SLOT(handleBusyChanged(bool)));
+}
+
+CameraBinControl::~CameraBinControl()
+{
+}
+
+QCamera::CaptureMode CameraBinControl::captureMode() const
+{
+    return m_session->captureMode();
+}
+
+void CameraBinControl::setCaptureMode(QCamera::CaptureMode mode)
+{
+    if (m_session->captureMode() != mode) {
+        m_session->setCaptureMode(mode);
+        reloadLater();
+
+        if (m_state == QCamera::ActiveState) {
+            m_resourcePolicy->setResourceSet(
+                        captureMode() == QCamera::CaptureStillImage ?
+                            CamerabinResourcePolicy::ImageCaptureResources :
+                            CamerabinResourcePolicy::VideoCaptureResources);
+        }
+        emit captureModeChanged(mode);
+    }
+}
+
+bool CameraBinControl::isCaptureModeSupported(QCamera::CaptureMode mode) const
+{
+#ifdef Q_WS_MAEMO_5
+    //Front camera on N900 supports only video capture
+    if (m_session->cameraRole() == CameraBinSession::FrontCamera)
+        return mode == QCamera::CaptureVideo;
+#endif
+
+    return mode == QCamera::CaptureStillImage || mode == QCamera::CaptureVideo;
+}
+
+void CameraBinControl::setState(QCamera::State state)
+{
+#ifdef CAMEABIN_DEBUG
+    qDebug() << Q_FUNC_INFO << ENUM_NAME(QCamera, "State", state);
+#endif
+    if (m_state != state) {
+        m_state = state;
+
+        //special case for stopping the camera while it's busy,
+        //it should be delayed until the camera is idle
+        if (state == QCamera::LoadedState &&
+                m_session->state() == QCamera::ActiveState &&
+                m_session->isBusy()) {
+#ifdef CAMEABIN_DEBUG
+            qDebug() << Q_FUNC_INFO << "Camera is busy, QCamera::stop() is delayed";
+#endif
+            emit stateChanged(m_state);
+            return;
+        }
+
+        CamerabinResourcePolicy::ResourceSet resourceSet;
+        switch (state) {
+        case QCamera::UnloadedState:
+            resourceSet = CamerabinResourcePolicy::NoResources;
+            break;
+        case QCamera::LoadedState:
+            resourceSet = CamerabinResourcePolicy::LoadedResources;
+            break;
+        case QCamera::ActiveState:
+            resourceSet = captureMode() == QCamera::CaptureStillImage ?
+                            CamerabinResourcePolicy::ImageCaptureResources :
+                            CamerabinResourcePolicy::VideoCaptureResources;
+            break;
+        }
+
+        m_resourcePolicy->setResourceSet(resourceSet);
+
+        if (m_resourcePolicy->isResourcesGranted()) {
+            //postpone changing to Active if the session is nor ready yet
+            if (state == QCamera::ActiveState) {
+                if (m_session->isReady()) {
+                    m_session->setState(state);
+                } else {
+#ifdef CAMEABIN_DEBUG
+                    qDebug() << "Camera session is not ready yet, postpone activating";
+#endif
+                }
+            } else
+                m_session->setState(state);
+        }
+
+        emit stateChanged(m_state);
+    }
+}
+
+QCamera::State CameraBinControl::state() const
+{
+    return m_state;
+}
+
+void CameraBinControl::updateStatus()
+{
+    QCamera::State sessionState = m_session->state();
+    QCamera::Status oldStatus = m_status;
+
+    switch (m_state) {
+    case QCamera::UnloadedState:
+        m_status = QCamera::UnloadedStatus;
+        break;
+    case QCamera::LoadedState:
+        switch (sessionState) {
+        case QCamera::UnloadedState:
+            m_status = QCamera::LoadingStatus;
+            break;
+        case QCamera::LoadedState:
+            m_status = QCamera::LoadedStatus;
+            break;
+        case QCamera::ActiveState:
+            m_status = QCamera::ActiveStatus;
+            break;
+        }
+        break;
+    case QCamera::ActiveState:
+        switch (sessionState) {
+        case QCamera::UnloadedState:
+            m_status = QCamera::LoadingStatus;
+            break;
+        case QCamera::LoadedState:
+            m_status = QCamera::StartingStatus;
+            break;
+        case QCamera::ActiveState:
+            m_status = QCamera::ActiveStatus;
+            break;
+        }
+    }
+
+    if (m_status != oldStatus) {
+#ifdef CAMEABIN_DEBUG
+        qDebug() << "Camera status changed" << ENUM_NAME(QCamera, "Status", m_status);
+#endif
+        emit statusChanged(m_status);
+    }
+}
+
+void CameraBinControl::reloadLater()
+{
+#ifdef CAMEABIN_DEBUG
+    qDebug() << "CameraBinControl: reload pipeline requested" << ENUM_NAME(QCamera, "State", m_state);
+#endif
+    if (!m_reloadPending && m_state == QCamera::ActiveState) {
+        m_reloadPending = true;
+
+        if (!m_session->isBusy()) {
+            m_session->setState(QCamera::LoadedState);
+            QMetaObject::invokeMethod(this, "delayedReload", Qt::QueuedConnection);
+        }
+    }
+}
+
+void CameraBinControl::handleResourcesLost()
+{
+#ifdef CAMEABIN_DEBUG
+    qDebug() << Q_FUNC_INFO << ENUM_NAME(QCamera, "State", m_state);
+#endif
+    m_session->setState(QCamera::UnloadedState);
+}
+
+void CameraBinControl::handleResourcesGranted()
+{
+#ifdef CAMEABIN_DEBUG
+    qDebug() << Q_FUNC_INFO << ENUM_NAME(QCamera, "State", m_state);
+#endif
+
+    //camera will be started soon by delayedReload()
+    if (m_reloadPending && m_state == QCamera::ActiveState)
+        return;
+
+    if (m_state == QCamera::ActiveState && m_session->isReady())
+        m_session->setState(QCamera::ActiveState);
+    else if (m_state == QCamera::LoadedState)
+        m_session->setState(QCamera::LoadedState);
+}
+
+void CameraBinControl::handleBusyChanged(bool busy)
+{
+    if (!busy && m_session->state() == QCamera::ActiveState) {
+        if (m_state == QCamera::LoadedState) {
+            //handle delayed stop() because of busy camera
+            m_resourcePolicy->setResourceSet(CamerabinResourcePolicy::LoadedResources);
+            m_session->setState(QCamera::LoadedState);
+        } else if (m_state == QCamera::ActiveState && m_reloadPending) {
+            //handle delayed reload because of busy camera
+            m_session->setState(QCamera::LoadedState);
+            QMetaObject::invokeMethod(this, "delayedReload", Qt::QueuedConnection);
+        }
+    }
+}
+
+void CameraBinControl::handleCameraError(int errorCode, const QString &errorString)
+{
+    emit error(errorCode, errorString);
+    setState(QCamera::UnloadedState);
+}
+
+void CameraBinControl::delayedReload()
+{
+#ifdef CAMEABIN_DEBUG
+    qDebug() << "CameraBinControl: reload pipeline";
+#endif
+    if (m_reloadPending) {
+        m_reloadPending = false;
+        if (m_state == QCamera::ActiveState &&
+            m_session->isReady() &&
+            m_resourcePolicy->isResourcesGranted()) {
+                m_session->setState(QCamera::ActiveState);
+        }
+    }
+}
+
+bool CameraBinControl::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;
+    }
+}
+
+#define VIEWFINDER_COLORSPACE_CONVERSION 0x00000004
+
+bool CameraBinControl::viewfinderColorSpaceConversion() const
+{
+    gint flags = 0;
+    g_object_get(G_OBJECT(m_session->cameraBin()), "flags", &flags, NULL);
+
+    return flags & VIEWFINDER_COLORSPACE_CONVERSION;
+}
+
+void CameraBinControl::setViewfinderColorSpaceConversion(bool enabled)
+{
+    gint flags = 0;
+    g_object_get(G_OBJECT(m_session->cameraBin()), "flags", &flags, NULL);
+
+    if (enabled)
+        flags |= VIEWFINDER_COLORSPACE_CONVERSION;
+    else
+        flags &= ~VIEWFINDER_COLORSPACE_CONVERSION;
+
+    g_object_set(G_OBJECT(m_session->cameraBin()), "flags", flags, NULL);
+}