Initial copy of QtMultimediaKit.
Comes from original repo, with SHA1: 2c82d5611655e5967f5c5095af50c0991c4378b2
This commit is contained in:
Michael Goddard
356
src/plugins/gstreamer/camerabin/camerabincontrol.cpp
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356
src/plugins/gstreamer/camerabin/camerabincontrol.cpp
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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "camerabincontrol.h"
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#include "camerabincontainer.h"
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#include "camerabinaudioencoder.h"
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#include "camerabinvideoencoder.h"
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#include "camerabinimageencoder.h"
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#include "camerabinresourcepolicy.h"
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#include <QtCore/qdebug.h>
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#include <QtCore/qfile.h>
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#include <QtCore/qmetaobject.h>
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#include <linux/types.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <sys/poll.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <linux/videodev2.h>
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//#define CAMEABIN_DEBUG 1
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#define ENUM_NAME(c,e,v) (c::staticMetaObject.enumerator(c::staticMetaObject.indexOfEnumerator(e)).valueToKey((v)))
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CameraBinControl::CameraBinControl(CameraBinSession *session)
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:QCameraControl(session),
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m_session(session),
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m_state(QCamera::UnloadedState),
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m_status(QCamera::UnloadedStatus),
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m_reloadPending(false)
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{
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connect(m_session, SIGNAL(stateChanged(QCamera::State)),
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this, SLOT(updateStatus()));
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connect(m_session->audioEncodeControl(), SIGNAL(settingsChanged()),
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SLOT(reloadLater()));
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connect(m_session->videoEncodeControl(), SIGNAL(settingsChanged()),
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SLOT(reloadLater()));
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connect(m_session->mediaContainerControl(), SIGNAL(settingsChanged()),
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SLOT(reloadLater()));
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connect(m_session->imageEncodeControl(), SIGNAL(settingsChanged()),
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SLOT(reloadLater()));
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connect(m_session, SIGNAL(viewfinderChanged()),
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SLOT(reloadLater()));
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connect(m_session, SIGNAL(readyChanged(bool)),
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SLOT(reloadLater()));
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connect(m_session, SIGNAL(error(int,QString)),
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SLOT(handleCameraError(int,QString)));
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m_resourcePolicy = new CamerabinResourcePolicy(this);
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connect(m_resourcePolicy, SIGNAL(resourcesGranted()),
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SLOT(handleResourcesGranted()));
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connect(m_resourcePolicy, SIGNAL(resourcesDenied()),
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SLOT(handleResourcesLost()));
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connect(m_resourcePolicy, SIGNAL(resourcesLost()),
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SLOT(handleResourcesLost()));
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connect(m_session, SIGNAL(busyChanged(bool)),
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SLOT(handleBusyChanged(bool)));
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}
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CameraBinControl::~CameraBinControl()
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{
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}
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QCamera::CaptureMode CameraBinControl::captureMode() const
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{
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return m_session->captureMode();
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}
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void CameraBinControl::setCaptureMode(QCamera::CaptureMode mode)
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{
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if (m_session->captureMode() != mode) {
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m_session->setCaptureMode(mode);
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reloadLater();
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if (m_state == QCamera::ActiveState) {
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m_resourcePolicy->setResourceSet(
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captureMode() == QCamera::CaptureStillImage ?
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CamerabinResourcePolicy::ImageCaptureResources :
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CamerabinResourcePolicy::VideoCaptureResources);
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}
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emit captureModeChanged(mode);
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}
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}
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bool CameraBinControl::isCaptureModeSupported(QCamera::CaptureMode mode) const
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{
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#ifdef Q_WS_MAEMO_5
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//Front camera on N900 supports only video capture
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if (m_session->cameraRole() == CameraBinSession::FrontCamera)
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return mode == QCamera::CaptureVideo;
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#endif
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return mode == QCamera::CaptureStillImage || mode == QCamera::CaptureVideo;
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}
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void CameraBinControl::setState(QCamera::State state)
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{
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#ifdef CAMEABIN_DEBUG
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qDebug() << Q_FUNC_INFO << ENUM_NAME(QCamera, "State", state);
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#endif
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if (m_state != state) {
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m_state = state;
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//special case for stopping the camera while it's busy,
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//it should be delayed until the camera is idle
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if (state == QCamera::LoadedState &&
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m_session->state() == QCamera::ActiveState &&
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m_session->isBusy()) {
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#ifdef CAMEABIN_DEBUG
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qDebug() << Q_FUNC_INFO << "Camera is busy, QCamera::stop() is delayed";
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#endif
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emit stateChanged(m_state);
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return;
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}
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CamerabinResourcePolicy::ResourceSet resourceSet;
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switch (state) {
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case QCamera::UnloadedState:
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resourceSet = CamerabinResourcePolicy::NoResources;
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break;
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case QCamera::LoadedState:
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resourceSet = CamerabinResourcePolicy::LoadedResources;
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break;
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case QCamera::ActiveState:
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resourceSet = captureMode() == QCamera::CaptureStillImage ?
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CamerabinResourcePolicy::ImageCaptureResources :
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CamerabinResourcePolicy::VideoCaptureResources;
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break;
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}
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m_resourcePolicy->setResourceSet(resourceSet);
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if (m_resourcePolicy->isResourcesGranted()) {
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//postpone changing to Active if the session is nor ready yet
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if (state == QCamera::ActiveState) {
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if (m_session->isReady()) {
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m_session->setState(state);
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} else {
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#ifdef CAMEABIN_DEBUG
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qDebug() << "Camera session is not ready yet, postpone activating";
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#endif
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}
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} else
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m_session->setState(state);
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}
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emit stateChanged(m_state);
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}
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}
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QCamera::State CameraBinControl::state() const
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{
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return m_state;
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}
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void CameraBinControl::updateStatus()
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{
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QCamera::State sessionState = m_session->state();
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QCamera::Status oldStatus = m_status;
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switch (m_state) {
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case QCamera::UnloadedState:
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m_status = QCamera::UnloadedStatus;
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break;
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case QCamera::LoadedState:
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switch (sessionState) {
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case QCamera::UnloadedState:
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m_status = QCamera::LoadingStatus;
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break;
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case QCamera::LoadedState:
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m_status = QCamera::LoadedStatus;
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break;
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case QCamera::ActiveState:
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m_status = QCamera::ActiveStatus;
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break;
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}
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break;
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case QCamera::ActiveState:
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switch (sessionState) {
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case QCamera::UnloadedState:
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m_status = QCamera::LoadingStatus;
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break;
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case QCamera::LoadedState:
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m_status = QCamera::StartingStatus;
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break;
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case QCamera::ActiveState:
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m_status = QCamera::ActiveStatus;
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break;
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}
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}
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if (m_status != oldStatus) {
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#ifdef CAMEABIN_DEBUG
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qDebug() << "Camera status changed" << ENUM_NAME(QCamera, "Status", m_status);
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#endif
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emit statusChanged(m_status);
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}
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}
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void CameraBinControl::reloadLater()
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{
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#ifdef CAMEABIN_DEBUG
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qDebug() << "CameraBinControl: reload pipeline requested" << ENUM_NAME(QCamera, "State", m_state);
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#endif
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if (!m_reloadPending && m_state == QCamera::ActiveState) {
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m_reloadPending = true;
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if (!m_session->isBusy()) {
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m_session->setState(QCamera::LoadedState);
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QMetaObject::invokeMethod(this, "delayedReload", Qt::QueuedConnection);
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}
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}
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}
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void CameraBinControl::handleResourcesLost()
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{
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#ifdef CAMEABIN_DEBUG
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qDebug() << Q_FUNC_INFO << ENUM_NAME(QCamera, "State", m_state);
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#endif
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m_session->setState(QCamera::UnloadedState);
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}
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void CameraBinControl::handleResourcesGranted()
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{
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#ifdef CAMEABIN_DEBUG
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qDebug() << Q_FUNC_INFO << ENUM_NAME(QCamera, "State", m_state);
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#endif
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//camera will be started soon by delayedReload()
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if (m_reloadPending && m_state == QCamera::ActiveState)
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return;
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if (m_state == QCamera::ActiveState && m_session->isReady())
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m_session->setState(QCamera::ActiveState);
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else if (m_state == QCamera::LoadedState)
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m_session->setState(QCamera::LoadedState);
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}
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void CameraBinControl::handleBusyChanged(bool busy)
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{
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if (!busy && m_session->state() == QCamera::ActiveState) {
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if (m_state == QCamera::LoadedState) {
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//handle delayed stop() because of busy camera
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m_resourcePolicy->setResourceSet(CamerabinResourcePolicy::LoadedResources);
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m_session->setState(QCamera::LoadedState);
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} else if (m_state == QCamera::ActiveState && m_reloadPending) {
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//handle delayed reload because of busy camera
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m_session->setState(QCamera::LoadedState);
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QMetaObject::invokeMethod(this, "delayedReload", Qt::QueuedConnection);
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}
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}
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}
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void CameraBinControl::handleCameraError(int errorCode, const QString &errorString)
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{
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emit error(errorCode, errorString);
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setState(QCamera::UnloadedState);
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}
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void CameraBinControl::delayedReload()
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{
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#ifdef CAMEABIN_DEBUG
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qDebug() << "CameraBinControl: reload pipeline";
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#endif
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if (m_reloadPending) {
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m_reloadPending = false;
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if (m_state == QCamera::ActiveState &&
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m_session->isReady() &&
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m_resourcePolicy->isResourcesGranted()) {
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m_session->setState(QCamera::ActiveState);
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}
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}
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}
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bool CameraBinControl::canChangeProperty(PropertyChangeType changeType, QCamera::Status status) const
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{
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Q_UNUSED(status);
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switch (changeType) {
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case QCameraControl::CaptureMode:
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case QCameraControl::ImageEncodingSettings:
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case QCameraControl::VideoEncodingSettings:
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case QCameraControl::Viewfinder:
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return true;
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default:
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return false;
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}
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}
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#define VIEWFINDER_COLORSPACE_CONVERSION 0x00000004
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bool CameraBinControl::viewfinderColorSpaceConversion() const
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{
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gint flags = 0;
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g_object_get(G_OBJECT(m_session->cameraBin()), "flags", &flags, NULL);
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return flags & VIEWFINDER_COLORSPACE_CONVERSION;
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}
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void CameraBinControl::setViewfinderColorSpaceConversion(bool enabled)
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{
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gint flags = 0;
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g_object_get(G_OBJECT(m_session->cameraBin()), "flags", &flags, NULL);
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if (enabled)
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flags |= VIEWFINDER_COLORSPACE_CONVERSION;
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else
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flags &= ~VIEWFINDER_COLORSPACE_CONVERSION;
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g_object_set(G_OBJECT(m_session->cameraBin()), "flags", flags, NULL);
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}
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