Initial implementation of Mac camera backend
Based on AVFoundation framework Change-Id: If4cfd105a592f50b42606624548b9ffc870e3e47 Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>
This commit is contained in:
Dmytro Poplavskiy
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Qt by Nokia
Qt by Nokia
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09a7fda971
commit
37b872da9e
277
src/plugins/avfoundation/camera/avfcamerasession.mm
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277
src/plugins/avfoundation/camera/avfcamerasession.mm
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/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** 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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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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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 "avfcameradebug.h"
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#include "avfcamerasession.h"
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#include "avfcameraservice.h"
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#include "avfcameracontrol.h"
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#include "avfvideorenderercontrol.h"
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#include "avfvideodevicecontrol.h"
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#include "avfaudioinputselectorcontrol.h"
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#include <CoreFoundation/CoreFoundation.h>
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#include <Foundation/Foundation.h>
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#include <QtCore/qdatetime.h>
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#include <QtCore/qurl.h>
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#include <QtCore/qdebug.h>
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QT_USE_NAMESPACE
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@interface AVFCameraSessionObserver : NSObject
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{
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@private
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AVFCameraSession *m_session;
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AVCaptureSession *m_captureSession;
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}
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- (AVFCameraSessionObserver *) initWithCameraSession:(AVFCameraSession*)session;
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- (void) processRuntimeError:(NSNotification *)notification;
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- (void) processSessionStarted:(NSNotification *)notification;
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- (void) processSessionStopped:(NSNotification *)notification;
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@end
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@implementation AVFCameraSessionObserver
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- (AVFCameraSessionObserver *) initWithCameraSession:(AVFCameraSession*)session
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{
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if (!(self = [super init]))
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return nil;
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self->m_session = session;
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self->m_captureSession = session->captureSession();
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(processRuntimeError:)
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name:AVCaptureSessionRuntimeErrorNotification
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object:m_captureSession];
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(processSessionStarted:)
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name:AVCaptureSessionDidStartRunningNotification
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object:m_captureSession];
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(processSessionStopped:)
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name:AVCaptureSessionDidStopRunningNotification
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object:m_captureSession];
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return self;
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}
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- (void) processRuntimeError:(NSNotification *)notification
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{
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Q_UNUSED(notification);
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QMetaObject::invokeMethod(m_session, "processRuntimeError", Qt::AutoConnection);
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}
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- (void) processSessionStarted:(NSNotification *)notification
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{
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Q_UNUSED(notification);
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QMetaObject::invokeMethod(m_session, "processSessionStarted", Qt::AutoConnection);
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}
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- (void) processSessionStopped:(NSNotification *)notification
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{
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Q_UNUSED(notification);
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QMetaObject::invokeMethod(m_session, "processSessionStopped", Qt::AutoConnection);
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}
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@end
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AVFCameraSession::AVFCameraSession(AVFCameraService *service, QObject *parent)
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: QObject(parent)
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, m_service(service)
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, m_state(QCamera::UnloadedState)
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, m_active(false)
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, m_videoInput(nil)
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, m_audioInput(nil)
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{
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m_captureSession = [[AVCaptureSession alloc] init];
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m_observer = [[AVFCameraSessionObserver alloc] initWithCameraSession:this];
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//configuration is commited during transition to Active state
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[m_captureSession beginConfiguration];
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}
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AVFCameraSession::~AVFCameraSession()
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{
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if (m_videoInput) {
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[m_captureSession removeInput:m_videoInput];
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[m_videoInput release];
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}
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if (m_audioInput) {
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[m_captureSession removeInput:m_audioInput];
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[m_audioInput release];
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}
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[m_observer release];
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[m_captureSession release];
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}
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void AVFCameraSession::setVideoOutput(AVFVideoRendererControl *output)
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{
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m_videoOutput = output;
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if (output)
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output->configureAVCaptureSession(m_captureSession);
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}
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QCamera::State AVFCameraSession::state() const
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{
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if (m_active)
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return QCamera::ActiveState;
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return m_state == QCamera::ActiveState ? QCamera::LoadedState : m_state;
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}
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void AVFCameraSession::setState(QCamera::State newState)
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{
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if (m_state == newState)
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return;
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qDebugCamera() << Q_FUNC_INFO << m_state << " -> " << newState;
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QCamera::State oldState = m_state;
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m_state = newState;
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//attach audio and video inputs during Unloaded->Loaded transition
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if (oldState == QCamera::UnloadedState) {
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attachInputDevices();
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}
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if (m_state == QCamera::ActiveState) {
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Q_EMIT readyToConfigureConnections();
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[m_captureSession commitConfiguration];
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[m_captureSession startRunning];
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}
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if (oldState == QCamera::ActiveState) {
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[m_captureSession stopRunning];
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[m_captureSession beginConfiguration];
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}
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Q_EMIT stateChanged(m_state);
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}
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void AVFCameraSession::processRuntimeError()
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{
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qWarning() << tr("Runtime camera error");
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Q_EMIT error(QCamera::CameraError, tr("Runtime camera error"));
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}
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void AVFCameraSession::processSessionStarted()
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{
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qDebugCamera() << Q_FUNC_INFO;
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if (!m_active) {
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m_active = true;
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Q_EMIT activeChanged(m_active);
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Q_EMIT stateChanged(state());
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}
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}
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void AVFCameraSession::processSessionStopped()
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{
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qDebugCamera() << Q_FUNC_INFO;
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if (m_active) {
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m_active = false;
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Q_EMIT activeChanged(m_active);
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Q_EMIT stateChanged(state());
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}
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}
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void AVFCameraSession::attachInputDevices()
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{
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//Attach video input device:
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if (m_service->videoDeviceControl()->isDirty()) {
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if (m_videoInput) {
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[m_captureSession removeInput:m_videoInput];
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[m_videoInput release];
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m_videoInput = 0;
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}
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AVCaptureDevice *videoDevice = m_service->videoDeviceControl()->createCaptureDevice();
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NSError *error = nil;
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m_videoInput = [AVCaptureDeviceInput
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deviceInputWithDevice:videoDevice
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error:&error];
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if (!m_videoInput) {
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qWarning() << "Failed to create video device input";
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} else {
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if ([m_captureSession canAddInput:m_videoInput]) {
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[m_videoInput retain];
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[m_captureSession addInput:m_videoInput];
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} else {
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qWarning() << "Failed to connect video device input";
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}
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}
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}
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//Attach audio input device:
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if (m_service->audioInputSelectorControl()->isDirty()) {
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if (m_audioInput) {
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[m_captureSession removeInput:m_audioInput];
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[m_audioInput release];
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m_audioInput = 0;
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}
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AVCaptureDevice *audioDevice = m_service->audioInputSelectorControl()->createCaptureDevice();
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NSError *error = nil;
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m_audioInput = [AVCaptureDeviceInput
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deviceInputWithDevice:audioDevice
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error:&error];
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if (!m_audioInput) {
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qWarning() << "Failed to create audio device input";
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} else {
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[m_audioInput retain];
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[m_captureSession addInput:m_audioInput];
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}
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}
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}
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#include "moc_avfcamerasession.cpp"
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