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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd and/or its subsidiary(-ies).
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "avfcameradebug.h"
#include "avfimagecapturecontrol.h"
#include "avfcameraservice.h"
#include "avfcameracontrol.h"
#include <QtCore/qurl.h>
#include <QtCore/qfile.h>
#include <QtCore/qbuffer.h>
#include <QtConcurrent/qtconcurrentrun.h>
#include <QtGui/qimagereader.h>
#include <private/qvideoframe_p.h>
QT_USE_NAMESPACE
AVFImageCaptureControl::AVFImageCaptureControl(AVFCameraService *service, QObject *parent)
: QCameraImageCaptureControl(parent)
, m_session(service->session())
, m_cameraControl(service->cameraControl())
, m_ready(false)
, m_lastCaptureId(0)
, m_videoConnection(nil)
{
Q_UNUSED(service);
m_stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
NSDictionary *outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys:
AVVideoCodecJPEG, AVVideoCodecKey, nil];
[m_stillImageOutput setOutputSettings:outputSettings];
[outputSettings release];
connect(m_cameraControl, SIGNAL(captureModeChanged(QCamera::CaptureModes)), SLOT(updateReadyStatus()));
connect(m_cameraControl, SIGNAL(statusChanged(QCamera::Status)), SLOT(updateReadyStatus()));
connect(m_session, SIGNAL(readyToConfigureConnections()), SLOT(updateCaptureConnection()));
connect(m_session, &AVFCameraSession::newViewfinderFrame,
this, &AVFImageCaptureControl::onNewViewfinderFrame,
Qt::DirectConnection);
}
AVFImageCaptureControl::~AVFImageCaptureControl()
{
}
bool AVFImageCaptureControl::isReadyForCapture() const
{
return m_videoConnection &&
m_cameraControl->captureMode().testFlag(QCamera::CaptureStillImage) &&
m_cameraControl->status() == QCamera::ActiveStatus;
}
void AVFImageCaptureControl::updateReadyStatus()
{
if (m_ready != isReadyForCapture()) {
m_ready = !m_ready;
qDebugCamera() << "ReadyToCapture status changed:" << m_ready;
Q_EMIT readyForCaptureChanged(m_ready);
}
}
int AVFImageCaptureControl::capture(const QString &fileName)
{
m_lastCaptureId++;
if (!isReadyForCapture()) {
QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection,
Q_ARG(int, m_lastCaptureId),
Q_ARG(int, QCameraImageCapture::NotReadyError),
Q_ARG(QString, tr("Camera not ready")));
return m_lastCaptureId;
}
QString actualFileName = m_storageLocation.generateFileName(fileName,
QCamera::CaptureStillImage,
QLatin1String("img_"),
QLatin1String("jpg"));
qDebugCamera() << "Capture image to" << actualFileName;
CaptureRequest request = { m_lastCaptureId, new QSemaphore };
m_requestsMutex.lock();
m_captureRequests.enqueue(request);
m_requestsMutex.unlock();
[m_stillImageOutput captureStillImageAsynchronouslyFromConnection:m_videoConnection
completionHandler: ^(CMSampleBufferRef imageSampleBuffer, NSError *error) {
// Wait for the preview to be generated before saving the JPEG
request.previewReady->acquire();
delete request.previewReady;
if (error) {
QStringList messageParts;
messageParts << QString::fromUtf8([[error localizedDescription] UTF8String]);
messageParts << QString::fromUtf8([[error localizedFailureReason] UTF8String]);
messageParts << QString::fromUtf8([[error localizedRecoverySuggestion] UTF8String]);
QString errorMessage = messageParts.join(" ");
qDebugCamera() << "Image capture failed:" << errorMessage;
QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection,
Q_ARG(int, request.captureId),
Q_ARG(int, QCameraImageCapture::ResourceError),
Q_ARG(QString, errorMessage));
} else {
qDebugCamera() << "Image capture completed:" << actualFileName;
NSData *nsJpgData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageSampleBuffer];
QByteArray jpgData = QByteArray::fromRawData((const char *)[nsJpgData bytes], [nsJpgData length]);
QFile f(actualFileName);
if (f.open(QFile::WriteOnly)) {
if (f.write(jpgData) != -1) {
QMetaObject::invokeMethod(this, "imageSaved", Qt::QueuedConnection,
Q_ARG(int, request.captureId),
Q_ARG(QString, actualFileName));
} else {
QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection,
Q_ARG(int, request.captureId),
Q_ARG(int, QCameraImageCapture::OutOfSpaceError),
Q_ARG(QString, f.errorString()));
}
} else {
QString errorMessage = tr("Could not open destination file:\n%1").arg(actualFileName);
QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection,
Q_ARG(int, request.captureId),
Q_ARG(int, QCameraImageCapture::ResourceError),
Q_ARG(QString, errorMessage));
}
}
}];
return request.captureId;
}
void AVFImageCaptureControl::onNewViewfinderFrame(const QVideoFrame &frame)
{
QMutexLocker locker(&m_requestsMutex);
if (m_captureRequests.isEmpty())
return;
CaptureRequest request = m_captureRequests.dequeue();
Q_EMIT imageExposed(request.captureId);
QtConcurrent::run(this, &AVFImageCaptureControl::makeCapturePreview,
request,
frame,
0 /* rotation */);
}
void AVFImageCaptureControl::makeCapturePreview(CaptureRequest request,
const QVideoFrame &frame,
int rotation)
{
QTransform transform;
transform.rotate(rotation);
Q_EMIT imageCaptured(request.captureId, qt_imageFromVideoFrame(frame).transformed(transform));
request.previewReady->release();
}
void AVFImageCaptureControl::cancelCapture()
{
//not supported
}
void AVFImageCaptureControl::updateCaptureConnection()
{
if (m_cameraControl->captureMode().testFlag(QCamera::CaptureStillImage)) {
qDebugCamera() << Q_FUNC_INFO;
AVCaptureSession *captureSession = m_session->captureSession();
if (![captureSession.outputs containsObject:m_stillImageOutput]) {
if ([captureSession canAddOutput:m_stillImageOutput]) {
[captureSession addOutput:m_stillImageOutput];
m_videoConnection = [m_stillImageOutput connectionWithMediaType:AVMediaTypeVideo];
updateReadyStatus();
}
} else {
m_videoConnection = [m_stillImageOutput connectionWithMediaType:AVMediaTypeVideo];
}
}
}
#include "moc_avfimagecapturecontrol.cpp"
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