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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qwasmimagecapture_p.h"
#include "qwasmmediacapturesession_p.h"
#include "qwasmcamera_p.h"
#include "qwasmvideosink_p.h"
#include <QtGui/qimagewriter.h>
#include <QtCore/qdir.h>
#include <QtCore/private/qstdweb_p.h>
#include <emscripten/val.h>
QT_BEGIN_NAMESPACE
using namespace Qt::Literals;
Q_LOGGING_CATEGORY(qWasmImageCapture, "qt.multimedia.wasm.imagecapture")
/* TODO
signals:
imageExposed
*/
QWasmImageCapture::QWasmImageCapture(QImageCapture *parent) : QPlatformImageCapture(parent) { }
QWasmImageCapture::~QWasmImageCapture() = default;
int QWasmImageCapture::capture(const QString &fileName)
{
if (!isReadyForCapture()) {
Q_EMIT error(m_lastId, QImageCapture::NotReadyError, msgCameraNotReady());
return -1;
}
QString imageFilenName;
if (fileName.isEmpty())
imageFilenName = QDir::homePath() + u"/image.jpg"_s;
else
imageFilenName = fileName;
QImage image = takePicture();
if (image.isNull())
return -1;
QImageWriter writer(imageFilenName);
// TODO
// writer.setQuality(quality);
// writer.setFormat("png");
if (writer.write(image)) {
qCDebug(qWasmImageCapture) << Q_FUNC_INFO << "image saved";
Q_EMIT imageSaved(m_lastId, fileName);
} else {
QImageCapture::Error err = (writer.error() == QImageWriter::UnsupportedFormatError)
? QImageCapture::FormatError
: QImageCapture::ResourceError;
Q_EMIT error(m_lastId, err, writer.errorString());
}
return m_lastId;
}
int QWasmImageCapture::captureToBuffer()
{
if (!isReadyForCapture()) {
Q_EMIT error(m_lastId, QImageCapture::NotReadyError, msgCameraNotReady());
return -1;
}
QImage image = takePicture();
if (image.isNull())
return -1;
Q_EMIT imageCaptured(m_lastId, image);
return m_lastId;
}
QImage QWasmImageCapture::takePicture()
{
m_lastId++;
// Try the fast path: grab the current frame and convert via RHI.
QVideoFrame thisFrame = m_captureSession->videoSink()->videoFrame();
QImage image;
if (thisFrame.isValid()) {
Q_EMIT imageAvailable(m_lastId, thisFrame);
image = thisFrame.toImage();
}
if (image.isNull()) {
qCDebug(qWasmImageCapture) << Q_FUNC_INFO << "image capture failed";
Q_EMIT error(m_lastId, QImageCapture::ResourceError, QStringLiteral("Capture failed"));
return QImage();
}
Q_EMIT imageCaptured(m_lastId, image);
if (m_settings.resolution().isValid() && m_settings.resolution() != image.size())
image = image.scaled(m_settings.resolution());
return image;
}
bool QWasmImageCapture::isReadyForCapture() const
{
return m_isReadyForCapture;
}
QImageEncoderSettings QWasmImageCapture::imageSettings() const
{
return m_settings;
}
void QWasmImageCapture::setImageSettings(const QImageEncoderSettings &settings)
{
m_settings = settings;
}
void QWasmImageCapture::setReadyForCapture(bool isReady)
{
if (m_isReadyForCapture != isReady) {
m_isReadyForCapture = isReady;
Q_EMIT readyForCaptureChanged(m_isReadyForCapture);
}
}
void QWasmImageCapture::setCaptureSession(QPlatformMediaCaptureSession *session)
{
QWasmMediaCaptureSession *captureSession = static_cast<QWasmMediaCaptureSession *>(session);
// nullptr clears
if (m_captureSession == captureSession)
return;
if (captureSession) {
m_lastId = 0;
m_captureSession = captureSession;
}
m_captureSession = captureSession;
}
QT_END_NAMESPACE