qwasmwindowcapture.cpp

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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 "qwasmwindowcapture_p.h"
 
#include "qwasmmediacapturesession_p.h"
#include "qwasmcamera_p.h"
#include "qwasmvideosink_p.h"
 
#include <QtMultimedia/qmediacapturesession.h>
 
QT_BEGIN_NAMESPACE
 
Q_LOGGING_CATEGORY(qLcWasmWindowcapture, "qt.multimedia.wasm.windowcapture")
 
QWasmWindowCapture::QWasmWindowCapture(QWindowCapture *winCap) :
      QPlatformSurfaceCapture(WindowSource{})
{
    setCaptureSession(dynamic_cast<QPlatformMediaCaptureSession *>(winCap->captureSession()));
}
 
QWasmWindowCapture::~QWasmWindowCapture() = default;
 
QVideoFrameFormat QWasmWindowCapture::frameFormat() const
{
    return {};
}
 
bool QWasmWindowCapture::setActiveInternal(bool active)
{
    if (active)
        m_captureSession->setVideoSource("window");
    else
        m_captureSession->setVideoSource("");
 
    return true;
}
void QWasmWindowCapture::setCaptureSession(QPlatformMediaCaptureSession *session)
{
    m_captureSession = dynamic_cast<QWasmMediaCaptureSession *>(session);
}
 
void QWasmWindowCapture::setVideoStream(emscripten::val stream)
{
    if (m_videoOutput) {
        emscripten::val videoTracks = stream.call<emscripten::val>("getVideoTracks");
        if (videoTracks.isNull() || videoTracks.isUndefined()) {
            qWarning() << Q_FUNC_INFO << "videoTracks is null";
 
            return;
        }
 
        emscripten::val videoSettings = videoTracks[0].call<emscripten::val>("getSettings");
 
        if (!videoSettings.isNull() || !videoSettings.isUndefined()) {
            int width = videoSettings["width"].as<int>();
            int height = videoSettings["height"].as<int>();
 
            QSize initialSize(width, height);
            QRect initialRect(QPoint(0, 0),initialSize);
 
            m_videoOutput->updateVideoElementGeometry(initialRect);
 
        }
        emscripten::val videoElement = m_videoOutput->currentVideoElement();
 
        videoElement.set("srcObject", stream);
        m_videoOutput->start();
    }
}
 
void QWasmWindowCapture::setVideoOutput(QWasmVideoOutput *object)
{
    if (object)
        m_videoOutput = object;
}
 
QT_END_NAMESPACE