avfcamera.mm

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// Copyright (C) 2022 The Qt Company Ltd and/or its subsidiary(-ies).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "avfcamera_p.h"
 
#include <camera/avfcamerasession_p.h>
#include <camera/avfcameraservice_p.h>
#include <camera/avfcamerarenderer_p.h>
 
#include <QtMultimedia/qmediacapturesession.h>
#include <QtMultimedia/private/qavfcameradebug_p.h>
#include <QtMultimedia/private/qavfcamerautility_p.h>
 
QT_USE_NAMESPACE
 
AVFCamera::AVFCamera(QCamera *camera)
   : QAVFCameraBase(camera)
{
    Q_ASSERT(camera);
}
 
AVFCamera::~AVFCamera() = default;
 
q23::expected<void, QString> AVFCamera::onActiveChanged(bool active)
{
    if (m_session)
        m_session->setActive(active);
    return {};
}
 
void AVFCamera::onCameraDeviceChanged(
    const QCameraDevice &newCameraDevice,
    const QCameraFormat &newFormat)
{
    // The incoming format should never be null if the incoming device is not null.
    Q_ASSERT(newCameraDevice.isNull() || !newFormat.isNull());
 
    if (newCameraDevice.isNull() || !checkCameraPermission())
        return;
 
    if (m_session) {
        // TODO: In the future, we should pass the new format into setActiveCamera,
        // and determine if we can keep the camera-stream active with the new
        // device + format. Then we should propagate any errors up the call stack.
        m_session->setActiveCamera(newCameraDevice);
        m_session->setCameraFormat(newFormat);
    }
}
 
bool AVFCamera::tryApplyCameraFormat(const QCameraFormat &newFormat)
{
    // TODO: In the future, we should be able to return false if we failed
    // to apply the format.
    if (m_session)
        m_session->setCameraFormat(newFormat);
    return true;
}
 
void AVFCamera::setCaptureSession(QPlatformMediaCaptureSession *session)
{
    AVFCameraService *captureSession = static_cast<AVFCameraService *>(session);
    if (m_service == captureSession)
        return;
 
    if (m_session) {
        m_session->disconnect(this);
        m_session->setActiveCamera({});
        m_session->setCameraFormat({});
    }
 
    m_service = captureSession;
    if (!m_service) {
        m_session = nullptr;
        return;
    }
 
    m_session = m_service->session();
    Q_ASSERT(m_session);
 
    m_session->setActiveCamera(m_cameraDevice);
    m_session->setCameraFormat(m_cameraFormat);
    m_session->setActive(m_active);
}
 
#include "moc_avfcamera_p.cpp"