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// Copyright (C) 2021 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 <qtmultimediaglobal_p.h>
#include "qplatformmediaintegration_p.h"
#include "qplatformmediadevices_p.h"
#include <qatomic.h>
#include <qmutex.h>
#include <qplatformaudioinput_p.h>
#include <qplatformaudiooutput_p.h>
#include <qplatformvideodevices_p.h>
#include <qmediadevices.h>
#include <qcameradevice.h>
#include <qloggingcategory.h>
#include "QtCore/private/qfactoryloader_p.h"
#include "qplatformmediaplugin_p.h"
class QDummyIntegration : public QPlatformMediaIntegration
{
public:
QDummyIntegration() { qFatal("QtMultimedia is not currently supported on this platform or compiler."); }
QPlatformMediaFormatInfo *formatInfo() override { return nullptr; }
};
Q_LOGGING_CATEGORY(qLcMediaPlugin, "qt.multimedia.plugin")
Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
(QPlatformMediaPlugin_iid,
QLatin1String("/multimedia")))
static QStringList backends()
{
QStringList list;
if (QFactoryLoader *fl = loader()) {
const auto keyMap = fl->keyMap();
for (auto it = keyMap.constBegin(); it != keyMap.constEnd(); ++it)
if (!list.contains(it.value()))
list << it.value();
}
qCDebug(qLcMediaPlugin) << "Available backends" << list;
return list;
}
QT_BEGIN_NAMESPACE
namespace {
struct Holder {
~Holder()
{
QMutexLocker locker(&mutex);
instance = nullptr;
}
QBasicMutex mutex;
QPlatformMediaIntegration *instance = nullptr;
QPlatformMediaIntegration *nativeInstance = nullptr;
} holder;
}
QPlatformMediaIntegration *QPlatformMediaIntegration::instance()
{
QMutexLocker locker(&holder.mutex);
if (holder.instance)
return holder.instance;
auto plugins = backends();
QString type = QString::fromUtf8(qgetenv("QT_MEDIA_BACKEND"));
if (type.isEmpty() && !plugins.isEmpty()) {
type = plugins.first();
// FIXME: prefer platform specific backend if available over ffmpeg until it becomes mature
if (type == QStringLiteral("ffmpeg") && plugins.size() > 1)
type = plugins[1];
}
qCDebug(qLcMediaPlugin) << "loading backend" << type;
holder.nativeInstance = qLoadPlugin<QPlatformMediaIntegration, QPlatformMediaPlugin>(loader(), type);
if (!holder.nativeInstance) {
qWarning() << "could not load multimedia backend" << type;
holder.nativeInstance = new QDummyIntegration;
}
holder.instance = holder.nativeInstance;
return holder.instance;
}
/*
This API is there to be able to test with a mock backend.
*/
void QPlatformMediaIntegration::setIntegration(QPlatformMediaIntegration *integration)
{
if (integration)
holder.instance = integration;
else
holder.instance = holder.nativeInstance;
}
QList<QCameraDevice> QPlatformMediaIntegration::videoInputs()
{
return m_videoDevices ? m_videoDevices->videoDevices() : QList<QCameraDevice>{};
}
QMaybe<QPlatformAudioInput *> QPlatformMediaIntegration::createAudioInput(QAudioInput *q)
{
return new QPlatformAudioInput(q);
}
QMaybe<QPlatformAudioOutput *> QPlatformMediaIntegration::createAudioOutput(QAudioOutput *q)
{
return new QPlatformAudioOutput(q);
}
QPlatformMediaIntegration::~QPlatformMediaIntegration()
{
delete m_videoDevices;
}
QT_END_NAMESPACE
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