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/*
* Copyright (C) 2018 Metrological Group B.V.
* Copyright (C) 2020 Igalia S.L.
* Author: Thibault Saunier <tsaunier@igalia.com>
* Author: Alejandro G. Castro <alex@igalia.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* aint with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#pragma once
#if ENABLE(MEDIA_STREAM) && USE(GSTREAMER)
#include "GStreamerCaptureDevice.h"
#include "GStreamerCommon.h"
#include <wtf/ThreadSafeRefCounted.h>
#include <wtf/WeakHashSet.h>
namespace WebCore {
class GStreamerCapturerObserver;
}
namespace WTF {
template<typename T> struct IsDeprecatedWeakRefSmartPointerException;
template<> struct IsDeprecatedWeakRefSmartPointerException<WebCore::GStreamerCapturerObserver> : std::true_type { };
}
namespace WebCore {
class GStreamerCapturerObserver : public CanMakeWeakPtr<GStreamerCapturerObserver> {
public:
virtual ~GStreamerCapturerObserver();
virtual void sourceCapsChanged(const GstCaps*) { }
virtual void captureEnded() { }
};
class GStreamerCapturer : public ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<GStreamerCapturer> {
public:
GStreamerCapturer(GStreamerCaptureDevice&&, GRefPtr<GstCaps>&&);
GStreamerCapturer(const char* sourceFactory, GRefPtr<GstCaps>&&, CaptureDevice::DeviceType);
virtual ~GStreamerCapturer();
void tearDown(bool disconnectSignals = true);
void addObserver(GStreamerCapturerObserver&);
void removeObserver(GStreamerCapturerObserver&);
void forEachObserver(NOESCAPE const Function<void(GStreamerCapturerObserver&)>&);
void setupPipeline();
void start();
void stop();
bool isStopped() const;
WARN_UNUSED_RETURN GRefPtr<GstCaps> caps();
std::pair<GstClockTime, GstClockTime> queryLatency();
GstElement* makeElement(const char* factoryName);
virtual GstElement* createSource();
GstElement* source() { return m_src.get(); }
virtual const char* name() = 0;
GstElement* sink() const { return m_sink.get(); }
GstElement* pipeline() const { return m_pipeline.get(); }
virtual GstElement* createConverter() = 0;
bool isInterrupted() const;
void setInterrupted(bool);
CaptureDevice::DeviceType deviceType() const { return m_deviceType; }
const String& devicePersistentId() const { return m_device ? m_device->persistentId() : emptyString(); }
void stopDevice(bool disconnectSignals);
protected:
GRefPtr<GstElement> m_sink;
GRefPtr<GstElement> m_src;
GRefPtr<GstElement> m_valve;
GRefPtr<GstElement> m_capsfilter;
std::optional<GStreamerCaptureDevice> m_device { };
GRefPtr<GstCaps> m_caps;
GRefPtr<GstElement> m_pipeline;
const char* m_sourceFactory;
private:
CaptureDevice::DeviceType m_deviceType;
WeakHashSet<GStreamerCapturerObserver> m_observers;
};
} // namespace WebCore
#endif // ENABLE(MEDIA_STREAM) && USE(GSTREAMER)
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