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/*
* Copyright (C) 2019-2022 Igalia S.L. All rights reserved.
* Copyright (C) 2022 Metrological Group B.V.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#if USE(GSTREAMER_WEBRTC)
#include "GRefPtrGStreamer.h"
#include "GUniquePtrGStreamer.h"
#include "RTCDataChannelHandler.h"
#include "RTCDataChannelState.h"
#include "SharedBuffer.h"
#include <wtf/Condition.h>
#include <wtf/Lock.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
class Document;
class RTCDataChannelEvent;
class RTCDataChannelHandlerClient;
struct RTCDataChannelInit;
class GStreamerDataChannelHandler final : public RTCDataChannelHandler {
WTF_MAKE_TZONE_ALLOCATED(GStreamerDataChannelHandler);
public:
explicit GStreamerDataChannelHandler(GRefPtr<GstWebRTCDataChannel>&&);
~GStreamerDataChannelHandler();
RTCDataChannelInit dataChannelInit() const;
String label() const;
static GUniquePtr<GstStructure> fromRTCDataChannelInit(const RTCDataChannelInit&);
const GstWebRTCDataChannel* channel() const { return m_channel.get(); }
private:
// RTCDataChannelHandler API
void setClient(RTCDataChannelHandlerClient&, std::optional<ScriptExecutionContextIdentifier>) final;
bool sendStringData(const CString&) final;
bool sendRawData(std::span<const uint8_t>) final;
std::optional<unsigned short> id() const final;
void close() final;
void onMessageData(GBytes*);
void onMessageString(const char*);
void onError(GError*);
void onClose();
void readyStateChanged();
void bufferedAmountChanged();
bool checkState();
void postTask(Function<void()>&&);
struct StateChange {
RTCDataChannelState state;
std::optional<GError*> error;
};
using Message = std::variant<StateChange, String, Ref<FragmentedSharedBuffer>>;
using PendingMessages = Vector<Message>;
Lock m_clientLock;
GRefPtr<GstWebRTCDataChannel> m_channel;
std::optional<WeakPtr<RTCDataChannelHandlerClient>> m_client WTF_GUARDED_BY_LOCK(m_clientLock);
Markable<ScriptExecutionContextIdentifier> m_contextIdentifier;
PendingMessages m_pendingMessages WTF_GUARDED_BY_LOCK(m_clientLock);
std::optional<size_t> m_cachedBufferedAmount;
bool m_closing { false };
String m_channelId;
};
} // namespace WebCore
#endif // USE(GSTREAMER_WEBRTC)
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