webrtc_set_description_observer.h | Explore in Territory

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_WEBRTC_SET_DESCRIPTION_OBSERVER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_WEBRTC_SET_DESCRIPTION_OBSERVER_H_

#include <memory>
#include <vector>

#include "base/memory/scoped_refptr.h"
#include "base/task/single_thread_task_runner.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/modules/peerconnection/rtc_peer_connection_handler.h"
#include "third_party/blink/renderer/modules/peerconnection/rtc_rtp_receiver_impl.h"
#include "third_party/blink/renderer/modules/peerconnection/rtc_rtp_sender_impl.h"
#include "third_party/blink/renderer/modules/peerconnection/rtc_rtp_transceiver_impl.h"
#include "third_party/blink/renderer/modules/peerconnection/transceiver_state_surfacer.h"
#include "third_party/blink/renderer/modules/peerconnection/webrtc_media_stream_track_adapter_map.h"
#include "third_party/blink/renderer/platform/allow_discouraged_type.h"
#include "third_party/blink/renderer/platform/wtf/thread_safe_ref_counted.h"
#include "third_party/webrtc/api/jsep.h"
#include "third_party/webrtc/api/peer_connection_interface.h"
#include "third_party/webrtc/api/rtc_error.h"
#include "third_party/webrtc/api/rtp_receiver_interface.h"
#include "third_party/webrtc/api/scoped_refptr.h"
#include "third_party/webrtc/api/set_remote_description_observer_interface.h"
#include "third_party/webrtc/rtc_base/ref_count.h"
#include "third_party/webrtc/rtc_base/ref_counted_object.h"

namespace blink {

// Copies the session description.
// Note: At the time of writing, third_party/webrtc/pc/sdp_utils.h's
// webrtc::CloneSessionDescription() creates a copy that does not include
// candidates added with AddIceCandidate. This is why we need our own copy
// function, which copies everything.
std::unique_ptr<webrtc::SessionDescriptionInterface> CopySessionDescription(
    const webrtc::SessionDescriptionInterface* description);

// The blink layer correspondent of the setLocalDescription() observer
// (webrtc::SetSessionDescriptionObserver) and setRemoteDescription() observer
// (webrtc::SetRemoteDescriptionObserverInterface). The implementation should
// process the state changes of the Set[Local/Remote]Description() by inspecting
// the updated States.
class MODULES_EXPORT WebRtcSetDescriptionObserver
    : public WTF::ThreadSafeRefCounted<WebRtcSetDescriptionObserver> { … };

// Takes care of surfacing WebRtcSetDescriptionObserver::State information from
// the webrtc signaling thread to the main thread. With the state information
// obtained, invokes |observer_|'s
// WebRtcSetDescriptionObserver::OnSetDescriptionComplete() on the main thread.
//
// This implements the behavior
// of both WebRtcSetLocalDescriptionObserverHandler and
// WebRtcSetRemoteDescriptionObserverHandler, but these are put in different
// classes because local and remote description observers have different
// interfaces in webrtc.
class MODULES_EXPORT WebRtcSetDescriptionObserverHandlerImpl
    : public WTF::ThreadSafeRefCounted<
          WebRtcSetDescriptionObserverHandlerImpl> { … };

// An implementation of webrtc::SetLocalDescriptionObserverInterface for
// performing the operations of WebRtcSetDescriptionObserverHandlerImpl.
class MODULES_EXPORT WebRtcSetLocalDescriptionObserverHandler
    : public webrtc::SetLocalDescriptionObserverInterface { … };

// An implementation of webrtc::SetRemoteDescriptionObserverInterface for
// performing the operations of WebRtcSetDescriptionObserverHandlerImpl.
class MODULES_EXPORT WebRtcSetRemoteDescriptionObserverHandler
    : public webrtc::SetRemoteDescriptionObserverInterface { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_WEBRTC_SET_DESCRIPTION_OBSERVER_H_
chromium/third_party/blink/renderer/modules/peerconnection/webrtc_set_description_observer.h
