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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_HOST_HOST_EXTENSION_SESSION_H_
#define REMOTING_HOST_HOST_EXTENSION_SESSION_H_
#include "base/memory/scoped_ptr.h"
namespace webrtc {
class DesktopCapturer;
}
namespace remoting {
class ClientSessionControl;
class VideoEncoder;
namespace protocol {
class ExtensionMessage;
class ClientStub;
} // namespace protocol
// Created by an |HostExtension| to store |ClientSession| specific state, and to
// handle extension messages.
class HostExtensionSession {
public:
virtual ~HostExtensionSession() {}
// Hook functions called when the video pipeline is being (re)constructed.
// Implementations will receive these calls only if they express the need to
// modify the pipeline (see below). They may replace or wrap |capturer| and/or
// |encoder|, e.g. to filter video frames in some way.
// If either |capturer| or |encoder| are reset then the video pipeline is not
// constructed.
virtual void OnCreateVideoCapturer(
scoped_ptr<webrtc::DesktopCapturer>* capturer);
virtual void OnCreateVideoEncoder(scoped_ptr<VideoEncoder>* encoder);
// Must return true if the HostExtensionSession needs the opportunity to
// modify the video pipeline.
virtual bool ModifiesVideoPipeline() const;
// Called when the host receives an |ExtensionMessage| for the |ClientSession|
// associated with this |HostExtensionSession|.
// It returns |true| if the message was handled, and |false| otherwise.
virtual bool OnExtensionMessage(
ClientSessionControl* client_session_control,
protocol::ClientStub* client_stub,
const protocol::ExtensionMessage& message) = 0;
};
} // namespace remoting
#endif // REMOTING_HOST_HOST_EXTENSION_SESSION_H_
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