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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_MANAGER_H_
#define REMOTING_HOST_HOST_EXTENSION_SESSION_MANAGER_H_
#include <string>
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"
namespace webrtc {
class DesktopCapturer;
}
namespace remoting {
class ClientSessionControl;
class HostExtension;
class HostExtensionSession;
class VideoEncoder;
namespace protocol {
class ClientStub;
class ExtensionMessage;
}
// Helper class used to create and manage a set of HostExtensionSession
// instances depending upon the set of registered HostExtensions, and the
// set of capabilities negotiated between client and host.
class HostExtensionSessionManager {
public:
// Creates an extension manager for the specified |extensions|.
HostExtensionSessionManager(const std::vector<HostExtension*>& extensions,
ClientSessionControl* client_session_control);
virtual ~HostExtensionSessionManager();
// Returns the union of all capabilities supported by registered extensions.
std::string GetCapabilities();
// Calls the corresponding hook functions in each extension in turn, to give
// them an opportunity to wrap or replace video components.
scoped_ptr<webrtc::DesktopCapturer> OnCreateVideoCapturer(
scoped_ptr<webrtc::DesktopCapturer> capturer);
scoped_ptr<VideoEncoder> OnCreateVideoEncoder(
scoped_ptr<VideoEncoder> encoder);
// Handles completion of authentication and capabilities negotiation, creating
// the set of |HostExtensionSession| to match the client's capabilities.
void OnNegotiatedCapabilities(protocol::ClientStub* client_stub,
const std::string& capabilities);
// Passes |message| to each |HostExtensionSession| in turn until the message
// is handled, or none remain. Returns true if the message was handled.
bool OnExtensionMessage(const protocol::ExtensionMessage& message);
private:
typedef std::vector<HostExtension*> HostExtensionList;
typedef ScopedVector<HostExtensionSession> HostExtensionSessionList;
// Passed to HostExtensionSessions to allow them to send messages,
// disconnect the session, etc.
ClientSessionControl* client_session_control_;
protocol::ClientStub* client_stub_;
// List of HostExtensions to attach to the session, if it reaches the
// authenticated state.
HostExtensionList extensions_;
// List of HostExtensionSessions, used to handle extension messages.
HostExtensionSessionList extension_sessions_;
DISALLOW_COPY_AND_ASSIGN(HostExtensionSessionManager);
};
} // namespace remoting
#endif // REMOTING_HOST_HOST_EXTENSION_SESSION_MANAGER_H_
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