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// Copyright (c) 2011 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.
#include "remoting/protocol/connection_to_client.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/message_loop_proxy.h"
#include "google/protobuf/message.h"
#include "net/base/io_buffer.h"
#include "remoting/protocol/client_control_sender.h"
#include "remoting/protocol/host_message_dispatcher.h"
#include "remoting/protocol/host_stub.h"
#include "remoting/protocol/input_stub.h"
// TODO(hclam): Remove this header once MessageDispatcher is used.
#include "remoting/base/compound_buffer.h"
namespace remoting {
namespace protocol {
// Determine how many update streams we should count to find the size of
// average update stream.
static const size_t kAverageUpdateStream = 10;
ConnectionToClient::ConnectionToClient(base::MessageLoopProxy* message_loop,
EventHandler* handler)
: message_loop_(message_loop),
handler_(handler),
host_stub_(NULL),
input_stub_(NULL),
control_connected_(false),
input_connected_(false),
video_connected_(false) {
DCHECK(message_loop_);
DCHECK(handler_);
}
ConnectionToClient::~ConnectionToClient() {
// TODO(hclam): When we shut down the viewer we may have to close the
// connection.
}
void ConnectionToClient::Init(protocol::Session* session) {
DCHECK(message_loop_->BelongsToCurrentThread());
session_.reset(session);
session_->SetStateChangeCallback(
base::Bind(&ConnectionToClient::OnSessionStateChange,
base::Unretained(this)));
}
protocol::Session* ConnectionToClient::session() {
return session_.get();
}
void ConnectionToClient::Disconnect() {
// This method can be called from main thread so perform threading switching.
if (!message_loop_->BelongsToCurrentThread()) {
message_loop_->PostTask(
FROM_HERE,
NewRunnableMethod(this, &ConnectionToClient::Disconnect));
return;
}
CloseChannels();
// If there is a session then release it, causing it to close.
if (session_.get())
session_.reset();
}
void ConnectionToClient::UpdateSequenceNumber(int64 sequence_number) {
handler_->OnSequenceNumberUpdated(this, sequence_number);
}
VideoStub* ConnectionToClient::video_stub() {
return video_writer_.get();
}
// Return pointer to ClientStub.
ClientStub* ConnectionToClient::client_stub() {
return client_control_sender_.get();
}
void ConnectionToClient::set_host_stub(protocol::HostStub* host_stub) {
host_stub_ = host_stub;
}
void ConnectionToClient::set_input_stub(protocol::InputStub* input_stub) {
input_stub_ = input_stub;
}
void ConnectionToClient::OnSessionStateChange(protocol::Session::State state) {
DCHECK(message_loop_->BelongsToCurrentThread());
DCHECK(handler_);
switch(state) {
case protocol::Session::CONNECTING:
// Don't care about this message.
break;
case protocol::Session::CONNECTED:
video_writer_.reset(
VideoWriter::Create(message_loop_, session_->config()));
video_writer_->Init(
session_.get(), base::Bind(&ConnectionToClient::OnVideoInitialized,
base::Unretained(this)));
break;
case protocol::Session::CONNECTED_CHANNELS:
client_control_sender_.reset(
new ClientControlSender(message_loop_, session_->control_channel()));
dispatcher_.reset(new HostMessageDispatcher());
dispatcher_->Initialize(this, host_stub_, input_stub_);
control_connected_ = true;
input_connected_ = true;
NotifyIfChannelsReady();
break;
case protocol::Session::CLOSED:
CloseChannels();
handler_->OnConnectionClosed(this);
break;
case protocol::Session::FAILED:
CloseOnError();
break;
default:
// We shouldn't receive other states.
NOTREACHED();
}
}
void ConnectionToClient::OnVideoInitialized(bool successful) {
if (!successful) {
LOG(ERROR) << "Failed to connect video channel";
CloseOnError();
return;
}
video_connected_ = true;
NotifyIfChannelsReady();
}
void ConnectionToClient::NotifyIfChannelsReady() {
if (control_connected_ && input_connected_ && video_connected_)
handler_->OnConnectionOpened(this);
}
void ConnectionToClient::CloseOnError() {
CloseChannels();
handler_->OnConnectionFailed(this);
}
void ConnectionToClient::CloseChannels() {
if (video_writer_.get())
video_writer_->Close();
if (client_control_sender_.get())
client_control_sender_->Close();
}
} // namespace protocol
} // namespace remoting
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