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// Copyright (c) 2010 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/host/client_connection.h"
#include "google/protobuf/message.h"
#include "media/base/data_buffer.h"
#include "remoting/base/protocol_decoder.h"
#include "remoting/base/protocol_util.h"
using media::DataBuffer;
namespace remoting {
// Determine how many update streams we should count to find the size of
// average update stream.
static const int kAverageUpdateStream = 10;
ClientConnection::ClientConnection(MessageLoop* message_loop,
ProtocolDecoder* decoder,
EventHandler* handler)
: loop_(message_loop),
decoder_(decoder),
size_in_queue_(0),
update_stream_size_(0),
handler_(handler) {
DCHECK(loop_);
DCHECK(decoder_.get());
DCHECK(handler_);
}
ClientConnection::~ClientConnection() {
// TODO(hclam): When we shut down the viewer we may have to close the
// jingle channel.
}
void ClientConnection::SendInitClientMessage(int width, int height) {
DCHECK_EQ(loop_, MessageLoop::current());
DCHECK(!update_stream_size_);
DCHECK(channel_.get());
HostMessage msg;
msg.mutable_init_client()->set_width(width);
msg.mutable_init_client()->set_height(height);
DCHECK(msg.IsInitialized());
channel_->Write(SerializeAndFrameMessage(msg));
}
void ClientConnection::SendBeginUpdateStreamMessage() {
DCHECK_EQ(loop_, MessageLoop::current());
DCHECK(channel_.get());
HostMessage msg;
msg.mutable_begin_update_stream();
DCHECK(msg.IsInitialized());
scoped_refptr<DataBuffer> data = SerializeAndFrameMessage(msg);
DCHECK(!update_stream_size_);
update_stream_size_ += data->GetDataSize();
channel_->Write(data);
}
void ClientConnection::SendUpdateStreamPacketMessage(
UpdateStreamPacketHeader* header,
scoped_refptr<DataBuffer> data) {
DCHECK_EQ(loop_, MessageLoop::current());
DCHECK(channel_.get());
HostMessage msg;
msg.mutable_update_stream_packet()->mutable_header()->CopyFrom(*header);
// TODO(hclam): This introduce one memory copy. Eliminate it.
msg.mutable_update_stream_packet()->set_data(
data->GetData(), data->GetDataSize());
DCHECK(msg.IsInitialized());
scoped_refptr<DataBuffer> encoded_data = SerializeAndFrameMessage(msg);
update_stream_size_ += data->GetDataSize();
channel_->Write(encoded_data);
}
void ClientConnection::SendEndUpdateStreamMessage() {
DCHECK_EQ(loop_, MessageLoop::current());
DCHECK(channel_.get());
HostMessage msg;
msg.mutable_end_update_stream();
DCHECK(msg.IsInitialized());
scoped_refptr<DataBuffer> data = SerializeAndFrameMessage(msg);
update_stream_size_ += data->GetDataSize();
channel_->Write(data);
// Here's some logic to help finding the average update stream size.
size_in_queue_ += update_stream_size_;
size_queue_.push_back(update_stream_size_);
if (size_queue_.size() > kAverageUpdateStream) {
size_in_queue_ -= size_queue_.front();
size_queue_.pop_front();
DCHECK_GE(size_in_queue_, 0);
}
update_stream_size_ = 0;
}
int ClientConnection::GetPendingUpdateStreamMessages() {
DCHECK_EQ(loop_, MessageLoop::current());
if (!size_queue_.size())
return 0;
int average_size = size_in_queue_ / size_queue_.size();
if (!average_size)
return 0;
return channel_->write_buffer_size() / average_size;
}
void ClientConnection::Disconnect() {
DCHECK_EQ(loop_, MessageLoop::current());
DCHECK(channel_.get());
channel_->Close();
}
void ClientConnection::OnStateChange(JingleChannel* channel,
JingleChannel::State state) {
DCHECK(channel);
loop_->PostTask(FROM_HERE,
NewRunnableMethod(this, &ClientConnection::StateChangeTask, state));
}
void ClientConnection::OnPacketReceived(JingleChannel* channel,
scoped_refptr<DataBuffer> data) {
DCHECK_EQ(channel_.get(), channel);
loop_->PostTask(FROM_HERE,
NewRunnableMethod(this, &ClientConnection::PacketReceivedTask, data));
}
void ClientConnection::StateChangeTask(JingleChannel::State state) {
DCHECK_EQ(loop_, MessageLoop::current());
DCHECK(handler_);
switch(state) {
case JingleChannel::CONNECTING:
break;
// Don't care about this message.
case JingleChannel::OPEN:
handler_->OnConnectionOpened(this);
break;
case JingleChannel::CLOSED:
handler_->OnConnectionClosed(this);
break;
case JingleChannel::FAILED:
handler_->OnConnectionFailed(this);
break;
default:
// We shouldn't receive other states.
NOTREACHED();
}
}
void ClientConnection::PacketReceivedTask(scoped_refptr<DataBuffer> data) {
DCHECK_EQ(loop_, MessageLoop::current());
// Use the decoder to parse incoming data.
DCHECK(decoder_.get());
ClientMessageList list;
decoder_->ParseClientMessages(data, &list);
// Then submit the messages to the handler.
DCHECK(handler_);
handler_->HandleMessages(this, &list);
}
} // namespace remoting
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