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Added acknowledge to CameraTcpServer (a client must wait a response before sending images)

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git-svn-id: http://find-object.googlecode.com/svn/trunk/find_object@378 620bd6b2-0a58-f614-fd9a-1bd335dccda9
This commit is contained in:
matlabbe 2014-08-06 03:00:17 +00:00
parent 072f6cc8f5
commit da4ee8637b
4 changed files with 55 additions and 45 deletions
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22
src/CameraTcpServer.cpp
View File

@ -17,14 +17,11 @@ CameraTcpServer::CameraTcpServer(quint16 port, QObject *parent) :
QTcpServer(parent),
blockSize_(0)
{
this->setMaxPendingConnections(1);
if (!this->listen(QHostAddress::Any, port))
{
UERROR("Unable to start the Camera TCP server: %s", this->errorString().toStdString().c_str());
return;
}
connect(this, SIGNAL(newConnection()), this, SLOT(addClient()));
}
cv::Mat CameraTcpServer::getImage()
@ -83,22 +80,23 @@ quint16 CameraTcpServer::getPort() const
return this->serverPort();
}
void CameraTcpServer::addClient()
void CameraTcpServer::incomingConnection(int socketDescriptor)
{
QTcpSocket * client = this->nextPendingConnection();
QList<QTcpSocket*> clients = this->findChildren<QTcpSocket*>();
if(clients.size() > 1)
if(clients.size() >= 1)
{
UWARN("A client is already connected. Only one connection allowed at the same time.");
client->close();
client->deleteLater();
QTcpSocket socket;
socket.setSocketDescriptor(socketDescriptor);
}
else
{
connect(client, SIGNAL(readyRead()), this, SLOT(readReceivedData()));
connect(client, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(displayError(QAbstractSocket::SocketError)));
connect(client, SIGNAL(disconnected()), this, SLOT(connectionLost()));
QTcpSocket * socket = new QTcpSocket(this);
connect(socket, SIGNAL(readyRead()), this, SLOT(readReceivedData()));
connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(displayError(QAbstractSocket::SocketError)));
connect(socket, SIGNAL(disconnected()), this, SLOT(connectionLost()));
socket->setSocketDescriptor(socketDescriptor);
socket->write(QByteArray("1"));
}
}

6
src/CameraTcpServer.h
View File

@ -23,14 +23,14 @@ public:
QHostAddress getHostAddress() const;
quint16 getPort() const;
protected:
virtual void incomingConnection ( int socketDescriptor );
private Q_SLOTS:
void readReceivedData();
void displayError(QAbstractSocket::SocketError socketError);
void connectionLost();
private Q_SLOTS:
void addClient();
private:
quint64 blockSize_;
QVector<cv::Mat> images_;

2
tools/tcpImagesServer/main.cpp
View File

@ -99,7 +99,7 @@ int main(int argc, char * argv[])
}
server.connectToHost(ipAddress, port);
if(!server.waitForConnected())
if(!server.waitForReadyRead())
{
printf("ERROR: Unable to connect to %s:%d\n", ipAddress.toStdString().c_str(), port);
return -1;

18
tools/tcpRequest/main.cpp
View File

@ -148,6 +148,9 @@ int main(int argc, char * argv[])
QObject::connect(&response, SIGNAL(detectionReceived()), &app, SLOT(quit()));
QObject::connect(&response, SIGNAL(disconnected()), &app, SLOT(quit()));
QObject::connect(&request, SIGNAL(disconnected()), &app, SLOT(quit()));
QObject::connect(&response, SIGNAL(error(QAbstractSocket::SocketError)), &app, SLOT(quit()));
QObject::connect(&request, SIGNAL(error(QAbstractSocket::SocketError)), &app, SLOT(quit()));
request.connectToHost(ipAddress, portOut);
response.connectToHost(ipAddress, portIn);
@ -164,7 +167,6 @@ int main(int argc, char * argv[])
return -1;
}
// publish image
std::vector<unsigned char> buf;
cv::imencode(".png", image, buf);
@ -176,8 +178,11 @@ int main(int argc, char * argv[])
out.writeRawData((char*)buf.data(), (int)buf.size());
out.device()->seek(0);
out << (quint64)(block.size() - sizeof(quint64));
request.write(block);
printf("Image published, waiting for response...\n");
if(request.waitForReadyRead())
{
qint64 bytes = request.write(block);
printf("Image published (%d bytes), waiting for response...\n", (int)bytes);
QTime time;
time.start();
@ -218,6 +223,13 @@ int main(int argc, char * argv[])
else
{
printf("Failed to receive a response...\n");
return -1;
}
}
else
{
printf("Server is busy...\n");
return -1;
}
return 0;