tdemultimedia/noatun/library/titleproxy.h

/***************************************************************************
                     titleproxy.h  -  description
                        -------------------
begin                : Nov 20 14:35:18 CEST 2003
copyright            : (C) 2003 by Mark Kretschmann
email                :
***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef AMAROK_TITLEPROXY_H
#define AMAROK_TITLEPROXY_H

#include <kurl.h>             //stack allocated

#include <qobject.h>
#include <qserversocket.h>    //baseclass
#include <qsocket.h>          //stack allocated

class QString;

namespace TitleProxy
{
    /**
     * Proxy Concept:
     * 1. Connect to streamserver
     * 2. Listen on localhost, let aRts connect to proxyserver
     * 3. Write GET request to streamserver, containing Icy-MetaData:1 token
     * 4. Read MetaInt token from streamserver (==metadata offset)
     *
     * 5. Read stream data (mp3 + metadata) from streamserver
     * 6. Filter out metadata, send to app
     * 7. Write mp3 data to proxyserver
     * 8. Goto 5
     *
     * Some info on the shoutcast metadata protocol can be found at:
     * @see http://www.smackfu.com/stuff/programming/shoutcast.html
     *
     * @short A proxy server for extracting metadata from Shoutcast streams.
     */

    class Proxy : public QObject
    {
            Q_OBJECT
        public:
            Proxy( KURL url );
            ~Proxy();

            bool initSuccess() { return m_initSuccess; }
            KURL proxyUrl();

        signals:
				void metaData(
					const QString &streamName,
					const QString &streamGenre,
					const QString &streamUrl,
					const QString &streamBitrate,
					const QString &trackTitle,
					const QString &trackUrl);
            void proxyError();

        private slots:
            void accept( int socket );
            void connectToHost();
            void sendRequest();
            void readRemote();
            void connectError();

        private:
            bool processHeader( Q_LONG &index, Q_LONG bytesRead );
            void transmitData( const QString &data );
            void error();
            QString extractStr( const QString &str, const QString &key );

        //ATTRIBUTES:
            KURL m_url;
            int m_streamingMode;
            bool m_initSuccess;
            bool m_connectSuccess;

            int m_metaInt;
            QString m_bitRate;
            int m_byteCount;
            uint m_metaLen;

            QString m_metaData;
            bool m_headerFinished;
            QString m_headerStr;
            int m_usedPort;
            QString m_lastMetadata;
            bool m_icyMode;

            QString m_streamName;
            QString m_streamGenre;
            QString m_streamUrl;

            char *m_pBuf;

            QSocket m_sockRemote;
            QSocket m_sockProxy;
    };


    class Server : public QServerSocket
    {
            Q_OBJECT

        public:
            Server( Q_UINT16 port, QObject* parent )
                    : QServerSocket( port, 1, parent, "TitleProxyServer" ) {};

        signals:
            void connected( int socket );

        private:
            void newConnection( int socket ) { emit connected( socket ); }
    };

} //namespace TitleProxy

#endif /*AMAROK_TITLEPROXY_H*/