src/noarch/Sender.h (7eaa394) - Blinker · BlinkenArea

Sender.h

/* Blinker
   Copyright 2011 Stefan Schuermans <stefan@blinkenarea.org>
   Copyleft GNU public license - http://www.gnu.org/copyleft/gpl.html
   a blinkenarea.org project */

#ifndef SENDER_H
#define SENDER_H

#include <list>
#include <map>
#include <string>

#include <BlinkenLib/BlinkenProto.h>
#include <BlinkenLib/BlinkenFrame.h>

#include "CallMgr.h"
#include "Directory.h"
#include "File.h"
#include "IoCallee.h"
#include "Module.h"
#include "Protocol.h"
#include "SettingFile.h"
#include "StreamMgr.h"
#include "StreamRecv.h"
#include "Time.h"
#include "TimeCallee.h"

namespace Blinker {

/// stream sender
template<typename ADDR, typename SOCK>
class Sender: public IoCallee, public Module, public StreamRecv,
              public TimeCallee
{
protected:
  /// static destination
  class Dest;

/// static destination list entry
  struct DestEntry {
    std::string m_name;   ///< name of static destination
    Dest        *m_pDest; ///< static destination object
    DestEntry(const std::string &name); ///< constructor
  };

/// static destinations
  typedef std::list<DestEntry> DestList;

/// dynamic destinations: address -> time of last request
  typedef std::map<ADDR, Time> DynDests;

public:
  /**
   * @brief constructor
   * @param[in] callMgr callback manager
   * @param[in] streamMgr stream manager
   * @param[in] dirBase base directory
   */
  Sender(CallMgr &callMgr, StreamMgr &streamMgr, const Directory &dirBase);

/// virtual destructor
  virtual ~Sender();

private:
  /// copy constructor disabled
  Sender(const Sender &that);

/// assignment operator disabled
  const Sender & operator=(const Sender &that);

public:
  /// check for update of configuration
  virtual void updateConfig();

/**
   * @brief set current frame
   * @param[in] stream stream name
   * @param[in] pFrame current frame (NULL for none)
   */
  virtual void setFrame(const std::string &stream, stBlinkenFrame *pFrame);

/// callback when requsted time reached
  virtual void timeCall();

/**
   * @brief callback when I/O object is readable
   * @param[in] io I/O object that is readable
   */
  virtual void ioReadCall(Io *io);

/**
   * @brief callback when I/O object is writable
   * @param[in] io I/O object that is writable
   */
  virtual void ioWriteCall(Io *io);

protected:
  /// (re-)read protocol
  void readProto();

/// get input stream and attach to it
  void getInStream();

/// detach from input stream and release it
  void releaseInStream();

/// create socket and bind it
  void createSock();

/// destroy socket
  void destroySock();

/**
   * @brief light update of static destinations,
   *        i.e. stat all files in current static destination directory
   */
  void updateDestsLight();

/**
   * @brief full update of static destinations,
   *        i.e. scan files in playlist directory
   */
  void updateDestsFull();

/// remove timed-out dynamic destinations
  void removeTimedOutDynDests();

/// send current protocol data to all destinations
  void sendAllProto();

/// send "no frame" to all destinations
  void sendAllNoFrame();

/**
   * @brief send data to static/dynamic destinations
   * @param[in] data *pData protocol data to send
   */
  void sendDests(const std::string *pData);

/**
   * @brief send protocol data to address
   * @param[in] data protcol data of frame (empty if unknown)
   * @param[in] addr address to send to
   */
  void sendProto(const std::string &data, const ADDR &addr) const;

/**
   * @brief convert frame to protocol data
   * @param[in] pFrame frame (NULL for none)
   * @param[out] data protcol data
   */
  void frame2data(stBlinkenFrame *pFrame, std::string &data) const;

/// receive data from socket
  void receiveFromSock();

protected:
  SettingFile m_fileInStream; ///< input stream name file
  SettingFile m_fileBind;     ///< bind address file
  SettingFile m_fileProtocol; ///< protocol file
  Directory   m_dirDests;     ///< static destinations directory
  std::string m_nameInStream; ///< name of input stream
  Stream      *m_pInStream;   ///< input stream
  SOCK        *m_pSock;       ///< socket to use for sending streams
  Protocol    m_protocol;     ///< protocol
  bool        m_haveProtocol; ///< if protocol is known
  DestList    m_destList;     ///< static destinations
  DynDests    m_dynDests;     ///< dynamic destinations
  std::string m_noFrameData;  ///< "no frame" protocol data (empty if unknown)
  std::string m_data;         ///< current protocol data (empty if unknown)
}; // class Sender

} // namespace Blinker

#endif // #ifndef SENDER_H

Blinker

simplified sender module a lot, support only one protocol per instance