sender.h

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/* -*- C++ -*- */
// sender.h,v 1.7 2002/05/08 22:13:05 crodrigu Exp

// ============================================================================
//
// = LIBRARY
//    TAO/orbsvcs/tests/AVStreams/Component_Switching
//
// = FILENAME
//    sender.h
//
// = DESCRIPTION
//    This application reads data from a file and sends it to s
//    receiver.
//
// = AUTHOR
//    Yamuna Krishnamurthy <[e-mail]>
//
// ============================================================================

#include "Connection_Manager.h"
#include "orbsvcs/AV/AVStreams_i.h"
#include "orbsvcs/AV/Endpoint_Strategy.h"
#include "orbsvcs/AV/Protocol_Factory.h"

class Signal_Handler : public ACE_Event_Handler
{
  // TITLE
  //   This class Handles the SIGINT signal through the Reactor.
  //   Useful to gracefully release the process

public:

  Signal_Handler (void);

  int handle_signal(int signum, siginfo_t*,ucontext_t*);
  // Override this method to implement graceful shutdown.

};


class Sender_Callback : public TAO_AV_Callback
{
  // = TITLE
  //    Defines a class for the sender application callback.
  //
  // = DESCRIPTION
  //    This class overides the methods of the TAO_AV_Callback so the
  //    AVStreams can make upcalls to the application.

public:

  int handle_destroy (void);
  /// Called when the sender has finished reading the file and wants
  /// to close down the connection. Also called when the distributer
  /// tears down the connection when it switches to a new sender.

  ACE_CString &flowname (void);
  void flowname (const ACE_CString &flowname);
  /// Accessor methods for the flowname of the callback

private:
  ACE_CString flowname_;
  /// Flowname of the callback.
};

class Sender_StreamEndPoint : public TAO_Client_StreamEndPoint
{
  // = TITLE
  //    Defines a sender stream endpoint.
public:
  int get_callback (const char *flowname,
                    TAO_AV_Callback *&callback);
  /// Create the application callback and return its handle to
  /// AVStreams for further application callbacks.

  int set_protocol_object (const char *flowname,
                           TAO_AV_Protocol_Object *object);
  /// Set protocol object corresponding to the transport protocol
  /// chosen.

  CORBA::Boolean handle_preconnect (AVStreams::flowSpec &flowspec);
  /// Perform application specific actions before accepting new
  /// connections.

protected:
  Sender_Callback callback_;
  /// Application callback.
};

typedef TAO_AV_Endpoint_Reactive_Strategy_A
          <Sender_StreamEndPoint,
           TAO_VDev,
           AV_Null_MediaCtrl>
        SENDER_ENDPOINT_STRATEGY;

class Sender
{
  /// = TITLE
  //    Sender Application.
  //
  // = DESCRIPTION
  //    Class is responsible for streaming (and pacing) data to a
  //    receiver.
public:
  Sender (void);
  /// Constructor

  ~Sender (void);
  /// Destructor

  void shut_down (ACE_ENV_SINGLE_ARG_DECL_NOT_USED);

  int init (int argc,
            char **argv
            ACE_ENV_ARG_DECL_NOT_USED);
  /// Method to initialize the various data components.

  int pace_data (ACE_ENV_SINGLE_ARG_DECL_NOT_USED);
  /// Method to pace and send data from a file.

  Connection_Manager &connection_manager (void);
  /// Accessor to the connection manager.

private:
  int parse_args (int argc, char **argv);
  /// Method to parse the command line arguments.

  SENDER_ENDPOINT_STRATEGY endpoint_strategy_;
  /// The endpoint strategy used by the sender.

  TAO_MMDevice *sender_mmdevice_;
  /// The sender MMDevice.

  int frame_count_;
  /// Number of frames sent.

  ACE_CString filename_;
  /// File from which data is read.

  FILE *input_file_;
  /// File handle of the file read from.

  double frame_rate_;
  /// Rate at which the data will be sent.

  ACE_Message_Block mb_;
  /// Message block into which data is read from a file and then sent.

  ACE_CString sender_name_;
  /// Name of this sender.

  Connection_Manager connection_manager_;
  /// Connection manager.

  //  int stream_count_;
  /// Teh count of the number of streams that are active

  Signal_Handler signal_handler_;
  /// Reference to the signal handler.
};