// receiver.cpp,v 1.8 2003/11/08 02:15:54 yamuna Exp

#include "receiver.h"
#include "ace/Get_Opt.h"

static FILE *output_file = 0;
// File handle of the file into which received data is written.

static const char *output_file_name = "output";
// File name of the file into which received data is written.

int stats [BUFSIZ];
int stats_index = 0;

int start = 1;
ACE_Time_Value start_time;

double stats_avg ()
{
  double sum = 0;
  for (int i=0; i < stats_index; i++)
    {
      sum += stats [i];
    }
  return sum/stats_index;
}

void dump_stats (void)
{
  ACE_DEBUG ((LM_DEBUG,
	      "Dumping Stats....."));

  FILE* stats_file = ACE_OS::fopen ("Stats.dat", "w");
  if (stats_file == 0)
    {
      ACE_ERROR ((LM_ERROR,
		  "Stats.dat cannot be opened \n"));
    }

  // first dump what the caller has to say.
  ACE_OS::fprintf (stats_file, "Average Inter-Frame Arrival Time = %f msec\n",stats_avg ());

  for (int i = 0; i < stats_index; i++)
    ACE_OS::fprintf (stats_file, "%d\n",stats [i]);
  
  ACE_OS::fclose (stats_file);  

  ACE_DEBUG ((LM_DEBUG,
	      "Done\n"));

}

int
Receiver_StreamEndPoint::get_callback (const char *,
                                       TAO_AV_Callback *&callback)
{
  // Return the receiver application callback to the AVStreams for
  // future upcalls.
  callback = &this->callback_;
  return 0;
}

Receiver_Callback::Receiver_Callback (void)
  : frame_count_ (1)
{
}

int
Receiver_Callback::receive_frame (ACE_Message_Block *frame,
                                  TAO_AV_frame_info *,
                                  const ACE_Addr &)
{
  //
  // Upcall from the AVStreams when there is data to be received from
  // the sender.
  //
  ACE_DEBUG ((LM_DEBUG,
              "Receiver_Callback::receive_frame for frame %d\n",
              this->frame_count_++));
  


  if (start)
    {
      start_time = ACE_OS::gettimeofday ();
      start = 0;
    }
  else 
    {
      ACE_Time_Value elapsed_time = ACE_OS::gettimeofday () - start_time;
      stats [stats_index++] = elapsed_time.msec ();
      start_time = ACE_OS::gettimeofday ();
    }


  while (frame != 0)
    {
      // Write the received data to the file.
      size_t result =
        ACE_OS::fwrite (frame->rd_ptr (),
                        frame->length (),
                        1,
                        output_file);

      
      if (result == frame->length ())
        ACE_ERROR_RETURN ((LM_ERROR,
                           "Receiver_Callback::fwrite failed\n"),
                          -1);

      frame = frame->cont ();
    }



  return 0;
}

int
Receiver_Callback::handle_destroy (void)
{
  // Called when the distributer requests the stream to be shutdown.
  ACE_DEBUG ((LM_DEBUG,
              "Receiver_Callback::end_stream\n"));

  dump_stats ();

  ACE_TRY_NEW_ENV
    {
      TAO_AV_CORE::instance ()->orb ()->shutdown (0
                                                  ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;
    }
  ACE_CATCHANY
    {
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                           "Receiver_Callback::handle_destroy Failed\n");
      return -1;

    }
  ACE_ENDTRY;

  return 0;
}

Receiver::Receiver (void)
  : mmdevice_ (0)
{
}

Receiver::~Receiver (void)
{
}

int
Receiver::init (int,
                char **
                ACE_ENV_ARG_DECL)
{
  // Initialize the endpoint strategy with the orb and poa.
  int result =
    this->reactive_strategy_.init (TAO_AV_CORE::instance ()->orb (),
                                   TAO_AV_CORE::instance ()->poa ());
  if (result != 0)
    return result;

  // Register the receiver mmdevice object with the ORB
  ACE_NEW_RETURN (this->mmdevice_,
                  TAO_MMDevice (&this->reactive_strategy_),
                  -1);

  // Servant Reference Counting to manage lifetime
  PortableServer::ServantBase_var safe_mmdevice =
    this->mmdevice_;

  CORBA::Object_var mmdevice =
    this->mmdevice_->_this (ACE_ENV_SINGLE_ARG_PARAMETER);
  ACE_CHECK_RETURN (-1);

  // Register the mmdevice with the naming service.
  CosNaming::Name name (1);
  name.length (1);
  name [0].id =
    CORBA::string_dup ("Receiver");

  // Initialize the naming services
  if (this->naming_client_.init (TAO_AV_CORE::instance ()->orb ()) != 0)
    ACE_ERROR_RETURN ((LM_ERROR,
                       "Unable to initialize "
                       "the TAO_Naming_Client\n"),
                      -1);

  // Register the receiver object with the naming server.
  this->naming_client_->rebind (name,
                                mmdevice.in ()
                                ACE_ENV_ARG_PARAMETER);
  ACE_CHECK_RETURN (-1);

  return 0;
}

int
parse_args (int argc,
            char **argv)
{
  // Parse the command line arguments
  ACE_Get_Opt opts (argc,
                    argv,
                    "f:");

  int c;
  while ((c = opts ()) != -1)
    {
      switch (c)
        {
        case 'f':
          output_file_name = opts.opt_arg ();
          break;
        default:
          ACE_ERROR_RETURN ((LM_ERROR,
                             "Usage: receiver -f filename"),
                            -1);
        }
    }

  return 0;
}

int
main (int argc,
      char **argv)
{
  ACE_DECLARE_NEW_CORBA_ENV;
  ACE_TRY
    {
      // Initialize the ORB first.
      CORBA::ORB_var orb =
        CORBA::ORB_init (argc,
                         argv,
                         0
                         ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      CORBA::Object_var obj
        = orb->resolve_initial_references ("RootPOA"
                                           ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      // Get the POA_var object from Object_var.
      PortableServer::POA_var root_poa =
        PortableServer::POA::_narrow (obj.in ()
                                      ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      PortableServer::POAManager_var mgr
        = root_poa->the_POAManager (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;

      mgr->activate (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;

      // Initialize the AVStreams components.
      TAO_AV_CORE::instance ()->init (orb.in (),
                                      root_poa.in ()
                                      ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      int result =
        parse_args (argc,
                    argv);

      if (result == -1)
        return -1;

      // Make sure we have a valid <output_file>
      output_file = ACE_OS::fopen (output_file_name,
                                   "w");
      if (output_file == 0)
        ACE_ERROR_RETURN ((LM_DEBUG,
                           "Cannot open output file %s\n",
                           output_file_name),
                          -1);

      else
        ACE_DEBUG ((LM_DEBUG,
                    "File Opened Successfully\n"));

      Receiver receiver;
      result =
        receiver.init (argc,
                       argv
                       ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      if (result != 0)
        return result;

      orb->run (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;

      // Hack for now....
      ACE_OS::sleep (1);

      orb->destroy (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;


    }
  ACE_CATCHANY
    {
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,"receiver::init");
      return -1;
    }
  ACE_ENDTRY;
  ACE_CHECK_RETURN (-1);

  ACE_OS::fclose (output_file);

  return 0;
}

#if defined (ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION)
template class TAO_AV_Endpoint_Reactive_Strategy_B<Receiver_StreamEndPoint,TAO_VDev,AV_Null_MediaCtrl>;
template class TAO_AV_Endpoint_Reactive_Strategy<Receiver_StreamEndPoint,TAO_VDev,AV_Null_MediaCtrl>;
#elif defined (ACE_HAS_TEMPLATE_INSTANTIATION_PRAGMA)
#pragma instantiate TAO_AV_Endpoint_Reactive_Strategy_B<Receiver_StreamEndPoint,TAO_VDev,AV_Null_MediaCtrl>
#pragma instantiate TAO_AV_Endpoint_Reactive_Strategy<Receiver_StreamEndPoint,TAO_VDev,AV_Null_MediaCtrl>
#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION */
