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InetWvOut.h

/***************************************************/
/*! \class InetWvOut
    \brief STK internet streaming output class.

    This WvOut subclass can stream data over a network via a TCP or
    UDP socket connection.  The data is converted to big-endian byte
    order, if necessary, before being transmitted.

    InetWvOut supports multi-channel data.  It is important to
    distinguish the tick() methods, which output single samples to all
    channels in a sample frame, from the tickFrame() method, which
    takes a reference to multi-channel sample frame data.

    This class connects to a socket server, the port and IP address of
    which must be specified as constructor arguments.  The default
    data type is signed 16-bit integers but any of the defined
    StkFormats are permissible.

    by Perry R. Cook and Gary P. Scavone, 1995 - 2005.
*/
/***************************************************/

#ifndef STK_INETWVOUT_H
#define STK_INETWVOUT_H

#include "WvOut.h"
#include "Socket.h"

00029 class InetWvOut : public WvOut
{
 public:
  //! Default constructor ... the socket is not instantiated.
  InetWvOut( unsigned long packetFrames = 1024 );

  //! Overloaded constructor which opens a network connection during instantiation.
  /*!
    An StkError is thrown if a socket error occurs or an invalid argument is specified.
  */
  InetWvOut( int port, Socket::ProtocolType protocol = Socket::PROTO_TCP,
             std::string hostname = "localhost", unsigned int nChannels = 1, Stk::StkFormat format = STK_SINT16,
             unsigned long packetFrames = 1024 );

  //! Class destructor.
  ~InetWvOut();

  //! Connect to the specified host and port and prepare to stream \e nChannels of data in the given data format.
  /*!
    An StkError is thrown if a socket error occurs or an invalid argument is specified.
  */
  void connect( int port, Socket::ProtocolType protocol = Socket::PROTO_TCP,
                std::string hostname = "localhost", unsigned int nChannels = 1, Stk::StkFormat format = STK_SINT16 );

  //! If a connection is open, write out remaining samples in the queue and then disconnect.
  void disconnect(void);

 protected:

  void computeSample( const StkFloat sample );

  void computeFrames( const StkFrames& frames );

  void incrementFrame( void );

  // Write a buffer of length frames via the socket connection.
  void writeData( unsigned long frames );

  char *buffer_;
  Socket *soket_;
  unsigned long bufferFrames_;
  unsigned long bufferBytes_;
  unsigned long bufferIndex_;
  unsigned long iData_;
  unsigned int dataBytes_;
  Stk::StkFormat dataType_;
};

#endif

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