defines.h

a file about net phone based on IP,write by VC++.

/*
   Talker - A small program which utilizes the Layer-3 codec (ACM) in windows for voice-over-IP
   Copyright (C) 1999 Dino Klein

   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. 

   This program is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or
   FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
   more details. 

   You should have received a copy of the GNU General Public License along with this
   program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
   MA 02139, USA.

   email: [e-mail]
*/

#ifndef __ZZ_DEFINES_H__
#define __ZZ_DEFINES_H__

#include <mmreg.h>


#pragma pack(1)

#define IN_PORT (unsigned short)53   // 6000
#define OUT_PORT (unsigned short)12000  // 6001
#define RT_CONNECTED (WM_USER + 250)
#define ST_SIZE (WM_USER + 251)
#define ST_SEQ (WM_USER + 252)
#define ST_ERR (WM_USER + 253)
#define ST_QUE (WM_USER + 254)

// keep 2 byte aligned because 16bit per sample is used;
// max value is 22050 and it is doubled to 44100 when stereo;
// input buffer size is 44100 tops;
// at 11026 it records a half of a second (plus a bit more :);
// smaller values will cause to waste of bandwidth
//#define RECORD_SIZE 22050 //7350 // 1/3


#define MAX_QUEUE 10
struct sound_sec
{
   int   size;
   char  data[4096];
};




struct MPEG_WFX
{
   WAVEFORMATEX  wfx;
   char          data [12];
};


struct SOUND_PACKET_HEADER
{
   unsigned short  uid;         // must be 0x5A5A
   unsigned short  ordinal_id;  // this will allow for conversation of up to 9.1 hours when no rolloever occours
   unsigned short  length;      // data length
   unsigned char   extra;       // low 4 bit: which block; high 4 bit: total blocks
//   unsigned short  total;       // total size of the one second playback
};






struct SOUND_PACKET
{
   SOUND_PACKET_HEADER  sph;
   char                 data [4096]; // 4kb of data, maximum
};

#endif