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Voice API for Windows Operating Systems Library Reference — November 2003 317
play tone defined by TN_GEN structure — dx_playtone( )
!
!!
! Example
#include <stdio.h>
#include <srllib.h>
#include <dxxxlib.h>
#include <windows.h>
#define TID_1 101
main()
{
TN_GEN tngen;
DV_TPT tpt[ 5 ];
int dxxxdev;
/*
* Open the Voice Channel Device and Enable a Handler
*/
if ( ( dxxxdev = dx_open( "dxxxB1C1", NULL) ) == -1 ) {
perror( "dxxxB1C1" );
exit( 1 );
}
/*
* Describe a Simple Dual Tone Frequency Tone of 950-
* 1050 Hz and 475-525 Hz using leading edge detection.
*/
if ( dx_blddt( TID_1, 1000, 50, 500, 25, TN_LEADING ) == -1 ) {
printf( "Unable to build a Dual Tone Template\n" );
}
/*
* Bind the Tone to the Channel
*/
if ( dx_addtone( dxxxdev, NULL, 0 ) == -1 ) {
printf( "Unable to Bind the Tone %d\n", TID_1 );
printf( "Lasterror = %d Err Msg = %s\n",
ATDV_LASTERR( dxxxdev ), ATDV_ERRMSGP( dxxxdev ) );
dx_close( dxxxdev );
exit( 1 );
}
/*
* Enable Detection of ToneId TID_1
*/
if ( dx_enbtone( dxxxdev, TID_1, DM_TONEON | DM_TONEOFF ) == -1 ) {
printf( "Unable to Enable Detection of Tone %d\n", TID_1 );
printf( "Lasterror = %d Err Msg = %s\n",
ATDV_LASTERR( dxxxdev ), ATDV_ERRMSGP( dxxxdev ) );
dx_close( dxxxdev );
exit( 1 );
}
/*
* Build a Tone Generation Template.
* This template has Frequency1 = 1140,
* Frequency2 = 1020, amplitute at -10dB for
* both frequencies and duration of 100 * 10 msecs.
*/
dx_bldtngen( &tngen, 1140, 1020, -10, -10, 100 );
/*
* Set up the Terminating Conditions
*/
tpt[0].tp_type = IO_CONT;
tpt[0].tp_termno = DX_TONE;
tpt[0].tp_length = TID_1;