unit1.~cpp

G722语音压缩算法

//---------------------------------------------------------------------------

#include <vcl.h>
#include <math.h>
#pragma hdrstop

#include "Unit1.h"
#include "g722.h"
#include "G722_Interface.h"

#define bufsize 160
#define N 200
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
    int i;
    static k=0;
    short datain[bufsize*N],dataout[bufsize*N];
    UINT16 Adpcm[bufsize];
    static int FirstRun = 1;

     Series1->Clear();
     for( i=0; i<(bufsize*N); i++,k++)
     {
         //datain[i]=32767*sin(20*k*M_PI/(bufsize*N));
         //datain[i] = 12767 + i;
         datain[i] = i;
         Series1->Add( datain[i], "", clTeeColor );
     }

     static  G722_Handle  Encode, Decode;
    for( i=0; i<N; i++ )
    {
       if(FirstRun)
       {
          G722_EncodeInit( &Encode );
          G722_DecodeInit( &Decode );
          FirstRun = 0;
       }
    //for( j=0; j<N; j++)
    //{
      G722_Encode( &Encode, datain+i*bufsize, Adpcm, bufsize );
      G722_Decode( &Decode, Adpcm, dataout+i*bufsize, bufsize );
    }

    Series2->Clear();
    for( i=0; i<(bufsize*N-22); i++ )
    {
       Series2->Add( dataout[i+22], "", clTeeColor );
    }
}
//---------------------------------------------------------------------------