VS2010 audio file compression call Lame_enc.dll convert WAV format to MP3

/*

My_lame.h

*/

#pragma once
#include "stdafx.h"
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include "BladeMP3EncDLL.h"
Class My_lame
{
Public
My_lame (void);
~my_lame (void);

Hinstancehdll;
Beinitstreambeinitstream;
Beencodechunkbeencodechunk;
Bedeinitstreambedeinitstream;
Beclosestreambeclosestream;
Beversionbeversion;
Bewritevbrheaderbewritevbrheader;
Bewriteinfotagbewriteinfotag;
int Km_convertmp3 ();
};

/*

My_lame.cpp

/*

#include "StdAfx.h"
#include "my_lame.h"
#include <string>
using namespace Std;
My_lame::my_lame (void)
{
Hdll=null;
Beinitstream=null;
Beencodechunk=null;
Bedeinitstream=null;
Beclosestream=null;
Beversion=null;
Bewritevbrheader=null;
Bewriteinfotag=null;
hDLL = LoadLibrary ("Lame_enc.dll");

}

My_lame::~my_lame (void)
{
FreeLibrary (hDLL);

}

int My_lame::km_convertmp3 ()
{

File*pfilein=null;
File*pfileout=null;
Be_versionversion={0,};
Be_configbeconfig={0,};

char* strfilein1= "F:\\1.wav";
char* strfileout1= "F:\\1.mp3";

dworddwsamples=0;
dworddwmp3buffer=0;
hbe_streamhbestream=0;
be_errerr=0;

Pbytepmp3buffer=null;
Pshortpwavbuffer=null;
The Load Lame_enc.dll Library (make sure though, you set the
Project/settings/debug working Directory correctly, otherwhise the DLL can ' t be loaded

hDLL = LoadLibrary ("Lame_enc.dll");

if (NULL = = hDLL)
{
hDLL = LoadLibrary ("Lame_enc.dll");
}

if (NULL = = hDLL)
{
fprintf (stderr, "Error loading Lame_enc. DLL ");
return-1;
}

Get Interface functions from the DLL
Beinitstream= (Beinitstream) GetProcAddress (hDLL, Text_beinitstream);
beencodechunk= (Beencodechunk) GetProcAddress (hDLL, text_beencodechunk);
Bedeinitstream= (Bedeinitstream) GetProcAddress (hDLL, Text_bedeinitstream);
Beclosestream= (Beclosestream) GetProcAddress (hDLL, Text_beclosestream);
beversion= (beversion) GetProcAddress (hDLL, text_beversion);
Bewritevbrheader= (Bewritevbrheader) GetProcAddress (Hdll,text_bewritevbrheader);
Bewriteinfotag = (Bewriteinfotag) GetProcAddress (Hdll,text_bewriteinfotag);

Check If all interfaces is present
if (!beinitstream | |!beencodechunk | |!bedeinitstream | |!beclosestream | |!beversion | |!bewritevbrheader)
{
printf ("Unable to get LAME interfaces");
return-1;
}

Get the version number
Beversion (&version);

printf
"Lame_enc.dll version%u.%0 2u (%u/%u/%u) \ n "
"Lame_enc Engine%u.%0 2u\n "
"Lame_enc homepage at%s\n\n",
Version.bydllmajorversion, Version.bydllminorversion,
Version.byday, Version.bymonth, Version.wyear,
Version.bymajorversion, Version.byminorversion,
Version.zhomepage);

Try to open the WAV file, being sure to open it as a binary file!

Pfilein = fopen (strFileIn1, "RB");

Check File Open Result
if (Pfilein = = NULL)
{
return-1;
}

Open MP3 File
pfileout= fopen (STRFILEOUT1, "wb+");

Check File Open Result
if (pfileout = = NULL)
{
fprintf (stderr, "Error creating file%s", STRFILEOUT1);
return-1;
}

memset (&beconfig,0,sizeof (Beconfig));//Clear all fields

Use the LAME config structure
Beconfig.dwconfig = Be_config_lame;

This is the default settings for Testcase.wav
Beconfig.format.lhv1.dwstructversion= 1;
beconfig.format.lhv1.dwstructsize= sizeof (beconfig);
beconfig.format.lhv1.dwsamplerate= 44100;//INPUT FREQUENCY
beconfig.format.lhv1.dwresamplerate= 0;//DON "T resample
Beconfig.format.lhv1.nmode= be_mp3_mode_jstereo;//OUTPUT in Streo
beconfig.format.lhv1.dwbitrate= 128;//MINIMUM BIT Rate
beconfig.format.lhv1.npreset= lqp_r3mix;//Quality PRESET SETTING
beconfig.format.lhv1.dwmpegversion= mpeg1;//MPEG VERSION (I or II)
beconfig.format.lhv1.dwpsymodel= 0;//use DEFAULT psychoacoustic MODEL
beconfig.format.lhv1.dwemphasis= 0;//NO emphasis turned on
beconfig.format.lhv1.boriginal= true;//SET ORIGINAL FLAG
beconfig.format.lhv1.bwritevbrheader= true;//Write INFO Tag

beconfig.format.lhv1.bnores= true;//No Bit resorvoir

Init the MP3 Stream
Err = Beinitstream (&beconfig, &dwsamples, &dwmp3buffer, &hbestream);

Check result
if (err! = be_err_successful)
{
fprintf (stderr, "Error opening encoding Stream (%lu)", err);
return-1;
}

Allocate MP3 Buffer
Pmp3buffer = new Byte[dwmp3buffer];

Allocate WAV Buffer
Pwavbuffer = new Short[dwsamples];

Check if Buffer is allocated properly
if (!pmp3buffer | |!pwavbuffer)
{
printf ("Out of Memory");
return-1;
}

DWORD dwread=0;
DWORD dwwrite=0;
DWORD dwdone=0;
DWORD dwfilesize=0;

Seek to end of file
Fseek (Pfilein,0,seek_end);

Get the file size
Dwfilesize=ftell (Pfilein);

Seek back to start of WAV file,
But skip the first to bytes, since that ' s the WAV header
Fseek (Pfilein,44,seek_set);

Convert All PCM samples
while ((Dwread=fread (pwavbuffer,sizeof (short), Dwsamples,pfilein)) >0)
{
Encode samples
Err = Beencodechunk (Hbestream, Dwread, Pwavbuffer, Pmp3buffer, &dwwrite);

Check result
if (err! = be_err_successful)
{
Beclosestream (Hbestream);
fprintf (stderr, "Beencodechunk () failed (%lu)", err);
return-1;
}

Write Dwwrite bytes That is returned in Tehe pmp3buffer to disk
if (fwrite (pmp3buffer,1,dwwrite,pfileout)! = dwwrite)
{
fprintf (stderr, "Output file write error");
return-1;
}

Dwdone + = dwread*sizeof (short);

printf ("Done:%0.2f%% \ r", * * (float) dwdone/(float) (dwfilesize));
}

Deinit the Stream
Err = Bedeinitstream (Hbestream, Pmp3buffer, &dwwrite);

Check result
if (err! = be_err_successful)
{

Beclosestream (Hbestream);
fprintf (stderr, "Beexitstream failed (%lu)", err);
return-1;
}

Is there any bytes returned from the DeInit?
If So, write them to disk
if (dwwrite)
{
if (Fwrite (Pmp3buffer, 1, dwwrite, pfileout)! = dwwrite)
{
fprintf (stderr, "Output file write error");
return-1;
}
}

Close the MP3 Stream
Beclosestream (Hbestream);

Delete WAV Buffer
delete [] pwavbuffer;

Delete MP3 Buffer
delete [] pmp3buffer;

Close input File
Fclose (Pfilein);

Close output File
Fclose (pfileout);

if (Bewriteinfotag)
{
Write the INFO Tag
Change
Bewriteinfotag (Hbestream, strfileout);
Bewriteinfotag (Hbestream, STRFILEOUT1);
}
Else
{

Change
Bewritevbrheader (strfileout);
Bewritevbrheader (STRFILEOUT1);
}

return 0;
}

int _tmain (int argc, _tchar* argv[])
{
My_lame lame;
Lame.km_convertmp3 ();

return 0;
}

Then add the DLL file, the corresponding settings, you can.

VS2010 audio file compression call Lame_enc.dll convert WAV format to MP3