lets start with basic mp3 id3 tags


visit http://id3.org/ID3v1:
to learn more


mp3 id3 tags looks some thing like this:


typedef struct mp3_id3
{
char Tag[3];
char Song_Title[30];
char Artist[30] ;
char Album[30];
char Year[4];
char Comment[30];
char Genre[1];

}MP3Id3;


or

typedef struct mp3_id3
{
BYTE Tag[3];
BTYE Song_Title[30];
BTYE Artist[30] ;
BTYE Album[30];
BTYE Year[4];
BTYE Comment[30];
BTYE Genre[1];

}MP3Id3;



last 128bytes of an mp3 file contains the tags of an mp3 files

with an above info lets create a program to read the info from an mp3

so i wrote this little program with c language
:




#include <stdio.h>
#include <stdlib.h>
#include <string.h>



int in(char *item,char *mp);
int Len(char *items);
char *readit(char* src,int size);



typedef struct mp3_id3
{
char Tag[3];
char Song_Title[30];
char Artist[30] ;
char Album[30];
char Year[4];
char Comment[30];
char Genre[1];

}MP3Id3;


int main(int*argc,char **argv[])
{
//decl MP3Id3

MP3Id3 tag;

//Open mp3 file for test


FILE *file = fopen("3.mp3","r";



//check and seek to the last 128byte to read tags for our mp3 file

if((fseek(file,-128,SEEK_END)||fread(&tag,1,sizeof(tag),file)) !=1)
{
printf("ERROR WHILE PROCESSING MP3";
return 0;
}

fclose(file);



//check to find TAG to see if we had a vaild tag data
char *temp = (char*)malloc(3);
int i;
for(i=0;i<3;i++)
{
*(temp+i)=tag.Tag[i];
}
*(temp+3) = '\0';




if(in("TAG",temp)!=1)
{
printf("DUMPED DATA NOT VALID MP3 TAG or NO Tag on MP3 File \n";

}

free(temp);


printf("Artist Name : %s \n\n",readit(tag.Artist,sizeof(tag.Artist)));
printf("Album name : %s \n\n",readit(tag.Album,sizeof(tag.Album)));
printf("Album Year : %s \n\n",readit(tag.Year,sizeof(tag.Year)));
printf("Song Title : %s \n\n",readit(tag.Song_Title,sizeof(tag.Song_Title)));
printf("Track Comment : %s \n\n",readit(tag.Comment,sizeof(tag.Comment)));











return 0;

}


int in(char *item,char *mp)
{
int r,l,j=0,chk=0;
l = Len(mp);


for(r=0;r<Len(item);r++)
{

if(mp[j]==item[r])
{

chk+=1;
j+=1;



}
else
{
chk=0;
j=0;
}

if(chk==Len(mp))
{

break;
}



}


if(chk==Len(mp))
{
return 1;

}
else
{
return 0;

}

}//end of func in




int Len(char *items)
{
int i=0;
int ii=0;
while(i !=1)
{
char a = items[ii];
ii++;
if(a=='\0')
{
i=1;
};
}
return(ii-1);
}//len of a string


char *readit(char* src,int size)
{
char *dst;
//printf("%d ",size);
dst = (char*)malloc(size+1);
int i=0,s=0;

for(i=0;i<size;i++)
{
//printf("%d \n",*(src+i));
if(*(src+i)==32)
{
//break;

}
else
{
*(dst+s)=*(src+i);
s++;


}




}
*(dst+s)='\0';
return dst;
}



if u need help holla i will be here to guide u ;

tanx...

codeSavant:
tanx...

you are welcome

am writing update for my video converter this is some part of the code

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