main.c

专门处理mp3文件的tag信息

/*
 *  MP3Tag - Add ID3 tags to MP3 files based on their filename
 *  Copyright (C)2000 Dave Ewart ([e-mail])
 *
 *  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.
 */

#include <stdio.h>
#include <ctype.h>
#include <unistd.h>
#include "defs.h"
#include "const.h"

extern int ShowVersion(void);
extern int ShowUsage(void);
extern int ShowCopy(void);
extern int AlreadyGotTag(FILE *somefile);
extern struct tagdata ReadTag(FILE *somefile);
extern int DisplayTag (struct tagdata sometag);
extern struct tagdata CreateTag (char *filename);
extern int WriteTag (struct tagdata sometag, FILE *somefile, int style);

int main (int argc, char *argv[])
{
   FILE *InputFile, *OutputFile;
   int z;
   int i;
   int j;
   long FileSize;
   char *a,*b,*c,*d,*e;
   char *filename;
   int genre, r;
   int verbose=1;
   int replace=0;
   int dummy=0;
   struct tagdata mytag;
   int myargs;
   int nfiles=0;
   int nskipped=0;

   /*
   printf("------\n");
   for (i=0;i<argc;i++) {
     printf("Arg %d is %s\n",i,argv[i]);
   }
   printf("------\n");
   while ((myargs=getopt(argc,argv,"+rqv"))!=EOF) {
     printf("Option is %c\n",myargs);
   }
   printf("------\n");
   printf("Optind is %d\n",optind);
   printf("------\n");
   for (i=optind;i<argc;i++) {
     printf("Filename parameter is %s\n",argv[i]);
   }
   printf("------\n");
   for (i=0;i<argc;i++) {
     printf("Arg %d is %s\n",i,argv[i]);
   }
   printf("------\n");
   */
   // filename=argv[argc-1];
 
   opterr=0;
   while ((myargs=getopt(argc,argv,"+qrvd"))!=EOF) {
     switch(myargs) {
       case '?': ShowCopy();
                 ShowUsage();
                 exit(0);
                 break;
       case 'q': verbose=0;
                 break;
       case 'v': verbose=2;
                 break;
       case 'r': replace=1;
                 break;
       case 'd': dummy=1;
                 break;
     }
   }

   if (argc-optind<1)
   {
     ShowCopy();
     ShowUsage();
     exit(0);
   }
   ShowVersion();

   for (j=optind;j<argc;j++) {
     filename=argv[j];

     if (!(InputFile=fopen (filename,"r")))
     {
        printf("- *** ERROR *** Cannot open %s.\n",filename);
        nskipped++;
     }
     else {
       if (verbose>0) {
         if (dummy==0) {
           printf("Processing file %s ...\n",filename);
         }
         else {
           printf("Dummy processing file %s ...\n",filename);
         }
       }
       nfiles++;
       r=AlreadyGotTag(InputFile);
       if (r==TAG_NOTFOUND) {
         if (verbose==2) {
           printf("- No ID3 tag present.  Creating new tag ...\n");
         }
         // DisplayTag(CreateTag(filename));
         fclose(InputFile);
         if (!(InputFile=fopen(filename,"a"))) {
           printf("- *** Cannot write to file.\n");
         }
         else {
           if (dummy==0) {
             WriteTag(CreateTag(filename),InputFile,WRITETAG_NEW);
           }
         }
       }
       else if (r==TAG_FOUND) {
         if (verbose==2) {
           printf("- ID3 tag found, ");
         }
         if (replace==0) {
           if (verbose==2) {
             printf("which will be kept.\n");
             DisplayTag(ReadTag(InputFile));
           }
         }
         else {
           if (verbose==2) {
             printf("which will be overwritten.\n");
           }
           //DisplayTag(CreateTag(filename));
           fclose(InputFile);
           if (!(InputFile=fopen(filename,"w"))) {
             printf("- *** Cannot write to file.\n");
           }
           else {
             if (dummy==0) {
               WriteTag(CreateTag(filename),InputFile,WRITETAG_REPLACE);
             }
           }
         }
       }
       else {
         printf("- *** Error detecting tag.\n");
       }
     }
   }
   printf("\nSummary:\n\nFiles procesed: %d\n",nfiles);
   if (nskipped>0) {
     printf("Files skipped:  %d\n",nskipped);
   }
   printf("\n");
   return(0);
}