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/*
cfourcc.c - this is the main (and only) module.
cfourcc - change the FOURCC code in the Microsoft RIFF AVI file.
Copyright (C) 2004,2005,2014 Mohammad Hafiz bin Ismail (mypapit) <mypapit@gmail.com>
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Project's web : https://github.com/mypapit/cfourcc
*/
#include <getopt.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#define AVILEN 224
#define FLAG_INFO 0x0001
#define FLAG_DESC 0x0010
#define FLAG_USED 0x0100
#define FLAG_HELP 0x1000
#define FLAG_FORCE 0x10000
typedef char AVIHDR[AVILEN];
extern char *strdup (const char *);
int
getDesc (AVIHDR header, char *str)
{
memcpy (str, &header[0x70], 4);
return 0;
}
int
getUsed (AVIHDR header, char *str)
{
memcpy (str, &header[0xbc], 4);
return 0;
}
int
setDesc (AVIHDR header, const char *str)
{
memcpy (&header[0x70], str, 4);
return 0;
}
int
setUsed (AVIHDR header, const char *str)
{
memcpy (&header[0xbc], str, 4);
return 0;
}
int
usage (void)
{
puts
("usage :\n\tcfoucc [-i] file.avi\n\tcfourcc -u DIVX file.avi\n\tcfourcc -d DIVX file.avi\n\tcfourcc -h\n");
return 0;
}
int
main (int argc, char *argv[])
{
AVIHDR avihdr;
FILE *fin;
int optchar;
int flags = 0x00;
static char strused[5], strdesc[5];
char *ptrused = NULL, *ptrdesc = NULL;
char MAGIC[] = { 'R', 'I', 'F', 'F' };
memset (&avihdr, 0, AVILEN); /*init avihdr just in case! */
opterr = 0;
puts
("cfourcc 0.1.3.1 - (stupid) console fourcc changer\nCopyright (C) 2014 Mohammad Hafiz <mypapit@gmail.com>\nLicensed under the terms of the GNU General Public License version 2 (or later)\n");
while ((optchar = getopt (argc, argv, "d:u:ihf::")) != -1) {
switch (optchar) {
case 'i':
/* printf("print info\n");*/
flags |= FLAG_INFO;
break;
case 'f':
flags |= FLAG_FORCE;
break;
case 'd':
flags |= FLAG_DESC;
ptrdesc = (char *) strdup (optarg);
break;
case 'u':
flags |= FLAG_USED;
ptrused = (char *) strdup (optarg);
break;
case '?':
/* flags|=FLAG_HELP;*/
/*usage(); */
break;
case 'h':
flags |= FLAG_HELP;
usage ();
puts ("\t-h\t\t Prints this help ;)");
puts ("\t-i\t\t Prints FOURCC information (default)");
puts ("\t-f\t\t Force changing FOURCC on unsupported file (dangerous)");
puts ("\t-u CODE\t\t Sets FOURCC \'used\' codec");
puts ("\t-d CODE\t\t Sets FOURCC \'description\' codec\n");
puts ("\t ** refer to \'codeclist.txt\' documentation for a list of FOURCC\n\n");
break;
default:
return 0x0;
}
}
if (!((optind > 0) && (optchar = -1) && (argv[optind] != NULL))) {
if ((flags & FLAG_HELP) != FLAG_HELP)
usage ();
return 0x0f;
}
fin = fopen (argv[optind], "rb");
if (fin == NULL) {
fprintf (stderr, "Error : Cannot access %s\n", argv[optind]);
return 0x01;
}
if (fread (avihdr, sizeof (char), AVILEN, fin) < AVILEN) {
fprintf (stderr, "Error : Read end unexpectedly, incomplete file?\n");
return 0x02;
}
fclose (fin);
/*lazy verifier! */
if (memcmp (avihdr, MAGIC, 4) && !(flags & FLAG_FORCE) ) {
fprintf (stderr, "Error : Probably not a supported AVI or media file\n");
return 0x03;
}
if (flags == 0x0 || ( (flags & FLAG_INFO) == FLAG_INFO)) { /*default behaviour */
getDesc (avihdr, strdesc);
getUsed (avihdr, strused);
printf ("FOURCC of \'%s\' :\nDescription : %s\nUse : %s\n\n",
argv[optind], strdesc, strused);
return 0x00;
}
if (((flags & FLAG_USED) == FLAG_USED)
|| ((flags & FLAG_DESC) == FLAG_DESC)) {
fin = fopen (argv[optind], "r+b");
if (fin == NULL) {
fprintf (stderr, "Error : Cannot access %s for writing\n",
argv[optind]);
return 0x01;
}
if (flags & FLAG_USED)
setUsed (avihdr, ptrused);
if (flags & FLAG_DESC)
setDesc (avihdr, ptrdesc);
fseek (fin, 0, SEEK_SET);
fwrite (avihdr, sizeof (char), AVILEN, fin);
fflush (fin);
fclose (fin);
puts ("Attempting to change FOURCC value...\n");
}
puts ("Done.\n");
return 0;
}
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