Ballofsnow: New page:

 /*    Returns the audio type.    author: ballofsnow   date: 31 July 2007   license: none (public domain)   target: win32 (MINGW), recommend using the free IDE from bloodshed....

2007-08-01T03:41:43Z

New page: <pre><nowiki> /* Returns the audio type. author: ballofsnow date: 31 July 2007 license: none (public domain) target: win32 (MINGW), recommend using the free IDE from bloodshed....

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<pre><nowiki>
/*

Returns the audio type.

author: ballofsnow
date: 31 July 2007
license: none (public domain)
target: win32 (MINGW), recommend using the free IDE from bloodshed.net
version: beta 0.2

AC3 00000000 = 0x00
Unknown1 00100000 = 0x20
Mpeg-1 01000000 = 0x40
Mpeg-2ext 01100000 = 0x60
LPCM 10000000 = 0x80
Unknown2 10100000 = 0xA0
DTS 11000000 = 0xC0
SDDS 11100000 = 0xE0

Find the byte at offset 0x204 or decimal 516 of an IFO file.

*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <bitset>
using namespace std;

void usage(char *argv0);
unsigned char checkifo[12]= { 0x44, 0x56, 0x44, 0x56, 0x49, 0x44, 0x45, 0x4F, 0x2D, 0x56, 0x54, 0x53 }; /* DVDVIDEO-VTS */
unsigned char buffer[1024*1024];

int main (int argc, char **argv) {
FILE *ifo;
char *ifoname=NULL;
int rval;
printf ("Audio type analyzer\n");
printf ("beta 0.2, ballofsnow\n");
printf ("This software comes with no warranty.\n");
printf ("For help, run program with no parameters\n\n");

if (argc!=2) {
usage(argv[0]);
return 0;
}

/* LOAD AND VALIDATE THE IFO */
ifoname=argv[1];
if ((ifo=fopen(ifoname,"rb"))==NULL) {
printf ("[-] Failed to open IFO file \"%s\".\n", ifoname);
return -1;
}
// Source res is at offset 0x0200, or 512 decimal, 2 bytes.
// Audio type is at offset 0x0204, or 516 decimal, 1 byte.
fread(buffer,1,517,ifo);
if (memcmp(checkifo,buffer,12) != 0) {
printf ("This isn't an IFO file.\n");
free(buffer);
fclose(ifo);
usage(argv[0]);
return -1;
}
/* FINISHED VALIDATING */

/* MASK THE BYTE TO GET THE RELEVANT BITS */
bitset<CHAR_BIT> atype (buffer[516]);
atype &= 0xE0;

if (atype == 0x00) {
printf ("AC3\n");
rval=1;
}
else if (atype == 0x20) {
printf ("Unknown1\n");
rval=2;
}
else if (atype == 0x40) {
printf ("Mpeg-1\n");
rval=3;
}
else if (atype == 0x60) {
printf ("Mpeg-2ext\n");
rval=4;
}
else if (atype == 0x80) {
printf ("LPCM\n");
rval=5;
}
else if (atype == 0xA0) {
printf ("Unknown2\n");
rval=6;
}
else if (atype == 0xC0) {
printf ("DTS\n");
rval=7;
}
else if (atype == 0xE0) {
printf ("SDDS\n");
rval=8;
}

free(buffer); // ifo buffer
fclose(ifo);
return rval;
}

void usage(char *argv0) {
printf ("Usage: %s <VTS IFO file>\n\n", argv0);
printf ("Returns value to %%ERRORLEVEL%%.\n");
printf (" 1 - AC3\n");
printf (" 2 - Unknown1\n");
printf (" 3 - Mpeg-1\n");
printf (" 4 - Mpeg-2ext\n");
printf (" 5 - LPCM\n");
printf (" 6 - Unknown2\n");
printf (" 7 - DTS\n");
printf (" 8 - SDDS\n");
}
</nowiki></pre>

Anri-chan/Source/aud.cpp - Revision history

Ballofsnow: New page:
/* Returns the audio type. author: ballofsnow date: 31 July 2007 license: none (public domain) target: win32 (MINGW), recommend using the free IDE from bloodshed....