73 lines
1.3 KiB
C
73 lines
1.3 KiB
C
/*
|
|
* magic.c
|
|
* ======= 26 Avril 2005
|
|
*
|
|
* reconnaissance heuristique des fichiers sons.
|
|
* Gruik coding inside.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <string.h>
|
|
#include "ecoute.h"
|
|
|
|
/*==------------------------------------------------------------------==*/
|
|
#define T_BUFF_MAGIC 222
|
|
|
|
int magic_detect(char *fname, long *pbits)
|
|
{
|
|
int fd;
|
|
char buffer[T_BUFF_MAGIC];
|
|
|
|
if ( (fd=open(fname, O_RDONLY)) < 0 )
|
|
{
|
|
perror(fname);
|
|
return -1;
|
|
}
|
|
if ( T_BUFF_MAGIC != read(fd, buffer, T_BUFF_MAGIC) )
|
|
{
|
|
close(fd);
|
|
return -2;
|
|
}
|
|
close(fd);
|
|
|
|
/* now, we have the first bytes of the file in the buffer, so we can
|
|
try the divination process... */
|
|
|
|
*pbits = 0L;
|
|
|
|
if (0 == strncmp(buffer, "RIFF", 4))
|
|
{
|
|
if (0 == strncmp(buffer+8, "WAVE", 4))
|
|
{
|
|
return SON_WAV;
|
|
}
|
|
}
|
|
|
|
if (0 == strncmp(buffer, ".snd", 4))
|
|
{
|
|
return SON_AU;
|
|
}
|
|
|
|
if (0 == strncmp(buffer, "OggS", 4))
|
|
{
|
|
if (0 == strncmp(buffer+28, "\x01vorbis", 7))
|
|
{
|
|
return SON_OGG;
|
|
}
|
|
if (0 == strncmp(buffer+28, "Speex ", 7))
|
|
{
|
|
return SON_SPEEX;
|
|
}
|
|
}
|
|
|
|
/* please add FLAC magic here XXX */
|
|
|
|
|
|
/* really don't know, baylout */
|
|
return SON_UNKNOW;
|
|
}
|
|
/*==------------------------------------------------------------------==*/
|
|
/*==------------------------------------------------------------------==*/
|