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