| 1 |
kusanagi |
5.1 |
/************************************************************ |
| 2 |
|
|
* 11/9/2005 modified by david fedele to read buffer-data |
| 3 |
|
|
* instead raw-data-file |
| 4 |
|
|
************************************************************** |
| 5 |
|
|
|
| 6 |
|
|
* include needed system headers |
| 7 |
|
|
*/ |
| 8 |
kusanagi |
1.1 |
#include <stdio.h> /* include standard i/o library */ |
| 9 |
|
|
#include <stdlib.h> /* include standard library */ |
| 10 |
|
|
#include <string.h> /* include string library */ |
| 11 |
|
|
#include <unistd.h> /* include unix standard library */ |
| 12 |
|
|
#include <sys/types.h> /* */ |
| 13 |
|
|
#include <sys/stat.h> /* */ |
| 14 |
|
|
#include <fcntl.h> /* */ |
| 15 |
|
|
#include <errno.h> /* error simbol definitions */ |
| 16 |
|
|
#include <time.h> /* system time definitions */ |
| 17 |
|
|
#include <math.h> /* math library */ |
| 18 |
|
|
|
| 19 |
kusanagi |
5.1 |
/* looks for a DSP header beginning (a word beginning with 1110) */ |
| 20 |
kusanagi |
1.1 |
|
| 21 |
kusanagi |
5.1 |
/************************************************************ |
| 22 |
|
|
* 11/9/2005 modified by david fedele |
| 23 |
|
|
* void findstart_(int *error, int *fd)*/ |
| 24 |
|
|
void getbytes_(int *nbytes, char *buffer, int *p, unsigned int *value); |
| 25 |
kusanagi |
1.1 |
|
| 26 |
kusanagi |
5.1 |
void findstart_(int *error,char *buffer, int *len, int *curpos) |
| 27 |
|
|
{ |
| 28 |
|
|
char *buff=buffer; |
| 29 |
|
|
int nbytes2=2; |
| 30 |
|
|
/* int nread */ |
| 31 |
|
|
/* unsigned short word; */ |
| 32 |
|
|
/* unsigned short temp; */ |
| 33 |
|
|
unsigned int word; |
| 34 |
|
|
/***********************************************************/ |
| 35 |
kusanagi |
1.1 |
|
| 36 |
kusanagi |
5.1 |
*error=0; |
| 37 |
kusanagi |
1.1 |
do { |
| 38 |
kusanagi |
5.1 |
/************************************************************/ |
| 39 |
|
|
/* 11/9/2005 modified by david fedele */ |
| 40 |
|
|
/* nread=read(*fd, &word, 2); //reads 16 bits */ |
| 41 |
|
|
/* if(nread == 0) { */ |
| 42 |
|
|
/* // printf("findstart: Unexpected end of file %d at %d \n",*fd,nread); */ |
| 43 |
|
|
/* *error=1; */ |
| 44 |
|
|
/* return ; */ |
| 45 |
|
|
/* } */ |
| 46 |
|
|
/* if(nread != 2) { */ |
| 47 |
|
|
/* // printf("findstart: Error on reading: bytes read -> nread = %d \n",nread); */ |
| 48 |
|
|
/* *error=-1; */ |
| 49 |
|
|
/* return ; */ |
| 50 |
|
|
/* } */ |
| 51 |
|
|
|
| 52 |
|
|
/* /\*** corrects byte ***\/ //endianess... */ |
| 53 |
|
|
/* temp = word; */ |
| 54 |
|
|
/* word = ( (temp&0x00ff) << 8 ) | ( (temp&0xff00) >> 8 ); */ |
| 55 |
|
|
/* // printf("word %x , temp: %x: \n", word, temp);//??? */ |
| 56 |
|
|
|
| 57 |
|
|
/* /\*** goes back 8 bits ***\/ */ |
| 58 |
|
|
/* lseek(*fd, -1, SEEK_CUR); //SEEK_CUR ---> from current position */ |
| 59 |
|
|
|
| 60 |
|
|
/* // unsigned short num=lseek(*fd, -1, SEEK_CUR); //SEEK_CUR ---> from current position */ |
| 61 |
|
|
/* // printf("%i \n",num); */ |
| 62 |
|
|
|
| 63 |
|
|
getbytes_(&nbytes2,buff,curpos,&word); |
| 64 |
|
|
|
| 65 |
|
|
*curpos=*curpos-1; |
| 66 |
|
|
if(*curpos-1 > *len) { |
| 67 |
kusanagi |
6.1 |
printf("findstart: Unexpected end of file \n"); |
| 68 |
|
|
*error=1; |
| 69 |
|
|
return ; |
| 70 |
|
|
} |
| 71 |
kusanagi |
5.1 |
/***********************************************************/ |
| 72 |
|
|
|
| 73 |
|
|
} while ((word&0xf000) != 0xe000); |
| 74 |
|
|
|
| 75 |
|
|
/************************************************************/ |
| 76 |
|
|
/* 11/9/2005 modified by david fedele */ |
| 77 |
|
|
/* /\*** goes back 8 bits ***\/ */ |
| 78 |
|
|
/* lseek(*fd, -1, SEEK_CUR); */ |
| 79 |
|
|
*curpos=*curpos-1; |
| 80 |
kusanagi |
1.1 |
|
| 81 |
kusanagi |
5.1 |
/************************************************************/ |
| 82 |
kusanagi |
1.1 |
return; |
| 83 |
|
|
} |
Parent Directory
| 
Revision Log