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kusanagi |
5.1 |
/************************************************************ |
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* 11/9/2005 modified by david fedele to read buffer-data |
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* instead raw-data-file |
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************************************************************** |
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* include needed system headers |
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*/ |
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kusanagi |
1.1 |
#include <stdio.h> /* include standard i/o library */ |
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#include <stdlib.h> /* include standard library */ |
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#include <string.h> /* include string library */ |
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#include <unistd.h> /* include unix standard library */ |
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#include <sys/types.h> /* */ |
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#include <sys/stat.h> /* */ |
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#include <fcntl.h> /* */ |
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#include <errno.h> /* error simbol definitions */ |
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#include <time.h> /* system time definitions */ |
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#include <math.h> /* math library */ |
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kusanagi |
5.1 |
/* looks for a DSP header beginning (a word beginning with 1110) */ |
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kusanagi |
1.1 |
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kusanagi |
5.1 |
/************************************************************ |
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* 11/9/2005 modified by david fedele |
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* void findstart_(int *error, int *fd)*/ |
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void getbytes_(int *nbytes, char *buffer, int *p, unsigned int *value); |
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kusanagi |
1.1 |
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kusanagi |
5.1 |
void findstart_(int *error,char *buffer, int *len, int *curpos) |
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{ |
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char *buff=buffer; |
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int nbytes2=2; |
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/* int nread */ |
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/* unsigned short word; */ |
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/* unsigned short temp; */ |
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unsigned int word; |
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/***********************************************************/ |
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kusanagi |
1.1 |
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kusanagi |
5.1 |
*error=0; |
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kusanagi |
1.1 |
do { |
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kusanagi |
5.1 |
/************************************************************/ |
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/* 11/9/2005 modified by david fedele */ |
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/* nread=read(*fd, &word, 2); //reads 16 bits */ |
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/* if(nread == 0) { */ |
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/* // printf("findstart: Unexpected end of file %d at %d \n",*fd,nread); */ |
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/* *error=1; */ |
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/* return ; */ |
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/* } */ |
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/* if(nread != 2) { */ |
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/* // printf("findstart: Error on reading: bytes read -> nread = %d \n",nread); */ |
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/* *error=-1; */ |
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/* return ; */ |
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/* } */ |
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/* /\*** corrects byte ***\/ //endianess... */ |
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/* temp = word; */ |
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/* word = ( (temp&0x00ff) << 8 ) | ( (temp&0xff00) >> 8 ); */ |
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/* // printf("word %x , temp: %x: \n", word, temp);//??? */ |
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/* /\*** goes back 8 bits ***\/ */ |
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/* lseek(*fd, -1, SEEK_CUR); //SEEK_CUR ---> from current position */ |
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/* // unsigned short num=lseek(*fd, -1, SEEK_CUR); //SEEK_CUR ---> from current position */ |
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/* // printf("%i \n",num); */ |
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getbytes_(&nbytes2,buff,curpos,&word); |
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*curpos=*curpos-1; |
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if(*curpos-1 > *len) { |
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mocchiut |
6.2 |
// printf("findstart: Unexpected end of file \n"); |
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kusanagi |
6.1 |
*error=1; |
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return ; |
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} |
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kusanagi |
5.1 |
/***********************************************************/ |
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} while ((word&0xf000) != 0xe000); |
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/************************************************************/ |
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/* 11/9/2005 modified by david fedele */ |
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/* /\*** goes back 8 bits ***\/ */ |
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/* lseek(*fd, -1, SEEK_CUR); */ |
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*curpos=*curpos-1; |
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kusanagi |
1.1 |
|
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kusanagi |
5.1 |
/************************************************************/ |
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kusanagi |
1.1 |
return; |
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} |
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