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mocchiut |
1.1 |
/************************************************************ |
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* 20/9/2005 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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#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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void unpacking(int ndata, unsigned short *output); |
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/************************************************************ |
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* 20/9/2005 modified by david fedele */ |
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/* void dunpacker_(int *l_buffer, unsigned short *buffer, int *error, int *fd) */ |
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void getbytes_(int *nbytes, char *buffer, int *p, unsigned int *value); |
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void dunpacker_(int *l_buffer, unsigned short *buff, int *error,char *buffer, int *len,int *curpos) |
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/**************************************************************/ |
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{ |
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int i; |
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int nhead; |
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nhead = 13; /* packed */ |
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*error=0; |
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/************************************************************ |
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* 20/9/2005 modified by david fedele */ |
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/* int nread; */ |
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/* unsigned int word; */ |
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/* nread=read(*fd, buffer, 2**l_buffer); */ |
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/* if( nread==0 ) { */ |
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/* printf("dunpacker: 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**l_buffer) { */ |
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/* printf("dunpacker: Error on reading: nread = %d \n",nread); */ |
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/* *error=-1; */ |
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/* return ; */ |
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/* } */ |
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/* /\*** correct byte ***\/ */ |
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/* for(i=0; i<*l_buffer; i++) { */ |
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/* word = buffer[i]; */ |
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/* buffer[i] = ( (word&0x00ff) << 8 ) | ( (word&0xff00) >> 8 ); */ |
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/* } */ |
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int nbytes2=2; |
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unsigned int word_temp; |
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unsigned short word[*l_buffer]; |
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if( *curpos+(2*(*l_buffer))-1>*len ) { |
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// printf("dunpacker: Unexpected end of file\n"); |
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*error=1; |
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return ; |
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} |
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for(i=0;i<*l_buffer;i++){ |
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getbytes_(&nbytes2,buffer,curpos,&word_temp); |
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word[i]=word_temp; |
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buff[i]=word[i]; |
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} |
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/*** unpacking buffer data ***/ |
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/************************************************************ |
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* 20/9/2005 modified by david fedele */ |
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/* if( nhead == 13) unpacking(*l_buffer, buffer); */ |
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if( nhead == 13) unpacking(*l_buffer, buff); |
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/**************************************************************/ |
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/* int num = (*l_buffer-13-1)/13*16+3;//??? */ |
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/* for( i=0; i<num; i++) printf("%i %x \n",i,buffer[i]);//??? */ |
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/*** Checksum ***/ |
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/* *oi = buffer; */ |
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/* word = 0; */ |
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/* for( i=0; i<*l_buffer; ++i) */ |
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/* word = (word + *oi++)& 0x03ff; */ |
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/* if( word == ( header[6] & 0x03ff ) ) */ |
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/* /\* printf("Check Sum OK \n")*\/ ; */ |
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/* else */ |
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/* printf("Wrong Check Sum: %x, %x \n",word,header[6]&0x03ff); */ |
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} |
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/*========================================================= */ |
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/*========================================================= */ |
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/* |
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* Routine to unpacking buffer file |
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* |
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*/ |
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/*========================================================= */ |
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/*========================================================= */ |
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void unpacking(int nwords, unsigned short *output) { |
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unsigned short out[nwords]; |
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int k; |
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unsigned short *oi, *oo, *o1; |
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for( k=0; k<nwords; ++k) |
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out[k]=0; |
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oo=output; |
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oi=out; |
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for( k=0; k<nwords; ++k) { |
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*oi++ = *oo; |
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*oo++ = 0; |
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} |
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oo=output; |
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oi=out; |
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for(k=0; k<nwords; k+=13) { |
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o1 = oi++; |
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*oo++ = (*o1 & 0xfff8) >> 3; |
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*oo++ = ( (*o1 & 0x0007) << 10 ) | ( (*oi & 0xffc0) >> 6); |
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o1 = oi++; |
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*oo++ = ( (*o1 & 0x003f) << 7 ) | ( (*oi & 0xfe00) >> 9); |
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o1 = oi++; |
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*oo++ = ( (*o1 & 0x01ff) << 4 ) | ( (*oi & 0xf000) >> 12); |
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o1 = oi++; |
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*oo++ = ( (*o1 & 0x0fff) << 1 ) | ( (*oi & 0x8000) >> 15); |
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*oo++ = (*oi & 0x7ffc) >> 2; |
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o1 = oi++; |
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*oo++ = ( (*o1 & 0x0003) << 11 ) | ( (*oi & 0xffe0) >> 5); |
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o1 = oi++; |
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*oo++ = ( (*o1 & 0x001f) << 8 ) | ( (*oi & 0xff00) >> 8); |
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o1 = oi++; |
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*oo++ = ( (*o1 & 0x00ff) << 5 ) | ( (*oi & 0xf800) >> 11); |
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o1 = oi++; |
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*oo++ = ( (*o1 & 0x07ff) << 2 ) | ( (*oi & 0xc000) >> 14); |
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*oo++ = (*oi & 0x3ffe) >> 1; |
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o1 = oi++; |
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*oo++ = ( (*o1 & 0x0001) << 12 ) | ( (*oi & 0xfff0) >> 4); |
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o1 = oi++; |
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*oo++ = ( (*o1 & 0x000f) << 9 ) | ( (*oi & 0xff80) >> 7); |
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o1 = oi++; |
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*oo++ = ( (*o1 & 0x007f) << 6 ) | ( (*oi & 0xfc00) >> 10); |
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o1 = oi++; |
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*oo++ = ( (*o1 & 0x03ff) << 3 ) | ( (*oi & 0xe000) >> 13); |
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*oo++ = *oi++ & 0x1fff; |
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} |
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return; |
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} |
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