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include <mach.h>
include <imhdr.h>
include <fset.h>
include "vt.h"
define WDSBRSTR 50
# READSS1 -- Read a type 1 sector scan from tape and format into 3 iraf images.
# Type one sector scans consist of three images packed into 32 bits per
# pixel. The three images are 1. velocity (12 bits) 2. select (12 bits) and
# 3. continuum intensity (8 bits). The images are only 256 pixels high as
# opposed to 512 pixels high for the other scans.
procedure readss1 (inputfd, filenumber, brief, select, bright, velocity, hs)
int inputfd # file descriptor for input (usually tape)
int filenumber # file number on tape
bool brief # short output file names
bool select # flag to make select image
bool bright # flag to make bright image
bool velocity # flag to make velocity image
int hs # header data structure pointer
char velimage[SZ_FNAME] # Velocity image
char selimage[SZ_FNAME] # Select image
char britimage[SZ_FNAME] # Brightness image
short u[SWTH_HIGH], dat
int date, hour, minute, seconds, i, j, num, lrs
pointer velim, selim, britim, velsrp, selsrp, britsrp
int read()
pointer immap(), impl2s()
errchk immap, impl2s
begin
# Calculate the time. Assemble the output image names.
hour = int(VT_HTIME(hs)/3600)
minute = int((VT_HTIME(hs) - hour * 3600)/60)
seconds = int(VT_HTIME(hs) - hour * 3600 - minute * 60)
if (brief) {
call sprintf (velimage[1], SZ_FNAME, "v%03d")
call pargi (filenumber)
call sprintf (selimage[1], SZ_FNAME, "s%03d")
call pargi (filenumber)
call sprintf (britimage[1], SZ_FNAME, "b%03d")
call pargi (filenumber)
} else {
call sprintf (velimage[1], SZ_FNAME, "v%02d_%02d%02d_%03d")
call pargi (VT_HDAY(hs)) # day of month
call pargi (hour)
call pargi (minute)
call pargi (filenumber)
call sprintf (selimage[1], SZ_FNAME, "s%02d_%02d%02d_%03d")
call pargi (VT_HDAY(hs)) # day of month
call pargi (hour)
call pargi (minute)
call pargi (filenumber)
call sprintf (britimage[1], SZ_FNAME, "b%02d_%02d%02d_%03d")
call pargi (VT_HDAY(hs)) # day of month
call pargi (hour)
call pargi (minute)
call pargi (filenumber)
}
if (select) {
selim = immap (selimage, NEW_IMAGE, 0)
IM_NDIM(selim) = 2
IM_LEN(selim,1) = SWTH_HIGH/2
IM_LEN(selim,2) = VT_HNUMCOLS(hs)
IM_PIXTYPE(selim) = TY_SHORT
call imaddi (selim, "obs_time", VT_HTIME(hs))
date = VT_HMONTH(hs) * 10000 + VT_HDAY(hs) * 100 + VT_HYEAR(hs)
call imaddi (selim, "obs_date", date )
call imaddi (selim, "wv_lngth", VT_HWVLNGTH(hs))
call imaddi (selim, "obs_type", VT_HOBSTYPE(hs))
call imaddi (selim, "av_intns", VT_HAVINTENS(hs))
call imaddi (selim, "num_cols", VT_HNUMCOLS(hs))
call imaddi (selim, "intg/pix", VT_HINTGPIX(hs))
call imaddi (selim, "rep_time", VT_HREPTIME(hs))
}
if (bright) {
britim = immap (britimage, NEW_IMAGE, 0)
IM_NDIM(britim) = 2
IM_LEN(britim,1) = SWTH_HIGH/2
IM_LEN(britim,2) = VT_HNUMCOLS(hs)
IM_PIXTYPE(britim) = TY_SHORT
call imaddi (britim, "obs_time", VT_HTIME(hs))
date = VT_HMONTH(hs) * 10000 + VT_HDAY(hs) * 100 + VT_HYEAR(hs)
call imaddi (britim, "obs_date", date )
call imaddi (britim, "wv_lngth", VT_HWVLNGTH(hs))
call imaddi (britim, "obs_type", VT_HOBSTYPE(hs))
call imaddi (britim, "av_intns", VT_HAVINTENS(hs))
call imaddi (britim, "num_cols", VT_HNUMCOLS(hs))
call imaddi (britim, "intg/pix", VT_HINTGPIX(hs))
call imaddi (britim, "rep_time", VT_HREPTIME(hs))
}
if (velocity) {
velim = immap (velimage, NEW_IMAGE, 0)
IM_NDIM(velim) = 2
IM_LEN(velim,1) = SWTH_HIGH/2
IM_LEN(velim,2) = VT_HNUMCOLS(hs)
IM_PIXTYPE(velim) = TY_SHORT
call imaddi (velim, "obs_time", VT_HTIME(hs))
date = VT_HMONTH(hs) * 10000 + VT_HDAY(hs) * 100 + VT_HYEAR(hs)
call imaddi (velim, "obs_date", date )
call imaddi (velim, "wv_lngth", VT_HWVLNGTH(hs))
call imaddi (velim, "obs_type", VT_HOBSTYPE(hs))
call imaddi (velim, "av_intns", VT_HAVINTENS(hs))
call imaddi (velim, "num_cols", VT_HNUMCOLS(hs))
call imaddi (velim, "intg/pix", VT_HINTGPIX(hs))
call imaddi (velim, "rep_time", VT_HREPTIME(hs))
}
do j = 1, VT_HNUMCOLS(hs) {
if (select)
selsrp = impl2s (selim, j)
if (bright)
britsrp = impl2s (britim, j)
if (velocity)
velsrp = impl2s (velim, j)
iferr (num = read (inputfd, u, SWTH_HIGH*SZB_SHORT/SZB_CHAR)) {
call fseti (inputfd, F_VALIDATE, lrs*SZB_SHORT/SZB_CHAR)
call eprintf ("Error on tape read.\n")
num = read (inputfd, u, SWTH_HIGH*SZB_SHORT/SZB_CHAR)
}
lrs = num
if (num < SWTH_HIGH*SZB_SHORT/SZB_CHAR)
call error (0, "eof encountered when reading file")
if (BYTE_SWAP2 == YES)
call bswap2 (u, 1, u, 1, SWTH_HIGH * SZB_SHORT)
# Unpack the data into the three arrays.
do i = 257, 512 {
if (select) {
dat = u[i]/16
if (u[i] < 0)
dat = dat - 1
Mems[selsrp+i-257] = dat
}
if (bright)
Mems[britsrp+i-257] = and(int(u[i]),17B)*16
}
do i = 1, 256 {
if (velocity) {
dat = u[i]/16
if (u[i] < 0)
dat = dat - 1
Mems[velsrp+i-1] = dat
}
if (bright)
Mems[britsrp+i-1] = Mems[britsrp+i-1]+and(int(u[i]),17B)
}
}
# Unmap images.
if (select)
call imunmap (selim)
if (velocity)
call imunmap (velim)
if (bright)
call imunmap (britim)
end
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