def pmt_to_tuple(p):
elems = list()
for i in range(pmt.pmt_length(p)):
elem = pmt.pmt_tuple_ref(p, i)
elems.append(pmt_to_python(elem))
return tuple(elems)
def parse_header(p, VERBOSE=False):
dump = pmt.PMT_NIL
info = dict()
if(pmt.pmt_is_dict(p) is False):
sys.stderr.write("Header is not a PMT dictionary: invalid or corrupt data file.\n")
sys.exit(1)
# GET FILE FORMAT VERSION NUMBER
if(pmt.pmt_dict_has_key(p, pmt.pmt_string_to_symbol("version"))):
r = pmt.pmt_dict_ref(p, pmt.pmt_string_to_symbol("version"), dump)
version = pmt.pmt_to_long(r)
if(VERBOSE):
print "Version Number: {0}".format(version)
else:
sys.stderr.write("Could not find key 'version': invalid or corrupt data file.\n")
sys.exit(1)
# EXTRACT SAMPLE RATE
if(pmt.pmt_dict_has_key(p, pmt.pmt_string_to_symbol("rx_rate"))):
r = pmt.pmt_dict_ref(p, pmt.pmt_string_to_symbol("rx_rate"), dump)
samp_rate = pmt.pmt_to_double(r)
info["rx_rate"] = samp_rate
if(VERBOSE):
print "Sample Rate: {0:.2f} sps".format(samp_rate)
else:
sys.stderr.write("Could not find key 'sr': invalid or corrupt data file.\n")
sys.exit(1)
# EXTRACT TIME STAMP
if(pmt.pmt_dict_has_key(p, pmt.pmt_string_to_symbol("rx_time"))):
r = pmt.pmt_dict_ref(p, pmt.pmt_string_to_symbol("rx_time"), dump)
pmt_secs = pmt.pmt_tuple_ref(r, 0)
pmt_fracs = pmt.pmt_tuple_ref(r, 1)
secs = float(pmt.pmt_to_uint64(pmt_secs))
fracs = pmt.pmt_to_double(pmt_fracs)
t = secs + fracs
info["rx_time"] = t
if(VERBOSE):
print "Seconds: {0:.6f}".format(t)
else:
sys.stderr.write("Could not find key 'time': invalid or corrupt data file.\n")
sys.exit(1)
# EXTRACT ITEM SIZE
if(pmt.pmt_dict_has_key(p, pmt.pmt_string_to_symbol("size"))):
r = pmt.pmt_dict_ref(p, pmt.pmt_string_to_symbol("size"), dump)
dsize = pmt.pmt_to_long(r)
info["size"] = dsize
if(VERBOSE):
print "Item size: {0}".format(dsize)
else:
sys.stderr.write("Could not find key 'size': invalid or corrupt data file.\n")
sys.exit(1)
# EXTRACT DATA TYPE
if(pmt.pmt_dict_has_key(p, pmt.pmt_string_to_symbol("type"))):
r = pmt.pmt_dict_ref(p, pmt.pmt_string_to_symbol("type"), dump)
dtype = pmt.pmt_to_long(r)
stype = ftype_to_string[dtype]
info["type"] = stype
if(VERBOSE):
print "Data Type: {0} ({1})".format(stype, dtype)
else:
sys.stderr.write("Could not find key 'type': invalid or corrupt data file.\n")
sys.exit(1)
# EXTRACT COMPLEX
if(pmt.pmt_dict_has_key(p, pmt.pmt_string_to_symbol("cplx"))):
r = pmt.pmt_dict_ref(p, pmt.pmt_string_to_symbol("cplx"), dump)
cplx = pmt.pmt_to_bool(r)
info["cplx"] = cplx
if(VERBOSE):
print "Complex? {0}".format(cplx)
else:
sys.stderr.write("Could not find key 'cplx': invalid or corrupt data file.\n")
sys.exit(1)
# EXTRACT WHERE CURRENT SEGMENT STARTS
if(pmt.pmt_dict_has_key(p, pmt.pmt_string_to_symbol("strt"))):
r = pmt.pmt_dict_ref(p, pmt.pmt_string_to_symbol("strt"), dump)
seg_start = pmt.pmt_to_uint64(r)
info["hdr_len"] = seg_start
info["extra_len"] = seg_start - HEADER_LENGTH
info["has_extra"] = info["extra_len"] > 0
if(VERBOSE):
print "Header Length: {0} bytes".format(info["hdr_len"])
print "Extra Length: {0}".format((info["extra_len"]))
print "Extra Header? {0}".format(info["has_extra"])
else:
sys.stderr.write("Could not find key 'strt': invalid or corrupt data file.\n")
sys.exit(1)
# EXTRACT SIZE OF DATA
if(pmt.pmt_dict_has_key(p, pmt.pmt_string_to_symbol("bytes"))):
r = pmt.pmt_dict_ref(p, pmt.pmt_string_to_symbol("bytes"), dump)
nbytes = pmt.pmt_to_uint64(r)
nitems = nbytes/dsize
info["nitems"] = nitems
info["nbytes"] = nbytes
if(VERBOSE):
print "Size of Data: {0} bytes".format(nbytes)
print " {0} items".format(nitems)
else:
sys.stderr.write("Could not find key 'size': invalid or corrupt data file.\n")
sys.exit(1)
return info
def pmt_to_tuple(p):
elems = list()
for i in range(pmt.pmt_length(p)):
elem = pmt.pmt_tuple_ref(p, i)
elems.append(pmt_to_python(elem))
return tuple(elems)
