#dict is immutable -> therefore pmt_dict_add returns the new dict
d = pmt.pmt_dict_add(d, python_to_pmt(k), python_to_pmt(v))
return d
def numpy_to_blob(p):
p = p.view(numpy.uint8)
b = pmt.pmt_make_blob(len(p))
pmt.pmt_blob_data(b)[:] = p
return b
THE_TABLE = ( #python type, check pmt type, to python, from python
(None, pmt.pmt_is_null, lambda x: None, lambda x: pmt.PMT_NIL),
(bool, pmt.pmt_is_bool, pmt.pmt_to_bool, pmt.pmt_from_bool),
(str, pmt.pmt_is_symbol, pmt.pmt_symbol_to_string, pmt.pmt_string_to_symbol),
(int, pmt.pmt_is_integer, pmt.pmt_to_long, pmt.pmt_from_long),
(long, pmt.pmt_is_uint64, lambda x: long(pmt.pmt_to_uint64(x)), pmt.pmt_from_uint64),
(float, pmt.pmt_is_real, pmt.pmt_to_double, pmt.pmt_from_double),
(complex, pmt.pmt_is_complex, pmt.pmt_to_complex, pmt_from_complex),
(tuple, pmt.pmt_is_tuple, pmt_to_tuple, pmt_from_tuple),
(list, pmt.pmt_is_vector, pmt_to_vector, pmt_from_vector),
(dict, pmt.pmt_is_dict, pmt_to_dict, pmt_from_dict),
(numpy.ndarray, pmt.pmt_is_blob, pmt.pmt_blob_data, numpy_to_blob),
)
def pmt_to_python(p):
for python_type, pmt_check, to_python, from_python in THE_TABLE:
if pmt_check(p): return to_python(p)
return p #give up, we return the same
def python_to_pmt(p):
for python_type, pmt_check, to_python, from_python in THE_TABLE:
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 numpy_to_blob(p):
p = p.view(numpy.uint8)
b = pmt.pmt_make_blob(len(p))
pmt.pmt_blob_data(b)[:] = p
return b
THE_TABLE = ( #python type, check pmt type, to python, from python
(None, pmt.pmt_is_null, lambda x: None, lambda x: pmt.PMT_NIL),
(bool, pmt.pmt_is_bool, pmt.pmt_to_bool, pmt.pmt_from_bool),
(str, pmt.pmt_is_symbol, pmt.pmt_symbol_to_string,
pmt.pmt_string_to_symbol),
(int, pmt.pmt_is_integer, pmt.pmt_to_long, pmt.pmt_from_long),
(long, pmt.pmt_is_uint64, lambda x: long(pmt.pmt_to_uint64(x)),
pmt.pmt_from_uint64),
(float, pmt.pmt_is_real, pmt.pmt_to_double, pmt.pmt_from_double),
(complex, pmt.pmt_is_complex, pmt.pmt_to_complex, pmt_from_complex),
(tuple, pmt.pmt_is_tuple, pmt_to_tuple, pmt_from_tuple),
(list, pmt.pmt_is_vector, pmt_to_vector, pmt_from_vector),
(dict, pmt.pmt_is_dict, pmt_to_dict, pmt_from_dict),
(numpy.ndarray, pmt.pmt_is_blob, pmt.pmt_blob_data, numpy_to_blob),
)
def pmt_to_python(p):
for python_type, pmt_check, to_python, from_python in THE_TABLE:
if pmt_check(p): return to_python(p)
return p #give up, we return the same
