def tag_to_pmt(tag):
""" Convert a Python-readable object to a stream tag """
newtag = gr.tag_t()
newtag.offset = tag.offset
newtag.key = pmt.to_python(tag.key)
newtag.value = pmt.from_python(tag.value)
newtag.srcid = pmt.from_python(tag.srcid)
return newtag
def tag_to_pmt(tag):
""" Convert a Python-readable object to a stream tag """
newtag = gr.tag_t()
newtag.offset = tag.offset
newtag.key = pmt.to_python(tag.key)
newtag.value = pmt.from_python(tag.value)
newtag.srcid = pmt.from_python(tag.srcid)
return newtag
def python_to_tag(tag_struct):
"""
Convert a Python list/tuple/dictionary to a stream tag.
When using a list or tuple format, this function expects the format:
tag_struct[0] --> tag's offset (as an integer)
tag_struct[1] --> tag's key (as a PMT)
tag_struct[2] --> tag's value (as a PMT)
tag_struct[3] --> tag's srcid (as a PMT)
When using a dictionary, we specify the dictionary keys using:
tag_struct['offset'] --> tag's offset (as an integer)
tag_struct['key'] --> tag's key (as a PMT)
tag_struct['value'] --> tag's value (as a PMT)
tag_struct['srcid'] --> tag's srcid (as a PMT)
If the function can take the Python object and successfully
construct a tag, it will return the tag. Otherwise, it will return
None.
"""
good = False
tag = gr.tag_t()
if(type(tag_struct) == dict):
if(tag_struct.has_key('offset')):
if(isinstance(tag_struct['offset'], (int,long))):
tag.offset = tag_struct['offset']
good = True
if(tag_struct.has_key('key')):
if(isinstance(tag_struct['key'], pmt.pmt_swig.swig_int_ptr)):
tag.key = tag_struct['key']
good = True
if(tag_struct.has_key('value')):
if(isinstance(tag_struct['value'], pmt.pmt_swig.swig_int_ptr)):
tag.value = tag_struct['value']
good = True
if(tag_struct.has_key('srcid')):
if(isinstance(tag_struct['srcid'], pmt.pmt_swig.swig_int_ptr)):
tag.srcid = tag_struct['srcid']
good = True
elif(type(tag_struct) == list or type(tag_struct) == tuple):
if(len(tag_struct) == 4):
if(isinstance(tag_struct[0], (int,long))):
tag.offset = tag_struct[0]
good = True
if(isinstance(tag_struct[1], pmt.pmt_swig.swig_int_ptr)):
tag.key = tag_struct[1]
good = True
if(isinstance(tag_struct[2], pmt.pmt_swig.swig_int_ptr)):
tag.value = tag_struct[2]
good = True
if(isinstance(tag_struct[3], pmt.pmt_swig.swig_int_ptr)):
tag.srcid = tag_struct[3]
good = True
elif(len(tag_struct) == 3):
if(isinstance(tag_struct[0], (int,long))):
tag.offset = tag_struct[0]
good = True
if(isinstance(tag_struct[1], pmt.pmt_swig.swig_int_ptr)):
tag.key = tag_struct[1]
good = True
if(isinstance(tag_struct[2], pmt.pmt_swig.swig_int_ptr)):
tag.value = tag_struct[2]
good = True
tag.srcid = pmt.PMT_F
if(good):
return tag
else:
return None
