def addChirps(self,chirps=None,file=None): """Add chirps to the decoder for decoding Arguments: chirps -> An array or single chirp file -> An XML file containing the chirps""" self.chirps = ChirpList() #if not create it #if we have a file if (file!=None): chirps = self.loadChirpsFromXML(file) #if we don't have a file, check to see if we have chirps if chirps is not None: for c in chirps: self.chirps.append(c) self._maxChirp = 0 self._maxChirpLength = 0 for c in self.chirps: if sum(c.deltas) > self._maxChirp: self._maxChirp = sum(c.deltas[0:-1]) self._maxChirpWithEndPulse = sum(c.deltas) if len(c.deltas) > self._maxChirpLength: self._maxChirpLength = len(c.deltas[0:-1]) self._macChirpLengthWithEndPulse = sum(c.deltas)
class Decoder:
"""Base decoder class - doesn't actually decode anything!"""
def __init__(self, debug=False):
self.chirps = None
self.frames = None
self.subframes = None
self.symbols = None
self.debug = debug
if self.debug:
print "Initializing Decoder"
def addChirps(self,chirps=None,file=None):
"""Add chirps to the decoder for decoding
Arguments:
chirps -> An array or single chirp
file -> An XML file containing the chirps"""
self.chirps = ChirpList() #if not create it
#if we have a file
if (file!=None):
chirps = self.loadChirpsFromXML(file)
#if we don't have a file, check to see if we have chirps
if chirps is not None:
for c in chirps:
self.chirps.append(c)
self._maxChirp = 0
self._maxChirpLength = 0
for c in self.chirps:
if sum(c.deltas) > self._maxChirp:
self._maxChirp = sum(c.deltas[0:-1])
self._maxChirpWithEndPulse = sum(c.deltas)
if len(c.deltas) > self._maxChirpLength:
self._maxChirpLength = len(c.deltas[0:-1])
self._macChirpLengthWithEndPulse = sum(c.deltas)
def addSymbols(self,symbols=None,identifiers=None,file=None):
self.symbols, self.identifiers = symbols,identifiers
if identifiers is not None:
numPeaks = []
for i in identifiers:
numPeaks.append(i.numPeaks())
self.maxIdentifierPeaks = max(numPeaks)
def loadChirpsFromXML(self,file):
#open the XML file and read the chirps
#try:
doc = Parse(file)
chirptags = doc.xpath('//Chirp')
#except:
#raise Exception(message='Could not Parse the chirp XML file!')
for tag in chirptags:
self.chirps.appendUnique(Chirp.Chirp(xml=tag))
def addFrames(self,frames=None,file=None):
self.frames = {}
if frames is not None:
for frame in frames:
self.frames[frame.identifier.value] = frame
if file is not None:
self.loadFramesFromXML(file)
def loadFramesFromXML(self,file):
doc = Parse(file)
frametags = doc.xpath('//Frame')
frameObjects = []
for frametag in frametags:
#print frametag.childNodes[1].childNodes[1].childNodes
frameObjects.append(Frame.Frame(xml=frametag))
for frameObject in frameObjects:
self.frames.append(frameObject)
def addSubFrames(self,file):
self.subFrames = []
doc = Parse(file)
elements = doc.xpath('//SubFrame')
for element in elements:
self.subFrames.append(SubFrame.SubFrame(xml=element))
