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'''
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Created on 23/01/2012
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@author $Author$
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@version $Id$
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'''
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import os, sys
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import numpy
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import glob
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import fnmatch
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import time, datetime
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path = os.path.split(os.getcwd())[0]
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sys.path.append(path)
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from Model.JROHeader import *
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from Model.Voltage import Voltage
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from IO.DataIO import JRODataReader
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from IO.DataIO import JRODataWriter
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class VoltageReader(JRODataReader):
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"""
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Esta clase permite leer datos de voltage desde archivos en formato rawdata (.r). La lectura
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de los datos siempre se realiza por bloques. Los datos leidos (array de 3 dimensiones:
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perfiles*alturas*canales) son almacenados en la variable "buffer".
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perfiles * alturas * canales
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Esta clase contiene instancias (objetos) de las clases BasicHeader, SystemHeader,
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RadarControllerHeader y Voltage. Los tres primeros se usan para almacenar informacion de la
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cabecera de datos (metadata), y el cuarto (Voltage) para obtener y almacenar un perfil de
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datos desde el "buffer" cada vez que se ejecute el metodo "getData".
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Example:
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dpath = "/home/myuser/data"
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startTime = datetime.datetime(2010,1,20,0,0,0,0,0,0)
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endTime = datetime.datetime(2010,1,21,23,59,59,0,0,0)
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readerObj = VoltageReader()
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readerObj.setup(dpath, startTime, endTime)
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while(True):
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#to get one profile
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profile = readerObj.getData()
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#print the profile
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print profile
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#If you want to see all datablock
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print readerObj.datablock
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if readerObj.flagNoMoreFiles:
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break
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"""
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m_DataObj = None
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idProfile = 0
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datablock = None
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pts2read = 0
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utc = 0
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ext = ".r"
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optchar = "D"
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def __init__(self, m_Voltage=None):
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"""
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Inicializador de la clase VoltageReader para la lectura de datos de voltage.
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Input:
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m_Voltage : Objeto de la clase Voltage. Este objeto sera utilizado para
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almacenar un perfil de datos cada vez que se haga un requerimiento
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(getData). El perfil sera obtenido a partir del buffer de datos,
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si el buffer esta vacio se hara un nuevo proceso de lectura de un
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bloque de datos.
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Si este parametro no es pasado se creara uno internamente.
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Variables afectadas:
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self.m_DataObj
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Return:
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None
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"""
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if m_Voltage == None:
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m_Voltage = Voltage()
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if not(isinstance(m_Voltage, Voltage)):
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raise ValueError, "in VoltageReader, m_Voltage must be an Voltage class object"
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self.m_DataObj = m_Voltage
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def __hasNotDataInBuffer(self):
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if self.datablockIndex >= self.m_ProcessingHeader.profilesPerBlock:
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return 1
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return 0
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def getBlockDimension(self):
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"""
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Obtiene la cantidad de puntos a leer por cada bloque de datos
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Affected:
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self.pts2read
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self.blocksize
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Return:
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None
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"""
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self.pts2read = self.m_ProcessingHeader.profilesPerBlock * self.m_ProcessingHeader.numHeights * self.m_SystemHeader.numChannels
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self.blocksize = self.pts2read
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self.m_DataObj.nProfiles = self.m_ProcessingHeader.profilesPerBlock
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def readBlock(self):
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"""
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readBlock lee el bloque de datos desde la posicion actual del puntero del archivo
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(self.fp) y actualiza todos los parametros relacionados al bloque de datos
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(metadata + data). La data leida es almacenada en el buffer y el contador del buffer
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es seteado a 0
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Inputs:
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None
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Return:
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None
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Affected:
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self.datablockIndex
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self.datablock
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self.flagIsNewFile
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self.idProfile
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self.flagIsNewBlock
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self.nReadBlocks
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Exceptions:
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Si un bloque leido no es un bloque valido
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"""
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blockOk_flag = False
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fpointer = self.fp.tell()
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junk = numpy.fromfile( self.fp, self.dataType, self.pts2read )
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if self.online:
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if junk.size != self.blocksize:
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for nTries in range( self.nTries ):
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print "\tWaiting %0.2f sec for the next block, try %03d ..." % (self.delay, nTries+1)
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time.sleep( self.delay )
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self.fp.seek( fpointer )
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fpointer = self.fp.tell()
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junk = numpy.fromfile( self.fp, self.dataType, self.pts2read )
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if junk.size == self.blocksize:
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blockOk_flag = True
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break
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if not( blockOk_flag ):
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return 0
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try:
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junk = junk.reshape( (self.m_ProcessingHeader.profilesPerBlock, self.m_ProcessingHeader.numHeights, self.m_SystemHeader.numChannels) )
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except:
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print "Data file %s is invalid" % self.filename
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return 0
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junk = numpy.transpose(junk, (2,0,1))
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self.datablock = junk['real'] + junk['imag']*1j
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self.datablockIndex = 0
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self.flagIsNewFile = 0
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self.idProfile = 0
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self.flagIsNewBlock = 1
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self.nReadBlocks += 1
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self.nBlocks += 1
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return 1
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def getData(self):
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"""
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getData obtiene una unidad de datos del buffer de lectura y la copia a la clase "Voltage"
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con todos los parametros asociados a este (metadata). cuando no hay datos en el buffer de
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lectura es necesario hacer una nueva lectura de los bloques de datos usando "readNextBlock"
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Ademas incrementa el contador del buffer en 1.
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Return:
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data : retorna un perfil de voltages (alturas * canales) copiados desde el
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buffer. Si no hay mas archivos a leer retorna None.
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Variables afectadas:
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self.m_DataObj
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self.datablockIndex
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self.idProfile
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Affected:
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self.m_DataObj
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self.datablockIndex
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self.flagResetProcessing
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self.flagIsNewBlock
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self.idProfile
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"""
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if self.flagNoMoreFiles: return 0
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self.flagResetProcessing = 0
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self.flagIsNewBlock = 0
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if self.__hasNotDataInBuffer():
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if not( self.readNextBlock() ):
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self.setNextFile()
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return 0
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self.m_DataObj.m_BasicHeader = self.m_BasicHeader.copy()
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self.m_DataObj.m_ProcessingHeader = self.m_ProcessingHeader.copy()
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self.m_DataObj.m_RadarControllerHeader = self.m_RadarControllerHeader.copy()
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self.m_DataObj.m_SystemHeader = self.m_SystemHeader.copy()
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self.m_DataObj.heights = self.heights
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self.m_DataObj.dataType = self.dataType
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if self.flagNoMoreFiles == 1:
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print 'Process finished'
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return 0
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#data es un numpy array de 3 dmensiones (perfiles, alturas y canales)
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if self.datablock == None:
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self.m_DataObj.flagNoData = True
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return 0
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time = self.m_BasicHeader.utc + self.datablockIndex * self.ippSeconds
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self.utc = time
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#self.m_DataObj.m_BasicHeader.utc = time
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self.m_DataObj.flagNoData = False
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self.m_DataObj.flagResetProcessing = self.flagResetProcessing
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self.m_DataObj.data = self.datablock[:,self.datablockIndex,:]
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self.m_DataObj.idProfile = self.idProfile
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self.datablockIndex += 1
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self.idProfile += 1
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#call setData - to Data Object
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return 1 #self.m_DataObj.data
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class VoltageWriter( JRODataWriter ):
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"""
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Esta clase permite escribir datos de voltajes a archivos procesados (.r). La escritura
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de los datos siempre se realiza por bloques.
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"""
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__configHeaderFile = 'wrSetHeadet.txt'
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m_DataObj = None
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ext = ".r"
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optchar = "D"
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datablock = None
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datablockIndex = 0
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shapeBuffer = None
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def __init__(self, m_Voltage=None):
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"""
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Inicializador de la clase VoltageWriter para la escritura de datos de espectros.
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Affected:
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self.m_DataObj
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Return: None
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"""
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if m_Voltage == None:
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m_Voltage = Voltage()
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if not( isinstance(m_Voltage, Voltage) ):
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raise ValueError, "in VoltageReader, m_Spectra must be an Spectra class object"
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self.m_DataObj = m_Voltage
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def hasAllDataInBuffer(self):
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if self.datablockIndex >= self.m_ProcessingHeader.profilesPerBlock:
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return 1
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return 0
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def setBlockDimension(self):
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"""
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Obtiene las formas dimensionales del los subbloques de datos que componen un bloque
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Affected:
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self.shape_spc_Buffer
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self.shape_cspc_Buffer
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self.shape_dc_Buffer
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Return: None
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"""
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self.shapeBuffer = (self.m_ProcessingHeader.profilesPerBlock,
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self.m_ProcessingHeader.numHeights,
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self.m_SystemHeader.numChannels )
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self.datablock = numpy.zeros(self.m_SystemHeader.numChannels,
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self.m_ProcessingHeader.profilesPerBlock,
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self.m_ProcessingHeader.numHeights,
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numpy.dtype('complex'))
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def writeBlock(self):
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"""
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Escribe el buffer en el file designado
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Affected:
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self.datablockIndex
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self.flagIsNewFile
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self.flagIsNewBlock
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self.nWriteBlocks
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self.blocksCounter
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Return: None
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"""
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data = numpy.zeros( self.shapeBuffer, self.dataType )
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junk = numpy.transpose(self.datablock, (1,2,0))
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data['real'] = junk.real
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data['imag'] = junk.imag
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data = data.reshape( (-1) )
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data.tofile( self.fp )
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self.datablock.fill(0)
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self.datablockIndex = 0
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self.flagIsNewFile = 0
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self.flagIsNewBlock = 1
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self.nWriteBlocks += 1
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self.blocksCounter += 1
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def putData(self):
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"""
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Setea un bloque de datos y luego los escribe en un file
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Affected:
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self.flagIsNewBlock
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self.datablockIndex
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Return:
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0 : Si no hay data o no hay mas files que puedan escribirse
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1 : Si se escribio la data de un bloque en un file
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"""
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self.flagIsNewBlock = 0
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if self.m_DataObj.flagNoData:
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return 0
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if self.m_DataObj.flagResetProcessing:
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self.datablock.fill(0)
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self.datablockIndex = 0
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self.setNextFile()
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self.datablock[:,self.datablockIndex,:] = self.m_DataObj.data
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self.datablockIndex += 1
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if self.hasAllDataInBuffer():
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#if self.flagIsNewFile:
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self.getHeader()
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self.writeNextBlock()
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if self.flagNoMoreFiles:
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#print 'Process finished'
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return 0
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return 1
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