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from abc import ABCMeta, abstractmethod
import os
from importlib import import_module
#def datasetFactory(datasetName, *args, **kwargs):
def datasetFactory(datasetName, videodataDIR, BVPdataDIR):
try:
moduleName = datasetName.lower()
className = datasetName.upper()
datasetModule = import_module('pyVHR.datasets.' + moduleName) #, package='pyVHR')
classOBJ = getattr(datasetModule, className)
#obj = classOBJ(*args, **kwargs)
obj = classOBJ(videodataDIR, BVPdataDIR)
except (AttributeError, ModuleNotFoundError):
raise ImportError('{} is not part of pyVHR dataset collection!'.format(datasetName))
return obj
class Dataset(metaclass=ABCMeta):
"""
Manage datasets (parent class for new datasets)
"""
def __init__(self, videodataDIR=None, BVPdataDIR=None):
# -- load filenames
self.videoFilenames = [] # list of all video filenames
self.sigFilenames = [] # list of all Sig filenames
self.numVideos = 0 # num of videos in the dataset
self.videodataDIR = videodataDIR
self.BVPdataDIR = BVPdataDIR
self.loadFilenames()
def loadFilenames(self):
"""Load dataset file names: define vars videoFilenames and BVPFilenames"""
# -- loop on the dir struct of the dataset getting filenames
for root, dirs, files in os.walk(self.videodataDIR):
for f in files:
filename = os.path.join(root, f)
path, name = os.path.split(filename)
# -- select video
if filename.endswith(self.video_EXT) and (name.find(self.VIDEO_SUBSTRING)>=0):
self.videoFilenames.append(filename)
# -- select signal
if filename.endswith(self.SIG_EXT) and (name.find(self.SIG_SUBSTRING)>=0):
self.sigFilenames.append(filename)
# -- number of videos
self.numVideos = len(self.videoFilenames)
def getVideoFilename(self, videoIdx=0):
"""Get video filename given the progressive index"""
return self.videoFilenames[videoIdx]
def getSigFilename(self, videoIdx=0):
"""Get Signal filename given the progressive index"""
return self.sigFilenames[videoIdx]
@abstractmethod
def readSigfile(self, filename):
""" Load signal from file.
Return a BVPsignal/ECGsignal object.
"""
pass
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