source: python/aubio/task/task.py @ 6610143

from aubio.aubioclass import * 
from params import taskparams

class task(taskparams):
        """ default template class to apply tasks on a stream """
        def __init__(self,input,output=None,params=None):
                """ open the input file and initialize default argument 
                parameters should be set *before* calling this method.
                """
                import time
                self.tic = time.time()
                if params == None: self.params = taskparams()
                else: self.params = params
                self.frameread = 0
                self.readsize  = self.params.hopsize
                self.input     = input
                self.filei     = sndfile(self.input)
                self.srate     = self.filei.samplerate()
                self.channels  = self.filei.channels()
                self.params.step = float(self.params.hopsize)/float(self.srate)
                self.myvec     = fvec(self.params.hopsize,self.channels)
                self.output    = output

        def __call__(self):
                self.readsize = self.filei.read(self.params.hopsize,self.myvec)
                self.frameread += 1
                
        def compute_all(self):
                """ Compute data """
                mylist    = []
                while(self.readsize==self.params.hopsize):
                        tmp = self()
                        if tmp: 
                                mylist.append(tmp)
                                if self.params.verbose:
                                        self.fprint(tmp)
                return mylist
        
        def fprint(self,foo):
                print foo

        def eval(self,results):
                """ Eval data """
                pass

        def plot(self):
                """ Plot data """
                pass

        def time(self):
                import time
                #print "CPU time is now %f seconds," % time.clock(),
                #print "task execution took %f seconds" % (time.time() - self.tic)
                return time.time() - self.tic