Chris@56: '''A high-level interface to the vampyhost extension module, for quickly and easily running Vamp audio analysis plugins on audio files and buffers.'''
Chris@56: 
Chris@56: import numpy
Chris@56: 
Chris@84: def frames_from_array(arr, step_size, frameSize):
Chris@84:     """Generate a list of frames of size frameSize, extracted from the input array arr at step_size intervals"""
Chris@56:     # presumably such a function exists in many places, but I need practice
Chris@84:     assert(step_size > 0)
Chris@56:     if arr.ndim == 1: # turn 1d into 2d array with 1 channel
Chris@56:         arr = numpy.reshape(arr, (1, arr.shape[0]))
Chris@56:     assert(arr.ndim == 2)
Chris@56:     n = arr.shape[1]
Chris@56:     i = 0
Chris@56:     while (i < n):
Chris@56:         frame = arr[:, i : i + frameSize]
Chris@56:         w = frame.shape[1]
Chris@56:         if (w < frameSize):
Chris@56:             pad = numpy.zeros((frame.shape[0], frameSize - w))
Chris@56:             frame = numpy.concatenate((frame, pad), 1)
Chris@56:         yield frame
Chris@84:         i = i + step_size
Chris@56: