"""
Embedded Python Blocks:

Each time this file is saved, GRC will instantiate the first class it finds
to get ports and parameters of your block. The arguments to __init__  will
be the parameters. All of them are required to have default values!
"""

import numpy as np
from gnuradio import gr

import time


class blk(gr.sync_block):  # other base classes are basic_block, decim_block, interp_block
    """Embedded Python Block - debug sample rate"""

    def __init__(self, time_slot=5):  # only default arguments here
        """arguments to this function show up as parameters in GRC"""
        gr.sync_block.__init__(
            self,
            name='Debug Sample Rate',   # will show up in GRC
            in_sig=[np.complex64],
            out_sig=[np.complex64]
        )
        self.time_slot = time_slot
        self.time_start=self.time_last=time.time()
        self.sum_items=0
        

    def work(self, input_items, output_items):
        output_items[0][:] = input_items[0]
        self.sum_items += len(input_items[0])
        if time.time()-self.time_last > self.time_slot:
			self.time_last=time.time()
			print u"SampRate:{:11,.0f} B/s,  Elapsed:{:3,.0f} sec".format( float(self.sum_items)/(time.time()-self.time_start), time.time()-self.time_start )
        return len(output_items[0])