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# -*- coding: utf-8 -*-
#
# Modulation Error Rate
#
# http://www.opendigitalradio.org
# Licence: The MIT License, see notice at the end of this file
import datetime
import os
import logging
import time
try:
logging_path = os.path.dirname(logging.getLoggerClass().root.handlers[0].baseFilename)
except:
logging_path = "/tmp/"
import src.const
import src.Dab_Util
import numpy as np
import matplotlib
matplotlib.use('agg')
import matplotlib.pyplot as plt
class Test_data:
def __init__(self, sample_rate, type):
"""
Standardized access to complex64 test data files.
:param sample_rate:
:param type:
Testing:
TD = src.Test_data.Test_data(8192000, 'file')
tx_orig = TD.get_symbol(0,0)
fig = plt.figure(figsize=(9,6))
ax = fig.add_subplot(2,1,1)
ax.plot(tx_orig)
ax = fig.add_subplot(2,1,2)
plt.plot(np.angle(np.fft.fftshift(np.fft.fft(tx_orig))), 'p')
"""
self.c = src.const.const(sample_rate)
self.du = src.Dab_Util.Dab_Util(sample_rate)
self.file_paths = {
(2048000, 'file'):
("./test_data/odr-dabmod_to_file_2048_NoFir_noDPD.iq",
(
self.c.T_F + # Pipelineing
self.c.T_NULL + # NULL Symbol
self.c.T_S + # Synchronization Symbol
self.c.T_C # Cyclic Prefix
)),
(8192000, 'file'):
("./test_data/odr-dabmod_to_file_8192_NoFir_noDPD.iq",
(
self.c.T_F + # Pipelining
self.c.T_U + # Pipelining Resampler TODO(?)
self.c.T_NULL + # NULL Symbol
self.c.T_S + # Synchronization Symbol
self.c.T_C # Cyclic Prefix
)),
(8192000, 'rec_noFir'):
("./test_data/odr-dabmod_reconding_8192_NoFir_DPD_2104.iq",
( 64 )),
(8192000, 'rec_fir'):
("./test_data/odr-dabmod_reconding_8192_Fir_DPD_2104.iq",
( 232 )),
}
config = (sample_rate, type)
if not config in self.file_paths.keys():
raise RuntimeError("Configuration not found, possible are:\n {}".
format(self.file_paths))
self.path, self.file_offset = self.file_paths[(sample_rate, type)]
def _load_from_file(self, offset, length):
print(offset, length, self.file_offset)
return self.du.fromfile(
self.path,
length=length,
offset=offset + self.file_offset)
def get_symbol_without_prefix(self,
frame_idx=0,
symbol_idx=0,
off=0):
return self._load_from_file(
frame_idx*self.c.T_F +
symbol_idx*self.c.T_S +
off,
self.c.T_U)
def get_symbol_with_prefix(self,
frame_idx=0,
symbol_idx=0,
n_symbols=1,
off=0):
offset = (
frame_idx*self.c.T_F +
symbol_idx*self.c.T_S -
self.c.T_C +
off)
return self._load_from_file( offset, self.c.T_S * n_symbols)
def get_file_length_in_symbols(self):
symbol_size = float(
64/8 * # complex 64
self.c.T_S # Symbol Size
)
return os.path.getsize(self.path) / symbol_size
# The MIT License (MIT)
#
# Copyright (c) 2017 Andreas Steger
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
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