1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
# given the cmdline arg, turns the byte sequencies into a list of frequencies, and vice versa
# 1875 1924 +24, -25, range/2, 1, flipping new info 2 sending or not
import numpy as np
import pyaudio
import threading
def calculate_send_frequencies(start_freq, freq_range, bytes_per_transmit):
bits_to_send = 8 * bytes_per_transmit + 2 # 8 bits per byte, 2 bits for flags
freq_interval = freq_range / (bits_to_send + 1) # +1 to not include endpoints of range
freq_list = []
for i in range(bits_to_send):
f = int(start_freq + (i + 1) * freq_interval)
freq_list.append(f)
print(freq_list)
return freq_list
def frequencies_to_bytes(frequencies, expected_freqs):
# get the interval between frequencies, so we can clamp the range around them
freq_interval = expected_freqs[1] - expected_freqs[0]
plus_minus = freq_interval // 2
byte_list = [0] * len(frequencies)
for freq in frequencies:
for i in range(len(frequencies)):
# clamp the range around the frequency to the frequency
if expected_freqs[i] - plus_minus <= freq < expected_freqs[i] + plus_minus:
byte_list[i] = 1
return byte_list
def play_frequency(freq, p, duration=1.0, samplingRate=44100):
amplitude = .1 # Maximum amplitude
print(freq)
samples = (amplitude * np.sin(2 * np.pi * np.arange(samplingRate * duration) * freq / samplingRate)).astype(
np.float32).tobytes()
stream = p.open(format=pyaudio.paFloat32, channels=1, rate=samplingRate, output=True)
stream.write(samples)
# thread for listening here
stream.stop_stream()
stream.close()
# def play_data(data, start_freq, freq_step, byte_per_transmit):
# p = pyaudio.PyAudio()
# freq_list = make_frequencies_map(start_freq, freq_step, byte_per_transmit)
# print(freq_list, data)
# def play_thread(freq):
# play_frequency(freq, p=p)
# threads = []
# for item in data:
# for i, bit in enumerate(item):
# if bit == '1':
# thread = threading.Thread(target=play_thread, args=(freq_list[i],))
# threads.append(thread)
# thread.start()
# for thread in threads:
# thread.join()
# p.terminate()
def play_data(data, start_freq, freq_step, bytes_per_transmit, p):
freq_list = calculate_send_frequencies(start_freq, freq_step, bytes_per_transmit)
threads = []
for item in data:
for i, bit in enumerate(item):
if bit == '1':
thread = threading.Thread(target=play_frequency, args=(freq_list[i], p, 10.0))
threads.append(thread)
thread.start()
for thread in threads:
thread.join()
# def listen_for_confirmation(stream):
# # Logic to listen and decode the confirmation data
# # This function should run in its own thread
# recieved_data = stream.read(1024)
|
