I am trying to control the frequency sampling rate of my dial_tone python code through a Flask webserver. The audio output still works but when I drag the slider it doesnt affect the audio!
Here is my webserver script:
Here is my webserver script:
from flask import Flask
from flask import request
from dial_tone_modified import dial_tone_modified
app = Flask(__name__)
tb = dial_tone_modified()
@app.route("/set_samp_rate")
def set_samp_rate():
samp_rate = request.args.get("samp_rate")
print "Received " + str(samp_rate)
@app.route("/")
def web_interface():
html = open("web_interface.html")
response = html.read().replace('\n', '')
html.close()
return response
tb.start()
def main():
return "Welcome to my Flask Page!"
if __name__ == "__main__":
app.run(debug=True, host="0.0.0.0", port=8000)And this is my dial_tone code:#!/usr/bin/env python2
# -*- coding: utf-8 -*-
##################################################
# GNU Radio Python Flow Graph
# Title: Dial Tone Modified
# Generated: Mon Jul 15 11:15:28 2019
##################################################
from gnuradio import analog
from gnuradio import audio
from gnuradio import blocks
from gnuradio import eng_notation
from gnuradio import gr
from gnuradio.eng_option import eng_option
from gnuradio.filter import firdes
from optparse import OptionParser
class dial_tone_modified(gr.top_block):
def __init__(self):
gr.top_block.__init__(self, "Dial Tone Modified")
##################################################
# Variables
##################################################
self.samp_rate_0 = samp_rate_0 = 32000
self.samp_rate = samp_rate = 32000
##################################################
# Blocks
##################################################
self.blocks_add_xx = blocks.add_vff(1)
self.audio_sink = audio.sink(32000, '', True)
self.analog_sig_source_x_1 = analog.sig_source_f(samp_rate, analog.GR_COS_WAVE, 440, .4, 0)
self.analog_sig_source_x_0 = analog.sig_source_f(samp_rate, analog.GR_COS_WAVE, 350, .4, 0)
self.analog_noise_source_x_0 = analog.noise_source_f(analog.GR_GAUSSIAN, 0.005, -42)
##################################################
# Connections
##################################################
self.connect((self.analog_noise_source_x_0, 0), (self.blocks_add_xx, 2))
self.connect((self.analog_sig_source_x_0, 0), (self.blocks_add_xx, 0))
self.connect((self.analog_sig_source_x_1, 0), (self.blocks_add_xx, 1))
self.connect((self.blocks_add_xx, 0), (self.audio_sink, 0))
def get_samp_rate_0(self, a=32000):
self.samp_rate_0=a
return
def set_samp_rate_0(self, samp_rate_0):
self.samp_rate_0 = samp_rate_0
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
self.analog_sig_source_x_1.set_sampling_freq(self.samp_rate)
self.analog_sig_source_x_0.set_sampling_freq(self.samp_rate)
def main(top_block_cls=dial_tone_modified, options=None):
tb = dial_tone_modified()
tb.start()
try:
raw_input('Press Enter to quit: ')
except EOFError:
pass
tb.stop()
tb.wait()
if __name__ == '__main__':
main()And this is my html code:<!DOCTYPE html>
<html>
<body>
<h1>Web Browser Control</h1>
<p>Drag the slider to display the current value.</p>
<div id="slidecontainer">
<input type="range" min="0" max="32e3" value="0" id="range1">
<p>Value: <span id="range1_value"></span></p>
</div>
<script>
var slider = document.getElementById("range1");
var output = document.getElementById("range1_value");
output.innerHTML = slider.value;
slider.oninput = function() {
output.innerHTML = slider.value;
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
}
};
xhttp.open("GET", "http://127.0.0.1:5000/set_samp_rate_0?samp_rate_0=" + slider.value, true);
xhttp.send();
}
</script>
</body>
</html>Can any one help me how to solve this problem, please!