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https://github.com/jopohl/urh.git
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12389953c6
* add cython method for abs2 * add arr2decibel method * add timings * add fft benchmark * add live spectrogram test * add test for spectrum analyzer * tune thread count * add spectrogram to spectrum dialog * integrate waterfall * fix unittest * improve grid scene * draw frequency marker in spectrum analyzer * clear spectrogram on clear button + remove marker on leave * eliminate spectrogram graphic view on close * ensure spectrogram fits in view * guard resize * add test for clear button in spectrum dialog
76 lines
2.5 KiB
Python
76 lines
2.5 KiB
Python
import time
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from multiprocessing import Process, Pipe
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from multiprocessing.connection import Connection
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import numpy as np
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from PyQt5.QtGui import QPixmap
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from PyQt5.QtWidgets import QApplication, QFrame, QVBoxLayout, QGraphicsView, QPushButton, QGraphicsScene, QLabel
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from urh.signalprocessing.Spectrogram import Spectrogram
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def generate_data(connection: Connection, num_samples=32768):
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frequency = 0.1
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divisor = 200
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pos = 0
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while True:
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result = np.zeros(num_samples, dtype=np.complex64)
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result.real = np.cos(2 * np.pi * frequency * np.arange(pos, pos + num_samples))
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result.imag = np.sin(2 * np.pi * frequency * np.arange(pos, pos + num_samples))
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pos += num_samples
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if pos / num_samples >= divisor:
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frequency *= 2
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if frequency >= 1:
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frequency = 0.1
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pos = 0
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connection.send(result)
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def go():
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global graphic_view, status_label
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data_parent, data_child = Pipe(duplex=False)
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receiver = Process(target=generate_data, args=(data_child,))
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receiver.daemon = True
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receiver.start()
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scene = QGraphicsScene()
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graphic_view.setScene(scene)
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scene.setSceneRect(0, 0, 1024, 1024)
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x_pos = 0
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y_pos = 0
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t = time.time()
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while True:
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speed = time.time()
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data = data_parent.recv()
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spectrogram = Spectrogram(data)
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pixmap = QPixmap.fromImage(spectrogram.create_spectrogram_image(transpose=True))
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scene.setSceneRect(scene.sceneRect().adjusted(0, 0, 0, pixmap.height()))
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item = scene.addPixmap(pixmap)
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item.setPos(x_pos, y_pos)
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y_pos += pixmap.height()
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graphic_view.fitInView(scene.sceneRect())
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status_label.setText("Height: {0:.0f} // Speed: {1:.2f} // Total Time: {2:.2f}".format(scene.sceneRect().height(),
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1/(time.time()-speed),
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time.time()-t))
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QApplication.instance().processEvents()
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if __name__ == '__main__':
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global graphic_view, status_label
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app = QApplication(["spectrum"])
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widget = QFrame()
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layout = QVBoxLayout()
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graphic_view = QGraphicsView()
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layout.addWidget(graphic_view)
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status_label = QLabel()
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layout.addWidget(status_label)
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btn = QPushButton("Go")
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layout.addWidget(btn)
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btn.clicked.connect(go)
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widget.setLayout(layout)
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widget.showMaximized()
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app.exec_()
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