Browse Source

Initial commit with all clutter

LongHairedHacker 5 months ago
commit
f606aac0d7

BIN
demod.dat


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demod.py

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+#!/usr/bin/env python3
+
+import scipy.io.wavfile
+from matplotlib import pyplot as plt
+import numpy as np
+from scipy.signal import decimate, hilbert
+
+MIX_FREQ = 1200.0
+
+def render_waterfall(rate, chuck_period, samples):
+    period = 1/rate
+    print("Period is %s" % (period, ))
+
+    chunk_size = int(chuck_period / period)
+    chunk_count = int(len(samples) / chunk_size)
+
+    print("Chunk size: %d samples" % chunk_size)
+    print("Chunk count: %d" % chunk_count)
+
+    ffts = []
+    for i in range(0, chunk_count):
+        fft = np.fft.rfft(samples[i * chunk_size: (i+1) * chunk_size])
+        fft = np.abs(fft)
+        fft /= len(fft)
+        fft = 20 * np.log10(fft)
+        ffts +=[fft]
+
+    freqs = np.fft.rfftfreq(chunk_size, period)
+
+    plt.viridis()
+    fig = plt.figure()
+    ax = fig.add_subplot(111)
+    cax = ax.matshow(ffts, aspect='auto', extent=(freqs[0], freqs[-1], chunk_count, 0))
+    fig.colorbar(cax)
+
+    plt.show()
+
+
+
+def main():
+    rate, data = scipy.io.wavfile.read("satnogs_29407_2019-01-31T17-11-29_short.wav")
+
+    render_waterfall(rate, 10 * 10**-3, data)
+
+    phase_acc = np.arange(0, len(data))
+    mix_sig = np.cos(phase_acc * 2 * np.pi * MIX_FREQ/rate)
+    data = data * mix_sig
+
+    data = decimate(data, 20)
+    data = data - np.average(data)
+    data = data / np.max(np.abs(data))
+
+    render_waterfall(rate/20, 100 * 10**-3, data)
+
+    cmplx = hilbert(data)
+
+    phase = np.angle(cmplx) / np.pi
+
+    dphase = phase[:-1] - phase[1:]
+
+    plt.plot(dphase)
+    plt.show()
+
+
+if __name__ == '__main__':
+    main()

BIN
demod.wav


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deriv.py

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+#!/usr/bin/env python3
+
+import scipy.io.wavfile
+from matplotlib import pyplot as plt
+import numpy as np
+
+def main():
+    rate, data = scipy.io.wavfile.read("demod.wav")
+
+    data = data - np.average(data)
+    data = data / np.max(np.abs(data))
+
+    deriv = np.abs(data[1:] - data[0:-1])
+
+    plt.plot(deriv)
+    plt.show()
+
+
+
+
+
+if __name__ == '__main__':
+    main()

BIN
output.png


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render.py

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+#!/usr/bin/env python3
+
+import matplotlib.pyplot as plt
+import struct
+
+from PIL import Image
+
+IMG_WIDTH = 640
+
+SYNC_LENGTH = 105
+SYNC_THRESH = 100
+PORCH_LENGTH = 10
+
+LINE_LENGTH = SYNC_LENGTH + PORCH_LENGTH + 4 * IMG_WIDTH
+
+MAX_DEV = 600
+CENTER = 1750
+MIN_FREQ = 1200
+MAX_FREQ = 2300
+
+COLOR_LOW = 1500
+COLOR_HIGH = MAX_FREQ
+
+def to_freq(sample):
+    freq = CENTER + sample * MAX_DEV
+    freq = max(MIN_FREQ, freq)
+    freq = min(MAX_FREQ, freq)
+    return freq
+
+def to_color(sample):
+    sample = (sample - 1500) / (COLOR_HIGH - COLOR_LOW)
+    sample = int(sample * 255)
+    sample = max(sample, 0)
+    sample = min(sample, 255)
+    return sample
+
+def ycbcr_to_rgb(y, cb, cr):
+    r = int(y + 1.402 * (cr - 128))
+    g = int(y - 3.44136 * (cb - 128) - 0.714136 * (cr - 128))
+    b = int(y + 1.772 * (cb - 128))
+    return (r,g,b)
+
+last_sync = False
+def is_sync(backlog):
+    global last_sync
+    count = 0
+    for sample in backlog:
+        if sample < COLOR_LOW:
+            count += 1
+
+    res = False
+    if count > SYNC_THRESH and not last_sync:
+        res = True
+
+    last_sync = count > SYNC_THRESH
+    return res
+
+
+def render_lines(line):
+    pixels = [[(0,0,0)] * IMG_WIDTH,  [(0,0,0)] * IMG_WIDTH]
+
+    # Strip porch
+    porch = len(line) - SYNC_LENGTH - 4 * IMG_WIDTH
+    if porch < 0:
+        return pixels
+    line = line[PORCH_LENGTH:]
+
+    for i in range(0, IMG_WIDTH):
+        y0 = to_color(line[i])
+        cr = to_color(line[IMG_WIDTH + i])
+        cb = to_color(line[2 * IMG_WIDTH + i])
+        y1 = to_color(line[3 * IMG_WIDTH + i])
+
+        pixels[0][i] = y0, cb, cr
+        pixels[1][i] = y1, cb, cr
+
+    return pixels
+
+def main():
+    data_file = open("demod.dat", 'rb')
+
+    samples = []
+    syncs = []
+
+    pixels = []
+
+    backlog = [0.0] * SYNC_LENGTH
+    line = []
+
+    bytes = data_file.read(4)
+    while len(bytes) == 4:
+        sample = struct.unpack('f', bytes)[0]
+        sample = to_freq(sample)
+        samples += [sample]
+
+        backlog = backlog[1:] + [sample]
+
+        line += [sample]
+
+        if is_sync(backlog) or len(line) > LINE_LENGTH:
+            if len(line) > SYNC_LENGTH + 4 * IMG_WIDTH:
+                syncs += [1000]
+                print("%d \t %d" % (len(line), len(line) - LINE_LENGTH))
+                pixels += render_lines(line)
+            else:
+                print("Short line dropped")
+            line = []
+        else:
+            syncs += [0]
+
+        bytes = data_file.read(4)
+
+
+    plt.plot(samples)
+    plt.plot(syncs)
+    plt.show()
+
+    img = Image.new('YCbCr', (IMG_WIDTH, len(pixels)))
+    img_pix = img.load()
+    for x in range(0, IMG_WIDTH):
+        for y in range(0, len(pixels)):
+            img_pix[x,y] = pixels[y][x]
+
+    img = img.convert('RGB')
+
+    img.save('output.png')
+
+
+if __name__ == '__main__':
+    main()

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satnogs_29407_2019-01-31T17-11-29.ogg


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satnogs_29407_2019-01-31T17-11-29.wav


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satnogs_29407_2019-01-31T17-11-29_short.wav


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satnogs_29412_2019-02-01T16-20-03_short.wav


+ 2 - 0
setup_env.sh

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+export PYTHONPATH=/usr/local/lib/python2.7/site-packages/
+export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/local/lib/python2.7/site-packages/satnogs:/usr/local/lib/"

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sstv_decode.grc


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sstv_decode2.grc


+ 260 - 0
top_block.py

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+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+##################################################
+# GNU Radio Python Flow Graph
+# Title: Top Block
+# Generated: Sat Feb 16 20:51:50 2019
+##################################################
+
+if __name__ == '__main__':
+    import ctypes
+    import sys
+    if sys.platform.startswith('linux'):
+        try:
+            x11 = ctypes.cdll.LoadLibrary('libX11.so')
+            x11.XInitThreads()
+        except:
+            print "Warning: failed to XInitThreads()"
+
+from PyQt4 import Qt
+from gnuradio import analog
+from gnuradio import blocks
+from gnuradio import eng_notation
+from gnuradio import filter
+from gnuradio import gr
+from gnuradio import qtgui
+from gnuradio.eng_option import eng_option
+from gnuradio.filter import firdes
+from optparse import OptionParser
+import sip
+import sys
+from gnuradio import qtgui
+
+
+class top_block(gr.top_block, Qt.QWidget):
+
+    def __init__(self):
+        gr.top_block.__init__(self, "Top Block")
+        Qt.QWidget.__init__(self)
+        self.setWindowTitle("Top Block")
+        qtgui.util.check_set_qss()
+        try:
+            self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
+        except:
+            pass
+        self.top_scroll_layout = Qt.QVBoxLayout()
+        self.setLayout(self.top_scroll_layout)
+        self.top_scroll = Qt.QScrollArea()
+        self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
+        self.top_scroll_layout.addWidget(self.top_scroll)
+        self.top_scroll.setWidgetResizable(True)
+        self.top_widget = Qt.QWidget()
+        self.top_scroll.setWidget(self.top_widget)
+        self.top_layout = Qt.QVBoxLayout(self.top_widget)
+        self.top_grid_layout = Qt.QGridLayout()
+        self.top_layout.addLayout(self.top_grid_layout)
+
+        self.settings = Qt.QSettings("GNU Radio", "top_block")
+        self.restoreGeometry(self.settings.value("geometry").toByteArray())
+
+
+        ##################################################
+        # Variables
+        ##################################################
+        self.samp_rate = samp_rate = 48000
+
+        ##################################################
+        # Blocks
+        ##################################################
+        self.rational_resampler_xxx_0 = filter.rational_resampler_fff(
+                interpolation=5263,
+                decimation=12000,
+                taps=None,
+                fractional_bw=None,
+        )
+        self.qtgui_waterfall_sink_x_0_0 = qtgui.waterfall_sink_f(
+        	4096, #size
+        	firdes.WIN_BLACKMAN_hARRIS, #wintype
+        	0, #fc
+        	5263, #bw
+        	"", #name
+                1 #number of inputs
+        )
+        self.qtgui_waterfall_sink_x_0_0.set_update_time(0.10)
+        self.qtgui_waterfall_sink_x_0_0.enable_grid(False)
+        self.qtgui_waterfall_sink_x_0_0.enable_axis_labels(True)
+
+        if not True:
+          self.qtgui_waterfall_sink_x_0_0.disable_legend()
+
+        if "float" == "float" or "float" == "msg_float":
+          self.qtgui_waterfall_sink_x_0_0.set_plot_pos_half(not True)
+
+        labels = ['', '', '', '', '',
+                  '', '', '', '', '']
+        colors = [0, 0, 0, 0, 0,
+                  0, 0, 0, 0, 0]
+        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
+                  1.0, 1.0, 1.0, 1.0, 1.0]
+        for i in xrange(1):
+            if len(labels[i]) == 0:
+                self.qtgui_waterfall_sink_x_0_0.set_line_label(i, "Data {0}".format(i))
+            else:
+                self.qtgui_waterfall_sink_x_0_0.set_line_label(i, labels[i])
+            self.qtgui_waterfall_sink_x_0_0.set_color_map(i, colors[i])
+            self.qtgui_waterfall_sink_x_0_0.set_line_alpha(i, alphas[i])
+
+        self.qtgui_waterfall_sink_x_0_0.set_intensity_range(-140, 10)
+
+        self._qtgui_waterfall_sink_x_0_0_win = sip.wrapinstance(self.qtgui_waterfall_sink_x_0_0.pyqwidget(), Qt.QWidget)
+        self.top_grid_layout.addWidget(self._qtgui_waterfall_sink_x_0_0_win)
+        self.qtgui_waterfall_sink_x_0 = qtgui.waterfall_sink_c(
+        	4096, #size
+        	firdes.WIN_BLACKMAN_hARRIS, #wintype
+        	0, #fc
+        	samp_rate, #bw
+        	"", #name
+                1 #number of inputs
+        )
+        self.qtgui_waterfall_sink_x_0.set_update_time(0.10)
+        self.qtgui_waterfall_sink_x_0.enable_grid(False)
+        self.qtgui_waterfall_sink_x_0.enable_axis_labels(True)
+
+        if not True:
+          self.qtgui_waterfall_sink_x_0.disable_legend()
+
+        if "complex" == "float" or "complex" == "msg_float":
+          self.qtgui_waterfall_sink_x_0.set_plot_pos_half(not True)
+
+        labels = ['', '', '', '', '',
+                  '', '', '', '', '']
+        colors = [0, 0, 0, 0, 0,
+                  0, 0, 0, 0, 0]
+        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
+                  1.0, 1.0, 1.0, 1.0, 1.0]
+        for i in xrange(1):
+            if len(labels[i]) == 0:
+                self.qtgui_waterfall_sink_x_0.set_line_label(i, "Data {0}".format(i))
+            else:
+                self.qtgui_waterfall_sink_x_0.set_line_label(i, labels[i])
+            self.qtgui_waterfall_sink_x_0.set_color_map(i, colors[i])
+            self.qtgui_waterfall_sink_x_0.set_line_alpha(i, alphas[i])
+
+        self.qtgui_waterfall_sink_x_0.set_intensity_range(-140, 10)
+
+        self._qtgui_waterfall_sink_x_0_win = sip.wrapinstance(self.qtgui_waterfall_sink_x_0.pyqwidget(), Qt.QWidget)
+        self.top_grid_layout.addWidget(self._qtgui_waterfall_sink_x_0_win)
+        self.qtgui_time_sink_x_0 = qtgui.time_sink_f(
+        	1024, #size
+        	5263, #samp_rate
+        	"", #name
+        	1 #number of inputs
+        )
+        self.qtgui_time_sink_x_0.set_update_time(0.10)
+        self.qtgui_time_sink_x_0.set_y_axis(-3.2, 3.2)
+
+        self.qtgui_time_sink_x_0.set_y_label('Amplitude', "")
+
+        self.qtgui_time_sink_x_0.enable_tags(-1, True)
+        self.qtgui_time_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, 0, "")
+        self.qtgui_time_sink_x_0.enable_autoscale(False)
+        self.qtgui_time_sink_x_0.enable_grid(False)
+        self.qtgui_time_sink_x_0.enable_axis_labels(True)
+        self.qtgui_time_sink_x_0.enable_control_panel(False)
+        self.qtgui_time_sink_x_0.enable_stem_plot(False)
+
+        if not True:
+          self.qtgui_time_sink_x_0.disable_legend()
+
+        labels = ['', '', '', '', '',
+                  '', '', '', '', '']
+        widths = [1, 1, 1, 1, 1,
+                  1, 1, 1, 1, 1]
+        colors = ["blue", "red", "green", "black", "cyan",
+                  "magenta", "yellow", "dark red", "dark green", "blue"]
+        styles = [1, 1, 1, 1, 1,
+                  1, 1, 1, 1, 1]
+        markers = [-1, -1, -1, -1, -1,
+                   -1, -1, -1, -1, -1]
+        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
+                  1.0, 1.0, 1.0, 1.0, 1.0]
+
+        for i in xrange(1):
+            if len(labels[i]) == 0:
+                self.qtgui_time_sink_x_0.set_line_label(i, "Data {0}".format(i))
+            else:
+                self.qtgui_time_sink_x_0.set_line_label(i, labels[i])
+            self.qtgui_time_sink_x_0.set_line_width(i, widths[i])
+            self.qtgui_time_sink_x_0.set_line_color(i, colors[i])
+            self.qtgui_time_sink_x_0.set_line_style(i, styles[i])
+            self.qtgui_time_sink_x_0.set_line_marker(i, markers[i])
+            self.qtgui_time_sink_x_0.set_line_alpha(i, alphas[i])
+
+        self._qtgui_time_sink_x_0_win = sip.wrapinstance(self.qtgui_time_sink_x_0.pyqwidget(), Qt.QWidget)
+        self.top_grid_layout.addWidget(self._qtgui_time_sink_x_0_win)
+        self.low_pass_filter_0 = filter.fir_filter_fff(1, firdes.low_pass(
+        	1, 12000, 1000, 1000, firdes.WIN_HAMMING, 6.76))
+        self.hilbert_fc_0 = filter.hilbert_fc(65, firdes.WIN_HAMMING, 6.76)
+        self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_ccc(4, (127, ), 1750, samp_rate)
+        self.blocks_wavfile_source_0 = blocks.wavfile_source('/home/sebastian/projects/satnogs/sstv/satnogs_29412_2019-02-01T16-20-03_short.wav', False)
+        self.blocks_throttle_0 = blocks.throttle(gr.sizeof_float*1, samp_rate,True)
+        self.blocks_file_sink_0 = blocks.file_sink(gr.sizeof_float*1, 'demod.dat', False)
+        self.blocks_file_sink_0.set_unbuffered(False)
+        self.analog_nbfm_rx_0 = analog.nbfm_rx(
+        	audio_rate=samp_rate/4,
+        	quad_rate=samp_rate/4,
+        	tau=75e-6,
+        	max_dev=600,
+          )
+
+
+
+        ##################################################
+        # Connections
+        ##################################################
+        self.connect((self.analog_nbfm_rx_0, 0), (self.low_pass_filter_0, 0))
+        self.connect((self.blocks_throttle_0, 0), (self.hilbert_fc_0, 0))
+        self.connect((self.blocks_wavfile_source_0, 0), (self.blocks_throttle_0, 0))
+        self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.analog_nbfm_rx_0, 0))
+        self.connect((self.hilbert_fc_0, 0), (self.freq_xlating_fir_filter_xxx_0, 0))
+        self.connect((self.hilbert_fc_0, 0), (self.qtgui_waterfall_sink_x_0, 0))
+        self.connect((self.low_pass_filter_0, 0), (self.rational_resampler_xxx_0, 0))
+        self.connect((self.rational_resampler_xxx_0, 0), (self.blocks_file_sink_0, 0))
+        self.connect((self.rational_resampler_xxx_0, 0), (self.qtgui_time_sink_x_0, 0))
+        self.connect((self.rational_resampler_xxx_0, 0), (self.qtgui_waterfall_sink_x_0_0, 0))
+
+    def closeEvent(self, event):
+        self.settings = Qt.QSettings("GNU Radio", "top_block")
+        self.settings.setValue("geometry", self.saveGeometry())
+        event.accept()
+
+    def get_samp_rate(self):
+        return self.samp_rate
+
+    def set_samp_rate(self, samp_rate):
+        self.samp_rate = samp_rate
+        self.qtgui_waterfall_sink_x_0.set_frequency_range(0, self.samp_rate)
+        self.blocks_throttle_0.set_sample_rate(self.samp_rate)
+
+
+def main(top_block_cls=top_block, options=None):
+
+    from distutils.version import StrictVersion
+    if StrictVersion(Qt.qVersion()) >= StrictVersion("4.5.0"):
+        style = gr.prefs().get_string('qtgui', 'style', 'raster')
+        Qt.QApplication.setGraphicsSystem(style)
+    qapp = Qt.QApplication(sys.argv)
+
+    tb = top_block_cls()
+    tb.start()
+    tb.show()
+
+    def quitting():
+        tb.stop()
+        tb.wait()
+    qapp.connect(qapp, Qt.SIGNAL("aboutToQuit()"), quitting)
+    qapp.exec_()
+
+
+if __name__ == '__main__':
+    main()