kopia lustrzana https://github.com/F5OEO/PiFmRds
56 wiersze
1.3 KiB
Python
Executable File
56 wiersze
1.3 KiB
Python
Executable File
#!/usr/bin/python
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# This program uses Pydemod, see https://github.com/ChristopheJacquet/Pydemod
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import pydemod.app.rds as rds
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import pydemod.modulation.am as am
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import numpy
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import scipy.io.wavfile as wavfile
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import io
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sample_rate = 228000
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outc = io.open("waveforms.c", mode="w", encoding="utf8")
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outh = io.open("waveforms.h", mode="w", encoding="utf8")
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header = u"""
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/* This file was automatically generated by "generate_waveforms.py".
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(C) 2014 Christophe Jacquet.
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Released under the GNU GPL v3 license.
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*/
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"""
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outc.write(header)
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outh.write(header)
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def format_number(x):
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if abs(x) < 1e-10:
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return u"0"
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else:
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return unicode(x)
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def generate_bit_in_context(pattern, name):
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offset = 240
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l = 96
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count = 2
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shapedSamples = rds.unmodulated_signal(pattern, sample_rate)
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out = shapedSamples[offset:offset+l*count]
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iout = (out * 20000./max(abs(out)) ).astype(numpy.dtype('>i2'))
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wavfile.write(u"waveform_{}.wav".format(name), sample_rate, iout)
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outc.write(u"float waveform_{name}[] = {{{values}}};\n\n".format(
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name = name,
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values = u", ".join(map(format_number, out))))
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outh.write(u"extern float waveform_{name}[];\n".format(name=name))
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generate_bit_in_context([0, 0, 0], "identical")
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generate_bit_in_context([0, 1, 0], "different")
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outc.close()
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outh.close() |