joachim/openwebrx-clone
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Moved fft_averages calculation to openwebrx.py. Renamed fft_overlap to fft_voverlap_factor because it is not related to overlapped FFT. It is rather related to the vertical overlap of the amplitudes (calculated from FFT bins) on the display.

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This commit is contained in:
ha7ilm 2016-10-29 21:22:31 +02:00
parent 816f860de3
commit a31d4b9fe2
3 changed files with 8 additions and 12 deletions
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5
config_webrx.py
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@ -70,11 +70,8 @@ sdrhu_public_listing = False
dsp_plugin="csdr"
fft_fps=9
fft_size=4096
fft_overlap=0.3
fft_voverlap_factor=0.3
samp_rate = 250000
fft_averages=int(round(1.0 * samp_rate / fft_size / fft_fps / (1.0 - fft_overlap)))
center_freq = 145525000
rf_gain = 5 #in dB. For an RTL-SDR, rf_gain=0 will set the tuner to auto gain mode, else it will be in manual gain mode.
ppm = 0

2
openwebrx.py
View File

@ -287,7 +287,7 @@ def spectrum_thread_function():
dsp.set_samp_rate(cfg.samp_rate)
dsp.set_fft_size(cfg.fft_size)
dsp.set_fft_fps(cfg.fft_fps)
dsp.set_fft_averages(cfg.fft_averages)
dsp.set_fft_averages(int(round(1.0 * cfg.samp_rate / cfg.fft_size / cfg.fft_fps / (1.0 - cfg.fft_voverlap_factor))) if cfg.fft_voverlap_factor>0 else 0)
dsp.set_fft_compression(cfg.fft_compression)
dsp.set_format_conversion(cfg.format_conversion)
apply_csdr_cfg_to_dsp(dsp)

11
plugins/dsp/csdr/plugin.py
View File

@ -59,11 +59,9 @@ class dsp_plugin:
if self.csdr_through: any_chain_base+="csdr through | "
any_chain_base+=self.format_conversion+(" | " if self.format_conversion!="" else "") ##"csdr flowcontrol {flowcontrol} auto 1.5 10 | "
if which == "fft":
if self.fft_averages > 1:
fft_chain_base = any_chain_base+"csdr fft_cc {fft_size} {fft_block_size} | csdr logaveragepower_cf -70 {fft_size} {fft_averages} | csdr fft_exchange_sides_ff {fft_size}"
else:
fft_chain_base = any_chain_base+"csdr fft_cc {fft_size} {fft_block_size} | csdr logpower_cf -70 | csdr fft_exchange_sides_ff {fft_size}"
fft_chain_base = any_chain_base+"csdr fft_cc {fft_size} {fft_block_size} | " + \
("csdr logpower_cf -70 | " if self.fft_averages == 0 else "csdr logaveragepower_cf -70 {fft_size} {fft_averages} | ") + \
"csdr fft_exchange_sides_ff {fft_size}"
if self.fft_compression=="adpcm":
return fft_chain_base+" | csdr compress_fft_adpcm_f_u8 {fft_size}"
else:
@ -127,7 +125,8 @@ class dsp_plugin:
self.fft_averages=fft_averages
def fft_block_size(self):
return self.samp_rate/self.fft_fps/self.fft_averages
if self.fft_averages == 0: return self.samp_rate/self.fft_fps
else: return self.samp_rate/self.fft_fps/self.fft_averages
def set_format_conversion(self,format_conversion):
self.format_conversion=format_conversion