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Spectrum streaming control, spectrum attributes back in each frame.

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TODO: This feels kinda complex, and there's some repeated Processor code that needs to be refactored into a base class.
This commit is contained in:
Jared Boone 2016-01-10 10:42:20 -08:00
parent 0647f26707
commit d821afc60d
10 changed files with 101 additions and 29 deletions
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30
firmware/baseband/spectrum_collector.cpp
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@ -29,6 +29,16 @@
#include <algorithm>
void SpectrumCollector::start() {
streaming = true;
ChannelSpectrumConfigMessage message { &fifo };
shared_memory.application_queue.push(message);
}
void SpectrumCollector::stop() {
streaming = false;
}
void SpectrumCollector::set_decimation_factor(
const size_t decimation_factor
) {
@ -48,7 +58,7 @@ void SpectrumCollector::feed(
// Called from baseband processing thread.
channel_filter_pass_frequency = filter_pass_frequency;
channel_filter_stop_frequency = filter_stop_frequency;
post_configuration_message();
channel_spectrum_decimator.feed(
channel,
[this](const buffer_c16_t& data) {
@ -59,7 +69,7 @@ void SpectrumCollector::feed(
void SpectrumCollector::post_message(const buffer_c16_t& data) {
// Called from baseband processing thread.
if( !channel_spectrum_request_update ) {
if( streaming && !channel_spectrum_request_update ) {
fft_swap(data, channel_spectrum);
channel_spectrum_sampling_rate = data.sampling_rate;
channel_spectrum_request_update = true;
@ -67,24 +77,17 @@ void SpectrumCollector::post_message(const buffer_c16_t& data) {
}
}
void SpectrumCollector::post_configuration_message() {
ChannelSpectrumConfigMessage message {
channel_spectrum_sampling_rate,
channel_filter_pass_frequency,
channel_filter_stop_frequency,
&fifo
};
shared_memory.application_queue.push(message);
}
void SpectrumCollector::update() {
// Called from idle thread (after EVT_MASK_SPECTRUM is flagged)
if( channel_spectrum_request_update ) {
if( streaming && channel_spectrum_request_update ) {
/* Decimated buffer is full. Compute spectrum. */
channel_spectrum_request_update = false;
fft_c_preswapped(channel_spectrum);
ChannelSpectrum spectrum;
spectrum.sampling_rate = channel_spectrum_sampling_rate;
spectrum.channel_filter_pass_frequency = channel_filter_pass_frequency;
spectrum.channel_filter_stop_frequency = channel_filter_stop_frequency;
for(size_t i=0; i<spectrum.db.size(); i++) {
// Three point Hamming window.
const auto corrected_sample = channel_spectrum[i] * 0.54f
@ -95,7 +98,6 @@ void SpectrumCollector::update() {
const unsigned int v = (db * mag_scale) + 255.0f;
spectrum.db[i] = std::max(0U, std::min(255U, v));
}
fifo.in(spectrum);
}
}