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Extract BasebandProcessor into separate files.

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This commit is contained in:
Jared Boone 2015-08-27 11:11:08 -07:00
parent b0e9afe26c
commit 6bf61cbe88
4 changed files with 201 additions and 116 deletions
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117
firmware/baseband/main.cpp
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@ -42,7 +42,6 @@
#include "dsp_decimate.hpp"
#include "dsp_demodulate.hpp"
#include "dsp_fft.hpp"
#include "dsp_fir_taps.hpp"
#include "dsp_iir.hpp"
#include "dsp_iir_config.hpp"
@ -50,12 +49,10 @@
#include "baseband_stats_collector.hpp"
#include "rssi_stats_collector.hpp"
#include "channel_stats_collector.hpp"
#include "audio_stats_collector.hpp"
#include "channel_decimator.hpp"
#include "baseband_processor.hpp"
#include "block_decimator.hpp"
#include "clock_recovery.hpp"
#include "access_code_correlator.hpp"
#include "packet_builder.hpp"
@ -80,118 +77,6 @@
constexpr auto baseband_thread_priority = NORMALPRIO + 20;
constexpr auto rssi_thread_priority = NORMALPRIO + 10;
class BasebandProcessor {
public:
virtual ~BasebandProcessor() = default;
virtual void execute(buffer_c8_t buffer) = 0;
void update_spectrum() {
// Called from idle thread (after EVT_MASK_SPECTRUM is flagged)
if( channel_spectrum_request_update ) {
/* Decimated buffer is full. Compute spectrum. */
std::array<std::complex<float>, 256> samples_swapped;
fft_swap(channel_spectrum, samples_swapped);
channel_spectrum_request_update = false;
fft_c_preswapped(samples_swapped);
ChannelSpectrumMessage spectrum_message;
for(size_t i=0; i<spectrum_message.spectrum.db.size(); i++) {
const auto mag2 = magnitude_squared(samples_swapped[i]);
const float db = complex16_mag_squared_to_dbv_norm(mag2);
constexpr float mag_scale = 5.0f;
const unsigned int v = (db * mag_scale) + 255.0f;
spectrum_message.spectrum.db[i] = std::max(0U, std::min(255U, v));
}
/* TODO: Rename .db -> .magnitude, or something more (less!) accurate. */
spectrum_message.spectrum.db_count = spectrum_message.spectrum.db.size();
spectrum_message.spectrum.sampling_rate = channel_spectrum_sampling_rate;
spectrum_message.spectrum.channel_filter_pass_frequency = channel_filter_pass_frequency;
spectrum_message.spectrum.channel_filter_stop_frequency = channel_filter_stop_frequency;
shared_memory.application_queue.push(spectrum_message);
}
}
protected:
void feed_channel_stats(const buffer_c16_t channel) {
channel_stats.feed(
channel,
[this](const ChannelStatistics statistics) {
this->post_channel_stats_message(statistics);
}
);
}
void feed_channel_spectrum(
const buffer_c16_t channel,
const uint32_t filter_pass_frequency,
const uint32_t filter_stop_frequency
) {
channel_filter_pass_frequency = filter_pass_frequency;
channel_filter_stop_frequency = filter_stop_frequency;
channel_spectrum_decimator.feed(
channel,
[this](const buffer_c16_t data) {
this->post_channel_spectrum_message(data);
}
);
}
void fill_audio_buffer(const buffer_s16_t audio) {
auto audio_buffer = audio::dma::tx_empty_buffer();;
for(size_t i=0; i<audio_buffer.count; i++) {
audio_buffer.p[i].left = audio_buffer.p[i].right = audio.p[i];
}
i2s::i2s0::tx_unmute();
feed_audio_stats(audio);
}
private:
BlockDecimator<256> channel_spectrum_decimator { 4 };
ChannelStatsCollector channel_stats;
ChannelStatisticsMessage channel_stats_message;
AudioStatsCollector audio_stats;
AudioStatisticsMessage audio_stats_message;
volatile bool channel_spectrum_request_update { false };
std::array<complex16_t, 256> channel_spectrum;
uint32_t channel_spectrum_sampling_rate { 0 };
uint32_t channel_filter_pass_frequency { 0 };
uint32_t channel_filter_stop_frequency { 0 };
void post_channel_stats_message(const ChannelStatistics statistics) {
channel_stats_message.statistics = statistics;
shared_memory.application_queue.push(channel_stats_message);
}
void post_channel_spectrum_message(const buffer_c16_t data) {
if( !channel_spectrum_request_update ) {
channel_spectrum_request_update = true;
std::copy(&data.p[0], &data.p[data.count], channel_spectrum.begin());
channel_spectrum_sampling_rate = data.sampling_rate;
events_flag(EVT_MASK_SPECTRUM);
}
}
void feed_audio_stats(const buffer_s16_t audio) {
audio_stats.feed(
audio,
[this](const AudioStatistics statistics) {
this->post_audio_stats_message(statistics);
}
);
}
void post_audio_stats_message(const AudioStatistics statistics) {
audio_stats_message.statistics = statistics;
shared_memory.application_queue.push(audio_stats_message);
}
};
class NarrowbandAMAudio : public BasebandProcessor {
public:
void execute(buffer_c8_t buffer) override {