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Push static variables and spectrum calc into BasebandProcessor.

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This commit is contained in:
Jared Boone 2015-08-27 10:48:29 -07:00
parent de0777f476
commit 04d05368c7
1 changed files with 35 additions and 28 deletions
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63
firmware/baseband/main.cpp
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@ -80,18 +80,39 @@
constexpr auto baseband_thread_priority = NORMALPRIO + 20; constexpr auto baseband_thread_priority = NORMALPRIO + 20;
constexpr auto rssi_thread_priority = NORMALPRIO + 10; constexpr auto rssi_thread_priority = NORMALPRIO + 10;
static volatile bool channel_spectrum_request_update { false };
static std::array<complex16_t, 256> channel_spectrum;
static uint32_t channel_spectrum_sampling_rate { 0 };
static uint32_t channel_filter_pass_frequency { 0 };
static uint32_t channel_filter_stop_frequency { 0 };
class BasebandProcessor { class BasebandProcessor {
public: public:
virtual ~BasebandProcessor() = default; virtual ~BasebandProcessor() = default;
virtual void execute(buffer_c8_t buffer) = 0; 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: protected:
void feed_channel_stats(const buffer_c16_t channel) { void feed_channel_stats(const buffer_c16_t channel) {
channel_stats.feed( channel_stats.feed(
@ -136,6 +157,12 @@ private:
AudioStatsCollector audio_stats; AudioStatsCollector audio_stats;
AudioStatisticsMessage audio_stats_message; 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) { void post_channel_stats_message(const ChannelStatistics statistics) {
channel_stats_message.statistics = statistics; channel_stats_message.statistics = statistics;
shared_memory.application_queue.push(channel_stats_message); shared_memory.application_queue.push(channel_stats_message);
@ -623,28 +650,8 @@ private:
} }
void handle_spectrum() { void handle_spectrum() {
if( channel_spectrum_request_update ) { if( baseband_processor ) {
/* Decimated buffer is full. Compute spectrum. */ baseband_processor->update_spectrum();
std::array<std::complex<float>, channel_spectrum.size()> 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);
} }
} }
}; };