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https://github.com/eried/portapack-mayhem.git
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Extract spectrum collector from BasebandProcessor.
Code size improvement, and less confused classes. :-)
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parent
75b1cc25ff
commit
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15 changed files with 193 additions and 86 deletions
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@ -34,31 +34,6 @@
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#include <cstddef>
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#include <algorithm>
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void BasebandProcessor::update_spectrum() {
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// Called from idle thread (after EVT_MASK_SPECTRUM is flagged)
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if( channel_spectrum_request_update ) {
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/* Decimated buffer is full. Compute spectrum. */
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channel_spectrum_request_update = false;
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fft_c_preswapped(channel_spectrum);
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ChannelSpectrumMessage spectrum_message;
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for(size_t i=0; i<spectrum_message.spectrum.db.size(); i++) {
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const auto mag2 = magnitude_squared(channel_spectrum[i]);
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const float db = complex16_mag_squared_to_dbv_norm(mag2);
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constexpr float mag_scale = 5.0f;
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const unsigned int v = (db * mag_scale) + 255.0f;
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spectrum_message.spectrum.db[i] = std::max(0U, std::min(255U, v));
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}
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/* TODO: Rename .db -> .magnitude, or something more (less!) accurate. */
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spectrum_message.spectrum.db_count = spectrum_message.spectrum.db.size();
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spectrum_message.spectrum.sampling_rate = channel_spectrum_sampling_rate;
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spectrum_message.spectrum.channel_filter_pass_frequency = channel_filter_pass_frequency;
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spectrum_message.spectrum.channel_filter_stop_frequency = channel_filter_stop_frequency;
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shared_memory.application_queue.push(spectrum_message);
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}
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}
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void BasebandProcessor::feed_channel_stats(const buffer_c16_t& channel) {
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channel_stats.feed(
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channel,
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@ -69,21 +44,6 @@ void BasebandProcessor::feed_channel_stats(const buffer_c16_t& channel) {
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);
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}
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void BasebandProcessor::feed_channel_spectrum(
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const buffer_c16_t& channel,
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const uint32_t filter_pass_frequency,
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const uint32_t filter_stop_frequency
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) {
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channel_filter_pass_frequency = filter_pass_frequency;
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channel_filter_stop_frequency = filter_stop_frequency;
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channel_spectrum_decimator.feed(
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channel,
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[this](const buffer_c16_t& data) {
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this->post_channel_spectrum_message(data);
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}
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);
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}
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void BasebandProcessor::fill_audio_buffer(const buffer_s16_t& audio) {
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auto audio_buffer = audio::dma::tx_empty_buffer();;
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for(size_t i=0; i<audio_buffer.count; i++) {
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@ -94,15 +54,6 @@ void BasebandProcessor::fill_audio_buffer(const buffer_s16_t& audio) {
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feed_audio_stats(audio);
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}
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void BasebandProcessor::post_channel_spectrum_message(const buffer_c16_t& data) {
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if( !channel_spectrum_request_update ) {
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fft_swap(data, channel_spectrum);
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channel_spectrum_sampling_rate = data.sampling_rate;
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channel_spectrum_request_update = true;
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events_flag(EVT_MASK_SPECTRUM);
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}
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}
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void BasebandProcessor::feed_audio_stats(const buffer_s16_t& audio) {
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audio_stats.feed(
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audio,
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