/* * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc. * * This file is part of PortaPack. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; see the file COPYING. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, * Boston, MA 02110-1301, USA. */ #include "proc_am_audio.hpp" #include "audio_output.hpp" #include "event_m4.hpp" #include <array> void NarrowbandAMAudio::execute(const buffer_c8_t& buffer) { if( !configured ) { return; } const auto decim_0_out = decim_0.execute(buffer, dst_buffer); const auto decim_1_out = decim_1.execute(decim_0_out, dst_buffer); channel_spectrum.feed(decim_1_out, channel_filter_low_f, channel_filter_high_f, channel_filter_transition); const auto decim_2_out = decim_2.execute(decim_1_out, dst_buffer); const auto channel_out = channel_filter.execute(decim_2_out, dst_buffer); // TODO: Feed channel_stats post-decimation data? feed_channel_stats(channel_out); auto audio = demodulate(channel_out); audio_compressor.execute_in_place(audio); audio_output.write(audio); } buffer_f32_t NarrowbandAMAudio::demodulate(const buffer_c16_t& channel) { if( modulation_ssb ) { return demod_ssb.execute(channel, audio_buffer); } else { return demod_am.execute(channel, audio_buffer); } } void NarrowbandAMAudio::on_message(const Message* const message) { switch(message->id) { case Message::ID::UpdateSpectrum: case Message::ID::SpectrumStreamingConfig: channel_spectrum.on_message(message); break; case Message::ID::AMConfigure: configure(*reinterpret_cast<const AMConfigureMessage*>(message)); break; case Message::ID::CaptureConfig: capture_config(*reinterpret_cast<const CaptureConfigMessage*>(message)); break; default: break; } } void NarrowbandAMAudio::configure(const AMConfigureMessage& message) { constexpr size_t decim_0_input_fs = baseband_fs; constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0.decimation_factor; constexpr size_t decim_1_input_fs = decim_0_output_fs; constexpr size_t decim_1_output_fs = decim_1_input_fs / decim_1.decimation_factor; constexpr size_t decim_2_input_fs = decim_1_output_fs; constexpr size_t decim_2_output_fs = decim_2_input_fs / decim_2_decimation_factor; constexpr size_t channel_filter_input_fs = decim_2_output_fs; //const size_t channel_filter_output_fs = channel_filter_input_fs / channel_filter_decimation_factor; decim_0.configure(message.decim_0_filter.taps, 33554432); decim_1.configure(message.decim_1_filter.taps, 131072); decim_2.configure(message.decim_2_filter.taps, decim_2_decimation_factor); channel_filter.configure(message.channel_filter.taps, channel_filter_decimation_factor); channel_filter_low_f = message.channel_filter.low_frequency_normalized * channel_filter_input_fs; channel_filter_high_f = message.channel_filter.high_frequency_normalized * channel_filter_input_fs; channel_filter_transition = message.channel_filter.transition_normalized * channel_filter_input_fs; channel_spectrum.set_decimation_factor(1.0f); modulation_ssb = (message.modulation == AMConfigureMessage::Modulation::SSB); audio_output.configure(message.audio_hpf_config); configured = true; } void NarrowbandAMAudio::capture_config(const CaptureConfigMessage& message) { if( message.config ) { audio_output.set_stream(std::make_unique<StreamInput>(message.config)); } else { audio_output.set_stream(nullptr); } } int main() { EventDispatcher event_dispatcher { std::make_unique<NarrowbandAMAudio>() }; event_dispatcher.run(); return 0; }