portapack-mayhem/firmware/application/analog_audio_app.cpp

/*
 * 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 "analog_audio_app.hpp"

#include "portapack.hpp"
#include "portapack_shared_memory.hpp"
using namespace portapack;

#include "dsp_fir_taps.hpp"
#include "dsp_iir_config.hpp"

#include "utility.hpp"

struct NBFMMode {
	const fir_taps_real<24> decim_0;
	const fir_taps_real<32> decim_1;
	const fir_taps_real<32> channel;
	const size_t deviation;
};

static constexpr std::array<NBFMMode, 3> nbfm_mode_configs { {
	{ taps_4k25_decim_0, taps_4k25_decim_1, taps_4k25_channel, 2500 },
	{ taps_11k0_decim_0, taps_11k0_decim_1, taps_11k0_channel, 2500 },
	{ taps_16k0_decim_0, taps_16k0_decim_1, taps_16k0_channel, 5000 },
} };

void AnalogAudioModel::configure_nbfm(const size_t index) {
	const auto config = nbfm_mode_configs[index];
	const NBFMConfigureMessage message {
		config.decim_0,
		config.decim_1,
		config.channel,
		2,
		config.deviation,
		audio_24k_hpf_300hz_config,
		audio_24k_deemph_300_6_config
	};
	shared_memory.baseband_queue.push(message);
	clock_manager.set_base_audio_clock_divider(2);
}

void AnalogAudioModel::configure_wfm() {
	const WFMConfigureMessage message {
		taps_200k_wfm_decim_0,
		taps_200k_wfm_decim_1,
		taps_64_lp_156_198,
		75000,
		audio_48k_hpf_30hz_config,
		audio_48k_deemph_2122_6_config
	};
	shared_memory.baseband_queue.push(message);
	clock_manager.set_base_audio_clock_divider(1);
}

struct AMMode {
	const fir_taps_complex<64> channel;
	const AMConfigureMessage::Modulation modulation;
};

static constexpr std::array<AMMode, 3> am_mode_configs { {
	{ taps_6k0_dsb_channel, AMConfigureMessage::Modulation::DSB },
	{ taps_2k8_usb_channel, AMConfigureMessage::Modulation::SSB },
	{ taps_2k8_lsb_channel, AMConfigureMessage::Modulation::SSB },	
} };

void AnalogAudioModel::configure_am(const size_t index) {
	const auto config = am_mode_configs[index];
	const AMConfigureMessage message {
		taps_6k0_decim_0,
		taps_6k0_decim_1,
		taps_6k0_decim_2,
		config.channel,
		config.modulation,
		audio_12k_hpf_300hz_config
	};
	shared_memory.baseband_queue.push(message);
	clock_manager.set_base_audio_clock_divider(4);
}

namespace ui {

/* AnalogAudioView *******************************************************/

AnalogAudioView::AnalogAudioView(
	NavigationView& nav
) {
	add_children({ {
		&rssi,
		&channel,
		&audio,
		&field_frequency,
		&field_lna,
		&field_vga,
		&options_modulation,
		&field_volume,
		&view_frequency_options,
		&view_rf_gain_options,
		&waterfall,
	} });

	field_frequency.set_value(receiver_model.tuning_frequency());
	field_frequency.set_step(receiver_model.frequency_step());
	field_frequency.on_change = [this](rf::Frequency f) {
		this->on_tuning_frequency_changed(f);
	};
	field_frequency.on_edit = [this, &nav]() {
		// TODO: Provide separate modal method/scheme?
		auto new_view = nav.push<FrequencyKeypadView>(receiver_model.tuning_frequency());
		new_view->on_changed = [this](rf::Frequency f) {
			this->on_tuning_frequency_changed(f);
			this->field_frequency.set_value(f);
		};
	};

	field_frequency.on_show_options = [this]() {
		this->on_show_options_frequency();
	};

	field_lna.set_value(receiver_model.lna());
	field_lna.on_change = [this](int32_t v) {
		this->on_lna_changed(v);
	};

	field_lna.on_show_options = [this]() {
		this->on_show_options_rf_gain();
	};

	field_vga.set_value(receiver_model.vga());
	field_vga.on_change = [this](int32_t v_db) {
		this->on_vga_changed(v_db);
	};

	options_modulation.set_by_value(toUType(ReceiverModel::Mode::AMAudio));
	options_modulation.on_change = [this](size_t, OptionsField::value_t v) {
		this->on_modulation_changed(static_cast<ReceiverModel::Mode>(v));
	};

	field_volume.set_value((receiver_model.headphone_volume() - wolfson::wm8731::headphone_gain_range.max).decibel() + 99);
	field_volume.on_change = [this](int32_t v) {
		this->on_headphone_volume_changed(v);
	};

	view_frequency_options.hidden(true);
	view_frequency_options.set_step(receiver_model.frequency_step());
	view_frequency_options.on_change_step = [this](rf::Frequency f) {
		this->on_frequency_step_changed(f);
	};
	view_frequency_options.set_reference_ppm_correction(receiver_model.reference_ppm_correction());
	view_frequency_options.on_change_reference_ppm_correction = [this](int32_t v) {
		this->on_reference_ppm_correction_changed(v);
	};

	view_rf_gain_options.hidden(true);
	view_rf_gain_options.set_rf_amp(receiver_model.rf_amp());
	view_rf_gain_options.on_change_rf_amp = [this](bool enable) {
		this->on_rf_amp_changed(enable);
	};
}

AnalogAudioView::~AnalogAudioView() {
	// TODO: Manipulating audio codec here, and in ui_receiver.cpp. Good to do
	// both?
	audio_codec.headphone_mute();

	receiver_model.disable();
}

void AnalogAudioView::on_hide() {
	// TODO: Terrible kludge because widget system doesn't notify Waterfall that
	// it's being shown or hidden.
	waterfall.on_hide();
	View::on_hide();
}

void AnalogAudioView::set_parent_rect(const Rect new_parent_rect) {
	View::set_parent_rect(new_parent_rect);

	const ui::Rect waterfall_rect { 0, header_height, new_parent_rect.width(), static_cast<ui::Dim>(new_parent_rect.height() - header_height) };
	waterfall.set_parent_rect(waterfall_rect);
}

void AnalogAudioView::focus() {
	field_frequency.focus();
}

void AnalogAudioView::on_tuning_frequency_changed(rf::Frequency f) {
	receiver_model.set_tuning_frequency(f);
}

void AnalogAudioView::on_baseband_bandwidth_changed(uint32_t bandwidth_hz) {
	receiver_model.set_baseband_bandwidth(bandwidth_hz);
}

void AnalogAudioView::on_rf_amp_changed(bool v) {
	receiver_model.set_rf_amp(v);
}

void AnalogAudioView::on_lna_changed(int32_t v_db) {
	receiver_model.set_lna(v_db);
}

void AnalogAudioView::on_vga_changed(int32_t v_db) {
	receiver_model.set_vga(v_db);
}

void AnalogAudioView::on_modulation_changed(const ReceiverModel::Mode mode) {
	// TODO: Terrible kludge because widget system doesn't notify Waterfall that
	// it's being shown or hidden.
	waterfall.on_hide();

	const auto is_wideband_spectrum_mode = (mode == ReceiverModel::Mode::SpectrumAnalysis);
	receiver_model.set_baseband_configuration({
		.mode = toUType(mode),
		.sampling_rate = is_wideband_spectrum_mode ? 20000000U : 3072000U,
		.decimation_factor = 1,
	});
	receiver_model.set_baseband_bandwidth(is_wideband_spectrum_mode ? 12000000 : 1750000);
	receiver_model.enable();

	switch(mode) {
	default:
	case ReceiverModel::Mode::AMAudio:
		model.configure_am(0);
		break;

	case ReceiverModel::Mode::NarrowbandFMAudio:
		model.configure_nbfm(0);
		break;

	case ReceiverModel::Mode::WidebandFMAudio:
		model.configure_wfm();
		break;

	case ReceiverModel::Mode::SpectrumAnalysis:
		break;
	}

	waterfall.on_show();	
}

void AnalogAudioView::on_show_options_frequency() {
	view_rf_gain_options.hidden(true);
	field_lna.set_style(nullptr);

	view_frequency_options.hidden(false);
	field_frequency.set_style(&view_frequency_options.style());
}

void AnalogAudioView::on_show_options_rf_gain() {
	view_frequency_options.hidden(true);
	field_frequency.set_style(nullptr);

	view_rf_gain_options.hidden(false);
	field_lna.set_style(&view_frequency_options.style());
}

void AnalogAudioView::on_frequency_step_changed(rf::Frequency f) {
	receiver_model.set_frequency_step(f);
	field_frequency.set_step(f);
}

void AnalogAudioView::on_reference_ppm_correction_changed(int32_t v) {
	receiver_model.set_reference_ppm_correction(v);
}

void AnalogAudioView::on_headphone_volume_changed(int32_t v) {
	const auto new_volume = volume_t::decibel(v - 99) + wolfson::wm8731::headphone_gain_range.max;
	receiver_model.set_headphone_volume(new_volume);
}

} /* namespace ui */