mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-15 04:28:10 +00:00
303 lines
8.1 KiB
C++
303 lines
8.1 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __UI_SPECTRUM_H__
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#define __UI_SPECTRUM_H__
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#include "ui.hpp"
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#include "ui_widget.hpp"
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#include "spectrum_color_lut.hpp"
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#include "portapack.hpp"
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using namespace portapack;
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#include "message.hpp"
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#include <cstdint>
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#include <cmath>
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#include <array>
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#include "string_format.hpp"
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namespace ui {
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namespace spectrum {
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class FrequencyScale : public Widget {
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public:
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void on_show() override {
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clear();
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}
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void set_spectrum_sampling_rate(const uint32_t new_sampling_rate, const size_t new_spectrum_bins) {
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if( (spectrum_sampling_rate != new_sampling_rate) ||
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(spectrum_bins != new_spectrum_bins) ) {
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spectrum_sampling_rate = new_sampling_rate;
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spectrum_bins = new_spectrum_bins;
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set_dirty();
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}
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}
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void set_channel_filter(
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const uint32_t pass_frequency,
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const uint32_t stop_frequency
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) {
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if( (channel_filter_pass_frequency != pass_frequency) ||
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(channel_filter_stop_frequency != stop_frequency) ) {
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channel_filter_pass_frequency = pass_frequency;
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channel_filter_stop_frequency = stop_frequency;
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set_dirty();
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}
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}
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void paint(Painter& painter) override {
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const auto r = screen_rect();
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clear_background(painter, r);
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if( !spectrum_sampling_rate || !spectrum_bins ) {
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// Can't draw without non-zero scale.
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return;
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}
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draw_filter_ranges(painter, r);
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draw_frequency_ticks(painter, r);
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}
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private:
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static constexpr Dim filter_band_height = 4;
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uint32_t spectrum_sampling_rate { 0 };
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size_t spectrum_bins { 0 };
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uint32_t channel_filter_pass_frequency { 0 };
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uint32_t channel_filter_stop_frequency { 0 };
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void clear() {
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spectrum_sampling_rate = 0;
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spectrum_bins = 0;
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set_dirty();
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}
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void clear_background(Painter& painter, const Rect r) {
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painter.fill_rectangle(r, Color::black());
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}
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void draw_frequency_ticks(Painter& painter, const Rect r) {
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const auto x_center = r.width() / 2;
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const Rect tick {
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static_cast<Coord>(r.left() + x_center), r.top(),
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1, r.height()
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};
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painter.fill_rectangle(tick, Color::white());
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constexpr uint32_t tick_count_max = 4;
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float rough_tick_interval = float(spectrum_sampling_rate) / tick_count_max;
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size_t magnitude = 1;
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size_t magnitude_n = 0;
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while(rough_tick_interval >= 10.0f) {
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rough_tick_interval /= 10;
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magnitude *= 10;
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magnitude_n += 1;
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}
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const size_t tick_interval = std::ceil(rough_tick_interval);
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size_t tick_offset = tick_interval;
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while((tick_offset * magnitude) < spectrum_sampling_rate / 2) {
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const Dim pixel_offset = tick_offset * magnitude * spectrum_bins / spectrum_sampling_rate;
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const std::string zero_pad =
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((magnitude_n % 3) == 0) ? "" :
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((magnitude_n % 3) == 1) ? "0" : "00";
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const std::string unit =
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(magnitude_n >= 6) ? "M" :
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(magnitude_n >= 3) ? "k" : "";
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const std::string label = to_string_dec_uint(tick_offset) + zero_pad + unit;
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const Coord offset_low = static_cast<Coord>(r.left() + x_center - pixel_offset);
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const Rect tick_low { offset_low, r.top(), 1, r.height() };
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painter.fill_rectangle(tick_low, Color::white());
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painter.draw_string({ static_cast<Coord>(offset_low + 2), r.top() }, style(), label );
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const Coord offset_high = static_cast<Coord>(r.left() + x_center + pixel_offset);
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const Rect tick_high { offset_high, r.top(), 1, r.height() };
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painter.fill_rectangle(tick_high, Color::white());
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painter.draw_string({ static_cast<Coord>(offset_high + 2), r.top() }, style(), label );
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tick_offset += tick_interval;
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}
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}
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void draw_filter_ranges(Painter& painter, const Rect r) {
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if( channel_filter_pass_frequency ) {
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const auto x_center = r.width() / 2;
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const auto pass_offset = channel_filter_pass_frequency * spectrum_bins / spectrum_sampling_rate;
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const auto stop_offset = channel_filter_stop_frequency * spectrum_bins / spectrum_sampling_rate;
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const auto pass_x_lo = x_center - pass_offset;
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const auto pass_x_hi = x_center + pass_offset;
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if( channel_filter_stop_frequency ) {
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const auto stop_x_lo = x_center - stop_offset;
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const auto stop_x_hi = x_center + stop_offset;
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const Rect r_stop_lo {
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static_cast<Coord>(r.left() + stop_x_lo), static_cast<Coord>(r.bottom() - filter_band_height),
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static_cast<Dim>(pass_x_lo - stop_x_lo), filter_band_height
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};
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painter.fill_rectangle(
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r_stop_lo,
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Color::yellow()
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);
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const Rect r_stop_hi {
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static_cast<Coord>(r.left() + pass_x_hi), static_cast<Coord>(r.bottom() - filter_band_height),
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static_cast<Dim>(stop_x_hi - pass_x_hi), filter_band_height
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};
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painter.fill_rectangle(
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r_stop_hi,
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Color::yellow()
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);
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}
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const Rect r_pass {
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static_cast<Coord>(r.left() + pass_x_lo), static_cast<Coord>(r.bottom() - filter_band_height),
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static_cast<Dim>(pass_x_hi - pass_x_lo), filter_band_height
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};
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painter.fill_rectangle(
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r_pass,
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Color::green()
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);
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}
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}
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};
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class WaterfallView : public Widget {
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public:
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void on_show() override {
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clear();
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const auto screen_r = screen_rect();
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display.scroll_set_area(screen_r.top(), screen_r.bottom());
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}
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void on_hide() override {
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/* TODO: Clear region to eliminate brief flash of content at un-shifted
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* position?
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*/
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display.scroll_disable();
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}
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void paint(Painter& painter) override {
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// Do nothing.
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(void)painter;
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}
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void on_channel_spectrum(
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const ChannelSpectrum& spectrum
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) {
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/* TODO: static_assert that message.spectrum.db.size() >= pixel_row.size() */
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std::array<Color, 240> pixel_row;
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for(size_t i=0; i<120; i++) {
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const auto pixel_color = spectrum_rgb3_lut[spectrum.db[256 - 120 + i]];
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pixel_row[i] = pixel_color;
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}
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for(size_t i=120; i<240; i++) {
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const auto pixel_color = spectrum_rgb3_lut[spectrum.db[i - 120]];
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pixel_row[i] = pixel_color;
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}
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const auto draw_y = display.scroll(1);
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display.draw_pixels(
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{ { 0, draw_y }, { pixel_row.size(), 1 } },
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pixel_row
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);
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}
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private:
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void clear() {
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display.fill_rectangle(
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screen_rect(),
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Color::black()
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);
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}
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};
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class WaterfallWidget : public View {
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public:
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WaterfallWidget() {
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add_children({
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&waterfall_view,
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&frequency_scale,
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});
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}
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void on_show() override {
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context().message_map().register_handler(Message::ID::ChannelSpectrum,
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[this](const Message* const p) {
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this->on_channel_spectrum(reinterpret_cast<const ChannelSpectrumMessage*>(p)->spectrum);
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}
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);
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}
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void on_hide() override {
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context().message_map().unregister_handler(Message::ID::ChannelSpectrum);
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}
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void set_parent_rect(const Rect new_parent_rect) override {
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constexpr Dim scale_height = 20;
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View::set_parent_rect(new_parent_rect);
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frequency_scale.set_parent_rect({ 0, 0, new_parent_rect.width(), scale_height });
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waterfall_view.set_parent_rect({
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0, scale_height,
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new_parent_rect.width(),
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static_cast<Dim>(new_parent_rect.height() - scale_height)
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});
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}
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void paint(Painter& painter) override {
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// TODO:
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(void)painter;
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}
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private:
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WaterfallView waterfall_view;
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FrequencyScale frequency_scale;
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void on_channel_spectrum(const ChannelSpectrum& spectrum) {
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waterfall_view.on_channel_spectrum(spectrum);
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frequency_scale.set_spectrum_sampling_rate(spectrum.sampling_rate, spectrum.db_count);
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frequency_scale.set_channel_filter(
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spectrum.channel_filter_pass_frequency,
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spectrum.channel_filter_stop_frequency
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);
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}
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};
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} /* namespace spectrum */
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} /* namespace ui */
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#endif/*__UI_SPECTRUM_H__*/
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