add tuner app (#2429)

* _

* icon

firmware/application/external/tuner/ui_tuner.cpp

@@ -0,0 +1,256 @@
+/*
+ * copyleft 2024 sommermorgentraum
+ *
+ * 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 "ui_tuner.hpp"
+#include "baseband_api.hpp"
+#include "audio.hpp"
+#include "portapack.hpp"
+
+using namespace portapack;
+
+namespace ui::external_app::tuner {
+
+TunerView::TunerView(NavigationView& nav)
+    : nav_{nav} {
+    baseband::run_prepared_image(portapack::memory::map::m4_code.base());  // proc_audio_beep baseband is external too
+
+    add_children({
+        &labels,
+        &field_volume,
+        &options_instrument,
+        &options_note,
+        &button_play_stop,
+        &text_note_frequency,
+        &text_note_octave_shift,
+    });
+
+    audio::set_rate(audio::Rate::Hz_24000);
+
+    options_instrument.on_change = [this](size_t, int32_t value) {
+        const Instrument* selected_instrument = nullptr;
+
+        switch (value) {
+            case 0:
+                selected_instrument = &guitar;
+                break;
+            case 1:
+                selected_instrument = &violin;
+                break;
+            case 2:
+                selected_instrument = &pitch_fork;
+                break;
+        }
+
+        if (selected_instrument) {
+            update_notes_for_instrument(*selected_instrument);
+        }
+
+        update_current_note();
+    };
+
+    options_note.on_change = [this](size_t, int32_t index) {
+        const Instrument* current_instrument = nullptr;
+        switch (options_instrument.selected_index_value()) {
+            case 0:
+                current_instrument = &guitar;
+                break;
+            case 1:
+                current_instrument = &violin;
+                break;
+            case 2:
+                current_instrument = &pitch_fork;
+                break;
+        }
+
+        if (current_instrument) {
+            auto it = current_instrument->notes.begin();
+            std::advance(it, index);
+            if (it != current_instrument->notes.end()) {
+                current_note_frequency = it->second.frequency;
+                current_note_sample_rate = it->second.sample_rate;
+                current_note_octave_shift = it->second.octave_shift;
+            }
+        }
+
+        update_current_note();
+    };
+
+    button_play_stop.on_select = [this]() {
+        if (current_note_playing) {
+            stop_play();
+        } else {
+            play_change_note();
+        }
+    };
+
+    options_instrument.set_selected_index(0);
+    update_notes_for_instrument(guitar);
+    update_current_note();
+
+    field_volume.set_value(0);  // seems that a change is required to force update, so setting to 0 first
+    field_volume.set_value(99);
+
+    audio::set_rate(audio::Rate::Hz_24000);
+    audio::output::start();
+}
+
+TunerView::~TunerView() {
+    receiver_model.disable();
+    baseband::shutdown();
+    audio::output::stop();
+}
+
+void TunerView::focus() {
+    options_instrument.focus();
+}
+
+void TunerView::update_notes_for_instrument(const Instrument& instrument) {
+    std::vector<OptionsField::option_t> note_options;
+    size_t index = 0;
+
+    for (const auto& note_pair : instrument.notes) {
+        note_options.emplace_back(OptionsField::option_t{
+            note_pair.first,
+            index++});
+    }
+
+    options_note.set_options(note_options);
+    if (!note_options.empty()) {
+        options_note.set_selected_index(0);
+    }
+}
+
+void TunerView::update_current_note() {
+    const Instrument* current_instrument = nullptr;
+
+    switch (options_instrument.selected_index_value()) {
+        case 0:
+            current_instrument = &guitar;
+            break;
+        case 1:
+            current_instrument = &violin;
+            break;
+        case 2:
+            current_instrument = &pitch_fork;
+            break;
+    }
+
+    if (current_instrument) {
+        std::string note_name = options_note.selected_index_name();
+
+        // map
+        auto note_it = current_instrument->notes.find(note_name);
+        if (note_it != current_instrument->notes.end()) {
+            current_note_frequency = note_it->second.frequency;
+            current_note_sample_rate = note_it->second.sample_rate;
+            current_note_octave_shift = note_it->second.octave_shift;
+
+            text_note_frequency.set(std::to_string(current_note_frequency));
+            text_note_octave_shift.set(std::to_string(current_note_octave_shift));
+
+            set_dirty();
+
+            if (current_note_playing) {
+                play_change_note();
+            }
+        }
+    }
+}
+
+void TunerView::stop_play() {
+    baseband::request_beep_stop();
+    current_note_playing = false;
+    button_play_stop.set_bitmap(&bitmap_icon_replay);
+}
+
+void TunerView::play_change_note() {
+    if (current_note_playing) {
+        baseband::request_beep_stop();
+        audio::set_rate(current_note_sample_rate);
+        baseband::request_audio_beep(current_note_frequency, protected_sample_rate(current_note_sample_rate), 0);
+    } else {
+        audio::set_rate(current_note_sample_rate);
+        baseband::request_audio_beep(current_note_frequency, protected_sample_rate(current_note_sample_rate), 0);
+    }
+    current_note_playing = true;
+    button_play_stop.set_bitmap(&bitmap_icon_sleep);
+    set_dirty();
+}
+
+uint32_t TunerView::protected_sample_rate(audio::Rate r) {
+    switch (r) {
+        case audio::Rate::Hz_12000:
+            return 12000;
+        case audio::Rate::Hz_24000:
+            return 24000;
+        case audio::Rate::Hz_48000:
+            return 48000;
+        default:
+            return 24000;
+    }
+}
+
+void TunerView::paint(Painter& painter) {
+    View::paint(painter);
+
+    painter.fill_rectangle(
+        {screen_width / 4, 8 * 16, screen_width / 2, 6 * 16},
+        Theme::getInstance()->bg_darkest->background);
+
+    if (!current_note_playing) return;
+
+    painter.fill_rectangle(
+        {screen_width / 4, 10 * 16, 2, 2 * 16},
+        Theme::getInstance()->fg_light->foreground);
+
+    painter.fill_rectangle(
+        {screen_width / 4, 12 * 16, screen_width / 4 * 2 + 2, 2},
+        Theme::getInstance()->fg_light->foreground);
+
+    painter.fill_rectangle(
+        {(screen_width / 4) * 3, 10 * 16, 2, 2 * 16},
+        Theme::getInstance()->fg_light->foreground);
+
+    painter.draw_string(
+        {screen_width / 4 - 2 * 8, 8 * 16},
+        (current_note_octave_shift == 0) ? *Theme::getInstance()->bg_darkest : *Theme::getInstance()->fg_red,
+        std::to_string(current_note_frequency));
+
+    int16_t real_frequency = current_note_frequency;
+    if (current_note_octave_shift > 0) {
+        for (int i = 0; i < current_note_octave_shift; i++) {
+            real_frequency *= 2;
+        }
+    } else if (current_note_octave_shift < 0) {
+        for (int i = 0; i > current_note_octave_shift; i--) {
+            real_frequency /= 2;
+        }
+    }
+    painter.draw_string({(screen_width / 4) * 3 - 2 * 8, 8 * 16},
+                        (current_note_octave_shift == 0) ? *Theme::getInstance()->bg_darkest : *Theme::getInstance()->fg_red,
+                        std::to_string(real_frequency));
+
+    painter.draw_string({screen_width / 2 - 3 * 16, 13 * 16},
+                        (current_note_octave_shift == 0) ? *Theme::getInstance()->bg_darkest : *Theme::getInstance()->fg_red,
+                        std::to_string(current_note_octave_shift) + " * 8ev");
+}
+
+}  // namespace ui::external_app::tuner