and3rson · and3rson · Apr 13, 2024 · Apr 4, 2024 · Apr 4, 2024 · Apr 4, 2024
diff --git a/docs/about/index.rst b/docs/about/index.rst
@@ -1,5 +1,5 @@
-По проєкт
-===========
+Про проєкт
+==========
 
 .. include:: what_is_lilka.rst
 

diff --git a/docs/library/display.rst b/docs/library/display.rst
@@ -9,6 +9,9 @@
 .. doxygenclass:: lilka::Canvas
     :members:
 
+.. doxygenclass:: lilka::GFX
+    :members:
+
 .. doxygenclass:: lilka::Image
     :members:
 

diff --git a/firmware/keira/src/apps/launcher.cpp b/firmware/keira/src/apps/launcher.cpp
@@ -27,6 +27,7 @@
 #include "nes/nesapp.h"
 #include "ftp/ftp_server.h"
 #include "weather/weather.h"
+#include "liltracker/liltracker.h"
 
 #include "icons/demos.h"
 #include "icons/sdcard.h"
@@ -66,6 +67,7 @@ ITEM_LIST app_items = {
          ITEM_APP("I2C-сканер", ScanI2CApp),
          ITEM_APP("GPIO-мененджер", GPIOManagerApp)},
     ),
+    ITEM_APP("ЛілТрекер", LilTrackerApp),
     ITEM_APP("Летріс", LetrisApp),
     ITEM_APP("Тамагочі", TamagotchiApp),
     ITEM_APP("Погода", WeatherApp),
@@ -267,6 +269,8 @@ void LauncherApp::selectFile(String path) {
         AppManager::getInstance()->runApp(new LuaFileRunnerApp(path));
     } else if (lowerCasedPath.endsWith(".js")) {
         AppManager::getInstance()->runApp(new MJSApp(path));
+    } else if (lowerCasedPath.endsWith(".lt")) {
+        AppManager::getInstance()->runApp(new LilTrackerApp(path));
     } else {
         // Get file size
         // lilka::serial_log(path.c_str());

diff --git a/firmware/keira/src/apps/liltracker/config.h b/firmware/keira/src/apps/liltracker/config.h
@@ -0,0 +1,6 @@
+#pragma once
+
+#define CHANNEL_COUNT 3
+#define DEFAULT_BPM   400
+#define CHANNEL_SIZE  32
+#define MAX_VOLUME    128
diff --git a/firmware/keira/src/apps/liltracker/effects.cpp b/firmware/keira/src/apps/liltracker/effects.cpp
@@ -0,0 +1,111 @@
+#include <math.h>
+#include <lilka/fmath.h>
+
+#include "effects.h"
+#include "note.h"
+
+void effect_none(float time, float relTime, float* frequency, float* amplitude, float* phase, uint8_t param) {
+    (void)time;
+    (void)relTime;
+    (void)frequency;
+    (void)amplitude;
+    (void)phase;
+    (void)param;
+}
+
+void effect_arpeggio(float time, float relTime, float* frequency, float* amplitude, float* phase, uint8_t param) {
+    // This effect arpeggiates the note by changing the frequency of the note at a fixed interval.
+    // It mimics NES arpeggio that consists of up to 3 notes.
+
+    (void)relTime;
+    (void)amplitude;
+    (void)param;
+
+    constexpr int8_t count = 3; // 3 notes
+
+    uint8_t note2offset = (param & 0xF0) >> 4;
+    uint8_t note3offset = (param & 0x0F);
+
+    // duration of each note in milliseconds is 1/60 of a second
+    float stepDurationMs = 1000.0f / 60.0f;
+
+    // Calculate current arpeggio step
+    int8_t step = ((int64_t)(time / (stepDurationMs / 1000.0f))) % count;
+
+    if (step == 0) {
+        // No change
+    } else if (step == 1) {
+        // Use the second note
+        *frequency = modulate_frequency(*frequency, note2offset);
+    } else if (step == 2) {
+        // Use the third note
+        *frequency = modulate_frequency(*frequency, note3offset);
+    }
+}
+
+void effect_vibrato(float time, float relTime, float* frequency, float* amplitude, float* phase, uint8_t param) {
+    // This effect modulates the frequency of the note with a sine wave.
+    // Upper nibble of the parameter is the speed of the vibrato (in Hz)
+    // Lower nibble of the parameter is the depth of the vibrato (0 to 15, 0 = no vibrato, 15 = one full semitone vibrato)
+
+    (void)relTime;
+    (void)frequency;
+    (void)amplitude;
+
+    uint8_t vibratoFrequency = (param & 0xF0) >> 4;
+    uint8_t vibratoDepth = param & 0x0F;
+
+    // Calculate the depth of vibrato in terms of radians
+    float phaseModulation = vibratoDepth / 15.0f * lilka::fSin360(time * vibratoFrequency * 360);
+
+    // Apply the vibrato phase modulation
+    *phase += phaseModulation;
+}
+
+void effect_tremolo(float time, float relTime, float* frequency, float* amplitude, float* phase, uint8_t param) {
+    // This effect modulates the amplitude of the note with a sine wave.
+    // Upper nibble of the parameter is the speed of the tremolo (in Hz)
+    // Lower nibble of the parameter is the depth of the tremolo (0 to 15, 0 = no tremolo, 15 = max tremolo)
+
+    (void)time;
+    (void)relTime;
+    (void)frequency;
+    (void)phase;
+
+    uint8_t tremoloFrequency = (param & 0xF0) >> 4;
+    uint8_t tremoloDepth = (param & 0x0F);
+
+    // Calculate the tremolo into a range of 0.0 to 1.0
+    float tremolo = (lilka::fSin360(time * tremoloFrequency * 360) + 1.0f) / 2.0f;
+
+    // Apply the tremolo
+    *amplitude = *amplitude * (1.0f - tremolo * tremoloDepth / 15.0f);
+}
+
+void effect_volume_slide(float time, float relTime, float* frequency, float* amplitude, float* phase, uint8_t param) {
+    // This effect slides the volume of the note.
+    // If upper nibble is 0
F438
, lower nibble is slide down speed (1s / value)
+    // If lower nibble is 0, upper nibble is slide up speed (1s / value)
+    // relTime is the relative time of when the effect started
+
+    (void)time;
+    (void)frequency;
+    (void)phase;
+
+    uint8_t slideUpSpeed = (param & 0xF0) >> 4;
+    uint8_t slideDownSpeed = param & 0x0F;
+
+    float newAmplitude = *amplitude;
+
+    if (slideUpSpeed == 0) {
+        // Slide down
+        newAmplitude = 1.0f - (relTime / (1.0f / slideDownSpeed));
+    } else if (slideDownSpeed == 0) {
+        // Slide up
+        newAmplitude = relTime / (1.0f / slideUpSpeed);
+    }
+
+    // Clamp the amplitude
+    // TODO: We should probably override the amplitude, and disable this effect if event volume is set in tracker?
+    *amplitude *= fminf(fmaxf(newAmplitude, 0.0f), 1.0f);
+}
diff --git a/firmware/keira/src/apps/liltracker/effects.h b/firmware/keira/src/apps/liltracker/effects.h
@@ -0,0 +1,61 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef enum {
+    EFFECT_TYPE_NONE,
+    EFFECT_TYPE_ARPEGGIO, // NES: 00xy
+    EFFECT_TYPE_VIBRATO, // NES: 04xy
+    EFFECT_TYPE_TREMOLO, // NES: 07xy
+    EFFECT_TYPE_VOLUME_SLIDE, // NES: 0Axy
+    EFFECT_TYPE_COUNT,
+} effect_type_t;
+
+const effect_type_t effects[EFFECT_TYPE_COUNT] = {
+    EFFECT_TYPE_NONE,
+    EFFECT_TYPE_ARPEGGIO,
+    EFFECT_TYPE_VIBRATO,
+    EFFECT_TYPE_TREMOLO,
+    EFFECT_TYPE_VOLUME_SLIDE,
+};
+
+const char effect_signs[EFFECT_TYPE_COUNT] = {
+    '.',
+    'A',
+    'V',
+    'T',
+    'S',
+};
+
+typedef struct {
+    effect_type_t type;
+    uint8_t param;
+} effect_t;
+
+typedef void (*effect_fn_t)(
+    const float time, const float relTime, float* frequency, float* amplitude, float* phase, uint8_t param
+);
+
+void effect_none(
+    const float time, const float relTime, float* frequency, float* amplitude, float* phase, uint8_t param
+);
+void effect_arpeggio(
+    const float time, const float relTime, float* frequency, float* amplitude, float* phase, uint8_t param
+);
+void effect_vibrato(
+    const float time, const float relTime, float* frequency, float* amplitude, float* phase, uint8_t param
+);
+void effect_tremolo(
+    const float time, const float relTime, float* frequency, float* amplitude, float* phase, uint8_t param
+);
+void effect_volume_slide(
+    const float time, const float relTime, float* frequency, float* amplitude, float* phase, uint8_t param
+);
+
+const effect_fn_t effect_functions[EFFECT_TYPE_COUNT] = {
+    effect_none,
+    effect_arpeggio,
+    effect_vibrato,
+    effect_tremolo,
+    effect_volume_slide,
+};