feat: all filter types

.vscode/settings.json

@@ -64,20 +64,7 @@
         "__string": "cpp",
         "compare": "cpp",
         "concepts": "cpp",
-        "numeric": "cpp",
-        "__tree": "cpp",
-        "any": "cpp",
-        "deque": "cpp",
-        "forward_list": "cpp",
-        "fstream": "cpp",
-        "iomanip": "cpp",
-        "map": "cpp",
-        "shared_mutex": "cpp",
-        "span": "cpp",
-        "stack": "cpp",
-        "valarray": "cpp",
-        "ranges": "cpp",
-        "iostream": "cpp"
+        "numeric": "cpp"
     },
     "FSharp.suggestGitignore": false,
 }

CMakeLists.txt

@@ -17,10 +17,6 @@ FetchContent_Declare(
 
 FetchContent_MakeAvailable(raylib)
 
-# Add nlohmann_json
-# FetchContent_Declare(json URL https://github.com/nlohmann/json/releases/download/v3.11.3/json.tar.xz)
-# FetchContent_MakeAvailable(json)
-
 # Adding our source files
 file(GLOB_RECURSE PROJECT_SOURCES CONFIGURE_DEPENDS "${CMAKE_CURRENT_LIST_DIR}/src/*.cpp") # Define PROJECT_SOURCES as a list of all source files
 set(PROJECT_INCLUDE "${CMAKE_CURRENT_LIST_DIR}/inc/") # Define PROJECT_INCLUDE to be the path to the include directory of the project
@@ -35,7 +31,6 @@ set_target_properties(
 target_sources(${PROJECT_NAME} PRIVATE ${PROJECT_SOURCES})
 target_include_directories(${PROJECT_NAME} PRIVATE ${PROJECT_INCLUDE})
 target_link_libraries(${PROJECT_NAME} PRIVATE raylib)
-# target_link_libraries(${PROJECT_NAME} PRIVATE json)
 
 # Setting ASSETS_PATH
 target_compile_definitions(${PROJECT_NAME} PUBLIC ASSETS_PATH="${CMAKE_CURRENT_SOURCE_DIR}/assets/") # Set the asset path macro to the absolute path on the dev machine

docs/Resources.md

@@ -35,7 +35,4 @@ for (n = 0; n < totalSamples; n++) {
 }
  
 
-We can replace the sin function with any periodic function that returns an amplitude for a given phase angle. Thus, this small piece of code can be used to produce a very wide range of sounds. Functionally, it is the software equivalent of an oscillator, the basic building block of almost all synthesizers.
-
-
-https://ccrma.stanford.edu/software/stk/index.html
+We can replace the sin function with any periodic function that returns an amplitude for a given phase angle. Thus, this small piece of code can be used to produce a very wide range of sounds. Functionally, it is the software equivalent of an oscillator, the basic building block of almost all synthesizers.

inc/Application.h

@@ -23,5 +23,4 @@ class Application {
     Application(/* args */);
     ~Application();
     void Run();
-    void ParsePatch(std::string file_path);
 };

inc/BandPassFilter.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include "Filter.h"
+
+class BandPassFilter : public Filter {
+  protected:
+    float GetSampleForFilterType() override;
+
+  public:
+    BandPassFilter();
+    BandPassFilter(Filter* filter);
+    BandPassFilter(float freq, float res, float q);
+    ~BandPassFilter();
+    bool IsSameFilterType(FilterType type) override { return type == BandPass; };
+};
+
+

inc/Filter.h

@@ -34,39 +34,3 @@ class Filter : public IEffect {
     float GetPeakGain() { return m_drive; }
     virtual bool IsSameFilterType(FilterType type) { return false; };
 };
-
-class BandPassFilter : public Filter {
-  protected:
-    float GetSampleForFilterType() override;
-
-  public:
-    BandPassFilter();
-    BandPassFilter(Filter* filter);
-    BandPassFilter(float freq, float res, float q);
-    ~BandPassFilter();
-    bool IsSameFilterType(FilterType type) override { return type == BandPass; };
-};
-
-class HighPassFilter : public Filter {
-  protected:
-    float GetSampleForFilterType() override;
-
-  public:
-    HighPassFilter();
-    HighPassFilter(Filter* filter);
-    HighPassFilter(float freq, float res, float q);
-    ~HighPassFilter();
-    bool IsSameFilterType(FilterType type) override { return type == HighPass; };
-};
-
-class LowPassFilter : public Filter {
-  protected:
-    float GetSampleForFilterType() override;
-
-  public:
-    LowPassFilter();
-    LowPassFilter(Filter* filter);
-    LowPassFilter(float freq, float res, float q);
-    ~LowPassFilter();
-    bool IsSameFilterType(FilterType type) override { return type == LowPass; };
-};

inc/FilterFactory.h

@@ -1,5 +1,8 @@
 #pragma once
 #include "Filter.h"
+#include "LowPassFilter.h"
+#include "BandPassFilter.h"
+#include "HighPassFilter.h"
 
 struct FilterFactory {
     static Filter* CreateFilter(Filter* old_filter, FilterType new_type) {

inc/HighPassFilter.h

@@ -0,0 +1,14 @@
+#pragma once
+#include "Filter.h"
+
+class HighPassFilter : public Filter {
+  protected:
+    float GetSampleForFilterType() override;
+
+  public:
+    HighPassFilter();
+    HighPassFilter(Filter* filter);
+    HighPassFilter(float freq, float res, float q);
+    ~HighPassFilter();
+    bool IsSameFilterType(FilterType type) override { return type == HighPass; };
+};

inc/LowPassFilter.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "Filter.h"
+
+class LowPassFilter : public Filter {
+  protected:
+    float GetSampleForFilterType() override;
+
+  public:
+    LowPassFilter();
+    LowPassFilter(Filter* filter);
+    LowPassFilter(float freq, float res, float q);
+    ~LowPassFilter();
+    bool IsSameFilterType(FilterType type) override { return type == LowPass; };
+};
+

inc/Oscillator.h

@@ -29,7 +29,6 @@ class Oscillator {
     ~Oscillator();
     OscillatorType GetType() { return m_osc; }
     void SetType(OscillatorType osc);
-    void SetType(std::string const& osc_name);
     float GetVolume() { return m_volume; }
     void SetVolume(float volume) { m_volume = volume; }
     float GetKey() { return m_key; }

inc/Synth.h

@@ -17,7 +17,6 @@ class Synth {
     std::vector<IEffect*> m_effects;
     std::vector<float> m_out_signal;
     LFO* m_lfo;
-    float m_lfo_level;
     void ZeroSignal();
     void GetNote();
     void TriggerNoteOnEffects();
@@ -37,8 +36,5 @@ class Synth {
     const bool& GetIsNoteTriggered() { return is_note_triggered; }
     ADSR* GetADSR() { return (ADSR*)m_effects[0]; }
     Filter* GetFilter() { return (Filter*)m_effects[1]; }
-    LFO* GetLFO() { return m_lfo; }
-    const float& GetLFOLevel() { return m_lfo_level; }
-    void SetLFOLevel(float lvl) { assert(0.f >= lvl <= 1.f); m_lfo_level = lvl; }
     void SetFilter(FilterType type);
 };

inc/SynthGuiState.h

@@ -1,6 +1,6 @@
 #pragma once
 #include "OscillatorType.h"
-#include "raysan/raygui.h"
+#include "raygui.h"
 #include <vector>
 #include "Filter.h"
 

src/Application.cpp

@@ -1,12 +1,7 @@
 #include "Application.h"
 #include "Logger.h"
 #include "Settings.h"
-#include <cmath>    // log10f
-#include <fstream>  // read file
-#include <iostream> // log error
-#include <nlohmann/json.hpp>
 #include <string>
-using json = nlohmann::json;
 
 Application::Application(/* args */) {
     InitSynth();
@@ -99,7 +94,7 @@ void Application::UpdateOnNoteInput() {
         if (!m_synth.GetIsNoteTriggered()) {
             m_synth.Trigger((*m_current_note));
         }
-        // write_log("Note played: %s\n", m_current_note->name.c_str());
+        //write_log("Note played: %s\n", m_current_note->name.c_str());
     } else if (is_note_up() && m_synth.GetIsNoteTriggered()) {
         m_synth.Release();
     }
@@ -123,67 +118,3 @@ void Application::Run() {
         m_renderer.Draw(m_synth, m_synth_gui_state);
     }
 }
-
-void Application::ParsePatch(std::string file_path) {
-    std::ifstream f(file_path);
-    if (!f.is_open()) {
-        std::cerr << "[ERR] failed to open " << file_path << '\n';
-    } else {
-        json data = json::parse(f);
-
-        auto oscillators = m_synth.GetOscillators();
-        for (int i = 0; i < oscillators.size(); i++) {
-            auto osc = oscillators[i];
-            auto gui_osc = m_synth_gui_state.oscillators[i];
-
-            std::string type =
-                data["Oscillators"][i]["Wave"].template get<std::string>();
-            float fine = data["Oscillators"][i]["Tune"].template get<float>();
-            float volume =
-                data["Oscillators"][i]["Volume"].template get<float>();
-
-            osc->SetType(type);
-            osc->SetFine(fine);
-            osc->SetVolume(volume);
-
-            gui_osc->waveshape = osc->GetType();
-            gui_osc->fine = fine;
-            gui_osc->volume = volume;
-        }
-
-        auto adsr = m_synth.GetADSR();
-        auto gui_adsr = m_synth_gui_state.adsr;
-
-        auto adsr_params = data["ADSR"];
-        float attack = adsr_params["Attack"].template get<float>();
-        float decay = adsr_params["Decay"].template get<float>();
-        float sustain = adsr_params["Sustain"].template get<float>();
-        float release = adsr_params["Release"].template get<float>();
-
-        adsr->SetParameters(attack, decay, sustain, release);
-        gui_adsr.attack = attack;
-        gui_adsr.decay = decay;
-        gui_adsr.sustain = sustain;
-        gui_adsr.release = release;
-
-        auto lfo = m_synth.GetLFO();
-        lfo->SetFreq(data["LFO"]["Freq"].template get<float>());
-        m_synth.SetLFOLevel(data["LFO"]["Level"].template get<float>());
-
-        auto filter_type =
-            (FilterType)data["Filter"]["Type"].template get<int>();
-        m_synth.SetFilter(filter_type);
-
-        auto filter = m_synth.GetFilter();
-        auto gui_filter = m_synth_gui_state.filter;
-
-        float filter_freq =
-            std::log10f(data["Filter"]["Cutoff"].template get<float>());
-        float filter_res = data["Filter"]["Res"].template get<float>();
-        float filter_drive = data["Filter"]["Drive"].template get<float>();
-        
-        filter->SetParameters(filter_freq, filter_res, filter_drive);
-        gui_filter.freq = filter_freq;
-        gui_filter.type = filter_type;
-    }
-}

src/BandPassFilter.cpp

@@ -1,4 +1,4 @@
-#include "Filter.h"
+#include "BandPassFilter.h"
 #include "Settings.h"
 
 BandPassFilter::BandPassFilter() {

src/HighPassFilter.cpp

@@ -1,4 +1,4 @@
-#include "Filter.h"
+#include "HighPassFilter.h"
 #include "Settings.h"
 
 HighPassFilter::HighPassFilter() {

src/LowPassFilter.cpp

@@ -1,4 +1,4 @@
-#include "Filter.h"
+#include "LowPassFilter.h"
 #include "Settings.h"
 
 LowPassFilter::LowPassFilter() {

src/Oscillator.cpp

@@ -43,19 +43,6 @@ void Oscillator::SetType(OscillatorType osc) {
     }
 }
 
-void Oscillator::SetType(std::string const& osc_name) {
-    if (osc_name == "Sine")
-        m_osc = Sine;
-    else if (osc_name == "Triangle")
-        m_osc = Triangle;
-    else if (osc_name == "Saw")
-        m_osc = Saw;
-    else if (osc_name == "Square")
-        m_osc = Square;
-    
-    SetType(m_osc);
-}
-
 void Oscillator::SetKey(float key) {
     m_key = key;
     float freq = KeyBoard::GetHzBySemitone(m_key + m_fine);

src/Renderer.cpp

@@ -7,7 +7,7 @@
 #pragma clang diagnostic ignored "-Wunused-but-set-variable"
 #pragma clang diagnostic ignored "-Wunused-variable"
 #pragma clang diagnostic ignored "-Wdeprecated-declarations"
-#include "raysan/raygui.h"
+#include "raygui.h"
 #pragma clang diagnostic pop
 
 Renderer::Renderer(/* args */) {

src/SeeSynth.cpp

@@ -1,57 +1,7 @@
 #include "Application.h"
-#include <string_view>
-#include <vector>
-#include <string>
-#include <iostream>
-
-inline bool file_exists(const std::string& name) {
-    if (FILE *file = fopen(name.c_str(), "r")) {
-        fclose(file);
-        return true;
-    } else {
-        return false;
-    }   
-}
-
-[[noreturn]] void print_help(char* const executable) {
-    std::cout << executable << " [options]\n" <<
-      "Options:\n" <<
-      "  -h | --help        Print this help\n" <<
-      "  -p | --patch       Path to a json file with a patch to apply\n" << 
-      "  -v | --version     Print a program version" << std::endl;
-    std::exit(0);
-}
-
-int main(int argc, char* argv[]) {
-    if (argc > 32) {
-        throw std::runtime_error("Too many input parameters!");
-    }
-
-    std::string patch_file_path;
-    for (int i = 0; i < argc; i++) {
-        auto arg = std::string(argv[i]);
-        if (arg == "-p" || arg == "--patch") {
-            patch_file_path = std::string(argv[i+1]);
-            if (patch_file_path.empty()) {
-                std::cerr << "no file path provided\n";
-                print_help(argv[0]);
-            }
-            else if (!file_exists(patch_file_path)) {
-                std::cerr << patch_file_path << ": no such file\n";
-                print_help(argv[0]);
-            }
-        }   
-        else if (arg == "-h" || arg == "--help") {
-            print_help(argv[0]);
-        }
-    }
 
+int main() {
     Application* app = new Application();
-    
-    if (!patch_file_path.empty()) {
-        app->ParsePatch(patch_file_path);
-    }
-
     app->Run();
 
     delete app;

src/Synth.cpp

@@ -4,10 +4,11 @@
 #include "Logger.h"
 #include "OscillatorType.h"
 #include "Settings.h"
+#include "LowPassFilter.h"
 
 Synth::Synth(/* args */) {
     m_lfo = new LFO();
-    m_lfo->SetFreq(2.0);
+    m_lfo->SetFreq(5.0);
     AddOscillator();
     AddOscillator();
     AddEffect(new ADSR());
@@ -79,7 +80,7 @@ void Synth::ApplyFilterLfo() {
     float dt = m_lfo->Process();
     Filter* filter = (Filter*)m_effects[1];
     float freq = filter->GetFreq();
-    filter->SetParameters(freq + dt*0.5f, filter->GetRes(), filter->GetPeakGain());
+    filter->SetParameters(freq + dt, filter->GetRes(), filter->GetPeakGain());
 }
 
 void Synth::Process() {