Separate engine and game

engine/libs/raylib-4.5.0/examples/audio/audio_mixed_processor.c

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+/*******************************************************************************************
+*
+*   raylib [audio] example - Mixed audio processing
+*
+*   Example originally created with raylib 4.2, last time updated with raylib 4.2
+*
+*   Example contributed by hkc (@hatkidchan) and reviewed by Ramon Santamaria (@raysan5)
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2023 hkc (@hatkidchan)
+*
+********************************************************************************************/
+#include "raylib.h"
+#include <math.h>
+
+static float exponent = 1.0f;                 // Audio exponentiation value
+static float averageVolume[400] = { 0.0f };   // Average volume history
+
+//------------------------------------------------------------------------------------
+// Audio processing function
+//------------------------------------------------------------------------------------
+void ProcessAudio(void *buffer, unsigned int frames)
+{
+    float *samples = (float *)buffer;   // Samples internally stored as <float>s
+    float average = 0.0f;               // Temporary average volume
+
+    for (unsigned int frame = 0; frame < frames; frame++)
+    {
+        float *left = &samples[frame * 2 + 0], *right = &samples[frame * 2 + 1];
+
+        *left = powf(fabsf(*left), exponent) * ( (*left < 0.0f)? -1.0f : 1.0f );
+        *right = powf(fabsf(*right), exponent) * ( (*right < 0.0f)? -1.0f : 1.0f );
+
+        average += fabsf(*left) / frames;   // accumulating average volume
+        average += fabsf(*right) / frames;
+    }
+
+    // Moving history to the left
+    for (int i = 0; i < 399; i++) averageVolume[i] = averageVolume[i + 1];
+
+    averageVolume[399] = average;         // Adding last average value
+}
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [audio] example - processing mixed output");
+
+    InitAudioDevice();              // Initialize audio device
+
+    AttachAudioMixedProcessor(ProcessAudio);
+
+    Music music = LoadMusicStream("resources/country.mp3");
+    Sound sound = LoadSound("resources/coin.wav");
+
+    PlayMusicStream(music);
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        UpdateMusicStream(music);   // Update music buffer with new stream data
+
+        // Modify processing variables
+        //----------------------------------------------------------------------------------
+        if (IsKeyPressed(KEY_LEFT)) exponent -= 0.05f;
+        if (IsKeyPressed(KEY_RIGHT)) exponent += 0.05f;
+
+        if (exponent <= 0.5f) exponent = 0.5f;
+        if (exponent >= 3.0f) exponent = 3.0f;
+
+        if (IsKeyPressed(KEY_SPACE)) PlaySound(sound);
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            DrawText("MUSIC SHOULD BE PLAYING!", 255, 150, 20, LIGHTGRAY);
+
+            DrawText(TextFormat("EXPONENT = %.2f", exponent), 215, 180, 20, LIGHTGRAY);
+
+            DrawRectangle(199, 199, 402, 34, LIGHTGRAY);
+            for (int i = 0; i < 400; i++)
+            {
+                DrawLine(201 + i, 232 - averageVolume[i] * 32, 201 + i, 232, MAROON);
+            }
+            DrawRectangleLines(199, 199, 402, 34, GRAY);
+
+            DrawText("PRESS SPACE TO PLAY OTHER SOUND", 200, 250, 20, LIGHTGRAY);
+            DrawText("USE LEFT AND RIGHT ARROWS TO ALTER DISTORTION", 140, 280, 20, LIGHTGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadMusicStream(music);   // Unload music stream buffers from RAM
+
+    DetachAudioMixedProcessor(ProcessAudio);  // Disconnect audio processor
+
+    CloseAudioDevice();         // Close audio device (music streaming is automatically stopped)
+
+    CloseWindow();              // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}

engine/libs/raylib-4.5.0/examples/audio/audio_module_playing.c

@@ -0,0 +1,151 @@
+/*******************************************************************************************
+*
+*   raylib [audio] example - Module playing (streaming)
+*
+*   Example originally created with raylib 1.5, last time updated with raylib 3.5
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2016-2023 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define MAX_CIRCLES  64
+
+typedef struct {
+    Vector2 position;
+    float radius;
+    float alpha;
+    float speed;
+    Color color;
+} CircleWave;
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    SetConfigFlags(FLAG_MSAA_4X_HINT);  // NOTE: Try to enable MSAA 4X
+
+    InitWindow(screenWidth, screenHeight, "raylib [audio] example - module playing (streaming)");
+
+    InitAudioDevice();                  // Initialize audio device
+
+    Color colors[14] = { ORANGE, RED, GOLD, LIME, BLUE, VIOLET, BROWN, LIGHTGRAY, PINK,
+                         YELLOW, GREEN, SKYBLUE, PURPLE, BEIGE };
+
+    // Creates some circles for visual effect
+    CircleWave circles[MAX_CIRCLES] = { 0 };
+
+    for (int i = MAX_CIRCLES - 1; i >= 0; i--)
+    {
+        circles[i].alpha = 0.0f;
+        circles[i].radius = (float)GetRandomValue(10, 40);
+        circles[i].position.x = (float)GetRandomValue((int)circles[i].radius, (int)(screenWidth - circles[i].radius));
+        circles[i].position.y = (float)GetRandomValue((int)circles[i].radius, (int)(screenHeight - circles[i].radius));
+        circles[i].speed = (float)GetRandomValue(1, 100)/2000.0f;
+        circles[i].color = colors[GetRandomValue(0, 13)];
+    }
+
+    Music music = LoadMusicStream("resources/mini1111.xm");
+    music.looping = false;
+    float pitch = 1.0f;
+
+    PlayMusicStream(music);
+
+    float timePlayed = 0.0f;
+    bool pause = false;
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        UpdateMusicStream(music);      // Update music buffer with new stream data
+
+        // Restart music playing (stop and play)
+        if (IsKeyPressed(KEY_SPACE))
+        {
+            StopMusicStream(music);
+            PlayMusicStream(music);
+        }
+
+        // Pause/Resume music playing
+        if (IsKeyPressed(KEY_P))
+        {
+            pause = !pause;
+
+            if (pause) PauseMusicStream(music);
+            else ResumeMusicStream(music);
+        }
+
+        if (IsKeyDown(KEY_DOWN)) pitch -= 0.01f;
+        else if (IsKeyDown(KEY_UP)) pitch += 0.01f;
+
+        SetMusicPitch(music, pitch);
+
+        // Get timePlayed scaled to bar dimensions
+        timePlayed = GetMusicTimePlayed(music)/GetMusicTimeLength(music)*(screenWidth - 40);
+
+        // Color circles animation
+        for (int i = MAX_CIRCLES - 1; (i >= 0) && !pause; i--)
+        {
+            circles[i].alpha += circles[i].speed;
+            circles[i].radius += circles[i].speed*10.0f;
+
+            if (circles[i].alpha > 1.0f) circles[i].speed *= -1;
+
+            if (circles[i].alpha <= 0.0f)
+            {
+                circles[i].alpha = 0.0f;
+                circles[i].radius = (float)GetRandomValue(10, 40);
+                circles[i].position.x = (float)GetRandomValue((int)circles[i].radius, (int)(screenWidth - circles[i].radius));
+                circles[i].position.y = (float)GetRandomValue((int)circles[i].radius, (int)(screenHeight - circles[i].radius));
+                circles[i].color = colors[GetRandomValue(0, 13)];
+                circles[i].speed = (float)GetRandomValue(1, 100)/2000.0f;
+            }
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            for (int i = MAX_CIRCLES - 1; i >= 0; i--)
+            {
+                DrawCircleV(circles[i].position, circles[i].radius, Fade(circles[i].color, circles[i].alpha));
+            }
+
+            // Draw time bar
+            DrawRectangle(20, screenHeight - 20 - 12, screenWidth - 40, 12, LIGHTGRAY);
+            DrawRectangle(20, screenHeight - 20 - 12, (int)timePlayed, 12, MAROON);
+            DrawRectangleLines(20, screenHeight - 20 - 12, screenWidth - 40, 12, GRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadMusicStream(music);          // Unload music stream buffers from RAM
+
+    CloseAudioDevice();     // Close audio device (music streaming is automatically stopped)
+
+    CloseWindow();          // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}

engine/libs/raylib-4.5.0/examples/audio/audio_music_stream.c

@@ -0,0 +1,98 @@
+/*******************************************************************************************
+*
+*   raylib [audio] example - Music playing (streaming)
+*
+*   Example originally created with raylib 1.3, last time updated with raylib 4.0
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2015-2023 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [audio] example - music playing (streaming)");
+
+    InitAudioDevice();              // Initialize audio device
+
+    Music music = LoadMusicStream("resources/country.mp3");
+
+    PlayMusicStream(music);
+
+    float timePlayed = 0.0f;        // Time played normalized [0.0f..1.0f]
+    bool pause = false;             // Music playing paused
+
+    SetTargetFPS(30);               // Set our game to run at 30 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        UpdateMusicStream(music);   // Update music buffer with new stream data
+        
+        // Restart music playing (stop and play)
+        if (IsKeyPressed(KEY_SPACE))
+        {
+            StopMusicStream(music);
+            PlayMusicStream(music);
+        }
+
+        // Pause/Resume music playing
+        if (IsKeyPressed(KEY_P))
+        {
+            pause = !pause;
+
+            if (pause) PauseMusicStream(music);
+            else ResumeMusicStream(music);
+        }
+
+        // Get normalized time played for current music stream
+        timePlayed = GetMusicTimePlayed(music)/GetMusicTimeLength(music);
+
+        if (timePlayed > 1.0f) timePlayed = 1.0f;   // Make sure time played is no longer than music
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            DrawText("MUSIC SHOULD BE PLAYING!", 255, 150, 20, LIGHTGRAY);
+
+            DrawRectangle(200, 200, 400, 12, LIGHTGRAY);
+            DrawRectangle(200, 200, (int)(timePlayed*400.0f), 12, MAROON);
+            DrawRectangleLines(200, 200, 400, 12, GRAY);
+
+            DrawText("PRESS SPACE TO RESTART MUSIC", 215, 250, 20, LIGHTGRAY);
+            DrawText("PRESS P TO PAUSE/RESUME MUSIC", 208, 280, 20, LIGHTGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadMusicStream(music);   // Unload music stream buffers from RAM
+
+    CloseAudioDevice();         // Close audio device (music streaming is automatically stopped)
+
+    CloseWindow();              // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}

engine/libs/raylib-4.5.0/examples/audio/audio_raw_stream.c

@@ -0,0 +1,215 @@
+/*******************************************************************************************
+*
+*   raylib [audio] example - Raw audio streaming
+*
+*   Example originally created with raylib 1.6, last time updated with raylib 4.2
+*
+*   Example created by Ramon Santamaria (@raysan5) and reviewed by James Hofmann (@triplefox)
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2015-2023 Ramon Santamaria (@raysan5) and James Hofmann (@triplefox)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#include <stdlib.h>         // Required for: malloc(), free()
+#include <math.h>           // Required for: sinf()
+#include <string.h>         // Required for: memcpy()
+
+#define MAX_SAMPLES               512
+#define MAX_SAMPLES_PER_UPDATE   4096
+
+// Cycles per second (hz)
+float frequency = 440.0f;
+
+// Audio frequency, for smoothing
+float audioFrequency = 440.0f;
+
+// Previous value, used to test if sine needs to be rewritten, and to smoothly modulate frequency
+float oldFrequency = 1.0f;
+
+// Index for audio rendering
+float sineIdx = 0.0f;
+
+// Audio input processing callback
+void AudioInputCallback(void *buffer, unsigned int frames)
+{
+    audioFrequency = frequency + (audioFrequency - frequency)*0.95f;
+    audioFrequency += 1.0f;
+    audioFrequency -= 1.0f;
+    float incr = audioFrequency/44100.0f;
+    short *d = (short *)buffer;
+
+    for (unsigned int i = 0; i < frames; i++)
+    {
+        d[i] = (short)(32000.0f*sinf(2*PI*sineIdx));
+        sineIdx += incr;
+        if (sineIdx > 1.0f) sineIdx -= 1.0f;
+    }
+}
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [audio] example - raw audio streaming");
+
+    InitAudioDevice();              // Initialize audio device
+
+    SetAudioStreamBufferSizeDefault(MAX_SAMPLES_PER_UPDATE);
+
+    // Init raw audio stream (sample rate: 44100, sample size: 16bit-short, channels: 1-mono)
+    AudioStream stream = LoadAudioStream(44100, 16, 1);
+
+    SetAudioStreamCallback(stream, AudioInputCallback);
+
+    // Buffer for the single cycle waveform we are synthesizing
+    short *data = (short *)malloc(sizeof(short)*MAX_SAMPLES);
+
+    // Frame buffer, describing the waveform when repeated over the course of a frame
+    short *writeBuf = (short *)malloc(sizeof(short)*MAX_SAMPLES_PER_UPDATE);
+
+    PlayAudioStream(stream);        // Start processing stream buffer (no data loaded currently)
+
+    // Position read in to determine next frequency
+    Vector2 mousePosition = { -100.0f, -100.0f };
+
+    /*
+    // Cycles per second (hz)
+    float frequency = 440.0f;
+
+    // Previous value, used to test if sine needs to be rewritten, and to smoothly modulate frequency
+    float oldFrequency = 1.0f;
+
+    // Cursor to read and copy the samples of the sine wave buffer
+    int readCursor = 0;
+    */
+
+    // Computed size in samples of the sine wave
+    int waveLength = 1;
+
+    Vector2 position = { 0, 0 };
+
+    SetTargetFPS(30);               // Set our game to run at 30 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+
+        // Sample mouse input.
+        mousePosition = GetMousePosition();
+
+        if (IsMouseButtonDown(MOUSE_BUTTON_LEFT))
+        {
+            float fp = (float)(mousePosition.y);
+            frequency = 40.0f + (float)(fp);
+
+            float pan = (float)(mousePosition.x) / (float)screenWidth;
+            SetAudioStreamPan(stream, pan);
+        }
+
+        // Rewrite the sine wave
+        // Compute two cycles to allow the buffer padding, simplifying any modulation, resampling, etc.
+        if (frequency != oldFrequency)
+        {
+            // Compute wavelength. Limit size in both directions.
+            //int oldWavelength = waveLength;
+            waveLength = (int)(22050/frequency);
+            if (waveLength > MAX_SAMPLES/2) waveLength = MAX_SAMPLES/2;
+            if (waveLength < 1) waveLength = 1;
+
+            // Write sine wave
+            for (int i = 0; i < waveLength*2; i++)
+            {
+                data[i] = (short)(sinf(((2*PI*(float)i/waveLength)))*32000);
+            }
+            // Make sure the rest of the line is flat
+            for (int j = waveLength*2; j < MAX_SAMPLES; j++)
+            {
+                data[j] = (short)0;
+            }
+
+            // Scale read cursor's position to minimize transition artifacts
+            //readCursor = (int)(readCursor * ((float)waveLength / (float)oldWavelength));
+            oldFrequency = frequency;
+        }
+
+        /*
+        // Refill audio stream if required
+        if (IsAudioStreamProcessed(stream))
+        {
+            // Synthesize a buffer that is exactly the requested size
+            int writeCursor = 0;
+
+            while (writeCursor < MAX_SAMPLES_PER_UPDATE)
+            {
+                // Start by trying to write the whole chunk at once
+                int writeLength = MAX_SAMPLES_PER_UPDATE-writeCursor;
+
+                // Limit to the maximum readable size
+                int readLength = waveLength-readCursor;
+
+                if (writeLength > readLength) writeLength = readLength;
+
+                // Write the slice
+                memcpy(writeBuf + writeCursor, data + readCursor, writeLength*sizeof(short));
+
+                // Update cursors and loop audio
+                readCursor = (readCursor + writeLength) % waveLength;
+
+                writeCursor += writeLength;
+            }
+
+            // Copy finished frame to audio stream
+            UpdateAudioStream(stream, writeBuf, MAX_SAMPLES_PER_UPDATE);
+        }
+        */
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            DrawText(TextFormat("sine frequency: %i",(int)frequency), GetScreenWidth() - 220, 10, 20, RED);
+            DrawText("click mouse button to change frequency or pan", 10, 10, 20, DARKGRAY);
+
+            // Draw the current buffer state proportionate to the screen
+            for (int i = 0; i < screenWidth; i++)
+            {
+                position.x = (float)i;
+                position.y = 250 + 50*data[i*MAX_SAMPLES/screenWidth]/32000.0f;
+
+                DrawPixelV(position, RED);
+            }
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    free(data);                 // Unload sine wave data
+    free(writeBuf);             // Unload write buffer
+
+    UnloadAudioStream(stream);   // Close raw audio stream and delete buffers from RAM
+    CloseAudioDevice();         // Close audio device (music streaming is automatically stopped)
+
+    CloseWindow();              // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}

engine/libs/raylib-4.5.0/examples/audio/audio_sound_loading.c

@@ -0,0 +1,69 @@
+/*******************************************************************************************
+*
+*   raylib [audio] example - Sound loading and playing
+*
+*   Example originally created with raylib 1.1, last time updated with raylib 3.5
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2014-2023 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [audio] example - sound loading and playing");
+
+    InitAudioDevice();      // Initialize audio device
+
+    Sound fxWav = LoadSound("resources/sound.wav");         // Load WAV audio file
+    Sound fxOgg = LoadSound("resources/target.ogg");        // Load OGG audio file
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (IsKeyPressed(KEY_SPACE)) PlaySound(fxWav);      // Play WAV sound
+        if (IsKeyPressed(KEY_ENTER)) PlaySound(fxOgg);      // Play OGG sound
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            DrawText("Press SPACE to PLAY the WAV sound!", 200, 180, 20, LIGHTGRAY);
+            DrawText("Press ENTER to PLAY the OGG sound!", 200, 220, 20, LIGHTGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadSound(fxWav);     // Unload sound data
+    UnloadSound(fxOgg);     // Unload sound data
+
+    CloseAudioDevice();     // Close audio device
+
+    CloseWindow();          // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}

engine/libs/raylib-4.5.0/examples/audio/audio_stream_effects.c

@@ -0,0 +1,179 @@
+/*******************************************************************************************
+*
+*   raylib [audio] example - Music stream processing effects
+*
+*   Example originally created with raylib 4.2, last time updated with raylib 4.2
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2022-2023 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#include <stdlib.h>         // Required for: NULL
+
+// Required delay effect variables
+static float *delayBuffer = NULL;
+static unsigned int delayBufferSize = 0;
+static unsigned int delayReadIndex = 2;
+static unsigned int delayWriteIndex = 0;
+
+//------------------------------------------------------------------------------------
+// Module Functions Declaration
+//------------------------------------------------------------------------------------
+static void AudioProcessEffectLPF(void *buffer, unsigned int frames);   // Audio effect: lowpass filter
+static void AudioProcessEffectDelay(void *buffer, unsigned int frames); // Audio effect: delay
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [audio] example - stream effects");
+
+    InitAudioDevice();              // Initialize audio device
+
+    Music music = LoadMusicStream("resources/country.mp3");
+
+    // Allocate buffer for the delay effect
+    delayBufferSize = 48000*2;      // 1 second delay (device sampleRate*channels)
+    delayBuffer = (float *)RL_CALLOC(delayBufferSize, sizeof(float));
+
+    PlayMusicStream(music);
+
+    float timePlayed = 0.0f;        // Time played normalized [0.0f..1.0f]
+    bool pause = false;             // Music playing paused
+    
+    bool enableEffectLPF = false;   // Enable effect low-pass-filter
+    bool enableEffectDelay = false; // Enable effect delay (1 second)
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        UpdateMusicStream(music);   // Update music buffer with new stream data
+
+        // Restart music playing (stop and play)
+        if (IsKeyPressed(KEY_SPACE))
+        {
+            StopMusicStream(music);
+            PlayMusicStream(music);
+        }
+
+        // Pause/Resume music playing
+        if (IsKeyPressed(KEY_P))
+        {
+            pause = !pause;
+
+            if (pause) PauseMusicStream(music);
+            else ResumeMusicStream(music);
+        }
+
+        // Add/Remove effect: lowpass filter
+        if (IsKeyPressed(KEY_F))
+        {
+            enableEffectLPF = !enableEffectLPF;
+            if (enableEffectLPF) AttachAudioStreamProcessor(music.stream, AudioProcessEffectLPF);
+            else DetachAudioStreamProcessor(music.stream, AudioProcessEffectLPF);
+        }
+
+        // Add/Remove effect: delay
+        if (IsKeyPressed(KEY_D))
+        {
+            enableEffectDelay = !enableEffectDelay;
+            if (enableEffectDelay) AttachAudioStreamProcessor(music.stream, AudioProcessEffectDelay);
+            else DetachAudioStreamProcessor(music.stream, AudioProcessEffectDelay);
+        }
+        
+        // Get normalized time played for current music stream
+        timePlayed = GetMusicTimePlayed(music)/GetMusicTimeLength(music);
+
+        if (timePlayed > 1.0f) timePlayed = 1.0f;   // Make sure time played is no longer than music
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            DrawText("MUSIC SHOULD BE PLAYING!", 245, 150, 20, LIGHTGRAY);
+
+            DrawRectangle(200, 180, 400, 12, LIGHTGRAY);
+            DrawRectangle(200, 180, (int)(timePlayed*400.0f), 12, MAROON);
+            DrawRectangleLines(200, 180, 400, 12, GRAY);
+
+            DrawText("PRESS SPACE TO RESTART MUSIC", 215, 230, 20, LIGHTGRAY);
+            DrawText("PRESS P TO PAUSE/RESUME MUSIC", 208, 260, 20, LIGHTGRAY);
+            
+            DrawText(TextFormat("PRESS F TO TOGGLE LPF EFFECT: %s", enableEffectLPF? "ON" : "OFF"), 200, 320, 20, GRAY);
+            DrawText(TextFormat("PRESS D TO TOGGLE DELAY EFFECT: %s", enableEffectDelay? "ON" : "OFF"), 180, 350, 20, GRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadMusicStream(music);   // Unload music stream buffers from RAM
+
+    CloseAudioDevice();         // Close audio device (music streaming is automatically stopped)
+
+    RL_FREE(delayBuffer);       // Free delay buffer
+
+    CloseWindow();              // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
+
+//------------------------------------------------------------------------------------
+// Module Functions Definition
+//------------------------------------------------------------------------------------
+// Audio effect: lowpass filter
+static void AudioProcessEffectLPF(void *buffer, unsigned int frames)
+{
+    static float low[2] = { 0.0f, 0.0f };
+    static const float cutoff = 70.0f / 44100.0f; // 70 Hz lowpass filter
+    const float k = cutoff / (cutoff + 0.1591549431f); // RC filter formula
+
+    for (unsigned int i = 0; i < frames*2; i += 2)
+    {
+        float l = ((float *)buffer)[i], r = ((float *)buffer)[i + 1];
+        low[0] += k * (l - low[0]);
+        low[1] += k * (r - low[1]);
+        ((float *)buffer)[i] = low[0];
+        ((float *)buffer)[i + 1] = low[1];
+    }
+}
+
+// Audio effect: delay
+static void AudioProcessEffectDelay(void *buffer, unsigned int frames)
+{
+    for (unsigned int i = 0; i < frames*2; i += 2)
+    {
+        float leftDelay = delayBuffer[delayReadIndex++];    // ERROR: Reading buffer -> WHY??? Maybe thread related???
+        float rightDelay = delayBuffer[delayReadIndex++];
+
+        if (delayReadIndex == delayBufferSize) delayReadIndex = 0;
+
+        ((float *)buffer)[i] = 0.5f*((float *)buffer)[i] + 0.5f*leftDelay;
+        ((float *)buffer)[i + 1] = 0.5f*((float *)buffer)[i + 1] + 0.5f*rightDelay;
+
+        delayBuffer[delayWriteIndex++] = ((float *)buffer)[i];
+        delayBuffer[delayWriteIndex++] = ((float *)buffer)[i + 1];
+        if (delayWriteIndex == delayBufferSize) delayWriteIndex = 0;
+    }
+}

engine/libs/raylib-4.5.0/examples/audio/resources/LICENSE.md

@@ -0,0 +1,10 @@
+| resource             | author      | licence | notes |
+| :------------------- | :---------: | :------ | :---- |
+| country.mp3          | [@emegeme](https://github.com/emegeme) | [CC0](https://creativecommons.org/publicdomain/zero/1.0/) | Originally created for "DART that TARGET" game |
+| target.ogg           | [@emegeme](https://github.com/emegeme) | [CC0](https://creativecommons.org/publicdomain/zero/1.0/) | Originally created for "DART that TARGET" game |
+| target.flac          | [@emegeme](https://github.com/emegeme) | [CC0](https://creativecommons.org/publicdomain/zero/1.0/) | Originally created for "DART that TARGET" game |
+| coin.wav             | [@raysan5](https://github.com/raysan5) | [CC0](https://creativecommons.org/publicdomain/zero/1.0/) | Made with [rFXGen](https://raylibtech.itch.io/rfxgen) |
+| sound.wav            | [@raysan5](https://github.com/raysan5) | [CC0](https://creativecommons.org/publicdomain/zero/1.0/) | Made with [rFXGen](https://raylibtech.itch.io/rfxgen) |
+| spring.wav           | [@raysan5](https://github.com/raysan5) | [CC0](https://creativecommons.org/publicdomain/zero/1.0/) | Made with [rFXGen](https://raylibtech.itch.io/rfxgen) |
+| weird.wav            | [@raysan5](https://github.com/raysan5) | [CC0](https://creativecommons.org/publicdomain/zero/1.0/) | Made with [rFXGen](https://raylibtech.itch.io/rfxgen) |
+| mini1111.xm          | [tPORt](https://modarchive.org/index.php?request=view_by_moduleid&query=51891) | [Mod Archive Distribution license](https://modarchive.org/index.php?terms-upload) | - |