raylib/examples/audio_music_stream.c

/*******************************************************************************************
*
*   raylib [audio] example - Music playing (streaming)
*
*   NOTE: This example requires OpenAL Soft library installed
*
*   This example has been created using raylib 1.3 (www.raylib.com)
*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
*   Copyright (c) 2015 Ramon Santamaria (@raysan5)
*
********************************************************************************************/

#include "raylib.h"

int main()
{
    // Initialization
    //--------------------------------------------------------------------------------------
    int screenWidth = 800;
    int screenHeight = 450;

    InitWindow(screenWidth, screenHeight, "raylib [audio] example - music playing (streaming)");

    InitAudioDevice();              // Initialize audio device

    Music music = LoadMusicStream("resources/audio/guitar_noodling.ogg");
    
    PlayMusicStream(music);

    int framesCounter = 0;
    float timePlayed = 0.0f;
    //float volume = 1.0;

    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
        //----------------------------------------------------------------------------------
        framesCounter++;

        // Testing music fading from one file to another
/*
        if (framesCounter > 600)    // Wait for 10 seconds (600 frames)
        {
            volume -= 0.01;         // Decrement music volume level

            // When music volume level equal or lower than 0,
            // restore volume level and init another music file
            if (volume <= 0)
            {
                volume = 1.0;
                framesCounter = 0;
            }

            SetMusicVolume(volume);
        }
*/
        timePlayed = GetMusicTimePlayed(music)/GetMusicTimeLength(music)*100*4; // We scale by 4 to fit 400 pixels

        UpdateMusicStream(music);        // Update music buffer with new stream data
        //----------------------------------------------------------------------------------

        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();

            ClearBackground(RAYWHITE);

            DrawText("MUSIC SHOULD BE PLAYING!", 255, 200, 20, LIGHTGRAY);

            DrawRectangle(200, 250, 400, 12, LIGHTGRAY);
            DrawRectangle(200, 250, (int)timePlayed, 12, MAROON);

        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;
}