Update audio_music_stream.c

Author: raysan5

examples/audio/audio_music_stream.c

@@ -35,6 +35,12 @@ int main(void)
 
     float timePlayed = 0.0f;        // Time played normalized [0.0f..1.0f]
     bool pause = false;             // Music playing paused
+    
+    float pan = 0.0f;               // Default audio pan center [-1.0f..1.0f]
+    SetMusicPan(music, pan);
+    
+    float volume = 0.8f;            // Default audio volume [0.0f..1.0f]
+    SetMusicVolume(music, volume);
 
     SetTargetFPS(30);               // Set our game to run at 30 frames-per-second
     //--------------------------------------------------------------------------------------
@@ -61,6 +67,34 @@ int main(void)
             if (pause) PauseMusicStream(music);
             else ResumeMusicStream(music);
         }
+        
+        // Set audio pan
+        if (IsKeyDown(KEY_LEFT)) 
+        {
+            pan -= 0.05f;
+            if (pan < -1.0f) pan = -1.0f;
+            SetMusicPan(music, pan);
+        }
+        else if (IsKeyDown(KEY_RIGHT)) 
+        {
+            pan += 0.05f;
+            if (pan > 1.0f) pan = 1.0f;
+            SetMusicPan(music, pan);
+        }
+        
+        // Set audio volume
+        if (IsKeyDown(KEY_DOWN)) 
+        {
+            volume -= 0.05f;
+            if (volume < 0.0f) volume = 0.0f;
+            SetMusicVolume(music, volume);
+        }
+        else if (IsKeyDown(KEY_UP)) 
+        {
+            volume += 0.05f;
+            if (volume > 1.0f) volume = 1.0f;
+            SetMusicVolume(music, volume);
+        }
 
         // Get normalized time played for current music stream
         timePlayed = GetMusicTimePlayed(music)/GetMusicTimeLength(music);
@@ -75,13 +109,23 @@ int main(void)
             ClearBackground(RAYWHITE);
 
             DrawText("MUSIC SHOULD BE PLAYING!", 255, 150, 20, LIGHTGRAY);
+            
+            DrawText("LEFT-RIGHT for PAN CONTROL", 320, 74, 10, DARKBLUE);
+            DrawRectangle(300, 100, 200, 12, LIGHTGRAY);
+            DrawRectangleLines(300, 100, 200, 12, GRAY);
+            DrawRectangle(300 + (pan + 1.0)/2.0f*200 - 5, 92, 10, 28, DARKGRAY);
 
             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);
+            
+            DrawText("UP-DOWN for VOLUME CONTROL", 320, 334, 10, DARKGREEN);
+            DrawRectangle(300, 360, 200, 12, LIGHTGRAY);
+            DrawRectangleLines(300, 360, 200, 12, GRAY);
+            DrawRectangle(300 + volume*200 - 5, 352, 10, 28, DARKGRAY);
 
         EndDrawing();
         //----------------------------------------------------------------------------------