basic sounds

src/draw.c

@@ -737,3 +737,4 @@ void redraw_buffer(SDL_Renderer * ren) {
     /*}*/
 
 }
+

src/main.c

@@ -36,6 +36,81 @@ struct SDL_Window* make_window(void) {
                                        SDL_WINDOW_FULLSCREEN_DESKTOP); 
 }
 
+void callbackfn(void *unused, Uint8 *stream, int len);
+void callbackfn2(void *unused, Uint8 *stream, int len);
+void callbackfn3(void *unused, Uint8 *stream, int len);
+
+
+void start_audio(void) {
+    SDL_AudioSpec fmt = {.freq = 8000, .format = AUDIO_U8,.channels = 1, .samples=512};
+ 
+    fmt.callback = callbackfn3;
+ 
+    if (SDL_OpenAudio(&fmt, NULL) < 0) {
+        fprintf(stderr, "Unable to open audio: %s\n", SDL_GetError());
+        exit(1);
+    }
+    SDL_PauseAudio(0);
+    
+}
+
+void stop_audio(void) {
+    SDL_CloseAudio();
+}
+
+unsigned int func1(int t) {
+    int note = 10;
+    if (!(t % 8000)) {
+        note = (1 + rand()) % 10 + 5;
+        printf("%d %d\n", t, note);
+    }
+    return ((t & 110) % 73 | (t % 1711));
+}
+
+unsigned int func0(int t) {
+    int note = 18;
+    if (t % 1240) {
+        note = (1 + rand()) % 18 + 1;
+    }
+
+    printf("%d %d\n", t, note);
+    fflush(stdout);
+    return (t % note);
+}
+
+
+void callbackfn3(void *unused, Uint8 *stream, int len) {
+    static int t = 1;
+    int i;
+    int yeet = rand();
+    for(i=0; i < len; i++,t++) {
+        stream[i] = func1(t);
+    }
+}
+
+void callbackfn2(void *unused, Uint8 *stream, int len) {
+    static int t = 1;
+    int i;
+    int yeet = rand();
+    for(i=0; i < len; i++,t++) {
+        stream[i] = func0(t);
+    }
+}
+
+
+void callbackfn(void *unused, Uint8 *stream, int len)
+{
+    static int t = 0;
+    int i;
+    int yeet = rand();
+    for( i=0; i < len; i++,t++) {
+    /*
+            stream[i] = (t*5&(t>>7))|(t*3&(t>>8));
+    */
+    //stream[i] = (( t >> 10 ) & 42) * t;
+    stream[i] = (t & yeet) % 73;
+    }
+}
 
 void redraw(struct SDL_Renderer * ren) {
     SDL_RenderClear(ren);
@@ -52,6 +127,7 @@ int physics_loop(void *ptr) {
             // display end level screen
             game_paused = true;
             SDL_Delay(1000);
+            SDL_PauseAudio(1);
             in_game = false;
             SDL_SemWait(resume);
             add_time(level_time);
@@ -63,6 +139,7 @@ int physics_loop(void *ptr) {
             SDL_UnlockMutex(player.physics->lock);
             SDL_Delay(1000);
             game_paused = 0;
+            SDL_PauseAudio(0);
         }
     }
 }
@@ -140,8 +217,9 @@ int game(void) {
 
 int main (int argc, char** argv)  {
 
-    int err = mkdirat(AT_FDCWD, "saves", 0777);
+    mkdirat(AT_FDCWD, "saves", 0777);
 
+    start_audio();
     game();
     SDL_Quit();
     //empty_cleanup_queue();