add game music (very rudimentary and hacky)

src/game/game.c

@@ -8,8 +8,10 @@
 #include <time.h>
 
 #include "../main.h"
+#include "../window/audio.h"
 #include "../window/colour8.h"
 #include "./tetromino/shapes.h"
+#include "SDL_audio.h"
 #include "tetromino/placing.h"
 
 
@@ -60,6 +62,11 @@ void game_init(GameData* const game_data) {
     game_data->curr_idx = -1;                 // set the current index to the max so it becomes zero after increasement
     next_shape(game_data);                    // select the next shape (shuffle should not be triggered)
     shuffle(TETROMINO_COUNT, game_data->nxt); // manually trigger a shuffle
+
+    // initialize audio
+    game_data->audio_device = audio_device_init(32000, AUDIO_S16, 1, 4096);
+    game_data->music = audio_load_wav(game_data->audio_device, "korobeiniki.wav");
+    audio_play(game_data->audio_device, game_data->music);
 }
 
 // called every time the game's state is updated

src/game/game.h

@@ -2,6 +2,7 @@
 
 #include <stdint.h>
 
+#include "../window/audio.h"
 #include "../window/colour8.h"
 #include "tetromino/shapes.h"
 
@@ -14,6 +15,8 @@ typedef Colour8* Row;
 
 typedef struct {
     Row rows[ROWS];
+    AudioDevice const* audio_device;
+    AudioData music;
     uint16_t score;
     ShapeId nxt[7];   // the order of the shape ids that they should appear in
     uint8_t curr_idx; // current shape index