自学教程：C++ sound_play函数代码示例

void ui_check_who_won(){	char *line, *who_str = NULL;	int who, len;	if (!move_fout)		return;	fprintf (move_fout, "WHO_WON /n");	fflush (move_fout);	line = line_read(move_fin);	if (g_strncasecmp(line, "ACK", 3))	{		// NAK ==> not implemented		ui_gameover = FALSE;		sb_set_score ("");		return;	}	line += 4;	line = g_strstrip(line);	who_str = line;	while(!isspace(*line) && *line) line++;	while(isspace(*line)) line++;	sb_set_score (line);	if (!g_strncasecmp(who_str, "NYET", 4))	{		ui_gameover = FALSE;		return;	}	ui_stopped = TRUE;	ui_gameover = TRUE;	if (opt_logfile)		fprintf(opt_logfile, "RESULT: %s/n", who_str);	if (!state_gui_active)		ui_cleanup();	sb_update ();	if (game_single_player && !ui_cheated && !g_strncasecmp(who_str, "WON", 3))	{		gboolean retval;		retval = prefs_add_highscore (line, sb_get_human_time ());		if (retval)			sound_play (SOUND_HIGHSCORE);		else 			sound_play (SOUND_WON);		if (game_levels)		{			GameLevel *next_level = game_levels;			while (next_level->name)			{				if (next_level->game == opt_game)					break;				next_level++;			}			next_level++;			if (next_level->name)				menu_put_level (next_level->name);		}	}	if (game_single_player && !ui_cheated && !g_strncasecmp(who_str, "LOST", 4))		sound_play (SOUND_LOST);}

void player_equip_item(u16 inv_slot){    PLAYER_EQUIPPED_ITEM = inv_slot;    //TODO: Do these transfer to Indy?    if(tile_metadata[player_inventory[PLAYER_EQUIPPED_ITEM]] & TILE_LIGHTSABER)        sound_play(0x1F);    else if(tile_metadata[player_inventory[PLAYER_EQUIPPED_ITEM]] & TILE_LIGHT_BLASTER || tile_metadata[player_inventory[PLAYER_EQUIPPED_ITEM]] & TILE_HEAVY_BLASTER)        sound_play(0x20);    else if(tile_metadata[player_inventory[PLAYER_EQUIPPED_ITEM]] & TILE_THE_FORCE)        sound_play(0x34);}

voidplayer_step(Player *P, int key_left, int key_right, int key_jump){    Collision C = {0};    // Left & right.    int dx = 0;    if (key_right) {        dx = +1;    }    if (key_left)  {        dx = -1;    }    scene_entity_move_x(&GAME->scene, P->E, dx * 2, &C);    // Jump & fall.    static int PLAYER_JUMP[] = { 5, 4, 3, 2, 2, 1, 1, 1 };    if (key_jump && P->grounded) {        P->jump = 1;        sound_play(&GAME->sound_jump);    }    if (!P->jump) {        P->fall = minimum(P->fall + 1, 16);        if (!scene_entity_move_y(&GAME->scene, P->E, P->fall, &C)) {            if (!P->grounded) {                sound_play(&GAME->sound_land);                P->grounded = 1;            }            P->fall = 2;        } else {            P->grounded = 0;        }    } else {        P->grounded = 0;        P->jump++;        if (P->jump >= array_count(PLAYER_JUMP) ||                scene_entity_move_y(&GAME->scene, P->E, -(PLAYER_JUMP[P->jump - 1] * 2), &C) == false)        {            P->jump = 0;        }    }    // Draw the player.    rect_draw_push(P->E->box, 2, 10);}

void update(objectmachine_t *obj, player_t **team, int team_size, brick_list_t *brick_list, item_list_t *item_list, object_list_t *object_list){    objectdecorator_t *dec = (objectdecorator_t*)obj;    objectdecorator_enemy_t *me = (objectdecorator_enemy_t*)obj;    objectmachine_t *decorated_machine = dec->decorated_machine;    object_t *object = obj->get_object_instance(obj);    int i, score;    score = (int)expression_evaluate(me->score);    /* player x object collision */    for(i=0; i<team_size; i++) {        player_t *player = team[i];        if(actor_pixelperfect_collision(object->actor, player->actor)) {            if(player_is_attacking(player) || player->invincible) {                /* I've been defeated */                player_bounce(player, object->actor);                level_add_to_score(score);                level_create_item(IT_EXPLOSION, v2d_add(object->actor->position, v2d_new(0,-15)));                level_create_animal(object->actor->position);                sound_play( soundfactory_get("destroy") );                object->state = ES_DEAD;            }            else {                /* The player has been hit by me */                player_hit(player, object->actor);            }        }    }    decorated_machine->update(decorated_machine, team, team_size, brick_list, item_list, object_list);}

/* misc */void handle_logic(item_t *item, item_t *other, player_t **team, int team_size, void (*stepin)(item_t*,player_t*), void (*stepout)(item_t*)){    int i;    int nobody_is_pressing_me = TRUE;    switch_t *me = (switch_t*)item;    actor_t *act = item->actor;    /* step in */    for(i=0; i<team_size; i++) {        player_t *player = team[i];        if(pressed_the_switch(item, player)) {            nobody_is_pressing_me = FALSE;            if(!me->is_pressed) {                stepin(other, player);                sound_play( soundfactory_get("switch") );                actor_change_animation(act, sprite_get_animation("SD_SWITCH", 1));                me->is_pressed = TRUE;            }        }    }    /* step out */    if(nobody_is_pressing_me) {        if(me->is_pressed) {            stepout(other);            actor_change_animation(act, sprite_get_animation("SD_SWITCH", 0));            me->is_pressed = FALSE;        }    }}

int ui_get_machine_move (){	byte *move;	if (player_to_play == HUMAN || ui_stopped)		return FALSE;	if (!opt_infile)	{		move = move_fread_ack (move_fin);		if (!move)		{			sb_error ("Couldn't make move/n", TRUE);			ui_stopped = TRUE;			sb_update ();			return FALSE;		}		if (opt_logfile)			move_fwrite (move, opt_logfile);	}	else 		// file mode	{		//TODO: should communicate the move to the engine		move = move_fread (opt_infile);		if (opt_logfile)			move_fwrite (move, opt_logfile);	}	board_apply_refresh (move, NULL);	if (!game_single_player)		cur_pos.player = (cur_pos.player == WHITE ? BLACK : WHITE);	cur_pos.num_moves ++;	sound_play (SOUND_MACHINE_MOVE);	ui_check_who_won ();	sb_update ();	ui_send_make_move ();	return FALSE;}

void savesnap(){   sound_stop();   savesnap(-1);   eat();   sound_play();}

VbError_t VbExBeep(uint32_t msec, uint32_t frequency){	int res;        if (frequency) {                res = sound_start(frequency);        } else {                res = sound_stop();	}	if (res > 0) {		// The previous call had an error.		return VBERROR_UNKNOWN;	} else if (res < 0) {		// Non-blocking beeps aren't supported.		if (msec > 0 && sound_play(msec, frequency))			return VBERROR_UNKNOWN;		return VBERROR_NO_BACKGROUND_SOUND;	} else {		// The non-blocking call worked. Delay if requested.		if (msec > 0) {			mdelay(msec);			if (sound_stop())				return VBERROR_UNKNOWN;		}		return VBERROR_SUCCESS;        }}

int game_trans_start_game() {	sound_play(START_BEGIN, START_END);	PLAYER_DRIVE_set_modification(mod_disable_motors_and_servos, 3);	player_lives = GAME_LIVES;	LASER_TAG_set_hit_LED(0);	return 0;}

//poll input for gui2void gui2_poll(){	static u32 old_joy1 = 0;	u32 new_joy1,joy1 = 0;	//hack to make sure key isnt held down	if(joykeys[config.gui_keys[0]])	joy1 |= INPUT_MENU;	if(joykeys[config.gui_keys[1]])	joy1 |= INPUT_LOADSTATE;	if(joykeys[config.gui_keys[2]])	joy1 |= INPUT_SAVESTATE;	if(joykeys[config.gui_keys[4]])	joy1 |= INPUT_SCREENSHOT;	new_joy1 = joy1 & ~old_joy1;	old_joy1 = joy1;	//end hack	if(new_joy1 & INPUT_MENU) {		//dont let user exit gui if rom is not loaded		if((pce == 0) || (pce->rom == 0))			return;		gui_active ^= 1;		memset(gui_draw_getscreen(),GUI_COLOR_OFFSET,gui_draw_getscreenpitch()*gui_draw_getscreenheight());		if(gui_active == 0)			sound_play();		else {			sound_pause();			video_copyscreen();		}	}	else if(gui_active) return;	else if(new_joy1 & INPUT_LOADSTATE)	loadstate();	else if(new_joy1 & INPUT_SAVESTATE)	savestate();#ifdef SCREENSHOTS	else if(new_joy1 & INPUT_SCREENSHOT)screenshot();#endif}

void oled_game_over(){	oled_clear_screen();		sound_play(GAMEOVER); //Play game over music		char message1[] = "GAME OVER";	//char message2[] = "YOU DIED";	oled_goto_line(3);	oled_changeColumn(2);	oled_print(message1);		_delay_ms(3000);	sound_play(SILENCE); //prevent looping	_delay_ms(1000);}

void phaser(int ship, int x, int y){    int bank = weapon_get_bank(ship,x,y);    if (bank < 0)        return;    int id = -1;    int i;    int c = 0;    for (i=0; i<50; i++) {        if (shots_active[i].type == WEAPON_INACTIVE) {            if (id < 0)                id = i;        } else if (shots_active[i].type == WEAPON_PHASER) {            if (shots_active[i].ship == ship && shots_active[i].bank == bank)                c++;        }    }    if (c >= ships[ship].weapons[bank] || id < 0)        return;    sound_play(SND_PHASER);    shots_active[id].type = WEAPON_PHASER;    shots_active[id].ship = ship;    shots_active[id].bank = bank;    shots_active[id].tx = x;    shots_active[id].ty = y;    shots_active[id].ticks = 0;    shots_active[id].pos = 0;}

void main_poke(){   sound_stop();   DialogBox(hIn, MAKEINTRESOURCE(IDD_POKE), wnd, pokedlg);   eat();   sound_play();}

void opensnap(){   sound_stop();   opensnap(0);   eat();   sound_play();}

/* fireball 
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