Import blues from 436ab46f

Makefile

@@ -37,7 +37,7 @@ game_p2.o: $(P2_SRCS:.c=.o)
 	ld -r -o $@ $^
 	objcopy --localize-hidden $@
 
-blues: main.o sys_sdl2.o util.o game_bb.o game_ja.o game_p2.o
+blues: main.o mixer.o sys_sdl2.o util.o game_bb.o game_ja.o game_p2.o
 	$(CC) $(LDFLAGS) -o $@ $^ $(SDL_LIBS) $(MODPLUG_LIBS)
 
 clean:

bb/game.c

@@ -266,7 +266,7 @@ static void do_inter_screen() {
 	fade_out_palette();
 }
 
-void game_main() {
+static void game_run() {
 	play_music(0);
 	screen_init();
 	g_vars.start_level = 0;
@@ -351,15 +351,11 @@ void game_main() {
 	}
 }
 
-static void game_run(const char *data_path) {
-	res_init(data_path, GAME_SCREEN_W * GAME_SCREEN_H);
-	sound_init();
-	game_main();
-	sound_fini();
-	res_fini();
-}
-
 EXPORT_SYMBOL struct game_t game_bb = {
 	"Blues Brothers",
+	res_init,
+	res_fini,
+	sound_init,
+	sound_fini,
 	game_run
 };

bb/game.h

@@ -203,7 +203,6 @@ extern uint8_t *level_tilesdata_1e8c[];
 
 /* game.c */
 extern void	update_input();
-extern void	game_main();
 
 /* level.c */
 extern void	load_level_data(int num);

bb/sound.c

@@ -1,11 +1,9 @@
 
 #include "game.h"
 #include "resource.h"
-#include "sys.h"
+#include "mixer.h"
 #include "util.h"
 
-#include <libmodplug/modplug.h>
-
 #define PAULA_FREQ 3546897
 
 static const struct {
@@ -40,17 +38,6 @@ static const char *_modules[] = {
 	"shot",   "mod.shot"
 };
 
-struct mixerchannel_t {
-	uint8_t *data;
-	uint32_t pos;
-	uint32_t step;
-	uint32_t size;
-};
-
-static const int _rate = SYS_AUDIO_FREQ;
-static struct mixerchannel_t _channel;
-static ModPlugFile *_mpf;
-
 static uint8_t *load_file(const char *filename, int *size, uint8_t *buffer) {
 	FILE *fp = fopen_nocase(g_res.datapath, filename);
 	if (!fp) {
@@ -76,63 +63,19 @@ static uint8_t *load_file(const char *filename, int *size, uint8_t *buffer) {
 	return buffer;
 }
 
-static void mix(void *param, uint8_t *buf, int len) {
-	memset(buf, 0, len);
-	if (_mpf) {
-		const int count = ModPlug_Read(_mpf, buf, len);
-		if (count == 0) {
-			ModPlug_SeekOrder(_mpf, 0);
-		}
-	}
-	if (_channel.data) {
-		for (int i = 0; i < len; i += sizeof(int16_t)) {
-			const int pos = _channel.pos >> 16;
-			if (pos >= _channel.size) {
-				_channel.data = 0;
-				break;
-			}
-			const int sample = *(int16_t *)(buf + i) + ((int8_t)_channel.data[pos]) * 256;
-			*(int16_t *)(buf + i) = (sample < -32768 ? -32768 : (sample > 32767 ? 32767 : sample));
-			_channel.pos += _channel.step;
-		}
-	}
-}
-
 void sound_init() {
-	ModPlug_Settings mp_settings;
-	memset(&mp_settings, 0, sizeof(mp_settings));
-	ModPlug_GetSettings(&mp_settings);
-	mp_settings.mFlags = MODPLUG_ENABLE_OVERSAMPLING | MODPLUG_ENABLE_NOISE_REDUCTION;
-	mp_settings.mChannels = 1;
-	mp_settings.mBits = 16;
-	mp_settings.mFrequency = _rate;
-	mp_settings.mResamplingMode = MODPLUG_RESAMPLE_FIR;
-	mp_settings.mLoopCount = -1;
-	ModPlug_SetSettings(&mp_settings);
-	g_sys.start_audio(mix, 0);
 }
 
 void sound_fini() {
-	g_sys.stop_audio();
 }
 
 void play_sound(int num) {
 	if (g_res.snd) {
-		g_sys.lock_audio();
+		g_mix.play_sound(g_res.snd + _sounds_amiga[num].offset * 2, _sounds_amiga[num].size, PAULA_FREQ / 0x358, 0);
-		_channel.data = g_res.snd + _sounds_amiga[num].offset * 2;
-		_channel.pos = 0;
-		_channel.step = ((PAULA_FREQ / 0x358) << 16) / _rate;
-		_channel.size = _sounds_amiga[num].size;
-		g_sys.unlock_audio();
 	}
 }
 
 void play_music(int num) {
-	g_sys.lock_audio();
-	if (_mpf) {
-		ModPlug_Unload(_mpf);
-		_mpf = 0;
-	}
 	const char *filename = _modules[num * 2]; // Amiga
 	int size = 0;
 	uint8_t *buf = load_file(filename, &size, 0);
@@ -167,16 +110,15 @@ void play_music(int num) {
 					size += samples[i].size;
 				}
 			}
-			_mpf = ModPlug_Load(buf, size);
+			g_mix.play_music(buf, size);
 			free(buf);
 		}
 	} else { // ExoticA
 		filename = _modules[num * 2 + 1];
 		buf = load_file(filename, &size, 0);
 		if (buf) {
-			_mpf = ModPlug_Load(buf, size);
+			g_mix.play_music(buf, size);
 			free(buf);
 		}
 	}
-	g_sys.unlock_audio();
 }

intern.h

@@ -63,7 +63,11 @@ struct options_t {
 
 struct game_t {
 	const char *name;
-	void (*run)(const char *data_path);
+	void (*res_init)(const char *data_path, int vga_size);
+	void (*res_fini)();
+	void (*snd_init)();
+	void (*snd_fini)();
+	void (*run)();
 };
 
 #ifdef _WIN32

ja/game.c

@@ -309,7 +309,7 @@ void do_game_win_screen() {
 	}
 }
 
-void game_main() {
+static void game_run() {
 	play_music(0);
 	do_splash_screen();
 	g_sys.set_screen_palette(common_palette_data, 0, 128, 6);
@@ -343,15 +343,11 @@ void game_main() {
 	}
 }
 
-static void game_run(const char *data_path) {
-	res_init(data_path, GAME_SCREEN_W * GAME_SCREEN_H);
-	sound_init();
-	game_main();
-	sound_fini();
-	res_fini();
-}
-
 EXPORT_SYMBOL struct game_t game_ja = {
-	"Blues Brothers : Jukebox Adventure",
+	"Blues Brothers: Jukebox Adventure",
+	res_init,
+	res_fini,
+	sound_init,
+	sound_fini,
 	game_run
 };

ja/game.h

@@ -199,7 +199,6 @@ extern const uint8_t *player_anim_table[];
 
 /* game.c */
 extern void	update_input();
-extern void	game_main();
 extern void	do_game_over_screen();
 extern void	do_game_win_screen();
 extern void	do_difficulty_screen();

ja/sound.c

@@ -1,11 +1,9 @@
 
 #include "game.h"
 #include "resource.h"
-#include "sys.h"
+#include "mixer.h"
 #include "util.h"
 
-#include <libmodplug/modplug.h>
-
 #define MAX_SOUNDS 16
 
 static const char *_modules[] = {
@@ -16,63 +14,25 @@ static const char *_modules[] = {
 	"shoot.mod"
 };
 
-struct mixerchannel_t {
-	uint8_t *data;
-	uint32_t pos;
-	uint32_t step;
-	uint32_t size;
-	const int8_t *seq;
-};
-
 static struct {
 	uint16_t offset;
 	uint16_t size;
 } _samples[MAX_SOUNDS];
 
-static const int _rate = SYS_AUDIO_FREQ;
+static const int8_t *_seq;
-static struct mixerchannel_t _channel;
-static ModPlugFile *_mpf;
 
-static void mix(void *param, uint8_t *buf, int len) {
+static void repeat_sound_cb(const uint8_t **data, uint32_t *size) {
-	memset(buf, 0, len);
+	const int next = _seq ? *_seq++ : -1;
-	if (_mpf) {
+	if (next < 0) {
-		const int count = ModPlug_Read(_mpf, buf, len);
+		*data = 0;
-		if (count == 0) {
+		*size = 0;
-			ModPlug_SeekOrder(_mpf, 0);
+	} else {
-		}
+		*data = g_res.samples + _samples[next].offset;
-	}
+		*size = _samples[next].size;
-	if (_channel.data) {
-		for (int i = 0; i < len; i += sizeof(int16_t)) {
-			int pos = _channel.pos >> 16;
-			if (pos >= _channel.size) {
-				const int next = _channel.seq ? *_channel.seq++ : -1;
-				if (next < 0) {
-					_channel.data = 0;
-					break;
-				}
-				_channel.data = g_res.samples + _samples[next].offset;
-				_channel.pos = pos = 0;
-				_channel.size = _samples[next].size;
-			}
-			const int sample = *(int16_t *)(buf + i) + ((int8_t)_channel.data[pos]) * 256;
-			*(int16_t *)(buf + i) = (sample < -32768 ? -32768 : (sample > 32767 ? 32767 : sample));
-			_channel.pos += _channel.step;
-		}
 	}
 }
 
 void sound_init() {
-	ModPlug_Settings mp_settings;
-	memset(&mp_settings, 0, sizeof(mp_settings));
-	ModPlug_GetSettings(&mp_settings);
-	mp_settings.mFlags = MODPLUG_ENABLE_OVERSAMPLING | MODPLUG_ENABLE_NOISE_REDUCTION;
-	mp_settings.mChannels = 1;
-	mp_settings.mBits = 16;
-	mp_settings.mFrequency = _rate;
-	mp_settings.mResamplingMode = MODPLUG_RESAMPLE_FIR;
-	mp_settings.mLoopCount = -1;
-	ModPlug_SetSettings(&mp_settings);
-	g_sys.start_audio(mix, 0);
 	uint16_t offset = 0;
 	for (int i = 0; i < MAX_SOUNDS; ++i) {
 		const int num = i;
@@ -83,41 +43,28 @@ void sound_init() {
 }
 
 void sound_fini() {
-	g_sys.stop_audio();
 }
 
 void play_sound(int num) {
 	assert(num < MAX_SOUNDS);
 	const int sample_offset = _samples[num].offset;
 	const int sample_size = _samples[num].size;
-	print_debug(DBG_MIXER, "sample num %d offset 0x%x size %d", num, sample_offset, sample_size);
+	print_debug(DBG_SOUND, "sample num %d offset 0x%x size %d", num, sample_offset, sample_size);
 	if (sample_size == 0) {
 		return;
 	}
-	g_sys.lock_audio();
+	if (num == 10) {
-	_channel.data = g_res.samples + sample_offset;
-	_channel.pos = 0;
-	_channel.step = (8000 << 16) / _rate;
-	_channel.size = sample_size;
-	if (num == 10)  {
 		static const int8_t seq[] = { 10, 10, 10, 6, -1 };
-		_channel.seq = seq + 1;
+		_seq = seq + 1;
 	} else {
-		_channel.seq = 0;
+		_seq = 0;
 	}
-	g_sys.unlock_audio();
+	g_mix.play_sound(g_res.samples + sample_offset, sample_size, 8000, _seq ? repeat_sound_cb : 0);
 }
 
 void play_music(int num) {
-	g_sys.lock_audio();
-	if (_mpf) {
-		ModPlug_Unload(_mpf);
-		_mpf = 0;
-	}
 	const int size = load_file(_modules[num]);
-	_mpf = ModPlug_Load(g_res.tmp, size);
+	if (size != 0) {
-	if (_mpf) {
+		g_mix.play_music(g_res.tmp, size);
-		print_debug(DBG_MIXER, "Loaded module '%s'", ModPlug_GetName(_mpf));
 	}
-	g_sys.unlock_audio();
 }

main.c

@@ -2,6 +2,7 @@
 #include <getopt.h>
 #include <sys/stat.h>
 #include "sys.h"
+#include "mixer.h"
 #include "util.h"
 
 struct options_t g_options;
@@ -36,9 +37,9 @@ static struct game_t *detect_game(const char *data_path) {
 		const char *filename;
 		uint16_t size;
 	} games[] = {
-		{ &game_bb, "AVTMAG.SQV",  3069 },
+		{ &game_bb, "MAGASIN.BIN",  2560 },
-		{ &game_ja, "JARDIN.EAT", 24876 },
+		{ &game_ja, "JARDIN.EAT",  24876 },
-		{ &game_p2, "MOTIF.SQZ",   9396 },
+		{ &game_p2, "MOTIF.SQZ",    9396 },
 		{ 0, 0, 0 }
 	};
 	for (int i = 0; games[i].game; ++i) {
@@ -51,18 +52,6 @@ static struct game_t *detect_game(const char *data_path) {
 	return 0;
 }
 
-#if defined(PSP)
-/* stubs */
-void sound_init() {
-}
-void sound_fini() {
-}
-void play_sound(int num) {
-}
-void play_music(int num) {
-}
-#endif
-
 int main(int argc, char *argv[]) {
 	const char *data_path = DEFAULT_DATA_PATH;
 	int scale_factor = DEFAULT_SCALE_FACTOR;
@@ -168,7 +157,13 @@ int main(int argc, char *argv[]) {
 	} else {
 		g_sys.init();
 		g_sys.set_screen_size(GAME_SCREEN_W, GAME_SCREEN_H, game->name, scale_factor, scale_filter, fullscreen);
-		game->run(data_path);
+		game->res_init(data_path, GAME_SCREEN_W * GAME_SCREEN_H);
+		game->snd_init();
+		g_mix.init();
+		game->run();
+		g_mix.fini();
+		game->snd_fini();
+		game->res_fini();
 		g_sys.fini();
 	}
 	if (data_path != DEFAULT_DATA_PATH) {

mixer.c

@@ -0,0 +1,94 @@
+
+#include "mixer.h"
+#include "sys.h"
+#include "util.h"
+
+#include <libmodplug/modplug.h>
+
+struct mixerchannel_t {
+	const uint8_t *data;
+	uint32_t pos;
+	uint32_t step;
+	uint32_t size;
+	mix_repeat_sound_cb repeat_cb;
+};
+
+static const int _rate = SYS_AUDIO_FREQ;
+static struct mixerchannel_t _channel;
+static ModPlugFile *_mpf;
+
+static void mix(void *param, uint8_t *buf, int len) {
+	memset(buf, 0, len);
+	if (_mpf) {
+		const int count = ModPlug_Read(_mpf, buf, len);
+		if (count == 0) {
+			ModPlug_SeekOrder(_mpf, 0);
+		}
+	}
+	if (_channel.data) {
+		for (int i = 0; i < len; i += sizeof(int16_t)) {
+			int pos = _channel.pos >> 16;
+			if (pos >= _channel.size) {
+				_channel.data = 0;
+				if (_channel.repeat_cb) {
+					_channel.repeat_cb(&_channel.data, &_channel.size);
+				}
+				if (!_channel.data) {
+					break;
+				}
+				_channel.pos = pos = 0;
+			}
+			const int sample = *(int16_t *)(buf + i) + ((int8_t)_channel.data[pos]) * 256;
+			*(int16_t *)(buf + i) = (sample < -32768 ? -32768 : (sample > 32767 ? 32767 : sample));
+			_channel.pos += _channel.step;
+		}
+	}
+}
+
+static void mixer_init() {
+	ModPlug_Settings mp_settings;
+	memset(&mp_settings, 0, sizeof(mp_settings));
+	ModPlug_GetSettings(&mp_settings);
+	mp_settings.mFlags = MODPLUG_ENABLE_OVERSAMPLING | MODPLUG_ENABLE_NOISE_REDUCTION;
+	mp_settings.mChannels = 1;
+	mp_settings.mBits = 16;
+	mp_settings.mFrequency = _rate;
+	mp_settings.mResamplingMode = MODPLUG_RESAMPLE_FIR;
+	mp_settings.mLoopCount = -1;
+	ModPlug_SetSettings(&mp_settings);
+	g_sys.start_audio(mix, 0);
+}
+
+static void mixer_fini() {
+	g_sys.stop_audio();
+}
+
+static void play_sound(const uint8_t *data, uint32_t size, int freq, mix_repeat_sound_cb repeat_cb) {
+	g_sys.lock_audio();
+	_channel.data = data;
+	_channel.pos = 0;
+	_channel.step = (freq << 16) / _rate;
+	_channel.size = size;
+	_channel.repeat_cb = repeat_cb;
+	g_sys.unlock_audio();
+}
+
+static void play_music(const uint8_t *data, uint32_t size) {
+	g_sys.lock_audio();
+	if (_mpf) {
+		ModPlug_Unload(_mpf);
+		_mpf = 0;
+	}
+	_mpf = ModPlug_Load(data, size);
+	if (_mpf) {
+		print_debug(DBG_MIXER, "Loaded module '%s'", ModPlug_GetName(_mpf));
+	}
+	g_sys.unlock_audio();
+}
+
+struct mixer_t g_mix = {
+	.init = mixer_init,
+	.fini = mixer_fini,
+	.play_sound = play_sound,
+	.play_music = play_music,
+};

mixer.h

@@ -0,0 +1,18 @@
+
+#ifndef MIXER_H__
+#define MIXER_H__
+
+#include "intern.h"
+
+typedef void (*mix_repeat_sound_cb)(const uint8_t **data, uint32_t *size);
+
+struct mixer_t {
+	void (*init)();
+	void (*fini)();
+	void (*play_sound)(const uint8_t *data, uint32_t size, int freq, mix_repeat_sound_cb repeat_cb);
+	void (*play_music)(const uint8_t *data, uint32_t size);
+};
+
+extern struct mixer_t g_mix;
+
+#endif

p2/game.c

@@ -16,10 +16,6 @@ void update_input() {
 	g_vars.input.key_down  = (g_sys.input.direction & INPUT_DIRECTION_DOWN) != 0  ? 0xFF : 0;
 	g_vars.input.key_space = g_sys.input.space ? 0xFF : 0;
 	g_vars.input.key_jump  = g_sys.input.jump  ? 0xFF : 0;
-
-	g_vars.input.keystate[2] = g_sys.input.digit1;
-	g_vars.input.keystate[3] = g_sys.input.digit2;
-	g_vars.input.keystate[4] = g_sys.input.digit3;
 }
 
 static void wait_input(int timeout) {
@@ -182,9 +178,8 @@ void do_gameover_screen() {
 	uint8_t *data = load_file("GAMEOVER.SQZ");
 	if (data) {
 		video_copy_img(data);
-		video_copy_background();
 		g_sys.set_screen_palette(gameover_palette_data, 0, 16, 6);
-		g_sys.copy_bitmap(g_res.vga, GAME_SCREEN_W, GAME_SCREEN_H);
+		update_screen_img(g_res.background, 0);
 		do_gameover_animation();
 		g_sys.fade_out_palette();
 		free(data);
@@ -214,16 +209,15 @@ static bool do_menu() {
 		update_screen_img(data + 768, 0);
 		g_sys.fade_in_palette();
 		free(data);
-		memset(g_vars.input.keystate, 0, sizeof(g_vars.input.keystate));
 		const uint32_t start = g_sys.get_timestamp();
 		while (!g_sys.input.quit) {
 			update_input();
-			if (g_vars.input.keystate[2] || g_vars.input.keystate[0x4F] || g_sys.input.space) {
+			if (g_sys.input.digit1 || g_sys.input.space) {
 				g_sys.input.space = 0;
 				g_sys.fade_out_palette();
 				break;
 			}
-			if (g_vars.input.keystate[3] || g_vars.input.keystate[0x50]) {
+			if (g_sys.input.digit2 || g_vars.input.key_down) {
 				g_sys.fade_out_palette();
 				break;
 			}
@@ -241,13 +235,13 @@ static void do_photos_screen() {
 }
 
 void input_check_ctrl_alt_e() {
-	if (g_vars.input.keystate[0x1D] && g_vars.input.keystate[0x38] && g_vars.input.keystate[0x12]) {
+	if (0) {
 		do_photos_screen();
 	}
 }
 
 void input_check_ctrl_alt_w() {
-	if (g_vars.input.keystate[0x1D] && g_vars.input.keystate[0x38] && g_vars.input.keystate[0x11]) {
+	if (0) {
 		do_credits();
 		wait_input(60);
 	}
@@ -318,9 +312,8 @@ uint16_t random_get_number3(uint16_t x) {
 	return rol16(x, 3);
 }
 
-static void game_run(const char *data_path) {
+static void game_run() {
-	res_init(data_path, GAME_SCREEN_W * GAME_SCREEN_H);
+	video_init();
-	sound_init();
 	video_convert_tiles(g_res.uniondat, g_res.unionlen);
 	g_vars.level_num = g_options.start_level;
 	do_programmed_in_1992_screen();
@@ -359,12 +352,13 @@ static void game_run(const char *data_path) {
 			print_debug(DBG_GAME, "previous level %d current %d", level_num, g_vars.level_num);
 		} while (!g_res.dos_demo && g_vars.level_num != level_num);
 	}
-	sound_fini();
-	res_fini();
 }
 
 EXPORT_SYMBOL struct game_t game_p2 = {
 	"Prehistorik 2",
+	res_init,
+	res_fini,
+	sound_init,
+	sound_fini,
 	game_run
 };
-

p2/game.h

@@ -119,7 +119,6 @@ struct vars_t {
 		uint16_t d, e;
 	} random;
 	struct {
-		bool keystate[128];
 		uint8_t key_left, key_right, key_down, key_up, key_space, key_jump;
 		uint8_t key_vdir, key_hdir;
 		uint16_t demo_offset;
@@ -322,7 +321,6 @@ extern void	random_reset();
 extern uint8_t	random_get_number();
 extern uint16_t	random_get_number2();
 extern uint16_t	random_get_number3(uint16_t x);
-extern void	game_main();
 
 /* level.c */
 extern void	do_level();
@@ -337,6 +335,7 @@ extern void	monster_change_next_anim(struct object_t *obj);
 extern void	monster_change_prev_anim(struct object_t *obj);
 
 /* screen.c */
+extern void	video_init();
 extern void	video_draw_string(int offset, int hspace, const char *s);
 extern void	video_clear();
 extern void	video_copy_img(const uint8_t *src);
@@ -352,6 +351,7 @@ extern void	video_load_front_tiles();
 extern void	video_transition_close();
 extern void	video_transition_open();
 extern void	video_load_sprites();
+extern void	video_set_sprite_pos_flags(int flag);
 extern void	video_draw_sprite(int num, int x, int y, int flag);
 extern void	video_put_pixel(int x, int y, uint8_t color);
 

p2/level.c

@@ -12,7 +12,6 @@ static const bool _demo_inputs = false;
 
 static const bool _expert = true;
 
-static const bool _redraw_tilemap = true;
 static const bool _redraw_panel = true;
 
 static const uint16_t _undefined = 0x55AA;
@@ -323,51 +322,23 @@ static void level_update_tilemap() {
 		} else if (g_vars.level_animated_tiles_current_tbl == g_vars.tile_tbl3) {
 			g_vars.level_animated_tiles_current_tbl = g_vars.tile_tbl1;
 		}
-	} else {
-		if (!_redraw_tilemap) {
-			return;
-		}
 	}
 	video_copy_background();
 	g_vars.tile_attr2_flags = 0;
 	uint16_t offset = (g_vars.tilemap.y << 8) | g_vars.tilemap.x;
-	for (int y = 0; y < (TILEMAP_SCREEN_H / 16) + 1; ++y) {
+	int tilemap_w = (TILEMAP_SCREEN_W / 16) + 1;
-		for (int x = 0; x < (TILEMAP_SCREEN_W / 16) + 1; ++x) {
+	int tilemap_h = (TILEMAP_SCREEN_H / 16) + 1;
+	if (g_vars.level_num == 9) { /* minotaur boss expects original screen resolution */
+		offset = 0;
+		tilemap_w = 320 / 16;
+		tilemap_h = (200 - PANEL_H) / 16;
+	}
+	for (int y = 0; y < tilemap_h; ++y) {
+		for (int x = 0; x < tilemap_w; ++x) {
 			const uint8_t tile_num = level_get_tile(offset + x);
 			g_vars.tile_attr2_flags |= g_res.level.tile_attributes2[tile_num];
-			if (_redraw_tilemap || g_vars.animated_tile_flag_tbl[tile_num] != 0) {
+			const uint8_t num = g_vars.level_animated_tiles_current_tbl[tile_num];
-				const uint8_t num = g_vars.level_animated_tiles_current_tbl[tile_num];
+			level_draw_tile(num, x, y);
-				level_draw_tile(num, x, y);
-			}
-		}
-		offset += 256;
-	}
-}
-
-static void level_draw_tilemap() {
-	if (_redraw_tilemap) {
-		return;
-	}
-	if (g_vars.tilemap.redraw_flag1 == 0) {
-		const bool changed = (g_vars.tilemap.x != g_vars.tilemap.prev_x) || (g_vars.tilemap.y != g_vars.tilemap.prev_y);
-		if (!changed) {
-			return;
-		}
-		g_vars.tilemap.prev_x = g_vars.tilemap.x;
-		g_vars.tilemap.prev_y = g_vars.tilemap.y;
-		if (g_vars.tilemap.redraw_flag2 == 0) {
-			return;
-		}
-	}
-	g_vars.tilemap.redraw_flag1 = 0;
-	g_vars.tilemap.redraw_flag2 = 0;
-	g_vars.tile_attr2_flags = 0;
-	uint16_t offset = (g_vars.tilemap.y << 8) | g_vars.tilemap.x;
-	for (int y = 0; y < (TILEMAP_SCREEN_H / 16) + 1; ++y) {
-		for (int x = 0; x < TILEMAP_SCREEN_W / 16; ++x) {
-			const uint8_t tile_num = level_get_tile(offset + x);
-			g_vars.tile_attr2_flags |= g_res.level.tile_attributes2[tile_num];
-			level_draw_tile(tile_num, x, y);
 		}
 		offset += 256;
 	}
@@ -621,7 +592,6 @@ static void level_init_tilemap() {
 	g_vars.tilemap.redraw_flag2 = 1;
 	g_vars.tilemap.prev_x = _undefined;
 	g_vars.tilemap.prev_y = _undefined;
-	level_draw_tilemap();
 	video_transition_open();
 }
 
@@ -2388,17 +2358,6 @@ static void level_update_player_flying() {
 
 static void level_update_player() {
 	g_vars.objects_tbl[0].spr_num = 0xFFFF;
-	if (g_vars.input.keystate[0x3B]) {
-		if (g_vars.restart_level_flag == 0) {
-			level_player_die();
-			g_vars.restart_level_flag = 1;
-			return;
-		}
-	}
-	if (g_vars.input.keystate[0x3C]) {
-		g_vars.player_death_flag = 1;
-		return;
-	}
 	input_check_ctrl_alt_w();
 	if (_demo_inputs) {
 		if (g_vars.input.demo_offset < g_res.keyblen) {
@@ -3014,7 +2973,6 @@ static void level_update_gates() {
 				g_vars.boss_level5.idle_counter = 8;
 				memset(&g_vars.objects_tbl[91], 0xFF, sizeof(struct object_t) * 6);
 			}
-			level_draw_tilemap();
 			level_update_objects_decors();
 			level_update_objects_items();
 			level_update_objects_monsters();
@@ -3267,16 +3225,20 @@ static void level_update_light_palette() {
 	}
 }
 
-static void level_sync() {
+static void level_wait() {
 	update_input();
-	g_sys.copy_bitmap(g_res.vga, GAME_SCREEN_W, GAME_SCREEN_H);
-	g_sys.update_screen();
-	g_sys.render_clear_sprites();
 	const int diff = (g_vars.timestamp + (1000 / 30)) - g_sys.get_timestamp();
 	g_sys.sleep(MAX(diff, 10));
 	g_vars.timestamp = g_sys.get_timestamp();
 }
 
+static void level_sync() {
+	g_sys.copy_bitmap(g_res.vga, GAME_SCREEN_W, GAME_SCREEN_H);
+	g_sys.update_screen();
+	g_sys.render_clear_sprites();
+	level_wait();
+}
+
 static void level_draw_objects() {
 	++g_vars.level_draw_counter;
 	for (int i = OBJECTS_COUNT - 1; i >= 0; --i) {
@@ -3482,7 +3444,6 @@ static void level_player_death_animation() {
 		level_update_objects_bonuses();
 		level_update_objects_bonus_scores();
 		level_update_tilemap();
-		level_draw_tilemap();
 		level_draw_panel();
 		level_draw_orbs();
 		level_draw_objects();
@@ -3572,6 +3533,7 @@ static int level_completed_bonuses_animation_helper() {
 }
 
 static void level_completed_bonuses_animation() {
+	video_set_sprite_pos_flags(1); /* center */
 	if (g_vars.light.state != 0) {
 		g_vars.light.palette_flag1 = 0;
 		g_vars.light.palette_flag2 = 1;
@@ -3728,6 +3690,7 @@ static void level_completed_bonuses_animation() {
 			g_vars.objects_tbl[1].x_pos += 2;
 		}
 	} while (g_vars.objects_tbl[2].x_pos > -52);
+	video_set_sprite_pos_flags(0);
 }
 
 static void update_object_demo_animation(struct object_t *obj) {
@@ -3868,6 +3831,7 @@ void do_gameover_animation() {
 		g_vars.objects_tbl[i].spr_num = 0xFFFF;
 	}
 	video_load_sprites();
+	video_set_sprite_pos_flags(1); /* center */
 	g_vars.tilemap.x = g_vars.tilemap.scroll_dx = 0;
 	g_vars.tilemap.y = g_vars.tilemap.scroll_dy = 0;
 	static const char *gameover = "GAMEOVER";
@@ -3909,11 +3873,14 @@ void do_gameover_animation() {
 		do_gameover_animation_helper();
 		level_draw_objects();
 		level_update_panel();
-		level_sync();
+		g_sys.update_screen();
+		g_sys.render_clear_sprites();
+		level_wait();
 		if (g_sys.input.quit) {
 			return;
 		}
 	} while (timer_counter < 630 && !g_sys.input.space);
+	video_set_sprite_pos_flags(0);
 }
 
 void do_level() {
@@ -3949,7 +3916,6 @@ void do_level() {
 		g_vars.tilemap_adjust_player_pos_flag = false;
 		level_update_scrolling();
 		level_update_tilemap();
-		level_draw_tilemap();
 		level_draw_panel();
 		level_draw_orbs();
 		level_draw_objects();

p2/screen.c

@@ -11,6 +11,15 @@
 #define MAX_SPRITESHEET_H 1024
 #define MAX_FRONT_TILES 168
 
+static int _spr_pos_flags;
+
+static int _offset_x_center, _offset_y_center;
+
+void video_init() {
+	_offset_x_center = (GAME_SCREEN_W > 320) ? (GAME_SCREEN_W - 320) / 2 : 0;
+	_offset_y_center = (GAME_SCREEN_H > 200) ? (GAME_SCREEN_H - 200) / 2 : 0;
+}
+
 static void decode_planar(const uint8_t *src, uint8_t *dst, int dst_pitch, int w, int h, uint8_t transparent_color) {
 	const int plane_size = h * w / 8;
 	for (int y = 0; y < h; ++y) {
@@ -279,7 +288,15 @@ void video_load_sprites() {
 	}
 }
 
+void video_set_sprite_pos_flags(int flags) {
+	_spr_pos_flags = flags;
+}
+
 void video_draw_sprite(int num, int x, int y, int flag) {
+	if (_spr_pos_flags) {
+		x += _offset_x_center;
+		y += _offset_y_center;
+	}
 	g_sys.render_add_sprite(RENDER_SPR_GAME, num, x, y, flag != 0);
 }
 

p2/sound.c

@@ -1,31 +1,16 @@
 
 #include "game.h"
 #include "resource.h"
-#include "sys.h"
+#include "mixer.h"
 #include "util.h"
 
-#include <libmodplug/modplug.h>
-
 #define MAX_SOUNDS 11
 
-static const bool _volume = false;
-
 static const uint16_t sound_sizes_tbl[] = {
 	0x188E, 0x1C80, 0x235E, 0x19E6, 0x0AB2, 0x0912, 0x0000, 0x35D2,
 	0x06C4, 0x1C86, 0x0E2E
 };
 
-static const uint8_t sound_volume_tbl[] = {
-	0x3F,0x37,0x32,0x2F,0x2C,0x2A,0x28,0x27,0x26,0x24,0x23,0x22,0x21,0x21,0x20,0x1F,
-	0x1E,0x1E,0x1D,0x1C,0x1C,0x1B,0x1B,0x1A,0x1A,0x19,0x19,0x19,0x18,0x18,0x17,0x17,
-	0x17,0x16,0x16,0x16,0x15,0x15,0x15,0x15,0x14,0x14,0x14,0x14,0x13,0x13,0x13,0x13,
-	0x12,0x12,0x12,0x12,0x11,0x11,0x11,0x11,0x11,0x10,0x10,0x10,0x10,0x10,0x0F,0x0F,
-	0x0F,0x0F,0x0F,0x0F,0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,
-	0x0D,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,
-	0x0B,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x09,0x09,0x09,0x09,0x09,0x09,
-	0x09,0x09,0x09,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x07,0x07
-};
-
 static const char *trk_names_tbl[] = {
 	"PRES.TRK",
 	"CODE.TRK",
@@ -47,85 +32,35 @@ static const char *trk_names_tbl[] = {
 	"BOULA.TRK"
 };
 
-struct mixerchannel_t {
-	uint8_t *data;
-	uint32_t pos;
-	uint32_t step;
-	uint32_t size;
-};
-
-static const int _rate = SYS_AUDIO_FREQ;
-static struct mixerchannel_t _channel;
-static ModPlugFile *_mpf;
 static int _music_num;
 
 static uint16_t sound_offsets_tbl[MAX_SOUNDS];
 
-static void mix(void *param, uint8_t *buf, int len) {
-	memset(buf, 0, len);
-	if (_mpf) {
-		const int count = ModPlug_Read(_mpf, buf, len);
-		if (count == 0) {
-			ModPlug_SeekOrder(_mpf, 0);
-		}
-	}
-	if (_channel.data) {
-		for (int i = 0; i < len; i += sizeof(int16_t)) {
-			const int pos = _channel.pos >> 16;
-			if (pos >= _channel.size) {
-				_channel.data = 0;
-				break;
-			}
-			const int8_t pcm = _volume ? sound_volume_tbl[(_channel.data[pos] ^ 0x80) >> 1] : _channel.data[pos];
-			const int sample = *(int16_t *)(buf + i) + pcm * 256;
-			*(int16_t *)(buf + i) = (sample < -32768 ? -32768 : (sample > 32767 ? 32767 : sample));
-			_channel.pos += _channel.step;
-		}
-	}
-}
-
 void sound_init() {
-	ModPlug_Settings mp_settings;
-	memset(&mp_settings, 0, sizeof(mp_settings));
-	ModPlug_GetSettings(&mp_settings);
-	mp_settings.mFlags = MODPLUG_ENABLE_OVERSAMPLING | MODPLUG_ENABLE_NOISE_REDUCTION;
-	mp_settings.mChannels = 1;
-	mp_settings.mBits = 16;
-	mp_settings.mFrequency = _rate;
-	mp_settings.mResamplingMode = MODPLUG_RESAMPLE_FIR;
-	mp_settings.mLoopCount = -1;
-	ModPlug_SetSettings(&mp_settings);
 	uint16_t offset = 0;
 	for (int i = 0; i < MAX_SOUNDS; ++i) {
 		sound_offsets_tbl[i] = offset;
 		offset += sound_sizes_tbl[i];
 	}
 	_music_num = -1;
-	g_sys.start_audio(mix, 0);
 }
 
 void sound_fini() {
-	g_sys.stop_audio();
 }
 
 void play_sound(int num) {
 	assert(num < MAX_SOUNDS);
-	print_debug(DBG_MIXER, "play_sound %d", num);
+	print_debug(DBG_SOUND, "play_sound %d", num);
 	if (!g_res.samples) { /* no SAMPLE. file with demo */
 		return;
 	}
 	const int sample_offset = sound_offsets_tbl[num];
 	const int sample_size = sound_sizes_tbl[num];
-	print_debug(DBG_MIXER, "sample num %d offset 0x%x size %d", num, sample_offset, sample_size);
+	print_debug(DBG_SOUND, "sample num %d offset 0x%x size %d", num, sample_offset, sample_size);
 	if (sample_size == 0) {
 		return;
 	}
-	g_sys.lock_audio();
+	g_mix.play_sound(g_res.samples + sample_offset, sample_size, 8000, 0);
-	_channel.data = g_res.samples + sample_offset;
-	_channel.pos = 0;
-	_channel.step = (8000 << 16) / _rate;
-	_channel.size = sample_size;
-	g_sys.unlock_audio();
 }
 
 void play_music(int num) {
@@ -137,21 +72,12 @@ void play_music(int num) {
 	}
 	const char *filename = trk_names_tbl[num];
 	if (filename) {
-		print_debug(DBG_MIXER, "play_music '%s'", filename);
+		print_debug(DBG_SOUND, "play_music '%s'", filename);
-		g_sys.lock_audio();
-		if (_mpf) {
-			ModPlug_Unload(_mpf);
-			_mpf = 0;
-		}
 		uint8_t *data = load_file(filename);
 		if (data) {
-			_mpf = ModPlug_Load(data, g_uncompressed_size);
+			g_mix.play_music(data, g_uncompressed_size);
-			if (_mpf) {
-				print_debug(DBG_MIXER, "Loaded module '%s'", ModPlug_GetName(_mpf));
-			}
 			free(data);
 			_music_num = num;
 		}
-		g_sys.unlock_audio();
 	}
 }

util.c

@@ -73,13 +73,17 @@ FILE *fopen_nocase(const char *path, const char *filename) {
 	snprintf(buf, sizeof(buf), "%s/%s", path, filename);
 	FILE *fp = fopen(buf, "rb");
 	if (!fp) {
+		static void (*const str[3])(char *) = {
+			string_upper,
+			string_lower,
+			0
+		};
 		char *p = buf + strlen(path) + 1;
-		string_upper(p);
+		for (int i = 0; str[i] && !fp; ++i) {
-		fp = fopen(buf, "rb");
+			(str[i])(p);
-		if (!fp) {
+			if (strcmp(filename, p) != 0) {
-			char *p = buf + strlen(path) + 1;
+				fp = fopen(buf, "rb");
-			string_lower(p);
+			}
-			fp = fopen(buf, "rb");
 		}
 	}
 	return fp;

util.h

@@ -11,6 +11,7 @@
 #define DBG_SYSTEM    (1 << 4)
 #define DBG_UNPACK    (1 << 5)
 #define DBG_SCREEN    (1 << 6)
+#define DBG_SOUND     (1 << 7)
 
 extern int g_debug_mask;