buffering, PCM DMA, memcpy12bswap

git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@66 be3aeb3a-fb24-0410-a615-afba39da0efa

gp2x/Makefile

@@ -43,7 +43,7 @@ OBJS += ../../Pico/Area.o ../../Pico/Cart.o ../../Pico/Utils.o ../../Pico/Memory
 # Pico - CD
 OBJS += ../../Pico/cd/Pico.o ../../Pico/cd/Memory.o ../../Pico/cd/Sek.o ../../Pico/cd/LC89510.o \
 		../../Pico/cd/cd_sys.o ../../Pico/cd/cd_file.o ../../Pico/cd/gfx_cd.o \
-		../../Pico/cd/Area.o ../../Pico/cd/Misc.o ../../Pico/cd/pcm.o
+		../../Pico/cd/Area.o ../../Pico/cd/Misc.o ../../Pico/cd/pcm.o ../../Pico/cd/buffering.o
 # asm stuff
 ifeq "$(asm_render)" "1"
 DEFINC += -D_ASM_DRAW_C

gp2x/emu.c

@@ -496,6 +496,7 @@ int emu_ReadConfig(int game)
 		currentConfig.KeyBinds[23] = 1<<29; // vol up
 		currentConfig.KeyBinds[22] = 1<<30; // vol down
 		currentConfig.gamma = 100;
+		currentConfig.PicoCDBuffers = 64;
 		strncpy(cfg, PicoConfigFile, 511);
 		cfg[511] = 0;
 	} else {
@@ -517,6 +518,7 @@ int emu_ReadConfig(int game)
 	PsndRate = currentConfig.PsndRate;
 	PicoRegionOverride = currentConfig.PicoRegion;
 	PicoAutoRgnOrder = currentConfig.PicoAutoRgnOrder;
+	PicoCDBuffers = currentConfig.PicoCDBuffers;
 	if (PicoOpt & 0x20) {
 		actionNames[ 8] = "Z"; actionNames[ 9] = "Y";
 		actionNames[10] = "X"; actionNames[11] = "MODE";
@@ -555,6 +557,7 @@ int emu_WriteConfig(int game)
 		currentConfig.PsndRate = PsndRate;
 		currentConfig.PicoRegion = PicoRegionOverride;
 		currentConfig.PicoAutoRgnOrder = PicoAutoRgnOrder;
+		currentConfig.PicoCDBuffers = PicoCDBuffers;
 		bwrite = fwrite(&currentConfig, 1, sizeof(currentConfig), f);
 		fflush(f);
 		fclose(f);
@@ -1068,6 +1071,9 @@ void emu_Loop(void)
 		PsndOut = 0;
 	}
 
+	// prepare CD buffer
+	if (PicoMCD & 1) PicoCDBufferInit();
+
 	// loop?
 	while (engineState == PGS_Running)
 	{
@@ -1253,6 +1259,9 @@ if (Pico.m.frame_count == 31563) {
 		frames_done++; frames_shown++;
 	}
 
+
+	if (PicoMCD & 1) PicoCDBufferFree();
+
 	// save SRAM
 	if((currentConfig.EmuOpt & 1) && SRam.changed) {
 		osd_text(4, 232, "Writing SRAM/BRAM..");

gp2x/emu.h

@@ -31,6 +31,7 @@ typedef struct {
 	int gamma;
 	int JoyBinds[4][32];
 	int PicoAutoRgnOrder;
+	int PicoCDBuffers;
 } currentConfig_t;
 
 extern char romFileName[];

gp2x/menu.c

@@ -729,6 +729,10 @@ static void kc_sel_loop(void)
 static void draw_cd_menu_options(int menu_sel, char *b_us, char *b_eu, char *b_jp)
 {
 	int tl_x = 25, tl_y = 60, y;
+	char ra_buff[16];
+
+	if (PicoCDBuffers > 1) sprintf(ra_buff, "%5iK", PicoCDBuffers * 2);
+	else strcpy(ra_buff, "     OFF");
 
 	y = tl_y;
 	//memset(gp2x_screen, 0, 320*240);
@@ -741,6 +745,7 @@ static void draw_cd_menu_options(int menu_sel, char *b_us, char *b_eu, char *b_j
 	gp2x_text_out8(tl_x, (y+=10), "CDDA audio (using mp3s)    %s", (currentConfig.PicoOpt&0x0800)?"ON":"OFF"); // 4
 	gp2x_text_out8(tl_x, (y+=10), "PCM audio                  %s", (currentConfig.PicoOpt&0x0400)?"ON":"OFF"); // 5
 	gp2x_text_out8(tl_x, (y+=10), "Better sync (very slow)    %s", (currentConfig.PicoOpt&0x2000)?"ON":"OFF"); // 6
+	gp2x_text_out8(tl_x, (y+=10), "ReadAhead buffer      %s", ra_buff); // 7
 	gp2x_text_out8(tl_x, (y+=10), "Done");
 
 	// draw cursor
@@ -756,7 +761,7 @@ static void draw_cd_menu_options(int menu_sel, char *b_us, char *b_eu, char *b_j
 
 static void cd_menu_loop_options(void)
 {
-	int menu_sel = 0, menu_sel_max = 7;
+	int menu_sel = 0, menu_sel_max = 8;
 	unsigned long inp = 0;
 	char bios_us[32], bios_eu[32], bios_jp[32], *bios, *p;
 
@@ -787,7 +792,17 @@ static void cd_menu_loop_options(void)
 				case  4: currentConfig.PicoOpt^=0x0800; break;
 				case  5: currentConfig.PicoOpt^=0x0400; break;
 				case  6: currentConfig.PicoOpt^=0x2000; break;
-				case  7: return;
+				case  7:
+					if (inp & GP2X_LEFT) {
+						PicoCDBuffers >>= 1;
+						if (PicoCDBuffers < 64) PicoCDBuffers = 0;
+					} else {
+						if (PicoCDBuffers < 64) PicoCDBuffers = 64;
+						else PicoCDBuffers <<= 1;
+						if (PicoCDBuffers > 4096) PicoCDBuffers = 4096;
+					}
+					break;
+				case  8: return;
 			}
 		}
 		if(inp & (GP2X_X|GP2X_A)) return;

linux/Makefile

@@ -32,7 +32,7 @@ OBJS += ../../Pico/Area.o ../../Pico/Cart.o ../../Pico/Utils.o ../../Pico/Memory
 # Pico - CD
 OBJS += ../../Pico/cd/Pico.o ../../Pico/cd/Memory.o ../../Pico/cd/Sek.o ../../Pico/cd/LC89510.o \
 		../../Pico/cd/cd_sys.o ../../Pico/cd/cd_file.o ../../Pico/cd/gfx_cd.o \
-		../../Pico/cd/Area.o ../../Pico/cd/Misc.o ../../Pico/cd/pcm.o
+		../../Pico/cd/Area.o ../../Pico/cd/Misc.o ../../Pico/cd/pcm.o ../../Pico/cd/buffering.o
 # Pico - sound
 OBJS += ../../Pico/sound/sound.o ../../Pico/sound/sn76496.o ../../Pico/sound/ym2612.o ../../Pico/sound/mix.o
 # zlib