[picodrive.git] / platform / gp2x / 940ctl.c

#include <stdio.h>\r
#include <stdlib.h>\r
#include <string.h>\r
#include <unistd.h>\r
#include <sys/mman.h>\r
#include <sys/ioctl.h>\r
#include <fcntl.h>\r
#include <errno.h>\r
\r
#include "code940/940shared.h"\r
#include "gp2x.h"\r
#include "emu.h"\r
#include "menu.h"\r
#include "asmutils.h"\r
#include "mp3.h"\r
#include "../../Pico/PicoInt.h"\r
#include "../../Pico/sound/mix.h"\r
\r
/* we will need some gp2x internals here */\r
extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */\r
extern volatile unsigned long  *gp2x_memregl;\r
\r
extern int reset_timing;\r
static unsigned char *shared_mem = 0;\r
static _940_data_t *shared_data = 0;\r
_940_ctl_t *shared_ctl = 0;\r
unsigned char *mp3_mem = 0;\r
\r
#define MP3_SIZE_MAX (0x1000000 - 4*640*480)\r
\r
int crashed_940 = 0;\r
\r
static FILE *loaded_mp3 = 0;\r
\r
/***********************************************************/\r
\r
#define MAXOUT		(+32767)\r
#define MINOUT		(-32768)\r
\r
/* limitter */\r
#define Limit(val, max,min) { \\r
	if ( val > max )      val = max; \\r
	else if ( val < min ) val = min; \\r
}\r
\r
/* these will be managed locally on our side */\r
extern int   *ym2612_dacen;\r
extern INT32 *ym2612_dacout;\r
extern void  *ym2612_regs;\r
\r
static UINT8 *REGS = 0;		/* we will also keep local copy of regs for savestates and such */\r
static INT32 addr_A1;		/* address line A1      */\r
static int	 dacen;\r
static INT32 dacout;\r
static UINT8 ST_address;	/* address register     */\r
static UINT8 ST_status;		/* status flag          */\r
static UINT8 ST_mode;		/* mode  CSM / 3SLOT    */\r
static int   ST_TA;			/* timer a              */\r
static int   ST_TAC;		/* timer a maxval       */\r
static int   ST_TAT;		/* timer a ticker       */\r
static UINT8 ST_TB;			/* timer b              */\r
static int   ST_TBC;		/* timer b maxval       */\r
static int   ST_TBT;		/* timer b ticker       */\r
\r
static int   writebuff_ptr = 0;\r
\r
\r
/* OPN Mode Register Write */\r
static int set_timers( int v )\r
{\r
	int change;\r
\r
	/* b7 = CSM MODE */\r
	/* b6 = 3 slot mode */\r
	/* b5 = reset b */\r
	/* b4 = reset a */\r
	/* b3 = timer enable b */\r
	/* b2 = timer enable a */\r
	/* b1 = load b */\r
	/* b0 = load a */\r
	change = (ST_mode ^ v) & 0xc0;\r
	ST_mode = v;\r
\r
	/* reset Timer b flag */\r
	if( v & 0x20 )\r
		ST_status &= ~2;\r
\r
	/* reset Timer a flag */\r
	if( v & 0x10 )\r
		ST_status &= ~1;\r
\r
	return change;\r
}\r
\r
/* YM2612 write */\r
/* a = address */\r
/* v = value   */\r
/* returns 1 if sample affecting state changed */\r
int YM2612Write_940(unsigned int a, unsigned int v)\r
{\r
	int addr;\r
	int upd = 1;	/* the write affects sample generation */\r
\r
	v &= 0xff;	/* adjust to 8 bit bus */\r
	a &= 3;\r
\r
	//printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r
\r
	switch( a ) {\r
	case 0:	/* address port 0 */\r
		if (!addr_A1 && ST_address == v)\r
			return 0;	/* address already selected, don't send this command to 940 */\r
		ST_address = v;\r
		/* don't send DAC or timer related address changes to 940 */\r
		if (!addr_A1 && (v & 0xf0) == 0x20 &&\r
			(v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a))\r
				return 0;\r
		addr_A1 = 0;\r
		upd = 0;\r
		break;\r
\r
	case 1:	/* data port 0    */\r
		if (addr_A1 != 0) {\r
			return 0;	/* verified on real YM2608 */\r
		}\r
\r
		addr = ST_address;\r
		REGS[addr] = v;\r
\r
		switch( addr & 0xf0 )\r
		{\r
		case 0x20:	/* 0x20-0x2f Mode */\r
			switch( addr )\r
			{\r
			case 0x24: { // timer A High 8\r
					int TAnew = (ST_TA & 0x03)|(((int)v)<<2);\r
					if(ST_TA != TAnew) {\r
						// we should reset ticker only if new value is written. Outrun requires this.\r
						ST_TA = TAnew;\r
						ST_TAC = (1024-TAnew)*18;\r
						ST_TAT = 0;\r
					}\r
					return 0;\r
				}\r
			case 0x25: { // timer A Low 2\r
					int TAnew = (ST_TA & 0x3fc)|(v&3);\r
					if(ST_TA != TAnew) {\r
						ST_TA = TAnew;\r
						ST_TAC = (1024-TAnew)*18;\r
						ST_TAT = 0;\r
					}\r
					return 0;\r
				}\r
			case 0x26: // timer B\r
				if(ST_TB != v) {\r
					ST_TB = v;\r
					ST_TBC  = (256-v)<<4;\r
					ST_TBC *= 18;\r
					ST_TBT  = 0;\r
				}\r
				return 0;\r
			case 0x27:	/* mode, timer control */\r
				if (set_timers( v ))\r
					break; // other side needs ST.mode for 3slot mode\r
				return 0;\r
			case 0x2a:	/* DAC data (YM2612) */\r
				dacout = ((int)v - 0x80) << 6;	/* level unknown (notaz: 8 seems to be too much) */\r
				return 0;\r
			case 0x2b:	/* DAC Sel  (YM2612) */\r
				/* b7 = dac enable */\r
				dacen = v & 0x80;\r
				upd = 0;\r
				break; // other side has to know this\r
			default:\r
				break;\r
			}\r
			break;\r
		}\r
		break;\r
\r
	case 2:	/* address port 1 */\r
		if (addr_A1 && ST_address == v)\r
			return 0;\r
		ST_address = v;\r
		addr_A1 = 1;\r
		upd = 0;\r
		break;\r
\r
	case 3:	/* data port 1    */\r
		if (addr_A1 != 1) {\r
			return 0;	/* verified on real YM2608 */\r
		}\r
\r
		addr = ST_address | 0x100;\r
		REGS[addr] = v;\r
		break;\r
	}\r
\r
	//printf("ym pass\n");\r
\r
	if(currentConfig.EmuOpt & 4) {\r
		UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r
\r
		/* detect rapid ym updates */\r
		if (upd && !(writebuff_ptr & 0x80000000) && Pico.m.scanline < 224) {\r
			int mid = Pico.m.pal ? 68 : 93;\r
			if (Pico.m.scanline > mid) {\r
				//printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, Pico.m.scanline);\r
				writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r
				writebuff_ptr |= 0x80000000;\r
				//printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, Pico.m.scanline, addr, v, upd);\r
			}\r
		}\r
\r
		/* queue this write for 940 */\r
		if ((writebuff_ptr&0xffff) < 2047) {\r
			writebuff[writebuff_ptr++ & 0xffff] = (a<<8)|v;\r
		} else {\r
			printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r
		}\r
	}\r
\r
	return 0; // cause the engine to do updates once per frame only\r
}\r
\r
UINT8 YM2612Read_940(void)\r
{\r
	return ST_status;\r
}\r
\r
\r
int YM2612PicoTick_940(int n)\r
{\r
	//int ret = 0;\r
\r
	// timer A\r
	if(ST_mode & 0x01 && (ST_TAT+=64*n) >= ST_TAC) {\r
		ST_TAT -= ST_TAC;\r
		if(ST_mode & 0x04) ST_status |= 1;\r
		// CSM mode total level latch and auto key on\r
/*		FIXME\r
		if(ST_mode & 0x80) {\r
			CSMKeyControll( &(ym2612_940->CH[2]) ); // Vectorman2, etc.\r
			ret = 1;\r
		}\r
*/\r
	}\r
\r
	// timer B\r
	if(ST_mode & 0x02 && (ST_TBT+=64*n) >= ST_TBC) {\r
		ST_TBT -= ST_TBC;\r
		if(ST_mode & 0x08) ST_status |= 2;\r
	}\r
\r
	return 0;\r
}\r
\r
\r
#define CHECK_BUSY(job) \\r
	(gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r
\r
static void wait_busy_940(int job)\r
{\r
	int i;\r
\r
	job--;\r
	for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r
		spend_cycles(8*1024); // tested to be best for mp3 dec\r
	if (i < 0x10000) return;\r
\r
	/* 940 crashed */\r
	printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r
	for (i = 0; i < 8; i++)\r
		printf("%i ", shared_ctl->vstarts[i]);\r
	printf(")\n");\r
	printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
		gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
	printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
	printf("trying to interrupt..\n");\r
	gp2x_memregs[0x3B3E>>1] = 0xffff;\r
	for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r
		spend_cycles(8*1024);\r
	printf("i = 0x%x\n", i);\r
	printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
		gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
	printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
\r
	strcpy(menuErrorMsg, "940 crashed.");\r
	engineState = PGS_Menu;\r
	crashed_940 = 1;\r
}\r
\r
\r
static void add_job_940(int job)\r
{\r
	if (job <= 0 || job > 16) {\r
		printf("add_job_940: bad job: %i\n", job);\r
		return;\r
	}\r
\r
	// generate interrupt for this job\r
	job--;\r
	gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r
\r
//	printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r
}\r
\r
\r
void YM2612PicoStateLoad_940(void)\r
{\r
	int i, old_A1 = addr_A1;\r
\r
	// feed all the registers and update internal state\r
	for(i = 0; i < 0x100; i++) {\r
		YM2612Write_940(0, i);\r
		YM2612Write_940(1, REGS[i]);\r
	}\r
	for(i = 0; i < 0x100; i++) {\r
		YM2612Write_940(2, i);\r
		YM2612Write_940(3, REGS[i|0x100]);\r
	}\r
\r
	addr_A1 = old_A1;\r
\r
//	add_job_940(JOB940_PICOSTATELOAD);\r
}\r
\r
\r
static void internal_reset(void)\r
{\r
	writebuff_ptr = 0;\r
	ST_mode   = 0;\r
	ST_status = 0;	/* normal mode */\r
	ST_TA     = 0;\r
	ST_TAC    = 0;\r
	ST_TB     = 0;\r
	ST_TBC    = 0;\r
	dacen = 0;\r
}\r
\r
\r
/* this must be called after mmu hack, the allocated regions must not get cached */\r
void sharedmem_init(void)\r
{\r
	if (shared_mem != NULL) return;\r
\r
	shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r
	if(shared_mem == MAP_FAILED)\r
	{\r
		printf("mmap(shared_data) failed with %i\n", errno);\r
		exit(1);\r
	}\r
	shared_data = (_940_data_t *) (shared_mem+0x100000);\r
	/* this area must not get buffered on either side */\r
	shared_ctl =  (_940_ctl_t *)  (shared_mem+0x200000);\r
	mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x3000000);\r
	if (mp3_mem == MAP_FAILED)\r
	{\r
		printf("mmap(mp3_mem) failed with %i\n", errno);\r
		exit(1);\r
	}\r
	crashed_940 = 1;\r
}\r
\r
\r
void sharedmem_deinit(void)\r
{\r
	munmap(shared_mem, 0x210000);\r
	munmap(mp3_mem, MP3_SIZE_MAX);\r
	shared_mem = mp3_mem = NULL;\r
	shared_data = NULL;\r
	shared_ctl = NULL;\r
}\r
\r
\r
extern char **g_argv;\r
\r
/* none of the functions in this file should be called before this one */\r
void YM2612Init_940(int baseclock, int rate)\r
{\r
	printf("YM2612Init_940()\n");\r
	printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r
\r
	Reset940(1, 2);\r
	Pause940(1);\r
\r
	gp2x_memregs[0x3B40>>1] = 0;      // disable DUALCPU interrupts for 920\r
	gp2x_memregs[0x3B42>>1] = 1;      // enable  DUALCPU interrupts for 940\r
\r
	gp2x_memregl[0x4504>>2] = 0;        // make sure no FIQs will be generated\r
	gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r
\r
\r
	if (crashed_940)\r
	{\r
		unsigned char ucData[1024];\r
		int nRead, i, nLen = 0;\r
		char binpath[1024];\r
		FILE *fp;\r
\r
		strncpy(binpath, g_argv[0], 1023);\r
		binpath[1023] = 0;\r
		for (i = strlen(binpath); i > 0; i--)\r
			if (binpath[i] == '/') { binpath[i] = 0; break; }\r
		strcat(binpath, "/code940.bin");\r
\r
		fp = fopen(binpath, "rb");\r
		if(!fp)\r
		{\r
			memset(gp2x_screen, 0, 320*240);\r
			gp2x_text_out8(10, 100, "failed to open required file:");\r
			gp2x_text_out8(10, 110, "code940.bin");\r
			gp2x_video_flip();\r
			printf("failed to open %s\n", binpath);\r
			exit(1);\r
		}\r
\r
		while(1)\r
		{\r
			nRead = fread(ucData, 1, 1024, fp);\r
			if(nRead <= 0)\r
				break;\r
			memcpy(shared_mem + nLen, ucData, nRead);\r
			nLen += nRead;\r
		}\r
		fclose(fp);\r
		crashed_940 = 0;\r
	}\r
\r
	memset(shared_data, 0, sizeof(*shared_data));\r
	memset(shared_ctl,  0, sizeof(*shared_ctl));\r
\r
	REGS = YM2612GetRegs();\r
\r
	ym2612_dacen  = &dacen;\r
	ym2612_dacout = &dacout;\r
\r
	internal_reset();\r
\r
	loaded_mp3 = 0;\r
\r
	gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r
	gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r
	gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r
\r
	/* start the 940 */\r
	Reset940(0, 2);\r
	Pause940(0);\r
\r
	// YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r
\r
	/* now cause 940 to init it's ym2612 stuff */\r
	shared_ctl->baseclock = baseclock;\r
	shared_ctl->rate = rate;\r
	add_job_940(JOB940_INITALL);\r
}\r
\r
\r
void YM2612ResetChip_940(void)\r
{\r
	printf("YM2612ResetChip_940()\n");\r
	if (shared_data == NULL) {\r
		printf("YM2612ResetChip_940: reset before init?\n");\r
		return;\r
	}\r
\r
	internal_reset();\r
\r
	add_job_940(JOB940_YM2612RESETCHIP);\r
}\r
\r
\r
int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r
{\r
	int *ym_buf = shared_data->ym_buffer;\r
	int ym_active_chs;\r
\r
	//printf("YM2612UpdateOne_940()\n");\r
\r
	if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
\r
	ym_active_chs = shared_ctl->ym_active_chs;\r
\r
	// mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r
	if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r
	else memset32(buffer, 0, length<<stereo);\r
\r
	if (shared_ctl->writebuffsel == 1) {\r
		shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
	} else {\r
		shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
	}\r
	writebuff_ptr = 0;\r
\r
	/* predict sample counter for next frame */\r
	if (PsndLen_exc_add) {\r
		if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length = PsndLen + 1;\r
		else length = PsndLen;\r
	}\r
\r
	/* give 940 ym job */\r
	shared_ctl->writebuffsel ^= 1;\r
	shared_ctl->length = length;\r
	shared_ctl->stereo = stereo;\r
\r
	add_job_940(JOB940_YM2612UPDATEONE);\r
\r
	return ym_active_chs;\r
}\r
\r
\r
static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r
static int mp3_play_bufsel = 0, mp3_job_started = 0;\r
\r
void mp3_update(int *buffer, int length, int stereo)\r
{\r
	int length_mp3;\r
	int cdda_on;\r
\r
	// not data track, CDC is reading, playback was started, track not ended\r
	cdda_on = !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1) &&\r
			loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r
\r
	if (!cdda_on) return;\r
\r
	if (!(PicoOpt&0x200)) {\r
		mp3_update_local(buffer, length, stereo);\r
		return;\r
	}\r
\r
	length_mp3 = length;\r
	if (PsndRate == 22050) length_mp3 <<= 1;	// mp3s are locked to 44100Hz stereo\r
	else if (PsndRate == 11025) length_mp3 <<= 2;	// so make length 44100ish\r
\r
	/* do we have to wait? */\r
	if (mp3_job_started && mp3_samples_ready < length_mp3) {\r
		if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
		mp3_job_started = 0;\r
		mp3_samples_ready += 1152;\r
	}\r
\r
	/* mix mp3 data, only stereo */\r
	if (mp3_samples_ready >= length_mp3)\r
	{\r
		int shr = 0;\r
		void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r
		if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r
		else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r
\r
		if (1152 - mp3_buffer_offs >= length_mp3) {\r
			mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r
\r
			mp3_buffer_offs += length_mp3;\r
		} else {\r
			// collect samples from both buffers..\r
			int left = 1152 - mp3_buffer_offs;\r
			if (mp3_play_bufsel == 0)\r
			{\r
				mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r
				mp3_buffer_offs = length_mp3 - left;\r
				mp3_play_bufsel = 1;\r
			} else {\r
				mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r
				mp3_buffer_offs = length_mp3 - left;\r
				mix_samples(buffer + ((left>>shr)<<1),\r
					shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r
				mp3_play_bufsel = 0;\r
			}\r
		}\r
		mp3_samples_ready -= length_mp3;\r
	}\r
\r
	// ask to decode more if we already can\r
	if (!mp3_job_started)\r
	{\r
		mp3_job_started = 1;\r
		shared_ctl->mp3_buffsel ^= 1;\r
		add_job_940(JOB940_MP3DECODE);\r
	}\r
}\r
\r
\r
/***********************************************************/\r
\r
void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r
{\r
	int byte_offs = 0;\r
\r
	if (!(PicoOpt&0x800)) { // cdda disabled?\r
		return;\r
	}\r
\r
	if (loaded_mp3 != f)\r
	{\r
		// printf("loading mp3... "); fflush(stdout);\r
		if (PicoMessage != NULL)\r
		{\r
			fseek(f, 0, SEEK_END);\r
			if (ftell(f) > 2*1024*1024)\r
				PicoMessage("Loading MP3...");\r
		}\r
		fseek(f, 0, SEEK_SET);\r
		fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r
		// if (feof(f)) printf("done.\n");\r
		// else printf("done. mp3 too large, not all data loaded.\n");\r
		shared_ctl->mp3_len = ftell(f);\r
		loaded_mp3 = f;\r
\r
		if (PicoOpt&0x200) {\r
			// as we are going to change 940's cacheable area, we must invalidate it's cache..\r
			if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
			add_job_940(JOB940_INVALIDATE_DCACHE);\r
		}\r
		reset_timing = 1;\r
	}\r
\r
	// seek..\r
	if (pos) {\r
		byte_offs  = (shared_ctl->mp3_len << 6) >> 10;\r
		byte_offs *= pos;\r
		byte_offs >>= 6;\r
	}\r
	// printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r
\r
	shared_ctl->mp3_offs = byte_offs;\r
\r
	// reset buffer pointers and stuff..\r
	mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r
	mp3_job_started = 0;\r
	shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r
\r
	if (!(PicoOpt&0x200)) mp3_start_local();\r
}\r
\r
\r
int mp3_get_offset(void)\r
{\r
	int offs1024 = 0;\r
	int cdda_on;\r
\r
	cdda_on = (PicoMCD & 1) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r
			(Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r
\r
	if (cdda_on) {\r
		offs1024  = shared_ctl->mp3_offs << 7;\r
		offs1024 /= shared_ctl->mp3_len;\r
		offs1024 <<= 3;\r
	}\r
	printf("offs1024=%i (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r
\r
	return offs1024;\r
}\r
\r
\r
Commit	Line	Data
cc68a136	1	#include <stdio.h>\r
	2	#include <stdlib.h>\r
	3	#include <string.h>\r
	4	#include <unistd.h>\r
	5	#include <sys/mman.h>\r
	6	#include <sys/ioctl.h>\r
	7	#include <fcntl.h>\r
	8	#include <errno.h>\r
	9	\r
42c7b147	10	#include "code940/940shared.h"\r
cc68a136	11	#include "gp2x.h"\r
	12	#include "emu.h"\r
	13	#include "menu.h"\r
	14	#include "asmutils.h"\r
abe0ea43	15	#include "mp3.h"\r
cb0316e4	16	#include "../../Pico/PicoInt.h"\r
4f265db7	17	#include "../../Pico/sound/mix.h"\r
4f265db7	18	\r
cc68a136	19	/* we will need some gp2x internals here */\r
	20	extern volatile unsigned short gp2x_memregs; / from minimal library rlyeh */\r
	21	extern volatile unsigned long *gp2x_memregl;\r
	22	\r
00bd648e	23	extern int reset_timing;\r
cc68a136	24	static unsigned char *shared_mem = 0;\r
cc68a136	25	static _940_data_t *shared_data = 0;\r
abe0ea43	26	_940_ctl_t *shared_ctl = 0;\r
abe0ea43	27	unsigned char *mp3_mem = 0;\r
cb0316e4	28	\r
cb0316e4	29	#define MP3_SIZE_MAX (0x1000000 - 4640480)\r
cc68a136	30	\r
	31	int crashed_940 = 0;\r
	32	\r
51a902ae	33	static FILE *loaded_mp3 = 0;\r
cc68a136	34	\r
	35	/***********************************************************/\r
	36	\r
	37	#define MAXOUT (+32767)\r
	38	#define MINOUT (-32768)\r
	39	\r
	40	/* limitter */\r
	41	#define Limit(val, max,min) { \\r
	42	if ( val > max ) val = max; \\r
	43	else if ( val < min ) val = min; \\r
	44	}\r
	45	\r
	46	/* these will be managed locally on our side */\r
	47	extern int *ym2612_dacen;\r
	48	extern INT32 *ym2612_dacout;\r
	49	extern void *ym2612_regs;\r
	50	\r
	51	static UINT8 REGS = 0; / we will also keep local copy of regs for savestates and such */\r
	52	static INT32 addr_A1; /* address line A1 */\r
	53	static int dacen;\r
	54	static INT32 dacout;\r
	55	static UINT8 ST_address; /* address register */\r
	56	static UINT8 ST_status; /* status flag */\r
	57	static UINT8 ST_mode; /* mode CSM / 3SLOT */\r
	58	static int ST_TA; /* timer a */\r
	59	static int ST_TAC; /* timer a maxval */\r
	60	static int ST_TAT; /* timer a ticker */\r
	61	static UINT8 ST_TB; /* timer b */\r
	62	static int ST_TBC; /* timer b maxval */\r
	63	static int ST_TBT; /* timer b ticker */\r
	64	\r
	65	static int writebuff_ptr = 0;\r
	66	\r
	67	\r
	68	/* OPN Mode Register Write */\r
2433f409	69	static int set_timers( int v )\r
cc68a136	70	{\r
2433f409	71	int change;\r
2433f409	72	\r
cc68a136	73	/* b7 = CSM MODE */\r
	74	/* b6 = 3 slot mode */\r
	75	/* b5 = reset b */\r
	76	/* b4 = reset a */\r
	77	/* b3 = timer enable b */\r
	78	/* b2 = timer enable a */\r
	79	/* b1 = load b */\r
	80	/* b0 = load a */\r
2433f409	81	change = (ST_mode ^ v) & 0xc0;\r
cc68a136	82	ST_mode = v;\r
	83	\r
	84	/* reset Timer b flag */\r
	85	if( v & 0x20 )\r
	86	ST_status &= ~2;\r
	87	\r
	88	/* reset Timer a flag */\r
	89	if( v & 0x10 )\r
	90	ST_status &= ~1;\r
2433f409	91	\r
2433f409	92	return change;\r
cc68a136	93	}\r
	94	\r
	95	/* YM2612 write */\r
	96	/* a = address */\r
	97	/* v = value */\r
	98	/* returns 1 if sample affecting state changed */\r
	99	int YM2612Write_940(unsigned int a, unsigned int v)\r
	100	{\r
2433f409	101	int addr;\r
2433f409	102	int upd = 1; /* the write affects sample generation */\r
cc68a136	103	\r
	104	v &= 0xff; /* adjust to 8 bit bus */\r
	105	a &= 3;\r
	106	\r
2433f409	107	//printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r
2433f409	108	\r
cc68a136	109	switch( a ) {\r
cc68a136	110	case 0: /* address port 0 */\r
4ff2d527	111	if (!addr_A1 && ST_address == v)\r
4ff2d527	112	return 0; /* address already selected, don't send this command to 940 */\r
cc68a136	113	ST_address = v;\r
4ff2d527	114	/* don't send DAC or timer related address changes to 940 */\r
	115	if (!addr_A1 && (v & 0xf0) == 0x20 &&\r
	116	(v == 0x24 \|\| v == 0x25 \|\| v == 0x26 \|\| v == 0x2a))\r
	117	return 0;\r
cc68a136	118	addr_A1 = 0;\r
2433f409	119	upd = 0;\r
cc68a136	120	break;\r
	121	\r
	122	case 1: /* data port 0 */\r
	123	if (addr_A1 != 0) {\r
	124	return 0; /* verified on real YM2608 */\r
	125	}\r
	126	\r
	127	addr = ST_address;\r
	128	REGS[addr] = v;\r
	129	\r
	130	switch( addr & 0xf0 )\r
	131	{\r
	132	case 0x20: /* 0x20-0x2f Mode */\r
	133	switch( addr )\r
	134	{\r
	135	case 0x24: { // timer A High 8\r
	136	int TAnew = (ST_TA & 0x03)\|(((int)v)<<2);\r
	137	if(ST_TA != TAnew) {\r
	138	// we should reset ticker only if new value is written. Outrun requires this.\r
	139	ST_TA = TAnew;\r
	140	ST_TAC = (1024-TAnew)*18;\r
	141	ST_TAT = 0;\r
	142	}\r
	143	return 0;\r
	144	}\r
	145	case 0x25: { // timer A Low 2\r
	146	int TAnew = (ST_TA & 0x3fc)\|(v&3);\r
	147	if(ST_TA != TAnew) {\r
	148	ST_TA = TAnew;\r
	149	ST_TAC = (1024-TAnew)*18;\r
	150	ST_TAT = 0;\r
	151	}\r
	152	return 0;\r
	153	}\r
	154	case 0x26: // timer B\r
	155	if(ST_TB != v) {\r
	156	ST_TB = v;\r
	157	ST_TBC = (256-v)<<4;\r
	158	ST_TBC *= 18;\r
	159	ST_TBT = 0;\r
	160	}\r
	161	return 0;\r
	162	case 0x27: /* mode, timer control */\r
2433f409	163	if (set_timers( v ))\r
	164	break; // other side needs ST.mode for 3slot mode\r
	165	return 0;\r
cc68a136	166	case 0x2a: /* DAC data (YM2612) */\r
	167	dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */\r
	168	return 0;\r
	169	case 0x2b: /* DAC Sel (YM2612) */\r
	170	/* b7 = dac enable */\r
	171	dacen = v & 0x80;\r
2433f409	172	upd = 0;\r
cc68a136	173	break; // other side has to know this\r
	174	default:\r
	175	break;\r
	176	}\r
	177	break;\r
	178	}\r
	179	break;\r
	180	\r
	181	case 2: /* address port 1 */\r
4ff2d527	182	if (addr_A1 && ST_address == v)\r
4ff2d527	183	return 0;\r
cc68a136	184	ST_address = v;\r
cc68a136	185	addr_A1 = 1;\r
2433f409	186	upd = 0;\r
cc68a136	187	break;\r
	188	\r
	189	case 3: /* data port 1 */\r
	190	if (addr_A1 != 1) {\r
	191	return 0; /* verified on real YM2608 */\r
	192	}\r
	193	\r
	194	addr = ST_address \| 0x100;\r
	195	REGS[addr] = v;\r
	196	break;\r
	197	}\r
	198	\r
2433f409	199	//printf("ym pass\n");\r
2433f409	200	\r
cc68a136	201	if(currentConfig.EmuOpt & 4) {\r
2433f409	202	UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r
	203	\r
	204	/* detect rapid ym updates */\r
	205	if (upd && !(writebuff_ptr & 0x80000000) && Pico.m.scanline < 224) {\r
	206	int mid = Pico.m.pal ? 68 : 93;\r
	207	if (Pico.m.scanline > mid) {\r
	208	//printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, Pico.m.scanline);\r
	209	writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r
	210	writebuff_ptr \|= 0x80000000;\r
	211	//printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, Pico.m.scanline, addr, v, upd);\r
cc68a136	212	}\r
2433f409	213	}\r
	214	\r
	215	/* queue this write for 940 */\r
	216	if ((writebuff_ptr&0xffff) < 2047) {\r
	217	writebuff[writebuff_ptr++ & 0xffff] = (a<<8)\|v;\r
cc68a136	218	} else {\r
4ff2d527	219	printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r
cc68a136	220	}\r
	221	}\r
	222	\r
	223	return 0; // cause the engine to do updates once per frame only\r
	224	}\r
	225	\r
	226	UINT8 YM2612Read_940(void)\r
	227	{\r
	228	return ST_status;\r
	229	}\r
	230	\r
	231	\r
	232	int YM2612PicoTick_940(int n)\r
	233	{\r
	234	//int ret = 0;\r
	235	\r
	236	// timer A\r
	237	if(ST_mode & 0x01 && (ST_TAT+=64*n) >= ST_TAC) {\r
	238	ST_TAT -= ST_TAC;\r
	239	if(ST_mode & 0x04) ST_status \|= 1;\r
	240	// CSM mode total level latch and auto key on\r
	241	/* FIXME\r
	242	if(ST_mode & 0x80) {\r
	243	CSMKeyControll( &(ym2612_940->CH[2]) ); // Vectorman2, etc.\r
	244	ret = 1;\r
	245	}\r
	246	*/\r
	247	}\r
	248	\r
	249	// timer B\r
	250	if(ST_mode & 0x02 && (ST_TBT+=64*n) >= ST_TBC) {\r
	251	ST_TBT -= ST_TBC;\r
	252	if(ST_mode & 0x08) ST_status \|= 2;\r
	253	}\r
	254	\r
	255	return 0;\r
	256	}\r
	257	\r
	258	\r
abe0ea43	259	#define CHECK_BUSY(job) \\r
	260	(gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r
	261	\r
	262	static void wait_busy_940(int job)\r
cc68a136	263	{\r
cc68a136	264	int i;\r
cc68a136	265	\r
abe0ea43	266	job--;\r
abe0ea43	267	for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r
42c7b147	268	spend_cycles(8*1024); // tested to be best for mp3 dec\r
cc68a136	269	if (i < 0x10000) return;\r
	270	\r
	271	/* 940 crashed */\r
42c7b147	272	printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r
cc68a136	273	for (i = 0; i < 8; i++)\r
	274	printf("%i ", shared_ctl->vstarts[i]);\r
	275	printf(")\n");\r
abe0ea43	276	printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
4f265db7	277	gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
abe0ea43	278	printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
4f265db7	279	printf("trying to interrupt..\n");\r
4f265db7	280	gp2x_memregs[0x3B3E>>1] = 0xffff;\r
abe0ea43	281	for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r
4f265db7	282	spend_cycles(8*1024);\r
4f265db7	283	printf("i = 0x%x\n", i);\r
abe0ea43	284	printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
4f265db7	285	gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
abe0ea43	286	printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
4f265db7	287	\r
cc68a136	288	strcpy(menuErrorMsg, "940 crashed.");\r
	289	engineState = PGS_Menu;\r
	290	crashed_940 = 1;\r
cc68a136	291	}\r
	292	\r
	293	\r
abe0ea43	294	static void add_job_940(int job)\r
cc68a136	295	{\r
abe0ea43	296	if (job <= 0 \|\| job > 16) {\r
	297	printf("add_job_940: bad job: %i\n", job);\r
	298	return;\r
4f265db7	299	}\r
abe0ea43	300	\r
	301	// generate interrupt for this job\r
	302	job--;\r
	303	gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r
	304	\r
	305	// printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r
cc68a136	306	}\r
	307	\r
	308	\r
	309	void YM2612PicoStateLoad_940(void)\r
	310	{\r
	311	int i, old_A1 = addr_A1;\r
	312	\r
cc68a136	313	// feed all the registers and update internal state\r
	314	for(i = 0; i < 0x100; i++) {\r
	315	YM2612Write_940(0, i);\r
	316	YM2612Write_940(1, REGS[i]);\r
	317	}\r
	318	for(i = 0; i < 0x100; i++) {\r
	319	YM2612Write_940(2, i);\r
	320	YM2612Write_940(3, REGS[i\|0x100]);\r
	321	}\r
	322	\r
	323	addr_A1 = old_A1;\r
	324	\r
2433f409	325	// add_job_940(JOB940_PICOSTATELOAD);\r
cc68a136	326	}\r
	327	\r
	328	\r
	329	static void internal_reset(void)\r
	330	{\r
	331	writebuff_ptr = 0;\r
	332	ST_mode = 0;\r
	333	ST_status = 0; /* normal mode */\r
	334	ST_TA = 0;\r
	335	ST_TAC = 0;\r
	336	ST_TB = 0;\r
	337	ST_TBC = 0;\r
	338	dacen = 0;\r
	339	}\r
	340	\r
	341	\r
f80d67e1	342	/* this must be called after mmu hack, the allocated regions must not get cached */\r
	343	void sharedmem_init(void)\r
	344	{\r
	345	if (shared_mem != NULL) return;\r
	346	\r
	347	shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r
	348	if(shared_mem == MAP_FAILED)\r
	349	{\r
	350	printf("mmap(shared_data) failed with %i\n", errno);\r
	351	exit(1);\r
	352	}\r
	353	shared_data = (_940_data_t *) (shared_mem+0x100000);\r
	354	/* this area must not get buffered on either side */\r
	355	shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r
	356	mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0x3000000);\r
	357	if (mp3_mem == MAP_FAILED)\r
	358	{\r
	359	printf("mmap(mp3_mem) failed with %i\n", errno);\r
	360	exit(1);\r
	361	}\r
	362	crashed_940 = 1;\r
	363	}\r
	364	\r
	365	\r
85f8e929	366	void sharedmem_deinit(void)\r
	367	{\r
	368	munmap(shared_mem, 0x210000);\r
	369	munmap(mp3_mem, MP3_SIZE_MAX);\r
	370	shared_mem = mp3_mem = NULL;\r
	371	shared_data = NULL;\r
	372	shared_ctl = NULL;\r
	373	}\r
	374	\r
	375	\r
cc68a136	376	extern char **g_argv;\r
	377	\r
	378	/* none of the functions in this file should be called before this one */\r
	379	void YM2612Init_940(int baseclock, int rate)\r
	380	{\r
	381	printf("YM2612Init_940()\n");\r
b837b69b	382	printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(shared_data), sizeof(shared_ctl));\r
cc68a136	383	\r
b837b69b	384	Reset940(1, 2);\r
cc68a136	385	Pause940(1);\r
cc68a136	386	\r
4f265db7	387	gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r
4f265db7	388	gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r
cc68a136	389	\r
abe0ea43	390	gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r
	391	gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r
	392	\r
	393	\r
cc68a136	394	if (crashed_940)\r
	395	{\r
	396	unsigned char ucData[1024];\r
	397	int nRead, i, nLen = 0;\r
	398	char binpath[1024];\r
	399	FILE *fp;\r
	400	\r
	401	strncpy(binpath, g_argv[0], 1023);\r
	402	binpath[1023] = 0;\r
	403	for (i = strlen(binpath); i > 0; i--)\r
	404	if (binpath[i] == '/') { binpath[i] = 0; break; }\r
	405	strcat(binpath, "/code940.bin");\r
	406	\r
	407	fp = fopen(binpath, "rb");\r
	408	if(!fp)\r
	409	{\r
	410	memset(gp2x_screen, 0, 320*240);\r
	411	gp2x_text_out8(10, 100, "failed to open required file:");\r
	412	gp2x_text_out8(10, 110, "code940.bin");\r
	413	gp2x_video_flip();\r
	414	printf("failed to open %s\n", binpath);\r
	415	exit(1);\r
	416	}\r
	417	\r
	418	while(1)\r
	419	{\r
	420	nRead = fread(ucData, 1, 1024, fp);\r
	421	if(nRead <= 0)\r
	422	break;\r
	423	memcpy(shared_mem + nLen, ucData, nRead);\r
	424	nLen += nRead;\r
	425	}\r
	426	fclose(fp);\r
	427	crashed_940 = 0;\r
	428	}\r
	429	\r
	430	memset(shared_data, 0, sizeof(*shared_data));\r
	431	memset(shared_ctl, 0, sizeof(*shared_ctl));\r
	432	\r
	433	REGS = YM2612GetRegs();\r
	434	\r
	435	ym2612_dacen = &dacen;\r
	436	ym2612_dacout = &dacout;\r
	437	\r
	438	internal_reset();\r
	439	\r
51a902ae	440	loaded_mp3 = 0;\r
51a902ae	441	\r
4f265db7	442	gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r
abe0ea43	443	gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r
abe0ea43	444	gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r
cc68a136	445	\r
cc68a136	446	/* start the 940 */\r
b837b69b	447	Reset940(0, 2);\r
cc68a136	448	Pause940(0);\r
	449	\r
	450	// YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r
abe0ea43	451	\r
	452	/* now cause 940 to init it's ym2612 stuff */\r
	453	shared_ctl->baseclock = baseclock;\r
	454	shared_ctl->rate = rate;\r
	455	add_job_940(JOB940_INITALL);\r
cc68a136	456	}\r
	457	\r
	458	\r
	459	void YM2612ResetChip_940(void)\r
	460	{\r
	461	printf("YM2612ResetChip_940()\n");\r
	462	if (shared_data == NULL) {\r
	463	printf("YM2612ResetChip_940: reset before init?\n");\r
	464	return;\r
	465	}\r
	466	\r
cc68a136	467	internal_reset();\r
cc68a136	468	\r
abe0ea43	469	add_job_940(JOB940_YM2612RESETCHIP);\r
cc68a136	470	}\r
	471	\r
	472	\r
abe0ea43	473	int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r
cb0316e4	474	{\r
abe0ea43	475	int *ym_buf = shared_data->ym_buffer;\r
85f8e929	476	int ym_active_chs;\r
4f265db7	477	\r
abe0ea43	478	//printf("YM2612UpdateOne_940()\n");\r
	479	\r
	480	if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
	481	\r
85f8e929	482	ym_active_chs = shared_ctl->ym_active_chs;\r
abe0ea43	483	\r
85f8e929	484	// mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r
	485	if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r
	486	else memset32(buffer, 0, length<<stereo);\r
abe0ea43	487	\r
abe0ea43	488	if (shared_ctl->writebuffsel == 1) {\r
2433f409	489	shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
4f265db7	490	} else {\r
2433f409	491	shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
cb0316e4	492	}\r
abe0ea43	493	writebuff_ptr = 0;\r
	494	\r
	495	/* predict sample counter for next frame */\r
	496	if (PsndLen_exc_add) {\r
	497	if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length = PsndLen + 1;\r
	498	else length = PsndLen;\r
	499	}\r
	500	\r
	501	/* give 940 ym job */\r
	502	shared_ctl->writebuffsel ^= 1;\r
	503	shared_ctl->length = length;\r
	504	shared_ctl->stereo = stereo;\r
	505	\r
	506	add_job_940(JOB940_YM2612UPDATEONE);\r
	507	\r
85f8e929	508	return ym_active_chs;\r
cb0316e4	509	}\r
cb0316e4	510	\r
cb0316e4	511	\r
51a902ae	512	static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r
abe0ea43	513	static int mp3_play_bufsel = 0, mp3_job_started = 0;\r
cb0316e4	514	\r
abe0ea43	515	void mp3_update(int *buffer, int length, int stereo)\r
cc68a136	516	{\r
abe0ea43	517	int length_mp3;\r
abe0ea43	518	int cdda_on;\r
4f265db7	519	\r
abe0ea43	520	// not data track, CDC is reading, playback was started, track not ended\r
	521	cdda_on = !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1) &&\r
	522	loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r
cc68a136	523	\r
abe0ea43	524	if (!cdda_on) return;\r
cc68a136	525	\r
abe0ea43	526	if (!(PicoOpt&0x200)) {\r
	527	mp3_update_local(buffer, length, stereo);\r
	528	return;\r
	529	}\r
cc68a136	530	\r
abe0ea43	531	length_mp3 = length;\r
	532	if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r
	533	else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r
4f265db7	534	\r
abe0ea43	535	/* do we have to wait? */\r
	536	if (mp3_job_started && mp3_samples_ready < length_mp3) {\r
	537	if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
	538	mp3_job_started = 0;\r
	539	mp3_samples_ready += 1152;\r
	540	}\r
cb0316e4	541	\r
4f265db7	542	/* mix mp3 data, only stereo */\r
abe0ea43	543	if (mp3_samples_ready >= length_mp3)\r
cb0316e4	544	{\r
4f265db7	545	int shr = 0;\r
	546	void (mix_samples)(int dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r
	547	if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r
	548	else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r
cb0316e4	549	\r
4f265db7	550	if (1152 - mp3_buffer_offs >= length_mp3) {\r
abe0ea43	551	mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r
4f265db7	552	\r
4f265db7	553	mp3_buffer_offs += length_mp3;\r
cb0316e4	554	} else {\r
abe0ea43	555	// collect samples from both buffers..\r
cb0316e4	556	int left = 1152 - mp3_buffer_offs;\r
4f265db7	557	if (mp3_play_bufsel == 0)\r
4f265db7	558	{\r
abe0ea43	559	mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r
4f265db7	560	mp3_buffer_offs = length_mp3 - left;\r
	561	mp3_play_bufsel = 1;\r
	562	} else {\r
	563	mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r
	564	mp3_buffer_offs = length_mp3 - left;\r
	565	mix_samples(buffer + ((left>>shr)<<1),\r
	566	shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r
	567	mp3_play_bufsel = 0;\r
	568	}\r
cc68a136	569	}\r
4f265db7	570	mp3_samples_ready -= length_mp3;\r
cc68a136	571	}\r
cc68a136	572	\r
abe0ea43	573	// ask to decode more if we already can\r
abe0ea43	574	if (!mp3_job_started)\r
cb0316e4	575	{\r
abe0ea43	576	mp3_job_started = 1;\r
cb0316e4	577	shared_ctl->mp3_buffsel ^= 1;\r
abe0ea43	578	add_job_940(JOB940_MP3DECODE);\r
cb0316e4	579	}\r
cc68a136	580	}\r
cb0316e4	581	\r
	582	\r
	583	/***********************************************************/\r
	584	\r
	585	void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r
	586	{\r
	587	int byte_offs = 0;\r
	588	\r
1cd356a3	589	if (!(PicoOpt&0x800)) { // cdda disabled?\r
cb0316e4	590	return;\r
	591	}\r
	592	\r
	593	if (loaded_mp3 != f)\r
	594	{\r
4f265db7	595	// printf("loading mp3... "); fflush(stdout);\r
66fdc0f0	596	if (PicoMessage != NULL)\r
	597	{\r
	598	fseek(f, 0, SEEK_END);\r
	599	if (ftell(f) > 210241024)\r
	600	PicoMessage("Loading MP3...");\r
	601	}\r
cb0316e4	602	fseek(f, 0, SEEK_SET);\r
cb0316e4	603	fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r
4f265db7	604	// if (feof(f)) printf("done.\n");\r
4f265db7	605	// else printf("done. mp3 too large, not all data loaded.\n");\r
cb0316e4	606	shared_ctl->mp3_len = ftell(f);\r
cb0316e4	607	loaded_mp3 = f;\r
abe0ea43	608	\r
	609	if (PicoOpt&0x200) {\r
	610	// as we are going to change 940's cacheable area, we must invalidate it's cache..\r
	611	if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
	612	add_job_940(JOB940_INVALIDATE_DCACHE);\r
	613	}\r
00bd648e	614	reset_timing = 1;\r
cb0316e4	615	}\r
	616	\r
	617	// seek..\r
	618	if (pos) {\r
	619	byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r
	620	byte_offs *= pos;\r
	621	byte_offs >>= 6;\r
	622	}\r
4f265db7	623	// printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r
cb0316e4	624	\r
cb0316e4	625	shared_ctl->mp3_offs = byte_offs;\r
51a902ae	626	\r
abe0ea43	627	// reset buffer pointers and stuff..\r
51a902ae	628	mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r
abe0ea43	629	mp3_job_started = 0;\r
51a902ae	630	shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r
abe0ea43	631	\r
abe0ea43	632	if (!(PicoOpt&0x200)) mp3_start_local();\r
cb0316e4	633	}\r
	634	\r
	635	\r
75736070	636	int mp3_get_offset(void)\r
	637	{\r
	638	int offs1024 = 0;\r
	639	int cdda_on;\r
	640	\r
1cd356a3	641	cdda_on = (PicoMCD & 1) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r
abe0ea43	642	(Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r
75736070	643	\r
	644	if (cdda_on) {\r
	645	offs1024 = shared_ctl->mp3_offs << 7;\r
	646	offs1024 /= shared_ctl->mp3_len;\r
	647	offs1024 <<= 3;\r
	648	}\r
	649	printf("offs1024=%i (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r
	650	\r
	651	return offs1024;\r
	652	}\r
	653	\r
	654	\r