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