[libpicofe.git] / gp2x / 940ctl.c

// Code for communication with ARM940 and control of it.\r
// (c) Copyright 2007, Grazvydas "notaz" Ignotas\r
\r
#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 "../common/mp3.h"\r
#include "../common/arm_utils.h"\r
#include "../common/menu.h"\r
#include "../common/emu.h"\r
#include "../../Pico/PicoInt.h"\r
#include "../../Pico/sound/ym2612.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 (0x400000 + 0x800000) // 12M\r
#define CODE940_FILE "pico940_v2.bin"\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
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
\r
static int   dacen;\r
static INT32 dacout;\r
static UINT8 ST_address;	/* address register     */\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 = (ym2612_st->mode ^ v) & 0xc0;\r
	ym2612_st->mode = v;\r
\r
	/* reset Timer b flag */\r
	if( v & 0x20 )\r
		ym2612_st->status &= ~2;\r
\r
	/* reset Timer a flag */\r
	if( v & 0x10 )\r
		ym2612_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 = (ym2612_st->TA & 0x03)|(((int)v)<<2);\r
					if (ym2612_st->TA != TAnew) {\r
						// we should reset ticker only if new value is written. Outrun requires this.\r
						ym2612_st->TA = TAnew;\r
						ym2612_st->TAC = (1024-TAnew)*18;\r
						ym2612_st->TAT = 0;\r
					}\r
					return 0;\r
				}\r
			case 0x25: { // timer A Low 2\r
					int TAnew = (ym2612_st->TA & 0x3fc)|(v&3);\r
					if (ym2612_st->TA != TAnew) {\r
						ym2612_st->TA = TAnew;\r
						ym2612_st->TAC = (1024-TAnew)*18;\r
						ym2612_st->TAT = 0;\r
					}\r
					return 0;\r
				}\r
			case 0x26: // timer B\r
				if (ym2612_st->TB != v) {\r
					ym2612_st->TB = v;\r
					ym2612_st->TBC  = (256-v)<<4;\r
					ym2612_st->TBC *= 18;\r
					ym2612_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
\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, too much overclock?");\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
	/* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r
	add_job_940(JOB940_PICOSTATELOAD);\r
	if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r
\r
	writebuff_ptr = 0;\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
\r
\r
static void internal_reset(void)\r
{\r
	writebuff_ptr = 0;\r
	ym2612_st->mode   = 0;\r
	ym2612_st->status = 0;	/* normal mode */\r
	ym2612_st->TA     = 0;\r
	ym2612_st->TAC    = 0;\r
	ym2612_st->TAT    = 0;\r
	ym2612_st->TB     = 0;\r
	ym2612_st->TBC    = 0;\r
	ym2612_st->TBT    = 0;\r
	dacen     = 0;\r
	dacout    = 0;\r
	ST_address= 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, 0x2400000);\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_FILE);\r
\r
		fp = fopen(binpath, "rb");\r
		if(!fp)\r
		{\r
			memset(gp2x_screen, 0, 320*240*2);\r
			text_out16(10, 100, "failed to open required file:");\r
			text_out16(10, 110, CODE940_FILE);\r
			gp2x_video_flip2();\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
	/* cause local ym2612 to init REGS */\r
	YM2612Init_(baseclock, rate);\r
\r
	REGS = YM2612GetRegs();\r
	addr_A1 = (INT32 *) (REGS + 0x200);\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
	// playback was started, track not ended\r
	cdda_on = 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
		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("Warning: mp3 was 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
	unsigned int offs1024 = 0;\r
	int cdda_on;\r
\r
	cdda_on = (PicoAHW & PAHW_MCD) && (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  >> 3;\r
	}\r
	printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r
\r
	return offs1024;\r
}\r
\r
\r
Commit	Line	Data
6ab2f79c	1	// Code for communication with ARM940 and control of it.\r
	2	// (c) Copyright 2007, Grazvydas "notaz" Ignotas\r
	3	\r
720ee7f6	4	#include <stdio.h>\r
	5	#include <stdlib.h>\r
	6	#include <string.h>\r
	7	#include <unistd.h>\r
	8	#include <sys/mman.h>\r
	9	#include <sys/ioctl.h>\r
	10	#include <fcntl.h>\r
	11	#include <errno.h>\r
	12	\r
b30a8e67	13	#include "code940/940shared.h"\r
720ee7f6	14	#include "gp2x.h"\r
	15	#include "emu.h"\r
	16	#include "menu.h"\r
11f4e722	17	#include "../common/mp3.h"\r
c7a4ff64	18	#include "../common/arm_utils.h"\r
c7a4ff64	19	#include "../common/menu.h"\r
f013066e	20	#include "../common/emu.h"\r
598e7c06	21	#include "../../Pico/PicoInt.h"\r
31a77bde	22	#include "../../Pico/sound/ym2612.h"\r
49fe50f0	23	#include "../../Pico/sound/mix.h"\r
49fe50f0	24	\r
720ee7f6	25	/* we will need some gp2x internals here */\r
	26	extern volatile unsigned short gp2x_memregs; / from minimal library rlyeh */\r
	27	extern volatile unsigned long *gp2x_memregl;\r
	28	\r
8f1b51ef	29	extern int reset_timing;\r
720ee7f6	30	static unsigned char *shared_mem = 0;\r
720ee7f6	31	static _940_data_t *shared_data = 0;\r
edbb82f8	32	_940_ctl_t *shared_ctl = 0;\r
edbb82f8	33	unsigned char *mp3_mem = 0;\r
598e7c06	34	\r
60b4b403	35	#define MP3_SIZE_MAX (0x400000 + 0x800000) // 12M\r
91b2c3e1	36	#define CODE940_FILE "pico940_v2.bin"\r
720ee7f6	37	\r
	38	int crashed_940 = 0;\r
	39	\r
979ba09f	40	static FILE *loaded_mp3 = 0;\r
720ee7f6	41	\r
	42	/***********************************************************/\r
	43	\r
	44	#define MAXOUT (+32767)\r
	45	#define MINOUT (-32768)\r
	46	\r
	47	/* limitter */\r
	48	#define Limit(val, max,min) { \\r
	49	if ( val > max ) val = max; \\r
	50	else if ( val < min ) val = min; \\r
	51	}\r
	52	\r
	53	/* these will be managed locally on our side */\r
720ee7f6	54	static UINT8 REGS = 0; / we will also keep local copy of regs for savestates and such */\r
31a77bde	55	static INT32 addr_A1; / address line A1 */\r
	56	\r
	57	static int dacen;\r
720ee7f6	58	static INT32 dacout;\r
720ee7f6	59	static UINT8 ST_address; /* address register */\r
720ee7f6	60	\r
	61	static int writebuff_ptr = 0;\r
	62	\r
	63	\r
	64	/* OPN Mode Register Write */\r
79cad122	65	static int set_timers( int v )\r
720ee7f6	66	{\r
79cad122	67	int change;\r
79cad122	68	\r
720ee7f6	69	/* b7 = CSM MODE */\r
	70	/* b6 = 3 slot mode */\r
	71	/* b5 = reset b */\r
	72	/* b4 = reset a */\r
	73	/* b3 = timer enable b */\r
	74	/* b2 = timer enable a */\r
	75	/* b1 = load b */\r
	76	/* b0 = load a */\r
5ecedd0c	77	change = (ym2612_st->mode ^ v) & 0xc0;\r
5ecedd0c	78	ym2612_st->mode = v;\r
720ee7f6	79	\r
	80	/* reset Timer b flag */\r
	81	if( v & 0x20 )\r
5ecedd0c	82	ym2612_st->status &= ~2;\r
720ee7f6	83	\r
	84	/* reset Timer a flag */\r
	85	if( v & 0x10 )\r
5ecedd0c	86	ym2612_st->status &= ~1;\r
79cad122	87	\r
79cad122	88	return change;\r
720ee7f6	89	}\r
	90	\r
	91	/* YM2612 write */\r
	92	/* a = address */\r
	93	/* v = value */\r
	94	/* returns 1 if sample affecting state changed */\r
	95	int YM2612Write_940(unsigned int a, unsigned int v)\r
	96	{\r
79cad122	97	int addr;\r
79cad122	98	int upd = 1; /* the write affects sample generation */\r
720ee7f6	99	\r
	100	v &= 0xff; /* adjust to 8 bit bus */\r
	101	a &= 3;\r
	102	\r
79cad122	103	//printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r
79cad122	104	\r
720ee7f6	105	switch( a ) {\r
720ee7f6	106	case 0: /* address port 0 */\r
31a77bde	107	if (!*addr_A1 && ST_address == v)\r
d032c15a	108	return 0; /* address already selected, don't send this command to 940 */\r
720ee7f6	109	ST_address = v;\r
d032c15a	110	/* don't send DAC or timer related address changes to 940 */\r
31a77bde	111	if (!*addr_A1 && (v & 0xf0) == 0x20 &&\r
d032c15a	112	(v == 0x24 \|\| v == 0x25 \|\| v == 0x26 \|\| v == 0x2a))\r
d032c15a	113	return 0;\r
31a77bde	114	*addr_A1 = 0;\r
79cad122	115	upd = 0;\r
720ee7f6	116	break;\r
	117	\r
	118	case 1: /* data port 0 */\r
31a77bde	119	if (*addr_A1 != 0) {\r
720ee7f6	120	return 0; /* verified on real YM2608 */\r
	121	}\r
	122	\r
	123	addr = ST_address;\r
	124	REGS[addr] = v;\r
	125	\r
	126	switch( addr & 0xf0 )\r
	127	{\r
	128	case 0x20: /* 0x20-0x2f Mode */\r
	129	switch( addr )\r
	130	{\r
	131	case 0x24: { // timer A High 8\r
5ecedd0c	132	int TAnew = (ym2612_st->TA & 0x03)\|(((int)v)<<2);\r
5ecedd0c	133	if (ym2612_st->TA != TAnew) {\r
720ee7f6	134	// we should reset ticker only if new value is written. Outrun requires this.\r
5ecedd0c	135	ym2612_st->TA = TAnew;\r
	136	ym2612_st->TAC = (1024-TAnew)*18;\r
	137	ym2612_st->TAT = 0;\r
720ee7f6	138	}\r
	139	return 0;\r
	140	}\r
	141	case 0x25: { // timer A Low 2\r
5ecedd0c	142	int TAnew = (ym2612_st->TA & 0x3fc)\|(v&3);\r
	143	if (ym2612_st->TA != TAnew) {\r
	144	ym2612_st->TA = TAnew;\r
	145	ym2612_st->TAC = (1024-TAnew)*18;\r
	146	ym2612_st->TAT = 0;\r
720ee7f6	147	}\r
	148	return 0;\r
	149	}\r
	150	case 0x26: // timer B\r
5ecedd0c	151	if (ym2612_st->TB != v) {\r
	152	ym2612_st->TB = v;\r
	153	ym2612_st->TBC = (256-v)<<4;\r
	154	ym2612_st->TBC *= 18;\r
	155	ym2612_st->TBT = 0;\r
720ee7f6	156	}\r
	157	return 0;\r
	158	case 0x27: /* mode, timer control */\r
79cad122	159	if (set_timers( v ))\r
	160	break; // other side needs ST.mode for 3slot mode\r
	161	return 0;\r
720ee7f6	162	case 0x2a: /* DAC data (YM2612) */\r
	163	dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */\r
	164	return 0;\r
	165	case 0x2b: /* DAC Sel (YM2612) */\r
	166	/* b7 = dac enable */\r
	167	dacen = v & 0x80;\r
79cad122	168	upd = 0;\r
720ee7f6	169	break; // other side has to know this\r
	170	default:\r
	171	break;\r
	172	}\r
	173	break;\r
	174	}\r
	175	break;\r
	176	\r
	177	case 2: /* address port 1 */\r
31a77bde	178	if (*addr_A1 && ST_address == v)\r
d032c15a	179	return 0;\r
720ee7f6	180	ST_address = v;\r
31a77bde	181	*addr_A1 = 1;\r
79cad122	182	upd = 0;\r
720ee7f6	183	break;\r
	184	\r
	185	case 3: /* data port 1 */\r
31a77bde	186	if (*addr_A1 != 1) {\r
720ee7f6	187	return 0; /* verified on real YM2608 */\r
	188	}\r
	189	\r
	190	addr = ST_address \| 0x100;\r
	191	REGS[addr] = v;\r
	192	break;\r
	193	}\r
	194	\r
79cad122	195	//printf("ym pass\n");\r
79cad122	196	\r
720ee7f6	197	if(currentConfig.EmuOpt & 4) {\r
79cad122	198	UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r
	199	\r
	200	/* detect rapid ym updates */\r
	201	if (upd && !(writebuff_ptr & 0x80000000) && Pico.m.scanline < 224) {\r
	202	int mid = Pico.m.pal ? 68 : 93;\r
	203	if (Pico.m.scanline > mid) {\r
	204	//printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, Pico.m.scanline);\r
	205	writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r
	206	writebuff_ptr \|= 0x80000000;\r
	207	//printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, Pico.m.scanline, addr, v, upd);\r
720ee7f6	208	}\r
79cad122	209	}\r
	210	\r
	211	/* queue this write for 940 */\r
	212	if ((writebuff_ptr&0xffff) < 2047) {\r
	213	writebuff[writebuff_ptr++ & 0xffff] = (a<<8)\|v;\r
720ee7f6	214	} else {\r
d032c15a	215	printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r
720ee7f6	216	}\r
	217	}\r
	218	\r
	219	return 0; // cause the engine to do updates once per frame only\r
	220	}\r
	221	\r
720ee7f6	222	\r
edbb82f8	223	#define CHECK_BUSY(job) \\r
	224	(gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r
	225	\r
	226	static void wait_busy_940(int job)\r
720ee7f6	227	{\r
720ee7f6	228	int i;\r
720ee7f6	229	\r
edbb82f8	230	job--;\r
edbb82f8	231	for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r
b30a8e67	232	spend_cycles(8*1024); // tested to be best for mp3 dec\r
720ee7f6	233	if (i < 0x10000) return;\r
	234	\r
	235	/* 940 crashed */\r
b30a8e67	236	printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r
720ee7f6	237	for (i = 0; i < 8; i++)\r
	238	printf("%i ", shared_ctl->vstarts[i]);\r
	239	printf(")\n");\r
edbb82f8	240	printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
49fe50f0	241	gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
edbb82f8	242	printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
49fe50f0	243	printf("trying to interrupt..\n");\r
49fe50f0	244	gp2x_memregs[0x3B3E>>1] = 0xffff;\r
edbb82f8	245	for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r
49fe50f0	246	spend_cycles(8*1024);\r
49fe50f0	247	printf("i = 0x%x\n", i);\r
edbb82f8	248	printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
49fe50f0	249	gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
edbb82f8	250	printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
49fe50f0	251	\r
6ab2f79c	252	strcpy(menuErrorMsg, "940 crashed, too much overclock?");\r
720ee7f6	253	engineState = PGS_Menu;\r
720ee7f6	254	crashed_940 = 1;\r
720ee7f6	255	}\r
	256	\r
	257	\r
edbb82f8	258	static void add_job_940(int job)\r
720ee7f6	259	{\r
edbb82f8	260	if (job <= 0 \|\| job > 16) {\r
	261	printf("add_job_940: bad job: %i\n", job);\r
	262	return;\r
49fe50f0	263	}\r
edbb82f8	264	\r
	265	// generate interrupt for this job\r
	266	job--;\r
	267	gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r
	268	\r
	269	// printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r
720ee7f6	270	}\r
	271	\r
	272	\r
	273	void YM2612PicoStateLoad_940(void)\r
	274	{\r
31a77bde	275	int i, old_A1 = *addr_A1;\r
720ee7f6	276	\r
fb88e614	277	/* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r
	278	add_job_940(JOB940_PICOSTATELOAD);\r
	279	if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r
	280	\r
	281	writebuff_ptr = 0;\r
	282	\r
720ee7f6	283	// feed all the registers and update internal state\r
	284	for(i = 0; i < 0x100; i++) {\r
	285	YM2612Write_940(0, i);\r
	286	YM2612Write_940(1, REGS[i]);\r
	287	}\r
	288	for(i = 0; i < 0x100; i++) {\r
	289	YM2612Write_940(2, i);\r
	290	YM2612Write_940(3, REGS[i\|0x100]);\r
	291	}\r
	292	\r
31a77bde	293	*addr_A1 = old_A1;\r
720ee7f6	294	}\r
	295	\r
	296	\r
	297	static void internal_reset(void)\r
	298	{\r
	299	writebuff_ptr = 0;\r
5ecedd0c	300	ym2612_st->mode = 0;\r
	301	ym2612_st->status = 0; /* normal mode */\r
	302	ym2612_st->TA = 0;\r
	303	ym2612_st->TAC = 0;\r
	304	ym2612_st->TAT = 0;\r
	305	ym2612_st->TB = 0;\r
	306	ym2612_st->TBC = 0;\r
	307	ym2612_st->TBT = 0;\r
31a77bde	308	dacen = 0;\r
	309	dacout = 0;\r
	310	ST_address= 0;\r
720ee7f6	311	}\r
	312	\r
	313	\r
52d3dd5f	314	/* this must be called after mmu hack, the allocated regions must not get cached */\r
	315	void sharedmem_init(void)\r
	316	{\r
	317	if (shared_mem != NULL) return;\r
	318	\r
	319	shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r
	320	if(shared_mem == MAP_FAILED)\r
	321	{\r
	322	printf("mmap(shared_data) failed with %i\n", errno);\r
	323	exit(1);\r
	324	}\r
	325	shared_data = (_940_data_t *) (shared_mem+0x100000);\r
	326	/* this area must not get buffered on either side */\r
	327	shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r
60b4b403	328	mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r
52d3dd5f	329	if (mp3_mem == MAP_FAILED)\r
	330	{\r
	331	printf("mmap(mp3_mem) failed with %i\n", errno);\r
	332	exit(1);\r
	333	}\r
	334	crashed_940 = 1;\r
	335	}\r
	336	\r
	337	\r
4dfd9f42	338	void sharedmem_deinit(void)\r
	339	{\r
	340	munmap(shared_mem, 0x210000);\r
	341	munmap(mp3_mem, MP3_SIZE_MAX);\r
	342	shared_mem = mp3_mem = NULL;\r
	343	shared_data = NULL;\r
	344	shared_ctl = NULL;\r
	345	}\r
	346	\r
	347	\r
720ee7f6	348	extern char **g_argv;\r
	349	\r
	350	/* none of the functions in this file should be called before this one */\r
	351	void YM2612Init_940(int baseclock, int rate)\r
	352	{\r
	353	printf("YM2612Init_940()\n");\r
8dfb9fd5	354	printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(shared_data), sizeof(shared_ctl));\r
720ee7f6	355	\r
8dfb9fd5	356	Reset940(1, 2);\r
720ee7f6	357	Pause940(1);\r
720ee7f6	358	\r
49fe50f0	359	gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r
49fe50f0	360	gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r
720ee7f6	361	\r
edbb82f8	362	gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r
	363	gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r
	364	\r
	365	\r
720ee7f6	366	if (crashed_940)\r
	367	{\r
	368	unsigned char ucData[1024];\r
	369	int nRead, i, nLen = 0;\r
	370	char binpath[1024];\r
	371	FILE *fp;\r
	372	\r
	373	strncpy(binpath, g_argv[0], 1023);\r
	374	binpath[1023] = 0;\r
	375	for (i = strlen(binpath); i > 0; i--)\r
	376	if (binpath[i] == '/') { binpath[i] = 0; break; }\r
95151aea	377	strcat(binpath, "/" CODE940_FILE);\r
720ee7f6	378	\r
	379	fp = fopen(binpath, "rb");\r
	380	if(!fp)\r
	381	{\r
13059a60	382	memset(gp2x_screen, 0, 3202402);\r
	383	text_out16(10, 100, "failed to open required file:");\r
	384	text_out16(10, 110, CODE940_FILE);\r
	385	gp2x_video_flip2();\r
720ee7f6	386	printf("failed to open %s\n", binpath);\r
	387	exit(1);\r
	388	}\r
	389	\r
	390	while(1)\r
	391	{\r
	392	nRead = fread(ucData, 1, 1024, fp);\r
	393	if(nRead <= 0)\r
	394	break;\r
	395	memcpy(shared_mem + nLen, ucData, nRead);\r
	396	nLen += nRead;\r
	397	}\r
	398	fclose(fp);\r
	399	crashed_940 = 0;\r
	400	}\r
	401	\r
	402	memset(shared_data, 0, sizeof(*shared_data));\r
	403	memset(shared_ctl, 0, sizeof(*shared_ctl));\r
	404	\r
31a77bde	405	/* cause local ym2612 to init REGS */\r
	406	YM2612Init_(baseclock, rate);\r
	407	\r
720ee7f6	408	REGS = YM2612GetRegs();\r
31a77bde	409	addr_A1 = (INT32 *) (REGS + 0x200);\r
720ee7f6	410	\r
	411	ym2612_dacen = &dacen;\r
	412	ym2612_dacout = &dacout;\r
	413	\r
	414	internal_reset();\r
	415	\r
979ba09f	416	loaded_mp3 = 0;\r
979ba09f	417	\r
49fe50f0	418	gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r
edbb82f8	419	gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r
edbb82f8	420	gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r
720ee7f6	421	\r
720ee7f6	422	/* start the 940 */\r
8dfb9fd5	423	Reset940(0, 2);\r
720ee7f6	424	Pause940(0);\r
	425	\r
	426	// YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r
edbb82f8	427	\r
	428	/* now cause 940 to init it's ym2612 stuff */\r
	429	shared_ctl->baseclock = baseclock;\r
	430	shared_ctl->rate = rate;\r
	431	add_job_940(JOB940_INITALL);\r
720ee7f6	432	}\r
	433	\r
	434	\r
	435	void YM2612ResetChip_940(void)\r
	436	{\r
f76e88b5	437	//printf("YM2612ResetChip_940()\n");\r
720ee7f6	438	if (shared_data == NULL) {\r
	439	printf("YM2612ResetChip_940: reset before init?\n");\r
	440	return;\r
	441	}\r
	442	\r
720ee7f6	443	internal_reset();\r
720ee7f6	444	\r
edbb82f8	445	add_job_940(JOB940_YM2612RESETCHIP);\r
720ee7f6	446	}\r
	447	\r
	448	\r
edbb82f8	449	int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r
598e7c06	450	{\r
edbb82f8	451	int *ym_buf = shared_data->ym_buffer;\r
4dfd9f42	452	int ym_active_chs;\r
49fe50f0	453	\r
edbb82f8	454	//printf("YM2612UpdateOne_940()\n");\r
	455	\r
	456	if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
	457	\r
4dfd9f42	458	ym_active_chs = shared_ctl->ym_active_chs;\r
edbb82f8	459	\r
4dfd9f42	460	// mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r
	461	if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r
	462	else memset32(buffer, 0, length<<stereo);\r
edbb82f8	463	\r
edbb82f8	464	if (shared_ctl->writebuffsel == 1) {\r
79cad122	465	shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
49fe50f0	466	} else {\r
79cad122	467	shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
598e7c06	468	}\r
edbb82f8	469	writebuff_ptr = 0;\r
	470	\r
	471	/* predict sample counter for next frame */\r
	472	if (PsndLen_exc_add) {\r
	473	if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length = PsndLen + 1;\r
	474	else length = PsndLen;\r
	475	}\r
	476	\r
	477	/* give 940 ym job */\r
	478	shared_ctl->writebuffsel ^= 1;\r
	479	shared_ctl->length = length;\r
	480	shared_ctl->stereo = stereo;\r
	481	\r
	482	add_job_940(JOB940_YM2612UPDATEONE);\r
	483	\r
4dfd9f42	484	return ym_active_chs;\r
598e7c06	485	}\r
598e7c06	486	\r
598e7c06	487	\r
979ba09f	488	static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r
edbb82f8	489	static int mp3_play_bufsel = 0, mp3_job_started = 0;\r
598e7c06	490	\r
edbb82f8	491	void mp3_update(int *buffer, int length, int stereo)\r
720ee7f6	492	{\r
edbb82f8	493	int length_mp3;\r
edbb82f8	494	int cdda_on;\r
49fe50f0	495	\r
11f4e722	496	// playback was started, track not ended\r
11f4e722	497	cdda_on = loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r
720ee7f6	498	\r
edbb82f8	499	if (!cdda_on) return;\r
720ee7f6	500	\r
edbb82f8	501	if (!(PicoOpt&0x200)) {\r
	502	mp3_update_local(buffer, length, stereo);\r
	503	return;\r
	504	}\r
720ee7f6	505	\r
edbb82f8	506	length_mp3 = length;\r
	507	if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r
	508	else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r
49fe50f0	509	\r
edbb82f8	510	/* do we have to wait? */\r
	511	if (mp3_job_started && mp3_samples_ready < length_mp3) {\r
	512	if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
	513	mp3_job_started = 0;\r
	514	mp3_samples_ready += 1152;\r
	515	}\r
598e7c06	516	\r
49fe50f0	517	/* mix mp3 data, only stereo */\r
edbb82f8	518	if (mp3_samples_ready >= length_mp3)\r
598e7c06	519	{\r
49fe50f0	520	int shr = 0;\r
	521	void (mix_samples)(int dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r
	522	if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r
	523	else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r
598e7c06	524	\r
49fe50f0	525	if (1152 - mp3_buffer_offs >= length_mp3) {\r
edbb82f8	526	mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r
49fe50f0	527	\r
49fe50f0	528	mp3_buffer_offs += length_mp3;\r
598e7c06	529	} else {\r
edbb82f8	530	// collect samples from both buffers..\r
598e7c06	531	int left = 1152 - mp3_buffer_offs;\r
49fe50f0	532	if (mp3_play_bufsel == 0)\r
49fe50f0	533	{\r
edbb82f8	534	mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r
49fe50f0	535	mp3_buffer_offs = length_mp3 - left;\r
	536	mp3_play_bufsel = 1;\r
	537	} else {\r
	538	mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r
	539	mp3_buffer_offs = length_mp3 - left;\r
	540	mix_samples(buffer + ((left>>shr)<<1),\r
	541	shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r
	542	mp3_play_bufsel = 0;\r
	543	}\r
720ee7f6	544	}\r
49fe50f0	545	mp3_samples_ready -= length_mp3;\r
720ee7f6	546	}\r
720ee7f6	547	\r
edbb82f8	548	// ask to decode more if we already can\r
edbb82f8	549	if (!mp3_job_started)\r
598e7c06	550	{\r
edbb82f8	551	mp3_job_started = 1;\r
598e7c06	552	shared_ctl->mp3_buffsel ^= 1;\r
edbb82f8	553	add_job_940(JOB940_MP3DECODE);\r
598e7c06	554	}\r
720ee7f6	555	}\r
598e7c06	556	\r
	557	\r
	558	/***********************************************************/\r
	559	\r
	560	void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r
	561	{\r
	562	int byte_offs = 0;\r
	563	\r
7bc9cd7f	564	if (!(PicoOpt&0x800)) { // cdda disabled?\r
598e7c06	565	return;\r
	566	}\r
	567	\r
	568	if (loaded_mp3 != f)\r
	569	{\r
dfa4c846	570	if (PicoMessage != NULL)\r
	571	{\r
	572	fseek(f, 0, SEEK_END);\r
	573	if (ftell(f) > 210241024)\r
	574	PicoMessage("Loading MP3...");\r
	575	}\r
598e7c06	576	fseek(f, 0, SEEK_SET);\r
598e7c06	577	fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r
60b4b403	578	if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r
598e7c06	579	shared_ctl->mp3_len = ftell(f);\r
598e7c06	580	loaded_mp3 = f;\r
edbb82f8	581	\r
	582	if (PicoOpt&0x200) {\r
	583	// as we are going to change 940's cacheable area, we must invalidate it's cache..\r
	584	if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
	585	add_job_940(JOB940_INVALIDATE_DCACHE);\r
	586	}\r
8f1b51ef	587	reset_timing = 1;\r
598e7c06	588	}\r
	589	\r
	590	// seek..\r
	591	if (pos) {\r
	592	byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r
	593	byte_offs *= pos;\r
	594	byte_offs >>= 6;\r
	595	}\r
49fe50f0	596	// printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r
598e7c06	597	\r
598e7c06	598	shared_ctl->mp3_offs = byte_offs;\r
979ba09f	599	\r
edbb82f8	600	// reset buffer pointers and stuff..\r
979ba09f	601	mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r
edbb82f8	602	mp3_job_started = 0;\r
979ba09f	603	shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r
edbb82f8	604	\r
edbb82f8	605	if (!(PicoOpt&0x200)) mp3_start_local();\r
598e7c06	606	}\r
	607	\r
	608	\r
98c9d8d9	609	int mp3_get_offset(void)\r
98c9d8d9	610	{\r
11f4e722	611	unsigned int offs1024 = 0;\r
98c9d8d9	612	int cdda_on;\r
98c9d8d9	613	\r
dd5fd477	614	cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r
edbb82f8	615	(Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r
98c9d8d9	616	\r
	617	if (cdda_on) {\r
	618	offs1024 = shared_ctl->mp3_offs << 7;\r
11f4e722	619	offs1024 /= shared_ctl->mp3_len >> 3;\r
98c9d8d9	620	}\r
11f4e722	621	printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r
98c9d8d9	622	\r
	623	return offs1024;\r
	624	}\r
	625	\r
	626	\r