[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_v3.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 ST_address;	/* address register     */\r
static INT32 addr_A1;		/* address line A1      */\r
\r
static int   writebuff_ptr = 0;\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, int scanline)\r
{\r
	int upd = 1;	/* the write affects sample generation */\r
\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
	{\r
		case 0:	/* address port 0 */\r
			if (addr_A1 == 0 && ST_address == v)\r
				return 0; /* address already selected, don't send this command to 940 */\r
			ST_address = v;\r
			addr_A1 = 0;\r
			/* don't send DAC or timer related address changes to 940 */\r
			if (v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a)\r
				return 0;\r
			upd = 0;\r
			break;\r
\r
		case 1:	/* data port 0    */\r
			if (ST_address == 0x2b) upd = 0; /* DAC sel */\r
			break;\r
\r
		case 2:	/* address port 1 */\r
			if (addr_A1 == 1 && ST_address == v)\r
				return 0;\r
			ST_address = v;\r
			addr_A1 = 1;\r
			upd = 0;\r
			break;\r
	}\r
\r
	//printf("ym pass\n");\r
\r
	if (currentConfig.EmuOpt & 4)\r
	{\r
		UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r
\r
		/* detect rapid ym updates */\r
		if (upd && !(writebuff_ptr & 0x80000000) && scanline < 224)\r
		{\r
			int mid = Pico.m.pal ? 68 : 93;\r
			if (scanline > mid) {\r
				//printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, 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, 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
	UINT8 *REGS = YM2612GetRegs();\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
	addr_A1 = *(INT32 *) (REGS + 0x200);\r
}\r
\r
void YM2612PicoStateSave2_940(int tat, int tbt)\r
{\r
	UINT8 *ym_remote_regs, *ym_local_regs;\r
	add_job_940(JOB940_PICOSTATESAVE2);\r
	if (CHECK_BUSY(JOB940_PICOSTATESAVE2)) wait_busy_940(JOB940_PICOSTATESAVE2);\r
\r
	ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
	ym_local_regs  = YM2612GetRegs();\r
	if (*(UINT32 *)(ym_remote_regs + 0x100) != 0x41534d59) {\r
		printf("code940 didn't return valid save data\n");\r
		return;\r
	}\r
\r
	/* copy addin data only */\r
	memcpy(ym_local_regs,         ym_remote_regs,         0x20);\r
	memcpy(ym_local_regs + 0x100, ym_remote_regs + 0x100, 0x30);\r
	memcpy(ym_local_regs + 0x0b8, ym_remote_regs + 0x0b8, 0x48);\r
	memcpy(ym_local_regs + 0x1b8, ym_remote_regs + 0x1b8, 0x48);\r
	*(INT32 *)(ym_local_regs + 0x108) = tat;\r
	*(INT32 *)(ym_local_regs + 0x10c) = tbt;\r
}\r
\r
int YM2612PicoStateLoad2_940(int *tat, int *tbt)\r
{\r
	UINT8 *ym_remote_regs, *ym_local_regs;\r
	ym_local_regs  = YM2612GetRegs();\r
	ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
\r
	if (*(UINT32 *)(ym_local_regs + 0x100) != 0x41534d59)\r
		return -1;\r
\r
	*tat = *(INT32 *)(ym_local_regs + 0x108);\r
	*tbt = *(INT32 *)(ym_local_regs + 0x10c);\r
\r
	if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
\r
	/* flush writes */\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
	shared_ctl->writebuffsel ^= 1;\r
	writebuff_ptr = 0;\r
	add_job_940(JOB940_PICOSTATELOAD2_PREP);\r
	if (CHECK_BUSY(JOB940_PICOSTATELOAD2_PREP)) wait_busy_940(JOB940_PICOSTATELOAD2_PREP);\r
\r
	memcpy(ym_remote_regs, ym_local_regs, 0x200);\r
\r
	add_job_940(JOB940_PICOSTATELOAD2);\r
	if (CHECK_BUSY(JOB940_PICOSTATELOAD2)) wait_busy_940(JOB940_PICOSTATELOAD2);\r
\r
	return 0;\r
}\r
\r
\r
static void internal_reset(void)\r
{\r
	writebuff_ptr = 0;\r
	ST_address = addr_A1 = -1;\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
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
	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
	YM2612ResetChip_();\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
389aa76e	36	#define CODE940_FILE "pico940_v3.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 ST_address; /* address register */\r
7481dd3a	55	static INT32 addr_A1; /* address line A1 */\r
720ee7f6	56	\r
	57	static int writebuff_ptr = 0;\r
	58	\r
	59	\r
720ee7f6	60	/* YM2612 write */\r
	61	/* a = address */\r
	62	/* v = value */\r
	63	/* returns 1 if sample affecting state changed */\r
7481dd3a	64	int YM2612Write_940(unsigned int a, unsigned int v, int scanline)\r
720ee7f6	65	{\r
79cad122	66	int upd = 1; /* the write affects sample generation */\r
720ee7f6	67	\r
720ee7f6	68	a &= 3;\r
720ee7f6	69	\r
79cad122	70	//printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r
79cad122	71	\r
389aa76e	72	switch (a)\r
389aa76e	73	{\r
7481dd3a	74	case 0: /* address port 0 */\r
	75	if (addr_A1 == 0 && ST_address == v)\r
	76	return 0; /* address already selected, don't send this command to 940 */\r
	77	ST_address = v;\r
	78	addr_A1 = 0;\r
	79	/* don't send DAC or timer related address changes to 940 */\r
	80	if (v == 0x24 \|\| v == 0x25 \|\| v == 0x26 \|\| v == 0x2a)\r
d032c15a	81	return 0;\r
7481dd3a	82	upd = 0;\r
7481dd3a	83	break;\r
720ee7f6	84	\r
7481dd3a	85	case 1: /* data port 0 */\r
	86	if (ST_address == 0x2b) upd = 0; /* DAC sel */\r
	87	break;\r
720ee7f6	88	\r
7481dd3a	89	case 2: /* address port 1 */\r
7481dd3a	90	if (addr_A1 == 1 && ST_address == v)\r
720ee7f6	91	return 0;\r
7481dd3a	92	ST_address = v;\r
	93	addr_A1 = 1;\r
	94	upd = 0;\r
720ee7f6	95	break;\r
720ee7f6	96	}\r
720ee7f6	97	\r
79cad122	98	//printf("ym pass\n");\r
79cad122	99	\r
7481dd3a	100	if (currentConfig.EmuOpt & 4)\r
7481dd3a	101	{\r
79cad122	102	UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r
	103	\r
	104	/* detect rapid ym updates */\r
7481dd3a	105	if (upd && !(writebuff_ptr & 0x80000000) && scanline < 224)\r
7481dd3a	106	{\r
79cad122	107	int mid = Pico.m.pal ? 68 : 93;\r
7481dd3a	108	if (scanline > mid) {\r
7481dd3a	109	//printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, scanline);\r
79cad122	110	writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r
79cad122	111	writebuff_ptr \|= 0x80000000;\r
7481dd3a	112	//printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, scanline, addr, v, upd);\r
720ee7f6	113	}\r
79cad122	114	}\r
	115	\r
	116	/* queue this write for 940 */\r
	117	if ((writebuff_ptr&0xffff) < 2047) {\r
	118	writebuff[writebuff_ptr++ & 0xffff] = (a<<8)\|v;\r
720ee7f6	119	} else {\r
d032c15a	120	printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r
720ee7f6	121	}\r
	122	}\r
	123	\r
	124	return 0; // cause the engine to do updates once per frame only\r
	125	}\r
	126	\r
720ee7f6	127	\r
edbb82f8	128	#define CHECK_BUSY(job) \\r
	129	(gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r
	130	\r
	131	static void wait_busy_940(int job)\r
720ee7f6	132	{\r
720ee7f6	133	int i;\r
720ee7f6	134	\r
edbb82f8	135	job--;\r
edbb82f8	136	for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r
b30a8e67	137	spend_cycles(8*1024); // tested to be best for mp3 dec\r
720ee7f6	138	if (i < 0x10000) return;\r
	139	\r
	140	/* 940 crashed */\r
b30a8e67	141	printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r
720ee7f6	142	for (i = 0; i < 8; i++)\r
	143	printf("%i ", shared_ctl->vstarts[i]);\r
	144	printf(")\n");\r
edbb82f8	145	printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
49fe50f0	146	gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
edbb82f8	147	printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
49fe50f0	148	printf("trying to interrupt..\n");\r
49fe50f0	149	gp2x_memregs[0x3B3E>>1] = 0xffff;\r
edbb82f8	150	for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r
49fe50f0	151	spend_cycles(8*1024);\r
49fe50f0	152	printf("i = 0x%x\n", i);\r
edbb82f8	153	printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
49fe50f0	154	gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
edbb82f8	155	printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
49fe50f0	156	\r
6ab2f79c	157	strcpy(menuErrorMsg, "940 crashed, too much overclock?");\r
720ee7f6	158	engineState = PGS_Menu;\r
720ee7f6	159	crashed_940 = 1;\r
720ee7f6	160	}\r
	161	\r
	162	\r
edbb82f8	163	static void add_job_940(int job)\r
720ee7f6	164	{\r
edbb82f8	165	if (job <= 0 \|\| job > 16) {\r
	166	printf("add_job_940: bad job: %i\n", job);\r
	167	return;\r
49fe50f0	168	}\r
edbb82f8	169	\r
	170	// generate interrupt for this job\r
	171	job--;\r
	172	gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r
	173	\r
	174	// printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r
720ee7f6	175	}\r
	176	\r
	177	\r
	178	void YM2612PicoStateLoad_940(void)\r
	179	{\r
7481dd3a	180	UINT8 *REGS = YM2612GetRegs();\r
7481dd3a	181	\r
fb88e614	182	/* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r
	183	add_job_940(JOB940_PICOSTATELOAD);\r
	184	if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r
	185	\r
	186	writebuff_ptr = 0;\r
7481dd3a	187	addr_A1 = (INT32 ) (REGS + 0x200);\r
720ee7f6	188	}\r
720ee7f6	189	\r
389aa76e	190	void YM2612PicoStateSave2_940(int tat, int tbt)\r
	191	{\r
	192	UINT8 ym_remote_regs, ym_local_regs;\r
	193	add_job_940(JOB940_PICOSTATESAVE2);\r
	194	if (CHECK_BUSY(JOB940_PICOSTATESAVE2)) wait_busy_940(JOB940_PICOSTATESAVE2);\r
	195	\r
	196	ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
	197	ym_local_regs = YM2612GetRegs();\r
	198	if ((UINT32 )(ym_remote_regs + 0x100) != 0x41534d59) {\r
	199	printf("code940 didn't return valid save data\n");\r
	200	return;\r
	201	}\r
	202	\r
	203	/* copy addin data only */\r
	204	memcpy(ym_local_regs, ym_remote_regs, 0x20);\r
	205	memcpy(ym_local_regs + 0x100, ym_remote_regs + 0x100, 0x30);\r
	206	memcpy(ym_local_regs + 0x0b8, ym_remote_regs + 0x0b8, 0x48);\r
	207	memcpy(ym_local_regs + 0x1b8, ym_remote_regs + 0x1b8, 0x48);\r
	208	(INT32 )(ym_local_regs + 0x108) = tat;\r
	209	(INT32 )(ym_local_regs + 0x10c) = tbt;\r
	210	}\r
	211	\r
	212	int YM2612PicoStateLoad2_940(int tat, int tbt)\r
	213	{\r
	214	UINT8 ym_remote_regs, ym_local_regs;\r
	215	ym_local_regs = YM2612GetRegs();\r
	216	ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
	217	\r
	218	if ((UINT32 )(ym_local_regs + 0x100) != 0x41534d59)\r
	219	return -1;\r
	220	\r
	221	tat = (INT32 *)(ym_local_regs + 0x108);\r
	222	tbt = (INT32 *)(ym_local_regs + 0x10c);\r
	223	\r
	224	if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
	225	\r
	226	/* flush writes */\r
	227	if (shared_ctl->writebuffsel == 1) {\r
	228	shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
	229	} else {\r
	230	shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
	231	}\r
	232	shared_ctl->writebuffsel ^= 1;\r
	233	writebuff_ptr = 0;\r
	234	add_job_940(JOB940_PICOSTATELOAD2_PREP);\r
	235	if (CHECK_BUSY(JOB940_PICOSTATELOAD2_PREP)) wait_busy_940(JOB940_PICOSTATELOAD2_PREP);\r
	236	\r
	237	memcpy(ym_remote_regs, ym_local_regs, 0x200);\r
	238	\r
	239	add_job_940(JOB940_PICOSTATELOAD2);\r
	240	if (CHECK_BUSY(JOB940_PICOSTATELOAD2)) wait_busy_940(JOB940_PICOSTATELOAD2);\r
	241	\r
	242	return 0;\r
	243	}\r
	244	\r
720ee7f6	245	\r
	246	static void internal_reset(void)\r
	247	{\r
	248	writebuff_ptr = 0;\r
7481dd3a	249	ST_address = addr_A1 = -1;\r
720ee7f6	250	}\r
	251	\r
	252	\r
52d3dd5f	253	/* this must be called after mmu hack, the allocated regions must not get cached */\r
	254	void sharedmem_init(void)\r
	255	{\r
	256	if (shared_mem != NULL) return;\r
	257	\r
	258	shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r
389aa76e	259	if (shared_mem == MAP_FAILED)\r
52d3dd5f	260	{\r
	261	printf("mmap(shared_data) failed with %i\n", errno);\r
	262	exit(1);\r
	263	}\r
	264	shared_data = (_940_data_t *) (shared_mem+0x100000);\r
	265	/* this area must not get buffered on either side */\r
	266	shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r
60b4b403	267	mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r
52d3dd5f	268	if (mp3_mem == MAP_FAILED)\r
	269	{\r
	270	printf("mmap(mp3_mem) failed with %i\n", errno);\r
	271	exit(1);\r
	272	}\r
	273	crashed_940 = 1;\r
	274	}\r
	275	\r
	276	\r
4dfd9f42	277	void sharedmem_deinit(void)\r
	278	{\r
	279	munmap(shared_mem, 0x210000);\r
	280	munmap(mp3_mem, MP3_SIZE_MAX);\r
	281	shared_mem = mp3_mem = NULL;\r
	282	shared_data = NULL;\r
	283	shared_ctl = NULL;\r
	284	}\r
	285	\r
	286	\r
720ee7f6	287	extern char **g_argv;\r
720ee7f6	288	\r
720ee7f6	289	void YM2612Init_940(int baseclock, int rate)\r
	290	{\r
	291	printf("YM2612Init_940()\n");\r
8dfb9fd5	292	printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(shared_data), sizeof(shared_ctl));\r
720ee7f6	293	\r
8dfb9fd5	294	Reset940(1, 2);\r
720ee7f6	295	Pause940(1);\r
720ee7f6	296	\r
49fe50f0	297	gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r
49fe50f0	298	gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r
720ee7f6	299	\r
edbb82f8	300	gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r
	301	gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r
	302	\r
	303	\r
720ee7f6	304	if (crashed_940)\r
	305	{\r
	306	unsigned char ucData[1024];\r
	307	int nRead, i, nLen = 0;\r
	308	char binpath[1024];\r
	309	FILE *fp;\r
	310	\r
	311	strncpy(binpath, g_argv[0], 1023);\r
	312	binpath[1023] = 0;\r
	313	for (i = strlen(binpath); i > 0; i--)\r
	314	if (binpath[i] == '/') { binpath[i] = 0; break; }\r
95151aea	315	strcat(binpath, "/" CODE940_FILE);\r
720ee7f6	316	\r
	317	fp = fopen(binpath, "rb");\r
	318	if(!fp)\r
	319	{\r
13059a60	320	memset(gp2x_screen, 0, 3202402);\r
	321	text_out16(10, 100, "failed to open required file:");\r
	322	text_out16(10, 110, CODE940_FILE);\r
	323	gp2x_video_flip2();\r
720ee7f6	324	printf("failed to open %s\n", binpath);\r
	325	exit(1);\r
	326	}\r
	327	\r
	328	while(1)\r
	329	{\r
	330	nRead = fread(ucData, 1, 1024, fp);\r
	331	if(nRead <= 0)\r
	332	break;\r
	333	memcpy(shared_mem + nLen, ucData, nRead);\r
	334	nLen += nRead;\r
	335	}\r
	336	fclose(fp);\r
	337	crashed_940 = 0;\r
	338	}\r
	339	\r
	340	memset(shared_data, 0, sizeof(*shared_data));\r
	341	memset(shared_ctl, 0, sizeof(*shared_ctl));\r
	342	\r
31a77bde	343	/* cause local ym2612 to init REGS */\r
	344	YM2612Init_(baseclock, rate);\r
	345	\r
720ee7f6	346	internal_reset();\r
720ee7f6	347	\r
979ba09f	348	loaded_mp3 = 0;\r
979ba09f	349	\r
49fe50f0	350	gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r
edbb82f8	351	gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r
edbb82f8	352	gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r
720ee7f6	353	\r
720ee7f6	354	/* start the 940 */\r
8dfb9fd5	355	Reset940(0, 2);\r
720ee7f6	356	Pause940(0);\r
	357	\r
	358	// YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r
edbb82f8	359	\r
	360	/* now cause 940 to init it's ym2612 stuff */\r
	361	shared_ctl->baseclock = baseclock;\r
	362	shared_ctl->rate = rate;\r
	363	add_job_940(JOB940_INITALL);\r
720ee7f6	364	}\r
	365	\r
	366	\r
	367	void YM2612ResetChip_940(void)\r
	368	{\r
f76e88b5	369	//printf("YM2612ResetChip_940()\n");\r
720ee7f6	370	if (shared_data == NULL) {\r
	371	printf("YM2612ResetChip_940: reset before init?\n");\r
	372	return;\r
	373	}\r
	374	\r
7481dd3a	375	YM2612ResetChip_();\r
720ee7f6	376	internal_reset();\r
720ee7f6	377	\r
edbb82f8	378	add_job_940(JOB940_YM2612RESETCHIP);\r
720ee7f6	379	}\r
	380	\r
	381	\r
edbb82f8	382	int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r
598e7c06	383	{\r
edbb82f8	384	int *ym_buf = shared_data->ym_buffer;\r
4dfd9f42	385	int ym_active_chs;\r
49fe50f0	386	\r
edbb82f8	387	//printf("YM2612UpdateOne_940()\n");\r
	388	\r
	389	if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
	390	\r
4dfd9f42	391	ym_active_chs = shared_ctl->ym_active_chs;\r
edbb82f8	392	\r
4dfd9f42	393	// mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r
	394	if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r
	395	else memset32(buffer, 0, length<<stereo);\r
edbb82f8	396	\r
edbb82f8	397	if (shared_ctl->writebuffsel == 1) {\r
79cad122	398	shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
49fe50f0	399	} else {\r
79cad122	400	shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
598e7c06	401	}\r
edbb82f8	402	writebuff_ptr = 0;\r
	403	\r
	404	/* predict sample counter for next frame */\r
	405	if (PsndLen_exc_add) {\r
	406	if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length = PsndLen + 1;\r
	407	else length = PsndLen;\r
	408	}\r
	409	\r
	410	/* give 940 ym job */\r
	411	shared_ctl->writebuffsel ^= 1;\r
	412	shared_ctl->length = length;\r
	413	shared_ctl->stereo = stereo;\r
	414	\r
	415	add_job_940(JOB940_YM2612UPDATEONE);\r
	416	\r
4dfd9f42	417	return ym_active_chs;\r
598e7c06	418	}\r
598e7c06	419	\r
598e7c06	420	\r
979ba09f	421	static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r
edbb82f8	422	static int mp3_play_bufsel = 0, mp3_job_started = 0;\r
598e7c06	423	\r
edbb82f8	424	void mp3_update(int *buffer, int length, int stereo)\r
720ee7f6	425	{\r
edbb82f8	426	int length_mp3;\r
edbb82f8	427	int cdda_on;\r
49fe50f0	428	\r
11f4e722	429	// playback was started, track not ended\r
11f4e722	430	cdda_on = loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r
720ee7f6	431	\r
edbb82f8	432	if (!cdda_on) return;\r
720ee7f6	433	\r
edbb82f8	434	if (!(PicoOpt&0x200)) {\r
	435	mp3_update_local(buffer, length, stereo);\r
	436	return;\r
	437	}\r
720ee7f6	438	\r
edbb82f8	439	length_mp3 = length;\r
	440	if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r
	441	else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r
49fe50f0	442	\r
edbb82f8	443	/* do we have to wait? */\r
	444	if (mp3_job_started && mp3_samples_ready < length_mp3) {\r
	445	if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
	446	mp3_job_started = 0;\r
	447	mp3_samples_ready += 1152;\r
	448	}\r
598e7c06	449	\r
49fe50f0	450	/* mix mp3 data, only stereo */\r
edbb82f8	451	if (mp3_samples_ready >= length_mp3)\r
598e7c06	452	{\r
49fe50f0	453	int shr = 0;\r
	454	void (mix_samples)(int dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r
	455	if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r
	456	else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r
598e7c06	457	\r
49fe50f0	458	if (1152 - mp3_buffer_offs >= length_mp3) {\r
edbb82f8	459	mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r
49fe50f0	460	\r
49fe50f0	461	mp3_buffer_offs += length_mp3;\r
598e7c06	462	} else {\r
edbb82f8	463	// collect samples from both buffers..\r
598e7c06	464	int left = 1152 - mp3_buffer_offs;\r
49fe50f0	465	if (mp3_play_bufsel == 0)\r
49fe50f0	466	{\r
edbb82f8	467	mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r
49fe50f0	468	mp3_buffer_offs = length_mp3 - left;\r
	469	mp3_play_bufsel = 1;\r
	470	} else {\r
	471	mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r
	472	mp3_buffer_offs = length_mp3 - left;\r
	473	mix_samples(buffer + ((left>>shr)<<1),\r
	474	shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r
	475	mp3_play_bufsel = 0;\r
	476	}\r
720ee7f6	477	}\r
49fe50f0	478	mp3_samples_ready -= length_mp3;\r
720ee7f6	479	}\r
720ee7f6	480	\r
edbb82f8	481	// ask to decode more if we already can\r
edbb82f8	482	if (!mp3_job_started)\r
598e7c06	483	{\r
edbb82f8	484	mp3_job_started = 1;\r
598e7c06	485	shared_ctl->mp3_buffsel ^= 1;\r
edbb82f8	486	add_job_940(JOB940_MP3DECODE);\r
598e7c06	487	}\r
720ee7f6	488	}\r
598e7c06	489	\r
	490	\r
	491	/***********************************************************/\r
	492	\r
	493	void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r
	494	{\r
	495	int byte_offs = 0;\r
	496	\r
7bc9cd7f	497	if (!(PicoOpt&0x800)) { // cdda disabled?\r
598e7c06	498	return;\r
	499	}\r
	500	\r
	501	if (loaded_mp3 != f)\r
	502	{\r
dfa4c846	503	if (PicoMessage != NULL)\r
	504	{\r
	505	fseek(f, 0, SEEK_END);\r
	506	if (ftell(f) > 210241024)\r
	507	PicoMessage("Loading MP3...");\r
	508	}\r
598e7c06	509	fseek(f, 0, SEEK_SET);\r
598e7c06	510	fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r
60b4b403	511	if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r
598e7c06	512	shared_ctl->mp3_len = ftell(f);\r
598e7c06	513	loaded_mp3 = f;\r
edbb82f8	514	\r
	515	if (PicoOpt&0x200) {\r
	516	// as we are going to change 940's cacheable area, we must invalidate it's cache..\r
	517	if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
	518	add_job_940(JOB940_INVALIDATE_DCACHE);\r
	519	}\r
8f1b51ef	520	reset_timing = 1;\r
598e7c06	521	}\r
	522	\r
	523	// seek..\r
	524	if (pos) {\r
	525	byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r
	526	byte_offs *= pos;\r
	527	byte_offs >>= 6;\r
	528	}\r
49fe50f0	529	// printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r
598e7c06	530	\r
598e7c06	531	shared_ctl->mp3_offs = byte_offs;\r
979ba09f	532	\r
edbb82f8	533	// reset buffer pointers and stuff..\r
979ba09f	534	mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r
edbb82f8	535	mp3_job_started = 0;\r
979ba09f	536	shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r
edbb82f8	537	\r
edbb82f8	538	if (!(PicoOpt&0x200)) mp3_start_local();\r
598e7c06	539	}\r
	540	\r
	541	\r
98c9d8d9	542	int mp3_get_offset(void)\r
98c9d8d9	543	{\r
11f4e722	544	unsigned int offs1024 = 0;\r
98c9d8d9	545	int cdda_on;\r
98c9d8d9	546	\r
dd5fd477	547	cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r
edbb82f8	548	(Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r
98c9d8d9	549	\r
	550	if (cdda_on) {\r
	551	offs1024 = shared_ctl->mp3_offs << 7;\r
11f4e722	552	offs1024 /= shared_ctl->mp3_len >> 3;\r
98c9d8d9	553	}\r
11f4e722	554	printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r
98c9d8d9	555	\r
	556	return offs1024;\r
	557	}\r
	558	\r
	559	\r