[picodrive.git] / platform / 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 "soc_mmsp2.h"\r
#include "soc.h"\r
#include "../common/mp3.h"\r
#include "../common/arm_utils.h"\r
#include "../common/menu.h"\r
#include "../common/emu.h"\r
#include "../common/input.h"\r
#include "../../pico/pico_int.h"\r
#include "../../pico/sound/ym2612.h"\r
#include "../../pico/sound/mix.h"\r
\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 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
	me_update_msg("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 sharedmem940_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 sharedmem940_finish(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, nLen = 0;\r
		char binpath[512];\r
		FILE *fp;\r
\r
		emu_make_path(binpath, CODE940_FILE, sizeof(binpath));\r
		fp = fopen(binpath, "rb");\r
		if(!fp)\r
		{\r
			memset(g_screen_ptr, 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
			in_menu_wait(PBTN_MOK|PBTN_MBACK, 100);\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
		length = PsndLen;\r
		if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length++;\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 & POPT_EXT_FM) {\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 & POPT_EXT_FM)\r
	{\r
		add_job_940(JOB940_MP3RESET);\r
		if (CHECK_BUSY(JOB940_MP3RESET)) wait_busy_940(JOB940_MP3RESET);\r
	}\r
	else\r
		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
6cadc2da	1	// Code for communication with ARM940 and control of it.\r
	2	// (c) Copyright 2007, Grazvydas "notaz" Ignotas\r
	3	\r
cc68a136	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
42c7b147	13	#include "code940/940shared.h"\r
42171343	14	#include "soc_mmsp2.h"\r
42171343	15	#include "soc.h"\r
da42200b	16	#include "../common/mp3.h"\r
e5f426aa	17	#include "../common/arm_utils.h"\r
e5f426aa	18	#include "../common/menu.h"\r
ea8c405f	19	#include "../common/emu.h"\r
cc41eb4f	20	#include "../common/input.h"\r
efcba75f	21	#include "../../pico/pico_int.h"\r
	22	#include "../../pico/sound/ym2612.h"\r
	23	#include "../../pico/sound/mix.h"\r
4f265db7	24	\r
cc68a136	25	static unsigned char *shared_mem = 0;\r
cc68a136	26	static _940_data_t *shared_data = 0;\r
abe0ea43	27	_940_ctl_t *shared_ctl = 0;\r
abe0ea43	28	unsigned char *mp3_mem = 0;\r
cb0316e4	29	\r
e362c573	30	#define MP3_SIZE_MAX (0x400000 + 0x800000) // 12M\r
e4fb433c	31	#define CODE940_FILE "pico940_v3.bin"\r
cc68a136	32	\r
	33	int crashed_940 = 0;\r
	34	\r
51a902ae	35	static FILE *loaded_mp3 = 0;\r
cc68a136	36	\r
	37	/***********************************************************/\r
	38	\r
	39	#define MAXOUT (+32767)\r
	40	#define MINOUT (-32768)\r
	41	\r
	42	/* limitter */\r
	43	#define Limit(val, max,min) { \\r
	44	if ( val > max ) val = max; \\r
	45	else if ( val < min ) val = min; \\r
	46	}\r
	47	\r
	48	/* these will be managed locally on our side */\r
cc68a136	49	static UINT8 ST_address; /* address register */\r
4b9c5888	50	static INT32 addr_A1; /* address line A1 */\r
cc68a136	51	\r
	52	static int writebuff_ptr = 0;\r
	53	\r
	54	\r
cc68a136	55	/* YM2612 write */\r
	56	/* a = address */\r
	57	/* v = value */\r
	58	/* returns 1 if sample affecting state changed */\r
4b9c5888	59	int YM2612Write_940(unsigned int a, unsigned int v, int scanline)\r
cc68a136	60	{\r
2433f409	61	int upd = 1; /* the write affects sample generation */\r
cc68a136	62	\r
cc68a136	63	a &= 3;\r
cc68a136	64	\r
2433f409	65	//printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r
2433f409	66	\r
e4fb433c	67	switch (a)\r
e4fb433c	68	{\r
4b9c5888	69	case 0: /* address port 0 */\r
	70	if (addr_A1 == 0 && ST_address == v)\r
	71	return 0; /* address already selected, don't send this command to 940 */\r
	72	ST_address = v;\r
	73	addr_A1 = 0;\r
	74	/* don't send DAC or timer related address changes to 940 */\r
	75	if (v == 0x24 \|\| v == 0x25 \|\| v == 0x26 \|\| v == 0x2a)\r
4ff2d527	76	return 0;\r
4b9c5888	77	upd = 0;\r
4b9c5888	78	break;\r
cc68a136	79	\r
4b9c5888	80	case 2: /* address port 1 */\r
4b9c5888	81	if (addr_A1 == 1 && ST_address == v)\r
cc68a136	82	return 0;\r
4b9c5888	83	ST_address = v;\r
	84	addr_A1 = 1;\r
	85	upd = 0;\r
cc68a136	86	break;\r
cc68a136	87	}\r
cc68a136	88	\r
2433f409	89	//printf("ym pass\n");\r
2433f409	90	\r
4b9c5888	91	if (currentConfig.EmuOpt & 4)\r
4b9c5888	92	{\r
2433f409	93	UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r
	94	\r
	95	/* detect rapid ym updates */\r
4b9c5888	96	if (upd && !(writebuff_ptr & 0x80000000) && scanline < 224)\r
4b9c5888	97	{\r
2433f409	98	int mid = Pico.m.pal ? 68 : 93;\r
4b9c5888	99	if (scanline > mid) {\r
4b9c5888	100	//printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, scanline);\r
2433f409	101	writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r
2433f409	102	writebuff_ptr \|= 0x80000000;\r
4b9c5888	103	//printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, scanline, addr, v, upd);\r
cc68a136	104	}\r
2433f409	105	}\r
	106	\r
	107	/* queue this write for 940 */\r
	108	if ((writebuff_ptr&0xffff) < 2047) {\r
	109	writebuff[writebuff_ptr++ & 0xffff] = (a<<8)\|v;\r
cc68a136	110	} else {\r
4ff2d527	111	printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r
cc68a136	112	}\r
	113	}\r
	114	\r
	115	return 0; // cause the engine to do updates once per frame only\r
	116	}\r
	117	\r
cc68a136	118	\r
abe0ea43	119	#define CHECK_BUSY(job) \\r
	120	(gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r
	121	\r
	122	static void wait_busy_940(int job)\r
cc68a136	123	{\r
cc68a136	124	int i;\r
cc68a136	125	\r
abe0ea43	126	job--;\r
abe0ea43	127	for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r
42c7b147	128	spend_cycles(8*1024); // tested to be best for mp3 dec\r
cc68a136	129	if (i < 0x10000) return;\r
	130	\r
	131	/* 940 crashed */\r
42c7b147	132	printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r
cc68a136	133	for (i = 0; i < 8; i++)\r
	134	printf("%i ", shared_ctl->vstarts[i]);\r
	135	printf(")\n");\r
abe0ea43	136	printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
4f265db7	137	gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
abe0ea43	138	printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
4f265db7	139	printf("trying to interrupt..\n");\r
4f265db7	140	gp2x_memregs[0x3B3E>>1] = 0xffff;\r
abe0ea43	141	for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r
4f265db7	142	spend_cycles(8*1024);\r
4f265db7	143	printf("i = 0x%x\n", i);\r
abe0ea43	144	printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
4f265db7	145	gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
abe0ea43	146	printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
4f265db7	147	\r
c6c6c9cd	148	me_update_msg("940 crashed, too much overclock?");\r
cc68a136	149	engineState = PGS_Menu;\r
cc68a136	150	crashed_940 = 1;\r
cc68a136	151	}\r
	152	\r
	153	\r
abe0ea43	154	static void add_job_940(int job)\r
cc68a136	155	{\r
abe0ea43	156	if (job <= 0 \|\| job > 16) {\r
	157	printf("add_job_940: bad job: %i\n", job);\r
	158	return;\r
4f265db7	159	}\r
abe0ea43	160	\r
	161	// generate interrupt for this job\r
	162	job--;\r
	163	gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r
	164	\r
	165	// printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r
cc68a136	166	}\r
	167	\r
	168	\r
	169	void YM2612PicoStateLoad_940(void)\r
	170	{\r
4b9c5888	171	UINT8 *REGS = YM2612GetRegs();\r
4b9c5888	172	\r
d5d11924	173	/* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r
	174	add_job_940(JOB940_PICOSTATELOAD);\r
	175	if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r
	176	\r
	177	writebuff_ptr = 0;\r
4b9c5888	178	addr_A1 = (INT32 ) (REGS + 0x200);\r
cc68a136	179	}\r
cc68a136	180	\r
e4fb433c	181	void YM2612PicoStateSave2_940(int tat, int tbt)\r
	182	{\r
	183	UINT8 ym_remote_regs, ym_local_regs;\r
	184	add_job_940(JOB940_PICOSTATESAVE2);\r
	185	if (CHECK_BUSY(JOB940_PICOSTATESAVE2)) wait_busy_940(JOB940_PICOSTATESAVE2);\r
	186	\r
	187	ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
	188	ym_local_regs = YM2612GetRegs();\r
	189	if ((UINT32 )(ym_remote_regs + 0x100) != 0x41534d59) {\r
	190	printf("code940 didn't return valid save data\n");\r
	191	return;\r
	192	}\r
	193	\r
	194	/* copy addin data only */\r
	195	memcpy(ym_local_regs, ym_remote_regs, 0x20);\r
	196	memcpy(ym_local_regs + 0x100, ym_remote_regs + 0x100, 0x30);\r
	197	memcpy(ym_local_regs + 0x0b8, ym_remote_regs + 0x0b8, 0x48);\r
	198	memcpy(ym_local_regs + 0x1b8, ym_remote_regs + 0x1b8, 0x48);\r
	199	(INT32 )(ym_local_regs + 0x108) = tat;\r
	200	(INT32 )(ym_local_regs + 0x10c) = tbt;\r
	201	}\r
	202	\r
	203	int YM2612PicoStateLoad2_940(int tat, int tbt)\r
	204	{\r
	205	UINT8 ym_remote_regs, ym_local_regs;\r
	206	ym_local_regs = YM2612GetRegs();\r
	207	ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
	208	\r
	209	if ((UINT32 )(ym_local_regs + 0x100) != 0x41534d59)\r
	210	return -1;\r
	211	\r
	212	tat = (INT32 *)(ym_local_regs + 0x108);\r
	213	tbt = (INT32 *)(ym_local_regs + 0x10c);\r
	214	\r
	215	if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
	216	\r
	217	/* flush writes */\r
	218	if (shared_ctl->writebuffsel == 1) {\r
	219	shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
	220	} else {\r
	221	shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
	222	}\r
	223	shared_ctl->writebuffsel ^= 1;\r
	224	writebuff_ptr = 0;\r
	225	add_job_940(JOB940_PICOSTATELOAD2_PREP);\r
	226	if (CHECK_BUSY(JOB940_PICOSTATELOAD2_PREP)) wait_busy_940(JOB940_PICOSTATELOAD2_PREP);\r
	227	\r
	228	memcpy(ym_remote_regs, ym_local_regs, 0x200);\r
	229	\r
	230	add_job_940(JOB940_PICOSTATELOAD2);\r
	231	if (CHECK_BUSY(JOB940_PICOSTATELOAD2)) wait_busy_940(JOB940_PICOSTATELOAD2);\r
	232	\r
	233	return 0;\r
	234	}\r
	235	\r
cc68a136	236	\r
	237	static void internal_reset(void)\r
	238	{\r
	239	writebuff_ptr = 0;\r
4b9c5888	240	ST_address = addr_A1 = -1;\r
cc68a136	241	}\r
	242	\r
	243	\r
f80d67e1	244	/* this must be called after mmu hack, the allocated regions must not get cached */\r
0d9bf4fc	245	void sharedmem940_init(void)\r
f80d67e1	246	{\r
	247	if (shared_mem != NULL) return;\r
	248	\r
	249	shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r
e4fb433c	250	if (shared_mem == MAP_FAILED)\r
f80d67e1	251	{\r
	252	printf("mmap(shared_data) failed with %i\n", errno);\r
	253	exit(1);\r
	254	}\r
	255	shared_data = (_940_data_t *) (shared_mem+0x100000);\r
	256	/* this area must not get buffered on either side */\r
	257	shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r
e362c573	258	mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r
f80d67e1	259	if (mp3_mem == MAP_FAILED)\r
	260	{\r
	261	printf("mmap(mp3_mem) failed with %i\n", errno);\r
	262	exit(1);\r
	263	}\r
	264	crashed_940 = 1;\r
	265	}\r
	266	\r
	267	\r
0d9bf4fc	268	void sharedmem940_finish(void)\r
85f8e929	269	{\r
	270	munmap(shared_mem, 0x210000);\r
	271	munmap(mp3_mem, MP3_SIZE_MAX);\r
	272	shared_mem = mp3_mem = NULL;\r
	273	shared_data = NULL;\r
	274	shared_ctl = NULL;\r
	275	}\r
	276	\r
	277	\r
cc68a136	278	extern char **g_argv;\r
cc68a136	279	\r
cc68a136	280	void YM2612Init_940(int baseclock, int rate)\r
	281	{\r
	282	printf("YM2612Init_940()\n");\r
b837b69b	283	printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(shared_data), sizeof(shared_ctl));\r
cc68a136	284	\r
42171343	285	reset940(1, 2);\r
42171343	286	pause940(1);\r
cc68a136	287	\r
4f265db7	288	gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r
4f265db7	289	gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r
cc68a136	290	\r
abe0ea43	291	gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r
	292	gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r
	293	\r
	294	\r
cc68a136	295	if (crashed_940)\r
	296	{\r
	297	unsigned char ucData[1024];\r
cc41eb4f	298	int nRead, nLen = 0;\r
27701801	299	char binpath[512];\r
cc68a136	300	FILE *fp;\r
cc68a136	301	\r
27701801	302	emu_make_path(binpath, CODE940_FILE, sizeof(binpath));\r
cc68a136	303	fp = fopen(binpath, "rb");\r
	304	if(!fp)\r
	305	{\r
e2de9939	306	memset(g_screen_ptr, 0, 3202402);\r
a12e0116	307	text_out16(10, 100, "failed to open required file:");\r
	308	text_out16(10, 110, CODE940_FILE);\r
	309	gp2x_video_flip2();\r
cc41eb4f	310	in_menu_wait(PBTN_MOK\|PBTN_MBACK, 100);\r
cc68a136	311	printf("failed to open %s\n", binpath);\r
	312	exit(1);\r
	313	}\r
	314	\r
	315	while(1)\r
	316	{\r
	317	nRead = fread(ucData, 1, 1024, fp);\r
	318	if(nRead <= 0)\r
	319	break;\r
	320	memcpy(shared_mem + nLen, ucData, nRead);\r
	321	nLen += nRead;\r
	322	}\r
	323	fclose(fp);\r
	324	crashed_940 = 0;\r
	325	}\r
	326	\r
	327	memset(shared_data, 0, sizeof(*shared_data));\r
	328	memset(shared_ctl, 0, sizeof(*shared_ctl));\r
	329	\r
5f8c85be	330	/* cause local ym2612 to init REGS */\r
	331	YM2612Init_(baseclock, rate);\r
	332	\r
cc68a136	333	internal_reset();\r
cc68a136	334	\r
51a902ae	335	loaded_mp3 = 0;\r
51a902ae	336	\r
4f265db7	337	gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r
abe0ea43	338	gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r
abe0ea43	339	gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r
cc68a136	340	\r
cc68a136	341	/* start the 940 */\r
42171343	342	reset940(0, 2);\r
42171343	343	pause940(0);\r
cc68a136	344	\r
cc68a136	345	// YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r
abe0ea43	346	\r
	347	/* now cause 940 to init it's ym2612 stuff */\r
	348	shared_ctl->baseclock = baseclock;\r
	349	shared_ctl->rate = rate;\r
	350	add_job_940(JOB940_INITALL);\r
cc68a136	351	}\r
	352	\r
	353	\r
	354	void YM2612ResetChip_940(void)\r
	355	{\r
daec7253	356	//printf("YM2612ResetChip_940()\n");\r
cc68a136	357	if (shared_data == NULL) {\r
	358	printf("YM2612ResetChip_940: reset before init?\n");\r
	359	return;\r
	360	}\r
	361	\r
4b9c5888	362	YM2612ResetChip_();\r
cc68a136	363	internal_reset();\r
cc68a136	364	\r
abe0ea43	365	add_job_940(JOB940_YM2612RESETCHIP);\r
cc68a136	366	}\r
	367	\r
	368	\r
abe0ea43	369	int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r
cb0316e4	370	{\r
abe0ea43	371	int *ym_buf = shared_data->ym_buffer;\r
85f8e929	372	int ym_active_chs;\r
4f265db7	373	\r
abe0ea43	374	//printf("YM2612UpdateOne_940()\n");\r
	375	\r
	376	if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
	377	\r
85f8e929	378	ym_active_chs = shared_ctl->ym_active_chs;\r
abe0ea43	379	\r
85f8e929	380	// mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r
	381	if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r
	382	else memset32(buffer, 0, length<<stereo);\r
abe0ea43	383	\r
abe0ea43	384	if (shared_ctl->writebuffsel == 1) {\r
2433f409	385	shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
4f265db7	386	} else {\r
2433f409	387	shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
cb0316e4	388	}\r
abe0ea43	389	writebuff_ptr = 0;\r
	390	\r
	391	/* predict sample counter for next frame */\r
	392	if (PsndLen_exc_add) {\r
52250671	393	length = PsndLen;\r
52250671	394	if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length++;\r
abe0ea43	395	}\r
	396	\r
	397	/* give 940 ym job */\r
	398	shared_ctl->writebuffsel ^= 1;\r
	399	shared_ctl->length = length;\r
	400	shared_ctl->stereo = stereo;\r
	401	\r
	402	add_job_940(JOB940_YM2612UPDATEONE);\r
	403	\r
85f8e929	404	return ym_active_chs;\r
cb0316e4	405	}\r
cb0316e4	406	\r
cb0316e4	407	\r
51a902ae	408	static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r
abe0ea43	409	static int mp3_play_bufsel = 0, mp3_job_started = 0;\r
cb0316e4	410	\r
abe0ea43	411	void mp3_update(int *buffer, int length, int stereo)\r
cc68a136	412	{\r
abe0ea43	413	int length_mp3;\r
abe0ea43	414	int cdda_on;\r
4f265db7	415	\r
da42200b	416	// playback was started, track not ended\r
da42200b	417	cdda_on = loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r
cc68a136	418	\r
abe0ea43	419	if (!cdda_on) return;\r
cc68a136	420	\r
abe0ea43	421	if (!(PicoOpt&0x200)) {\r
	422	mp3_update_local(buffer, length, stereo);\r
	423	return;\r
	424	}\r
cc68a136	425	\r
abe0ea43	426	length_mp3 = length;\r
	427	if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r
	428	else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r
4f265db7	429	\r
abe0ea43	430	/* do we have to wait? */\r
	431	if (mp3_job_started && mp3_samples_ready < length_mp3) {\r
	432	if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
	433	mp3_job_started = 0;\r
	434	mp3_samples_ready += 1152;\r
	435	}\r
cb0316e4	436	\r
4f265db7	437	/* mix mp3 data, only stereo */\r
abe0ea43	438	if (mp3_samples_ready >= length_mp3)\r
cb0316e4	439	{\r
4f265db7	440	int shr = 0;\r
	441	void (mix_samples)(int dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r
	442	if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r
	443	else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r
cb0316e4	444	\r
4f265db7	445	if (1152 - mp3_buffer_offs >= length_mp3) {\r
abe0ea43	446	mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r
4f265db7	447	\r
4f265db7	448	mp3_buffer_offs += length_mp3;\r
cb0316e4	449	} else {\r
abe0ea43	450	// collect samples from both buffers..\r
cb0316e4	451	int left = 1152 - mp3_buffer_offs;\r
4f265db7	452	if (mp3_play_bufsel == 0)\r
4f265db7	453	{\r
abe0ea43	454	mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r
4f265db7	455	mp3_buffer_offs = length_mp3 - left;\r
	456	mp3_play_bufsel = 1;\r
	457	} else {\r
	458	mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r
	459	mp3_buffer_offs = length_mp3 - left;\r
	460	mix_samples(buffer + ((left>>shr)<<1),\r
	461	shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r
	462	mp3_play_bufsel = 0;\r
	463	}\r
cc68a136	464	}\r
4f265db7	465	mp3_samples_ready -= length_mp3;\r
cc68a136	466	}\r
cc68a136	467	\r
abe0ea43	468	// ask to decode more if we already can\r
abe0ea43	469	if (!mp3_job_started)\r
cb0316e4	470	{\r
abe0ea43	471	mp3_job_started = 1;\r
cb0316e4	472	shared_ctl->mp3_buffsel ^= 1;\r
abe0ea43	473	add_job_940(JOB940_MP3DECODE);\r
cb0316e4	474	}\r
cc68a136	475	}\r
cb0316e4	476	\r
	477	\r
	478	/***********************************************************/\r
	479	\r
	480	void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r
	481	{\r
	482	int byte_offs = 0;\r
	483	\r
1cd356a3	484	if (!(PicoOpt&0x800)) { // cdda disabled?\r
cb0316e4	485	return;\r
	486	}\r
	487	\r
	488	if (loaded_mp3 != f)\r
	489	{\r
66fdc0f0	490	if (PicoMessage != NULL)\r
	491	{\r
	492	fseek(f, 0, SEEK_END);\r
	493	if (ftell(f) > 210241024)\r
	494	PicoMessage("Loading MP3...");\r
	495	}\r
cb0316e4	496	fseek(f, 0, SEEK_SET);\r
cb0316e4	497	fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r
e362c573	498	if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r
cb0316e4	499	shared_ctl->mp3_len = ftell(f);\r
cb0316e4	500	loaded_mp3 = f;\r
abe0ea43	501	\r
091facb8	502	if (PicoOpt & POPT_EXT_FM) {\r
abe0ea43	503	// as we are going to change 940's cacheable area, we must invalidate it's cache..\r
	504	if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
	505	add_job_940(JOB940_INVALIDATE_DCACHE);\r
	506	}\r
00bd648e	507	reset_timing = 1;\r
cb0316e4	508	}\r
	509	\r
	510	// seek..\r
	511	if (pos) {\r
	512	byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r
	513	byte_offs *= pos;\r
	514	byte_offs >>= 6;\r
	515	}\r
091facb8	516	printf(" mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r
cb0316e4	517	\r
cb0316e4	518	shared_ctl->mp3_offs = byte_offs;\r
51a902ae	519	\r
abe0ea43	520	// reset buffer pointers and stuff..\r
51a902ae	521	mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r
abe0ea43	522	mp3_job_started = 0;\r
51a902ae	523	shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r
abe0ea43	524	\r
091facb8	525	if (PicoOpt & POPT_EXT_FM)\r
	526	{\r
	527	add_job_940(JOB940_MP3RESET);\r
	528	if (CHECK_BUSY(JOB940_MP3RESET)) wait_busy_940(JOB940_MP3RESET);\r
	529	}\r
	530	else\r
	531	mp3_start_local();\r
cb0316e4	532	}\r
	533	\r
	534	\r
75736070	535	int mp3_get_offset(void)\r
75736070	536	{\r
da42200b	537	unsigned int offs1024 = 0;\r
75736070	538	int cdda_on;\r
75736070	539	\r
602133e1	540	cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r
abe0ea43	541	(Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r
75736070	542	\r
	543	if (cdda_on) {\r
	544	offs1024 = shared_ctl->mp3_offs << 7;\r
da42200b	545	offs1024 /= shared_ctl->mp3_len >> 3;\r
75736070	546	}\r
da42200b	547	printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r
75736070	548	\r
	549	return offs1024;\r
	550	}\r
	551	\r
	552	\r