[picodrive.git] / Pico / cd / cd_file.c

#include <sys/stat.h>
#include "cd_file.h"

#include "../PicoInt.h"

#define cdprintf dprintf
//#define cdprintf(x...)
#define DEBUG_CD


void FILE_End(void)
{
	Unload_ISO();
}


int Load_ISO(const char *iso_name, int is_bin)
{
	struct stat file_stat;
	int i, j, num_track, Cur_LBA, index, ret, iso_name_len;
	_scd_track *Tracks = Pico_mcd->TOC.Tracks;
	FILE *tmp_file;
	char tmp_name[1024], tmp_ext[10];
	static char *exts[] = {
		"%02d.mp3", " %02d.mp3", "-%02d.mp3", "_%02d.mp3", " - %02d.mp3",
		"%d.mp3", " %d.mp3", "-%d.mp3", "_%d.mp3", " - %d.mp3",
		"%02d.MP3", " %02d.MP3", "-%02d.MP3", "_%02d.MP3", " - %02d.MP3",
		/* "%02d.wav", " %02d.wav", "-%02d.wav", "_%02d.wav", " - %02d.wav",
		"%d.wav", " %d.wav", "-%d.wav", "_%d.wav", " - %2d.wav" */
	};

	Unload_ISO();

	Tracks[0].ftype = is_bin ? TYPE_BIN : TYPE_ISO;

	ret = stat(iso_name, &file_stat);
	if (ret != 0) return -1;

	Tracks[0].Length = file_stat.st_size;

	if (Tracks[0].ftype == TYPE_ISO) Tracks[0].Length >>= 11;	// size in sectors
	else Tracks[0].Length /= 2352;					// size in sectors


	Tracks[0].F = fopen(iso_name, "rb");
	if (Tracks[0].F == NULL)
	{
		Tracks[0].ftype = 0;
		Tracks[0].Length = 0;
		return -1;
	}

	if (Tracks[0].ftype == TYPE_ISO) fseek(Tracks[0].F, 0x100, SEEK_SET);
	else fseek(Tracks[0].F, 0x110, SEEK_SET);

	// fread(buf, 1, 0x200, Tracks[0].F);
	fseek(Tracks[0].F, 0, SEEK_SET);

	Tracks[0].MSF.M = 0; // minutes
	Tracks[0].MSF.S = 2; // seconds
	Tracks[0].MSF.F = 0; // frames

	cdprintf("Track 0 - %02d:%02d:%02d DATA", Tracks[0].MSF.M, Tracks[0].MSF.S, Tracks[0].MSF.F);

	Cur_LBA = Tracks[0].Length;				// Size in sectors

	strcpy(tmp_name, iso_name);
	iso_name_len = strlen(iso_name);

	for (num_track = 2, i = 0; i < 100; i++)
	{
		for(j = 0; j < sizeof(exts)/sizeof(char *); j++)
		{
			int ext_len;
			sprintf(tmp_ext, exts[j], i);
			ext_len = strlen(tmp_ext);

			memcpy(tmp_name, iso_name, iso_name_len + 1);
			tmp_name[iso_name_len - 4] = 0;
			strcat(tmp_name, tmp_ext);

			tmp_file = fopen(tmp_name, "rb");
			if (!tmp_file && i > 1 && iso_name_len > ext_len) {
				tmp_name[iso_name_len - ext_len] = 0;
				strcat(tmp_name, tmp_ext);
				tmp_file = fopen(tmp_name, "rb");
			}

			if (tmp_file)
			{
				// float fs;
				int fs;
				index = num_track - 1;

				ret = stat(tmp_name, &file_stat);
				fs = file_stat.st_size;				// used to calculate lenght

				Tracks[index].KBtps = (short) mp3_get_bitrate(tmp_file, fs);
				Tracks[index].KBtps >>= 3;
				if (ret != 0 || Tracks[index].KBtps <= 0)
				{
					cdprintf("Error track %i: stat %i, rate %i", index, ret, Tracks[index].KBtps);
					fclose(tmp_file);
					continue;
				}

				Tracks[index].F = tmp_file;

				LBA_to_MSF(Cur_LBA, &Tracks[index].MSF);

				// MP3 File
				Tracks[index].ftype = TYPE_MP3;
				fs *= 75;
				fs /= Tracks[index].KBtps * 1000;
				Tracks[index].Length = fs;
				Cur_LBA += Tracks[index].Length;

				cdprintf("Track %i: %s - %02d:%02d:%02d len=%i AUDIO", index, tmp_name, Tracks[index].MSF.M,
					Tracks[index].MSF.S, Tracks[index].MSF.F, fs);

				num_track++;
				break;
			}
		}
	}

	Pico_mcd->TOC.Last_Track = num_track - 1;

	index = num_track - 1;

	LBA_to_MSF(Cur_LBA, &Tracks[index].MSF);

	cdprintf("End CD - %02d:%02d:%02d\n\n", Tracks[index].MSF.M,
		Tracks[index].MSF.S, Tracks[index].MSF.F);

	return 0;
}


void Unload_ISO(void)
{
	int i;

	if (Pico_mcd == NULL) return;

	for(i = 0; i < 100; i++)
	{
		if (Pico_mcd->TOC.Tracks[i].F) fclose(Pico_mcd->TOC.Tracks[i].F);
		Pico_mcd->TOC.Tracks[i].F = NULL;
		Pico_mcd->TOC.Tracks[i].Length = 0;
		Pico_mcd->TOC.Tracks[i].ftype = 0;
	}
}


int FILE_Read_One_LBA_CDC(void)
{
	int where_read = 0;
//	static char cp_buf[2560];

	if (Pico_mcd->s68k_regs[0x36] & 1)					// DATA
	{
		if (Pico_mcd->TOC.Tracks[0].F == NULL) return -1;

		if (Pico_mcd->scd.Cur_LBA < 0)
			where_read = 0;
		else if (Pico_mcd->scd.Cur_LBA >= Pico_mcd->TOC.Tracks[0].Length)
			where_read = Pico_mcd->TOC.Tracks[0].Length - 1;
		else where_read = Pico_mcd->scd.Cur_LBA;

		if (Pico_mcd->TOC.Tracks[0].ftype == TYPE_ISO) where_read <<= 11;
		else where_read = (where_read * 2352 + 16);

		// moved below..
		//fseek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
		//fread(cp_buf, 1, 2048, Pico_mcd->TOC.Tracks[0].F);

		cdprintf("Read file CDC 1 data sector :\n");
	}
	else									// AUDIO
	{
		// int rate, channel;

		if (Pico_mcd->TOC.Tracks[Pico_mcd->scd.Cur_Track - 1].ftype == TYPE_MP3)
		{
			// TODO
			// MP3_Update(cp_buf, &rate, &channel, 0);
			// Write_CD_Audio((short *) cp_buf, rate, channel, 588);
		}

		cdprintf("Read file CDC 1 audio sector :\n");
	}

	// Update CDC stuff

	CDC_Update_Header();

	if (Pico_mcd->s68k_regs[0x36] & 1)		// DATA track
	{
		if (Pico_mcd->cdc.CTRL.B.B0 & 0x80)		// DECEN = decoding enable
		{
			if (Pico_mcd->cdc.CTRL.B.B0 & 0x04)	// WRRQ : this bit enable write to buffer
			{
				// CAUTION : lookahead bit not implemented

				Pico_mcd->scd.Cur_LBA++;

				Pico_mcd->cdc.WA.N = (Pico_mcd->cdc.WA.N + 2352) & 0x7FFF;		// add one sector to WA
				Pico_mcd->cdc.PT.N = (Pico_mcd->cdc.PT.N + 2352) & 0x7FFF;

				memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N], &Pico_mcd->cdc.HEAD, 4);
				//memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N + 4], cp_buf, 2048);

				fseek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
				fread(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, 1, 2048, Pico_mcd->TOC.Tracks[0].F);

#ifdef DEBUG_CD
				cdprintf("Read -> WA = %d  Buffer[%d] =", Pico_mcd->cdc.WA.N, Pico_mcd->cdc.PT.N & 0x3FFF);
				cdprintf("Header 1 = %.2X %.2X %.2X %.2X", Pico_mcd->cdc.HEAD.B.B0,
					Pico_mcd->cdc.HEAD.B.B1, Pico_mcd->cdc.HEAD.B.B2, Pico_mcd->cdc.HEAD.B.B3);
				cdprintf("Header 2 = %.2X %.2X %.2X %.2X --- %.2X %.2X\n\n",
					Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 0) & 0x3FFF],
					Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 1) & 0x3FFF],
					Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 2) & 0x3FFF],
					Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 3) & 0x3FFF],
					Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 4) & 0x3FFF],
					Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 5) & 0x3FFF]);
#endif
			}

		}
	}
	else		// music track
	{
		Pico_mcd->scd.Cur_LBA++;

		Pico_mcd->cdc.WA.N = (Pico_mcd->cdc.WA.N + 2352) & 0x7FFF;		// add one sector to WA
		Pico_mcd->cdc.PT.N = (Pico_mcd->cdc.PT.N + 2352) & 0x7FFF;

		if (Pico_mcd->cdc.CTRL.B.B0 & 0x80)		// DECEN = decoding enable
		{
			if (Pico_mcd->cdc.CTRL.B.B0 & 0x04)	// WRRQ : this bit enable write to buffer
			{
				// CAUTION : lookahead bit not implemented

				//memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N], cp_buf, 2352);
			}
		}
	}

	if (Pico_mcd->cdc.CTRL.B.B0 & 0x80)		// DECEN = decoding enable
	{
		Pico_mcd->cdc.STAT.B.B0 = 0x80;

		if (Pico_mcd->cdc.CTRL.B.B0 & 0x10)	// determine form bit form sub header ?
		{
			Pico_mcd->cdc.STAT.B.B2 = Pico_mcd->cdc.CTRL.B.B1 & 0x08;
		}
		else
		{
			Pico_mcd->cdc.STAT.B.B2 = Pico_mcd->cdc.CTRL.B.B1 & 0x0C;
		}

		if (Pico_mcd->cdc.CTRL.B.B0 & 0x02) Pico_mcd->cdc.STAT.B.B3 = 0x20;	// ECC done
		else Pico_mcd->cdc.STAT.B.B3 = 0x00;	// ECC not done

		if (Pico_mcd->cdc.IFCTRL & 0x20)
		{
			if (Pico_mcd->s68k_regs[0x33] & (1<<5))
			{
				dprintf("cdc dec irq 5");
				SekInterruptS68k(5);
			}

			Pico_mcd->cdc.IFSTAT &= ~0x20;		// DEC interrupt happen
			Pico_mcd->cdc.Decode_Reg_Read = 0;	// Reset read after DEC int
		}
	}


	return 0;
}


int FILE_Play_CD_LBA(void)
{
	int index = Pico_mcd->scd.Cur_Track - 1;
	Pico_mcd->m.audio_track = index;

	cdprintf("Play track #%i", Pico_mcd->scd.Cur_Track);

	if (Pico_mcd->TOC.Tracks[index].F == NULL)
	{
		return 1;
	}

	if (Pico_mcd->TOC.Tracks[index].ftype == TYPE_MP3)
	{
		int pos1024 = 0;
		int Track_LBA_Pos = Pico_mcd->scd.Cur_LBA - Track_to_LBA(Pico_mcd->scd.Cur_Track);
		if (Track_LBA_Pos < 0) Track_LBA_Pos = 0;
		if (Track_LBA_Pos)
			pos1024 = Track_LBA_Pos * 1024 / Pico_mcd->TOC.Tracks[index].Length;

		mp3_start_play(Pico_mcd->TOC.Tracks[index].F, pos1024);
	}
	else
	{
		return 3;
	}

	return 0;
}
Commit	Line	Data
bf098bc5	1	#include <sys/stat.h>
	2	#include "cd_file.h"
	3
	4	#include "../PicoInt.h"
	5
c459aefd	6	#define cdprintf dprintf
bf098bc5	7	//#define cdprintf(x...)
c459aefd	8	#define DEBUG_CD
bf098bc5	9
bf098bc5	10
	11	void FILE_End(void)
	12	{
	13	Unload_ISO();
	14	}
	15
	16
	17	int Load_ISO(const char *iso_name, int is_bin)
	18	{
	19	struct stat file_stat;
cb0316e4	20	int i, j, num_track, Cur_LBA, index, ret, iso_name_len;
75736070	21	_scd_track *Tracks = Pico_mcd->TOC.Tracks;
bf098bc5	22	FILE *tmp_file;
	23	char tmp_name[1024], tmp_ext[10];
	24	static char *exts[] = {
	25	"%02d.mp3", " %02d.mp3", "-%02d.mp3", "_%02d.mp3", " - %02d.mp3",
	26	"%d.mp3", " %d.mp3", "-%d.mp3", "_%d.mp3", " - %d.mp3",
51a902ae	27	"%02d.MP3", " %02d.MP3", "-%02d.MP3", "_%02d.MP3", " - %02d.MP3",
bf098bc5	28	/* "%02d.wav", " %02d.wav", "-%02d.wav", "_%02d.wav", " - %02d.wav",
	29	"%d.wav", " %d.wav", "-%d.wav", "_%d.wav", " - %2d.wav" */
	30	};
	31
	32	Unload_ISO();
	33
75736070	34	Tracks[0].ftype = is_bin ? TYPE_BIN : TYPE_ISO;
bf098bc5	35
	36	ret = stat(iso_name, &file_stat);
	37	if (ret != 0) return -1;
	38
cb0316e4	39	Tracks[0].Length = file_stat.st_size;
bf098bc5	40
75736070	41	if (Tracks[0].ftype == TYPE_ISO) Tracks[0].Length >>= 11; // size in sectors
cb0316e4	42	else Tracks[0].Length /= 2352; // size in sectors
bf098bc5	43
	44
	45	Tracks[0].F = fopen(iso_name, "rb");
	46	if (Tracks[0].F == NULL)
	47	{
75736070	48	Tracks[0].ftype = 0;
cb0316e4	49	Tracks[0].Length = 0;
bf098bc5	50	return -1;
	51	}
	52
75736070	53	if (Tracks[0].ftype == TYPE_ISO) fseek(Tracks[0].F, 0x100, SEEK_SET);
bf098bc5	54	else fseek(Tracks[0].F, 0x110, SEEK_SET);
	55
	56	// fread(buf, 1, 0x200, Tracks[0].F);
	57	fseek(Tracks[0].F, 0, SEEK_SET);
	58
75736070	59	Tracks[0].MSF.M = 0; // minutes
	60	Tracks[0].MSF.S = 2; // seconds
	61	Tracks[0].MSF.F = 0; // frames
bf098bc5	62
75736070	63	cdprintf("Track 0 - %02d:%02d:%02d DATA", Tracks[0].MSF.M, Tracks[0].MSF.S, Tracks[0].MSF.F);
bf098bc5	64
cb0316e4	65	Cur_LBA = Tracks[0].Length; // Size in sectors
bf098bc5	66
bf098bc5	67	strcpy(tmp_name, iso_name);
cb0316e4	68	iso_name_len = strlen(iso_name);
bf098bc5	69
cb0316e4	70	for (num_track = 2, i = 0; i < 100; i++)
bf098bc5	71	{
bf098bc5	72	for(j = 0; j < sizeof(exts)/sizeof(char *); j++)
bf098bc5	73	{
cb0316e4	74	int ext_len;
bf098bc5	75	sprintf(tmp_ext, exts[j], i);
cb0316e4	76	ext_len = strlen(tmp_ext);
	77
	78	memcpy(tmp_name, iso_name, iso_name_len + 1);
	79	tmp_name[iso_name_len - 4] = 0;
bf098bc5	80	strcat(tmp_name, tmp_ext);
	81
	82	tmp_file = fopen(tmp_name, "rb");
cb0316e4	83	if (!tmp_file && i > 1 && iso_name_len > ext_len) {
	84	tmp_name[iso_name_len - ext_len] = 0;
	85	strcat(tmp_name, tmp_ext);
	86	tmp_file = fopen(tmp_name, "rb");
	87	}
bf098bc5	88
	89	if (tmp_file)
	90	{
cb0316e4	91	// float fs;
cb0316e4	92	int fs;
75736070	93	index = num_track - 1;
bf098bc5	94
cb0316e4	95	ret = stat(tmp_name, &file_stat);
cb0316e4	96	fs = file_stat.st_size; // used to calculate lenght
bf098bc5	97
cb0316e4	98	Tracks[index].KBtps = (short) mp3_get_bitrate(tmp_file, fs);
	99	Tracks[index].KBtps >>= 3;
	100	if (ret != 0 \|\| Tracks[index].KBtps <= 0)
	101	{
	102	cdprintf("Error track %i: stat %i, rate %i", index, ret, Tracks[index].KBtps);
	103	fclose(tmp_file);
	104	continue;
	105	}
bf098bc5	106
	107	Tracks[index].F = tmp_file;
	108
75736070	109	LBA_to_MSF(Cur_LBA, &Tracks[index].MSF);
bf098bc5	110
bf098bc5	111	// MP3 File
75736070	112	Tracks[index].ftype = TYPE_MP3;
bf098bc5	113	fs *= 75;
cb0316e4	114	fs /= Tracks[index].KBtps * 1000;
	115	Tracks[index].Length = fs;
	116	Cur_LBA += Tracks[index].Length;
	117
75736070	118	cdprintf("Track %i: %s - %02d:%02d:%02d len=%i AUDIO", index, tmp_name, Tracks[index].MSF.M,
75736070	119	Tracks[index].MSF.S, Tracks[index].MSF.F, fs);
bf098bc5	120
	121	num_track++;
	122	break;
	123	}
	124	}
	125	}
	126
75736070	127	Pico_mcd->TOC.Last_Track = num_track - 1;
bf098bc5	128
75736070	129	index = num_track - 1;
bf098bc5	130
75736070	131	LBA_to_MSF(Cur_LBA, &Tracks[index].MSF);
bf098bc5	132
75736070	133	cdprintf("End CD - %02d:%02d:%02d\n\n", Tracks[index].MSF.M,
75736070	134	Tracks[index].MSF.S, Tracks[index].MSF.F);
bf098bc5	135
	136	return 0;
	137	}
	138
	139
	140	void Unload_ISO(void)
	141	{
	142	int i;
	143
75736070	144	if (Pico_mcd == NULL) return;
bf098bc5	145
	146	for(i = 0; i < 100; i++)
	147	{
75736070	148	if (Pico_mcd->TOC.Tracks[i].F) fclose(Pico_mcd->TOC.Tracks[i].F);
	149	Pico_mcd->TOC.Tracks[i].F = NULL;
	150	Pico_mcd->TOC.Tracks[i].Length = 0;
	151	Pico_mcd->TOC.Tracks[i].ftype = 0;
bf098bc5	152	}
	153	}
	154
	155
	156	int FILE_Read_One_LBA_CDC(void)
	157	{
75736070	158	int where_read = 0;
75736070	159	// static char cp_buf[2560];
bf098bc5	160
	161	if (Pico_mcd->s68k_regs[0x36] & 1) // DATA
	162	{
75736070	163	if (Pico_mcd->TOC.Tracks[0].F == NULL) return -1;
bf098bc5	164
75736070	165	if (Pico_mcd->scd.Cur_LBA < 0)
	166	where_read = 0;
	167	else if (Pico_mcd->scd.Cur_LBA >= Pico_mcd->TOC.Tracks[0].Length)
	168	where_read = Pico_mcd->TOC.Tracks[0].Length - 1;
bf098bc5	169	else where_read = Pico_mcd->scd.Cur_LBA;
bf098bc5	170
75736070	171	if (Pico_mcd->TOC.Tracks[0].ftype == TYPE_ISO) where_read <<= 11;
bf098bc5	172	else where_read = (where_read * 2352 + 16);
bf098bc5	173
75736070	174	// moved below..
	175	//fseek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
	176	//fread(cp_buf, 1, 2048, Pico_mcd->TOC.Tracks[0].F);
bf098bc5	177
c459aefd	178	cdprintf("Read file CDC 1 data sector :\n");
bf098bc5	179	}
	180	else // AUDIO
	181	{
	182	// int rate, channel;
	183
75736070	184	if (Pico_mcd->TOC.Tracks[Pico_mcd->scd.Cur_Track - 1].ftype == TYPE_MP3)
bf098bc5	185	{
	186	// TODO
	187	// MP3_Update(cp_buf, &rate, &channel, 0);
	188	// Write_CD_Audio((short *) cp_buf, rate, channel, 588);
	189	}
	190
c459aefd	191	cdprintf("Read file CDC 1 audio sector :\n");
bf098bc5	192	}
	193
	194	// Update CDC stuff
	195
	196	CDC_Update_Header();
	197
	198	if (Pico_mcd->s68k_regs[0x36] & 1) // DATA track
	199	{
	200	if (Pico_mcd->cdc.CTRL.B.B0 & 0x80) // DECEN = decoding enable
	201	{
	202	if (Pico_mcd->cdc.CTRL.B.B0 & 0x04) // WRRQ : this bit enable write to buffer
	203	{
	204	// CAUTION : lookahead bit not implemented
	205
	206	Pico_mcd->scd.Cur_LBA++;
	207
	208	Pico_mcd->cdc.WA.N = (Pico_mcd->cdc.WA.N + 2352) & 0x7FFF; // add one sector to WA
	209	Pico_mcd->cdc.PT.N = (Pico_mcd->cdc.PT.N + 2352) & 0x7FFF;
	210
bf098bc5	211	memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N], &Pico_mcd->cdc.HEAD, 4);
75736070	212	//memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N + 4], cp_buf, 2048);
	213
	214	fseek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
	215	fread(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, 1, 2048, Pico_mcd->TOC.Tracks[0].F);
bf098bc5	216
bf098bc5	217	#ifdef DEBUG_CD
c459aefd	218	cdprintf("Read -> WA = %d Buffer[%d] =", Pico_mcd->cdc.WA.N, Pico_mcd->cdc.PT.N & 0x3FFF);
c459aefd	219	cdprintf("Header 1 = %.2X %.2X %.2X %.2X", Pico_mcd->cdc.HEAD.B.B0,
bf098bc5	220	Pico_mcd->cdc.HEAD.B.B1, Pico_mcd->cdc.HEAD.B.B2, Pico_mcd->cdc.HEAD.B.B3);
	221	cdprintf("Header 2 = %.2X %.2X %.2X %.2X --- %.2X %.2X\n\n",
	222	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 0) & 0x3FFF],
	223	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 1) & 0x3FFF],
	224	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 2) & 0x3FFF],
	225	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 3) & 0x3FFF],
	226	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 4) & 0x3FFF],
	227	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 5) & 0x3FFF]);
	228	#endif
	229	}
	230
	231	}
	232	}
	233	else // music track
	234	{
	235	Pico_mcd->scd.Cur_LBA++;
	236
	237	Pico_mcd->cdc.WA.N = (Pico_mcd->cdc.WA.N + 2352) & 0x7FFF; // add one sector to WA
	238	Pico_mcd->cdc.PT.N = (Pico_mcd->cdc.PT.N + 2352) & 0x7FFF;
	239
	240	if (Pico_mcd->cdc.CTRL.B.B0 & 0x80) // DECEN = decoding enable
	241	{
	242	if (Pico_mcd->cdc.CTRL.B.B0 & 0x04) // WRRQ : this bit enable write to buffer
	243	{
	244	// CAUTION : lookahead bit not implemented
	245
75736070	246	//memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N], cp_buf, 2352);
bf098bc5	247	}
	248	}
	249	}
	250
	251	if (Pico_mcd->cdc.CTRL.B.B0 & 0x80) // DECEN = decoding enable
	252	{
	253	Pico_mcd->cdc.STAT.B.B0 = 0x80;
	254
	255	if (Pico_mcd->cdc.CTRL.B.B0 & 0x10) // determine form bit form sub header ?
	256	{
	257	Pico_mcd->cdc.STAT.B.B2 = Pico_mcd->cdc.CTRL.B.B1 & 0x08;
	258	}
	259	else
	260	{
	261	Pico_mcd->cdc.STAT.B.B2 = Pico_mcd->cdc.CTRL.B.B1 & 0x0C;
	262	}
	263
	264	if (Pico_mcd->cdc.CTRL.B.B0 & 0x02) Pico_mcd->cdc.STAT.B.B3 = 0x20; // ECC done
	265	else Pico_mcd->cdc.STAT.B.B3 = 0x00; // ECC not done
	266
	267	if (Pico_mcd->cdc.IFCTRL & 0x20)
	268	{
	269	if (Pico_mcd->s68k_regs[0x33] & (1<<5))
	270	{
	271	dprintf("cdc dec irq 5");
	272	SekInterruptS68k(5);
	273	}
	274
75736070	275	Pico_mcd->cdc.IFSTAT &= ~0x20; // DEC interrupt happen
75736070	276	Pico_mcd->cdc.Decode_Reg_Read = 0; // Reset read after DEC int
bf098bc5	277	}
	278	}
	279
	280
	281	return 0;
	282	}
	283
	284
	285	int FILE_Play_CD_LBA(void)
	286	{
75736070	287	int index = Pico_mcd->scd.Cur_Track - 1;
75736070	288	Pico_mcd->m.audio_track = index;
bf098bc5	289
75736070	290	cdprintf("Play track #%i", Pico_mcd->scd.Cur_Track);
bf098bc5	291
75736070	292	if (Pico_mcd->TOC.Tracks[index].F == NULL)
bf098bc5	293	{
	294	return 1;
	295	}
	296
75736070	297	if (Pico_mcd->TOC.Tracks[index].ftype == TYPE_MP3)
bf098bc5	298	{
75736070	299	int pos1024 = 0;
bf098bc5	300	int Track_LBA_Pos = Pico_mcd->scd.Cur_LBA - Track_to_LBA(Pico_mcd->scd.Cur_Track);
bf098bc5	301	if (Track_LBA_Pos < 0) Track_LBA_Pos = 0;
cb0316e4	302	if (Track_LBA_Pos)
75736070	303	pos1024 = Track_LBA_Pos * 1024 / Pico_mcd->TOC.Tracks[index].Length;
bf098bc5	304
75736070	305	mp3_start_play(Pico_mcd->TOC.Tracks[index].F, pos1024);
bf098bc5	306	}
	307	else
	308	{
	309	return 3;
	310	}
	311
	312	return 0;
	313	}
	314