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

/***********************************************************
 *                                                         *
 * This source was taken from the Gens project             *
 * Written by Stéphane Dallongeville                       *
 * Copyright (c) 2002 by Stéphane Dallongeville            *
 * Modified/adapted for PicoDrive by notaz, 2007           *
 *                                                         *
 ***********************************************************/

#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)
{
	int i, j, num_track, Cur_LBA, index, ret, iso_name_len;
	_scd_track *Tracks = Pico_mcd->TOC.Tracks;
	char tmp_name[1024], tmp_ext[10];
	pm_file *pmf;
	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;

	Tracks[0].F = pmf = pm_open(iso_name);
	if (Tracks[0].F == NULL)
	{
		Tracks[0].ftype = 0;
		Tracks[0].Length = 0;
		return -1;
	}

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

	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

	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;
			FILE *tmp_file;
			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)
			{
				int fs;
				struct stat file_stat;
				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;

	if (Pico_mcd->TOC.Tracks[0].F) pm_close(Pico_mcd->TOC.Tracks[0].F);

	for(i = 1; i < 100; i++)
	{
		if (Pico_mcd->TOC.Tracks[i].F) fclose(Pico_mcd->TOC.Tracks[i].F);
	}
	memset(Pico_mcd->TOC.Tracks, 0, sizeof(Pico_mcd->TOC.Tracks));
}


void PicoCDBufferRead(void *dest, int lba);


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

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

		// 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
			{
				int where_read = 0;

				// CAUTION : lookahead bit not implemented

				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;

				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;

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

				//pm_seek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
				//pm_read(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, 2048, Pico_mcd->TOC.Tracks[0].F);
				PicoCDBufferRead(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, where_read);

#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
6cadc2da	1	/***********************************************************
	2	* *
	3	* This source was taken from the Gens project *
	4	* Written by Stéphane Dallongeville *
	5	* Copyright (c) 2002 by Stéphane Dallongeville *
	6	* Modified/adapted for PicoDrive by notaz, 2007 *
	7	* *
	8	***********************************************************/
	9
bf098bc5	10	#include <sys/stat.h>
	11	#include "cd_file.h"
	12
	13	#include "../PicoInt.h"
	14
c459aefd	15	#define cdprintf dprintf
bf098bc5	16	//#define cdprintf(x...)
c459aefd	17	#define DEBUG_CD
bf098bc5	18
bf098bc5	19
	20	void FILE_End(void)
	21	{
	22	Unload_ISO();
	23	}
	24
	25
	26	int Load_ISO(const char *iso_name, int is_bin)
	27	{
cb0316e4	28	int i, j, num_track, Cur_LBA, index, ret, iso_name_len;
75736070	29	_scd_track *Tracks = Pico_mcd->TOC.Tracks;
bf098bc5	30	char tmp_name[1024], tmp_ext[10];
83bd0b76	31	pm_file *pmf;
bf098bc5	32	static char *exts[] = {
	33	"%02d.mp3", " %02d.mp3", "-%02d.mp3", "_%02d.mp3", " - %02d.mp3",
	34	"%d.mp3", " %d.mp3", "-%d.mp3", "_%d.mp3", " - %d.mp3",
51a902ae	35	"%02d.MP3", " %02d.MP3", "-%02d.MP3", "_%02d.MP3", " - %02d.MP3",
bf098bc5	36	/* "%02d.wav", " %02d.wav", "-%02d.wav", "_%02d.wav", " - %02d.wav",
	37	"%d.wav", " %d.wav", "-%d.wav", "_%d.wav", " - %2d.wav" */
	38	};
	39
	40	Unload_ISO();
	41
75736070	42	Tracks[0].ftype = is_bin ? TYPE_BIN : TYPE_ISO;
bf098bc5	43
83bd0b76	44	Tracks[0].F = pmf = pm_open(iso_name);
bf098bc5	45	if (Tracks[0].F == NULL)
bf098bc5	46	{
75736070	47	Tracks[0].ftype = 0;
cb0316e4	48	Tracks[0].Length = 0;
bf098bc5	49	return -1;
	50	}
	51
83bd0b76	52	if (Tracks[0].ftype == TYPE_ISO)
	53	Tracks[0].Length = pmf->size >>= 11; // size in sectors
	54	else Tracks[0].Length = pmf->size /= 2352;
bf098bc5	55
75736070	56	Tracks[0].MSF.M = 0; // minutes
	57	Tracks[0].MSF.S = 2; // seconds
	58	Tracks[0].MSF.F = 0; // frames
bf098bc5	59
75736070	60	cdprintf("Track 0 - %02d:%02d:%02d DATA", Tracks[0].MSF.M, Tracks[0].MSF.S, Tracks[0].MSF.F);
bf098bc5	61
cb0316e4	62	Cur_LBA = Tracks[0].Length; // Size in sectors
bf098bc5	63
cb0316e4	64	iso_name_len = strlen(iso_name);
bf098bc5	65
cb0316e4	66	for (num_track = 2, i = 0; i < 100; i++)
bf098bc5	67	{
bf098bc5	68	for(j = 0; j < sizeof(exts)/sizeof(char *); j++)
bf098bc5	69	{
cb0316e4	70	int ext_len;
83bd0b76	71	FILE *tmp_file;
bf098bc5	72	sprintf(tmp_ext, exts[j], i);
cb0316e4	73	ext_len = strlen(tmp_ext);
	74
	75	memcpy(tmp_name, iso_name, iso_name_len + 1);
	76	tmp_name[iso_name_len - 4] = 0;
bf098bc5	77	strcat(tmp_name, tmp_ext);
	78
	79	tmp_file = fopen(tmp_name, "rb");
cb0316e4	80	if (!tmp_file && i > 1 && iso_name_len > ext_len) {
	81	tmp_name[iso_name_len - ext_len] = 0;
	82	strcat(tmp_name, tmp_ext);
	83	tmp_file = fopen(tmp_name, "rb");
	84	}
bf098bc5	85
	86	if (tmp_file)
	87	{
cb0316e4	88	int fs;
83bd0b76	89	struct stat file_stat;
75736070	90	index = num_track - 1;
bf098bc5	91
cb0316e4	92	ret = stat(tmp_name, &file_stat);
cb0316e4	93	fs = file_stat.st_size; // used to calculate lenght
bf098bc5	94
cb0316e4	95	Tracks[index].KBtps = (short) mp3_get_bitrate(tmp_file, fs);
	96	Tracks[index].KBtps >>= 3;
	97	if (ret != 0 \|\| Tracks[index].KBtps <= 0)
	98	{
	99	cdprintf("Error track %i: stat %i, rate %i", index, ret, Tracks[index].KBtps);
	100	fclose(tmp_file);
	101	continue;
	102	}
bf098bc5	103
	104	Tracks[index].F = tmp_file;
	105
75736070	106	LBA_to_MSF(Cur_LBA, &Tracks[index].MSF);
bf098bc5	107
bf098bc5	108	// MP3 File
75736070	109	Tracks[index].ftype = TYPE_MP3;
bf098bc5	110	fs *= 75;
cb0316e4	111	fs /= Tracks[index].KBtps * 1000;
	112	Tracks[index].Length = fs;
	113	Cur_LBA += Tracks[index].Length;
	114
75736070	115	cdprintf("Track %i: %s - %02d:%02d:%02d len=%i AUDIO", index, tmp_name, Tracks[index].MSF.M,
75736070	116	Tracks[index].MSF.S, Tracks[index].MSF.F, fs);
bf098bc5	117
	118	num_track++;
	119	break;
	120	}
	121	}
	122	}
	123
75736070	124	Pico_mcd->TOC.Last_Track = num_track - 1;
bf098bc5	125
75736070	126	index = num_track - 1;
bf098bc5	127
75736070	128	LBA_to_MSF(Cur_LBA, &Tracks[index].MSF);
bf098bc5	129
75736070	130	cdprintf("End CD - %02d:%02d:%02d\n\n", Tracks[index].MSF.M,
75736070	131	Tracks[index].MSF.S, Tracks[index].MSF.F);
bf098bc5	132
	133	return 0;
	134	}
	135
	136
	137	void Unload_ISO(void)
	138	{
	139	int i;
	140
75736070	141	if (Pico_mcd == NULL) return;
bf098bc5	142
83bd0b76	143	if (Pico_mcd->TOC.Tracks[0].F) pm_close(Pico_mcd->TOC.Tracks[0].F);
	144
	145	for(i = 1; i < 100; i++)
bf098bc5	146	{
75736070	147	if (Pico_mcd->TOC.Tracks[i].F) fclose(Pico_mcd->TOC.Tracks[i].F);
bf098bc5	148	}
83bd0b76	149	memset(Pico_mcd->TOC.Tracks, 0, sizeof(Pico_mcd->TOC.Tracks));
bf098bc5	150	}
	151
	152
0a051f55	153	void PicoCDBufferRead(void *dest, int lba);
	154
	155
bf098bc5	156	int FILE_Read_One_LBA_CDC(void)
bf098bc5	157	{
75736070	158	// static char cp_buf[2560];
bf098bc5	159
	160	if (Pico_mcd->s68k_regs[0x36] & 1) // DATA
	161	{
75736070	162	if (Pico_mcd->TOC.Tracks[0].F == NULL) return -1;
bf098bc5	163
75736070	164	// moved below..
	165	//fseek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
	166	//fread(cp_buf, 1, 2048, Pico_mcd->TOC.Tracks[0].F);
bf098bc5	167
c459aefd	168	cdprintf("Read file CDC 1 data sector :\n");
bf098bc5	169	}
	170	else // AUDIO
	171	{
	172	// int rate, channel;
	173
0a051f55	174	// if (Pico_mcd->TOC.Tracks[Pico_mcd->scd.Cur_Track - 1].ftype == TYPE_MP3)
bf098bc5	175	{
	176	// TODO
	177	// MP3_Update(cp_buf, &rate, &channel, 0);
	178	// Write_CD_Audio((short *) cp_buf, rate, channel, 588);
	179	}
	180
c459aefd	181	cdprintf("Read file CDC 1 audio sector :\n");
bf098bc5	182	}
	183
	184	// Update CDC stuff
	185
	186	CDC_Update_Header();
	187
	188	if (Pico_mcd->s68k_regs[0x36] & 1) // DATA track
	189	{
	190	if (Pico_mcd->cdc.CTRL.B.B0 & 0x80) // DECEN = decoding enable
	191	{
	192	if (Pico_mcd->cdc.CTRL.B.B0 & 0x04) // WRRQ : this bit enable write to buffer
	193	{
0a051f55	194	int where_read = 0;
0a051f55	195
bf098bc5	196	// CAUTION : lookahead bit not implemented
bf098bc5	197
0a051f55	198	if (Pico_mcd->scd.Cur_LBA < 0)
	199	where_read = 0;
	200	else if (Pico_mcd->scd.Cur_LBA >= Pico_mcd->TOC.Tracks[0].Length)
	201	where_read = Pico_mcd->TOC.Tracks[0].Length - 1;
	202	else where_read = Pico_mcd->scd.Cur_LBA;
	203
bf098bc5	204	Pico_mcd->scd.Cur_LBA++;
	205
	206	Pico_mcd->cdc.WA.N = (Pico_mcd->cdc.WA.N + 2352) & 0x7FFF; // add one sector to WA
	207	Pico_mcd->cdc.PT.N = (Pico_mcd->cdc.PT.N + 2352) & 0x7FFF;
	208
83bd0b76	209	(unsigned int )(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N) = Pico_mcd->cdc.HEAD.N;
75736070	210	//memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N + 4], cp_buf, 2048);
75736070	211
0a051f55	212	//pm_seek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
	213	//pm_read(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, 2048, Pico_mcd->TOC.Tracks[0].F);
	214	PicoCDBufferRead(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, where_read);
bf098bc5	215
bf098bc5	216	#ifdef DEBUG_CD
c459aefd	217	cdprintf("Read -> WA = %d Buffer[%d] =", Pico_mcd->cdc.WA.N, Pico_mcd->cdc.PT.N & 0x3FFF);
c459aefd	218	cdprintf("Header 1 = %.2X %.2X %.2X %.2X", Pico_mcd->cdc.HEAD.B.B0,
bf098bc5	219	Pico_mcd->cdc.HEAD.B.B1, Pico_mcd->cdc.HEAD.B.B2, Pico_mcd->cdc.HEAD.B.B3);
	220	cdprintf("Header 2 = %.2X %.2X %.2X %.2X --- %.2X %.2X\n\n",
	221	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 0) & 0x3FFF],
	222	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 1) & 0x3FFF],
	223	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 2) & 0x3FFF],
	224	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 3) & 0x3FFF],
	225	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 4) & 0x3FFF],
	226	Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 5) & 0x3FFF]);
	227	#endif
	228	}
	229
	230	}
	231	}
	232	else // music track
	233	{
	234	Pico_mcd->scd.Cur_LBA++;
	235
	236	Pico_mcd->cdc.WA.N = (Pico_mcd->cdc.WA.N + 2352) & 0x7FFF; // add one sector to WA
	237	Pico_mcd->cdc.PT.N = (Pico_mcd->cdc.PT.N + 2352) & 0x7FFF;
	238
	239	if (Pico_mcd->cdc.CTRL.B.B0 & 0x80) // DECEN = decoding enable
	240	{
	241	if (Pico_mcd->cdc.CTRL.B.B0 & 0x04) // WRRQ : this bit enable write to buffer
	242	{
	243	// CAUTION : lookahead bit not implemented
	244
75736070	245	//memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N], cp_buf, 2352);
bf098bc5	246	}
	247	}
	248	}
	249
	250	if (Pico_mcd->cdc.CTRL.B.B0 & 0x80) // DECEN = decoding enable
	251	{
	252	Pico_mcd->cdc.STAT.B.B0 = 0x80;
	253
	254	if (Pico_mcd->cdc.CTRL.B.B0 & 0x10) // determine form bit form sub header ?
	255	{
	256	Pico_mcd->cdc.STAT.B.B2 = Pico_mcd->cdc.CTRL.B.B1 & 0x08;
	257	}
	258	else
	259	{
	260	Pico_mcd->cdc.STAT.B.B2 = Pico_mcd->cdc.CTRL.B.B1 & 0x0C;
	261	}
	262
	263	if (Pico_mcd->cdc.CTRL.B.B0 & 0x02) Pico_mcd->cdc.STAT.B.B3 = 0x20; // ECC done
	264	else Pico_mcd->cdc.STAT.B.B3 = 0x00; // ECC not done
	265
	266	if (Pico_mcd->cdc.IFCTRL & 0x20)
	267	{
	268	if (Pico_mcd->s68k_regs[0x33] & (1<<5))
	269	{
	270	dprintf("cdc dec irq 5");
	271	SekInterruptS68k(5);
	272	}
	273
75736070	274	Pico_mcd->cdc.IFSTAT &= ~0x20; // DEC interrupt happen
75736070	275	Pico_mcd->cdc.Decode_Reg_Read = 0; // Reset read after DEC int
bf098bc5	276	}
	277	}
	278
	279
	280	return 0;
	281	}
	282
	283
	284	int FILE_Play_CD_LBA(void)
	285	{
75736070	286	int index = Pico_mcd->scd.Cur_Track - 1;
75736070	287	Pico_mcd->m.audio_track = index;
bf098bc5	288
75736070	289	cdprintf("Play track #%i", Pico_mcd->scd.Cur_Track);
bf098bc5	290
75736070	291	if (Pico_mcd->TOC.Tracks[index].F == NULL)
bf098bc5	292	{
	293	return 1;
	294	}
	295
75736070	296	if (Pico_mcd->TOC.Tracks[index].ftype == TYPE_MP3)
bf098bc5	297	{
75736070	298	int pos1024 = 0;
bf098bc5	299	int Track_LBA_Pos = Pico_mcd->scd.Cur_LBA - Track_to_LBA(Pico_mcd->scd.Cur_Track);
bf098bc5	300	if (Track_LBA_Pos < 0) Track_LBA_Pos = 0;
cb0316e4	301	if (Track_LBA_Pos)
75736070	302	pos1024 = Track_LBA_Pos * 1024 / Pico_mcd->TOC.Tracks[index].Length;
bf098bc5	303
75736070	304	mp3_start_play(Pico_mcd->TOC.Tracks[index].F, pos1024);
bf098bc5	305	}
	306	else
	307	{
	308	return 3;
	309	}
	310
	311	return 0;
	312	}
	313