[pcsx_rearmed.git] / plugins / cdrcimg / cdrcimg.c

/*
 * (C) Gražvydas "notaz" Ignotas, 2010
 *
 * This work is licensed under the terms of any of these licenses
 * (at your option):
 *  - GNU GPL, version 2 or later.
 *  - GNU LGPL, version 2.1 or later.
 * See the COPYING file in the top-level directory.
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <zlib.h>
#ifndef _WIN32
#define CALLBACK
#ifndef NO_DYLIB
#include <dlfcn.h>
#endif
#else
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif

#include "cdrcimg.h"

#define PFX "cdrcimg: "
#define err(f, ...) fprintf(stderr, PFX f, ##__VA_ARGS__)

#define CD_FRAMESIZE_RAW 2352

enum {
	CDRC_ZLIB,
	CDRC_ZLIB2,
	CDRC_BZ,
};

static const char *cd_fname;
static unsigned int *cd_index_table;
static unsigned int  cd_index_len;
static unsigned int  cd_sectors_per_blk;
static int cd_compression;
static FILE *cd_file;

static int (*pBZ2_bzBuffToBuffDecompress)(char *dest, unsigned int *destLen, char *source,
		unsigned int sourceLen, int small, int verbosity);

static struct {
	unsigned char raw[16][CD_FRAMESIZE_RAW];
	unsigned char compressed[CD_FRAMESIZE_RAW * 16 + 100];
} *cdbuffer;
static int current_block, current_sect_in_blk;

struct CdrStat;
extern long CALLBACK CDR__getStatus(struct CdrStat *stat);

struct CdrStat
{
	unsigned int Type;
	unsigned int Status;
	unsigned char Time[3]; // current playing time
};

struct trackinfo {
	enum {DATA, CDDA} type;
	char start[3];		// MSF-format
	char length[3];		// MSF-format
};

#define MAXTRACKS 100 /* How many tracks can a CD hold? */

static int numtracks = 0;

#define btoi(b)           ((b) / 16 * 10 + (b) % 16) /* BCD to u_char */
#define MSF2SECT(m, s, f) (((m) * 60 + (s) - 2) * 75 + (f))

// return Starting and Ending Track
// buffer:
//  byte 0 - start track
//  byte 1 - end track
static long CDRgetTN(unsigned char *buffer)
{
	buffer[0] = 1;
	buffer[1] = numtracks > 0 ? numtracks : 1;

	return 0;
}

// return Track Time
// buffer:
//  byte 0 - frame
//  byte 1 - second
//  byte 2 - minute
static long CDRgetTD(unsigned char track, unsigned char *buffer)
{
	buffer[2] = 0;
	buffer[1] = 2;
	buffer[0] = 0;

	return 0;
}

int uncompress2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
{
	static z_stream z;
	int ret = 0;

	if (z.zalloc == NULL) {
		// XXX: one-time leak here..
		z.next_in = Z_NULL;
		z.avail_in = 0;
		z.zalloc = Z_NULL;
		z.zfree = Z_NULL;
		z.opaque = Z_NULL;
		ret = inflateInit2(&z, -15);
	}
	else
		ret = inflateReset(&z);
	if (ret != Z_OK)
		return ret;

	z.next_in = in;
	z.avail_in = in_size;
	z.next_out = out;
	z.avail_out = *out_size;

	ret = inflate(&z, Z_NO_FLUSH);
	//inflateEnd(&z);

	*out_size -= z.avail_out;
	return ret == 1 ? 0 : ret;
}

// read track
// time: byte 0 - minute; byte 1 - second; byte 2 - frame
// uses bcd format
static long CDRreadTrack(unsigned char *time)
{
	unsigned int start_byte, size;
	unsigned long cdbuffer_size;
	int ret, sector, block;

	if (cd_file == NULL)
		return -1;

	sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));

	// avoid division if possible
	switch (cd_sectors_per_blk) {
	case 1:
		block = sector;
		current_sect_in_blk = 0;
		break;
	case 10:
		block = sector / 10;
		current_sect_in_blk = sector % 10;
		break;
	case 16:
		block = sector >> 4;
		current_sect_in_blk = sector & 15;
		break;
	default:
		err("unhandled cd_sectors_per_blk: %d\n", cd_sectors_per_blk);
		return -1;
	}

	if (block == current_block) {
		// it's already there, nothing to do
		//printf("hit sect %d\n", sector);
		return 0;
	}

	if (sector >= cd_index_len * cd_sectors_per_blk) {
		err("sector %d is past track end\n", sector);
		return -1;
	}

	start_byte = cd_index_table[block];
	if (fseek(cd_file, start_byte, SEEK_SET) != 0) {
		err("seek error for block %d at %x: ",
			block, start_byte);
		perror(NULL);
		return -1;
	}

	size = cd_index_table[block + 1] - start_byte;
	if (size > sizeof(cdbuffer->compressed)) {
		err("block %d is too large: %u\n", block, size);
		return -1;
	}

	if (fread(cdbuffer->compressed, 1, size, cd_file) != size) {
		err("read error for block %d at %x: ", block, start_byte);
		perror(NULL);
		return -1;
	}

	cdbuffer_size = sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk;
	switch (cd_compression) {
	case CDRC_ZLIB:
		ret = uncompress(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
		break;
	case CDRC_ZLIB2:
		ret = uncompress2(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
		break;
	case CDRC_BZ:
		ret = pBZ2_bzBuffToBuffDecompress((char *)cdbuffer->raw, (unsigned int *)&cdbuffer_size,
			(char *)cdbuffer->compressed, size, 0, 0);
		break;
	default:
		err("bad cd_compression: %d\n", cd_compression);
		return -1;
	}

	if (ret != 0) {
		err("uncompress failed with %d for block %d, sector %d\n",
			ret, block, sector);
		return -1;
	}
	if (cdbuffer_size != sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk)
		err("cdbuffer_size: %lu != %d, sector %d\n", cdbuffer_size,
			(int)sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk, sector);

	// done at last!
	current_block = block;
	return 0;
}

// return read track
static unsigned char *CDRgetBuffer(void)
{
	return cdbuffer->raw[current_sect_in_blk] + 12;
}

// plays cdda audio
// sector: byte 0 - minute; byte 1 - second; byte 2 - frame
// does NOT uses bcd format
static long CDRplay(unsigned char *time)
{
	return 0;
}

// stops cdda audio
static long CDRstop(void)
{
	return 0;
}

// gets subchannel data
static unsigned char* CDRgetBufferSub(void)
{
	return NULL;
}

static long CDRgetStatus(struct CdrStat *stat) {
	CDR__getStatus(stat);

	stat->Type = 0x01;

	return 0;
}

static long CDRclose(void)
{
	if (cd_file != NULL) {
		fclose(cd_file);
		cd_file = NULL;
	}
	if (cd_index_table != NULL) {
		free(cd_index_table);
		cd_index_table = NULL;
	}
	return 0;
}

static long CDRshutdown(void)
{
	return CDRclose();
}

static long CDRinit(void)
{
	if (cdbuffer == NULL) {
		cdbuffer = malloc(sizeof(*cdbuffer));
		if (cdbuffer == NULL) {
			err("OOM\n");
			return -1;
		}
	}
#if !defined(_WIN32) && !defined(NO_DYLIB)
	if (pBZ2_bzBuffToBuffDecompress == NULL) {
		void *h = dlopen("/usr/lib/libbz2.so.1", RTLD_LAZY);
		if (h == NULL)
			h = dlopen("./lib/libbz2.so.1", RTLD_LAZY);
		if (h != NULL) {
			pBZ2_bzBuffToBuffDecompress = dlsym(h, "BZ2_bzBuffToBuffDecompress");
			if (pBZ2_bzBuffToBuffDecompress == NULL) {
				err("dlsym bz2: %s", dlerror());
				dlclose(h);
			}
		}
	}
#endif
	return 0;
}

static long handle_eboot(void)
{
	struct {
		unsigned int sig;
		unsigned int dontcare[8];
		unsigned int psar_offs;
	} pbp_hdr;
	struct {
		unsigned int offset;
		unsigned int size;
		unsigned int dontcare[6];
	} index_entry;
	char psar_sig[9];
	unsigned int cdimg_base;
	int i, ret;
	FILE *f;

	f = fopen(cd_fname, "rb");
	if (f == NULL) {
		err("missing file: %s: ", cd_fname);
		perror(NULL);
		return -1;
	}

	ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), f);
	if (ret != sizeof(pbp_hdr)) {
		err("failed to read pbp\n");
		goto fail_io;
	}

	ret = fseek(f, pbp_hdr.psar_offs, SEEK_SET);
	if (ret != 0) {
		err("failed to seek to %x\n", pbp_hdr.psar_offs);
		goto fail_io;
	}

	ret = fread(psar_sig, 1, sizeof(psar_sig), f);
	if (ret != sizeof(psar_sig)) {
		err("failed to read psar_sig\n");
		goto fail_io;
	}

	psar_sig[8] = 0;
	if (strcmp(psar_sig, "PSISOIMG") != 0) {
		err("bad psar_sig: %s\n", psar_sig);
		goto fail_io;
	}

	// seek to ISO index
	ret = fseek(f, 0x4000 - sizeof(psar_sig), SEEK_CUR);
	if (ret != 0) {
		err("failed to seek to ISO index\n");
		goto fail_io;
	}

	cd_index_len = (0x100000 - 0x4000) / sizeof(index_entry);
	cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
	if (cd_index_table == NULL)
		goto fail_io;

	cdimg_base = pbp_hdr.psar_offs + 0x100000;
	for (i = 0; i < cd_index_len; i++) {
		ret = fread(&index_entry, 1, sizeof(index_entry), f);
		if (ret != sizeof(index_entry)) {
			err("failed to read index_entry #%d\n", i);
			goto fail_index;
		}

		if (index_entry.size == 0)
			break;

		cd_index_table[i] = cdimg_base + index_entry.offset;
	}
	cd_index_table[i] = cdimg_base + index_entry.offset + index_entry.size;

	cd_compression = CDRC_ZLIB2;
	cd_sectors_per_blk = 16;
	cd_file = f;

	printf(PFX "Loaded EBOOT CD Image: %s.\n", cd_fname);
	return 0;

fail_index:
	free(cd_index_table);
	cd_index_table = NULL;
fail_io:
	fclose(f);
	return -1;
}

// This function is invoked by the front-end when opening an ISO
// file for playback
static long CDRopen(void)
{
	union {
		struct {
			unsigned int offset;
			unsigned short size;
		} __attribute__((packed)) ztab_entry;
		struct {
			unsigned int offset;
			unsigned short size;
			unsigned int dontcare;
		} __attribute__((packed)) znxtab_entry;
		unsigned int bztab_entry;
	} u;
	int tabentry_size;
	char table_fname[256];
	long table_size;
	int i, ret;
	char *ext;
	FILE *f = NULL;

	if (cd_file != NULL)
		return 0; // it's already open

	numtracks = 0;
	current_block = -1;
	current_sect_in_blk = 0;

	if (cd_fname == NULL)
		return -1;

	ext = strrchr(cd_fname, '.');
	if (ext == NULL)
		return -1;

	if (strcasecmp(ext, ".pbp") == 0) {
		return handle_eboot();
	}

	// pocketiso stuff
	else if (strcasecmp(ext, ".z") == 0) {
		cd_compression = CDRC_ZLIB;
		tabentry_size = sizeof(u.ztab_entry);
		snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
	}
	else if (strcasecmp(ext, ".znx") == 0) {
		cd_compression = CDRC_ZLIB;
		tabentry_size = sizeof(u.znxtab_entry);
		snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
	}
	else if (strcasecmp(ext, ".bz") == 0) {
		if (pBZ2_bzBuffToBuffDecompress == NULL) {
			err("libbz2 unavailable for .bz2 handling\n");
			return -1;
		}
		cd_compression = CDRC_BZ;
		tabentry_size = sizeof(u.bztab_entry);
		snprintf(table_fname, sizeof(table_fname), "%s.index", cd_fname);
	}
	else {
		err("unhandled extension: %s\n", ext);
		return -1;
	}

	f = fopen(table_fname, "rb");
	if (f == NULL) {
		err("missing file: %s: ", table_fname);
		perror(NULL);
		return -1;
	}

	ret = fseek(f, 0, SEEK_END);
	if (ret != 0) {
		err("failed to seek\n");
		goto fail_table_io;
	}
	table_size = ftell(f);
	fseek(f, 0, SEEK_SET);

	if (table_size > 4 * 1024 * 1024) {
		err(".table too large\n");
		goto fail_table_io;
	}

	cd_index_len = table_size / tabentry_size;

	cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
	if (cd_index_table == NULL)
		goto fail_table_io;

	switch (cd_compression) {
	case CDRC_ZLIB:
		// a Z.table file is binary where each element represents
		// one compressed frame.  
		//    4 bytes: the offset of the frame in the .Z file
		//    2 bytes: the length of the compressed frame
		// .znx.table has 4 additional bytes (xa header??)
		u.znxtab_entry.dontcare = 0;
		for (i = 0; i < cd_index_len; i++) {
			ret = fread(&u, 1, tabentry_size, f);
			if (ret != tabentry_size) {
				err(".table read failed on entry %d/%d\n", i, cd_index_len);
				goto fail_table_io_read;
			}
			cd_index_table[i] = u.ztab_entry.offset;
			//if (u.znxtab_entry.dontcare != 0)
			//	printf("znx %08x!\n", u.znxtab_entry.dontcare);
		}
		// fake entry, so that we know last compressed block size
		cd_index_table[i] = u.ztab_entry.offset + u.ztab_entry.size;
		cd_sectors_per_blk = 1;
		break;
	case CDRC_BZ:
		// the .BZ.table file is arranged so that one entry represents
		// 10 compressed frames. Each element is a 4 byte unsigned integer
		// representing the offset in the .BZ file. Last entry is the size
		// of the compressed file.
		for (i = 0; i < cd_index_len; i++) {
			ret = fread(&u.bztab_entry, 1, sizeof(u.bztab_entry), f);
			if (ret != sizeof(u.bztab_entry)) {
				err(".table read failed on entry %d/%d\n", i, cd_index_len);
				goto fail_table_io_read;
			}
			cd_index_table[i] = u.bztab_entry;
		}
		cd_sectors_per_blk = 10;
		break;
	}

	cd_file = fopen(cd_fname, "rb");
	if (cd_file == NULL) {
		err("failed to open: %s: ", table_fname);
		perror(NULL);
		goto fail_img;
	}
	fclose(f);

	printf(PFX "Loaded compressed CD Image: %s.\n", cd_fname);

	return 0;

fail_img:
fail_table_io_read:
	free(cd_index_table);
	cd_index_table = NULL;
fail_table_io:
	fclose(f);
	return -1;
}

#define FUNC(n) { #n, n }

static const struct {
	const char *name;
	void *func;
} plugin_funcs[] = {
	/* CDR */
	FUNC(CDRinit),
	FUNC(CDRshutdown),
	FUNC(CDRopen),
	FUNC(CDRclose),
	FUNC(CDRgetTN),
	FUNC(CDRgetTD),
	FUNC(CDRreadTrack),
	FUNC(CDRgetBuffer),
	FUNC(CDRgetBufferSub),
	FUNC(CDRplay),
	FUNC(CDRstop),
	FUNC(CDRgetStatus),
};

void cdrcimg_set_fname(const char *fname)
{
	cd_fname = fname;
}

void *cdrcimg_get_sym(const char *sym)
{
	int i;
	for (i = 0; i < sizeof(plugin_funcs) / sizeof(plugin_funcs[0]); i++)
		if (strcmp(plugin_funcs[i].name, sym) == 0)
			return plugin_funcs[i].func;
	return NULL;
}
Commit	Line	Data
47bf65ab	1	/*
	2	* (C) Gražvydas "notaz" Ignotas, 2010
	3	*
	4	* This work is licensed under the terms of any of these licenses
	5	* (at your option):
	6	* - GNU GPL, version 2 or later.
	7	* - GNU LGPL, version 2.1 or later.
	8	* See the COPYING file in the top-level directory.
	9	*/
	10
	11	#include <stdio.h>
	12	#include <string.h>
	13	#include <stdlib.h>
	14	#include <zlib.h>
003cfc63	15	#ifndef _WIN32
003cfc63	16	#define CALLBACK
c4052f4d	17	#ifndef NO_DYLIB
bb5cf0fc	18	#include <dlfcn.h>
fc99395c	19	#endif
003cfc63	20	#else
	21	#define WIN32_LEAN_AND_MEAN
	22	#include <windows.h>
	23	#endif
47bf65ab	24
	25	#include "cdrcimg.h"
	26
33716956	27	#define PFX "cdrcimg: "
	28	#define err(f, ...) fprintf(stderr, PFX f, ##__VA_ARGS__)
	29
47bf65ab	30	#define CD_FRAMESIZE_RAW 2352
47bf65ab	31
33716956	32	enum {
	33	CDRC_ZLIB,
	34	CDRC_ZLIB2,
	35	CDRC_BZ,
	36	};
	37
47bf65ab	38	static const char *cd_fname;
	39	static unsigned int *cd_index_table;
	40	static unsigned int cd_index_len;
33716956	41	static unsigned int cd_sectors_per_blk;
33716956	42	static int cd_compression;
47bf65ab	43	static FILE *cd_file;
47bf65ab	44
bb5cf0fc	45	static int (pBZ2_bzBuffToBuffDecompress)(char dest, unsigned int destLen, char source,
	46	unsigned int sourceLen, int small, int verbosity);
	47
33716956	48	static struct {
	49	unsigned char raw[16][CD_FRAMESIZE_RAW];
	50	unsigned char compressed[CD_FRAMESIZE_RAW * 16 + 100];
	51	} *cdbuffer;
	52	static int current_block, current_sect_in_blk;
47bf65ab	53
47bf65ab	54	struct CdrStat;
003cfc63	55	extern long CALLBACK CDR__getStatus(struct CdrStat *stat);
47bf65ab	56
	57	struct CdrStat
	58	{
c668f248	59	unsigned int Type;
c668f248	60	unsigned int Status;
47bf65ab	61	unsigned char Time[3]; // current playing time
	62	};
	63
	64	struct trackinfo {
	65	enum {DATA, CDDA} type;
	66	char start[3]; // MSF-format
	67	char length[3]; // MSF-format
	68	};
	69
	70	#define MAXTRACKS 100 /* How many tracks can a CD hold? */
	71
	72	static int numtracks = 0;
	73
	74	#define btoi(b) ((b) / 16 * 10 + (b) % 16) /* BCD to u_char */
	75	#define MSF2SECT(m, s, f) (((m) * 60 + (s) - 2) * 75 + (f))
	76
	77	// return Starting and Ending Track
	78	// buffer:
	79	// byte 0 - start track
	80	// byte 1 - end track
	81	static long CDRgetTN(unsigned char *buffer)
	82	{
	83	buffer[0] = 1;
	84	buffer[1] = numtracks > 0 ? numtracks : 1;
	85
	86	return 0;
	87	}
	88
	89	// return Track Time
	90	// buffer:
	91	// byte 0 - frame
	92	// byte 1 - second
	93	// byte 2 - minute
	94	static long CDRgetTD(unsigned char track, unsigned char *buffer)
	95	{
	96	buffer[2] = 0;
	97	buffer[1] = 2;
	98	buffer[0] = 0;
	99
	100	return 0;
	101	}
	102
33716956	103	int uncompress2(void out, unsigned long out_size, void *in, unsigned long in_size)
	104	{
	105	static z_stream z;
	106	int ret = 0;
	107
	108	if (z.zalloc == NULL) {
	109	// XXX: one-time leak here..
	110	z.next_in = Z_NULL;
	111	z.avail_in = 0;
	112	z.zalloc = Z_NULL;
	113	z.zfree = Z_NULL;
	114	z.opaque = Z_NULL;
	115	ret = inflateInit2(&z, -15);
	116	}
	117	else
	118	ret = inflateReset(&z);
	119	if (ret != Z_OK)
	120	return ret;
	121
	122	z.next_in = in;
	123	z.avail_in = in_size;
	124	z.next_out = out;
	125	z.avail_out = *out_size;
	126
	127	ret = inflate(&z, Z_NO_FLUSH);
	128	//inflateEnd(&z);
	129
	130	*out_size -= z.avail_out;
	131	return ret == 1 ? 0 : ret;
	132	}
	133
47bf65ab	134	// read track
	135	// time: byte 0 - minute; byte 1 - second; byte 2 - frame
	136	// uses bcd format
	137	static long CDRreadTrack(unsigned char *time)
	138	{
	139	unsigned int start_byte, size;
	140	unsigned long cdbuffer_size;
33716956	141	int ret, sector, block;
47bf65ab	142
	143	if (cd_file == NULL)
	144	return -1;
	145
	146	sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
33716956	147
	148	// avoid division if possible
	149	switch (cd_sectors_per_blk) {
	150	case 1:
	151	block = sector;
	152	current_sect_in_blk = 0;
	153	break;
	154	case 10:
	155	block = sector / 10;
	156	current_sect_in_blk = sector % 10;
	157	break;
	158	case 16:
	159	block = sector >> 4;
	160	current_sect_in_blk = sector & 15;
	161	break;
	162	default:
	163	err("unhandled cd_sectors_per_blk: %d\n", cd_sectors_per_blk);
	164	return -1;
	165	}
	166
	167	if (block == current_block) {
47bf65ab	168	// it's already there, nothing to do
	169	//printf("hit sect %d\n", sector);
	170	return 0;
	171	}
	172
33716956	173	if (sector >= cd_index_len * cd_sectors_per_blk) {
33716956	174	err("sector %d is past track end\n", sector);
47bf65ab	175	return -1;
	176	}
	177
33716956	178	start_byte = cd_index_table[block];
47bf65ab	179	if (fseek(cd_file, start_byte, SEEK_SET) != 0) {
33716956	180	err("seek error for block %d at %x: ",
33716956	181	block, start_byte);
47bf65ab	182	perror(NULL);
	183	return -1;
	184	}
	185
33716956	186	size = cd_index_table[block + 1] - start_byte;
	187	if (size > sizeof(cdbuffer->compressed)) {
	188	err("block %d is too large: %u\n", block, size);
47bf65ab	189	return -1;
	190	}
	191
33716956	192	if (fread(cdbuffer->compressed, 1, size, cd_file) != size) {
33716956	193	err("read error for block %d at %x: ", block, start_byte);
47bf65ab	194	perror(NULL);
	195	return -1;
	196	}
	197
33716956	198	cdbuffer_size = sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk;
	199	switch (cd_compression) {
	200	case CDRC_ZLIB:
	201	ret = uncompress(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
	202	break;
	203	case CDRC_ZLIB2:
	204	ret = uncompress2(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
	205	break;
	206	case CDRC_BZ:
bb5cf0fc	207	ret = pBZ2_bzBuffToBuffDecompress((char )cdbuffer->raw, (unsigned int )&cdbuffer_size,
33716956	208	(char *)cdbuffer->compressed, size, 0, 0);
	209	break;
	210	default:
	211	err("bad cd_compression: %d\n", cd_compression);
	212	return -1;
	213	}
	214
47bf65ab	215	if (ret != 0) {
33716956	216	err("uncompress failed with %d for block %d, sector %d\n",
33716956	217	ret, block, sector);
47bf65ab	218	return -1;
47bf65ab	219	}
33716956	220	if (cdbuffer_size != sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk)
33716956	221	err("cdbuffer_size: %lu != %d, sector %d\n", cdbuffer_size,
c979c3ee	222	(int)sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk, sector);
47bf65ab	223
47bf65ab	224	// done at last!
33716956	225	current_block = block;
47bf65ab	226	return 0;
	227	}
	228
	229	// return read track
	230	static unsigned char *CDRgetBuffer(void)
	231	{
33716956	232	return cdbuffer->raw[current_sect_in_blk] + 12;
47bf65ab	233	}
	234
	235	// plays cdda audio
	236	// sector: byte 0 - minute; byte 1 - second; byte 2 - frame
	237	// does NOT uses bcd format
	238	static long CDRplay(unsigned char *time)
	239	{
	240	return 0;
	241	}
	242
	243	// stops cdda audio
	244	static long CDRstop(void)
	245	{
	246	return 0;
	247	}
	248
	249	// gets subchannel data
	250	static unsigned char* CDRgetBufferSub(void)
	251	{
	252	return NULL;
	253	}
	254
	255	static long CDRgetStatus(struct CdrStat *stat) {
	256	CDR__getStatus(stat);
	257
	258	stat->Type = 0x01;
	259
	260	return 0;
	261	}
	262
	263	static long CDRclose(void)
	264	{
	265	if (cd_file != NULL) {
	266	fclose(cd_file);
	267	cd_file = NULL;
	268	}
	269	if (cd_index_table != NULL) {
	270	free(cd_index_table);
	271	cd_index_table = NULL;
	272	}
	273	return 0;
	274	}
	275
	276	static long CDRshutdown(void)
	277	{
	278	return CDRclose();
	279	}
	280
	281	static long CDRinit(void)
	282	{
33716956	283	if (cdbuffer == NULL) {
	284	cdbuffer = malloc(sizeof(*cdbuffer));
	285	if (cdbuffer == NULL) {
	286	err("OOM\n");
	287	return -1;
	288	}
	289	}
c4052f4d	290	#if !defined(_WIN32) && !defined(NO_DYLIB)
bb5cf0fc	291	if (pBZ2_bzBuffToBuffDecompress == NULL) {
	292	void *h = dlopen("/usr/lib/libbz2.so.1", RTLD_LAZY);
	293	if (h == NULL)
	294	h = dlopen("./lib/libbz2.so.1", RTLD_LAZY);
	295	if (h != NULL) {
	296	pBZ2_bzBuffToBuffDecompress = dlsym(h, "BZ2_bzBuffToBuffDecompress");
	297	if (pBZ2_bzBuffToBuffDecompress == NULL) {
	298	err("dlsym bz2: %s", dlerror());
	299	dlclose(h);
	300	}
	301	}
	302	}
003cfc63	303	#endif
33716956	304	return 0;
	305	}
	306
	307	static long handle_eboot(void)
	308	{
	309	struct {
	310	unsigned int sig;
	311	unsigned int dontcare[8];
	312	unsigned int psar_offs;
	313	} pbp_hdr;
	314	struct {
	315	unsigned int offset;
	316	unsigned int size;
	317	unsigned int dontcare[6];
	318	} index_entry;
	319	char psar_sig[9];
	320	unsigned int cdimg_base;
	321	int i, ret;
	322	FILE *f;
	323
	324	f = fopen(cd_fname, "rb");
	325	if (f == NULL) {
	326	err("missing file: %s: ", cd_fname);
	327	perror(NULL);
	328	return -1;
	329	}
	330
	331	ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), f);
	332	if (ret != sizeof(pbp_hdr)) {
	333	err("failed to read pbp\n");
	334	goto fail_io;
	335	}
	336
	337	ret = fseek(f, pbp_hdr.psar_offs, SEEK_SET);
	338	if (ret != 0) {
	339	err("failed to seek to %x\n", pbp_hdr.psar_offs);
	340	goto fail_io;
	341	}
	342
	343	ret = fread(psar_sig, 1, sizeof(psar_sig), f);
	344	if (ret != sizeof(psar_sig)) {
	345	err("failed to read psar_sig\n");
	346	goto fail_io;
	347	}
	348
	349	psar_sig[8] = 0;
	350	if (strcmp(psar_sig, "PSISOIMG") != 0) {
	351	err("bad psar_sig: %s\n", psar_sig);
	352	goto fail_io;
	353	}
	354
	355	// seek to ISO index
	356	ret = fseek(f, 0x4000 - sizeof(psar_sig), SEEK_CUR);
	357	if (ret != 0) {
	358	err("failed to seek to ISO index\n");
	359	goto fail_io;
	360	}
	361
	362	cd_index_len = (0x100000 - 0x4000) / sizeof(index_entry);
	363	cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
	364	if (cd_index_table == NULL)
	365	goto fail_io;
	366
	367	cdimg_base = pbp_hdr.psar_offs + 0x100000;
368	for (i = 0; i < cd_index_len; i++) {
369	ret = fread(&index_entry, 1, sizeof(index_entry), f);
370	if (ret != sizeof(index_entry)) {
371	err("failed to read index_entry #%d\n", i);
372	goto fail_index;
373	}
374
375	if (index_entry.size == 0)
376	break;
377
378	cd_index_table[i] = cdimg_base + index_entry.offset;
379	}
380	cd_index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
381
382	cd_compression = CDRC_ZLIB2;
383	cd_sectors_per_blk = 16;
384	cd_file = f;
385
386	printf(PFX "Loaded EBOOT CD Image: %s.\n", cd_fname);
387	return 0;
388
389	fail_index:
390	free(cd_index_table);
391	cd_index_table = NULL;
392	fail_io:
393	fclose(f);
394	return -1;
47bf65ab	395	}
	396
	397	// This function is invoked by the front-end when opening an ISO
	398	// file for playback
	399	static long CDRopen(void)
	400	{
33716956	401	union {
	402	struct {
	403	unsigned int offset;
	404	unsigned short size;
	405	} __attribute__((packed)) ztab_entry;
	406	struct {
	407	unsigned int offset;
	408	unsigned short size;
	409	unsigned int dontcare;
	410	} __attribute__((packed)) znxtab_entry;
	411	unsigned int bztab_entry;
	412	} u;
	413	int tabentry_size;
47bf65ab	414	char table_fname[256];
	415	long table_size;
	416	int i, ret;
33716956	417	char *ext;
33716956	418	FILE *f = NULL;
47bf65ab	419
	420	if (cd_file != NULL)
	421	return 0; // it's already open
	422
	423	numtracks = 0;
33716956	424	current_block = -1;
33716956	425	current_sect_in_blk = 0;
47bf65ab	426
	427	if (cd_fname == NULL)
	428	return -1;
	429
33716956	430	ext = strrchr(cd_fname, '.');
	431	if (ext == NULL)
	432	return -1;
	433
	434	if (strcasecmp(ext, ".pbp") == 0) {
	435	return handle_eboot();
	436	}
	437
	438	// pocketiso stuff
	439	else if (strcasecmp(ext, ".z") == 0) {
	440	cd_compression = CDRC_ZLIB;
	441	tabentry_size = sizeof(u.ztab_entry);
	442	snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
	443	}
	444	else if (strcasecmp(ext, ".znx") == 0) {
	445	cd_compression = CDRC_ZLIB;
	446	tabentry_size = sizeof(u.znxtab_entry);
	447	snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
	448	}
	449	else if (strcasecmp(ext, ".bz") == 0) {
bb5cf0fc	450	if (pBZ2_bzBuffToBuffDecompress == NULL) {
	451	err("libbz2 unavailable for .bz2 handling\n");
	452	return -1;
	453	}
33716956	454	cd_compression = CDRC_BZ;
	455	tabentry_size = sizeof(u.bztab_entry);
	456	snprintf(table_fname, sizeof(table_fname), "%s.index", cd_fname);
	457	}
	458	else {
	459	err("unhandled extension: %s\n", ext);
	460	return -1;
	461	}
	462
47bf65ab	463	f = fopen(table_fname, "rb");
47bf65ab	464	if (f == NULL) {
33716956	465	err("missing file: %s: ", table_fname);
47bf65ab	466	perror(NULL);
	467	return -1;
	468	}
	469
	470	ret = fseek(f, 0, SEEK_END);
	471	if (ret != 0) {
33716956	472	err("failed to seek\n");
47bf65ab	473	goto fail_table_io;
	474	}
	475	table_size = ftell(f);
	476	fseek(f, 0, SEEK_SET);
	477
33716956	478	if (table_size > 4 * 1024 * 1024) {
33716956	479	err(".table too large\n");
47bf65ab	480	goto fail_table_io;
	481	}
	482
33716956	483	cd_index_len = table_size / tabentry_size;
33716956	484
47bf65ab	485	cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
	486	if (cd_index_table == NULL)
	487	goto fail_table_io;
	488
33716956	489	switch (cd_compression) {
	490	case CDRC_ZLIB:
	491	// a Z.table file is binary where each element represents
	492	// one compressed frame.
	493	// 4 bytes: the offset of the frame in the .Z file
	494	// 2 bytes: the length of the compressed frame
	495	// .znx.table has 4 additional bytes (xa header??)
	496	u.znxtab_entry.dontcare = 0;
	497	for (i = 0; i < cd_index_len; i++) {
	498	ret = fread(&u, 1, tabentry_size, f);
	499	if (ret != tabentry_size) {
	500	err(".table read failed on entry %d/%d\n", i, cd_index_len);
	501	goto fail_table_io_read;
	502	}
	503	cd_index_table[i] = u.ztab_entry.offset;
	504	//if (u.znxtab_entry.dontcare != 0)
	505	// printf("znx %08x!\n", u.znxtab_entry.dontcare);
	506	}
	507	// fake entry, so that we know last compressed block size
	508	cd_index_table[i] = u.ztab_entry.offset + u.ztab_entry.size;
	509	cd_sectors_per_blk = 1;
	510	break;
	511	case CDRC_BZ:
	512	// the .BZ.table file is arranged so that one entry represents
	513	// 10 compressed frames. Each element is a 4 byte unsigned integer
	514	// representing the offset in the .BZ file. Last entry is the size
	515	// of the compressed file.
	516	for (i = 0; i < cd_index_len; i++) {
	517	ret = fread(&u.bztab_entry, 1, sizeof(u.bztab_entry), f);
	518	if (ret != sizeof(u.bztab_entry)) {
	519	err(".table read failed on entry %d/%d\n", i, cd_index_len);
	520	goto fail_table_io_read;
	521	}
	522	cd_index_table[i] = u.bztab_entry;
47bf65ab	523	}
33716956	524	cd_sectors_per_blk = 10;
33716956	525	break;
47bf65ab	526	}
47bf65ab	527
	528	cd_file = fopen(cd_fname, "rb");
	529	if (cd_file == NULL) {
33716956	530	err("failed to open: %s: ", table_fname);
47bf65ab	531	perror(NULL);
	532	goto fail_img;
	533	}
	534	fclose(f);
	535
33716956	536	printf(PFX "Loaded compressed CD Image: %s.\n", cd_fname);
47bf65ab	537
	538	return 0;
	539
	540	fail_img:
	541	fail_table_io_read:
	542	free(cd_index_table);
	543	cd_index_table = NULL;
	544	fail_table_io:
	545	fclose(f);
	546	return -1;
	547	}
	548
	549	#define FUNC(n) { #n, n }
	550
	551	static const struct {
	552	const char *name;
	553	void *func;
	554	} plugin_funcs[] = {
	555	/* CDR */
	556	FUNC(CDRinit),
	557	FUNC(CDRshutdown),
	558	FUNC(CDRopen),
	559	FUNC(CDRclose),
	560	FUNC(CDRgetTN),
	561	FUNC(CDRgetTD),
	562	FUNC(CDRreadTrack),
	563	FUNC(CDRgetBuffer),
	564	FUNC(CDRgetBufferSub),
	565	FUNC(CDRplay),
	566	FUNC(CDRstop),
	567	FUNC(CDRgetStatus),
	568	};
	569
	570	void cdrcimg_set_fname(const char *fname)
	571	{
	572	cd_fname = fname;
	573	}
	574
	575	void cdrcimg_get_sym(const char sym)
	576	{
	577	int i;
	578	for (i = 0; i < sizeof(plugin_funcs) / sizeof(plugin_funcs[0]); i++)
	579	if (strcmp(plugin_funcs[i].name, sym) == 0)
	580	return plugin_funcs[i].func;
	581	return NULL;
	582	}
	583