[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>
#if !defined(_WIN32) && !defined(NO_DYLIB)
#include <dlfcn.h>
#endif

#include "cdrcimg.h"

#undef CALLBACK
#define CALLBACK

#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;
}

static int uncompress2_pcsx(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_pcsx(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>
78de2879	15	#if !defined(_WIN32) && !defined(NO_DYLIB)
bb5cf0fc	16	#include <dlfcn.h>
fc99395c	17	#endif
47bf65ab	18
	19	#include "cdrcimg.h"
	20
78de2879	21	#undef CALLBACK
	22	#define CALLBACK
	23
33716956	24	#define PFX "cdrcimg: "
	25	#define err(f, ...) fprintf(stderr, PFX f, ##__VA_ARGS__)
	26
47bf65ab	27	#define CD_FRAMESIZE_RAW 2352
47bf65ab	28
33716956	29	enum {
	30	CDRC_ZLIB,
	31	CDRC_ZLIB2,
	32	CDRC_BZ,
	33	};
	34
47bf65ab	35	static const char *cd_fname;
	36	static unsigned int *cd_index_table;
	37	static unsigned int cd_index_len;
33716956	38	static unsigned int cd_sectors_per_blk;
33716956	39	static int cd_compression;
47bf65ab	40	static FILE *cd_file;
47bf65ab	41
bb5cf0fc	42	static int (pBZ2_bzBuffToBuffDecompress)(char dest, unsigned int destLen, char source,
	43	unsigned int sourceLen, int small, int verbosity);
	44
33716956	45	static struct {
	46	unsigned char raw[16][CD_FRAMESIZE_RAW];
	47	unsigned char compressed[CD_FRAMESIZE_RAW * 16 + 100];
	48	} *cdbuffer;
	49	static int current_block, current_sect_in_blk;
47bf65ab	50
47bf65ab	51	struct CdrStat;
003cfc63	52	extern long CALLBACK CDR__getStatus(struct CdrStat *stat);
47bf65ab	53
	54	struct CdrStat
	55	{
c668f248	56	unsigned int Type;
c668f248	57	unsigned int Status;
47bf65ab	58	unsigned char Time[3]; // current playing time
	59	};
	60
	61	struct trackinfo {
	62	enum {DATA, CDDA} type;
	63	char start[3]; // MSF-format
	64	char length[3]; // MSF-format
	65	};
	66
	67	#define MAXTRACKS 100 /* How many tracks can a CD hold? */
	68
	69	static int numtracks = 0;
	70
	71	#define btoi(b) ((b) / 16 * 10 + (b) % 16) /* BCD to u_char */
	72	#define MSF2SECT(m, s, f) (((m) * 60 + (s) - 2) * 75 + (f))
	73
	74	// return Starting and Ending Track
	75	// buffer:
	76	// byte 0 - start track
	77	// byte 1 - end track
	78	static long CDRgetTN(unsigned char *buffer)
	79	{
	80	buffer[0] = 1;
	81	buffer[1] = numtracks > 0 ? numtracks : 1;
	82
	83	return 0;
	84	}
	85
	86	// return Track Time
	87	// buffer:
	88	// byte 0 - frame
	89	// byte 1 - second
	90	// byte 2 - minute
	91	static long CDRgetTD(unsigned char track, unsigned char *buffer)
	92	{
	93	buffer[2] = 0;
	94	buffer[1] = 2;
	95	buffer[0] = 0;
	96
	97	return 0;
	98	}
	99
2dd6a826	100	static int uncompress2_pcsx(void out, unsigned long out_size, void *in, unsigned long in_size)
33716956	101	{
	102	static z_stream z;
	103	int ret = 0;
	104
	105	if (z.zalloc == NULL) {
	106	// XXX: one-time leak here..
	107	z.next_in = Z_NULL;
	108	z.avail_in = 0;
	109	z.zalloc = Z_NULL;
	110	z.zfree = Z_NULL;
	111	z.opaque = Z_NULL;
	112	ret = inflateInit2(&z, -15);
	113	}
	114	else
	115	ret = inflateReset(&z);
	116	if (ret != Z_OK)
	117	return ret;
	118
	119	z.next_in = in;
	120	z.avail_in = in_size;
	121	z.next_out = out;
	122	z.avail_out = *out_size;
	123
	124	ret = inflate(&z, Z_NO_FLUSH);
	125	//inflateEnd(&z);
	126
	127	*out_size -= z.avail_out;
	128	return ret == 1 ? 0 : ret;
	129	}
	130
47bf65ab	131	// read track
	132	// time: byte 0 - minute; byte 1 - second; byte 2 - frame
	133	// uses bcd format
	134	static long CDRreadTrack(unsigned char *time)
	135	{
	136	unsigned int start_byte, size;
	137	unsigned long cdbuffer_size;
33716956	138	int ret, sector, block;
47bf65ab	139
	140	if (cd_file == NULL)
	141	return -1;
	142
	143	sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
33716956	144
	145	// avoid division if possible
	146	switch (cd_sectors_per_blk) {
	147	case 1:
	148	block = sector;
	149	current_sect_in_blk = 0;
	150	break;
	151	case 10:
	152	block = sector / 10;
	153	current_sect_in_blk = sector % 10;
	154	break;
	155	case 16:
	156	block = sector >> 4;
	157	current_sect_in_blk = sector & 15;
	158	break;
	159	default:
	160	err("unhandled cd_sectors_per_blk: %d\n", cd_sectors_per_blk);
	161	return -1;
	162	}
	163
	164	if (block == current_block) {
47bf65ab	165	// it's already there, nothing to do
	166	//printf("hit sect %d\n", sector);
	167	return 0;
	168	}
	169
33716956	170	if (sector >= cd_index_len * cd_sectors_per_blk) {
33716956	171	err("sector %d is past track end\n", sector);
47bf65ab	172	return -1;
	173	}
	174
33716956	175	start_byte = cd_index_table[block];
47bf65ab	176	if (fseek(cd_file, start_byte, SEEK_SET) != 0) {
33716956	177	err("seek error for block %d at %x: ",
33716956	178	block, start_byte);
47bf65ab	179	perror(NULL);
	180	return -1;
	181	}
	182
33716956	183	size = cd_index_table[block + 1] - start_byte;
	184	if (size > sizeof(cdbuffer->compressed)) {
	185	err("block %d is too large: %u\n", block, size);
47bf65ab	186	return -1;
	187	}
	188
33716956	189	if (fread(cdbuffer->compressed, 1, size, cd_file) != size) {
33716956	190	err("read error for block %d at %x: ", block, start_byte);
47bf65ab	191	perror(NULL);
	192	return -1;
	193	}
	194
33716956	195	cdbuffer_size = sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk;
	196	switch (cd_compression) {
	197	case CDRC_ZLIB:
	198	ret = uncompress(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
	199	break;
	200	case CDRC_ZLIB2:
2dd6a826	201	ret = uncompress2_pcsx(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
33716956	202	break;
33716956	203	case CDRC_BZ:
bb5cf0fc	204	ret = pBZ2_bzBuffToBuffDecompress((char )cdbuffer->raw, (unsigned int )&cdbuffer_size,
33716956	205	(char *)cdbuffer->compressed, size, 0, 0);
	206	break;
	207	default:
	208	err("bad cd_compression: %d\n", cd_compression);
	209	return -1;
	210	}
	211
47bf65ab	212	if (ret != 0) {
33716956	213	err("uncompress failed with %d for block %d, sector %d\n",
33716956	214	ret, block, sector);
47bf65ab	215	return -1;
47bf65ab	216	}
33716956	217	if (cdbuffer_size != sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk)
33716956	218	err("cdbuffer_size: %lu != %d, sector %d\n", cdbuffer_size,
c979c3ee	219	(int)sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk, sector);
47bf65ab	220
47bf65ab	221	// done at last!
33716956	222	current_block = block;
47bf65ab	223	return 0;
	224	}
	225
	226	// return read track
	227	static unsigned char *CDRgetBuffer(void)
	228	{
33716956	229	return cdbuffer->raw[current_sect_in_blk] + 12;
47bf65ab	230	}
	231
	232	// plays cdda audio
	233	// sector: byte 0 - minute; byte 1 - second; byte 2 - frame
	234	// does NOT uses bcd format
	235	static long CDRplay(unsigned char *time)
	236	{
	237	return 0;
	238	}
	239
	240	// stops cdda audio
	241	static long CDRstop(void)
	242	{
	243	return 0;
	244	}
	245
	246	// gets subchannel data
	247	static unsigned char* CDRgetBufferSub(void)
	248	{
	249	return NULL;
	250	}
	251
	252	static long CDRgetStatus(struct CdrStat *stat) {
	253	CDR__getStatus(stat);
	254
	255	stat->Type = 0x01;
	256
	257	return 0;
	258	}
	259
	260	static long CDRclose(void)
	261	{
	262	if (cd_file != NULL) {
	263	fclose(cd_file);
	264	cd_file = NULL;
	265	}
	266	if (cd_index_table != NULL) {
	267	free(cd_index_table);
	268	cd_index_table = NULL;
	269	}
	270	return 0;
	271	}
	272
	273	static long CDRshutdown(void)
	274	{
	275	return CDRclose();
	276	}
	277
	278	static long CDRinit(void)
	279	{
33716956	280	if (cdbuffer == NULL) {
	281	cdbuffer = malloc(sizeof(*cdbuffer));
	282	if (cdbuffer == NULL) {
	283	err("OOM\n");
	284	return -1;
	285	}
	286	}
c4052f4d	287	#if !defined(_WIN32) && !defined(NO_DYLIB)
bb5cf0fc	288	if (pBZ2_bzBuffToBuffDecompress == NULL) {
	289	void *h = dlopen("/usr/lib/libbz2.so.1", RTLD_LAZY);
	290	if (h == NULL)
	291	h = dlopen("./lib/libbz2.so.1", RTLD_LAZY);
	292	if (h != NULL) {
	293	pBZ2_bzBuffToBuffDecompress = dlsym(h, "BZ2_bzBuffToBuffDecompress");
	294	if (pBZ2_bzBuffToBuffDecompress == NULL) {
	295	err("dlsym bz2: %s", dlerror());
	296	dlclose(h);
	297	}
	298	}
	299	}
003cfc63	300	#endif
33716956	301	return 0;
	302	}
	303
	304	static long handle_eboot(void)
	305	{
	306	struct {
	307	unsigned int sig;
	308	unsigned int dontcare[8];
	309	unsigned int psar_offs;
	310	} pbp_hdr;
	311	struct {
	312	unsigned int offset;
	313	unsigned int size;
	314	unsigned int dontcare[6];
	315	} index_entry;
	316	char psar_sig[9];
	317	unsigned int cdimg_base;
	318	int i, ret;
	319	FILE *f;
	320
226a5691	321	f = fopen(cd_fname, "rb");
33716956	322	if (f == NULL) {
	323	err("missing file: %s: ", cd_fname);
	324	perror(NULL);
	325	return -1;
	326	}
	327
	328	ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), f);
	329	if (ret != sizeof(pbp_hdr)) {
	330	err("failed to read pbp\n");
	331	goto fail_io;
	332	}
	333
	334	ret = fseek(f, pbp_hdr.psar_offs, SEEK_SET);
	335	if (ret != 0) {
	336	err("failed to seek to %x\n", pbp_hdr.psar_offs);
	337	goto fail_io;
	338	}
	339
	340	ret = fread(psar_sig, 1, sizeof(psar_sig), f);
	341	if (ret != sizeof(psar_sig)) {
	342	err("failed to read psar_sig\n");
	343	goto fail_io;
	344	}
	345
	346	psar_sig[8] = 0;
	347	if (strcmp(psar_sig, "PSISOIMG") != 0) {
	348	err("bad psar_sig: %s\n", psar_sig);
	349	goto fail_io;
	350	}
	351
	352	// seek to ISO index
	353	ret = fseek(f, 0x4000 - sizeof(psar_sig), SEEK_CUR);
	354	if (ret != 0) {
	355	err("failed to seek to ISO index\n");
	356	goto fail_io;
	357	}
	358
	359	cd_index_len = (0x100000 - 0x4000) / sizeof(index_entry);
	360	cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
	361	if (cd_index_table == NULL)
	362	goto fail_io;
	363
	364	cdimg_base = pbp_hdr.psar_offs + 0x100000;
	365	for (i = 0; i < cd_index_len; i++) {
	366	ret = fread(&index_entry, 1, sizeof(index_entry), f);
	367	if (ret != sizeof(index_entry)) {
	368	err("failed to read index_entry #%d\n", i);
	369	goto fail_index;
	370	}
	371
	372	if (index_entry.size == 0)
	373	break;
	374
	375	cd_index_table[i] = cdimg_base + index_entry.offset;
	376	}
	377	cd_index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
	378
	379	cd_compression = CDRC_ZLIB2;
	380	cd_sectors_per_blk = 16;
	381	cd_file = f;
	382
	383	printf(PFX "Loaded EBOOT CD Image: %s.\n", cd_fname);
	384	return 0;
	385
386	fail_index:
387	free(cd_index_table);
388	cd_index_table = NULL;
389	fail_io:
390	fclose(f);
391	return -1;
47bf65ab	392	}
	393
	394	// This function is invoked by the front-end when opening an ISO
	395	// file for playback
	396	static long CDRopen(void)
	397	{
33716956	398	union {
	399	struct {
	400	unsigned int offset;
	401	unsigned short size;
	402	} __attribute__((packed)) ztab_entry;
	403	struct {
	404	unsigned int offset;
	405	unsigned short size;
	406	unsigned int dontcare;
	407	} __attribute__((packed)) znxtab_entry;
	408	unsigned int bztab_entry;
	409	} u;
	410	int tabentry_size;
47bf65ab	411	char table_fname[256];
	412	long table_size;
	413	int i, ret;
33716956	414	char *ext;
33716956	415	FILE *f = NULL;
47bf65ab	416
	417	if (cd_file != NULL)
	418	return 0; // it's already open
	419
	420	numtracks = 0;
33716956	421	current_block = -1;
33716956	422	current_sect_in_blk = 0;
47bf65ab	423
	424	if (cd_fname == NULL)
	425	return -1;
	426
33716956	427	ext = strrchr(cd_fname, '.');
	428	if (ext == NULL)
	429	return -1;
	430
	431	if (strcasecmp(ext, ".pbp") == 0) {
	432	return handle_eboot();
	433	}
	434
	435	// pocketiso stuff
	436	else if (strcasecmp(ext, ".z") == 0) {
	437	cd_compression = CDRC_ZLIB;
	438	tabentry_size = sizeof(u.ztab_entry);
	439	snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
	440	}
	441	else if (strcasecmp(ext, ".znx") == 0) {
	442	cd_compression = CDRC_ZLIB;
	443	tabentry_size = sizeof(u.znxtab_entry);
	444	snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
	445	}
	446	else if (strcasecmp(ext, ".bz") == 0) {
bb5cf0fc	447	if (pBZ2_bzBuffToBuffDecompress == NULL) {
	448	err("libbz2 unavailable for .bz2 handling\n");
	449	return -1;
	450	}
33716956	451	cd_compression = CDRC_BZ;
	452	tabentry_size = sizeof(u.bztab_entry);
	453	snprintf(table_fname, sizeof(table_fname), "%s.index", cd_fname);
	454	}
	455	else {
	456	err("unhandled extension: %s\n", ext);
	457	return -1;
	458	}
	459
226a5691	460	f = fopen(table_fname, "rb");
47bf65ab	461	if (f == NULL) {
33716956	462	err("missing file: %s: ", table_fname);
47bf65ab	463	perror(NULL);
	464	return -1;
	465	}
	466
	467	ret = fseek(f, 0, SEEK_END);
	468	if (ret != 0) {
33716956	469	err("failed to seek\n");
47bf65ab	470	goto fail_table_io;
	471	}
	472	table_size = ftell(f);
	473	fseek(f, 0, SEEK_SET);
	474
33716956	475	if (table_size > 4 * 1024 * 1024) {
33716956	476	err(".table too large\n");
47bf65ab	477	goto fail_table_io;
	478	}
	479
33716956	480	cd_index_len = table_size / tabentry_size;
33716956	481
47bf65ab	482	cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
	483	if (cd_index_table == NULL)
	484	goto fail_table_io;
	485
33716956	486	switch (cd_compression) {
	487	case CDRC_ZLIB:
	488	// a Z.table file is binary where each element represents
	489	// one compressed frame.
	490	// 4 bytes: the offset of the frame in the .Z file
	491	// 2 bytes: the length of the compressed frame
	492	// .znx.table has 4 additional bytes (xa header??)
	493	u.znxtab_entry.dontcare = 0;
	494	for (i = 0; i < cd_index_len; i++) {
	495	ret = fread(&u, 1, tabentry_size, f);
	496	if (ret != tabentry_size) {
	497	err(".table read failed on entry %d/%d\n", i, cd_index_len);
	498	goto fail_table_io_read;
	499	}
	500	cd_index_table[i] = u.ztab_entry.offset;
	501	//if (u.znxtab_entry.dontcare != 0)
	502	// printf("znx %08x!\n", u.znxtab_entry.dontcare);
	503	}
	504	// fake entry, so that we know last compressed block size
	505	cd_index_table[i] = u.ztab_entry.offset + u.ztab_entry.size;
	506	cd_sectors_per_blk = 1;
	507	break;
	508	case CDRC_BZ:
	509	// the .BZ.table file is arranged so that one entry represents
	510	// 10 compressed frames. Each element is a 4 byte unsigned integer
	511	// representing the offset in the .BZ file. Last entry is the size
	512	// of the compressed file.
	513	for (i = 0; i < cd_index_len; i++) {
	514	ret = fread(&u.bztab_entry, 1, sizeof(u.bztab_entry), f);
	515	if (ret != sizeof(u.bztab_entry)) {
	516	err(".table read failed on entry %d/%d\n", i, cd_index_len);
	517	goto fail_table_io_read;
	518	}
	519	cd_index_table[i] = u.bztab_entry;
47bf65ab	520	}
33716956	521	cd_sectors_per_blk = 10;
33716956	522	break;
47bf65ab	523	}
47bf65ab	524
226a5691	525	cd_file = fopen(cd_fname, "rb");
47bf65ab	526	if (cd_file == NULL) {
33716956	527	err("failed to open: %s: ", table_fname);
47bf65ab	528	perror(NULL);
	529	goto fail_img;
	530	}
	531	fclose(f);
	532
33716956	533	printf(PFX "Loaded compressed CD Image: %s.\n", cd_fname);
47bf65ab	534
	535	return 0;
	536
	537	fail_img:
	538	fail_table_io_read:
	539	free(cd_index_table);
	540	cd_index_table = NULL;
	541	fail_table_io:
	542	fclose(f);
	543	return -1;
	544	}
	545
	546	#define FUNC(n) { #n, n }
	547
	548	static const struct {
	549	const char *name;
	550	void *func;
	551	} plugin_funcs[] = {
	552	/* CDR */
	553	FUNC(CDRinit),
	554	FUNC(CDRshutdown),
	555	FUNC(CDRopen),
	556	FUNC(CDRclose),
	557	FUNC(CDRgetTN),
	558	FUNC(CDRgetTD),
	559	FUNC(CDRreadTrack),
	560	FUNC(CDRgetBuffer),
	561	FUNC(CDRgetBufferSub),
	562	FUNC(CDRplay),
	563	FUNC(CDRstop),
	564	FUNC(CDRgetStatus),
	565	};
	566
	567	void cdrcimg_set_fname(const char *fname)
	568	{
	569	cd_fname = fname;
	570	}
	571
	572	void cdrcimg_get_sym(const char sym)
	573	{
	574	int i;
	575	for (i = 0; i < sizeof(plugin_funcs) / sizeof(plugin_funcs[0]); i++)
	576	if (strcmp(plugin_funcs[i].name, sym) == 0)
	577	return plugin_funcs[i].func;
	578	return NULL;
	579	}
	580