cdriso: support multidisk eboots

3 files changed, 85 insertions, 11 deletions

diff --git a/frontend/menu.c b/frontend/menu.c
index cfdc62d..25c476d 100644
--- a/frontend/menu.c
+++ b/frontend/menu.c
@@ -28,6 +28,7 @@
 #include "linux/in_evdev.h"
 #include "../libpcsxcore/misc.h"
 #include "../libpcsxcore/cdrom.h"
+#include "../libpcsxcore/cdriso.h"
 #include "../libpcsxcore/psemu_plugin_defs.h"
 #include "../libpcsxcore/new_dynarec/new_dynarec.h"
 #include "../plugins/dfinput/main.h"
@@ -44,6 +45,7 @@ typedef enum
 	MA_MAIN_RESET_GAME,
 	MA_MAIN_LOAD_ROM,
 	MA_MAIN_SWAP_CD,
+	MA_MAIN_SWAP_CD_MULTI,
 	MA_MAIN_RUN_BIOS,
 	MA_MAIN_RUN_EXE,
 	MA_MAIN_CONTROLS,
@@ -1577,6 +1579,7 @@ static int reload_plugins(const char *cdimg)
 	}
 	plugin_call_rearmed_cbs();
 
+	cdrIsoMultidiskCount = 1;
 	CdromId[0] = '\0';
 	CdromLabel[0] = '\0';
 
@@ -1714,6 +1717,24 @@ static int swap_cd_image(void)
 	return 0;
 }
 
+static int swap_cd_multidisk(void)
+{
+	cdrIsoMultidiskSelect++;
+	CdromId[0] = '\0';
+	CdromLabel[0] = '\0';
+
+	CDR_close();
+	if (CDR_open() < 0) {
+		me_update_msg("failed to open cdr plugin");
+		return -1;
+	}
+
+	SetCdOpenCaseTime(time(NULL) + 2);
+	LidInterrupt();
+
+	return 0;
+}
+
 static int main_menu_handler(int id, int keys)
 {
 	switch (id)
@@ -1742,6 +1763,10 @@ static int main_menu_handler(int id, int keys)
 		if (swap_cd_image() == 0)
 			return 1;
 		break;
+	case MA_MAIN_SWAP_CD_MULTI:
+		if (swap_cd_multidisk() == 0)
+			return 1;
+		break;
 	case MA_MAIN_RUN_BIOS:
 		if (run_bios() == 0)
 			return 1;
@@ -1767,9 +1792,10 @@ static int main_menu_handler(int id, int keys)
 
 static menu_entry e_menu_main2[] =
 {
-	mee_handler_id("Change CD image",    MA_MAIN_SWAP_CD,     main_menu_handler),
-	mee_handler_id("Run BIOS",           MA_MAIN_RUN_BIOS,    main_menu_handler),
-	mee_handler_id("Run EXE",            MA_MAIN_RUN_EXE,     main_menu_handler),
+	mee_handler_id("Change CD image",    MA_MAIN_SWAP_CD,       main_menu_handler),
+	mee_handler_id("Next multidisk CD",  MA_MAIN_SWAP_CD_MULTI, main_menu_handler),
+	mee_handler_id("Run BIOS",           MA_MAIN_RUN_BIOS,      main_menu_handler),
+	mee_handler_id("Run EXE",            MA_MAIN_RUN_EXE,       main_menu_handler),
 	mee_handler   ("Memcard manager",    menu_loop_memcards),
 	mee_end,
 };
@@ -1779,6 +1805,7 @@ static int main_menu2_handler(int id, int keys)
 	static int sel = 0;
 
 	me_enable(e_menu_main2, MA_MAIN_SWAP_CD,  ready_to_go);
+	me_enable(e_menu_main2, MA_MAIN_SWAP_CD_MULTI, ready_to_go && cdrIsoMultidiskCount > 1);
 	me_enable(e_menu_main2, MA_MAIN_RUN_BIOS, bios_sel != 0);
 
 	return me_loop_d(e_menu_main2, &sel, NULL, draw_frame_main);
diff --git a/libpcsxcore/cdriso.c b/libpcsxcore/cdriso.c
index 6bf5809..0089cfe 100644
--- a/libpcsxcore/cdriso.c
+++ b/libpcsxcore/cdriso.c
@@ -33,6 +33,9 @@
 #endif
 #include <zlib.h>
 
+unsigned int cdrIsoMultidiskCount;
+unsigned int cdrIsoMultidiskSelect;
+
 static FILE *cdHandle = NULL;
 static FILE *cddaHandle = NULL;
 static FILE *subHandle = NULL;
@@ -724,8 +727,9 @@ static int handlepbp(const char *isofile) {
 		unsigned int size;
 		unsigned int dontcare[6];
 	} index_entry;
-	char psar_sig[9];
+	char psar_sig[11];
 	unsigned int t, cd_length, cdimg_base;
+	unsigned int offsettab[8], psisoimg_offs;
 	const char *ext = NULL;
 	int i, ret;
 
@@ -748,17 +752,56 @@ static int handlepbp(const char *isofile) {
 		goto fail_io;
 	}
 
+	psisoimg_offs = pbp_hdr.psar_offs;
 	fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
-	psar_sig[8] = 0;
-	if (strcmp(psar_sig, "PSISOIMG") != 0) {
+	psar_sig[10] = 0;
+	if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
+		// multidisk image?
+		ret = fseek(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
+		if (ret != 0) {
+			fprintf(stderr, "failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
+			goto fail_io;
+		}
+
+		if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
+			fprintf(stderr, "failed to read offsettab\n");
+			goto fail_io;
+		}
+
+		for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
+			if (offsettab[i] == 0)
+				break;
+		}
+		cdrIsoMultidiskCount = i;
+		if (cdrIsoMultidiskCount == 0) {
+			fprintf(stderr, "multidisk eboot has 0 images?\n");
+			goto fail_io;
+		}
+
+		if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
+			cdrIsoMultidiskSelect = 0;
+
+		psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
+
+		ret = fseek(cdHandle, psisoimg_offs, SEEK_SET);
+		if (ret != 0) {
+			fprintf(stderr, "failed to seek to %x\n", psisoimg_offs);
+			goto fail_io;
+		}
+
+		fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
+		psar_sig[10] = 0;
+	}
+
+	if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 		fprintf(stderr, "bad psar_sig: %s\n", psar_sig);
 		goto fail_io;
 	}
 
 	// seek to TOC
-	ret = fseek(cdHandle, pbp_hdr.psar_offs + 0x800, SEEK_SET);
+	ret = fseek(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 	if (ret != 0) {
-		fprintf(stderr, "failed to seek to %x\n", pbp_hdr.psar_offs);
+		fprintf(stderr, "failed to seek to %x\n", psisoimg_offs + 0x800);
 		goto fail_io;
 	}
 
@@ -791,7 +834,7 @@ static int handlepbp(const char *isofile) {
 	sec2msf(t, ti[numtracks].length);
 
 	// seek to ISO index
-	ret = fseek(cdHandle, pbp_hdr.psar_offs + 0x4000, SEEK_SET);
+	ret = fseek(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 	if (ret != 0) {
 		fprintf(stderr, "failed to seek to ISO index\n");
 		goto fail_io;
@@ -809,7 +852,7 @@ static int handlepbp(const char *isofile) {
 	if (compr_img->index_table == NULL)
 		goto fail_io;
 
-	cdimg_base = pbp_hdr.psar_offs + 0x100000;
+	cdimg_base = psisoimg_offs + 0x100000;
 	for (i = 0; i < compr_img->index_len; i++) {
 		ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 		if (ret != sizeof(index_entry)) {
@@ -849,7 +892,7 @@ static int handlecbin(const char *isofile) {
 		unsigned char rsv_06[2];
 	} ciso_hdr;
 	const char *ext = NULL;
-	unsigned int index, plain;
+	unsigned int index = 0, plain;
 	int i, ret;
 
 	if (strlen(isofile) >= 5)
@@ -1126,6 +1169,7 @@ static long CALLBACK ISOopen(void) {
 	subChanMixed = FALSE;
 	subChanRaw = FALSE;
 	pregapOffset = 0;
+	cdrIsoMultidiskCount = 1;
 
 	CDR_getBuffer = ISOgetBuffer;
 	cdimg_read_func = cdread_normal;
diff --git a/libpcsxcore/cdriso.h b/libpcsxcore/cdriso.h
index 27d1ecd..16ad52f 100644
--- a/libpcsxcore/cdriso.h
+++ b/libpcsxcore/cdriso.h
@@ -28,6 +28,9 @@ extern "C" {
 void cdrIsoInit(void);
 int cdrIsoActive(void);
 
+extern unsigned int cdrIsoMultidiskCount;
+extern unsigned int cdrIsoMultidiskSelect;
+
 #ifdef __cplusplus
 }
 #endif