cdriso: support multidisk eboots

[pcsx_rearmed.git] / libpcsxcore / cdriso.c

diff --git a/libpcsxcore/cdriso.c b/libpcsxcore/cdriso.c
index 6bf5809..0089cfe 100644 (file)
--- 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;