From ae4e7dc990c2acd9cb208dd8fb02f1c96f915b7c Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Tue, 15 Feb 2011 14:14:00 +0200
Subject: [PATCH] add redump.org SBI support

This is based on PCSX-Reloaded (as usual) but done a bit different,
loaded as .sub file instead of as ppf patch.
---
 libpcsxcore/cdriso.c | 24 ++++++++++++++++++++++++
 libpcsxcore/cdrom.c  |  3 +--
 libpcsxcore/ppf.c    | 43 +++++++++++++++++++++++++++++++++++++++++++
 libpcsxcore/ppf.h    | 15 +++++++++++++++
 4 files changed, 83 insertions(+), 2 deletions(-)

diff --git a/libpcsxcore/cdriso.c b/libpcsxcore/cdriso.c
index 1e9adede..2d371dd2 100644
--- a/libpcsxcore/cdriso.c
+++ b/libpcsxcore/cdriso.c
@@ -22,6 +22,7 @@
 #include "plugins.h"
 #include "cdrom.h"
 #include "cdriso.h"
+#include "ppf.h"
 
 #ifdef _WIN32
 #include <process.h>
@@ -685,6 +686,25 @@ static int opensubfile(const char *isoname) {
 	return 0;
 }
 
+static int opensbifile(const char *isoname) {
+	char		sbiname[MAXPATHLEN];
+	int		s;
+
+	strncpy(sbiname, isoname, sizeof(sbiname));
+	sbiname[MAXPATHLEN - 1] = '\0';
+	if (strlen(sbiname) >= 4) {
+		strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
+	}
+	else {
+		return -1;
+	}
+
+	fseek(cdHandle, 0, SEEK_END);
+	s = ftell(cdHandle) / 2352;
+
+	return LoadSBI(sbiname, s);
+}
+
 static void PrintTracks(void) {
 	int i;
 
@@ -730,6 +750,9 @@ static long CALLBACK ISOopen(void) {
 	if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
 		SysPrintf("[+sub]");
 	}
+	if (opensbifile(GetIsoFile()) == 0) {
+		SysPrintf("[+sbi]");
+	}
 
 	SysPrintf(".\n");
 
@@ -765,6 +788,7 @@ static long CALLBACK ISOclose(void) {
 		}
 	}
 	numtracks = 0;
+	UnloadSBI();
 
 	return 0;
 }
diff --git a/libpcsxcore/cdrom.c b/libpcsxcore/cdrom.c
index 0de7ecce..ee74835c 100644
--- a/libpcsxcore/cdrom.c
+++ b/libpcsxcore/cdrom.c
@@ -988,10 +988,9 @@ void cdrInterrupt() {
 			}
 
 			// redump.org - wipe time
-			/*if( !cdr.Play && CheckSBI(cdr.Result+5) ) {
+			if( !cdr.Play && CheckSBI(cdr.Result+5) ) {
 				memset( cdr.Result+2, 0, 6 );
 			}
-			*/
 
 			cdr.Stat = Acknowledge;
 			break;
diff --git a/libpcsxcore/ppf.c b/libpcsxcore/ppf.c
index 45c8733c..268ed1cb 100644
--- a/libpcsxcore/ppf.c
+++ b/libpcsxcore/ppf.c
@@ -330,3 +330,46 @@ void BuildPPFCache() {
 
 	SysPrintf(_("Loaded PPF %d.0 patch: %s.\n"), method + 1, szPPF);
 }
+
+// redump.org SBI files, slightly different handling from PCSX-Reloaded
+unsigned char *sbi_sectors;
+
+int LoadSBI(const char *fname, int sector_count) {
+	char buffer[16], sbifile[MAXPATHLEN];
+	FILE *sbihandle;
+	u8 sbitime[3];
+	int s;
+
+	sbihandle = fopen(fname, "rb");
+	if (sbihandle == NULL)
+		return -1;
+
+if (sbi_sectors != NULL) printf("sbi_sectors?\n");
+	sbi_sectors = calloc(1, sector_count / 8);
+	if (sbi_sectors == NULL)
+		return -1;
+
+	// 4-byte SBI header
+	fread(buffer, 1, 4, sbihandle);
+	while (!feof(sbihandle)) {
+		fread(sbitime, 1, 3, sbihandle);
+		fread(buffer, 1, 11, sbihandle);
+
+		s = MSF2SECT(btoi(sbitime[0]), btoi(sbitime[1]), btoi(sbitime[2]));
+		if (s < sector_count)
+			sbi_sectors[s >> 3] |= 1 << (s&7);
+		else
+			SysPrintf(_("SBI sector %d >= %d?\n"), s, sector_count);
+	}
+
+	fclose(sbihandle);
+
+	return 0;
+}
+
+void UnloadSBI(void) {
+	if (sbi_sectors) {
+		free(sbi_sectors);
+		sbi_sectors = NULL;
+	}
+}
diff --git a/libpcsxcore/ppf.h b/libpcsxcore/ppf.h
index f578028b..fdb11eba 100644
--- a/libpcsxcore/ppf.h
+++ b/libpcsxcore/ppf.h
@@ -27,6 +27,21 @@ void BuildPPFCache();
 void FreePPFCache();
 void CheckPPFCache(unsigned char *pB, unsigned char m, unsigned char s, unsigned char f);
 
+int LoadSBI(const char *fname, int sector_count);
+void UnloadSBI(void);
+
+extern unsigned char *sbi_sectors;
+
+static inline int CheckSBI(const u8 *t)
+{
+	int s;
+	if (sbi_sectors == NULL)
+		return 0;
+
+	s = MSF2SECT(btoi(t[0]), btoi(t[1]), btoi(t[2]));
+	return (sbi_sectors[s >> 3] >> (s & 7)) & 1;
+}
+
 #ifdef __cplusplus
 }
 #endif
-- 
2.39.5