From 1d2757f476f5c10229e10fa16107d73b0c801fa5 Mon Sep 17 00:00:00 2001
From: negativeExponent
Date: Wed, 4 Nov 2020 21:16:24 +0800
Subject: CHD: Support for precache mode CD access method

https://github.com/libretro/pcsx_rearmed/issues/261
---
 libpcsxcore/cdriso.c    | 5 ++++-
 libpcsxcore/psxcommon.h | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

(limited to 'libpcsxcore')

diff --git a/libpcsxcore/cdriso.c b/libpcsxcore/cdriso.c
index d8799db..9e70ddf 100644
--- a/libpcsxcore/cdriso.c
+++ b/libpcsxcore/cdriso.c
@@ -1057,7 +1057,10 @@ static int handlechd(const char *isofile) {
 		goto fail_io;
 
 	if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
-      goto fail_io;
+		goto fail_io;
+
+	if (Config.CHD_Precache && (chd_precache(chd_img->chd) != CHDERR_NONE))
+		goto fail_io;
 
    chd_img->header = chd_get_header(chd_img->chd);
 
diff --git a/libpcsxcore/psxcommon.h b/libpcsxcore/psxcommon.h
index cb417d4..708d984 100644
--- a/libpcsxcore/psxcommon.h
+++ b/libpcsxcore/psxcommon.h
@@ -121,6 +121,7 @@ typedef struct {
 	boolean PsxAuto;
 	boolean Cdda;
 	boolean AsyncCD;
+	boolean CHD_Precache; /* loads disk image into memory, works with CHD only. */
 	boolean HLE;
 	boolean SlowBoot;
 	boolean Debug;
-- 
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