Added ZSO code, sector cache, and ZISO compressor.

From PR and closes ps2homebrew#641

.clang-format-ignore

@@ -1 +1,3 @@
 ./modules/network/lwnbdsvr/nbd-protocol.h
+./modules/isofs/lz4.c
+./modules/isofs/lz4.h

Makefile

@@ -64,7 +64,7 @@ endif
 endif
 
 FRONTEND_OBJS = pad.o fntsys.o renderman.o menusys.o OSDHistory.o system.o lang.o lang_internal.o config.o hdd.o dialogs.o \
-		dia.o ioman.o texcache.o themes.o supportbase.o bdmsupport.o ethsupport.o hddsupport.o \
+		dia.o ioman.o texcache.o themes.o supportbase.o bdmsupport.o ethsupport.o hddsupport.o zso.o lz4.o \
 		appsupport.o gui.o guigame.o textures.o opl.o atlas.o nbns.o httpclient.o gsm.o cheatman.o sound.o ps2cnf.o
 
 IOP_OBJS =	iomanx.o filexio.o ps2fs.o usbd.o bdmevent.o \

README.md

@@ -15,7 +15,7 @@ Open PS2 Loader (OPL) is a 100% Open source game and application loader for
 the PS2 and PS3 units. It supports three categories of devices: USB mass
 storage devices, SMB shares and the PlayStation 2 HDD unit. USB devices and
 SMB shares support USBExtreme and \*.ISO formats while PS2 HDD supports HDLoader
-format. It's now the most compatible homebrew loader.
+format, all devices also support ZSO format (compressed ISO). It's now the most compatible homebrew loader.
 
 OPL developed continuously - anyone can contribute improvements to
 the project due to its open-source nature.
@@ -219,6 +219,37 @@ Not supported.
 </p>
 </details>
 
+<details>
+  <summary> <b> ZSO Format </b> </summary>
+<p>
+
+As of version 1.2.0, compressed ISO files in ZSO format is supported by OPL.
+
+To handle ZSO files, a python script (ziso.py) is included in the pc folder of this repository.
+It requires Python 3 and the LZ4 library:
+
+  ```sh
+pip install lz4
+```
+
+To compress an ISO file to ZSO:
+
+  ```sh
+python ziso.py -c 2 "input.iso" "output.zso"
+```
+
+To decompress a ZSO back to the original ISO:
+
+```sh
+python ziso.py -c 0 "input.zso" "output.iso"
+```
+
+You can copy ZSO files to the same folder as your ISOs and they will be detected by OPL.
+To install onto internal HDD, you can use the latest version of HDL-Dump.
+
+</p>
+</details>
+
 <details>
   <summary> <b> PS3 BC </b> </summary>
 <p>

include/config.h

@@ -89,6 +89,9 @@ enum CONFIG_INDEX {
 #define CONFIG_OPL_HDD_MODE             "hdd_mode"
 #define CONFIG_OPL_ETH_MODE             "eth_mode"
 #define CONFIG_OPL_APP_MODE             "app_mode"
+#define CONFIG_OPL_BDM_CACHE            "bdm_cache"
+#define CONFIG_OPL_HDD_CACHE            "hdd_cache"
+#define CONFIG_OPL_SMB_CACHE            "smb_cache"
 #define CONFIG_OPL_ENABLE_ILINK         "enable_ilink"
 #define CONFIG_OPL_ENABLE_MX4SIO        "enable_mx4sio"
 #define CONFIG_OPL_SWAP_SEL_BUTTON      "swap_select_btn"

include/dia.h

@@ -49,7 +49,7 @@ struct UIItem
         struct
         {
             const char *text;
-            int stringId; // if zero, the text is used
+            int stringId; // if negative, the text is used
         } label;
 
         struct

include/dialogs.h

@@ -34,6 +34,9 @@ enum UI_ITEMS {
     CFG_HDDMODE,
     CFG_ETHMODE,
     CFG_APPMODE,
+    CFG_BDMCACHE,
+    CFG_HDDCACHE,
+    CFG_SMBCACHE,
     CFG_ENABLEILK,
     CFG_ENABLEMX4SIO,
     CFG_LASTPLAYED,

include/opl.h

@@ -115,6 +115,9 @@ extern int gBDMStartMode;
 extern int gHDDStartMode;
 extern int gETHStartMode;
 extern int gAPPStartMode;
+extern int bdmCacheSize;
+extern int hddCacheSize;
+extern int smbCacheSize;
 
 extern int gEnableILK;
 extern int gEnableMX4SIO;

modules/iopcore/cdvdman/Makefile

@@ -1,4 +1,4 @@
-IOP_OBJS = cdvdman.o ioops.o ncmd.o scmd.o searchfile.o streaming.o ioplib_util.o smsutils.o imports.o exports.o
+IOP_OBJS = cdvdman.o ioops.o ncmd.o scmd.o searchfile.o streaming.o ioplib_util.o smsutils.o imports.o exports.o ../../isofs/zso.o ../../isofs/lz4.o
 USE_DEV9 ?= 0
 
 ifeq ($(USE_HDD),1)