Proof-of-concept: libchdr works on Windows

.gitmodules

@@ -50,3 +50,6 @@
 [submodule "ext/naett"]
 	path = ext/naett
 	url = https://github.com/erkkah/naett.git
+[submodule "ext/libchdr"]
+	path = ext/libchdr
+	url = https://github.com/rtissera/libchdr.git

Common/Common.vcxproj.filters

@@ -1073,6 +1073,9 @@
     <Filter Include="ext\naett">
       <UniqueIdentifier>{34f45db9-5c08-49cb-b349-b9e760ce3213}</UniqueIdentifier>
     </Filter>
+    <Filter Include="ext\libchdr">
+      <UniqueIdentifier>{b681797d-7747-487f-b448-5ef5b2d2805b}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
   <ItemGroup>
     <Text Include="..\ext\libpng17\CMakeLists.txt">

Core/Core.vcxproj

@@ -138,7 +138,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
-      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\x86\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ext\libchdr\include;..\ffmpeg\Windows\x86\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_32=1;_M_IX86=1;_DEBUG;_LIB;_UNICODE;UNICODE;MINIUPNP_STATICLIB;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <EnableEnhancedInstructionSet>StreamingSIMDExtensions2</EnableEnhancedInstructionSet>
       <FloatingPointModel>Precise</FloatingPointModel>
@@ -165,7 +165,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
-      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\x86_64\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib;../ext/zstd/lib</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ext\libchdr\include;..\ffmpeg\Windows\x86_64\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib;../ext/zstd/lib</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_64=1;_M_X64=1;_DEBUG;_LIB;_UNICODE;UNICODE;MINIUPNP_STATICLIB;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <EnableEnhancedInstructionSet>NotSet</EnableEnhancedInstructionSet>
       <FloatingPointModel>Precise</FloatingPointModel>
@@ -193,7 +193,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
-      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\aarch64\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ext\libchdr\include;..\ffmpeg\Windows\aarch64\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_64=1;_DEBUG;_LIB;_UNICODE;UNICODE;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <EnableEnhancedInstructionSet>NotSet</EnableEnhancedInstructionSet>
       <FloatingPointModel>Precise</FloatingPointModel>
@@ -221,7 +221,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
-      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\arm\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ext\libchdr\include;..\ffmpeg\Windows\arm\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_32=1;_DEBUG;_LIB;_UNICODE;UNICODE;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <EnableEnhancedInstructionSet>NotSet</EnableEnhancedInstructionSet>
       <FloatingPointModel>Precise</FloatingPointModel>
@@ -253,7 +253,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\x86\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ext\libchdr\include;..\ffmpeg\Windows\x86\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
       <BufferSecurityCheck>false</BufferSecurityCheck>
       <EnableEnhancedInstructionSet>StreamingSIMDExtensions2</EnableEnhancedInstructionSet>
       <FloatingPointModel>Precise</FloatingPointModel>
@@ -286,7 +286,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\x86_64\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib;../ext/zstd/lib</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ext\libchdr\include;..\ffmpeg\Windows\x86_64\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib;../ext/zstd/lib</AdditionalIncludeDirectories>
       <EnableEnhancedInstructionSet>NotSet</EnableEnhancedInstructionSet>
       <FloatingPointModel>Precise</FloatingPointModel>
       <BufferSecurityCheck>false</BufferSecurityCheck>
@@ -321,7 +321,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\aarch64\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ext\libchdr\include;..\ffmpeg\Windows\aarch64\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
       <EnableEnhancedInstructionSet>NotSet</EnableEnhancedInstructionSet>
       <FloatingPointModel>Precise</FloatingPointModel>
       <BufferSecurityCheck>false</BufferSecurityCheck>
@@ -356,7 +356,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\arm\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ext\libchdr\include;..\ffmpeg\Windows\arm\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
       <EnableEnhancedInstructionSet>NotSet</EnableEnhancedInstructionSet>
       <FloatingPointModel>Precise</FloatingPointModel>
       <BufferSecurityCheck>false</BufferSecurityCheck>
@@ -1466,6 +1466,9 @@
     <ProjectReference Include="..\ext\libarmips.vcxproj">
       <Project>{129e5e2b-39c1-4d84-96fe-dfd22dbb4a25}</Project>
     </ProjectReference>
+    <ProjectReference Include="..\ext\libchdr.vcxproj">
+      <Project>{956f1f48-b612-46d8-89ee-96996dcd9383}</Project>
+    </ProjectReference>
     <ProjectReference Include="..\ext\miniupnpc.vcxproj">
       <Project>{d8a71225-178b-424e-96c1-cc3be2c1b047}</Project>
     </ProjectReference>

Core/FileSystems/BlockDevices.cpp

@@ -24,8 +24,11 @@
 #include "Common/System/OSD.h"
 #include "Common/Log.h"
 #include "Common/Swap.h"
+#include "Common/File/FileUtil.h"
+#include "Common/File/DirListing.h"
 #include "Core/Loaders.h"
 #include "Core/FileSystems/BlockDevices.h"
+#include "libchdr/chd.h"
 
 extern "C"
 {
@@ -37,20 +40,29 @@ extern "C"
 std::mutex NPDRMDemoBlockDevice::mutex_;
 
 BlockDevice *constructBlockDevice(FileLoader *fileLoader) {
-	// Check for CISO
 	if (!fileLoader->Exists())
 		return nullptr;
-	char buffer[4]{};
+	char buffer[8]{};
-	size_t size = fileLoader->ReadAt(0, 1, 4, buffer);
+	size_t size = fileLoader->ReadAt(0, 1, 8, buffer);
-	if (size == 4 && !memcmp(buffer, "CISO", 4))
+	if (size != 8) {
+		// Bad or empty file
+		return nullptr;
+	}
+
+	// Check for CISO
+	if (!memcmp(buffer, "CISO", 4)) {
 		return new CISOFileBlockDevice(fileLoader);
-	if (size == 4 && !memcmp(buffer, "\x00PBP", 4)) {
+	} else if (!memcmp(buffer, "\x00PBP", 4)) {
 		uint32_t psarOffset = 0;
 		size = fileLoader->ReadAt(0x24, 1, 4, &psarOffset);
 		if (size == 4 && psarOffset < fileLoader->FileSize())
 			return new NPDRMDemoBlockDevice(fileLoader);
+	} else if (!memcmp(buffer, "MComprHD", 8)) {
+		return new CHDFileBlockDevice(fileLoader);
+	} else {
+		// Should be jsut a regular ISO.
+		return new FileBlockDevice(fileLoader);
 	}
-	return new FileBlockDevice(fileLoader);
 }
 
 u32 BlockDevice::CalculateCRC(volatile bool *cancel) {
@@ -519,3 +531,139 @@ bool NPDRMDemoBlockDevice::ReadBlock(int blockNumber, u8 *outPtr, bool uncached)
 
 	return true;
 }
+
+/*
+ * CHD file
+ */
+static const UINT8 nullsha1[CHD_SHA1_BYTES] = { 0 };
+
+struct CHDImpl {
+	chd_file *chd = nullptr;
+	const chd_header *header = nullptr;
+};
+
+CHDFileBlockDevice::CHDFileBlockDevice(FileLoader *fileLoader)
+	: BlockDevice(fileLoader), impl_(new CHDImpl())
+{
+	// Default, in case of failure
+	numBlocks = 0;
+
+	chd_header childHeader;
+
+	int depth = 0;
+	Path paths[8];
+	paths[0] = fileLoader->GetPath();
+
+	chd_error err = chd_read_header(paths[0].c_str(), &childHeader);
+	if (err != CHDERR_NONE) {
+		ERROR_LOG(LOADER, "Error loading CHD header for '%s': %s", paths[0].c_str(), chd_error_string(err));
+		NotifyReadError();
+		return;
+	}
+
+	/*
+	// TODO: Support parent/child CHD files.
+	if (memcmp(nullsha1, childHeader.parentsha1, sizeof(childHeader.sha1)) != 0) {
+		chd_header parentHeader;
+
+		// Look for parent CHD in current directory
+		Path chdDir = paths[0].NavigateUp();
+
+		std::vector<File::FileInfo> files;
+		if (File::GetFilesInDir(chdDir, &files)) {
+			parentHeader.length = 0;
+
+			for (const auto &file : files) {
+				std::string extension = file.fullName.GetFileExtension();
+				if (extension != ".chd") {
+					continue;
+				}
+
+				if (chd_read_header(filepath.c_str(), &parentHeader) == CHDERR_NONE &&
+					memcmp(parentHeader.sha1, childHeader.parentsha1, sizeof(parentHeader.sha1)) == 0) {
+					// ERROR_LOG(LOADER, "Checking '%s'", filepath.c_str());
+					paths[++depth] = filepath;
+					break;
+				}
+			}
+
+			// Check if parentHeader was opened
+			if (parentHeader.length == 0) {
+				ERROR_LOG(LOADER, "Error loading CHD '%s': parents not found", fileLoader->GetPath().c_str());
+				NotifyReadError();
+				return;
+			}
+			memcpy(childHeader.parentsha1, parentHeader.parentsha1, sizeof(childHeader.parentsha1));
+		} while (memcmp(nullsha1, childHeader.parentsha1, sizeof(childHeader.sha1)) != 0);
+	}
+	*/
+
+	chd_file *parent = NULL;
+	chd_file *child = NULL;
+	err = chd_open(paths[depth].c_str(), CHD_OPEN_READ, NULL, &child);
+	if (err != CHDERR_NONE) {
+		ERROR_LOG(LOADER, "Error loading CHD '%s': %s", paths[depth].c_str(), chd_error_string(err));
+		NotifyReadError();
+		return;
+	}
+	for (int d = depth - 1; d >= 0; d--) {
+		parent = child;
+		child = NULL;
+		err = chd_open(paths[d].c_str(), CHD_OPEN_READ, parent, &child);
+		if (err != CHDERR_NONE) {
+			ERROR_LOG(LOADER, "Error loading CHD '%s': %s", paths[d].c_str(), chd_error_string(err));
+			NotifyReadError();
+			return;
+		}
+	}
+	impl_->chd = child;
+
+	impl_->header = chd_get_header(impl_->chd);
+	readBuffer = new u8[impl_->header->hunkbytes];
+	currentHunk = -1;
+	blocksPerHunk = impl_->header->hunkbytes / impl_->header->unitbytes;
+	numBlocks = impl_->header->unitcount;
+}
+
+CHDFileBlockDevice::~CHDFileBlockDevice()
+{
+	if (numBlocks > 0) {
+		chd_close(impl_->chd);
+		delete[] readBuffer;
+	}
+}
+
+bool CHDFileBlockDevice::ReadBlock(int blockNumber, u8 *outPtr, bool uncached)
+{
+	if ((u32)blockNumber >= numBlocks) {
+		memset(outPtr, 0, GetBlockSize());
+		return false;
+	}
+	u32 hunk = blockNumber / blocksPerHunk;
+	u32 blockInHunk = blockNumber % blocksPerHunk;
+
+	if (currentHunk != hunk) {
+		chd_error err = chd_read(impl_->chd, hunk, readBuffer);
+		if (err != CHDERR_NONE) {
+			ERROR_LOG(LOADER, "CHD read failed: %d %d %s", blockNumber, hunk, chd_error_string(err));
+			NotifyReadError();
+		}
+	}
+	memcpy(outPtr, readBuffer + blockInHunk * impl_->header->unitbytes, GetBlockSize());
+
+	return true;
+}
+
+bool CHDFileBlockDevice::ReadBlocks(u32 minBlock, int count, u8 *outPtr) {
+	if (minBlock >= numBlocks) {
+		memset(outPtr, 0, GetBlockSize() * count);
+		return false;
+	}
+
+	for (int i = 0; i < count; i++) {
+		if (!ReadBlock(minBlock + i, outPtr + i * GetBlockSize())) {
+			return false;
+		}
+	}
+	return true;
+}

Core/FileSystems/BlockDevices.h

@@ -130,5 +130,23 @@ private:
 	u8 *tempBuf;
 };
 
+struct CHDImpl;
+
+class CHDFileBlockDevice : public BlockDevice {
+public:
+	CHDFileBlockDevice(FileLoader *fileLoader);
+	~CHDFileBlockDevice();
+	bool ReadBlock(int blockNumber, u8 *outPtr, bool uncached = false) override;
+	bool ReadBlocks(u32 minBlock, int count, u8 *outPtr) override;
+	u32 GetNumBlocks() override { return numBlocks; }
+	bool IsDisc() override { return true; }
+
+private:
+	std::unique_ptr<CHDImpl> impl_;
+	u8 *readBuffer;
+	u32 currentHunk;
+	u32 blocksPerHunk;
+	u32 numBlocks;
+};
 
 BlockDevice *constructBlockDevice(FileLoader *fileLoader);

Core/Loaders.cpp

@@ -94,6 +94,8 @@ IdentifiedFileType Identify_File(FileLoader *fileLoader, std::string *errorStrin
 		return IdentifiedFileType::PSP_ISO;
 	} else if (extension == ".cso") {
 		return IdentifiedFileType::PSP_ISO;
+	} else if (extension == ".chd") {
+		return IdentifiedFileType::PSP_ISO;
 	} else if (extension == ".ppst") {
 		return IdentifiedFileType::PPSSPP_SAVESTATE;
 	} else if (extension == ".ppdmp") {

Qt/QtMain.cpp

@@ -304,7 +304,7 @@ bool MainUI::HandleCustomEvent(QEvent *e) {
 		const char *filter = "All files (*.*)";
 		switch (fileType) {
 		case BrowseFileType::BOOTABLE:
-			filter = "PSP ROMs (*.iso *.cso *.pbp *.elf *.zip *.ppdmp)";
+			filter = "PSP ROMs (*.iso *.cso *.chd *.pbp *.elf *.zip *.ppdmp)";
 			break;
 		case BrowseFileType::IMAGE:
 			filter = "Pictures (*.jpg *.png)";

Qt/mainwindow.cpp

@@ -125,7 +125,7 @@ void MainWindow::bootDone()
 /* SIGNALS */
 void MainWindow::loadAct()
 {
-	QString filename = QFileDialog::getOpenFileName(NULL, "Load File", g_Config.currentDirectory.c_str(), "PSP ROMs (*.pbp *.elf *.iso *.cso *.prx)");
+	QString filename = QFileDialog::getOpenFileName(NULL, "Load File", g_Config.currentDirectory.c_str(), "PSP ROMs (*.pbp *.elf *.iso *.cso *.chd *.prx)");
 	if (QFile::exists(filename))
 	{
 		QFileInfo info(filename);
@@ -255,7 +255,7 @@ void MainWindow::resetAct()
 
 void MainWindow::switchUMDAct()
 {
-	QString filename = QFileDialog::getOpenFileName(NULL, "Switch UMD", g_Config.currentDirectory.c_str(), "PSP ROMs (*.pbp *.elf *.iso *.cso *.prx)");
+	QString filename = QFileDialog::getOpenFileName(NULL, "Switch UMD", g_Config.currentDirectory.c_str(), "PSP ROMs (*.pbp *.elf *.iso *.cso *.chd *.prx)");
 	if (QFile::exists(filename))
 	{
 		QFileInfo info(filename);

Windows/PPSSPP.sln

@@ -93,6 +93,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "cpu_features", "..\ext\cpu_
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "rcheevos", "..\ext\rcheevos-build\rcheevos.vcxproj", "{31694510-A8C0-40F6-B09B-E8DF825ADEFA}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libchdr", "..\ext\libchdr.vcxproj", "{956F1F48-B612-46D8-89EE-96996DCD9383}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|ARM = Debug|ARM
@@ -395,6 +397,22 @@ Global
 		{31694510-A8C0-40F6-B09B-E8DF825ADEFA}.Release|Win32.Build.0 = Release|Win32
 		{31694510-A8C0-40F6-B09B-E8DF825ADEFA}.Release|x64.ActiveCfg = Release|x64
 		{31694510-A8C0-40F6-B09B-E8DF825ADEFA}.Release|x64.Build.0 = Release|x64
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Debug|ARM.ActiveCfg = Debug|ARM
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Debug|ARM.Build.0 = Debug|ARM
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Debug|ARM64.ActiveCfg = Debug|ARM64
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Debug|ARM64.Build.0 = Debug|ARM64
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Debug|Win32.ActiveCfg = Debug|Win32
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Debug|Win32.Build.0 = Debug|Win32
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Debug|x64.ActiveCfg = Debug|x64
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Debug|x64.Build.0 = Debug|x64
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Release|ARM.ActiveCfg = Release|ARM
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Release|ARM.Build.0 = Release|ARM
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Release|ARM64.ActiveCfg = Release|ARM64
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Release|ARM64.Build.0 = Release|ARM64
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Release|Win32.ActiveCfg = Release|Win32
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Release|Win32.Build.0 = Release|Win32
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Release|x64.ActiveCfg = Release|x64
+		{956F1F48-B612-46D8-89EE-96996DCD9383}.Release|x64.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -412,6 +430,7 @@ Global
 		{8BFD8150-94D5-4BF9-8A50-7BD9929A0850} = {39FCACF8-10D9-4D8D-97AA-7507436AD932}
 		{C249F016-7F82-45CF-BB6E-0642A988C4D3} = {39FCACF8-10D9-4D8D-97AA-7507436AD932}
 		{31694510-A8C0-40F6-B09B-E8DF825ADEFA} = {39FCACF8-10D9-4D8D-97AA-7507436AD932}
+		{956F1F48-B612-46D8-89EE-96996DCD9383} = {39FCACF8-10D9-4D8D-97AA-7507436AD932}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {2FD47774-A031-48F4-B645-A49A3140A29B}

Windows/PPSSPP.vcxproj

@@ -1721,6 +1721,9 @@
     <ProjectReference Include="..\ext\glslang.vcxproj">
       <Project>{edfa2e87-8ac1-4853-95d4-d7594ff81947}</Project>
     </ProjectReference>
+    <ProjectReference Include="..\ext\libchdr.vcxproj">
+      <Project>{956f1f48-b612-46d8-89ee-96996dcd9383}</Project>
+    </ProjectReference>
     <ProjectReference Include="..\ext\libkirk\libkirk.vcxproj">
       <Project>{3baae095-e0ab-4b0e-b5df-ce39c8ae31de}</Project>
     </ProjectReference>

Windows/main.cpp

@@ -554,7 +554,7 @@ bool System_MakeRequest(SystemRequestType type, int requestId, const std::string
 		std::wstring filter;
 		switch (type) {
 		case BrowseFileType::BOOTABLE:
-			filter = MakeFilter(L"All supported file types (*.iso *.cso *.pbp *.elf *.prx *.zip *.ppdmp)|*.pbp;*.elf;*.iso;*.cso;*.prx;*.zip;*.ppdmp|PSP ROMs (*.iso *.cso *.pbp *.elf *.prx)|*.pbp;*.elf;*.iso;*.cso;*.prx|Homebrew/Demos installers (*.zip)|*.zip|All files (*.*)|*.*||");
+			filter = MakeFilter(L"All supported file types (*.iso *.cso *.chd *.pbp *.elf *.prx *.zip *.ppdmp)|*.pbp;*.elf;*.iso;*.cso;*.chd;*.prx;*.zip;*.ppdmp|PSP ROMs (*.iso *.cso *.chd *.pbp *.elf *.prx)|*.pbp;*.elf;*.iso;*.cso;*.chd;*.prx|Homebrew/Demos installers (*.zip)|*.zip|All files (*.*)|*.*||");
 			break;
 		case BrowseFileType::INI:
 			filter = MakeFilter(L"Ini files (*.ini)|*.ini|All files (*.*)|*.*||");

ext/libchdr

@@ -0,0 +1 @@
+Subproject commit 9108f34a892272f61c3ed3bff4bee728d4c1dd57

ext/libchdr.vcxproj

@@ -0,0 +1,374 @@
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+    <ClCompile Include="libchdr\deps\lzma-22.01\src\Bra.c" />
+    <ClCompile Include="libchdr\deps\lzma-22.01\src\Bra86.c" />
+    <ClCompile Include="libchdr\deps\lzma-22.01\src\BraIA64.c" />
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ext/libchdr.vcxproj.filters

@@ -0,0 +1,72 @@
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+      <Filter>LZMA</Filter>
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+    <ClInclude Include="libchdr\include\libchdr\bitstream.h" />
+    <ClInclude Include="libchdr\include\libchdr\cdrom.h" />
+    <ClInclude Include="libchdr\include\libchdr\chd.h" />
+    <ClInclude Include="libchdr\include\libchdr\chdconfig.h" />
+    <ClInclude Include="libchdr\include\libchdr\flac.h" />
+    <ClInclude Include="libchdr\include\libchdr\huffman.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <Filter Include="LZMA">
+      <UniqueIdentifier>{ff31581b-3ff9-4e39-bb96-2f662896cf70}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+</Project>

headless/Headless.vcxproj

@@ -502,6 +502,9 @@
     <ProjectReference Include="..\ext\glslang.vcxproj">
       <Project>{edfa2e87-8ac1-4853-95d4-d7594ff81947}</Project>
     </ProjectReference>
+    <ProjectReference Include="..\ext\libchdr.vcxproj">
+      <Project>{956f1f48-b612-46d8-89ee-96996dcd9383}</Project>
+    </ProjectReference>
     <ProjectReference Include="..\ext\libkirk\libkirk.vcxproj">
       <Project>{3baae095-e0ab-4b0e-b5df-ce39c8ae31de}</Project>
     </ProjectReference>

unittest/UnitTests.vcxproj

@@ -420,6 +420,9 @@
     <ProjectReference Include="..\ext\glslang.vcxproj">
       <Project>{edfa2e87-8ac1-4853-95d4-d7594ff81947}</Project>
     </ProjectReference>
+    <ProjectReference Include="..\ext\libchdr.vcxproj">
+      <Project>{956f1f48-b612-46d8-89ee-96996dcd9383}</Project>
+    </ProjectReference>
     <ProjectReference Include="..\ext\libkirk\libkirk.vcxproj">
       <Project>{3baae095-e0ab-4b0e-b5df-ce39c8ae31de}</Project>
     </ProjectReference>