Create async-source-duplication filter and source

.clang-format

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+# please use clang-format version 8 or later
+
+Standard: Cpp11
+AccessModifierOffset: -8
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: Left
+AlignOperands: true
+AlignTrailingComments: true
+#AllowAllArgumentsOnNextLine: false  # requires clang-format 9
+#AllowAllConstructorInitializersOnNextLine: false  # requires clang-format 9
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: Inline
+AllowShortIfStatementsOnASingleLine: false
+#AllowShortLambdasOnASingleLine: Inline  # requires clang-format 9
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: false
+BinPackArguments: true
+BinPackParameters: true
+BraceWrapping:
+  AfterClass: false
+  AfterControlStatement: false
+  AfterEnum: false
+  AfterFunction: true
+  AfterNamespace: false
+  AfterObjCDeclaration: false
+  AfterStruct: true
+  AfterUnion: false
+  AfterExternBlock: false
+  BeforeCatch: false
+  BeforeElse: true
+  IndentBraces: false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Custom
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeColon
+BreakStringLiterals: false  # apparently unpredictable
+ColumnLimit: 120
+CompactNamespaces: false
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
+ConstructorInitializerIndentWidth: 8
+ContinuationIndentWidth: 8
+Cpp11BracedListStyle: true
+DerivePointerAlignment: false
+DisableFormat: false
+FixNamespaceComments: false
+ForEachMacros: 
+  - 'json_object_foreach'
+  - 'json_object_foreach_safe'
+  - 'json_array_foreach'
+IncludeBlocks: Preserve
+IndentCaseLabels: false
+IndentPPDirectives: None
+IndentWidth: 8
+IndentWrappedFunctionNames: false
+KeepEmptyLinesAtTheStartOfBlocks: true
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+#ObjCBinPackProtocolList: Auto  # requires clang-format 7
+ObjCBlockIndentWidth: 8
+ObjCSpaceAfterProperty: true
+ObjCSpaceBeforeProtocolList: true
+
+PenaltyBreakAssignment: 10
+PenaltyBreakBeforeFirstCallParameter: 30
+PenaltyBreakComment: 10
+PenaltyBreakFirstLessLess: 0
+PenaltyBreakString: 10
+PenaltyExcessCharacter: 100
+PenaltyReturnTypeOnItsOwnLine: 60
+
+PointerAlignment: Right
+ReflowComments: false
+SortIncludes: false
+SortUsingDeclarations: false
+SpaceAfterCStyleCast: false
+#SpaceAfterLogicalNot: false  # requires clang-format 9
+SpaceAfterTemplateKeyword: false
+SpaceBeforeAssignmentOperators: true
+#SpaceBeforeCtorInitializerColon: true  # requires clang-format 7
+#SpaceBeforeInheritanceColon: true  # requires clang-format 7
+SpaceBeforeParens: ControlStatements
+#SpaceBeforeRangeBasedForLoopColon: true  # requires clang-format 7
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles: false
+SpacesInCStyleCastParentheses: false
+SpacesInContainerLiterals: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+#StatementMacros:  # requires clang-format 8
+#  - 'Q_OBJECT'
+TabWidth: 8
+#TypenameMacros:  # requires clang-format 9
+#  - 'DARRAY'
+UseTab: ForContinuationAndIndentation
+---
+Language: ObjC

.github/workflows/clang-format.yml

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+name: Clang Format Check
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  clang:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Clang
+      run: |
+        sudo apt-get install -y clang-format-12
+        clang-format -i -fallback-style=none $(git ls-files | grep '\.\(c\|h\)$')
+
+    - name: Check
+      # Build your program with the given configuration
+      run: |
+        dirty=$(git ls-files --modified)
+        set +x
+        if [[ $dirty ]]; then
+          git diff
+          echo "Error: File(s) are not properly formatted."
+          echo "$dirty"
+          exit 1
+        fi

.gitignore

@@ -0,0 +1,13 @@
+*~
+.DS_Store
+/build/
+/build32/
+/build64/
+/release/
+/installer/Output/
+
+.vscode
+.idea
+
+# ignore generated files
+*.generated.*

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.10)
+
+# Change obs-plugintemplate to your plugin's name in a machine-readable format
+# (e.g.: obs-myawesomeplugin) and set 
+project(obs-async-source-duplication)
+set(CMAKE_PROJECT_VERSION 0.1.0) # TODO: update cmake to 3.12 or later and put to 'project'
+
+# Replace `Your Name Here` with the name (yours or your organization's) you want
+# to see as the author of the plugin (in the plugin's metadata itself and in the installers)
+set(PLUGIN_AUTHOR "Norihiro Kamae")
+
+# Replace `com.example.obs-plugin-template` with a unique Bundle ID for macOS releases
+# (used both in the installer and when submitting the installer for notarization)
+set(MACOS_BUNDLEID "net.nagater.obs-async-source-duplication")
+set(ID_PREFIX "net.nagater.obs.")
+
+# Replace `me@contoso.com` with the maintainer email address you want to put in Linux packages
+set(LINUX_MAINTAINER_EMAIL "norihiro@nagater.net")
+
+# TAKE NOTE: No need to edit things past this point
+
+set(CMAKE_PREFIX_PATH "${QTDIR}")
+set(CMAKE_AUTOMOC OFF)
+set(CMAKE_AUTOUIC OFF)
+
+# In case you need C++
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+if (WIN32 OR APPLE)
+include(external/FindLibObs.cmake)
+endif()
+
+find_package(LibObs REQUIRED)
+
+configure_file(
+	src/plugin-macros.h.in
+	../src/plugin-macros.generated.h
+)
+configure_file(
+	installer/installer-Windows.iss.in
+	../installer/installer-Windows.generated.iss
+)
+
+configure_file(
+	ci/ci_includes.sh.in
+	../ci/ci_includes.generated.sh
+)
+configure_file(
+	ci/ci_includes.cmd.in
+	../ci/ci_includes.generated.cmd
+)
+
+set(PLUGIN_SOURCES
+	src/plugin-main.c
+	src/async-source-duplication-filter.c
+	src/async-source-duplication-source.c
+)
+
+set(PLUGIN_HEADERS
+	src/plugin-macros.generated.h
+)
+
+if(MSVC)
+	set(PLUGIN_PLATFORM_DEPS
+		${W32_PTHREADS_LIB})
+endif()
+
+
+# --- Platform-independent build settings ---
+add_library(${CMAKE_PROJECT_NAME} MODULE ${PLUGIN_SOURCES} ${PLUGIN_HEADERS})
+
+include_directories(
+	${LIBOBS_INCLUDE_DIR}
+)
+
+target_link_libraries(${CMAKE_PROJECT_NAME}
+	libobs
+	${PLUGIN_PLATFORM_DEPS}
+)
+
+# --- End of section ---
+
+# --- Windows-specific build settings and tasks ---
+if(WIN32)
+	# Enable Multicore Builds and disable FH4 (to not depend on VCRUNTIME140_1.DLL when building with VS2019)
+	if (MSVC)
+		add_definitions(/MP /d2FH4-)
+		add_definitions("-D_USE_MATH_DEFINES")
+	endif()
+
+	if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+		set(ARCH_NAME "64bit")
+		set(OBS_BUILDDIR_ARCH "build64")
+	else()
+		set(ARCH_NAME "32bit")
+		set(OBS_BUILDDIR_ARCH "build32")
+	endif()
+
+	include_directories(
+		"${LIBOBS_INCLUDE_DIR}/../${OBS_BUILDDIR_ARCH}/UI"
+	)
+
+	target_link_libraries(${CMAKE_PROJECT_NAME}
+		"${OBS_FRONTEND_LIB}"
+	)
+
+	# --- Release package helper ---
+	# The "release" folder has a structure similar OBS' one on Windows
+	set(RELEASE_DIR "${PROJECT_SOURCE_DIR}/release")
+
+	add_custom_command(TARGET ${CMAKE_PROJECT_NAME} POST_BUILD
+		# If config is Release or RelWithDebInfo, package release files
+		COMMAND if $<OR:$<CONFIG:Release>,$<CONFIG:RelWithDebInfo>>==1 (
+			"${CMAKE_COMMAND}" -E make_directory
+			"${RELEASE_DIR}/data/obs-plugins/${CMAKE_PROJECT_NAME}"
+			"${RELEASE_DIR}/obs-plugins/${ARCH_NAME}"
+		)
+
+		COMMAND if $<OR:$<CONFIG:Release>,$<CONFIG:RelWithDebInfo>>==1 (
+			"${CMAKE_COMMAND}" -E copy_directory
+			"${PROJECT_SOURCE_DIR}/data"
+			"${RELEASE_DIR}/data/obs-plugins/${CMAKE_PROJECT_NAME}"
+		)
+
+		COMMAND if $<OR:$<CONFIG:Release>,$<CONFIG:RelWithDebInfo>>==1 (
+			"${CMAKE_COMMAND}" -E copy
+			"$<TARGET_FILE:${CMAKE_PROJECT_NAME}>"
+			"${RELEASE_DIR}/obs-plugins/${ARCH_NAME}"
+		)
+
+		# If config is RelWithDebInfo, copy the pdb file
+		COMMAND if $<CONFIG:RelWithDebInfo>==1 (
+			"${CMAKE_COMMAND}" -E copy
+			"$<TARGET_PDB_FILE:${CMAKE_PROJECT_NAME}>"
+			"${RELEASE_DIR}/obs-plugins/${ARCH_NAME}"
+		)
+
+		# Copy to obs-studio dev environment for immediate testing
+		COMMAND if $<CONFIG:Debug>==1 (
+			"${CMAKE_COMMAND}" -E copy
+			"$<TARGET_FILE:${CMAKE_PROJECT_NAME}>"
+			"${LIBOBS_INCLUDE_DIR}/../${OBS_BUILDDIR_ARCH}/rundir/$<CONFIG>/obs-plugins/${ARCH_NAME}"
+		)
+
+		COMMAND if $<CONFIG:Debug>==1 (
+			"${CMAKE_COMMAND}" -E copy
+			"$<TARGET_PDB_FILE:${CMAKE_PROJECT_NAME}>"
+			"${LIBOBS_INCLUDE_DIR}/../${OBS_BUILDDIR_ARCH}/rundir/$<CONFIG>/obs-plugins/${ARCH_NAME}"
+		)
+
+		COMMAND if $<CONFIG:Debug>==1 (
+			"${CMAKE_COMMAND}" -E make_directory
+			"${LIBOBS_INCLUDE_DIR}/../${OBS_BUILDDIR_ARCH}/rundir/$<CONFIG>/data/obs-plugins/${CMAKE_PROJECT_NAME}"
+		)
+
+		COMMAND if $<CONFIG:Debug>==1 (
+			"${CMAKE_COMMAND}" -E copy_directory
+			"${PROJECT_SOURCE_DIR}/data"
+			"${LIBOBS_INCLUDE_DIR}/../${OBS_BUILDDIR_ARCH}/rundir/$<CONFIG>/data/obs-plugins/${CMAKE_PROJECT_NAME}"
+		)
+	)
+	# --- End of sub-section ---
+
+endif()
+# --- End of section ---
+
+# --- Linux-specific build settings and tasks ---
+if(UNIX AND NOT APPLE)
+	include(GNUInstallDirs)
+
+	set_target_properties(${CMAKE_PROJECT_NAME} PROPERTIES PREFIX "")
+
+	install(TARGETS ${CMAKE_PROJECT_NAME}
+		LIBRARY DESTINATION "${CMAKE_INSTALL_FULL_LIBDIR}/obs-plugins")
+
+	install(DIRECTORY data/
+		DESTINATION "${CMAKE_INSTALL_FULL_DATAROOTDIR}/obs/obs-plugins/${CMAKE_PROJECT_NAME}")
+endif()
+# --- End of section ---
+
+# -- OS X specific build settings and tasks --
+if(APPLE)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++ -fvisibility=default")
+
+	set_target_properties(${CMAKE_PROJECT_NAME} PROPERTIES PREFIX "")
+	target_link_libraries(${CMAKE_PROJECT_NAME} "${OBS_FRONTEND_LIB}")
+endif()
+# -- End of section --