Add NAV sources.

src/libraries/nav/.github/workflows/build.yml

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+name: Build
+on: [push, pull_request]
+
+jobs:
+  Windows:
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        PLATFORM: [x64, ARM64]
+    defaults:
+      run:
+        shell: cmd
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+    - name: Get FFmpeg
+      uses: robinraju/release-downloader@v1
+      with:
+        repository: GyanD/codexffmpeg
+        tag: "6.0"
+        fileName: ffmpeg-6.0-full_build-shared.7z
+        tarBall: false
+        zipBall: false
+    # A note to myself and other: FFmpeg build is for x64, but it doesn't matter. Only the include files are
+    # necessary for NAV to work as it will use runtime loading.
+    - name: Extract FFmpeg
+      run: 7z x ffmpeg-6.0-full_build-shared.7z
+    - name: Configure
+      run: cmake -Bbuild -S. -A ${{ matrix.PLATFORM }} --install-prefix %CD%\install -DBUILD_SHARED_LIBS=1 -DFFMPEG_DIR=%CD%\ffmpeg-6.0-full_build-shared
+    - name: Install
+      run: cmake --build build --config RelWithDebInfo --target install -j%NUMBER_OF_PROCESSORS%
+    - name: Artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: nav-dll-${{ matrix.PLATFORM }}
+        path: install/
+        compression-level: 9
+  Ubuntu:
+    runs-on: ubuntu-24.04
+    steps:
+    - name: Install FFmpeg Development Libraries
+      run: sudo apt-get install libavcodec-dev libavformat-dev libavutil-dev libswresample-dev libswscale-dev
+    - name: Checkout
+      uses: actions/checkout@v4
+    - name: Configure
+      run: cmake -Bbuild -S. -DCMAKE_BUILD_TYPE=RelWithDebInfo --install-prefix $PWD/install -DBUILD_SHARED_LIBS=1
+    - name: Install
+      run: cmake --build build --target install -j$(nproc)
+    - name: Artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: nav-so-x86_64
+        path: install/
+        compression-level: 9

src/libraries/nav/.github/workflows/doxygen.yml

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+name: Doxygen
+on:
+  push:
+    branches: [main]
+  release:
+    types: [released]
+
+concurrency:
+  group: "docs"
+  cancel-in-progress: false
+
+jobs:
+  Documentation:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout Main Repository
+      uses: actions/checkout@v4
+      with:
+        path: nav
+        fetch-depth: 2
+    - name: Checkout gh-pages
+      uses: actions/checkout@v4
+      with:
+        path: docs
+        ref: gh-pages
+    - name: Generate Documentation
+      uses: mattnotmitt/[email protected]
+      with:
+        working-directory: nav
+    - name: Cleanup Branch
+      if: github.event_name == 'push'
+      run:
+        rm -rf docs/${{ github.ref_name }}
+    - name: Move Generated Docs
+      run: sudo mv nav/docs/html docs/${{ github.ref_name }}
+    - name: Add and Commit
+      uses: EndBug/add-and-commit@v9
+      with:
+        cwd: docs
+        add: ${{ github.ref_name }}
+        default_author: github_actions
+        message: 'Build ${{ github.sha }} of ${{ github.ref_name }}'
+        push: true

src/libraries/nav/.gitignore

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+/.vscode
+build
+docs
+install

src/libraries/nav/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.21)
+project(nav LANGUAGES C CXX)
+
+if(POLICY CMP0077)
+	cmake_policy(SET CMP0077 NEW)
+endif()
+
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+
+# Read version
+file(READ include/nav/nav.h NAV_INCLUDE_H LIMIT 1024)
+string(REGEX MATCH "#define NAV_VERSION_MAJOR ([0-9+])" _ "${NAV_INCLUDE_H}")
+set(NAV_VERSION_MAJOR ${CMAKE_MATCH_1})
+string(REGEX MATCH "#define NAV_VERSION_MINOR ([0-9+])" _ "${NAV_INCLUDE_H}")
+set(NAV_VERSION_MINOR ${CMAKE_MATCH_1})
+string(REGEX MATCH "#define NAV_VERSION_PATCH ([0-9+])" _ "${NAV_INCLUDE_H}")
+set(NAV_VERSION_PATCH ${CMAKE_MATCH_1})
+
+# Public include files
+set(NAV_PUBLIC_INCLUDE
+	include/nav/audioformat.h
+	include/nav/input.h
+	include/nav/nav.h
+	include/nav/types.h
+)
+
+# Shared/static library
+if(NOT DEFINED NAV_SHARED)
+	if(BUILD_SHARED_LIBS)
+		set(NAV_SHARED_DEFAULT 1)
+	else()
+		set(NAV_SHARED_DEFAULT 0)
+	endif()
+endif()
+option(NAV_SHARED "NAV: Build as shared library" ${NAV_SHARED_DEFAULT})
+
+if(NAV_SHARED)
+	set(NAV_SHARED_VALUE SHARED)
+else()
+	set(NAV_SHARED_VALUE STATIC)
+endif()
+
+add_library(nav ${NAV_SHARED_VALUE}
+	${NAV_PUBLIC_INCLUDE}
+	src/nav.cpp
+	src/nav_backend.cpp
+	src/nav_backend.hpp
+	src/nav_backend_androidndk.cpp
+	src/nav_backend_androidndk.hpp
+	src/nav_backend_androidndk_funcptr.h
+	src/nav_backend_androidndk_internal.hpp
+	src/nav_backend_ffmpeg.cpp
+	src/nav_backend_ffmpeg.hpp
+	src/nav_backend_ffmpeg_funcptr.h
+	src/nav_backend_ffmpeg_internal.hpp
+	src/nav_backend_mediafoundation.cpp
+	src/nav_backend_mediafoundation.hpp
+	src/nav_backend_mediafoundation_internal.hpp
+	src/nav_common.cpp
+	src/nav_common.hpp
+	src/nav_config.hpp
+	src/nav_dynlib.cpp
+	src/nav_dynlib.hpp
+	src/nav_error.cpp
+	src/nav_error.hpp
+	src/nav_input_file.cpp
+	src/nav_input_file.hpp
+	src/nav_input_memory.cpp
+	src/nav_input_memory.hpp
+	src/nav_internal.hpp
+	src/nav_internal.cpp
+)
+target_include_directories(nav PUBLIC include)
+target_compile_features(nav PUBLIC c_std_99)
+target_compile_features(nav PRIVATE cxx_std_17)
+
+if(NAV_SHARED)
+	target_compile_definitions(nav PUBLIC NAV_SHARED)
+
+	if(NOT ANDROID)
+		set_target_properties(nav PROPERTIES
+			VERSION ${NAV_VERSION_MAJOR}.${NAV_VERSION_MINOR}.${NAV_VERSION_PATCH}
+			SOVERSION ${NAV_VERSION_MAJOR}
+		)
+	endif()
+endif()
+
+# Find FFmpeg
+if(FFMPEG_DIR)
+	# Ok I trusted you
+	set(FFMPEG_INCLUDE_DIRS ${FFMPEG_DIR}/include)
+else()
+	find_package(FFmpeg COMPONENTS AVCODEC AVFORMAT AVUTIL SWRESAMPLE SWSCALE)
+endif()
+
+if(FFMPEG_FOUND OR FFMPEG_INCLUDE_DIRS)
+	message(STATUS "Using FFmpeg include directory: ${FFMPEG_INCLUDE_DIRS}")
+	target_include_directories(nav PRIVATE ${FFMPEG_INCLUDE_DIRS})
+endif()
+
+# Install files
+if(PROJECT_IS_TOP_LEVEL)
+	include(GNUInstallDirs)
+	install(TARGETS nav)
+	install(FILES ${NAV_PUBLIC_INCLUDE} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/nav)
+	if(WIN32 AND NAV_SHARED)
+		install(FILES $<TARGET_PDB_FILE:nav> DESTINATION ${CMAKE_INSTALL_BINDIR} OPTIONAL)
+	endif()
+endif()