Revert "[audio] Replace libopus with FFmpeg (#4169)" (#4419)

This reverts commit ff8368c6066faf3962e2f77af7da4954e2ff6a43.

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4419
Reviewed-by: Maufeat <sahyno1996@gmail.com>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

2 files changed, 181 insertions, 0 deletions

diff --git a/.patch/opus/0001-disable-clang-runtime-neon.patch b/.patch/opus/0001-disable-clang-runtime-neon.patch
new file mode 100644
index 0000000000..27a905c366
--- /dev/null
+++ b/.patch/opus/0001-disable-clang-runtime-neon.patch
@@ -0,0 +1,28 @@
+From cc15da16e533b2a801934eab2dfeaf3c3949a1dc Mon Sep 17 00:00:00 2001
+From: crueter <crueter@eden-emu.dev>
+Date: Mon, 8 Sep 2025 12:28:55 -0400
+Subject: [PATCH] [cmake] disable NEON runtime check on clang-cl
+
+When enabling runtime NEON checking for clang-cl, the linker would error out with `undefined symbol: __emit`, since clang doesn't actually implement this instruction. Therefore it makes sense to disable the runtime check by default on this platform, until either this is fixed or a clang-cl compatible intrinsic check is added (I don't have enough knowledge of MSVC to do this)
+---
+ cmake/OpusConfig.cmake | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/cmake/OpusConfig.cmake b/cmake/OpusConfig.cmake
+index e9319fbad..d0f459e88 100644
+--- a/cmake/OpusConfig.cmake
++++ b/cmake/OpusConfig.cmake
+@@ -71,7 +71,12 @@ elseif(OPUS_CPU_ARM AND NOT OPUS_DISABLE_INTRINSICS)
+   opus_detect_neon(COMPILER_SUPPORT_NEON)
+   if(COMPILER_SUPPORT_NEON)
+     option(OPUS_USE_NEON "Option to enable NEON" ON)
+-    option(OPUS_MAY_HAVE_NEON "Does runtime check for neon support" ON)
++    if (MSVC AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
++      set(NEON_RUNTIME_CHECK_DEFAULT OFF)
++    else()
++      set(NEON_RUNTIME_CHECK_DEFAULT ON)
++    endif()
++    option(OPUS_MAY_HAVE_NEON "Does runtime check for neon support" ${NEON_RUNTIME_CHECK_DEFAULT})
+     option(OPUS_PRESUME_NEON "Assume target CPU has NEON support" OFF)
+     if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64")
+       set(OPUS_PRESUME_NEON ON)
diff --git a/.patch/opus/0002-no-install.patch b/.patch/opus/0002-no-install.patch
new file mode 100644
index 0000000000..833a3e4178
--- /dev/null
+++ b/.patch/opus/0002-no-install.patch
@@ -0,0 +1,153 @@
+From bf455b67b4eaa446ffae5d25410b141b7b1b1082 Mon Sep 17 00:00:00 2001
+From: crueter <crueter@eden-emu.dev>
+Date: Mon, 8 Sep 2025 12:08:20 -0400
+Subject: [PATCH] [cmake] `OPUS_INSTALL` option; only default install if root
+ project
+
+Signed-off-by: crueter <crueter@eden-emu.dev>
+---
+ CMakeLists.txt | 112 ++++++++++++++++++++++++++++---------------------
+ 1 file changed, 64 insertions(+), 48 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index fcf034b19..08b5e16f8 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -4,6 +4,13 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+ include(OpusPackageVersion)
+ get_package_version(PACKAGE_VERSION PROJECT_VERSION)
+ 
++# root project detection
++if(DEFINED PROJECT_NAME)
++  set(root_project OFF)
++else()
++  set(root_project ON)
++endif()
++
+ project(Opus LANGUAGES C VERSION ${PROJECT_VERSION})
+ 
+ include(OpusFunctions)
+@@ -83,12 +90,16 @@ set(OPUS_DNN_FLOAT_DEBUG_HELP_STR "Run DNN computations as float for debugging p
+ option(OPUS_DNN_FLOAT_DEBUG ${OPUS_DNN_FLOAT_DEBUG_HELP_STR} OFF)
+ add_feature_info(OPUS_DNN_FLOAT_DEBUG OPUS_DNN_FLOAT_DEBUG ${OPUS_DNN_FLOAT_DEBUG_HELP_STR})
+ 
++set(OPUS_INSTALL_HELP_STR "Install Opus targets")
++option(OPUS_INSTALL ${OPUS_INSTALL_HELP_STR} ${root_project})
++add_feature_info(OPUS_INSTALL OPUS_INSTALL ${OPUS_INSTALL_HELP_STR})
++
+ set(OPUS_INSTALL_PKG_CONFIG_MODULE_HELP_STR "install pkg-config module.")
+-option(OPUS_INSTALL_PKG_CONFIG_MODULE ${OPUS_INSTALL_PKG_CONFIG_MODULE_HELP_STR} ON)
++option(OPUS_INSTALL_PKG_CONFIG_MODULE ${OPUS_INSTALL_PKG_CONFIG_MODULE_HELP_STR} ${OPUS_INSTALL})
+ add_feature_info(OPUS_INSTALL_PKG_CONFIG_MODULE OPUS_INSTALL_PKG_CONFIG_MODULE ${OPUS_INSTALL_PKG_CONFIG_MODULE_HELP_STR})
+ 
+ set(OPUS_INSTALL_CMAKE_CONFIG_MODULE_HELP_STR "install CMake package config module.")
+-option(OPUS_INSTALL_CMAKE_CONFIG_MODULE ${OPUS_INSTALL_CMAKE_CONFIG_MODULE_HELP_STR} ON)
++option(OPUS_INSTALL_CMAKE_CONFIG_MODULE ${OPUS_INSTALL_CMAKE_CONFIG_MODULE_HELP_STR} ${OPUS_INSTALL})
+ add_feature_info(OPUS_INSTALL_CMAKE_CONFIG_MODULE OPUS_INSTALL_CMAKE_CONFIG_MODULE ${OPUS_INSTALL_CMAKE_CONFIG_MODULE_HELP_STR})
+ 
+ set(OPUS_DRED_HELP_STR "enable DRED.")
+@@ -613,53 +624,58 @@ if(OPUS_BUILD_FRAMEWORK)
+                         OUTPUT_NAME Opus)
+ endif()
+ 
+-install(TARGETS opus
+-        EXPORT OpusTargets
+-        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+-        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+-        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+-        FRAMEWORK DESTINATION ${CMAKE_INSTALL_PREFIX}
+-        PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/opus)
+-
+-if(OPUS_INSTALL_PKG_CONFIG_MODULE)
+-  set(prefix ${CMAKE_INSTALL_PREFIX})
+-  set(exec_prefix ${CMAKE_INSTALL_PREFIX})
+-  set(libdir ${CMAKE_INSTALL_FULL_LIBDIR})
+-  set(includedir ${CMAKE_INSTALL_FULL_INCLUDEDIR})
+-  set(VERSION ${PACKAGE_VERSION})
+-  if(HAVE_LIBM)
+-    set(LIBM "-lm")
++if (OPUS_INSTALL)
++  install(TARGETS opus
++          EXPORT OpusTargets
++          ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
++          LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
++          RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
++          FRAMEWORK DESTINATION ${CMAKE_INSTALL_PREFIX}
++          PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/opus)
++
++  if(OPUS_INSTALL_PKG_CONFIG_MODULE)
++    set(prefix ${CMAKE_INSTALL_PREFIX})
++    set(exec_prefix ${CMAKE_INSTALL_PREFIX})
++    set(libdir ${CMAKE_INSTALL_FULL_LIBDIR})
++    set(includedir ${CMAKE_INSTALL_FULL_INCLUDEDIR})
++    set(VERSION ${PACKAGE_VERSION})
++    if(HAVE_LIBM)
++      set(LIBM "-lm")
++    endif()
++    configure_file(opus.pc.in opus.pc)
++    install(FILES ${CMAKE_CURRENT_BINARY_DIR}/opus.pc
++            DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
++  endif()
++
++  if(OPUS_INSTALL_CMAKE_CONFIG_MODULE)
++    set(CPACK_GENERATOR TGZ)
++    include(CPack)
++    set(CMAKE_INSTALL_PACKAGEDIR ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME})
++    install(EXPORT OpusTargets
++            NAMESPACE Opus::
++            DESTINATION ${CMAKE_INSTALL_PACKAGEDIR})
++
++    include(CMakePackageConfigHelpers)
++
++    set(INCLUDE_INSTALL_DIR ${CMAKE_INSTALL_INCLUDEDIR})
++    configure_package_config_file(
++      ${PROJECT_SOURCE_DIR}/cmake/OpusConfig.cmake.in
++      OpusConfig.cmake
++      INSTALL_DESTINATION
++      ${CMAKE_INSTALL_PACKAGEDIR}
++      PATH_VARS
++      INCLUDE_INSTALL_DIR
++      INSTALL_PREFIX
++      ${CMAKE_INSTALL_PREFIX})
++
++    write_basic_package_version_file(OpusConfigVersion.cmake
++                                    VERSION ${PROJECT_VERSION}
++                                    COMPATIBILITY SameMajorVersion)
++
++    install(FILES ${CMAKE_CURRENT_BINARY_DIR}/OpusConfig.cmake
++                  ${CMAKE_CURRENT_BINARY_DIR}/OpusConfigVersion.cmake
++            DESTINATION ${CMAKE_INSTALL_PACKAGEDIR})
+   endif()
+-  configure_file(opus.pc.in opus.pc)
+-  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/opus.pc
+-          DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
+-endif()
+-
+-if(OPUS_INSTALL_CMAKE_CONFIG_MODULE)
+-  set(CPACK_GENERATOR TGZ)
+-  include(CPack)
+-  set(CMAKE_INSTALL_PACKAGEDIR ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME})
+-  install(EXPORT OpusTargets
+-          NAMESPACE Opus::
+-          DESTINATION ${CMAKE_INSTALL_PACKAGEDIR})
+-
+-  include(CMakePackageConfigHelpers)
+-
+-  set(INCLUDE_INSTALL_DIR ${CMAKE_INSTALL_INCLUDEDIR})
+-  configure_package_config_file(${PROJECT_SOURCE_DIR}/cmake/OpusConfig.cmake.in
+-                                OpusConfig.cmake
+-                                INSTALL_DESTINATION
+-                                ${CMAKE_INSTALL_PACKAGEDIR}
+-                                PATH_VARS
+-                                INCLUDE_INSTALL_DIR
+-                                INSTALL_PREFIX
+-                                ${CMAKE_INSTALL_PREFIX})
+-  write_basic_package_version_file(OpusConfigVersion.cmake
+-                                   VERSION ${PROJECT_VERSION}
+-                                   COMPATIBILITY SameMajorVersion)
+-  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/OpusConfig.cmake
+-                ${CMAKE_CURRENT_BINARY_DIR}/OpusConfigVersion.cmake
+-          DESTINATION ${CMAKE_INSTALL_PACKAGEDIR})
+ endif()
+ 
+ if(OPUS_BUILD_PROGRAMS)