submodule: change core into nomarl folder, and move KDockWidgets into third_party.

.gitmodules

@@ -1,8 +1,4 @@
-[submodule "ext/core"]
-	path = ext/core
-	url = https://github.com/OliveCommunity/core.git
-	branch = dev
-[submodule "ext/KDDockWidgets"]
-	path = ext/KDDockWidgets
+[submodule "third_party/KDDockWidgets"]
+	path = third_party/KDDockWidgets
 	url = https://github.com/OliveCommunity/KDDockWidgets.git
 	branch = main

CMakeLists.txt

@@ -133,7 +133,7 @@ list(APPEND OLIVE_INCLUDE_DIRS ${OPENEXR_INCLUDES})
 
 # Link Olive
 list(APPEND OLIVE_LIBRARIES olivecore)
-list(APPEND OLIVE_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/ext/core/include)
+list(APPEND OLIVE_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/core/include)
 
 
 # Link Qt
@@ -327,9 +327,17 @@ if(BUILD_DOXYGEN)
 endif()
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
-list(APPEND OLIVE_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/ext)
+list(APPEND OLIVE_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/third_party)
+
+add_subdirectory(core EXCLUDE_FROM_ALL)
+
+set(KDDockWidgets_STATIC ON CACHE INTERNAL "Force KDDockWidgets to build statically")
+set(KDDockWidgets_QT6 ${BUILD_QT6} CACHE INTERNAL "Conform KDDockWidgets' Qt 6 setting to ours")
+# Oak only uses the QtWidgets frontend; building the QtQuick frontend causes
+# duplicate QML module registration on macOS and pulls in unused dependencies.
+set(KDDockWidgets_FRONTENDS "qtwidgets" CACHE INTERNAL "Only build the QtWidgets frontend for Oak")
+add_subdirectory(third_party/KDDockWidgets EXCLUDE_FROM_ALL)
 
-add_subdirectory(ext)
 add_subdirectory(third_party/openfx/HostSupport)
 add_subdirectory(app)
 

core/.gitignore

@@ -0,0 +1,2 @@
+*.user
+build/

core/CMakeLists.txt

@@ -0,0 +1,100 @@
+# libolivecore
+# Copyright (C) 2023 Olive Studios LLC
+# Modifications Copyright (C) 2025 mikesolar
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+cmake_minimum_required(VERSION 3.13 FATAL_ERROR)
+
+project(libolivecore VERSION 1.0.0 LANGUAGES CXX)
+
+option(OLIVECORE_BUILD_TESTS ON)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+
+# Link avutil
+find_package(FFMPEG 6.0 REQUIRED
+  COMPONENTS avutil
+)
+
+# Link Imath
+find_package(Imath REQUIRED CONFIG)
+
+# Link OpenGL
+if(UNIX AND NOT APPLE AND NOT DEFINED OpenGL_GL_PREFERENCE)
+  set(OpenGL_GL_PREFERENCE LEGACY)
+endif()
+find_package(OpenGL REQUIRED)
+
+add_library(olivecore
+  src/render/audioparams.cpp
+  src/render/samplebuffer.cpp
+  src/util/bezier.cpp
+  src/util/color.cpp
+  src/util/rational.cpp
+  src/util/stringutils.cpp
+  src/util/tests.cpp
+  src/util/timecodefunctions.cpp
+  src/util/timerange.cpp
+  src/util/value.cpp
+)
+
+target_include_directories(olivecore PRIVATE
+  ${FFMPEG_INCLUDE_DIRS}
+  "${CMAKE_CURRENT_SOURCE_DIR}/include/olive/core"
+  "${CMAKE_SOURCE_DIR}/third_party/openfx/include/"
+)
+
+target_link_libraries(olivecore PRIVATE
+  OpenGL::GL
+  Imath::Imath
+  FFMPEG::avutil
+)
+
+# Link OpenTimelineIO (optional)
+find_package(OpenTimelineIO)
+if (OpenTimelineIO_FOUND)
+  target_compile_definitions(olivecore PRIVATE USE_OTIO)
+  target_include_directories(olivecore PRIVATE ${OTIO_INCLUDE_DIRS})
+  target_link_libraries(olivecore PRIVATE ${OTIO_LIBRARIES})
+else()
+  message("   OpenTimelineIO interchange will be disabled.")
+endif()
+
+install(TARGETS olivecore)
+install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/olive" DESTINATION "${CMAKE_INSTALL_PREFIX}/include")
+
+if (OLIVECORE_BUILD_TESTS)
+  enable_testing()
+
+  function(make_test name)
+    add_executable(${name}
+      tests/${name}.cpp
+    )
+    target_link_libraries(${name} PRIVATE olivecore)
+    target_include_directories(${name} PRIVATE
+      "${CMAKE_CURRENT_SOURCE_DIR}/include/olive/core"
+    )
+    add_test(${name} ${name})
+  endfunction()
+
+  make_test(rational-test)
+  make_test(stringutils-test)
+  make_test(timecode-test)
+  make_test(timerange-test)
+endif()

core/README.md

@@ -0,0 +1,3 @@
+# libolivecore
+
+GPU core library used for various video-related applications. Currently supports OpenGL, will soon support Vulkan.

core/cmake/FindFFMPEG.cmake

@@ -0,0 +1,197 @@
+#[==[
+Provides the following variables:
+
+  * `FFMPEG_INCLUDE_DIRS`: Include directories necessary to use FFMPEG.
+  * `FFMPEG_LIBRARIES`: Libraries necessary to use FFMPEG. Note that this only
+    includes libraries for the components requested.
+  * `FFMPEG_VERSION`: The version of FFMPEG found.
+
+The following components are supported:
+
+  * `avcodec`
+  * `avdevice`
+  * `avfilter`
+  * `avformat`
+  * `avresample`
+  * `avutil`
+  * `swresample`
+  * `swscale`
+
+For each component, the following are provided:
+
+  * `FFMPEG_<component>_FOUND`: Libraries for the component.
+  * `FFMPEG_<component>_INCLUDE_DIRS`: Include directories for
+    the component.
+  * `FFMPEG_<component>_LIBRARIES`: Libraries for the component.
+  * `FFMPEG::<component>`: A target to use with `target_link_libraries`.
+
+Note that only components requested with `COMPONENTS` or `OPTIONAL_COMPONENTS`
+are guaranteed to set these variables or provide targets.
+#]==]
+
+function (_ffmpeg_find component headername)
+  if (${FFMPEG_${component}_FOUND})
+    return()
+  endif()
+
+  find_path("FFMPEG_${component}_INCLUDE_DIR"
+    NAMES
+      "lib${component}/${headername}"
+    PATHS
+      "${FFMPEG_ROOT}/include"
+      ~/Library/Frameworks
+      /Library/Frameworks
+      /usr/local/include
+      /usr/include
+      /sw/include # Fink
+      /opt/local/include # DarwinPorts
+      /opt/csw/include # Blastwave
+      /opt/include
+      /usr/freeware/include
+    PATH_SUFFIXES
+      ffmpeg
+    DOC "FFMPEG's ${component} include directory")
+  mark_as_advanced("FFMPEG_${component}_INCLUDE_DIR")
+
+  # On Windows, static FFMPEG is sometimes built as `lib<name>.a`.
+  if (WIN32)
+    list(APPEND CMAKE_FIND_LIBRARY_SUFFIXES ".a" ".lib")
+    list(APPEND CMAKE_FIND_LIBRARY_PREFIXES "" "lib")
+  endif ()
+
+  find_library("FFMPEG_${component}_LIBRARY"
+    NAMES
+      "${component}"
+    PATHS
+      "${FFMPEG_ROOT}/lib"
+      ~/Library/Frameworks
+      /Library/Frameworks
+      /usr/local/lib
+      /usr/local/lib64
+      /usr/lib
+      /usr/lib64
+      /sw/lib
+      /opt/local/lib
+      /opt/csw/lib
+      /opt/lib
+      /usr/freeware/lib64
+      "${FFMPEG_ROOT}/bin"
+    DOC "FFMPEG's ${component} library")
+  mark_as_advanced("FFMPEG_${component}_LIBRARY")
+
+  if (FFMPEG_${component}_LIBRARY AND FFMPEG_${component}_INCLUDE_DIR)
+    set(_deps_found TRUE)
+    set(_deps_link)
+    foreach (_ffmpeg_dep IN LISTS ARGN)
+      if (TARGET "FFMPEG::${_ffmpeg_dep}")
+        list(APPEND _deps_link "FFMPEG::${_ffmpeg_dep}")
+      else ()
+        set(_deps_found FALSE)
+      endif ()
+    endforeach ()
+    if (_deps_found)
+      add_library("FFMPEG::${component}" UNKNOWN IMPORTED)
+      set_target_properties("FFMPEG::${component}" PROPERTIES
+        IMPORTED_LOCATION "${FFMPEG_${component}_LIBRARY}"
+        INTERFACE_INCLUDE_DIRECTORIES "${FFMPEG_${component}_INCLUDE_DIR}"
+        IMPORTED_LINK_INTERFACE_LIBRARIES "${_deps_link}")
+      set("FFMPEG_${component}_FOUND" 1
+        PARENT_SCOPE)
+
+      set(version_header_path "${FFMPEG_${component}_INCLUDE_DIR}/lib${component}/version.h")
+      if (EXISTS "${version_header_path}")
+        string(TOUPPER "${component}" component_upper)
+        file(STRINGS "${version_header_path}" version
+          REGEX "#define  *LIB${component_upper}_VERSION_(MAJOR|MINOR|MICRO) ")
+        string(REGEX REPLACE ".*_MAJOR *\([0-9]*\).*" "\\1" major "${version}")
+        string(REGEX REPLACE ".*_MINOR *\([0-9]*\).*" "\\1" minor "${version}")
+        string(REGEX REPLACE ".*_MICRO *\([0-9]*\).*" "\\1" micro "${version}")
+        if (NOT major STREQUAL "" AND
+            NOT minor STREQUAL "" AND
+            NOT micro STREQUAL "")
+          set("FFMPEG_${component}_VERSION" "${major}.${minor}.${micro}"
+            PARENT_SCOPE)
+        endif ()
+      endif ()
+    else ()
+      set("FFMPEG_${component}_FOUND" 0
+        PARENT_SCOPE)
+      set(what)
+      if (NOT FFMPEG_${component}_LIBRARY)
+        set(what "library")
+      endif ()
+      if (NOT FFMPEG_${component}_INCLUDE_DIR)
+        if (what)
+          string(APPEND what " or headers")
+        else ()
+          set(what "headers")
+        endif ()
+      endif ()
+      set("FFMPEG_${component}_NOT_FOUND_MESSAGE"
+        "Could not find the ${what} for ${component}."
+        PARENT_SCOPE)
+    endif ()
+  endif ()
+endfunction ()
+
+_ffmpeg_find(avutil     avutil.h)
+_ffmpeg_find(avresample avresample.h
+  avutil)
+_ffmpeg_find(swresample swresample.h
+  avutil)
+_ffmpeg_find(swscale    swscale.h
+  avutil)
+_ffmpeg_find(avcodec    avcodec.h
+  avutil)
+_ffmpeg_find(avformat   avformat.h
+  avcodec avutil)
+_ffmpeg_find(avfilter   avfilter.h
+  avutil)
+_ffmpeg_find(avdevice   avdevice.h
+  avformat avutil)
+
+if (TARGET FFMPEG::avutil)
+  set(_ffmpeg_version_header_path "${FFMPEG_avutil_INCLUDE_DIR}/libavutil/ffversion.h")
+  if (EXISTS "${_ffmpeg_version_header_path}")
+    file(STRINGS "${_ffmpeg_version_header_path}" _ffmpeg_version
+      REGEX "FFMPEG_VERSION")
+    string(REGEX REPLACE ".*\"n?\(.*\)\"" "\\1" FFMPEG_VERSION "${_ffmpeg_version}")
+    unset(_ffmpeg_version)
+  else ()
+    set(FFMPEG_VERSION FFMPEG_VERSION-NOTFOUND)
+  endif ()
+  unset(_ffmpeg_version_header_path)
+endif ()
+
+set(FFMPEG_INCLUDE_DIRS)
+set(FFMPEG_LIBRARIES)
+set(_ffmpeg_required_vars)
+foreach (_ffmpeg_component IN LISTS FFMPEG_FIND_COMPONENTS)
+  if (TARGET "FFMPEG::${_ffmpeg_component}")
+    set(FFMPEG_${_ffmpeg_component}_INCLUDE_DIRS
+      "${FFMPEG_${_ffmpeg_component}_INCLUDE_DIR}")
+    set(FFMPEG_${_ffmpeg_component}_LIBRARIES
+      "${FFMPEG_${_ffmpeg_component}_LIBRARY}")
+    list(APPEND FFMPEG_INCLUDE_DIRS
+      "${FFMPEG_${_ffmpeg_component}_INCLUDE_DIRS}")
+    list(APPEND FFMPEG_LIBRARIES
+      "${FFMPEG_${_ffmpeg_component}_LIBRARIES}")
+    if (FFMEG_FIND_REQUIRED_${_ffmpeg_component})
+      list(APPEND _ffmpeg_required_vars
+        "FFMPEG_${_ffmpeg_required_vars}_INCLUDE_DIRS"
+        "FFMPEG_${_ffmpeg_required_vars}_LIBRARIES")
+    endif ()
+  endif ()
+endforeach ()
+unset(_ffmpeg_component)
+
+if (FFMPEG_INCLUDE_DIRS)
+  list(REMOVE_DUPLICATES FFMPEG_INCLUDE_DIRS)
+endif ()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(FFMPEG
+  REQUIRED_VARS FFMPEG_INCLUDE_DIRS FFMPEG_LIBRARIES ${_ffmpeg_required_vars}
+  VERSION_VAR FFMPEG_VERSION
+  HANDLE_COMPONENTS)
+unset(_ffmpeg_required_vars)

core/cmake/FindOpenTimelineIO.cmake

@@ -0,0 +1,133 @@
+# Olive - Non-Linear Video Editor
+# Copyright (C) 2023 Olive Studios LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+if(UNIX)
+    find_path(OTIO_BASE_DIR
+            include/opentimelineio/timeline.h
+        HINTS
+            "${OTIO_LOCATION}"
+            "$ENV{OTIO_LOCATION}"
+            "/opt/otio"
+    )
+    find_path(OTIO_LIBRARY_DIR
+            libopentimelineio.so
+        HINTS
+            "${OTIO_LOCATION}"
+            "$ENV{OTIO_LOCATION}"
+            "${OTIO_BASE_DIR}"
+        PATH_SUFFIXES
+            lib/
+        DOC
+            "OpenTimelineIO library path"
+    )
+elseif(WIN32)
+    find_path(OTIO_BASE_DIR
+            include/opentimelineio/timeline.h
+        HINTS
+            "${OTIO_LOCATION}"
+            "$ENV{OTIO_LOCATION}"
+    )
+    find_path(OTIO_LIBRARY_DIR
+            opentimelineio.lib
+        HINTS
+            "${OTIO_LOCATION}"
+            "$ENV{OTIO_LOCATION}"
+            "${OTIO_BASE_DIR}"
+        PATH_SUFFIXES
+            lib/
+        DOC
+            "OpenTimelineIO library path"
+    )
+endif()
+
+find_path(OTIO_INCLUDE_DIR
+        opentimelineio/timeline.h
+    HINTS
+        "${OTIO_LOCATION}"
+        "$ENV{OTIO_LOCATION}"
+        "${OTIO_BASE_DIR}"
+    PATH_SUFFIXES
+        include/
+    DOC
+        "OpenTimelineIO headers path"
+)
+
+list(APPEND OTIO_INCLUDE_DIRS ${OTIO_INCLUDE_DIR})
+
+find_path(OTIO_DEPS_INCLUDE_DIR
+        any/any.hpp
+    HINTS
+        "${OTIO_LOCATION}"
+        "$ENV{OTIO_LOCATION}"
+        "${OTIO_BASE_DIR}"
+    PATH_SUFFIXES
+        include/opentimelineio/deps/
+    DOC
+        "OpenTimelineIO headers path"
+)
+
+list(APPEND OTIO_INCLUDE_DIRS ${OTIO_DEPS_INCLUDE_DIR})
+
+find_path(OT_INCLUDE_DIR
+        opentime/rationalTime.h
+    HINTS
+        "${OTIO_LOCATION}"
+        "$ENV{OTIO_LOCATION}"
+        "${OTIO_BASE_DIR}"
+    PATH_SUFFIXES
+        include/
+    DOC
+        "OpenTime headers path"
+)
+
+list(APPEND OTIO_INCLUDE_DIRS ${OT_INCLUDE_DIR})
+
+find_library(OTIO_LIBRARY
+        opentimelineio
+    HINTS
+        "${OTIO_LOCATION}"
+        "$ENV{OTIO_LOCATION}"
+        "${OTIO_BASE_DIR}"
+    PATH_SUFFIXES
+        lib/
+    DOC
+        "OTIO's ${OTIO_LIB} library path"
+)
+
+list(APPEND OTIO_LIBRARIES ${OTIO_LIBRARY})
+
+find_library(OT_LIBRARY
+        opentime
+    HINTS
+        "${OTIO_LOCATION}"
+        "$ENV{OTIO_LOCATION}"
+        "${OTIO_BASE_DIR}"
+    PATH_SUFFIXES
+        lib/
+    DOC
+        "OpenTime's ${OTIO_LIB} library path"
+)
+
+list(APPEND OTIO_LIBRARIES ${OT_LIBRARY})
+
+include(FindPackageHandleStandardArgs)
+
+find_package_handle_standard_args(OpenTimelineIO
+    REQUIRED_VARS
+        OTIO_LIBRARIES
+        OTIO_INCLUDE_DIRS
+        OTIO_DEPS_INCLUDE_DIR
+)

core/include/olive/core/core.h

@@ -0,0 +1,38 @@
+/*
+ * Olive Community Edition - Non-Linear Video Editor
+ * Copyright (C) 2025 Olive CE Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBOLIVECORE_H
+#define LIBOLIVECORE_H
+
+#include "render/audioparams.h"
+#include "render/pixelformat.h"
+#include "render/samplebuffer.h"
+#include "render/sampleformat.h"
+#include "util/bezier.h"
+#include "util/color.h"
+#include "util/cpuoptimize.h"
+#include "util/log.h"
+#include "util/math.h"
+#include "util/rational.h"
+#include "util/stringutils.h"
+#include "util/tests.h"
+#include "util/timecodefunctions.h"
+#include "util/timerange.h"
+#include "util/value.h"
+
+#endif // LIBOLIVECORE_H

core/include/olive/core/render/audioparams.h

@@ -0,0 +1,315 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_AUDIOPARAMS_H
+#define LIBOLIVECORE_AUDIOPARAMS_H
+#include <cstring>
+
+extern "C" {
+#include <libavutil/channel_layout.h>
+}
+
+#include <assert.h>
+#include <vector>
+
+#include "sampleformat.h"
+#include "../util/rational.h"
+
+namespace olive::core
+{
+
+/**
+ * @brief Audio parameters class managing audio stream configuration
+ * 
+ * CRITICAL NOTE: This class manages AVChannelLayout which contains dynamic memory
+ * (custom channel maps via u.map pointer). Prior to the Rule of Three implementation,
+ * shallow copies could occur when:
+ * - AudioParams stored in QVector (QVector reallocations)
+ * - AudioParams passed by value to RenderVideoParams
+ * - AudioParams copied during Node graph duplication in ProjectCopier
+ * 
+ * When shallow copies occurred, one copy's set_channel_layout() could free the
+ * shared u.map pointer, corrupting other copies. This manifested as:
+ * - channel_layouts=0x0 errors in AudioProcessor::Open()
+ * - is_valid() returning false unexpectedly
+ * 
+ * The Rule of Three (copy ctor, copy assignment, destructor) was added to ensure
+ * proper deep copies of AVChannelLayout using av_channel_layout_copy().
+ */
+class AudioParams {
+public:
+	/**
+	 * @brief Default constructor creates invalid AudioParams
+	 * sample_rate=0, channel_layout empty, format=INVALID
+	 */
+	AudioParams()
+		: sample_rate_(0)
+		, channel_layout_{}
+		, channel_count_(0)
+		, format_(SampleFormat::INVALID)
+	{
+		set_default_footage_parameters();
+	}
+
+	/**
+	 * @brief Constructor from AVChannelLayout (deep copy)
+	 * @param sample_rate Audio sample rate (e.g., 48000)
+	 * @param channel_layout FFmpeg channel layout (copied via av_channel_layout_copy)
+	 * @param format Sample format (e.g., SampleFormat::F32P)
+	 * 
+	 * NOTE: The channel_layout parameter is deep-copied. The original can be
+	 * safely uninit'd after this constructor returns.
+	 */
+	AudioParams(const int &sample_rate, const AVChannelLayout &channel_layout,
+				const SampleFormat &format)
+		: sample_rate_(sample_rate)
+		, channel_layout_{}
+		, channel_count_(0)
+		, format_(format)
+	{
+		set_default_footage_parameters();
+		timebase_ = sample_rate_as_time_base();
+		av_channel_layout_uninit(&channel_layout_);
+		av_channel_layout_copy(&channel_layout_, &channel_layout);
+
+		// Cache channel count from the copied layout
+		calculate_channel_count();
+	}
+
+	/**
+	 * @brief Constructor from channel layout mask
+	 * @param sample_rate Audio sample rate
+	 * @param channel_layout Channel layout mask (e.g., AV_CH_LAYOUT_STEREO)
+	 * @param format Sample format
+	 * 
+	 * This is the most common constructor used in Olive. The mask is converted
+	 * to AVChannelLayout via av_channel_layout_from_mask().
+	 */
+	AudioParams(const int &sample_rate, uint64_t channel_layout,
+				const SampleFormat &format)
+		: sample_rate_(sample_rate)
+		, channel_layout_{}
+		, channel_count_(0)
+		, format_(format)
+	{
+		set_default_footage_parameters();
+		timebase_ = sample_rate_as_time_base();
+		av_channel_layout_uninit(&channel_layout_);
+		av_channel_layout_from_mask(&channel_layout_, channel_layout);
+		// Cache channel count
+		calculate_channel_count();
+	}
+	int sample_rate() const
+	{
+		return sample_rate_;
+	}
+
+	void set_sample_rate(int sample_rate)
+	{
+		sample_rate_ = sample_rate;
+	}
+
+	const AVChannelLayout &channel_layout() const
+	{
+		return channel_layout_;
+	}
+
+	/**
+	 * @brief Set channel layout from AVChannelLayout (deep copy)
+	 * @param channel_layout Source channel layout to copy
+	 * 
+	 * CRITICAL: This function first uninitializes the current layout (freeing any
+	 * dynamic memory), then deep-copies the new layout. This is safe only if
+	 * copies are properly managed via Rule of Three.
+	 * 
+	 * If called on a shallow-copied AudioParams, this would corrupt other copies
+	 * that share the same u.map pointer.
+	 */
+	void set_channel_layout(const AVChannelLayout &channel_layout)
+	{
+		av_channel_layout_uninit(&channel_layout_);
+		av_channel_layout_copy(&channel_layout_, &channel_layout);
+		calculate_channel_count();
+	}
+
+	/**
+	 * @brief Set channel layout from mask
+	 * @param mask Channel layout mask (e.g., AV_CH_LAYOUT_STEREO)
+	 */
+	void set_channel_layout(uint64_t mask)
+	{
+		av_channel_layout_uninit(&channel_layout_);
+		av_channel_layout_from_mask(&channel_layout_, mask);
+		calculate_channel_count();
+	}
+	rational time_base() const
+	{
+		return timebase_;
+	}
+
+	void set_time_base(const rational &timebase)
+	{
+		timebase_ = timebase;
+	}
+
+	rational sample_rate_as_time_base() const
+	{
+		return rational(1, sample_rate());
+	}
+
+	SampleFormat format() const
+	{
+		return format_;
+	}
+
+	void set_format(SampleFormat format)
+	{
+		format_ = format;
+	}
+
+	bool enabled() const
+	{
+		return enabled_;
+	}
+
+	void set_enabled(bool e)
+	{
+		enabled_ = e;
+	}
+
+	int stream_index() const
+	{
+		return stream_index_;
+	}
+
+	void set_stream_index(int s)
+	{
+		stream_index_ = s;
+	}
+
+	int64_t duration() const
+	{
+		return duration_;
+	}
+
+	void set_duration(int64_t duration)
+	{
+		duration_ = duration;
+	}
+
+	int64_t time_to_bytes(const double &time) const;
+	int64_t time_to_bytes(const rational &time) const;
+	int64_t time_to_bytes_per_channel(const double &time) const;
+	int64_t time_to_bytes_per_channel(const rational &time) const;
+	int64_t time_to_samples(const double &time) const;
+	int64_t time_to_samples(const rational &time) const;
+	int64_t samples_to_bytes(const int64_t &samples) const;
+	int64_t samples_to_bytes_per_channel(const int64_t &samples) const;
+	rational samples_to_time(const int64_t &samples) const;
+	int64_t bytes_to_samples(const int64_t &bytes) const;
+	rational bytes_to_time(const int64_t &bytes) const;
+	rational bytes_per_channel_to_time(const int64_t &bytes) const;
+	int channel_count() const;
+	int bytes_per_sample_per_channel() const;
+	int bits_per_sample() const;
+	bool is_valid() const;
+
+	bool operator==(const AudioParams &other) const;
+	bool operator!=(const AudioParams &other) const;
+
+	/**
+	 * @name Rule of Three Implementation
+	 * 
+	 * These are required because AVChannelLayout (FFmpeg >= 5.0) contains a union
+	 * with a pointer member (u.map for custom channel maps). Without proper
+	 * deep copy management:
+	 * 
+	 * 1. Default copy constructor: Shallow copies u.map pointer, leading to
+	 *    double-free when original and copy are destroyed
+	 * 2. Default copy assignment: Same issue as copy constructor
+	 * 3. Default destructor: Doesn't free u.map, causing memory leaks
+	 * 
+	 * The implementations use av_channel_layout_copy() and av_channel_layout_uninit()
+	 * for proper FFmpeg-managed memory handling.
+	 * 
+	 * Context where this matters:
+	 * - QVector<AudioParams> in FootageDescription (vector reallocations)
+	 * - RenderVideoParams passing AudioParams by value
+	 * - ProjectCopier duplicating node graphs with audio parameters
+	 */
+	///@{
+	AudioParams(const AudioParams &other);
+	AudioParams &operator=(const AudioParams &other);
+	~AudioParams();
+	///@}
+
+	static const std::vector<uint64_t> kSupportedChannelLayouts;
+	static const std::vector<int> kSupportedSampleRates;
+
+private:
+	void set_default_footage_parameters()
+	{
+		enabled_ = true;
+		stream_index_ = 0;
+		duration_ = 0;
+	}
+
+	/**
+	 * @brief Updates channel_count_ from the current channel_layout_
+	 * Called after any channel layout modification.
+	 */
+	void calculate_channel_count();
+
+	int sample_rate_;                    ///< Audio sample rate in Hz (e.g., 48000)
+
+	/**
+	 * @brief FFmpeg channel layout structure
+	 * 
+	 * WARNING: This struct contains a union with a pointer member (u.map) when
+	 * using custom channel layouts (order == AV_CHANNEL_ORDER_CUSTOM). The pointer
+	 * must be properly managed via av_channel_layout_copy/uninit.
+	 * 
+	 * Layout variants:
+	 * - order == AV_CHANNEL_ORDER_UNSPEC: u.mask is undefined, nb_channels valid
+	 * - order == AV_CHANNEL_ORDER_NATIVE: u.mask contains channel bitmask
+	 * - order == AV_CHANNEL_ORDER_CUSTOM: u.map points to AVChannelCustom array
+	 * 
+	 * Corruption symptoms:
+	 * - u.mask == 0 when order should be NATIVE
+	 * - av_channel_layout_check() returns false
+	 * - is_valid() returns false
+	 */
+	AVChannelLayout channel_layout_;
+
+	int channel_count_;                  ///< Cached channel count from layout
+
+	SampleFormat format_;                ///< Audio sample format
+
+	// Footage-specific parameters (serialized with footage metadata)
+	int enabled_; // Using int instead of bool fixes GCC 11 stringop-overflow issue (byte alignment)
+	int stream_index_;                   ///< Index in the source file's stream list
+	int64_t duration_;                   ///< Stream duration in timebase units
+	rational timebase_;                  ///< Timebase for this audio stream
+};
+
+}
+
+#endif // LIBOLIVECORE_AUDIOPARAMS_H

core/include/olive/core/render/pixelformat.h

@@ -0,0 +1,132 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_PIXELFORMAT_H
+#define LIBOLIVECORE_PIXELFORMAT_H
+#include "ofxCore.h"
+#include <string>
+namespace olive::core
+{
+
+class PixelFormat {
+public:
+	enum Format { INVALID = -1, U8, U10, U16, F16, F32, COUNT };
+
+	PixelFormat(Format f = INVALID)
+	{
+		f_ = f;
+	}
+
+	operator Format() const
+	{
+		return f_;
+	}
+
+	static PixelFormat from_ofx(std::string ofxFormat){
+		if(ofxFormat == kOfxBitDepthByte){
+			return PixelFormat::U8;
+		}
+		else if (ofxFormat == kOfxBitDepthShort){
+			return PixelFormat::U16;
+		}
+		else if(ofxFormat == kOfxBitDepthHalf){
+			return PixelFormat::F16;
+		}
+		else if(ofxFormat == kOfxBitDepthFloat){
+			return PixelFormat::F32;
+		}
+		return PixelFormat::INVALID;
+	}
+	static int byte_count(Format f)
+	{
+		switch (f) {
+		case INVALID:
+		case COUNT:
+			break;
+		case U8:
+			return 1;
+		case U10:
+			return 4; // packed RGBA10A2, treated as 4 bytes per pixel
+		case U16:
+		case F16:
+			return 2;
+		case F32:
+			return 4;
+		}
+
+		return 0;
+	}
+
+	const char *to_string() const
+	{
+		switch (f_) {
+		case U8:
+			return "u8";
+		case U10:
+			return "u10";
+		case U16:
+			return "u16";
+		case F16:
+			return "f16";
+		case F32:
+			return "f32";
+		case INVALID:
+		case COUNT:
+			break;
+		}
+
+		return "";
+	}
+
+	int byte_count() const
+	{
+		return byte_count(f_);
+	}
+
+	static bool is_float(Format f)
+	{
+		switch (f) {
+		case INVALID:
+		case COUNT:
+		case U8:
+		case U10:
+		case U16:
+			break;
+		case F16:
+		case F32:
+			return true;
+		}
+
+		return false;
+	}
+
+	bool is_float() const
+	{
+		return is_float(f_);
+	}
+
+private:
+	Format f_;
+};
+
+}
+
+#endif // LIBOLIVECORE_PIXELFORMAT_H

core/include/olive/core/render/samplebuffer.h

@@ -0,0 +1,137 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_SAMPLEBUFFER_H
+#define LIBOLIVECORE_SAMPLEBUFFER_H
+
+#include <memory>
+#include <vector>
+
+#include "audioparams.h"
+#include "../util/rational.h"
+
+namespace olive::core
+{
+
+/**
+ * @brief A buffer of audio samples
+ *
+ * Audio samples in this structure are always stored in PLANAR (separated by channel). This is done to simplify audio
+ * rendering code. This replaces the old system of using QByteArrays (containing packed audio) and while SampleBuffer
+ * replaces many of those in the rendering/processing side of things, QByteArrays are currently still in use for
+ * playback, including reading to and from the cache.
+ */
+class SampleBuffer {
+public:
+	SampleBuffer();
+	SampleBuffer(const AudioParams &audio_params, const rational &length);
+	SampleBuffer(const AudioParams &audio_params, size_t samples_per_channel);
+
+	SampleBuffer rip_channel(int channel) const;
+	std::vector<float> rip_channel_vector(int channel) const;
+
+	const AudioParams &audio_params() const;
+	void set_audio_params(const AudioParams &params);
+
+	const size_t &sample_count() const
+	{
+		return sample_count_per_channel_;
+	}
+	void set_sample_count(const size_t &sample_count);
+	void set_sample_count(const rational &length)
+	{
+		set_sample_count(audio_params_.time_to_samples(length));
+	}
+
+	float *data(int channel)
+	{
+		return data_[channel].data();
+	}
+
+	const float *data(int channel) const
+	{
+		return data_.at(channel).data();
+	}
+
+	std::vector<float *> to_raw_ptrs()
+	{
+		std::vector<float *> r(data_.size());
+		for (size_t i = 0; i < r.size(); i++) {
+			r[i] = data_[i].data();
+		}
+		return r;
+	}
+
+	int channel_count() const
+	{
+		return data_.size();
+	}
+
+	bool is_allocated() const
+	{
+		return !data_.empty();
+	}
+	void allocate();
+	void destroy();
+
+	void reverse();
+	void speed(double speed);
+
+	void transform_volume(float f);
+	void transform_volume_for_channel(int channel, float volume);
+	static void transform_volume(float f, const SampleBuffer *input,
+								 SampleBuffer *output);
+	static void transform_volume_for_channel(int channel, float volume,
+											 const SampleBuffer *input,
+											 SampleBuffer *output);
+
+	void transform_volume_for_sample(size_t sample_index, float volume);
+	void transform_volume_for_sample_on_channel(size_t sample_index,
+												int channel, float volume);
+
+	void clamp();
+
+	void silence();
+	void silence(size_t start_sample, size_t end_sample);
+	void silence_bytes(size_t start_byte, size_t end_byte);
+
+	void set(int channel, const float *data, size_t sample_offset,
+			 size_t sample_length);
+	void set(int channel, const float *data, size_t sample_length)
+	{
+		set(channel, data, 0, sample_length);
+	}
+
+	void fast_set(const SampleBuffer &other, int to, int from = -1);
+
+private:
+	void clamp_channel(int channel);
+
+	AudioParams audio_params_;
+
+	size_t sample_count_per_channel_;
+
+	std::vector<std::vector<float>> data_;
+};
+
+}
+
+#endif // LIBOLIVECORE_SAMPLEBUFFER_H

core/include/olive/core/render/sampleformat.h

@@ -0,0 +1,288 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_SAMPLEFORMAT_H
+#define LIBOLIVECORE_SAMPLEFORMAT_H
+
+#include <stdexcept>
+#include <string>
+
+namespace olive::core
+{
+
+class SampleFormat {
+public:
+	enum Format {
+		INVALID = -1,
+
+		U8P,
+		S16P,
+		S32P,
+		S64P,
+		F32P,
+		F64P,
+
+		U8,
+		S16,
+		S32,
+		S64,
+		F32,
+		F64,
+
+		COUNT,
+
+		PLANAR_START = U8P,
+		PACKED_START = U8,
+		PLANAR_END = PACKED_START,
+		PACKED_END = COUNT,
+	};
+
+	SampleFormat(Format f = INVALID)
+	{
+		f_ = f;
+	}
+
+	operator Format() const
+	{
+		return f_;
+	}
+
+	static int byte_count(Format f)
+	{
+		switch (f) {
+		case U8:
+		case U8P:
+			return 1;
+		case S16:
+		case S16P:
+			return 2;
+		case S32:
+		case F32:
+		case S32P:
+		case F32P:
+			return 4;
+		case S64:
+		case F64:
+		case S64P:
+		case F64P:
+			return 8;
+		case INVALID:
+		case COUNT:
+			break;
+		}
+
+		return 0;
+	}
+
+	int byte_count() const
+	{
+		return byte_count(f_);
+	}
+
+	static std::string to_string(Format f)
+	{
+		switch (f) {
+		case INVALID:
+		case COUNT:
+			break;
+		case U8:
+			return "u8";
+		case S16:
+			return "s16";
+		case S32:
+			return "s32";
+		case S64:
+			return "s64";
+		case F32:
+			return "f32";
+		case F64:
+			return "f64";
+		case U8P:
+			return "u8p";
+		case S16P:
+			return "s16p";
+		case S32P:
+			return "s32p";
+		case S64P:
+			return "s64p";
+		case F32P:
+			return "f32p";
+		case F64P:
+			return "f64p";
+		}
+
+		return "";
+	}
+
+	std::string to_string() const
+	{
+		return to_string(f_);
+	}
+
+	static SampleFormat from_string(const std::string &s)
+	{
+		if (s.empty()) {
+			return INVALID;
+		} else if (s == "u8") {
+			return U8;
+		} else if (s == "s16") {
+			return S16;
+		} else if (s == "s32") {
+			return S32;
+		} else if (s == "s64") {
+			return S64;
+		} else if (s == "f32") {
+			return F32;
+		} else if (s == "f64") {
+			return F64;
+		} else if (s == "u8p") {
+			return U8P;
+		} else if (s == "s16p") {
+			return S16P;
+		} else if (s == "s32p") {
+			return S32P;
+		} else if (s == "s64p") {
+			return S64P;
+		} else if (s == "f32p") {
+			return F32P;
+		} else if (s == "f64p") {
+			return F64P;
+		} else {
+			// Deprecated: sample formats used to be serialized as an integer. Handle that here, but we'll
+			//             probably remove that eventually.
+			try {
+				int i = std::stoi(s);
+				if (i > INVALID && i < COUNT) {
+					return static_cast<Format>(i);
+				}
+			} catch (const std::invalid_argument &e) {
+			}
+
+			// Failed to deserialize from string
+			return INVALID;
+		}
+	}
+
+	static bool is_packed(Format f)
+	{
+		return f >= PACKED_START && f < PACKED_END;
+	}
+
+	bool is_packed() const
+	{
+		return is_packed(f_);
+	}
+
+	static bool is_planar(Format f)
+	{
+		return f >= PLANAR_START && f < PLANAR_END;
+	}
+
+	bool is_planar() const
+	{
+		return is_planar(f_);
+	}
+
+	static SampleFormat to_packed_equivalent(SampleFormat fmt)
+	{
+		switch (fmt) {
+		// For packed input, just return input
+		case U8:
+		case S16:
+		case S32:
+		case S64:
+		case F32:
+		case F64:
+			return fmt;
+
+		// Convert to packed
+		case U8P:
+			return U8;
+		case S16P:
+			return S16;
+		case S32P:
+			return S32;
+		case S64P:
+			return S64;
+		case F32P:
+			return F32;
+		case F64P:
+			return F64;
+
+		case INVALID:
+		case COUNT:
+			break;
+		}
+
+		return INVALID;
+	}
+
+	SampleFormat to_packed_equivalent() const
+	{
+		return to_packed_equivalent(f_);
+	}
+
+	static SampleFormat to_planar_equivalent(SampleFormat fmt)
+	{
+		switch (fmt) {
+		// Convert to planar
+		case U8:
+			return U8P;
+		case S16:
+			return S16P;
+		case S32:
+			return S32P;
+		case S64:
+			return S64P;
+		case F32:
+			return F32P;
+		case F64:
+			return F64P;
+
+		// For planar input, just return input
+		case U8P:
+		case S16P:
+		case S32P:
+		case S64P:
+		case F32P:
+		case F64P:
+			return fmt;
+
+		case INVALID:
+		case COUNT:
+			break;
+		}
+
+		return INVALID;
+	}
+
+	SampleFormat to_planar_equivalent() const
+	{
+		return to_planar_equivalent(f_);
+	}
+
+private:
+	Format f_;
+};
+
+}
+
+#endif // LIBOLIVECORE_SAMPLEFORMAT_H

core/include/olive/core/util/bezier.h

@@ -0,0 +1,138 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_BEZIER_H
+#define LIBOLIVECORE_BEZIER_H
+
+#include <Imath/ImathVec.h>
+
+namespace olive::core
+{
+
+class Bezier {
+public:
+	Bezier();
+	Bezier(double x, double y);
+	Bezier(double x, double y, double cp1_x, double cp1_y, double cp2_x,
+		   double cp2_y);
+
+	const double &x() const
+	{
+		return x_;
+	}
+	const double &y() const
+	{
+		return y_;
+	}
+	const double &cp1_x() const
+	{
+		return cp1_x_;
+	}
+	const double &cp1_y() const
+	{
+		return cp1_y_;
+	}
+	const double &cp2_x() const
+	{
+		return cp2_x_;
+	}
+	const double &cp2_y() const
+	{
+		return cp2_y_;
+	}
+
+	Imath::V2d to_vec() const
+	{
+		return Imath::V2d(x_, y_);
+	}
+
+	Imath::V2d control_point_1_to_vec() const
+	{
+		return Imath::V2d(cp1_x_, cp1_y_);
+	}
+
+	Imath::V2d control_point_2_to_vec() const
+	{
+		return Imath::V2d(cp2_x_, cp2_y_);
+	}
+
+	void set_x(const double &x)
+	{
+		x_ = x;
+	}
+	void set_y(const double &y)
+	{
+		y_ = y;
+	}
+	void set_cp1_x(const double &cp1_x)
+	{
+		cp1_x_ = cp1_x;
+	}
+	void set_cp1_y(const double &cp1_y)
+	{
+		cp1_y_ = cp1_y;
+	}
+	void set_cp2_x(const double &cp2_x)
+	{
+		cp2_x_ = cp2_x;
+	}
+	void set_cp2_y(const double &cp2_y)
+	{
+		cp2_y_ = cp2_y;
+	}
+
+	static double QuadraticXtoT(double x, double a, double b, double c);
+
+	static double QuadraticTtoY(double a, double b, double c, double t);
+
+	static double QuadraticXtoY(double x, const Imath::V2d &a,
+								const Imath::V2d &b, const Imath::V2d &c)
+	{
+		return QuadraticTtoY(a.y, b.y, c.y, QuadraticXtoT(x, a.x, b.x, c.x));
+	}
+
+	static double CubicXtoT(double x, double a, double b, double c, double d);
+
+	static double CubicTtoY(double a, double b, double c, double d, double t);
+
+	static double CubicXtoY(double x, const Imath::V2d &a, const Imath::V2d &b,
+							const Imath::V2d &c, const Imath::V2d &d)
+	{
+		return CubicTtoY(a.y, b.y, c.y, d.y, CubicXtoT(x, a.x, b.x, c.x, d.x));
+	}
+
+private:
+	static double CalculateTFromX(bool cubic, double x, double a, double b,
+								  double c, double d);
+
+	double x_;
+	double y_;
+
+	double cp1_x_;
+	double cp1_y_;
+
+	double cp2_x_;
+	double cp2_y_;
+};
+
+}
+
+#endif // LIBOLIVECORE_BEZIER_H

core/include/olive/core/util/color.h

@@ -0,0 +1,184 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_COLOR_H
+#define LIBOLIVECORE_COLOR_H
+
+#include "../render/pixelformat.h"
+
+namespace olive::core
+{
+
+/**
+ * @brief High precision 32-bit DataType based RGBA color value
+ */
+class Color {
+public:
+	using DataType = float;
+	static constexpr unsigned int RGBA = 4;
+
+	Color()
+	{
+		for (unsigned int i = 0; i < RGBA; i++) {
+			data_[i] = 0.0;
+		}
+	}
+
+	Color(const DataType &r, const DataType &g, const DataType &b,
+		  const DataType &a = 1.0f)
+	{
+		data_[0] = r;
+		data_[1] = g;
+		data_[2] = b;
+		data_[3] = a;
+	}
+
+	Color(const char *data, const PixelFormat &format, int ch_layout);
+
+	/**
+   * @brief Creates a Color struct from hue/saturation/value
+   *
+   * Hue expects a value between 0.0 and 360.0. Saturation and Value expect a value between 0.0 and 1.0.
+   */
+	static Color fromHsv(const DataType &h, const DataType &s,
+						 const DataType &v);
+
+	const DataType &red() const
+	{
+		return data_[0];
+	}
+	const DataType &green() const
+	{
+		return data_[1];
+	}
+	const DataType &blue() const
+	{
+		return data_[2];
+	}
+	const DataType &alpha() const
+	{
+		return data_[3];
+	}
+
+	void toHsv(DataType *hue, DataType *sat, DataType *val) const;
+	DataType hsv_hue() const;
+	DataType hsv_saturation() const;
+	DataType value() const;
+
+	void toHsl(DataType *hue, DataType *sat, DataType *lightness) const;
+	DataType hsl_hue() const;
+	DataType hsl_saturation() const;
+	DataType lightness() const;
+
+	void set_red(const DataType &red)
+	{
+		data_[0] = red;
+	}
+	void set_green(const DataType &green)
+	{
+		data_[1] = green;
+	}
+	void set_blue(const DataType &blue)
+	{
+		data_[2] = blue;
+	}
+	void set_alpha(const DataType &alpha)
+	{
+		data_[3] = alpha;
+	}
+
+	DataType *data()
+	{
+		return data_;
+	}
+	const DataType *data() const
+	{
+		return data_;
+	}
+
+	void toData(char *out, const PixelFormat &format,
+				unsigned int nb_channels) const;
+
+	static Color fromData(const char *in, const PixelFormat &format,
+						  unsigned int nb_channels);
+
+	// Suuuuper rough luminance value mostly used for UI (determining whether to overlay with black
+	// or white text)
+	DataType GetRoughLuminance() const;
+
+	// Assignment math operators
+	Color &operator+=(const Color &rhs);
+	Color &operator-=(const Color &rhs);
+	Color &operator+=(const DataType &rhs);
+	Color &operator-=(const DataType &rhs);
+	Color &operator*=(const DataType &rhs);
+	Color &operator/=(const DataType &rhs);
+
+	// Binary math operators
+	Color operator+(const Color &rhs) const
+	{
+		Color c(*this);
+		c += rhs;
+		return c;
+	}
+
+	Color operator-(const Color &rhs) const
+	{
+		Color c(*this);
+		c -= rhs;
+		return c;
+	}
+
+	Color operator+(const DataType &rhs) const
+	{
+		Color c(*this);
+		c += rhs;
+		return c;
+	}
+
+	Color operator-(const DataType &rhs) const
+	{
+		Color c(*this);
+		c -= rhs;
+		return c;
+	}
+
+	Color operator*(const DataType &rhs) const
+	{
+		Color c(*this);
+		c *= rhs;
+		return c;
+	}
+
+	Color operator/(const DataType &rhs) const
+	{
+		Color c(*this);
+		c /= rhs;
+		return c;
+	}
+
+private:
+	DataType data_[RGBA];
+};
+
+}
+
+#endif // LIBOLIVECORE_COLOR_H

core/include/olive/core/util/cpuoptimize.h

@@ -0,0 +1,30 @@
+/*
+ * Olive Community Edition - Non-Linear Video Editor
+ * Copyright (C) 2025 Olive CE Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBOLIVECORE_CPUOPTIMIZE_H
+#define LIBOLIVECORE_CPUOPTIMIZE_H
+
+#if defined(__x86_64__) || defined(__i386__)
+#define OLIVE_PROCESSOR_X86
+#include <xmmintrin.h>
+#elif defined(__aarch64__)
+#define OLIVE_PROCESSOR_ARM
+#include "sse2neon.h"
+#endif
+
+#endif // LIBOLIVECORE_CPUOPTIMIZE_H

core/include/olive/core/util/log.h

@@ -0,0 +1,68 @@
+/*
+ * Olive Community Edition - Non-Linear Video Editor
+ * Copyright (C) 2025 Olive CE Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LOG_H
+#define LOG_H
+
+#include <iostream>
+
+namespace olive::core
+{
+
+class Log {
+public:
+	Log(const char *type)
+	{
+		std::cerr << "[" << type << "]";
+	}
+
+	~Log()
+	{
+		std::cerr << std::endl;
+	}
+
+	template <typename T> Log &operator<<(const T &t)
+	{
+		std::cerr << " " << t;
+		return *this;
+	}
+
+	static Log Debug()
+	{
+		return Log("DEBUG");
+	}
+
+	static Log Info()
+	{
+		return Log("INFO");
+	}
+
+	static Log Warning()
+	{
+		return Log("WARNING");
+	}
+
+	static Log Error()
+	{
+		return Log("ERROR");
+	}
+};
+
+}
+
+#endif // LOG_H

core/include/olive/core/util/math.h

@@ -0,0 +1,30 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_MATH_H
+#define LIBOLIVECORE_MATH_H
+
+namespace olive::core
+{
+
+}
+
+#endif // LIBOLIVECORE_MATH_H

core/include/olive/core/util/rational.h

@@ -0,0 +1,168 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_RATIONAL_H
+#define LIBOLIVECORE_RATIONAL_H
+
+extern "C" {
+#include <libavutil/rational.h>
+}
+
+#include <iostream>
+
+#ifdef USE_OTIO
+#include <opentime/rationalTime.h>
+#endif
+
+namespace olive::core
+{
+
+class rational {
+public:
+	rational(const int &numerator = 0)
+	{
+		r_.num = numerator;
+		r_.den = 1;
+	}
+
+	rational(const int &numerator, const int &denominator)
+	{
+		r_.num = numerator;
+		r_.den = denominator;
+
+		fix_signs();
+		reduce();
+	}
+
+	rational(const rational &rhs) = default;
+
+	rational(const AVRational &r)
+	{
+		r_ = r;
+
+		fix_signs();
+	}
+
+	static rational fromDouble(const double &flt, bool *ok = nullptr);
+	static rational fromString(const std::string &str, bool *ok = nullptr);
+
+	static const rational NaN;
+
+	//Assignment Operators
+	const rational &operator=(const rational &rhs);
+	const rational &operator+=(const rational &rhs);
+	const rational &operator-=(const rational &rhs);
+	const rational &operator/=(const rational &rhs);
+	const rational &operator*=(const rational &rhs);
+
+	//Binary math operators
+	rational operator+(const rational &rhs) const;
+	rational operator-(const rational &rhs) const;
+	rational operator/(const rational &rhs) const;
+	rational operator*(const rational &rhs) const;
+
+	//Relational and equality operators
+	bool operator<(const rational &rhs) const;
+	bool operator<=(const rational &rhs) const;
+	bool operator>(const rational &rhs) const;
+	bool operator>=(const rational &rhs) const;
+	bool operator==(const rational &rhs) const;
+	bool operator!=(const rational &rhs) const;
+
+	//Unary operators
+	const rational &operator+() const
+	{
+		return *this;
+	}
+	rational operator-() const
+	{
+		return rational(r_.num, -r_.den);
+	}
+	bool operator!() const
+	{
+		return !r_.num;
+	}
+
+	//Function: convert to double
+	double toDouble() const;
+
+	AVRational toAVRational() const;
+
+#ifdef USE_OTIO
+	static rational fromRationalTime(const opentime::RationalTime &t)
+	{
+		// Is this the best way to do this?
+		return fromDouble(t.to_seconds());
+	}
+
+	// Convert Olive rationals to opentime rationals with the given framerate (defaults to 24)
+	opentime::RationalTime toRationalTime(double framerate = 24) const;
+#endif
+
+	// Produce "flipped" version
+	rational flipped() const;
+	void flip();
+
+	// Returns whether the rational is valid but equal to zero or not
+	//
+	// A NaN is always a null, but a null is not always a NaN
+	bool isNull() const
+	{
+		return r_.num == 0;
+	}
+
+	// Returns whether this rational is not a valid number (denominator == 0)
+	bool isNaN() const
+	{
+		return r_.den == 0;
+	}
+
+	const int &numerator() const
+	{
+		return r_.num;
+	}
+	const int &denominator() const
+	{
+		return r_.den;
+	}
+
+	std::string toString() const;
+
+	friend std::ostream &operator<<(std::ostream &out, const rational &value)
+	{
+		out << value.r_.num << '/' << value.r_.den;
+
+		return out;
+	}
+
+private:
+	void fix_signs();
+	void reduce();
+
+	AVRational r_;
+};
+
+#define RATIONAL_MIN rational(INT_MIN)
+#define RATIONAL_MAX rational(INT_MAX)
+
+}
+
+#endif // LIBOLIVECORE_RATIONAL_H

core/include/olive/core/util/stringutils.h

@@ -0,0 +1,211 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_STRINGUTILS_H
+#define LIBOLIVECORE_STRINGUTILS_H
+
+#include <algorithm>
+#include <regex>
+#include <vector>
+#include <string>
+
+namespace olive::core
+{
+
+class StringUtils {
+public:
+	/**
+   * @brief Split a string into a list of strings using a specific delimiter
+   *
+   * @param s
+   *
+   * The string to split.
+   *
+   * @param separator
+   *
+   * The character to split the string on.
+   *
+   * @return
+   *
+   * A vector of strings split by the specified delimiter.
+   */
+	static std::vector<std::string> split(const std::string &s, char separator);
+
+	/**
+   * @brief Splits a string into a list of strings using regular expressions.
+   *
+   * @param s
+   *
+   * The string to split.
+   *
+   * @param regex
+   *
+   * The regular expression to split the string on.
+   *
+   * @return
+   *
+   * A vector of strings split wherever the regular expression matched.
+   */
+	static std::vector<std::string> split_regex(const std::string &s,
+												const std::regex &regex);
+
+	/**
+   * @brief Convert a string to int using a bool pointer to determine success rather than an exception
+   *
+   * @param s
+   *
+   * The string to parse an int from.
+   *
+   * @param base
+   *
+   * The base of the number in the string (usually 10, or 16 for hex).
+   *
+   * @param ok
+   *
+   * (Optional) a boolean output parameter specifying whether the conversion was successful or not.
+   *
+   * @return
+   *
+   * Either the int parsed from the string, or 0 (with *ok set to false) on parser error.
+   */
+	static int to_int(const std::string &s, int base, bool *ok = nullptr);
+
+	/**
+   * @brief Overloaded function
+   *
+   * @param s
+   *
+   * The string to parse an int from.
+   *
+   * @param ok
+   *
+   * (Optional) a boolean output parameter specifying whether the conversion was successful or not.
+   *
+   * @return
+   *
+   * Either the int parsed from the string, or 0 (with *ok set to false) on parser error.
+   */
+	static int to_int(const std::string &s, bool *ok = nullptr)
+	{
+		return to_int(s, 10, ok);
+	}
+
+	/**
+   * @brief Convert a number to a string with left padding
+   *
+   * Usually used for converting a number to a string with leading zeroes.
+   *
+   * @param val
+   *
+   * The number to convert. This is a templated function and will accept any type, e.g.
+   * int/long/float/double/etc.
+   *
+   * @param padding
+   *
+   * Total desired length of the string. For example, setting this to `2` will ensure the string
+   * is at least 2 characters in size, using `c` to pad the left side where necessary.
+   *
+   * @param c
+   *
+   * The character to pad with. This defaults to `0` assuming you'll be using this function to
+   * create leading zeroes.
+   *
+   * @return
+   *
+   * The padded string.
+   */
+	template <typename T>
+	static std::string to_string_leftpad(T val, size_t padding, char c = '0')
+	{
+		std::string s = std::to_string(val);
+
+		if (s.size() < padding) {
+			s.insert(0, padding - s.size(), c);
+		}
+
+		return s;
+	}
+
+	/**
+   * @brief Format a string
+   *
+   * A sprintf wrapper that returns a std::string.
+   *
+   * @param fmt
+   *
+   * The format to use.
+   *
+   * @return
+   *
+   * A formatted string in std::string form.
+   */
+	static std::string format(const char *fmt, ...);
+
+	// trim from start (in place)
+	static inline void ltrim(std::string &s)
+	{
+		s.erase(s.begin(),
+				std::find_if(s.begin(), s.end(), [](unsigned char ch) {
+					return !std::isspace(ch);
+				}));
+	}
+
+	// trim from end (in place)
+	static inline void rtrim(std::string &s)
+	{
+		s.erase(std::find_if(s.rbegin(), s.rend(),
+							 [](unsigned char ch) { return !std::isspace(ch); })
+					.base(),
+				s.end());
+	}
+
+	// trim from both ends (in place)
+	static inline void trim(std::string &s)
+	{
+		rtrim(s);
+		ltrim(s);
+	}
+
+	// trim from start (copying)
+	static inline std::string ltrimmed(std::string s)
+	{
+		ltrim(s);
+		return s;
+	}
+
+	// trim from end (copying)
+	static inline std::string rtrimmed(std::string s)
+	{
+		rtrim(s);
+		return s;
+	}
+
+	// trim from both ends (copying)
+	static inline std::string trimmed(std::string s)
+	{
+		trim(s);
+		return s;
+	}
+};
+
+}
+
+#endif // LIBOLIVECORE_STRINGUTILS_H

core/include/olive/core/util/tests.h

@@ -0,0 +1,62 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_TESTS_H
+#define LIBOLIVECORE_TESTS_H
+
+#include <list>
+
+namespace olive::core
+{
+
+class Tester {
+public:
+	Tester() = default;
+
+	typedef bool (*test_t)();
+
+	void add(const char *name, test_t test_function)
+	{
+		test_names_.push_back(name);
+		test_functions_.push_back(test_function);
+	}
+
+	bool run();
+
+	int exec()
+	{
+		if (run()) {
+			return 0;
+		} else {
+			return 1;
+		}
+	}
+
+	static void echo(const char *fmt, ...);
+
+private:
+	std::list<const char *> test_names_;
+	std::list<test_t> test_functions_;
+};
+
+}
+
+#endif // LIBOLIVECORE_TESTS_H

core/include/olive/core/util/timecodefunctions.h

@@ -0,0 +1,91 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_TIMECODEFUNCTIONS_H
+#define LIBOLIVECORE_TIMECODEFUNCTIONS_H
+
+#include "rational.h"
+
+namespace olive::core
+{
+
+/**
+ * @brief Functions for converting times/timecodes/timestamps
+ *
+ * Olive uses the following terminology through its code:
+ *
+ * `time` - time in seconds presented in a rational form
+ * `timebase` - the base time unit of an audio/video stream in seconds
+ * `timestamp` - an integer representation of a time in timebase units (in many cases is used like a frame number)
+ * `timecode` a user-friendly string representation of a time according to Timecode::Display
+ */
+class Timecode {
+public:
+	enum Display {
+		kTimecodeDropFrame,
+		kTimecodeNonDropFrame,
+		kTimecodeSeconds,
+		kFrames,
+		kMilliseconds
+	};
+
+	enum Rounding { kCeil, kFloor, kRound };
+
+	/**
+   * @brief Convert a timestamp (according to a rational timebase) to a user-friendly string representation
+   */
+	static std::string time_to_timecode(const rational &time,
+										const rational &timebase,
+										const Display &display,
+										bool show_plus_if_positive = false);
+	static rational timecode_to_time(std::string timecode,
+									 const rational &timebase,
+									 const Display &display,
+									 bool *ok = nullptr);
+
+	static std::string time_to_string(int64_t ms);
+
+	static rational snap_time_to_timebase(const rational &time,
+										  const rational &timebase,
+										  Rounding floor = kRound);
+
+	static int64_t time_to_timestamp(const rational &time,
+									 const rational &timebase,
+									 Rounding floor = kRound);
+	static int64_t time_to_timestamp(const double &time,
+									 const rational &timebase,
+									 Rounding floor = kRound);
+
+	static int64_t rescale_timestamp(const int64_t &ts, const rational &source,
+									 const rational &dest);
+	static int64_t rescale_timestamp_ceil(const int64_t &ts,
+										  const rational &source,
+										  const rational &dest);
+
+	static rational timestamp_to_time(const int64_t &timestamp,
+									  const rational &timebase);
+
+	static bool timebase_is_drop_frame(const rational &timebase);
+};
+
+}
+
+#endif // LIBOLIVECORE_TIMECODEFUNCTIONS_H

core/include/olive/core/util/timerange.h

@@ -0,0 +1,315 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_TIMERANGE_H
+#define LIBOLIVECORE_TIMERANGE_H
+
+#include <list>
+#include <vector>
+
+#include "rational.h"
+
+namespace olive::core
+{
+
+class TimeRange {
+public:
+	TimeRange() = default;
+	TimeRange(const rational &in, const rational &out);
+	TimeRange(const TimeRange &r)
+		: TimeRange(r.in(), r.out())
+	{
+	}
+
+	TimeRange &operator=(const TimeRange &r)
+	{
+		set_range(r.in(), r.out());
+		return *this;
+	}
+
+	const rational &in() const;
+	const rational &out() const;
+	const rational &length() const;
+
+	void set_in(const rational &in);
+	void set_out(const rational &out);
+	void set_range(const rational &in, const rational &out);
+
+	bool operator==(const TimeRange &r) const;
+	bool operator!=(const TimeRange &r) const;
+
+	bool OverlapsWith(const TimeRange &a, bool in_inclusive = true,
+					  bool out_inclusive = true) const;
+	bool Contains(const TimeRange &a, bool in_inclusive = true,
+				  bool out_inclusive = true) const;
+	bool Contains(const rational &r) const;
+
+	TimeRange Combined(const TimeRange &a) const;
+	static TimeRange Combine(const TimeRange &a, const TimeRange &b);
+	TimeRange Intersected(const TimeRange &a) const;
+	static TimeRange Intersect(const TimeRange &a, const TimeRange &b);
+
+	TimeRange operator+(const rational &rhs) const;
+	TimeRange operator-(const rational &rhs) const;
+
+	const TimeRange &operator+=(const rational &rhs);
+	const TimeRange &operator-=(const rational &rhs);
+
+	std::list<TimeRange> Split(const int &chunk_size) const;
+
+private:
+	void normalize();
+
+	rational in_;
+	rational out_;
+	rational length_;
+};
+
+class TimeRangeList {
+public:
+	TimeRangeList() = default;
+
+	TimeRangeList(std::initializer_list<TimeRange> r)
+		: array_(r)
+	{
+	}
+
+	void insert(const TimeRangeList &list_to_add);
+	void insert(TimeRange range_to_add);
+
+	void remove(const TimeRange &remove);
+	void remove(const TimeRangeList &list);
+
+	template <typename T>
+	static void util_remove(std::vector<T> *list, const TimeRange &remove)
+	{
+		std::vector<T> additions;
+
+		for (auto it = list->begin(); it != list->end();) {
+			T &compare = *it;
+
+			if (remove.Contains(compare)) {
+				// This element is entirely encompassed in this range, remove it
+				it = list->erase(it);
+			} else {
+				if (compare.Contains(remove, false, false)) {
+					// The remove range is within this element, only choice is to split the element into two
+					T new_range = compare;
+					new_range.set_in(remove.out());
+					compare.set_out(remove.in());
+
+					additions.push_back(new_range);
+					break;
+				} else {
+					if (compare.in() < remove.in() &&
+						compare.out() > remove.in()) {
+						// This element's out point overlaps the range's in, we'll trim it
+						compare.set_out(remove.in());
+					} else if (compare.in() < remove.out() &&
+							   compare.out() > remove.out()) {
+						// This element's in point overlaps the range's out, we'll trim it
+						compare.set_in(remove.out());
+					}
+
+					it++;
+				}
+			}
+		}
+
+		list->insert(list->end(), additions.begin(), additions.end());
+	}
+
+	bool contains(const TimeRange &range, bool in_inclusive = true,
+				  bool out_inclusive = true) const;
+
+	bool contains(const rational &r) const
+	{
+		for (const TimeRange &range : array_) {
+			if (range.Contains(r)) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	bool OverlapsWith(const TimeRange &r, bool in_inclusive = true,
+					  bool out_inclusive = true) const
+	{
+		for (const TimeRange &range : array_) {
+			if (range.OverlapsWith(r, in_inclusive, out_inclusive)) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	bool isEmpty() const
+	{
+		return array_.empty();
+	}
+
+	void clear()
+	{
+		array_.clear();
+	}
+
+	int size() const
+	{
+		return array_.size();
+	}
+
+	void shift(const rational &diff);
+
+	void trim_in(const rational &diff);
+
+	void trim_out(const rational &diff);
+
+	TimeRangeList Intersects(const TimeRange &range) const;
+
+	using const_iterator = std::vector<TimeRange>::const_iterator;
+
+	const_iterator begin() const
+	{
+		return array_.cbegin();
+	}
+
+	const_iterator end() const
+	{
+		return array_.cend();
+	}
+
+	const_iterator cbegin() const
+	{
+		return begin();
+	}
+
+	const_iterator cend() const
+	{
+		return end();
+	}
+
+	const TimeRange &first() const
+	{
+		return array_.front();
+	}
+
+	const TimeRange &last() const
+	{
+		return array_.back();
+	}
+
+	const TimeRange &at(int index) const
+	{
+		return array_.at(index);
+	}
+
+	const std::vector<TimeRange> &internal_array() const
+	{
+		return array_;
+	}
+
+	bool operator==(const TimeRangeList &rhs) const
+	{
+		return array_ == rhs.array_;
+	}
+
+private:
+	std::vector<TimeRange> array_;
+};
+
+class TimeRangeListFrameIterator {
+public:
+	TimeRangeListFrameIterator();
+	TimeRangeListFrameIterator(const TimeRangeList &list,
+							   const rational &timebase);
+
+	rational Snap(const rational &r) const;
+
+	bool GetNext(rational *out);
+
+	bool HasNext() const;
+
+	std::vector<rational> ToVector() const
+	{
+		TimeRangeListFrameIterator copy(list_, timebase_);
+		std::vector<rational> times;
+		rational r;
+		while (copy.GetNext(&r)) {
+			times.push_back(r);
+		}
+		return times;
+	}
+
+	int size();
+
+	void reset()
+	{
+		*this = TimeRangeListFrameIterator();
+	}
+
+	void insert(const TimeRange &range)
+	{
+		list_.insert(range);
+	}
+
+	void insert(const TimeRangeList &list)
+	{
+		list_.insert(list);
+	}
+
+	bool IsCustomRange() const
+	{
+		return custom_range_;
+	}
+
+	void SetCustomRange(bool e)
+	{
+		custom_range_ = e;
+	}
+
+	int frame_index() const
+	{
+		return frame_index_;
+	}
+
+private:
+	void UpdateIndexIfNecessary();
+
+	TimeRangeList list_;
+
+	rational timebase_;
+
+	rational current_;
+
+	int range_index_;
+
+	int size_;
+
+	int frame_index_;
+
+	bool custom_range_;
+};
+
+}
+
+#endif // LIBOLIVECORE_TIMERANGE_H

core/include/olive/core/util/value.h

@@ -0,0 +1,96 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef LIBOLIVECORE_VALUE_H
+#define LIBOLIVECORE_VALUE_H
+
+#include <map>
+#include <stdint.h>
+#include <string>
+#include <string.h>
+#include <vector>
+
+namespace olive::core
+{
+
+/**
+ * @brief Generic type container
+ */
+class Value {
+public:
+	enum Type {
+		/// Null/no data
+		NONE,
+
+		/// Signed int64
+		INT,
+
+		/// Double-precision float
+		FLOAT,
+
+		/// UTF-8 string
+		STRING
+	};
+
+	Value()
+	{
+		type_ = NONE;
+	}
+
+	Value(int64_t v)
+	{
+		data_.resize(sizeof(int64_t));
+		memcpy(data_.data(), &v, sizeof(int64_t));
+		type_ = INT;
+	}
+
+	Value(double v)
+	{
+		data_.resize(sizeof(double));
+		memcpy(data_.data(), &v, sizeof(int64_t));
+		type_ = FLOAT;
+	}
+
+	Value(const char *s)
+	{
+		size_t sz = strlen(s);
+		data_.resize(sz);
+		memcpy(data_.data(), s, sz);
+		type_ = STRING;
+	}
+
+	Value(const std::string &s)
+	{
+		data_.resize(s.size());
+		memcpy(data_.data(), s.data(), data_.size());
+		type_ = STRING;
+	}
+
+private:
+	std::vector<uint8_t> data_;
+	Type type_;
+};
+
+using ValueMap = std::map<std::string, Value>;
+
+}
+
+#endif // LIBOLIVECORE_VALUE_H

core/src/render/audioparams.cpp

@@ -0,0 +1,237 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "render/audioparams.h"
+
+#include <cmath>
+
+namespace olive::core
+{
+
+const std::vector<int> AudioParams::kSupportedSampleRates = {
+	8000, // 8000 Hz
+	11025, // 11025 Hz
+	16000, // 16000 Hz
+	22050, // 22050 Hz
+	24000, // 24000 Hz
+	32000, // 32000 Hz
+	44100, // 44100 Hz
+	48000, // 48000 Hz
+	88200, // 88200 Hz
+	96000 // 96000 Hz
+};
+
+const std::vector<uint64_t> AudioParams::kSupportedChannelLayouts = {
+	AV_CH_LAYOUT_MONO, AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_2_1,
+	AV_CH_LAYOUT_5POINT1, AV_CH_LAYOUT_7POINT1
+};
+
+bool AudioParams::operator==(const AudioParams &other) const
+{
+	return format() == other.format() && sample_rate() == other.sample_rate() &&
+		   time_base() == other.time_base() &&
+		   av_channel_layout_compare(&channel_layout_,
+									 &other.channel_layout()) == 0;
+}
+
+bool AudioParams::operator!=(const AudioParams &other) const
+{
+	return !(*this == other);
+}
+
+int64_t AudioParams::time_to_bytes(const double &time) const
+{
+	return time_to_bytes_per_channel(time) * channel_count();
+}
+
+int64_t AudioParams::time_to_bytes(const rational &time) const
+{
+	return time_to_bytes(time.toDouble());
+}
+
+int64_t AudioParams::time_to_bytes_per_channel(const double &time) const
+{
+	assert(is_valid());
+
+	return int64_t(time_to_samples(time)) * bytes_per_sample_per_channel();
+}
+
+int64_t AudioParams::time_to_bytes_per_channel(const rational &time) const
+{
+	return time_to_bytes_per_channel(time.toDouble());
+}
+
+int64_t AudioParams::time_to_samples(const double &time) const
+{
+	assert(is_valid());
+
+	return std::round(double(sample_rate()) * time);
+}
+
+int64_t AudioParams::time_to_samples(const rational &time) const
+{
+	return time_to_samples(time.toDouble());
+}
+
+int64_t AudioParams::samples_to_bytes(const int64_t &samples) const
+{
+	assert(is_valid());
+
+	return samples_to_bytes_per_channel(samples) * channel_count();
+}
+
+int64_t AudioParams::samples_to_bytes_per_channel(const int64_t &samples) const
+{
+	assert(is_valid());
+
+	return samples * bytes_per_sample_per_channel();
+}
+
+rational AudioParams::samples_to_time(const int64_t &samples) const
+{
+	return sample_rate_as_time_base() * samples;
+}
+
+int64_t AudioParams::bytes_to_samples(const int64_t &bytes) const
+{
+	assert(is_valid());
+
+	return bytes / (channel_count() * bytes_per_sample_per_channel());
+}
+
+rational AudioParams::bytes_to_time(const int64_t &bytes) const
+{
+	assert(is_valid());
+
+	return samples_to_time(bytes_to_samples(bytes));
+}
+
+rational AudioParams::bytes_per_channel_to_time(const int64_t &bytes) const
+{
+	assert(is_valid());
+
+	return samples_to_time(bytes_to_samples(bytes * channel_count()));
+}
+
+int AudioParams::channel_count() const
+{
+	return channel_count_;
+}
+
+int AudioParams::bytes_per_sample_per_channel() const
+{
+	return format_.byte_count();
+}
+
+int AudioParams::bits_per_sample() const
+{
+	return bytes_per_sample_per_channel() * 8;
+}
+
+bool AudioParams::is_valid() const
+{
+	return (!time_base().isNull() &&
+			av_channel_layout_check(&channel_layout_) &&
+			format_ > SampleFormat::INVALID && format_ < SampleFormat::COUNT);
+}
+
+void AudioParams::calculate_channel_count()
+{
+	channel_count_ = channel_layout().nb_channels;
+}
+
+/**
+ * @brief Copy constructor - deep copies AVChannelLayout
+ * 
+ * This is critical because AVChannelLayout::u.map is a pointer for custom
+ * channel layouts. Default copy would share the pointer, leading to double-free.
+ * 
+ * The member initializer list initializes channel_layout_ to zero ({}),
+ * then av_channel_layout_copy performs the deep copy from other.
+ * 
+ * @param other Source AudioParams to copy from
+ */
+AudioParams::AudioParams(const AudioParams &other)
+	: sample_rate_(other.sample_rate_)
+	, channel_layout_{}  // Zero-initialize before FFmpeg copy
+	, channel_count_(other.channel_count_)
+	, format_(other.format_)
+	, enabled_(other.enabled_)
+	, stream_index_(other.stream_index_)
+	, duration_(other.duration_)
+	, timebase_(other.timebase_)
+{
+	// Deep copy AVChannelLayout using FFmpeg API
+	// This handles all layout types: unspecified, native (mask), and custom (map)
+	av_channel_layout_copy(&channel_layout_, &other.channel_layout_);
+}
+
+/**
+ * @brief Copy assignment - cleans up existing layout before copying
+ * 
+ * CRITICAL ORDER OF OPERATIONS:
+ * 1. Check for self-assignment (this != &other)
+ * 2. Copy all scalar members
+ * 3. Uninitialize current channel_layout_ (frees old u.map if present)
+ * 4. Deep copy from other's channel_layout_
+ * 
+ * Step 3 must happen before step 4 to avoid memory leaks. If we copied first,
+ * we'd lose the pointer to the old u.map that needs to be freed.
+ * 
+ * @param other Source AudioParams to copy from
+ * @return Reference to this for chaining
+ */
+AudioParams &AudioParams::operator=(const AudioParams &other)
+{
+	if (this != &other) {
+		// Copy scalar members first (no dependencies)
+		sample_rate_ = other.sample_rate_;
+		format_ = other.format_;
+		channel_count_ = other.channel_count_;
+		enabled_ = other.enabled_;
+		stream_index_ = other.stream_index_;
+		duration_ = other.duration_;
+		timebase_ = other.timebase_;
+		
+		// Free current layout's dynamic memory (u.map if custom)
+		av_channel_layout_uninit(&channel_layout_);
+		
+		// Deep copy from other (includes allocating new u.map if needed)
+		av_channel_layout_copy(&channel_layout_, &other.channel_layout_);
+	}
+	return *this;
+}
+
+/**
+ * @brief Destructor - frees AVChannelLayout dynamic memory
+ * 
+ * av_channel_layout_uninit() handles all cases:
+ * - Unspecified/Native: No-op (no dynamic memory)
+ * - Custom: Frees u.map array
+ * 
+ * Without this, custom channel layouts would leak memory.
+ */
+AudioParams::~AudioParams()
+{
+	av_channel_layout_uninit(&channel_layout_);
+}
+
+}

core/src/render/samplebuffer.cpp

@@ -0,0 +1,323 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "render/samplebuffer.h"
+
+#include <algorithm>
+#include <assert.h>
+#include <cmath>
+#include <string.h>
+
+#include "util/cpuoptimize.h"
+#include "util/log.h"
+
+namespace olive::core
+{
+
+SampleBuffer::SampleBuffer()
+	: sample_count_per_channel_(0)
+{
+}
+
+SampleBuffer::SampleBuffer(const AudioParams &audio_params,
+						   const rational &length)
+	: audio_params_(audio_params)
+{
+	sample_count_per_channel_ = audio_params_.time_to_samples(length);
+	allocate();
+}
+
+SampleBuffer::SampleBuffer(const AudioParams &audio_params,
+						   size_t samples_per_channel)
+	: audio_params_(audio_params)
+	, sample_count_per_channel_(samples_per_channel)
+{
+	allocate();
+}
+
+SampleBuffer SampleBuffer::rip_channel(int channel) const
+{
+	AudioParams p = this->audio_params_;
+	AVChannelLayout layout;
+	av_channel_layout_from_mask(&layout, AV_CH_LAYOUT_MONO);
+	p.set_channel_layout(layout);
+	av_channel_layout_uninit(&layout);
+
+	SampleBuffer b(p, this->sample_count_per_channel_);
+	b.fast_set(*this, 0, channel);
+	return b;
+}
+
+std::vector<float> SampleBuffer::rip_channel_vector(int channel) const
+{
+	return data_.at(channel);
+}
+
+const AudioParams &SampleBuffer::audio_params() const
+{
+	return audio_params_;
+}
+
+void SampleBuffer::set_audio_params(const AudioParams &params)
+{
+	if (is_allocated()) {
+		Log::Warning() << "Tried to set parameters on allocated sample buffer";
+		return;
+	}
+
+	audio_params_ = params;
+}
+
+void SampleBuffer::set_sample_count(const size_t &sample_count)
+{
+	if (is_allocated()) {
+		Log::Warning()
+			<< "Tried to set sample count on allocated sample buffer";
+		return;
+	}
+
+	sample_count_per_channel_ = sample_count;
+}
+
+void SampleBuffer::allocate()
+{
+	if (!audio_params_.is_valid()) {
+		Log::Warning()
+			<< "Tried to allocate sample buffer with invalid audio parameters";
+		return;
+	}
+
+	if (!sample_count_per_channel_) {
+		Log::Warning()
+			<< "Tried to allocate sample buffer with zero sample count";
+		return;
+	}
+
+	if (is_allocated()) {
+		Log::Warning() << "Tried to allocate already allocated sample buffer";
+		return;
+	}
+
+	data_.resize(audio_params_.channel_count());
+	for (int i = 0; i < audio_params_.channel_count(); i++) {
+		data_[i].resize(sample_count_per_channel_);
+	}
+}
+
+void SampleBuffer::destroy()
+{
+	data_.clear();
+}
+
+void SampleBuffer::reverse()
+{
+	if (!is_allocated()) {
+		Log::Warning() << "Tried to reverse an unallocated sample buffer";
+		return;
+	}
+
+	size_t half_nb_sample = sample_count_per_channel_ / 2;
+
+	for (size_t i = 0; i < half_nb_sample; i++) {
+		size_t opposite_ind = sample_count_per_channel_ - i - 1;
+
+		for (int j = 0; j < audio_params_.channel_count(); j++) {
+			std::swap(data_[j][i], data_[j][opposite_ind]);
+		}
+	}
+}
+
+void SampleBuffer::speed(double speed)
+{
+	if (!is_allocated()) {
+		Log::Warning() << "Tried to speed an unallocated sample buffer";
+		return;
+	}
+
+	sample_count_per_channel_ =
+		std::llround(static_cast<double>(sample_count_per_channel_) / speed);
+
+	std::vector<std::vector<float>> output_data;
+
+	output_data.resize(audio_params_.channel_count());
+	for (int i = 0; i < audio_params_.channel_count(); i++) {
+		output_data[i].resize(sample_count_per_channel_);
+	}
+
+	for (size_t i = 0; i < sample_count_per_channel_; i++) {
+		size_t input_index = std::floor(static_cast<double>(i) * speed);
+
+		for (int j = 0; j < audio_params_.channel_count(); j++) {
+			output_data[j][i] = data_[j][input_index];
+		}
+	}
+
+	data_ = output_data;
+}
+
+void SampleBuffer::transform_volume(float f)
+{
+	transform_volume(f, this, this);
+}
+
+void SampleBuffer::transform_volume_for_channel(int channel, float volume)
+{
+	transform_volume_for_channel(channel, volume, this, this);
+}
+
+void SampleBuffer::transform_volume(float f, const SampleBuffer *input,
+									SampleBuffer *output)
+{
+	assert(input->channel_count() == output->channel_count());
+	assert(input->sample_count_per_channel_ ==
+		   output->sample_count_per_channel_);
+
+	for (int i = 0; i < input->audio_params().channel_count(); i++) {
+		transform_volume_for_channel(i, f, input, output);
+	}
+}
+
+void SampleBuffer::transform_volume_for_channel(int channel, float volume,
+												const SampleBuffer *input,
+												SampleBuffer *output)
+{
+	const float *cdat = input->data_[channel].data();
+	float *odat = output->data_[channel].data();
+	size_t unopt_start = 0;
+
+	assert(input->channel_count() == output->channel_count());
+	assert(input->sample_count_per_channel_ ==
+		   output->sample_count_per_channel_);
+
+#if defined(OLIVE_PROCESSOR_X86) || defined(OLIVE_PROCESSOR_ARM)
+	__m128 mult = _mm_load1_ps(&volume);
+	unopt_start = (input->sample_count_per_channel_ / 4) * 4;
+	for (size_t j = 0; j < unopt_start; j += 4) {
+		const float *in_here = cdat + j;
+		float *out_here = odat + j;
+		__m128 samples = _mm_loadu_ps(in_here);
+		__m128 multiplied = _mm_mul_ps(samples, mult);
+		_mm_storeu_ps(out_here, multiplied);
+	}
+#endif
+
+	for (size_t j = unopt_start; j < input->sample_count_per_channel_; j++) {
+		odat[j] = cdat[j] * volume;
+	}
+}
+
+void SampleBuffer::transform_volume_for_sample(size_t sample_index,
+											   float volume)
+{
+	for (int i = 0; i < audio_params().channel_count(); i++) {
+		transform_volume_for_sample_on_channel(sample_index, i, volume);
+	}
+}
+
+void SampleBuffer::transform_volume_for_sample_on_channel(size_t sample_index,
+														  int channel,
+														  float volume)
+{
+	data_[channel][sample_index] *= volume;
+}
+
+void SampleBuffer::clamp()
+{
+	for (int i = 0; i < channel_count(); i++) {
+		clamp_channel(i);
+	}
+}
+
+void SampleBuffer::silence()
+{
+	silence(0, sample_count_per_channel_);
+}
+
+void SampleBuffer::silence(size_t start_sample, size_t end_sample)
+{
+	silence_bytes(start_sample * sizeof(float), end_sample * sizeof(float));
+}
+
+void SampleBuffer::silence_bytes(size_t start_byte, size_t end_byte)
+{
+	if (!is_allocated()) {
+		Log::Warning() << "Tried to fill an unallocated sample buffer";
+		return;
+	}
+
+	for (int i = 0; i < audio_params().channel_count(); i++) {
+		memset(reinterpret_cast<char *>(data_[i].data()) + start_byte, 0,
+			   end_byte - start_byte);
+	}
+}
+
+void SampleBuffer::set(int channel, const float *data, size_t sample_offset,
+					   size_t sample_length)
+{
+	if (!is_allocated()) {
+		Log::Warning() << "Tried to fill an unallocated sample buffer";
+		return;
+	}
+
+	memcpy(&data_[channel].data()[sample_offset], data,
+		   sizeof(float) * sample_length);
+}
+
+void SampleBuffer::fast_set(const SampleBuffer &other, int to, int from)
+{
+	if (from == -1) {
+		from = to;
+	}
+
+	data_[to] = other.data_[from];
+}
+
+void SampleBuffer::clamp_channel(int channel)
+{
+	const float min = -1.0f;
+	const float max = 1.0f;
+
+	float *cdat = data_[channel].data();
+	size_t unopt_start = 0;
+
+#if defined(OLIVE_PROCESSOR_X86) || defined(OLIVE_PROCESSOR_ARM)
+	__m128 min_sse = _mm_load1_ps(&min);
+	__m128 max_sse = _mm_load1_ps(&max);
+
+	unopt_start = (sample_count_per_channel_ / 4) * 4;
+	for (size_t j = 0; j < unopt_start; j += 4) {
+		float *here = cdat + j;
+		__m128 samples = _mm_loadu_ps(here);
+
+		samples = _mm_max_ps(samples, min_sse);
+		samples = _mm_min_ps(samples, max_sse);
+
+		_mm_storeu_ps(here, samples);
+	}
+#endif
+
+	for (size_t sample = unopt_start; sample < sample_count(); sample++) {
+		float &s = data(channel)[sample];
+		s = std::clamp(s, min, max);
+	}
+}
+
+}

core/src/util/bezier.cpp

@@ -0,0 +1,115 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "util/bezier.h"
+
+#include <algorithm>
+
+namespace olive::core
+{
+
+Bezier::Bezier()
+	: x_(0)
+	, y_(0)
+	, cp1_x_(0)
+	, cp1_y_(0)
+	, cp2_x_(0)
+	, cp2_y_(0)
+{
+}
+
+Bezier::Bezier(double x, double y)
+	: x_(x)
+	, y_(y)
+	, cp1_x_(0)
+	, cp1_y_(0)
+	, cp2_x_(0)
+	, cp2_y_(0)
+{
+}
+
+Bezier::Bezier(double x, double y, double cp1_x, double cp1_y, double cp2_x,
+			   double cp2_y)
+	: x_(x)
+	, y_(y)
+	, cp1_x_(cp1_x)
+	, cp1_y_(cp1_y)
+	, cp2_x_(cp2_x)
+	, cp2_y_(cp2_y)
+{
+}
+
+double Bezier::QuadraticXtoT(double x, double a, double b, double c)
+{
+	// Clamp to prevent infinite loop
+	x = std::clamp(x, a, c);
+
+	return CalculateTFromX(false, x, a, b, c, 0);
+}
+
+double Bezier::QuadraticTtoY(double a, double b, double c, double t)
+{
+	return std::pow(1.0 - t, 2) * a + 2 * (1.0 - t) * t * b +
+		   std::pow(t, 2) * c;
+}
+
+double Bezier::CubicXtoT(double x, double a, double b, double c, double d)
+{
+	// Clamp to prevent infinite loop
+	x = std::clamp(x, a, d);
+
+	return CalculateTFromX(true, x, a, b, c, d);
+}
+
+double Bezier::CubicTtoY(double a, double b, double c, double d, double t)
+{
+	return std::pow(1.0 - t, 3) * a + 3 * std::pow(1.0 - t, 2) * t * b +
+		   3 * (1.0 - t) * std::pow(t, 2) * c + std::pow(t, 3) * d;
+}
+
+double Bezier::CalculateTFromX(bool cubic, double x, double a, double b,
+							   double c, double d)
+{
+	double bottom = 0.0;
+	double top = 1.0;
+
+	while (true) {
+		if (bottom == top) {
+			return bottom;
+		}
+
+		double mid = (bottom + top) * 0.5;
+		double test = cubic ? CubicTtoY(a, b, c, d, mid) :
+							  QuadraticTtoY(a, b, c, mid);
+
+		if (std::abs(test - x) < 0.000001) {
+			return mid;
+		} else if (x > test) {
+			bottom = mid;
+		} else {
+			top = mid;
+		}
+	}
+
+	return NAN;
+}
+
+}

core/src/util/color.cpp

@@ -0,0 +1,324 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "util/color.h"
+
+#include <algorithm>
+#include <cmath>
+#include <Imath/half.h>
+#include <math.h>
+#include <stdint.h>
+
+namespace olive::core
+{
+
+Color Color::fromHsv(const DataType &h, const DataType &s, const DataType &v)
+{
+	DataType C = s * v;
+	DataType X = C * (1.0 - std::abs(std::fmod(h / 60.0, 2.0) - 1.0));
+	DataType m = v - C;
+	DataType Rs, Gs, Bs;
+
+	if (h >= 0.0 && h < 60.0) {
+		Rs = C;
+		Gs = X;
+		Bs = 0.0;
+	} else if (h >= 60.0 && h < 120.0) {
+		Rs = X;
+		Gs = C;
+		Bs = 0.0;
+	} else if (h >= 120.0 && h < 180.0) {
+		Rs = 0.0;
+		Gs = C;
+		Bs = X;
+	} else if (h >= 180.0 && h < 240.0) {
+		Rs = 0.0;
+		Gs = X;
+		Bs = C;
+	} else if (h >= 240.0 && h < 300.0) {
+		Rs = X;
+		Gs = 0.0;
+		Bs = C;
+	} else {
+		Rs = C;
+		Gs = 0.0;
+		Bs = X;
+	}
+
+	return Color(Rs + m, Gs + m, Bs + m);
+}
+
+Color::Color(const char *data, const PixelFormat &format, int ch_layout)
+{
+	*this = fromData(data, format, ch_layout);
+}
+
+void Color::toHsv(DataType *hue, DataType *sat, DataType *val) const
+{
+	DataType fCMax = std::max(std::max(red(), green()), blue());
+	DataType fCMin = std::min(std::min(red(), green()), blue());
+	DataType fDelta = fCMax - fCMin;
+
+	if (fDelta > 0) {
+		if (fCMax == red()) {
+			*hue = 60 * (fmod(((green() - blue()) / fDelta), 6));
+		} else if (fCMax == green()) {
+			*hue = 60 * (((blue() - red()) / fDelta) + 2);
+		} else if (fCMax == blue()) {
+			*hue = 60 * (((red() - green()) / fDelta) + 4);
+		}
+
+		if (fCMax > 0) {
+			*sat = fDelta / fCMax;
+		} else {
+			*sat = 0;
+		}
+
+		*val = fCMax;
+	} else {
+		*hue = 0;
+		*sat = 0;
+		*val = fCMax;
+	}
+
+	if (*hue < 0) {
+		*hue = 360 + *hue;
+	}
+}
+
+Color::DataType Color::hsv_hue() const
+{
+	DataType h, s, v;
+	toHsv(&h, &s, &v);
+	return h;
+}
+
+Color::DataType Color::hsv_saturation() const
+{
+	DataType h, s, v;
+	toHsv(&h, &s, &v);
+	return s;
+}
+
+Color::DataType Color::value() const
+{
+	DataType h, s, v;
+	toHsv(&h, &s, &v);
+	return v;
+}
+
+void Color::toHsl(DataType *hue, DataType *sat, DataType *lightness) const
+{
+	DataType fCMin = std::min(red(), std::min(green(), blue()));
+	DataType fCMax = std::max(red(), std::max(green(), blue()));
+
+	*lightness = 0.5 * (fCMin + fCMax);
+
+	if (fCMin == fCMax) {
+		*sat = 0;
+		*hue = 0;
+		return;
+
+	} else if (*lightness < 0.5) {
+		*sat = (fCMax - fCMin) / (fCMax + fCMin);
+	} else {
+		*sat = (fCMax - fCMin) / (2.0 - fCMax - fCMin);
+	}
+
+	if (fCMax == red()) {
+		*hue = 60 * (green() - blue()) / (fCMax - fCMin);
+	}
+	if (fCMax == green()) {
+		*hue = 60 * (blue() - red()) / (fCMax - fCMin) + 120;
+	}
+	if (fCMax == blue()) {
+		*hue = 60 * (red() - green()) / (fCMax - fCMin) + 240;
+	}
+	if (*hue < 0) {
+		*hue = *hue + 360;
+	}
+}
+
+Color::DataType Color::hsl_hue() const
+{
+	DataType h, s, l;
+	toHsl(&h, &s, &l);
+	return h;
+}
+
+Color::DataType Color::hsl_saturation() const
+{
+	DataType h, s, l;
+	toHsl(&h, &s, &l);
+	return s;
+}
+
+Color::DataType Color::lightness() const
+{
+	DataType h, s, l;
+	toHsl(&h, &s, &l);
+	return l;
+}
+
+void Color::toData(char *out, const PixelFormat &format,
+				   unsigned int nb_channels) const
+{
+	unsigned int count = std::min(RGBA, nb_channels);
+
+	if (format == PixelFormat::U10 && count == 4) {
+		const uint32_t r = static_cast<uint32_t>(std::clamp(data_[0], DataType(0.0), DataType(1.0)) * 1023.0 + 0.5);
+		const uint32_t g = static_cast<uint32_t>(std::clamp(data_[1], DataType(0.0), DataType(1.0)) * 1023.0 + 0.5);
+		const uint32_t b = static_cast<uint32_t>(std::clamp(data_[2], DataType(0.0), DataType(1.0)) * 1023.0 + 0.5);
+		const uint32_t a = static_cast<uint32_t>(std::clamp(data_[3], DataType(0.0), DataType(1.0)) * 3.0 + 0.5);
+		reinterpret_cast<uint32_t *>(out)[0] = r | (g << 10) | (b << 20) | (a << 30);
+		return;
+	}
+
+	for (unsigned int i = 0; i < count; i++) {
+		DataType f = data_[i];
+
+		switch (format) {
+		case PixelFormat::INVALID:
+		case PixelFormat::COUNT:
+			break;
+		case PixelFormat::U8:
+			reinterpret_cast<uint8_t *>(out)[i] = f * 255.0;
+			break;
+		case PixelFormat::U10:
+			// handled above
+			break;
+		case PixelFormat::U16:
+			reinterpret_cast<uint16_t *>(out)[i] = f * 65535.0;
+			break;
+		case PixelFormat::F16:
+			reinterpret_cast<Imath::half *>(out)[i] = f;
+			break;
+		case PixelFormat::F32:
+			reinterpret_cast<float *>(out)[i] = f;
+			break;
+		}
+	}
+}
+
+Color Color::fromData(const char *in, const PixelFormat &format,
+					  unsigned int nb_channels)
+{
+	Color c;
+
+	unsigned int count = std::min(RGBA, nb_channels);
+
+	if (format == PixelFormat::U10 && count == 4) {
+		const uint32_t word = reinterpret_cast<const uint32_t *>(in)[0];
+		c.data_[0] = DataType((word & 0x3ff) / 1023.0);
+		c.data_[1] = DataType(((word >> 10) & 0x3ff) / 1023.0);
+		c.data_[2] = DataType(((word >> 20) & 0x3ff) / 1023.0);
+		c.data_[3] = DataType(((word >> 30) & 0x3) / 3.0);
+		return c;
+	}
+
+	for (unsigned int i = 0; i < count; i++) {
+		DataType &f = c.data_[i];
+
+		switch (format) {
+		case PixelFormat::INVALID:
+		case PixelFormat::COUNT:
+			break;
+		case PixelFormat::U8:
+			f = DataType(reinterpret_cast<const uint8_t *>(in)[i]) / 255.0;
+			break;
+		case PixelFormat::U10:
+			// handled above
+			break;
+		case PixelFormat::U16:
+			f = DataType(reinterpret_cast<const uint16_t *>(in)[i]) / 65535.0;
+			break;
+		case PixelFormat::F16:
+			f = DataType(reinterpret_cast<const Imath::half *>(in)[i]);
+			break;
+		case PixelFormat::F32:
+			f = DataType(reinterpret_cast<const float *>(in)[i]);
+			break;
+		}
+	}
+
+	return c;
+}
+
+Color::DataType Color::GetRoughLuminance() const
+{
+	return (2 * red() + blue() + 3 * green()) / 6.0;
+}
+
+Color &Color::operator+=(const Color &rhs)
+{
+	for (int i = 0; i < RGBA; i++) {
+		data_[i] += rhs.data_[i];
+	}
+
+	return *this;
+}
+
+Color &Color::operator-=(const Color &rhs)
+{
+	for (int i = 0; i < RGBA; i++) {
+		data_[i] -= rhs.data_[i];
+	}
+
+	return *this;
+}
+
+Color &Color::operator+=(const DataType &rhs)
+{
+	for (int i = 0; i < RGBA; i++) {
+		data_[i] += rhs;
+	}
+
+	return *this;
+}
+
+Color &Color::operator-=(const DataType &rhs)
+{
+	for (int i = 0; i < RGBA; i++) {
+		data_[i] -= rhs;
+	}
+
+	return *this;
+}
+
+Color &Color::operator*=(const DataType &rhs)
+{
+	for (int i = 0; i < RGBA; i++) {
+		data_[i] *= rhs;
+	}
+
+	return *this;
+}
+
+Color &Color::operator/=(const DataType &rhs)
+{
+	for (int i = 0; i < RGBA; i++) {
+		data_[i] /= rhs;
+	}
+
+	return *this;
+}
+
+}

core/src/util/rational.cpp

@@ -0,0 +1,286 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "util/rational.h"
+
+#include <math.h>
+
+#include "util/stringutils.h"
+
+namespace olive::core
+{
+
+const rational rational::NaN = rational(0, 0);
+
+rational rational::fromDouble(const double &flt, bool *ok)
+{
+	if (isnan(flt)) {
+		// Return NaN rational
+		if (ok)
+			*ok = false;
+		return NaN;
+	}
+
+	// Use FFmpeg function for the time being
+	AVRational r = av_d2q(flt, INT_MAX);
+
+	if (r.den == 0) {
+		// If den == 0, we were unable to convert to a rational
+		if (ok) {
+			*ok = false;
+		}
+	} else {
+		// Otherwise, assume we received a real rational
+		if (ok) {
+			*ok = true;
+		}
+	}
+
+	return r;
+}
+
+rational rational::fromString(const std::string &str, bool *ok)
+{
+	std::vector<std::string> elements = StringUtils::split(str, '/');
+
+	switch (elements.size()) {
+	case 1:
+		return rational(StringUtils::to_int(elements.front(), ok));
+	case 2:
+		return rational(StringUtils::to_int(elements.at(0), ok),
+						StringUtils::to_int(elements.at(1), ok));
+	default:
+		// Returns NaN with ok set to false
+		if (ok) {
+			*ok = false;
+		}
+		return NaN;
+	}
+}
+
+//Function: convert to double
+
+double rational::toDouble() const
+{
+	if (r_.den != 0) {
+		return av_q2d(r_);
+	} else {
+		return std::numeric_limits<double>::quiet_NaN();
+	}
+}
+
+AVRational rational::toAVRational() const
+{
+	return r_;
+}
+
+#ifdef USE_OTIO
+opentime::RationalTime rational::toRationalTime(double framerate) const
+{
+	// Is this the best way of doing this?
+	// Olive can store rationals as 0/0 which causes errors in OTIO
+	opentime::RationalTime time =
+		opentime::RationalTime(r_.num, r_.den == 0 ? 1 : r_.den);
+	return time.rescaled_to(framerate);
+}
+#endif
+
+rational rational::flipped() const
+{
+	rational r = *this;
+	r.flip();
+	return r;
+}
+
+void rational::flip()
+{
+	if (!isNull()) {
+		std::swap(r_.den, r_.num);
+		fix_signs();
+	}
+}
+
+std::string rational::toString() const
+{
+	return StringUtils::format("%d/%d", r_.num, r_.den);
+}
+
+void rational::fix_signs()
+{
+	if (r_.den < 0) {
+		// Normalize so that denominator is always positive
+		r_.den = -r_.den;
+		r_.num = -r_.num;
+	} else if (r_.den == 0) {
+		// Normalize to 0/0 (aka NaN) if denominator is zero
+		r_.num = 0;
+	} else if (r_.num == 0) {
+		// Normalize to 0/1 if numerator is zero
+		r_.den = 1;
+	}
+}
+
+void rational::reduce()
+{
+	av_reduce(&r_.num, &r_.den, r_.num, r_.den, INT_MAX);
+}
+
+//Assignment Operators
+
+const rational &rational::operator=(const rational &rhs)
+{
+	r_ = rhs.r_;
+	return *this;
+}
+
+const rational &rational::operator+=(const rational &rhs)
+{
+	if (*this == RATIONAL_MIN || *this == RATIONAL_MAX || rhs == RATIONAL_MIN ||
+		rhs == RATIONAL_MAX) {
+		*this = NaN;
+	} else if (!isNaN()) {
+		if (rhs.isNaN()) {
+			*this = NaN;
+		} else {
+			r_ = av_add_q(r_, rhs.r_);
+			fix_signs();
+		}
+	}
+
+	return *this;
+}
+
+const rational &rational::operator-=(const rational &rhs)
+{
+	if (*this == RATIONAL_MIN || *this == RATIONAL_MAX || rhs == RATIONAL_MIN ||
+		rhs == RATIONAL_MAX) {
+		*this = NaN;
+	} else if (!isNaN()) {
+		if (rhs.isNaN()) {
+			*this = NaN;
+		} else {
+			r_ = av_sub_q(r_, rhs.r_);
+			fix_signs();
+		}
+	}
+
+	return *this;
+}
+
+const rational &rational::operator*=(const rational &rhs)
+{
+	if (*this == RATIONAL_MIN || *this == RATIONAL_MAX || rhs == RATIONAL_MIN ||
+		rhs == RATIONAL_MAX) {
+		*this = NaN;
+	} else if (!isNaN()) {
+		if (rhs.isNaN()) {
+			*this = NaN;
+		} else {
+			r_ = av_mul_q(r_, rhs.r_);
+			fix_signs();
+		}
+	}
+
+	return *this;
+}
+
+const rational &rational::operator/=(const rational &rhs)
+{
+	if (*this == RATIONAL_MIN || *this == RATIONAL_MAX || rhs == RATIONAL_MIN ||
+		rhs == RATIONAL_MAX) {
+		*this = NaN;
+	} else if (!isNaN()) {
+		if (rhs.isNaN()) {
+			*this = NaN;
+		} else {
+			r_ = av_div_q(r_, rhs.r_);
+			fix_signs();
+		}
+	}
+
+	return *this;
+}
+
+//Binary math operators
+
+rational rational::operator+(const rational &rhs) const
+{
+	rational answer(*this);
+	answer += rhs;
+	return answer;
+}
+
+rational rational::operator-(const rational &rhs) const
+{
+	rational answer(*this);
+	answer -= rhs;
+	return answer;
+}
+
+rational rational::operator/(const rational &rhs) const
+{
+	rational answer(*this);
+	answer /= rhs;
+	return answer;
+}
+
+rational rational::operator*(const rational &rhs) const
+{
+	rational answer(*this);
+	answer *= rhs;
+	return answer;
+}
+
+//Relational and equality operators
+
+bool rational::operator<(const rational &rhs) const
+{
+	return av_cmp_q(r_, rhs.r_) == -1;
+}
+
+bool rational::operator<=(const rational &rhs) const
+{
+	int cmp = av_cmp_q(r_, rhs.r_);
+	return cmp == 0 || cmp == -1;
+}
+
+bool rational::operator>(const rational &rhs) const
+{
+	return av_cmp_q(r_, rhs.r_) == 1;
+}
+
+bool rational::operator>=(const rational &rhs) const
+{
+	int cmp = av_cmp_q(r_, rhs.r_);
+	return cmp == 0 || cmp == 1;
+}
+
+bool rational::operator==(const rational &rhs) const
+{
+	return av_cmp_q(r_, rhs.r_) == 0;
+}
+
+bool rational::operator!=(const rational &rhs) const
+{
+	return !(*this == rhs);
+}
+
+}

core/src/util/stringutils.cpp

@@ -0,0 +1,107 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "util/stringutils.h"
+
+#include <stdarg.h>
+#include <stdexcept>
+
+namespace olive::core
+{
+
+std::vector<std::string> StringUtils::split(const std::string &s,
+											char separator)
+{
+	std::vector<std::string> output;
+
+	std::string::size_type prev_pos = 0, pos = 0;
+
+	while ((pos = s.find(separator, pos)) != std::string::npos) {
+		std::string substring(s.substr(prev_pos, pos - prev_pos));
+
+		output.push_back(substring);
+
+		prev_pos = ++pos;
+	}
+
+	output.push_back(s.substr(prev_pos, pos - prev_pos)); // Last word
+
+	return output;
+}
+
+std::vector<std::string> StringUtils::split_regex(const std::string &s,
+												  const std::regex &regex)
+{
+	std::vector<std::string> output;
+
+	std::sregex_token_iterator iter(s.begin(), s.end(), regex, -1);
+	std::sregex_token_iterator end;
+	for (; iter != end; iter++) {
+		output.push_back(*iter);
+	}
+
+	return output;
+}
+
+int StringUtils::to_int(const std::string &s, int base, bool *ok)
+{
+	try {
+		int x = std::stoi(s, nullptr, base);
+		if (ok) {
+			*ok = true;
+		}
+		return x;
+	} catch (const std::invalid_argument &e) {
+		if (ok) {
+			*ok = false;
+		}
+		return 0;
+	}
+}
+
+std::string StringUtils::format(const char *fmt, ...)
+{
+	va_list ap1, ap2;
+	va_start(ap1, fmt);
+
+	// Need to duplicate because we call vsnprintf twice and it consumes the va_list each time
+	va_copy(ap2, ap1);
+
+	int s = std::vsnprintf(nullptr, 0, fmt, ap1);
+
+	// Create string with size, adding 1 because vsnprintf will want to write a null terminator
+	std::string r;
+	s++;
+	r.resize(s);
+
+	// Write into string
+	std::vsnprintf(r.data(), s, fmt, ap2);
+
+	// Pop null terminator
+	r.pop_back();
+
+	va_end(ap2);
+	va_end(ap1);
+
+	return r;
+}
+
+}

core/src/util/tests.cpp

@@ -0,0 +1,63 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "util/tests.h"
+
+#include <cstddef>
+#include <cstdio>
+#include <stdarg.h>
+
+namespace olive::core
+{
+
+bool Tester::run()
+{
+	size_t index = 1;
+	size_t count = test_functions_.size();
+
+	while (!test_functions_.empty()) {
+		echo("[%lu/%lu] %s :: ", index, count, test_names_.front());
+
+		if (test_functions_.front()()) {
+			echo("PASSED\n");
+		} else {
+			echo("FAILED\n");
+			return false;
+		}
+
+		test_names_.pop_front();
+		test_functions_.pop_front();
+	}
+
+	return true;
+}
+
+void Tester::echo(const char *fmt, ...)
+{
+	va_list a;
+	va_start(a, fmt);
+
+	vfprintf(stderr, fmt, a);
+
+	va_end(a);
+}
+
+}

core/src/util/timecodefunctions.cpp

@@ -0,0 +1,407 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "util/timecodefunctions.h"
+
+extern "C" {
+#include <libavutil/mathematics.h>
+}
+
+#include "util/stringutils.h"
+
+namespace olive::core
+{
+
+std::string Timecode::time_to_timecode(const rational &time,
+									   const rational &timebase,
+									   const Timecode::Display &display,
+									   bool show_plus_if_positive)
+{
+	if (timebase.isNull() || timebase.flipped().toDouble() < 1) {
+		return "INVALID TIMEBASE";
+	}
+
+	double time_dbl = time.toDouble();
+
+	switch (display) {
+	case kTimecodeNonDropFrame:
+	case kTimecodeDropFrame:
+	case kTimecodeSeconds: {
+		const char *prefix = "";
+
+		if (time_dbl < 0) {
+			prefix = "-";
+		} else if (show_plus_if_positive) {
+			prefix = "+";
+		}
+
+		if (display == kTimecodeSeconds) {
+			time_dbl = std::abs(time_dbl);
+
+			int64_t total_seconds = std::floor(time_dbl);
+
+			int64_t hours = total_seconds / 3600;
+			int64_t mins = total_seconds / 60 - hours * 60;
+			int64_t secs = total_seconds - mins * 60;
+			int64_t fraction = std::llround(
+				(time_dbl - static_cast<double>(total_seconds)) * 1000);
+
+			return StringUtils::format(
+				"%s%s:%s:%s.%s", prefix,
+				StringUtils::to_string_leftpad(hours, 2).c_str(),
+				StringUtils::to_string_leftpad(mins, 2).c_str(),
+				StringUtils::to_string_leftpad(secs, 2).c_str(),
+				StringUtils::to_string_leftpad(fraction, 3).c_str());
+		} else {
+			// Determine what symbol to separate frames (";" is used for drop frame, ":" is non-drop frame)
+			const char *frame_token;
+			double frame_rate = timebase.flipped().toDouble();
+			int rounded_frame_rate = std::llround(frame_rate);
+			int64_t frames, secs, mins, hours;
+			int64_t f = std::abs(time_to_timestamp(time, timebase));
+
+			if (display == kTimecodeDropFrame &&
+				timebase_is_drop_frame(timebase)) {
+				frame_token = ";";
+
+				/**
+         * CONVERT A FRAME NUMBER TO DROP FRAME TIMECODE
+         *
+         * Code by David Heidelberger, adapted from Andrew Duncan, further adapted for Olive by Olive Team
+         * Given an int called framenumber and a double called framerate
+         * Framerate should be 29.97, 59.94, or 23.976, otherwise the calculations will be off.
+         */
+
+				// If frame number is greater than 24 hrs, next operation will rollover clock
+				f %= (std::llround(frame_rate * 3600) * 24);
+
+				// Number of frames per ten minutes
+				int64_t framesPer10Minutes = std::llround(frame_rate * 600);
+				int64_t d = f / framesPer10Minutes;
+				int64_t m = f % framesPer10Minutes;
+
+				// Number of frames to drop on the minute marks is the nearest integer to 6% of the framerate
+				int64_t dropFrames = std::llround(frame_rate * (2.0 / 30.0));
+
+				// Number of frames per minute is the round of the framerate * 60 minus the number of dropped frames
+				f += dropFrames * 9 * d;
+				if (m > dropFrames) {
+					f += dropFrames *
+						 ((m - dropFrames) /
+						  (std::llround(frame_rate) * 60 - dropFrames));
+				}
+			} else {
+				frame_token = ":";
+			}
+
+			// non-drop timecode
+			hours = f / (3600 * rounded_frame_rate);
+			mins = f / (60 * rounded_frame_rate) % 60;
+			secs = f / rounded_frame_rate % 60;
+			frames = f % rounded_frame_rate;
+
+			return StringUtils::format(
+				"%s%s:%s:%s%s%s", prefix,
+				StringUtils::to_string_leftpad(hours, 2).c_str(),
+				StringUtils::to_string_leftpad(mins, 2).c_str(),
+				StringUtils::to_string_leftpad(secs, 2).c_str(), frame_token,
+				StringUtils::to_string_leftpad(frames, 2).c_str());
+		}
+	}
+	case kFrames:
+		return std::to_string(time_to_timestamp(time, timebase));
+	case kMilliseconds:
+		return std::to_string(std::llround(time_dbl * 1000));
+	}
+
+	return "INVALID TIMECODE MODE";
+}
+
+int64_t StrToInt64EmptyTolerant(const std::string &s, bool *ok)
+{
+	if (s.empty()) {
+		if (ok)
+			*ok = true;
+		return 0;
+	} else {
+		try {
+			int64_t ll = std::stoll(s);
+			if (ok)
+				*ok = true;
+			return ll;
+		} catch (const std::invalid_argument &e) {
+			if (ok)
+				*ok = false;
+			return 0;
+		}
+	}
+}
+
+double StrToDoubleEmptyTolerant(const std::string &s, bool *ok)
+{
+	if (s.empty()) {
+		if (ok)
+			*ok = true;
+		return 0;
+	} else {
+		try {
+			double d = std::stod(s);
+			if (ok)
+				*ok = true;
+			return d;
+		} catch (const std::invalid_argument &e) {
+			if (ok)
+				*ok = false;
+			return 0;
+		}
+	}
+}
+
+rational Timecode::timecode_to_time(std::string timecode,
+									const rational &timebase,
+									const Timecode::Display &display, bool *ok)
+{
+	StringUtils::trim(timecode);
+	if (timecode.empty()) {
+		goto err_fatal;
+	}
+
+	switch (display) {
+	case kTimecodeNonDropFrame:
+	case kTimecodeDropFrame:
+	case kTimecodeSeconds: {
+		std::vector<std::string> timecode_split =
+			StringUtils::split_regex(timecode, std::regex("(:)|(;)"));
+
+		const int element_count = display == kTimecodeSeconds ? 3 : 4;
+
+		// Remove excess tokens (we're only interested in HH:MM:SS.FF)
+		if (timecode_split.size() > element_count) {
+			timecode_split.resize(element_count);
+		}
+
+		// For easier index calculations, ensure minimum size
+		if (timecode_split.size() < element_count) {
+			timecode_split.insert(timecode_split.begin(),
+								  element_count - timecode_split.size(),
+								  std::string());
+		}
+
+		bool negative = (timecode.at(0) == '-');
+
+		double frame_rate = timebase.flipped().toDouble();
+		int rounded_frame_rate = std::lround(frame_rate);
+
+		bool valid;
+		rational time;
+
+		int64_t hours = StrToInt64EmptyTolerant(timecode_split.at(0), &valid);
+		if (!valid)
+			goto err_fatal;
+		int64_t mins = StrToInt64EmptyTolerant(timecode_split.at(1), &valid);
+		if (!valid)
+			goto err_fatal;
+
+		if (display == kTimecodeSeconds) {
+			double secs =
+				StrToDoubleEmptyTolerant(timecode_split.at(2), &valid);
+			if (!valid)
+				goto err_fatal;
+
+			time = rational::fromDouble(hours * 3600 + mins * 60 + secs);
+		} else {
+			int64_t secs =
+				StrToInt64EmptyTolerant(timecode_split.at(2), &valid);
+			if (!valid)
+				goto err_fatal;
+			int64_t frames =
+				StrToInt64EmptyTolerant(timecode_split.at(3), &valid);
+			if (!valid)
+				goto err_fatal;
+
+			int64_t sec_count = (hours * 3600 + mins * 60 + secs);
+			int64_t frame_count = sec_count * rounded_frame_rate + frames;
+
+			if (display == kTimecodeDropFrame &&
+				timebase_is_drop_frame(timebase)) {
+				// Number of frames to drop on the minute marks is the nearest integer to 6% of the framerate
+				int64_t dropFrames = std::llround(frame_rate * (2.0 / 30.0));
+
+				// d and m need to be calculated from
+				int64_t real_fr_ts =
+					std::llround(static_cast<double>(sec_count) * frame_rate) +
+					frames;
+
+				int64_t framesPer10Minutes = std::llround(frame_rate * 600);
+				int64_t d = real_fr_ts / framesPer10Minutes;
+				int64_t m = real_fr_ts % framesPer10Minutes;
+
+				if (m > dropFrames) {
+					frame_count -=
+						dropFrames *
+						((m - dropFrames) /
+						 (std::llround(frame_rate) * 60 - dropFrames));
+				}
+				frame_count -= dropFrames * 9 * d;
+			}
+
+			time = timestamp_to_time(frame_count, timebase);
+		}
+
+		if (ok)
+			*ok = true;
+
+		if (negative)
+			time = -time;
+
+		return time;
+	}
+	case kMilliseconds: {
+		try {
+			double timecode_secs = std::stod(timecode);
+
+			// Convert milliseconds to seconds
+			timecode_secs *= 0.001;
+
+			// Convert seconds to rational
+			return rational::fromDouble(timecode_secs, ok);
+		} catch (const std::invalid_argument &e) {
+			goto err_fatal;
+		}
+	}
+	case kFrames: {
+		try {
+			int64_t ts = std::stoll(timecode);
+			if (ok)
+				*ok = true;
+			return timestamp_to_time(ts, timebase);
+		} catch (const std::invalid_argument &e) {
+			goto err_fatal;
+		}
+	}
+	}
+
+err_fatal:
+	if (ok)
+		*ok = false;
+	return 0;
+}
+
+std::string Timecode::time_to_string(int64_t ms)
+{
+	int64_t total_seconds = ms / 1000;
+	int64_t ss = total_seconds % 60;
+	int64_t mm = (total_seconds / 60) % 60;
+	int64_t hh = total_seconds / 3600;
+
+	return StringUtils::format("%s:%s:%s",
+							   StringUtils::to_string_leftpad(hh, 2).c_str(),
+							   StringUtils::to_string_leftpad(mm, 2).c_str(),
+							   StringUtils::to_string_leftpad(ss, 2).c_str());
+}
+
+rational Timecode::snap_time_to_timebase(const rational &time,
+										 const rational &timebase,
+										 Rounding floor)
+{
+	// Just convert to a timestamp in timebase units and back
+	int64_t timestamp = time_to_timestamp(time, timebase, floor);
+
+	return timestamp_to_time(timestamp, timebase);
+}
+
+rational Timecode::timestamp_to_time(const int64_t &timestamp,
+									 const rational &timebase)
+{
+	int64_t num = int64_t(timebase.numerator()) * timestamp;
+	int64_t den = timebase.denominator();
+
+	int num_r, den_r;
+
+	av_reduce(&num_r, &den_r, num, den, INT_MAX);
+
+	return rational(num_r, den_r);
+}
+
+bool Timecode::timebase_is_drop_frame(const rational &timebase)
+{
+	return (timebase.numerator() != 1);
+}
+
+int64_t Timecode::time_to_timestamp(const rational &time,
+									const rational &timebase, Rounding floor)
+{
+	return time_to_timestamp(time.toDouble(), timebase, floor);
+}
+
+int64_t Timecode::time_to_timestamp(const double &time,
+									const rational &timebase, Rounding floor)
+{
+	const double d = time * timebase.flipped().toDouble();
+
+	if (std::isnan(d)) {
+		return 0;
+	}
+
+	const double eps = 0.000000000001;
+
+	switch (floor) {
+	case kRound:
+	default:
+		return std::llround(d);
+	case kFloor:
+		if (d > std::ceil(d) - eps) {
+			return std::ceil(d);
+		} else {
+			return std::floor(d);
+		}
+	case kCeil:
+		if (d < std::floor(d) + eps) {
+			return std::floor(d);
+		} else {
+			return std::ceil(d);
+		}
+	}
+}
+
+int64_t Timecode::rescale_timestamp(const int64_t &ts, const rational &source,
+									const rational &dest)
+{
+	if (source == dest) {
+		return ts;
+	}
+
+	return av_rescale_q(ts, source.toAVRational(), dest.toAVRational());
+}
+
+int64_t Timecode::rescale_timestamp_ceil(const int64_t &ts,
+										 const rational &source,
+										 const rational &dest)
+{
+	if (source == dest) {
+		return ts;
+	}
+
+	return av_rescale_q_rnd(ts, source.toAVRational(), dest.toAVRational(),
+							AV_ROUND_UP);
+}
+
+}

core/src/util/timerange.cpp

@@ -0,0 +1,398 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "util/timerange.h"
+
+#include <algorithm>
+#include <cmath>
+#include <utility>
+
+#include "util/timecodefunctions.h"
+
+namespace olive::core
+{
+
+TimeRange::TimeRange(const rational &in, const rational &out)
+	: in_(in)
+	, out_(out)
+{
+	normalize();
+}
+
+const rational &TimeRange::in() const
+{
+	return in_;
+}
+
+const rational &TimeRange::out() const
+{
+	return out_;
+}
+
+const rational &TimeRange::length() const
+{
+	return length_;
+}
+
+void TimeRange::set_in(const rational &in)
+{
+	in_ = in;
+	normalize();
+}
+
+void TimeRange::set_out(const rational &out)
+{
+	out_ = out;
+	normalize();
+}
+
+void TimeRange::set_range(const rational &in, const rational &out)
+{
+	in_ = in;
+	out_ = out;
+	normalize();
+}
+
+bool TimeRange::operator==(const TimeRange &r) const
+{
+	return in() == r.in() && out() == r.out();
+}
+
+bool TimeRange::operator!=(const TimeRange &r) const
+{
+	return in() != r.in() || out() != r.out();
+}
+
+bool TimeRange::OverlapsWith(const TimeRange &a, bool in_inclusive,
+							 bool out_inclusive) const
+{
+	bool doesnt_overlap_in = (in_inclusive) ? (a.out() < in()) :
+											  (a.out() <= in());
+
+	bool doesnt_overlap_out = (out_inclusive) ? (a.in() > out()) :
+												(a.in() >= out());
+
+	return !doesnt_overlap_in && !doesnt_overlap_out;
+}
+
+TimeRange TimeRange::Combined(const TimeRange &a) const
+{
+	return Combine(a, *this);
+}
+
+bool TimeRange::Contains(const TimeRange &compare, bool in_inclusive,
+						 bool out_inclusive) const
+{
+	bool contains_in = (in_inclusive) ? (compare.in() >= in()) :
+										(compare.in() > in());
+
+	bool contains_out = (out_inclusive) ? (compare.out() <= out()) :
+										  (compare.out() < out());
+
+	return contains_in && contains_out;
+}
+
+bool TimeRange::Contains(const rational &r) const
+{
+	return r >= in_ && r < out_;
+}
+
+TimeRange TimeRange::Combine(const TimeRange &a, const TimeRange &b)
+{
+	return TimeRange(std::min(a.in(), b.in()), std::max(a.out(), b.out()));
+}
+
+TimeRange TimeRange::Intersected(const TimeRange &a) const
+{
+	return Intersect(a, *this);
+}
+
+TimeRange TimeRange::Intersect(const TimeRange &a, const TimeRange &b)
+{
+	return TimeRange(std::max(a.in(), b.in()), std::min(a.out(), b.out()));
+}
+
+TimeRange TimeRange::operator+(const rational &rhs) const
+{
+	TimeRange answer(*this);
+	answer += rhs;
+	return answer;
+}
+
+TimeRange TimeRange::operator-(const rational &rhs) const
+{
+	TimeRange answer(*this);
+	answer -= rhs;
+	return answer;
+}
+
+const TimeRange &TimeRange::operator+=(const rational &rhs)
+{
+	set_range(in_ + rhs, out_ + rhs);
+
+	return *this;
+}
+
+const TimeRange &TimeRange::operator-=(const rational &rhs)
+{
+	set_range(in_ - rhs, out_ - rhs);
+
+	return *this;
+}
+
+std::list<TimeRange> TimeRange::Split(const int &chunk_size) const
+{
+	std::list<TimeRange> split_ranges;
+
+	int start_time =
+		std::floor(this->in().toDouble() / static_cast<double>(chunk_size)) *
+		chunk_size;
+	int end_time =
+		std::ceil(this->out().toDouble() / static_cast<double>(chunk_size)) *
+		chunk_size;
+
+	for (int i = start_time; i < end_time; i += chunk_size) {
+		split_ranges.push_back(
+			TimeRange(std::max(this->in(), rational(i)),
+					  std::min(this->out(), rational(i + chunk_size))));
+	}
+
+	return split_ranges;
+}
+
+void TimeRange::normalize()
+{
+	// If `out` is earlier than `in`, swap them
+	if (out_ < in_) {
+		std::swap(out_, in_);
+	}
+
+	// Calculate length
+	if (out_ == RATIONAL_MIN || out_ == RATIONAL_MAX || in_ == RATIONAL_MIN ||
+		in_ == RATIONAL_MAX) {
+		length_ = rational::NaN;
+	} else {
+		length_ = out_ - in_;
+	}
+}
+
+void TimeRangeList::insert(const TimeRangeList &list_to_add)
+{
+	for (auto it = list_to_add.cbegin(); it != list_to_add.cend(); it++) {
+		insert(*it);
+	}
+}
+
+void TimeRangeList::insert(TimeRange range_to_add)
+{
+	// See if list contains this range
+	if (contains(range_to_add)) {
+		return;
+	}
+
+	// Does not contain range, so we'll almost certainly be adding it in some way
+	for (auto it = array_.begin(); it != array_.end();) {
+		const TimeRange &compare = *it;
+
+		if (compare.OverlapsWith(range_to_add)) {
+			range_to_add = TimeRange::Combine(range_to_add, compare);
+			it = array_.erase(it);
+		} else {
+			it++;
+		}
+	}
+
+	array_.push_back(range_to_add);
+}
+
+void TimeRangeList::remove(const TimeRange &remove)
+{
+	util_remove(&array_, remove);
+}
+
+void TimeRangeList::remove(const TimeRangeList &list)
+{
+	for (const TimeRange &r : list) {
+		remove(r);
+	}
+}
+
+bool TimeRangeList::contains(const TimeRange &range, bool in_inclusive,
+							 bool out_inclusive) const
+{
+	for (int i = 0; i < size(); i++) {
+		if (array_.at(i).Contains(range, in_inclusive, out_inclusive)) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+void TimeRangeList::shift(const rational &diff)
+{
+	for (int i = 0; i < array_.size(); i++) {
+		array_[i] += diff;
+	}
+}
+
+void TimeRangeList::trim_in(const rational &diff)
+{
+	// Re-do list since we want to handle overlaps
+	TimeRangeList temp = *this;
+
+	clear();
+
+	for (auto it = temp.array_.begin(); it != temp.array_.end(); it++) {
+		TimeRange &r = *it;
+		r.set_in(r.in() + diff);
+		insert(r);
+	}
+}
+
+void TimeRangeList::trim_out(const rational &diff)
+{
+	// Re-do list since we want to handle overlaps
+	TimeRangeList temp = *this;
+
+	clear();
+
+	for (auto it = temp.array_.begin(); it != temp.array_.end(); it++) {
+		TimeRange &r = *it;
+		r.set_out(r.out() + diff);
+		insert(r);
+	}
+}
+
+TimeRangeList TimeRangeList::Intersects(const TimeRange &range) const
+{
+	TimeRangeList intersect_list;
+
+	for (int i = 0; i < size(); i++) {
+		const TimeRange &compare = array_.at(i);
+
+		if (compare.out() <= range.in() || compare.in() >= range.out()) {
+			// No intersect
+			continue;
+		} else {
+			// Crop the time range to the range and add it to the list
+			TimeRange cropped(std::max(range.in(), compare.in()),
+							  std::min(range.out(), compare.out()));
+
+			intersect_list.insert(cropped);
+		}
+	}
+
+	return intersect_list;
+}
+
+TimeRangeListFrameIterator::TimeRangeListFrameIterator()
+	: TimeRangeListFrameIterator(TimeRangeList(), rational::NaN)
+{
+}
+
+TimeRangeListFrameIterator::TimeRangeListFrameIterator(
+	const TimeRangeList &list, const rational &timebase)
+	: list_(list)
+	, timebase_(timebase)
+	, range_index_(-1)
+	, size_(-1)
+	, frame_index_(0)
+	, custom_range_(false)
+{
+	if (!list_.isEmpty() && timebase_.isNull()) {
+		std::cerr
+			<< "TimeRangeListFrameIterator created with null timebase but non-empty list, this will likely lead to infinite loops"
+			<< std::endl;
+	}
+
+	UpdateIndexIfNecessary();
+}
+
+rational TimeRangeListFrameIterator::Snap(const rational &r) const
+{
+	return Timecode::snap_time_to_timebase(r, timebase_, Timecode::kFloor);
+}
+
+bool TimeRangeListFrameIterator::GetNext(rational *out)
+{
+	if (!HasNext()) {
+		return false;
+	}
+
+	// Output current value
+	*out = current_;
+
+	// Determine next value by adding timebase
+	current_ += timebase_;
+
+	// If this time is outside the current range, jump to the next one
+	UpdateIndexIfNecessary();
+
+	// Increment frame index
+	frame_index_++;
+
+	return true;
+}
+
+bool TimeRangeListFrameIterator::HasNext() const
+{
+	return range_index_ < list_.size();
+}
+
+int TimeRangeListFrameIterator::size()
+{
+	if (size_ == -1) {
+		// Size isn't calculated automatically for optimization, so we'll calculate it now
+		size_ = 0;
+
+		for (const TimeRange &range : list_) {
+			rational start = Snap(range.in());
+			rational end = Timecode::snap_time_to_timebase(
+				range.out(), timebase_, Timecode::kFloor);
+
+			if (end == range.out()) {
+				end -= timebase_;
+			}
+
+			int64_t start_ts = Timecode::time_to_timestamp(start, timebase_);
+			int64_t end_ts = Timecode::time_to_timestamp(end, timebase_);
+
+			size_ += 1 + (end_ts - start_ts);
+		}
+	}
+
+	return size_;
+}
+
+void TimeRangeListFrameIterator::UpdateIndexIfNecessary()
+{
+	while (range_index_ < list_.size() &&
+		   (range_index_ == -1 || current_ >= list_.at(range_index_).out())) {
+		range_index_++;
+
+		if (range_index_ < list_.size()) {
+			current_ = Snap(list_.at(range_index_).in());
+		}
+	}
+}
+
+}

core/src/util/value.cpp

@@ -0,0 +1,27 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "util/value.h"
+
+namespace olive::core
+{
+
+}

core/tests/rational-test.cpp

@@ -0,0 +1,109 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include <cstring>
+
+#include "util/rational.h"
+#include "util/tests.h"
+
+using namespace olive::core;
+
+bool rational_to_from_string_test()
+{
+	rational r(1, 30);
+
+	std::string s = r.toString();
+
+	rational r2 = rational::fromString(s);
+
+	return r == r2;
+}
+
+bool rational_to_from_string_test2()
+{
+	rational r(69, 420);
+
+	std::string s = r.toString();
+
+	rational r2 = rational::fromString(s);
+
+	return r == r2;
+}
+
+bool rational_defaults()
+{
+	// By default, rationals are valid 0/1
+	rational basic_constructor;
+
+	if (!basic_constructor.isNull()) {
+		return false;
+	}
+
+	if (basic_constructor.isNaN()) {
+		return false;
+	}
+
+	return true;
+}
+
+bool rational_nan()
+{
+	// Create a NaN with a 0 denominator
+	rational nan = rational(0, 0);
+	if (!nan.isNaN())
+		return false;
+	if (!nan.isNull())
+		return false;
+
+	// Create a non-NaN with a zero numerator
+	rational zero_nonnan(0, 999);
+	if (!zero_nonnan.isNull())
+		return false;
+	if (zero_nonnan.isNaN())
+		return false;
+
+	// Create a non-NaN with a non-zero numerator
+	rational nonzer_nonnan(1, 30);
+	if (nonzer_nonnan.isNull())
+		return false;
+	if (nonzer_nonnan.isNaN())
+		return false;
+
+	return true;
+}
+
+bool rational_nan_constant()
+{
+	return rational::NaN.isNaN();
+}
+
+int main()
+{
+	Tester t;
+
+	t.add("rational::defaults", rational_defaults);
+	t.add("rational::NaN", rational_nan);
+	t.add("rational::NaN_constant", rational_nan_constant);
+	t.add("rational::toString/fromString", rational_to_from_string_test);
+	t.add("rational::toString/fromString2", rational_to_from_string_test2);
+
+	return t.exec();
+}

core/tests/stringutils-test.cpp

@@ -0,0 +1,47 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include <cstring>
+
+#include "util/stringutils.h"
+#include "util/tests.h"
+
+using namespace olive::core;
+
+bool stringutils_format_test()
+{
+	const char *expected = "Hello, world!";
+	std::string f = StringUtils::format("%s, %s!", "Hello", "world");
+	if (strcmp(f.c_str(), expected) != 0) {
+		return false;
+	}
+
+	return true;
+}
+
+int main()
+{
+	Tester t;
+
+	t.add("StringUtils::format", stringutils_format_test);
+
+	return t.exec();
+}

core/tests/timecode-test.cpp

@@ -0,0 +1,65 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include <cstring>
+
+#include "util/timecodefunctions.h"
+#include "util/tests.h"
+
+using namespace olive::core;
+
+bool timecodefunctions_time_to_timecode_test()
+{
+	rational drop_frame_30(1001, 30000);
+
+	std::string timecode = Timecode::time_to_timecode(
+		rational(1), drop_frame_30, Timecode::kTimecodeDropFrame);
+	if (strcmp(timecode.c_str(), "00:00:01;00") != 0) {
+		return false;
+	}
+
+	return true;
+}
+
+bool timecodefunctions_time_to_timecode_test2()
+{
+	rational bizarre_timebase(156632219);
+
+	std::string timecode = Timecode::time_to_timecode(
+		rational(0), bizarre_timebase, Timecode::kTimecodeDropFrame);
+	if (strcmp(timecode.c_str(), "INVALID TIMEBASE") != 0) {
+		return false;
+	}
+
+	return true;
+}
+
+int main()
+{
+	Tester t;
+
+	t.add("Timecode::time_to_timecode",
+		  timecodefunctions_time_to_timecode_test);
+	t.add("Timecode::time_to_timecode2",
+		  timecodefunctions_time_to_timecode_test2);
+
+	return t.exec();
+}

core/tests/timerange-test.cpp

@@ -0,0 +1,124 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2023 Olive Studios LLC
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include <cstring>
+
+#include "util/timerange.h"
+#include "util/tests.h"
+
+using namespace olive::core;
+
+bool timerangelist_remove_test()
+{
+	TimeRangeList t;
+
+	t.insert(TimeRange(0, 30));
+	t.remove(TimeRange(2, 5));
+
+	return true;
+}
+
+bool timerangelist_mergeadjacent_test()
+{
+	TimeRangeList t;
+
+	// TimeRangeList should merge 1 and 3 together since they're adjacent
+	t.insert(TimeRange(0, 6));
+	t.insert(TimeRange(20, 30));
+	t.insert(TimeRange(6, 10));
+
+	if (!(t.size() == 2)) {
+		return false;
+	}
+	if (!(t.first() == TimeRange(20, 30))) {
+		return false;
+	}
+	if (!(t.at(1) == TimeRange(0, 10))) {
+		return false;
+	}
+
+	// TimeRangeList should ignore these because it's already contained
+	TimeRangeList noop_test = t;
+
+	noop_test.insert(TimeRange(4, 7));
+	if (!(noop_test == t)) {
+		return false;
+	}
+
+	noop_test.insert(TimeRange(0, 3));
+	if (!(noop_test == t)) {
+		return false;
+	}
+
+	noop_test.insert(TimeRange(25, 30));
+	if (!(noop_test == t)) {
+		return false;
+	}
+
+	// TimeRangeList should combine all these together
+	TimeRangeList combine_test_no_overlap = t;
+	combine_test_no_overlap.insert(TimeRange(10, 20));
+	if (!(combine_test_no_overlap.size() == 1)) {
+		return false;
+	}
+	if (!(combine_test_no_overlap.first() == TimeRange(0, 30))) {
+		return false;
+	}
+
+	TimeRangeList combine_test_in_overlap = t;
+	combine_test_in_overlap.insert(TimeRange(9, 20));
+	if (!(combine_test_in_overlap.size() == 1)) {
+		return false;
+	}
+	if (!(combine_test_in_overlap.first() == TimeRange(0, 30))) {
+		return false;
+	}
+
+	TimeRangeList combine_test_out_overlap = t;
+	combine_test_out_overlap.insert(TimeRange(10, 21));
+	if (!(combine_test_out_overlap.size() == 1)) {
+		return false;
+	}
+	if (!(combine_test_out_overlap.first() == TimeRange(0, 30))) {
+		return false;
+	}
+
+	TimeRangeList combine_test_both_overlap = t;
+	combine_test_both_overlap.insert(TimeRange(9, 21));
+	if (!(combine_test_both_overlap.size() == 1)) {
+		return false;
+	}
+	if (!(combine_test_both_overlap.first() == TimeRange(0, 30))) {
+		return false;
+	}
+
+	return true;
+}
+
+int main()
+{
+	Tester t;
+
+	t.add("TimeRangeList::remove", timerangelist_remove_test);
+	t.add("TimeRangeList::merge_adjacent", timerangelist_mergeadjacent_test);
+
+	return t.exec();
+}

ext/CMakeLists.txt

@@ -1,24 +0,0 @@
-# Olive - Non-Linear Video Editor
-# Copyright (C) 2023 Olive Studios LLC
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-add_subdirectory(core EXCLUDE_FROM_ALL)
-
-set(KDDockWidgets_STATIC ON CACHE INTERNAL "Force KDDockWidgets to build statically")
-set(KDDockWidgets_QT6 ${BUILD_QT6} CACHE INTERNAL "Conform KDDockWidgets' Qt 6 setting to ours")
-# Oak only uses the QtWidgets frontend; building the QtQuick frontend causes
-# duplicate QML module registration on macOS and pulls in unused dependencies.
-set(KDDockWidgets_FRONTENDS "qtwidgets" CACHE INTERNAL "Only build the QtWidgets frontend for Oak")
-add_subdirectory(KDDockWidgets EXCLUDE_FROM_ALL)