Video playback with mpv

Add video playback with mpv

• Add the mpv widget
• Enable the widget only for video able documents
• Control the widget with a small set of buttons
• Seek mpv with slider that indicates the current position in the video
• Use std::chrono in the MpvControls to be sure to have the correct time unit...

Not mpv related changes

• Don't del and add docks if they are already present, just swap the contained widget => don't reset the position of the dock at sub-document updates

What it does not for now :

• Get rid of controls on MPV view when the dock goes fullscreen

CMakeLists.txt

@@ -20,6 +20,10 @@ set(THREADS_PREFER_PTHREAD_FLAG ON)
 find_package(QT NAMES Qt6 Qt5      COMPONENTS Widgets REQUIRED)
 find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Widgets REQUIRED)
 
+if(WIN32)
+    message("You are building on windows, take attenion to the dependencies")
+endif()
+
 # Find others dependencies
 find_library(AVCODEC_LIBRARY    avcodec     4.0 REQUIRED)
 find_library(AVUTIL_LIBRARY     avutil      4.0 REQUIRED)
@@ -28,7 +32,10 @@ find_library(AVFORMAT_LIBRARY   avformat        REQUIRED)
 find_library(MPV_LIBRARY        mpv             REQUIRED)
 
 # Add the lua dependency
-add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/vendor/lua-5.4.3" "${CMAKE_BINARY_DIR}/vendor/lua-5.4.3")
+add_subdirectory(
+    "${CMAKE_CURRENT_SOURCE_DIR}/vendor/lua-5.4.3"
+    "${CMAKE_BINARY_DIR}/vendor/lua-5.4.3"
+)
 
 # Grab all files
 file(GLOB_RECURSE Vivy_SRC CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/src/*.cc")