adding cmake folder

cmake/FindLibmpv.cmake

@@ -0,0 +1,78 @@
+#
+# SPDX-FileCopyrightText: 2006 Laurent Montel <montel@kde.org>
+# SPDX-FileCopyrightText: 2019 Heiko Becker <heirecka@exherbo.org>
+# SPDX-FileCopyrightText: 2020 Elvis Angelaccio <elvis.angelaccio@kde.org>
+# SPDX-FileCopyrightText: 2021 George Florea Bănuș <georgefb899@gmail.com>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+#
+# FindLibmpv
+# ----------
+#
+# Find the mpv media player client library.
+#
+# Defines the following variables:
+#
+# - Libmpv_FOUND
+#     True if it finds the library and include directory
+#
+# - Libmpv_INCLUDE_DIRS
+#     The libmpv include dirs for use with target_include_directories
+#
+# - Libmpvb_LIBRARIES
+#     The libmpv libraries for use with target_link_libraries()
+#
+# - Libmpv_VERSION
+#     The version of the found libmpv
+#
+#
+# Defines the following imported target if 'Libmpv_FOUND' is true:
+#
+# - Libmpv::Libmpv
+#
+
+find_package(PkgConfig QUIET)
+
+pkg_search_module(PC_MPV QUIET mpv)
+
+find_path(Libmpv_INCLUDE_DIRS
+    NAMES client.h
+    PATH_SUFFIXES mpv
+    HINTS ${PC_MPV_INCLUDEDIR}
+)
+
+
+find_library(Libmpv_LIBRARIES
+    NAMES mpv
+    HINTS ${PC_MPV_LIBDIR}
+)
+
+set(Libmpv_VERSION ${PC_MPV_VERSION})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Libmpv
+    FOUND_VAR
+        Libmpv_FOUND
+    REQUIRED_VARS
+        Libmpv_LIBRARIES
+        Libmpv_INCLUDE_DIRS
+    VERSION_VAR
+        Libmpv_VERSION
+)
+
+if (Libmpv_FOUND AND NOT TARGET Libmpv::Libmpv)
+    add_library(Libmpv::Libmpv UNKNOWN IMPORTED)
+    set_target_properties(Libmpv::Libmpv PROPERTIES
+        IMPORTED_LOCATION "${Libmpv_LIBRARIES}"
+        INTERFACE_INCLUDE_DIRECTORIES "${Libmpv_INCLUDE_DIRS}"
+    )
+endif()
+
+mark_as_advanced(Libmpv_LIBRARIES Libmpv_INCLUDE_DIRS)
+
+include(FeatureSummary)
+set_package_properties(Libmpv PROPERTIES
+    URL "https://mpv.io"
+    DESCRIPTION "mpv media player client library"
+)