build: add meson build support

Adds support for the meson build system as well as a bit of
documentation. Compatibility with the existing waf build is
maintained.

.gitignore

@@ -36,3 +36,5 @@
 
 /old_build
 /Makefile
+
+/subprojects

DOCS/build-system-differences.md

@@ -0,0 +1,70 @@
+# Differences Between Meson and Waf
+
+mpv currently supports two different build systems: waf and meson. In general,
+option names between both build systems are mostly the same. In most cases,
+``--enable-foo`` in waf becomes ``-Dfoo=enabled`` in meson. Likewise,
+``--disable-foo`` becomes ``-Dfoo=disabled``.  For the rest of this document,
+Waf options will be noted as ``--foo`` while meson options are noted as
+``foo``.
+
+## Universal Options
+
+Meson has several [universal options](https://mesonbuild.com/Builtin-options.html#universal-options)
+that you get for free. In some cases, these overlapped with custom waf options.
+
+* ``--libmpv-static`` and ``--libmpv-shared`` were combined into one option:
+  ``libmpv``. Use ``default_library`` to control if you want to build static or
+  shared libraries.
+* Waf had a boolean ``--optimize`` option. In meson, this is a universal option,
+  ``optimization``, which can take several different values. In mpv's meson
+  build, the default is ``2``.
+* Instead of ``--debug-build``, meson simply calls it ``debug``. It is enabled
+  by default.
+
+## Changed Options
+
+* The legacy lua names (``52``, ``52deb``, etc.) for ``--lua`` are not
+  supported in the meson build. Instead, pass the generic pkg-config values
+  such as ``lua52``, ``lua5.2``, etc.
+* ``--lgpl`` was changed to ``gpl``. If ``gpl`` is false, the build is LGPL2.1+.
+
+### Boolean Options
+
+The following options are all booleans that accept ``true`` or ``false``
+instead of ``enabled`` or ``disabled``.
+
+* ``build-date``
+* ``cplayer``
+* ``gpl``
+* ``libmpv``
+* ``ta-leak-report``
+* ``tests``
+
+## Removed Options
+
+There are options removed with no equivalent in the meson build.
+
+* ``--asm`` was removed since it doesn't do anything.
+* ``--android`` was removed since meson knows if the machine is android.
+* ``--clang-compilation-database`` was removed. Meson can do this on its own
+  by invoking ninja (``ninja -t compdb``).
+* ``--tvos`` was removed since it doesn't do anything.
+* ``--static-build`` was removed. Use ``default_library``.
+* ``--swift-static`` was removed. The swift library always dynamically links.
+
+## Renamed Options
+
+These are some other options that were renamed.
+
+* ``--gl-wayland`` was renamed to ``egl-wayland``.
+* ``--swift`` was renamed to ``swift-build``.
+
+## Other
+
+* The meson build supports passing the ``SOURCE_DATE_EPOCH`` environment variable
+during the compilation step for those who want reproducibility without having to
+disable the build date.
+* The ``Configuration`` line shown by ``mpv -v`` does not show everything passed on
+cli since meson does not have any easy way to access a user's argv. Instead, it
+simply shows whatever the value of ``prefix`` is regardless if it was specified
+or not.

README.md

@@ -73,11 +73,27 @@ Changes to the default key bindings are indicated in
 
 
 Compiling with full features requires development files for several
-external libraries. Below is a list of some important requirements.
+external libraries. One of the two build systems supported by mpv is required:
+[meson](https://mesonbuild.com/index.html) or [waf](https://waf.io/). Meson
+can be obtained from your distro or PyPI. Waf can be downloaded by using the
+`./bootstrap.py` script. It will get the lastest version of waf that was tested
+with mpv. Some documentation about the differences between the build systems are
+located in [build-system-differences][build-system-differences].
 
-The mpv build system uses [waf](https://waf.io/), but we don't store it in the
-repository. The `./bootstrap.py` script will download the latest version
-of waf that was tested with the build system.
+### Meson
+
+After creating your build directory (e.g. `meson build`), you can view a list
+of all the build options via `meson configure build`. You could also just simply
+look at the `meson_options.txt` file. Logs are stored in `meson-logs` within
+your build directory.
+
+Example:
+
+    meson build
+    meson compile -C build
+    meson install -C build
+
+### Waf
 
 For a list of the available build options use `./waf configure --help`. If
 you think you have support for some feature installed but configure fails to
@@ -214,3 +230,4 @@ Most activity happens on the IRC channel and the github issue tracker.
 [api-changes]: https://github.com/mpv-player/mpv/blob/master/DOCS/client-api-changes.rst
 [restore-old-bindings]: https://github.com/mpv-player/mpv/blob/master/etc/restore-old-bindings.conf
 [contribute.md]: https://github.com/mpv-player/mpv/blob/master/DOCS/contribute.md
+[build-system-differences]: https://github.com/mpv-player/mpv/blob/master/DOCS/build-system-differences.md

common/stats.c

@@ -69,7 +69,8 @@ struct stat_entry {
 // Overflows only after I'm dead.
 static int64_t get_thread_cpu_time_ns(pthread_t thread)
 {
-#if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0 && defined(_POSIX_THREAD_CPUTIME)
+#if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0 && defined(_POSIX_THREAD_CPUTIME) && \
+    !HAVE_WIN32_INTERNAL_PTHREADS
     clockid_t id;
     struct timespec tv;
     if (pthread_getcpuclockid(thread, &id) == 0 &&

generated/TOOLS/osxbundle/mpv.app/Contents/Resources/meson.build

@@ -0,0 +1,8 @@
+input = join_paths(source_root, 'TOOLS', 'osxbundle',
+                   'mpv.app', 'Contents', 'Resources', 'icon.icns')
+osxbundle = custom_target('osxbundle',
+    input: input,
+    output: 'icon.icns.inc',
+    command: [file2string, '@INPUT@', '@OUTPUT@'],
+)
+sources += osxbundle

generated/etc/meson.build

@@ -0,0 +1,20 @@
+icons = ['16', '32', '64', '128']
+foreach size: icons
+    name = 'mpv-icon-8bit-'+size+'x'+size+'.png'
+    icon = custom_target(name,
+        input: join_paths(source_root, 'etc', name),
+        output: name + '.inc',
+        command: [file2string, '@INPUT@', '@OUTPUT@'],
+    )
+    sources += icon
+endforeach
+
+etc_files = ['input.conf', 'builtin.conf']
+foreach file: etc_files
+    etc_file = custom_target(file,
+        input: join_paths(source_root, 'etc', file),
+        output: file + '.inc',
+        command: [file2string, '@INPUT@', '@OUTPUT@'],
+    )
+    sources += etc_file
+endforeach

generated/meson.build

@@ -0,0 +1,27 @@
+ebml_defs = custom_target('ebml_defs',
+    output: 'ebml_defs.inc',
+    command: [matroska, '--generate-definitions', '@OUTPUT@'],
+)
+
+ebml_types = custom_target('ebml_types',
+    output: 'ebml_types.h',
+    command: [matroska, '--generate-header', '@OUTPUT@'],
+)
+
+version_h = custom_target('version.h',
+    output: 'version.h',
+    command: [version_py, '@OUTPUT@'],
+    build_always_stale: true,
+)
+
+sources += [ebml_defs, ebml_types, version_h]
+
+# Meson doesn't allow having multiple build targets with the same name in the same file.
+# Just generate the com in here for windows builds.
+if win32 and get_option('cplayer')
+    features += 'win32-executable'
+    wrapper_flags = ['-municode', '-Wl,--subsystem,console']
+    wrapper_sources= '../osdep/win32-console-wrapper.c'
+    executable('mpv', wrapper_sources, c_args: wrapper_flags, link_args: wrapper_flags,
+               name_suffix: 'com', install: true)
+endif

generated/osdep/meson.build

@@ -0,0 +1,57 @@
+# custom swift targets
+bridge = join_paths(source_root, 'osdep/macOS_swift_bridge.h')
+header = join_paths(build_root, 'osdep/macOS_swift.h')
+module = join_paths(build_root, 'osdep/macOS_swift.swiftmodule')
+target = join_paths(build_root, 'osdep/macOS_swift.o')
+
+swift_flags = ['-frontend', '-c', '-sdk', macos_sdk_path,
+               '-enable-objc-interop', '-emit-objc-header', '-parse-as-library']
+
+if swift_ver.version_compare('>=6.0')
+    swift_flags += ['-swift-version', '5']
+endif
+
+if get_option('debug')
+    swift_flags += '-g'
+endif
+
+if get_option('optimization') != '0'
+    swift_flags += '-O'
+endif
+
+if macos_10_11_features.allowed()
+    swift_flags += ['-D', 'HAVE_MACOS_10_11_FEATURES']
+endif
+
+if macos_10_14_features.allowed()
+    swift_flags += ['-D', 'HAVE_MACOS_10_14_FEATURES']
+endif
+
+extra_flags = get_option('swift-flags').split()
+swift_flags += extra_flags
+
+swift_compile = [swift_prog, swift_flags, '-module-name', 'macOS_swift',
+                 '-emit-module-path', '@OUTPUT0@', '-import-objc-header', bridge,
+                 '-emit-objc-header-path', '@OUTPUT1@', '-o', '@OUTPUT2@',
+                 '@INPUT@', '-I.', '-I' + source_root]
+
+swift_targets = custom_target('swift_targets',
+    input: swift_sources,
+    output: ['macOS_swift.swiftmodule', 'macOS_swift.h', 'macOS_swift.o'],
+    command: swift_compile,
+)
+sources += swift_targets
+
+swift_lib_dir_py = find_program(join_paths(tools_directory, 'macos-swift-lib-directory.py'))
+swift_lib_dir = run_command(swift_lib_dir_py, swift_prog.full_path(), check: true).stdout()
+message('Detected Swift library directory: ' + swift_lib_dir)
+
+# linker flags
+swift_link_flags = ['-L' + swift_lib_dir, '-Xlinker', '-rpath',
+                    '-Xlinker', swift_lib_dir, '-rdynamic', '-Xlinker',
+                    '-add_ast_path', '-Xlinker', module]
+if swift_ver.version_compare('>=5.0')
+    swift_link_flags += ['-Xlinker', '-rpath', '-Xlinker',
+                         '/usr/lib/swift', '-L/usr/lib/swift']
+endif
+add_project_link_arguments(swift_link_flags, language: ['c', 'objc'])

generated/player/javascript/meson.build

@@ -0,0 +1,6 @@
+defaults_js = custom_target('defaults.js',
+    input: join_paths(source_root, 'player', 'javascript', 'defaults.js'),
+    output: 'defaults.js.inc',
+    command: [file2string, '@INPUT@', '@OUTPUT@'],
+)
+sources += defaults_js

generated/player/lua/meson.build

@@ -0,0 +1,10 @@
+lua_files = ['defaults.lua', 'assdraw.lua', 'options.lua', 'osc.lua',
+             'ytdl_hook.lua', 'stats.lua', 'console.lua', 'auto_profiles.lua']
+foreach file: lua_files
+    lua_file = custom_target(file,
+        input: join_paths(source_root, 'player', 'lua', file),
+        output: file + '.inc',
+        command: [file2string, '@INPUT@', '@OUTPUT@'],
+    )
+    sources += lua_file
+endforeach

generated/sub/meson.build

@@ -0,0 +1,6 @@
+osd_font = custom_target('osd_font.otf',
+    input: join_paths(source_root, 'sub', 'osd_font.otf'),
+    output: 'osd_font.otf.inc',
+    command: [file2string, '@INPUT@', '@OUTPUT@'],
+)
+sources += osd_font

generated/wayland/meson.build

@@ -0,0 +1,32 @@
+wl_protocol_dir = wayland['deps'][2].get_variable(pkgconfig: 'pkgdatadir')
+protocols = [[wl_protocol_dir, 'stable/xdg-shell/xdg-shell.xml'],
+             [wl_protocol_dir, 'stable/presentation-time/presentation-time.xml'],
+             [wl_protocol_dir, 'unstable/idle-inhibit/idle-inhibit-unstable-v1.xml'],
+             [wl_protocol_dir, 'unstable/xdg-decoration/xdg-decoration-unstable-v1.xml']]
+wl_protocols_source = []
+wl_protocols_headers = []
+
+foreach p: protocols
+    xml = join_paths(p)
+    wl_protocols_source += custom_target(xml.underscorify() + '_c',
+        input: xml,
+        output: '@BASENAME@.c',
+        command: [wayland['scanner'], 'private-code', '@INPUT@', '@OUTPUT@'],
+    )
+    wl_protocols_headers += custom_target(xml.underscorify() + '_h',
+        input: xml,
+        output: '@BASENAME@.h',
+        command: [wayland['scanner'], 'client-header', '@INPUT@', '@OUTPUT@'],
+    )
+endforeach
+
+lib_client_protocols = static_library('protocols',
+                                      wl_protocols_source + wl_protocols_headers,
+                                      dependencies: wayland['deps'][0])
+
+client_protocols = declare_dependency(link_with: lib_client_protocols,
+                                      sources: wl_protocols_headers)
+
+dependencies += [client_protocols, wayland['deps']]
+
+sources += ['video/out/wayland_common.c']