Add support for Meson as alternative/parallel build system

https://github.com/mesonbuild/meson

With contributions from:

Tim-Philipp Müller <tim@centricular.com>
Matej Knopp <matej.knopp@gmail.com>
Jussi Pakkanen <jpakkane@gmail.com> (original port)

Highlights of the features provided are:
* Faster builds on Linux (~40-50% faster)
* The ability to build with MSVC on Windows
* Generate Visual Studio project files
* Generate XCode project files
* Much faster builds on Windows (on-par with Linux)
* Seriously fast configure and building on embedded

... and many more. For more details see:

http://blog.nirbheek.in/2016/05/gstreamer-and-meson-new-hope.html
http://blog.nirbheek.in/2016/07/building-and-developing-gstreamer-using.html

Building with Meson should work on both Linux and Windows, but may
need a few more tweaks on other operating systems.

1 files changed, 33 insertions, 0 deletions

diff --git a/ext/openjpeg/meson.build b/ext/openjpeg/meson.build
new file mode 100644
index 000000000..d60974ce7
--- /dev/null
+++ b/ext/openjpeg/meson.build
@@ -0,0 +1,33 @@
+openjpeg_sources = [
+  'gstopenjpeg.c',
+  'gstopenjpegdec.c',
+  'gstopenjpegenc.c',
+]
+
+openjpeg_cargs = []
+
+# Check for 2.1, then 2.0
+openjpeg_dep = dependency('libopenjp2', version : '>=2.1', required : false)
+if openjpeg_dep.found()
+  openjpeg_cargs += ['-DHAVE_OPENJPEG_2_1']
+else
+  openjpeg_dep = dependency('libopenjp2', required : false)
+  # Fallback to 1.5
+  if not openjpeg_dep.found()
+    openjpeg_dep = dependency('libopenjpeg1', required : false)
+    openjpeg_cargs += ['-DHAVE_OPENJPEG_1']
+  endif
+endif
+
+if openjpeg_dep.found()
+  gstopenjpeg = library('gstopenjpeg',
+    openjpeg_sources,
+    c_args : gst_plugins_bad_args + openjpeg_cargs,
+    link_args : noseh_link_args,
+    include_directories : [configinc],
+    dependencies : [gst_dep, gstvideo_dep, openjpeg_dep,
+		    gstcodecparsers_dep],
+    install : true,
+    install_dir : plugins_install_dir,
+  )
+endif