meson: Build mpeg2enc and mplex when available

ext/meson.build

@@ -26,8 +26,8 @@ subdir('libde265')
 subdir('libmms')
 #subdir('lv2')
 #subdir('modplug')
-#subdir('mpeg2enc')
+subdir('mpeg2enc')
-#subdir('mplex')
+subdir('mplex')
 #subdir('musepack')
 #subdir('neon')
 #subdir('ofa')

ext/mpeg2enc/meson.build

@@ -0,0 +1,19 @@
+if mjpegtools_dep.found()
+  mpeg2enc_dep = cxx.find_library('mpeg2encpp', required : false)
+
+  if mpeg2enc_dep.found()
+    gstmpeg2enc = library('gstmpeg2enc',
+      'gstmpeg2enc.cc',
+      'gstmpeg2encoptions.cc',
+      'gstmpeg2encoder.cc',
+      'gstmpeg2encstreamwriter.cc',
+      'gstmpeg2encpicturereader.cc',
+      cpp_args : gst_plugins_bad_args + ['-DGST_MJPEGTOOLS_API=' + mjpegtools_api],
+      link_args : noseh_link_args,
+      include_directories : [configinc],
+      dependencies : [gstvideo_dep, mjpegtools_dep, mpeg2enc_dep],
+      install : true,
+      install_dir : plugins_install_dir,
+    )
+  endif
+endif

ext/mplex/meson.build

@@ -0,0 +1,18 @@
+if mjpegtools_dep.found()
+  mplex2_dep = cxx.find_library('mplex2', required : false)
+
+  if mplex2_dep.found()
+    gstmplex2 = library('gstmplex2',
+      'gstmplex.cc',
+      'gstmplexibitstream.cc',
+      'gstmplexjob.cc',
+      'gstmplexoutputstream.cc',
+      cpp_args : gst_plugins_bad_args + ['-DGST_MJPEGTOOLS_API=' + mjpegtools_api],
+      link_args : noseh_link_args,
+      include_directories : [configinc],
+      dependencies : [gstaudio_dep, mjpegtools_dep, mplex2_dep],
+      install : true,
+      install_dir : plugins_install_dir,
+    )
+  endif
+endif

meson.build

@@ -302,9 +302,21 @@ glib_dep = dependency('glib-2.0', version : glib_req)
 gio_dep = dependency('gio-2.0', version : glib_req)
 gmodule_dep = dependency('gmodule-2.0', version : glib_req)
 x11_dep = dependency('x11', required : false)
+
 # Used by dtls and hls
 openssl_dep = dependency('openssl', version : '>= 1.0.1', required : false)
 
+# Used by mpeg2enc and mplex
+# mjpegtools upstream breaks API constantly and doesn't export the version in
+# a header anywhere. The configure file has a lot of logic to support old
+# versions, but it all seems untested and broken. Require 2.0.0. Can be changed
+# if someone complains.
+mjpegtools_dep = dependency('mjpegtools', version : '>=2.0.0', required : false)
+mjpegtools_api = '0'
+if mjpegtools_dep.found()
+  mjpegtools_api = '20000'
+endif
+
 if x11_dep.found()
   cdata.set('HAVE_X11', 1)
 endif