webrtcdsp: Add support to build with meson

ext/meson.build

@@ -62,7 +62,7 @@ subdir('voaacenc')
 #subdir('voamrwbenc')
 subdir('vulkan')
 subdir('wayland')
-#subdir('webrtcdsp')
+subdir('webrtcdsp')
 subdir('webp')
 subdir('x265')
 subdir('zbar')

ext/webrtcdsp/meson.build

@@ -0,0 +1,23 @@
+webrtc_sources = [
+  'gstwebrtcdsp.cpp',
+  'gstwebrtcechoprobe.cpp'
+]
+
+webrtc_dep = dependency('webrtc-audio-processing', version : '>= 0.2', required : false)
+webrtc_max_dep = dependency('webrtc-audio-processing', version : '>= 0.4', required : false)
+
+if (webrtc_max_dep.found())
+  message('WebRTC Audio Processing library is not API stable,'
+      + ' we cannot support newer version ' + webrtc_max_dep.version()
+      + ' (we only support 0.2 and 0.3)')
+elif (webrtc_dep.found())
+  gstwebrtcdsp = library('gstwebrtcdsp',
+    webrtc_sources,
+    cpp_args : gst_plugins_bad_args,
+    link_args : noseh_link_args,
+    include_directories : [configinc],
+    dependencies : [gstbase_dep, gstaudio_dep, webrtc_dep],
+    install : true,
+    install_dir : plugins_install_dir,
+  )
+endif