Bug 1314147 - Add --enable-av1 configure switch. r=froydnj

Build system switch for optional inclusion of libaom
for support of the Alliance for Open Media AV1 video
codec.

MozReview-Commit-ID: 2C4o1ogRS9v

--HG--
extra : rebase_source : d4a68f1fc4654895f62a905666f0b75726e20e7f

config/external/moz.build

@@ -33,6 +33,9 @@ if CONFIG['MOZ_WEBM_ENCODER']:
 if not CONFIG['MOZ_SYSTEM_LIBVPX']:
     external_dirs += ['media/libvpx']
 
+if CONFIG['MOZ_AV1']:
+    external_dirs += ['media/libaom']
+
 if not CONFIG['MOZ_SYSTEM_PNG']:
     external_dirs += ['media/libpng']
 

toolkit/moz.configure

@@ -405,6 +405,20 @@ set_config('MOZ_FFMPEG', ffmpeg)
 set_define('MOZ_FFMPEG', ffmpeg)
 imply_option('--enable-fmp4', ffmpeg, '--enable-ffmpeg')
 
+# Libaom AV1 Video Codec Support
+# ==============================================================
+option('--enable-av1',
+        help='Enable libaom for av1 video support')
+
+@depends('--enable-av1')
+def av1(value):
+    enabled = bool(value)
+    if enabled:
+        return True
+
+set_config('MOZ_AV1', av1)
+set_define('MOZ_AV1', av1)
+
 # Built-in fragmented MP4 support.
 # ==============================================================
 option('--disable-fmp4', env='MOZ_FMP4',