Bug 777696: Fix gstreamer backend on big endian architectures. r=doublec

content/media/gstreamer/nsGStreamerReader.cpp

@@ -132,10 +132,18 @@ nsresult nsGStreamerReader::Init(nsBuiltinDecoderReader* aCloneDonor)
   mAudioSink = gst_parse_bin_from_description("capsfilter name=filter ! "
 #ifdef MOZ_SAMPLE_TYPE_FLOAT32
         "appsink name=audiosink sync=true caps=audio/x-raw-float,"
+#ifdef IS_LITTLE_ENDIAN
         "channels={1,2},rate=44100,width=32,endianness=1234", TRUE, NULL);
+#else
+        "channels={1,2},rate=44100,width=32,endianness=4321", TRUE, NULL);
+#endif
 #else
         "appsink name=audiosink sync=true caps=audio/x-raw-int,"
+#ifdef IS_LITTLE_ENDIAN
         "channels={1,2},rate=48000,width=16,endianness=1234", TRUE, NULL);
+#else
+        "channels={1,2},rate=48000,width=16,endianness=4321", TRUE, NULL);
+#endif
 #endif
   mAudioAppSink = GST_APP_SINK(gst_bin_get_by_name(GST_BIN(mAudioSink),
         "audiosink"));