diff --git a/teavm-dom/src/main/java/org/teavm/dom/media/MediaSource.java b/teavm-dom/src/main/java/org/teavm/dom/media/MediaSource.java
new file mode 100644
index 000000000..7ab93fcd2
--- /dev/null
+++ b/teavm-dom/src/main/java/org/teavm/dom/media/MediaSource.java
@@ -0,0 +1,24 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package org.teavm.dom.media;
+
+import org.teavm.jso.JSObject;
+
+public interface MediaSource extends JSObject {
+    SourceBuffer addSourceBuffer(String type);
+    void endOfStream();
+}
diff --git a/teavm-dom/src/main/java/org/teavm/dom/media/SourceBuffer.java b/teavm-dom/src/main/java/org/teavm/dom/media/SourceBuffer.java
new file mode 100644
index 000000000..c588c3674
--- /dev/null
+++ b/teavm-dom/src/main/java/org/teavm/dom/media/SourceBuffer.java
@@ -0,0 +1,28 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package org.teavm.dom.media;
+
+import org.teavm.dom.typedarrays.Uint8Array;
+import org.teavm.jso.JSObject;
+import org.teavm.jso.JSProperty;
+
+public interface SourceBuffer extends JSObject {
+    void appendBuffer(Uint8Array array);
+    
+    @JSProperty
+    boolean getUpdating();
+}