Motown: Framework parts for mojo transport (producer/consumer/mediapipe) and control (audiotrack).

mojo/services/media/common/interfaces/media_transport.mojom

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [DartPackage="mojo_services"]
 module mojo.media;
 
 import "mojo/services/media/common/interfaces/media_common.mojom";
 import "mojo/services/media/common/interfaces/media_pipe.mojom";
 import "mojo/services/media/common/interfaces/media_types.mojom";
@@ skipping 47 matching lines @@
 // In the latter scenario, the client calls Connect on the producer to connect
 // producer and consumer. The producer then calls PushPacket on the consumer to
 // deliver packets.
 interface MediaConsumer {
   // Sets the shared buffer in which packet payload will be located.
   SetBuffer(handle<shared_buffer> buffer, uint64 size) => ();
 
   // Pushes a packet to the consumer. The callback signals that the consumer
   // is done with the packet buffer region.
   PushPacket(MediaPacket packet) => ();
+
+  // Flushes the stream. The callback signals that the flush operation is
+  // complete.
+  Flush() => ();
 };