Mojom updates for Motown.

mojo/services/media/common/interfaces/rate_control.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;
 
 // TimelineQuad
+// TODO(dalesat): Rename reference -> presentation.
+// TODO(dalesat): Rename target -> reference.
 //
 // A structure which holds the four numbers needed to define a linear
 // relationship between the points in two different timelines.  The relationship
 // is expressed using 4 integers in order to facilitate compositions of multiple
 // transformations (A->B can be composed with B->C to produce the transformation
 // from A->C), and to minimize rounding and scaling errors when mapping points
 // between timelines which do not have an integer scaling relationship between
 // each other.
 //
 // These values are used to define the following functions which map from
@@ skipping 13 matching lines @@
 // mojo/services/media/common/linear_transform.h
 //
 struct TimelineQuad {
   int64  reference_offset = 0;
   int64  target_offset    = 0;
   int32  reference_delta  = 0;
   uint32 target_delta     = 1;
 };
 
 // TimelineTransform
+// TODO(dalesat): Rename reference -> presentation.
+// TODO(dalesat): Rename target -> reference.
 //
 // A structure which holds both a timeline quad, and a pair of identifiers which
 // define the specific timelines which are the reference and target timelines.
 struct TimelineTransform {
   // TODO: These constants should probably defined by a central time management
   // service, not here.
   const uint32 kLocalTimeID = 0xFFFFFFFF;
   const uint32 kContextual  = 0xFFFFFFFE;
 
   TimelineQuad quad;
@@ skipping 35 matching lines @@
                          int64 reference_time);
 
   // Schedule a first order continuous rate change at the specified target time.
   SetRateAtTargetTime(int32 reference_delta,
                       uint32 target_delta,
                       int64 target_time);
 
   // Cancel any pending rate changes
   CancelPendingChanges();
 };