Motown: Use new TimelineTransform and related definitions

examples/media_test/media_test.cc

 // 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.
 
 #include "examples/media_test/media_test.h"
 #include "mojo/public/cpp/application/connect.h"
-#include "mojo/services/media/common/cpp/linear_transform.h"
-#include "mojo/services/media/common/cpp/local_time.h"
+#include "mojo/services/media/common/cpp/timeline.h"
+#include "mojo/services/media/common/cpp/timeline_function.h"
 #include "mojo/services/media/control/interfaces/media_factory.mojom.h"
 
 namespace mojo {
 namespace media {
 namespace examples {
 
 // static
 std::unique_ptr<MediaTest> MediaTest::Create(
     mojo::ApplicationImpl* app,
     const std::string& input_file_name) {
   return std::unique_ptr<MediaTest>(new MediaTest(app, input_file_name));
 }
 
 MediaTest::MediaTest(mojo::ApplicationImpl* app,
                      const std::string& input_file_name)
     : state_(MediaState::UNPREPARED) {
   MediaFactoryPtr factory;
   ConnectToService(app->shell(), "mojo:media_factory", GetProxy(&factory));
 
   SeekingReaderPtr reader;
   factory->CreateNetworkReader(input_file_name, GetProxy(&reader));
   factory->CreatePlayer(reader.Pass(), GetProxy(&media_player_));
 
   HandleStatusUpdates();
 }
 
 MediaTest::~MediaTest() {}
 
 int64_t MediaTest::position_ns() const {
-  // Apply the transform to the current time.
-  int64_t position;
-  transform_.DoForwardTransform(LocalClock::now().time_since_epoch().count(),
-                                &position);
+  // Apply the timeline function to the current time.
+  int64_t position = timeline_function_(Timeline::local_now());
 
   if (position < 0) {
     position = 0;
   }
 
   if (metadata_ && static_cast<uint64_t>(position) > metadata_->duration) {
     position = metadata_->duration;
   }
 
   return position;
 }
 
 const MediaMetadataPtr& MediaTest::metadata() const {
   return metadata_;
 }
 
 void MediaTest::HandleStatusUpdates(uint64_t version,
                                     MediaPlayerStatusPtr status) {
   if (status) {
     // Process status received from the player.
     previous_state_ = state_;
     state_ = status->state;
 
-    // Create a linear transform that translates local time to presentation
-    // time. Note that 'reference' here refers to the presentation time, and
-    // 'target' refers to the local time.
     if (status->timeline_transform) {
-      transform_ =
-          LinearTransform(status->timeline_transform->quad->target_offset,
-                          status->timeline_transform->quad->reference_delta,
-                          status->timeline_transform->quad->target_delta,
-                          status->timeline_transform->quad->reference_offset);
+      timeline_function_ = status->timeline_transform.To<TimelineFunction>();
     }
 
     metadata_ = status->metadata.Pass();
 
     if (update_callback_ != nullptr) {
       update_callback_();
     }
   }
 
   // Request a status update.
   media_player_->GetStatus(
       version, [this](uint64_t version, MediaPlayerStatusPtr status) {
         HandleStatusUpdates(version, status.Pass());
       });
 }
 
 }  // namespace examples
 }  // namespace media
 }  // namespace mojo