Motown: Convert MediaSink to expose MediaTimelineControlSite

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/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) {
+                     const std::string& input_file_name) {
   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();
 }
 
@@ skipping 15 matching lines @@
 }
 
 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;
-
     if (status->timeline_transform) {
       timeline_function_ = status->timeline_transform.To<TimelineFunction>();
     }
 
+    previous_state_ = state_;
+    if (status->end_of_stream) {
+      state_ = State::kEnded;
+    } else if (timeline_function_.subject_delta() == 0) {
+      state_ = State::kPaused;
+    } else {
+      state_ = State::kPlaying;
+    }
+
     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