Implement MediaSession on top of the WebMediaPlayerDelegate.

media/blink/webmediaplayer_impl.cc

 // Copyright 2013 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 "media/blink/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <string>
@@ skipping 195 matching lines @@
       params.audio_renderer_sink().get()
           ? params.audio_renderer_sink()
           : new NullAudioSink(media_task_runner_));
 }
 
 WebMediaPlayerImpl::~WebMediaPlayerImpl() {
   client_->setWebLayer(NULL);
 
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
-  if (delegate_) {
-    delegate_->RemoveObserver(this);
+  if (delegate_)
     delegate_->PlayerGone(this);
-  }
 
   // Abort any pending IO so stopping the pipeline doesn't get blocked.
   if (data_source_)
     data_source_->Abort();
   if (chunk_demuxer_) {
     chunk_demuxer_->Shutdown();
     chunk_demuxer_ = NULL;
   }
 
   renderer_factory_.reset();
@@ skipping 880 matching lines @@
   }
 
   // We may not be suspended if we were not yet subscribed or the pipeline was
   // not yet started when OnHidden() fired.
   if (!suspended_)
     return;
 
   Resume();
 }
 
+void WebMediaPlayerImpl::OnPlay() {
+  play();
+  client_->playbackStateChanged();
+}
+
+void WebMediaPlayerImpl::OnPause() {
+  pause();
+  client_->playbackStateChanged();
+}
+
 void WebMediaPlayerImpl::Resume() {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   CHECK(suspended_);
   CHECK(!resuming_);
 
   // If there was a time change pending when we suspended (which can happen when
   // we suspend immediately after a seek), surface it after resuming.
   bool time_changed = pending_time_change_;
   pending_time_change_ = false;
 
@@ skipping 194 matching lines @@
 
   // pause() may be called after playback has ended and the HTMLMediaElement
   // requires that currentTime() == duration() after ending.  We want to ensure
   // |paused_time_| matches currentTime() in this case or a future seek() may
   // incorrectly discard what it thinks is a seek to the existing time.
   paused_time_ =
       ended_ ? pipeline_.GetMediaDuration() : pipeline_.GetMediaTime();
 }
 
 void WebMediaPlayerImpl::NotifyPlaybackStarted() {
-  if (delegate_)
-    delegate_->DidPlay(this);
+  if (delegate_) {
+    delegate_->DidPlay(this, hasVideo(), hasAudio(), false,
+                       pipeline_.GetMediaDuration());
+  }
   if (!memory_usage_reporting_timer_.IsRunning()) {
     memory_usage_reporting_timer_.Start(FROM_HERE,
                                         base::TimeDelta::FromSeconds(2), this,
                                         &WebMediaPlayerImpl::ReportMemoryUsage);
   }
 }
 
 void WebMediaPlayerImpl::NotifyPlaybackPaused() {
   if (delegate_)
-    delegate_->DidPause(this);
+    delegate_->DidPause(this, ended_);
   memory_usage_reporting_timer_.Stop();
   ReportMemoryUsage();
 }
 
 void WebMediaPlayerImpl::ReportMemoryUsage() {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   // About base::Unretained() usage below: We destroy |demuxer_| on the main
   // thread.  Before that, however, ~WebMediaPlayerImpl() posts a task to the
   // media thread and waits for it to finish.  Hence, the GetMemoryUsage() task
@@ skipping 22 matching lines @@
            << ", Video: " << stats.video_memory_usage << ", DataSource: "
            << (data_source_ ? data_source_->GetMemoryUsage() : 0)
            << ", Demuxer: " << demuxer_memory_usage;
 
   const int64_t delta = current_memory_usage - last_reported_memory_usage_;
   last_reported_memory_usage_ = current_memory_usage;
   adjust_allocated_memory_cb_.Run(delta);
 }
 
 }  // namespace media