Connect webrtc MediaSourceInterface ready states with webkit WebMediaStreamSource

content/renderer/media/media_stream_source_observer.cc

+// Copyright (c) 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 "content/renderer/media/media_stream_source_observer.h"
+
+#include "base/logging.h"
+
+namespace content {
+
+MediaStreamSourceObserver::MediaStreamSourceObserver(
+    webrtc::MediaSourceInterface* webrtc_source,
+    const WebKit::WebMediaStreamSource& webkit_source)
+     : state_(webrtc_source->state()),
+       webrtc_source_(webrtc_source),
+       webkit_source_(webkit_source) {
+  DCHECK(CalledOnValidThread());
+  webrtc_source_->RegisterObserver(this);
+}
+
+MediaStreamSourceObserver::~MediaStreamSourceObserver() {
+  if (webrtc_source_)
+    webrtc_source_->UnregisterObserver(this);
+}
+
+void MediaStreamSourceObserver::OnChanged() {
+  DCHECK(CalledOnValidThread());
+  // There should be no more notification after kEnded.
+  DCHECK(webrtc_source_ != NULL);
+

[tommi (sloooow) - chröme, 2013/04/23 09:50:55]

one empty line

+
+  webrtc::MediaSourceInterface::SourceState state = webrtc_source_->state();
+  if (state == state_)
+    return;
+  state_ = state;
+
+  switch (state) {
+    case webrtc::MediaSourceInterface::kInitializing:
+      /* kInitializing is not ready state. */

[perkj_chrome, 2013/04/18 13:36:20]

Can you rewrite this comment a bit. Ie kInitializing does not exist  as  a
WebKitSource::ReadyState.

[tommi (sloooow) - chröme, 2013/04/23 09:50:55]

This looks like copy/paste from another changelist, right?
Maybe you need to rebase?

+      break;
+    case webrtc::MediaSourceInterface::kLive:
+      webkit_source_.setReadyState(
+          WebKit::WebMediaStreamSource::ReadyStateLive);
+      break;
+    case webrtc::MediaSourceInterface::kMuted:
+      webkit_source_.setReadyState(
+          WebKit::WebMediaStreamSource::ReadyStateMuted);
+      break;
+    case webrtc::MediaSourceInterface::kEnded:
+      webkit_source_.setReadyState(
+          WebKit::WebMediaStreamSource::ReadyStateEnded);
+      webrtc_source_->UnregisterObserver(this);
+      webrtc_source_ = NULL;
+      webkit_source_.reset();
+      break;
+    default:
+      NOTREACHED();
+  }
+}
+
+}  // namespace content