getUserMeida: report device starting states

media/capture/video/mac/video_capture_device_decklink_mac.mm

 // Copyright 2014 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/capture/video/mac/video_capture_device_decklink_mac.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 191 matching lines @@
           chosen_display_mode->GetDisplayMode(), bmdFormat8BitYUV,
           bmdVideoInputFlagDefault) != S_OK) {
     SendErrorString(FROM_HERE, "Could not select the video format we like.");
     return;
   }
 
   decklink_input_local->SetCallback(this);
   if (decklink_input_local->StartStreams() != S_OK)
     SendErrorString(FROM_HERE, "Could not start capturing");
 
+  if (frame_receiver_)
+    frame_receiver_->ReportStarted();
+
   decklink_.swap(decklink_local);
   decklink_input_.swap(decklink_input_local);
 }
 
 void DeckLinkCaptureDelegate::StopAndDeAllocate() {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (!decklink_input_.get())
     return;
   if (decklink_input_->StopStreams() != S_OK)
     SendLogString("Problem stopping capture.");
@@ skipping 265 matching lines @@
     client_->OnError(from_here, reason);
 }
 
 void VideoCaptureDeviceDeckLinkMac::SendLogString(const std::string& message) {
   DCHECK(thread_checker_.CalledOnValidThread());
   base::AutoLock lock(lock_);
   if (client_)
     client_->OnLog(message);
 }
 
+void VideoCaptureDeviceDeckLinkMac::ReportStarted() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  base::AutoLock lock(lock_);
+  if (client_)
+    client_->OnStarted();
+}
+
 void VideoCaptureDeviceDeckLinkMac::AllocateAndStart(
     const VideoCaptureParams& params,
     std::unique_ptr<VideoCaptureDevice::Client> client) {
   DCHECK(thread_checker_.CalledOnValidThread());
   client_ = std::move(client);
   if (decklink_capture_delegate_.get())
     decklink_capture_delegate_->AllocateAndStart(params);
 }
 
 void VideoCaptureDeviceDeckLinkMac::StopAndDeAllocate() {
   if (decklink_capture_delegate_.get())
     decklink_capture_delegate_->StopAndDeAllocate();
 }
 
 }  // namespace media