Video Capture: Allow suspension of individual devices.

content/browser/renderer_host/media/video_capture_host.cc

 // Copyright (c) 2012 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/browser/renderer_host/media/video_capture_host.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 219 matching lines @@
                                         VIDEO_CAPTURE_STATE_STOPPED));
   DeleteVideoCaptureController(controller_id, false);
 }
 
 void VideoCaptureHost::OnPauseCapture(int device_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DVLOG(1) << "VideoCaptureHost::OnPauseCapture, device_id " << device_id;
 
   VideoCaptureControllerID controller_id(device_id);
   EntryMap::iterator it = entries_.find(controller_id);
-  if (it == entries_.end())
+  if (it == entries_.end() || !it->second)
     return;
 
-  if (it->second) {
-    media_stream_manager_->video_capture_manager()->PauseCaptureForClient(
-        it->second.get(), controller_id, this);
-  }
+  media_stream_manager_->video_capture_manager()->PauseCaptureForClient(
+      it->second.get(), controller_id, this);
+  Send(new VideoCaptureMsg_StateChanged(device_id, VIDEO_CAPTURE_STATE_PAUSED));
 }
 
 void VideoCaptureHost::OnResumeCapture(
     int device_id,
     media::VideoCaptureSessionId session_id,
     const media::VideoCaptureParams& params) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DVLOG(1) << "VideoCaptureHost::OnResumeCapture, device_id " << device_id;
 
   VideoCaptureControllerID controller_id(device_id);
   EntryMap::iterator it = entries_.find(controller_id);
-  if (it == entries_.end())
+  if (it == entries_.end() || !it->second)
     return;
 
-  if (it->second) {
-    media_stream_manager_->video_capture_manager()->ResumeCaptureForClient(
-        session_id, params, it->second.get(), controller_id, this);
-  }
+  media_stream_manager_->video_capture_manager()->ResumeCaptureForClient(
+      session_id, params, it->second.get(), controller_id, this);
+  Send(new VideoCaptureMsg_StateChanged(device_id,
+                                        VIDEO_CAPTURE_STATE_RESUMED));
 }
 
 void VideoCaptureHost::OnRequestRefreshFrame(int device_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DVLOG(1) << "VideoCaptureHost::OnRequestRefreshFrame, device_id "
            << device_id;
 
   VideoCaptureControllerID controller_id(device_id);
   EntryMap::iterator it = entries_.find(controller_id);
   if (it == entries_.end())
@@ skipping 66 matching lines @@
     return;
 
   if (it->second) {
     media_stream_manager_->video_capture_manager()->StopCaptureForClient(
         it->second.get(), controller_id, this, on_error);
   }
   entries_.erase(it);
 }
 
 }  // namespace content