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 222 matching lines @@
 
 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())
     return;
 
   if (it->second) {

[mcasas, 2016/09/28 21:34:43]

prefer early return?
if (!it->second)
  return;
// ...

here an in l.266

[miu, 2016/09/28 22:35:15]

Done.

     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())
     return;
 
   if (it->second) {
     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);
@@ skipping 67 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