Media Stream Image Capture (4): wire takePhoto and implement in FakeVCDevice

content/browser/renderer_host/media/video_capture_manager.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_manager.h"
 
 #include <algorithm>
 #include <set>
 #include <utility>
 
@@ skipping 822 matching lines @@
   device_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&VideoCaptureManager::SetDesktopCaptureWindowIdOnDeviceThread,
                  this,
                  existing_device->video_capture_device(),
                  window_id_it->second));
 
   notification_window_ids_.erase(window_id_it);
 }
 
+bool VideoCaptureManager::TakePhoto(
+    int session_id,
+    const media::VideoCaptureDevice::TakePhotoCallback& photo_callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  SessionMap::const_iterator session_it = sessions_.find(session_id);
+  if (session_it == sessions_.end())
+    return false;
+
+  DeviceEntry* const device_info =
+      GetDeviceEntryForMediaStreamDevice(session_it->second);
+  if (!device_info)
+    return false;
+  return device_info->video_capture_device()->TakePhoto(photo_callback);
+}
+
 void VideoCaptureManager::DoStopDeviceOnDeviceThread(
     std::unique_ptr<media::VideoCaptureDevice> device) {
   SCOPED_UMA_HISTOGRAM_TIMER("Media.VideoCaptureManager.StopDeviceTime");
   DCHECK(IsOnDeviceThread());
   device->StopAndDeAllocate();
   DVLOG(3) << "DoStopDeviceOnDeviceThread";
 }
 
 void VideoCaptureManager::OnOpened(
     MediaStreamType stream_type,
@@ skipping 242 matching lines @@
       continue;
 
     // Session ID is only valid for Screen capture. So we can fake it to resume
     // video capture devices here.
     QueueStartDevice(kFakeSessionId, entry, entry->parameters);
   }
 }
 #endif  // defined(OS_ANDROID)
 
 }  // namespace content