Add IPC to query capabilities of video input devices.

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 871 matching lines @@
     media::VideoCaptureSessionId capture_session_id,
     media::VideoCaptureFormats* supported_formats) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK(supported_formats->empty());
 
   SessionMap::iterator it = sessions_.find(capture_session_id);
   if (it == sessions_.end())
     return false;
   DVLOG(1) << "GetDeviceSupportedFormats for device: " << it->second.name;
 
+  return GetDeviceSupportedFormats(it->second.id, supported_formats);
+}
+
+bool VideoCaptureManager::GetDeviceSupportedFormats(
+    const std::string& device_id,
+    media::VideoCaptureFormats* supported_formats) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  DCHECK(supported_formats->empty());
+
   // Return all available formats of the device, regardless its started state.
-  DeviceInfo* existing_device = GetDeviceInfoById(it->second.id);
+  DeviceInfo* existing_device = GetDeviceInfoById(device_id);
   if (existing_device)
     *supported_formats = existing_device->supported_formats;
   return true;
 }
 
 bool VideoCaptureManager::GetDeviceFormatsInUse(
     media::VideoCaptureSessionId capture_session_id,
     media::VideoCaptureFormats* formats_in_use) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK(formats_in_use->empty());
 
   SessionMap::iterator it = sessions_.find(capture_session_id);
   if (it == sessions_.end())
     return false;
   DVLOG(1) << "GetDeviceFormatsInUse for device: " << it->second.name;
 
+  return GetDeviceFormatsInUse(it->second.type, it->second.id, formats_in_use);
+}
+
+bool VideoCaptureManager::GetDeviceFormatsInUse(
+    MediaStreamType stream_type,
+    const std::string& device_id,
+    media::VideoCaptureFormats* formats_in_use) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  DCHECK(formats_in_use->empty());
   // Return the currently in-use format(s) of the device, if it's started.
   DeviceEntry* device_in_use =
-      GetDeviceEntryByTypeAndId(it->second.type, it->second.id);
+      GetDeviceEntryByTypeAndId(stream_type, device_id);
   if (device_in_use) {
     // Currently only one format-in-use is supported at the VCC level.
     formats_in_use->push_back(
         device_in_use->video_capture_controller.GetVideoCaptureFormat());
   }
   return true;
 }
 
 void VideoCaptureManager::SetDesktopCaptureWindowId(
     media::VideoCaptureSessionId session_id,
@@ skipping 401 matching lines @@
     if (!device_in_queue) {
       // Session ID is only valid for Screen capture. So we can fake it to
       // resume video capture devices here.
       QueueStartDevice(kFakeSessionId, entry.get(), entry->parameters);
     }
   }
 }
 #endif  // defined(OS_ANDROID)
 
 }  // namespace content