VideoCaptureParams: add flag for hinting capture using GpuMemoryBuffers & flag for it

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 "base/bind.h"
 #include "base/bind_helpers.h"
+#include "base/command_line.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/single_thread_task_runner.h"
 #include "base/stl_util.h"
 #include "base/task_runner_util.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "content/browser/media/capture/web_contents_video_capture_device.h"
 #include "content/browser/media/media_internals.h"
 #include "content/browser/renderer_host/media/video_capture_controller.h"
 #include "content/browser/renderer_host/media/video_capture_controller_event_handler.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/desktop_media_id.h"
 #include "content/public/common/media_stream_request.h"
 #include "media/base/bind_to_current_loop.h"
+#include "media/base/media_switches.h"
 #include "media/video/capture/video_capture_device.h"
 #include "media/video/capture/video_capture_device_factory.h"
 
 #if defined(ENABLE_SCREEN_CAPTURE)
 #include "content/browser/media/capture/desktop_capture_device.h"
 #if defined(USE_AURA)
 #include "content/browser/media/capture/desktop_capture_device_aura.h"
 #endif
 #endif
 
@@ skipping 278 matching lines @@
 
   const int serial_id = request->serial_id();
   DeviceEntries::iterator entry_it = std::find_if(
       devices_.begin(), devices_.end(),
       [serial_id] (const DeviceEntry* e) {
         return e->serial_id == serial_id;
       });
   DCHECK(entry_it != devices_.end());
   DeviceEntry* entry =  (*entry_it);
 
+  media::VideoCaptureParams params = request->params();
+#if defined(OS_LINUX)
+  params.use_native_gpu_memory_buffers =
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kUseNativeGpuMemoryBuffersForCapture);
+#endif
+
   DVLOG(3) << "HandleQueuedStartRequest, Post start to device thread, device = "
            << entry->id << " start id = " << entry->serial_id;
   base::PostTaskAndReplyWithResult(
       device_task_runner_.get(),
       FROM_HERE,
       base::Bind(
           &VideoCaptureManager::DoStartDeviceOnDeviceThread,
           this,
           request->session_id(),
           entry->id,
           entry->stream_type,
-          request->params(),
+          params,
           base::Passed(entry->video_capture_controller()->NewDeviceClient(
               device_task_runner_))),
       base::Bind(&VideoCaptureManager::OnDeviceStarted, this,
                  request->serial_id()));
 }
 
 void VideoCaptureManager::OnDeviceStarted(
     int serial_id,
     scoped_ptr<media::VideoCaptureDevice> device) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
@@ skipping 513 matching lines @@
   DCHECK(IsOnDeviceThread());
 #if defined(ENABLE_SCREEN_CAPTURE)
   DesktopCaptureDevice* desktop_device =
       static_cast<DesktopCaptureDevice*>(device);
   desktop_device->SetNotificationWindowId(window_id);
   VLOG(2) << "Screen capture notification window passed on device thread.";
 #endif
 }
 
 }  // namespace content