Pass camera facing info to audio client

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 16 matching lines @@
 #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/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.h"
 #include "content/browser/renderer_host/media/video_frame_receiver_on_io_thread.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/base/video_facing.h"
 #include "media/capture/video/video_capture_buffer_pool_impl.h"
 #include "media/capture/video/video_capture_buffer_tracker_factory_impl.h"
 #include "media/capture/video/video_capture_device.h"
 #include "media/capture/video/video_capture_device_client.h"
 #include "media/capture/video/video_capture_device_factory.h"
 
 #if defined(ENABLE_SCREEN_CAPTURE)
 
 #if BUILDFLAG(ENABLE_WEBRTC) && !defined(OS_ANDROID)
 #include "content/browser/media/capture/desktop_capture_device.h"
@@ skipping 281 matching lines @@
     int serial_id,
     media::VideoCaptureSessionId session_id,
     const media::VideoCaptureParams& params)
     : serial_id_(serial_id),
       session_id_(session_id),
       params_(params),
       abort_start_(false) {
 }
 
 VideoCaptureManager::VideoCaptureManager(
-    std::unique_ptr<media::VideoCaptureDeviceFactory> factory)
+    std::unique_ptr<media::VideoCaptureDeviceFactory> factory,
+    component::VideoCaptureOberser observer)
     : listener_(nullptr),
       new_capture_session_id_(1),
-      video_capture_device_factory_(std::move(factory)) {}
+      video_capture_device_factory_(std::move(factory)),
+      capture_observer_(observer) {}
 
 VideoCaptureManager::~VideoCaptureManager() {
   DCHECK(devices_.empty());
   DCHECK(device_start_queue_.empty());
 }
 
 void VideoCaptureManager::Register(
     MediaStreamProviderListener* listener,
     const scoped_refptr<base::SingleThreadTaskRunner>& device_task_runner) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
@@ skipping 294 matching lines @@
 
   std::unique_ptr<VideoCaptureDevice> video_capture_device;
   video_capture_device =
       video_capture_device_factory_->CreateDevice(descriptor);
 
   if (!video_capture_device) {
     device_client->OnError(FROM_HERE, "Could not create capture device");
     return nullptr;
   }
 
+  if (capture_observer_ != NULL) {
+    component::VideoFacingMode facing =
+        component::VideoFacingMode::NONE;
+    switch (descriptor.facing) {
+      case media::MEDIA_VIDEO_FACING_NONE:
+      case media::NUM_MEDIA_VIDEO_FACING_MODE:
+        facing = component::VideoFacingMode::NONE;
+        break;
+      case media::MEDIA_VIDEO_FACING_USER:
+        facing = component::VideoFacingMode::USER;
+        break;
+      case media::MEDIA_VIDEO_FACING_ENVIRONMENT:
+        facing = component::VideoFacingMode::ENVIRONMENT;
+        break;
+    }
+    capture_observer_->OnVideoCaptureStarted(facing);

[chfremer, 2017/01/20 18:23:53]

Where will we call OnVideoCaptureStopped()?

[shenghao, 2017/01/24 12:52:01]

Oh I forgot to add it.

+  }
+
   video_capture_device->AllocateAndStart(params, std::move(device_client));
   return video_capture_device;
 }
 
 std::unique_ptr<media::VideoCaptureDevice>
 VideoCaptureManager::DoStartTabCaptureOnDeviceThread(
     const std::string& id,
     const media::VideoCaptureParams& params,
     std::unique_ptr<VideoCaptureDevice::Client> device_client) {
   SCOPED_UMA_HISTOGRAM_TIMER("Media.VideoCaptureManager.StartDeviceTime");
@@ skipping 662 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