Pass camera facing to WebKit

content/browser/renderer_host/media/media_stream_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/media_stream_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 41 matching lines @@
 #include "media/capture/video/video_capture_device_factory.h"
 #include "url/gurl.h"
 #include "url/origin.h"
 
 #if defined(OS_WIN)
 #include "base/win/scoped_com_initializer.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/audio/cras_audio_handler.h"
+#include "media/capture/video/linux/camera_facing_chromeos.h"
 #endif
 
 namespace content {
 
 base::LazyInstance<base::ThreadLocalPointer<MediaStreamManager>>::Leaky
     g_media_stream_manager_tls_ptr = LAZY_INSTANCE_INITIALIZER;
 
 namespace {
+
+#if defined(OS_CHROMEOS)
+base::LazyInstance<media::CameraFacingChromeOS>::Leaky g_camera_facing_ =

[mcasas, 2017/01/11 22:24:58]

s/g_camera_facing_/g_camera_facing/ (no trailing underscore
if not a member).

[shenghao, 2017/01/12 08:10:48]

Done.

+    LAZY_INSTANCE_INITIALIZER;
+#endif
+
 // Creates a random label used to identify requests.
 std::string RandomLabel() {
   // An earlier PeerConnection spec [1] defined MediaStream::label alphabet as
   // an uuid with characters from range: U+0021, U+0023 to U+0027, U+002A to
   // U+002B, U+002D to U+002E, U+0030 to U+0039, U+0041 to U+005A, U+005E to
   // U+007E. That causes problems with searching for labels in bots, so we use a
   // safe alphanumeric subset |kAlphabet|.
   // [1] http://dev.w3.org/2011/webrtc/editor/webrtc.html
   static const char kAlphabet[] = "0123456789"
       "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
@@ skipping 120 matching lines @@
       return MEDIA_DEVICE_TYPE_AUDIO_INPUT;
     case MEDIA_DEVICE_VIDEO_CAPTURE:
       return MEDIA_DEVICE_TYPE_VIDEO_INPUT;
     default:
       NOTREACHED();
   }
 
   return NUM_MEDIA_DEVICE_TYPES;
 }
 
+VideoFacingMode GetVideoFacing(std::string device_id,
+                               std::string model_id,
+                               MediaStreamType stream_type) {
+#if defined(OS_CHROMEOS)
+  media::CameraFacingChromeOS::LensFacing facing =
+      g_camera_facing_.Get().GetCameraFacing(device_id, model_id);
+  switch (facing) {
+    case media::CameraFacingChromeOS::LensFacing::FRONT:
+      return VideoFacingMode::MEDIA_VIDEO_FACING_USER;
+    case media::CameraFacingChromeOS::LensFacing::BACK:
+      return VideoFacingMode::MEDIA_VIDEO_FACING_ENVIRONMENT;
+  }
+#endif
+  if (IsScreenCaptureMediaType(stream_type)) {
+    return VideoFacingMode::MEDIA_VIDEO_FACING_ENVIRONMENT;
+  }
+  return VideoFacingMode::MEDIA_VIDEO_FACING_NONE;
+}
+
 MediaStreamDevices ConvertToMediaStreamDevices(
     MediaStreamType stream_type,
     const MediaDeviceInfoArray& device_infos) {
   MediaStreamDevices devices;
   for (const auto& info : device_infos) {
-    devices.emplace_back(stream_type, info.device_id, info.label);
+    devices.emplace_back(
+        stream_type, info.device_id, info.label,
+        GetVideoFacing(info.device_id, info.model_id, stream_type));
   }
 
   return devices;
 }
 
 }  // namespace
 
 
 // MediaStreamManager::DeviceRequest represents a request to either enumerate
 // available devices or open one or more devices.
@@ skipping 1517 matching lines @@
   generate_stream_test_callback_ = test_callback;
 }
 
 #if defined(OS_WIN)
 void MediaStreamManager::FlushVideoCaptureThreadForTesting() {
   video_capture_thread_.FlushForTesting();
 }
 #endif
 
 }  // namespace content