From 2c599d663d45dd760aac8f0b37c1d65d52c19698 Mon Sep 17 00:00:00 2001
From: Tommi <tommi@webrtc.org>
Date: Thu, 15 Feb 2018 11:08:36 +0100
Subject: [PATCH] Allow native aec to be used in peerconnection_client if
 available on windows.

Change-Id: Ia0e2e8b5f755602e58c6be75b7ff57ab1e0528fb
Bug: webrtc:8891
Reviewed-on: https://webrtc-review.googlesource.com/53740
Commit-Queue: Tommi <tommi@webrtc.org>
Reviewed-by: Oskar Sundbom <ossu@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22032}
---
 examples/peerconnection/client/conductor.cc   | 22 +++++++++++++------
 .../audio_device/win/audio_device_core_win.cc |  4 ++++
 .../audio_device/win/audio_device_core_win.h  |  2 ++
 3 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/examples/peerconnection/client/conductor.cc b/examples/peerconnection/client/conductor.cc
index f15e221d4f..214ccfabec 100644
--- a/examples/peerconnection/client/conductor.cc
+++ b/examples/peerconnection/client/conductor.cc
@@ -415,18 +415,26 @@ void Conductor::AddStreams() {
       peer_connection_factory_->CreateAudioTrack(
           kAudioLabel, peer_connection_factory_->CreateAudioSource(NULL)));
 
-  rtc::scoped_refptr<webrtc::VideoTrackInterface> video_track(
-      peer_connection_factory_->CreateVideoTrack(
-          kVideoLabel,
-          peer_connection_factory_->CreateVideoSource(OpenVideoCaptureDevice(),
-                                                      NULL)));
-  main_wnd_->StartLocalRenderer(video_track);
+  rtc::scoped_refptr<webrtc::VideoTrackInterface> video_track;
+  auto video_device(OpenVideoCaptureDevice());
+  if (video_device) {
+    video_track =
+        peer_connection_factory_->CreateVideoTrack(
+            kVideoLabel,
+            peer_connection_factory_->CreateVideoSource(std::move(video_device),
+                                                        NULL));
+    main_wnd_->StartLocalRenderer(video_track);
+  } else {
+    RTC_LOG(LS_ERROR) << "OpenVideoCaptureDevice failed";
+  }
 
   rtc::scoped_refptr<webrtc::MediaStreamInterface> stream =
       peer_connection_factory_->CreateLocalMediaStream(kStreamLabel);
 
   stream->AddTrack(audio_track);
-  stream->AddTrack(video_track);
+  if (video_track)
+    stream->AddTrack(video_track);
+
   if (!peer_connection_->AddStream(stream)) {
     RTC_LOG(LS_ERROR) << "Adding stream to PeerConnection failed";
   }
diff --git a/modules/audio_device/win/audio_device_core_win.cc b/modules/audio_device/win/audio_device_core_win.cc
index 834fa4ed25..4aaefc91a4 100644
--- a/modules/audio_device/win/audio_device_core_win.cc
+++ b/modules/audio_device/win/audio_device_core_win.cc
@@ -2634,6 +2634,10 @@ int32_t AudioDeviceWindowsCore::PlayoutDelay(uint16_t& delayMS) const {
   return 0;
 }
 
+bool AudioDeviceWindowsCore::BuiltInAECIsAvailable() const {
+  return _dmo != nullptr;
+}
+
 // ----------------------------------------------------------------------------
 //  Playing
 // ----------------------------------------------------------------------------
diff --git a/modules/audio_device/win/audio_device_core_win.h b/modules/audio_device/win/audio_device_core_win.h
index b5c2b72d30..a11849da77 100644
--- a/modules/audio_device/win/audio_device_core_win.h
+++ b/modules/audio_device/win/audio_device_core_win.h
@@ -170,6 +170,8 @@ public:
     // Delay information and control
     virtual int32_t PlayoutDelay(uint16_t& delayMS) const;
 
+    virtual bool BuiltInAECIsAvailable() const;
+
     virtual int32_t EnableBuiltInAEC(bool enable);
 
 public: