Build WebRTC with data channel only.

webrtc/pc/createpeerconnectionfactory_datachannelonly.cc

Index: webrtc/pc/createpeerconnectionfactory_datachannelonly.cc
diff --git a/webrtc/pc/createpeerconnectionfactory_datachannelonly.cc b/webrtc/pc/createpeerconnectionfactory_datachannelonly.cc
new file mode 100644
index 0000000000000000000000000000000000000000..addf9d0f3b5a409bb7dfd7e0699e7f48785f2d35
--- /dev/null
+++ b/webrtc/pc/createpeerconnectionfactory_datachannelonly.cc
@@ -0,0 +1,75 @@
+/*
+ *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/api/peerconnectioninterface.h"
+#include "webrtc/base/bind.h"
+#include "webrtc/base/scoped_ref_ptr.h"
+#include "webrtc/base/thread.h"
+#include "webrtc/call/callfactoryinterface.h"
+#include "webrtc/media/engine/webrtcmediaengine.h"  // nogncheck
+
+namespace webrtc {
+
+rtc::scoped_refptr<PeerConnectionFactoryInterface> CreatePeerConnectionFactory(
+    rtc::scoped_refptr<AudioEncoderFactory> audio_encoder_factory,
+    rtc::scoped_refptr<AudioDecoderFactory> audio_decoder_factory) {
+  rtc::Thread* worker_thread = rtc::Thread::Create().release();
+  worker_thread->Start();
+
+  return CreateModularPeerConnectionFactory(
+      worker_thread, audio_encoder_factory, audio_decoder_factory,
+      std::unique_ptr<cricket::MediaEngineInterface>(),
+      std::unique_ptr<CallFactoryInterface>(),
+      std::unique_ptr<RtcEventLogFactoryInterface>());
+}
+
+rtc::scoped_refptr<PeerConnectionFactoryInterface>
+CreatePeerConnectionFactory() {
+  return CreatePeerConnectionFactory(nullptr /*AudioEncoderFactory*/,
+                                     nullptr /*AudioDecoderFactory*/);
+}
+
+rtc::scoped_refptr<PeerConnectionFactoryInterface>
+CreatePeerConnectionFactoryWithAudioMixer(
+    rtc::Thread* network_thread,
+    rtc::Thread* worker_thread,
+    rtc::Thread* signaling_thread,
+    AudioDeviceModule* default_adm,
+    rtc::scoped_refptr<AudioEncoderFactory> audio_encoder_factory,
+    rtc::scoped_refptr<AudioDecoderFactory> audio_decoder_factory,
+    cricket::WebRtcVideoEncoderFactory* video_encoder_factory,
+    cricket::WebRtcVideoDecoderFactory* video_decoder_factory,
+    rtc::scoped_refptr<AudioMixer> audio_mixer) {
+  return CreateModularPeerConnectionFactory(
+      network_thread, worker_thread, signaling_thread, default_adm,
+      audio_encoder_factory, audio_decoder_factory, video_encoder_factory,
+      video_decoder_factory, audio_mixer,
+      std::unique_ptr<cricket::MediaEngineInterface>(),
+      std::unique_ptr<CallFactoryInterface>(),
+      std::unique_ptr<RtcEventLogFactoryInterface>());
+}
+
+rtc::scoped_refptr<PeerConnectionFactoryInterface>
+CreatePeerConnectionFactoryWithAudioMixer(
+    rtc::Thread* network_thread,
+    rtc::Thread* worker_thread,
+    rtc::Thread* signaling_thread,
+    AudioDeviceModule* default_adm,
+    cricket::WebRtcVideoEncoderFactory* encoder_factory,
+    cricket::WebRtcVideoDecoderFactory* decoder_factory,
+    rtc::scoped_refptr<AudioMixer> audio_mixer) {
+  return CreatePeerConnectionFactoryWithAudioMixer(
+      network_thread, worker_thread, signaling_thread, default_adm,
+      nullptr, /*AudioEncoderFactory*/
+      nullptr /*AudioDecoderFactory*/, encoder_factory, decoder_factory,
+      audio_mixer);
+}
+
+}  // namespace webrtc