Support building WebRTC without audio and video for Android

webrtc/sdk/android/src/jni/ownedfactoryandthreads.cc

Index: webrtc/sdk/android/src/jni/ownedfactoryandthreads.cc
diff --git a/webrtc/sdk/android/src/jni/ownedfactoryandthreads.cc b/webrtc/sdk/android/src/jni/ownedfactoryandthreads.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7171852dec86b12e60ec9c9455ddce67dcfd889c
--- /dev/null
+++ b/webrtc/sdk/android/src/jni/ownedfactoryandthreads.cc
@@ -0,0 +1,64 @@
+/*
+ *  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/sdk/android/src/jni/ownedfactoryandthreads.h"
+
+#include "webrtc/base/logging.h"
+#include "webrtc/sdk/android/src/jni/classreferenceholder.h"
+#include "webrtc/sdk/android/src/jni/jni_helpers.h"
+
+namespace webrtc_jni {
+
+PeerConnectionFactoryInterface* factoryFromJava(jlong j_p) {
+  return reinterpret_cast<OwnedFactoryAndThreads*>(j_p)->factory();
+}
+
+OwnedFactoryAndThreads::~OwnedFactoryAndThreads() {
+  CHECK_RELEASE(factory_);
+  if (network_monitor_factory_ != nullptr) {
+    rtc::NetworkMonitorFactory::ReleaseFactory(network_monitor_factory_);
+  }
+}
+
+void OwnedFactoryAndThreads::JavaCallbackOnFactoryThreads() {
+  JNIEnv* jni = AttachCurrentThreadIfNeeded();
+  ScopedLocalRefFrame local_ref_frame(jni);
+  jclass j_factory_class = FindClass(jni, "org/webrtc/PeerConnectionFactory");
+  jmethodID m = nullptr;
+  if (network_thread_->IsCurrent()) {
+    LOG(LS_INFO) << "Network thread JavaCallback";
+    m = GetStaticMethodID(jni, j_factory_class, "onNetworkThreadReady", "()V");
+  }
+  if (worker_thread_->IsCurrent()) {
+    LOG(LS_INFO) << "Worker thread JavaCallback";
+    m = GetStaticMethodID(jni, j_factory_class, "onWorkerThreadReady", "()V");
+  }
+  if (signaling_thread_->IsCurrent()) {
+    LOG(LS_INFO) << "Signaling thread JavaCallback";
+    m = GetStaticMethodID(jni, j_factory_class, "onSignalingThreadReady",
+                          "()V");
+  }
+  if (m != nullptr) {
+    jni->CallStaticVoidMethod(j_factory_class, m);
+    CHECK_EXCEPTION(jni) << "error during JavaCallback::CallStaticVoidMethod";
+  }
+}
+
+void OwnedFactoryAndThreads::InvokeJavaCallbacksOnFactoryThreads() {
+  LOG(LS_INFO) << "InvokeJavaCallbacksOnFactoryThreads.";
+  network_thread_->Invoke<void>(RTC_FROM_HERE,
+                                [this] { JavaCallbackOnFactoryThreads(); });
+  worker_thread_->Invoke<void>(RTC_FROM_HERE,
+                               [this] { JavaCallbackOnFactoryThreads(); });
+  signaling_thread_->Invoke<void>(RTC_FROM_HERE,
+                                  [this] { JavaCallbackOnFactoryThreads(); });
+}
+
+}  // namespace webrtc_jni