Remove candidates when doing continual gathering

webrtc/api/java/jni/peerconnection_jni.cc

 /*
  *  Copyright 2013 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.
  */
 
@@ skipping 38 matching lines @@
 #include "webrtc/api/java/jni/androidnetworkmonitor_jni.h"
 #include "webrtc/api/java/jni/androidvideocapturer_jni.h"
 #include "webrtc/api/java/jni/classreferenceholder.h"
 #include "webrtc/api/java/jni/jni_helpers.h"
 #include "webrtc/api/java/jni/native_handle_impl.h"
 #include "webrtc/api/mediaconstraintsinterface.h"
 #include "webrtc/api/peerconnectioninterface.h"
 #include "webrtc/api/rtpreceiverinterface.h"
 #include "webrtc/api/rtpsenderinterface.h"
 #include "webrtc/api/videosourceinterface.h"
+#include "webrtc/api/webrtcsdp.h"
 #include "webrtc/base/bind.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/base/event_tracer.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/logsinks.h"
 #include "webrtc/base/messagequeue.h"
 #include "webrtc/base/networkmonitor.h"
 #include "webrtc/base/ssladapter.h"
 #include "webrtc/base/stringutils.h"
 #include "webrtc/media/base/videocapturer.h"
@@ skipping 119 matching lines @@
 
   void OnIceCandidate(const IceCandidateInterface* candidate) override {
     ScopedLocalRefFrame local_ref_frame(jni());
     std::string sdp;
     RTC_CHECK(candidate->ToString(&sdp)) << "got so far: " << sdp;
     jclass candidate_class = FindClass(jni(), "org/webrtc/IceCandidate");
     jmethodID ctor = GetMethodID(jni(), candidate_class,
         "<init>", "(Ljava/lang/String;ILjava/lang/String;)V");
     jstring j_mid = JavaStringFromStdString(jni(), candidate->sdp_mid());
     jstring j_sdp = JavaStringFromStdString(jni(), sdp);
-    jobject j_candidate = jni()->NewObject(
-        candidate_class, ctor, j_mid, candidate->sdp_mline_index(), j_sdp);
+    jobject j_candidate = jni()->NewObject(candidate_class, ctor, j_mid,
+                                           candidate->sdp_mline_index(), j_sdp);
     CHECK_EXCEPTION(jni()) << "error during NewObject";
     jmethodID m = GetMethodID(jni(), *j_observer_class_,
                               "onIceCandidate", "(Lorg/webrtc/IceCandidate;)V");
     jni()->CallVoidMethod(*j_observer_global_, m, j_candidate);
     CHECK_EXCEPTION(jni()) << "error during CallVoidMethod";
   }
 
+  void OnIceCandidatesRemoved(const cricket::Candidates& candidates) {
+    ScopedLocalRefFrame local_ref_frame(jni());
+    jobjectArray candidates_array = ToJavaCandidateArray(jni(), candidates);
+    jmethodID m =
+        GetMethodID(jni(), *j_observer_class_, "onIceCandidatesRemoved",
+                    "([Lorg/webrtc/IceCandidate;)V");
+    jni()->CallVoidMethod(*j_observer_global_, m, candidates_array);
+    CHECK_EXCEPTION(jni()) << "Error during CallVoidMethod";
+  }
+
   void OnSignalingChange(
       PeerConnectionInterface::SignalingState new_state) override {
     ScopedLocalRefFrame local_ref_frame(jni());
     jmethodID m = GetMethodID(
         jni(), *j_observer_class_, "onSignalingChange",
         "(Lorg/webrtc/PeerConnection$SignalingState;)V");
     jobject new_state_enum =
         JavaEnumFromIndex(jni(), "PeerConnection$SignalingState", new_state);
     jni()->CallVoidMethod(*j_observer_global_, m, new_state_enum);
     CHECK_EXCEPTION(jni()) << "error during CallVoidMethod";
@@ skipping 147 matching lines @@
 
   void DisposeRemoteStream(const NativeToJavaStreamsMap::iterator& it) {
     jobject j_stream = it->second;
     remote_streams_.erase(it);
     jni()->CallVoidMethod(
         j_stream, GetMethodID(jni(), *j_media_stream_class_, "dispose", "()V"));
     CHECK_EXCEPTION(jni()) << "error during MediaStream.dispose()";
     DeleteGlobalRef(jni(), j_stream);
   }
 
+  jobject ToJavaCandidate(JNIEnv* jni,
+                          jclass* candidate_class,
+                          const cricket::Candidate& candidate) {
+    std::string sdp = webrtc::SdpSerializeCandidate(candidate);
+    RTC_CHECK(!sdp.empty()) << "got an empty ICE candidate";
+    jmethodID ctor = GetMethodID(jni, *candidate_class, "<init>",
+                                 "(Ljava/lang/String;ILjava/lang/String;)V");
+    jstring j_mid = JavaStringFromStdString(jni, candidate.transport_name());
+    jstring j_sdp = JavaStringFromStdString(jni, sdp);
+    // sdp_mline_index is not used, pass an invalid value -1.
+    jobject j_candidate =
+        jni->NewObject(*candidate_class, ctor, j_mid, -1, j_sdp);
+    CHECK_EXCEPTION(jni) << "error during Java Candidate NewObject";
+    return j_candidate;
+  }
+
+  jobjectArray ToJavaCandidateArray(JNIEnv* jni,
+                                    const cricket::Candidates& candidates) {
+    jclass candidate_class = FindClass(jni, "org/webrtc/IceCandidate");
+    jobjectArray java_candidates =
+        jni->NewObjectArray(candidates.size(), candidate_class, NULL);
+    int i = 0;
+    for (const cricket::Candidate& candidate : candidates) {
+      jobject j_candidate = ToJavaCandidate(jni, &candidate_class, candidate);
+      jni->SetObjectArrayElement(java_candidates, i++, j_candidate);
+    }
+    return java_candidates;
+  }
+
   JNIEnv* jni() {
     return AttachCurrentThreadIfNeeded();
   }
 
   const ScopedGlobalRef<jobject> j_observer_global_;
   const ScopedGlobalRef<jclass> j_observer_class_;
   const ScopedGlobalRef<jclass> j_media_stream_class_;
   const jmethodID j_media_stream_ctor_;
   const ScopedGlobalRef<jclass> j_audio_track_class_;
   const jmethodID j_audio_track_ctor_;
@@ skipping 1333 matching lines @@
 JOW(jboolean, PeerConnection_nativeAddIceCandidate)(
     JNIEnv* jni, jobject j_pc, jstring j_sdp_mid,
     jint j_sdp_mline_index, jstring j_candidate_sdp) {
   std::string sdp_mid = JavaToStdString(jni, j_sdp_mid);
   std::string sdp = JavaToStdString(jni, j_candidate_sdp);
   scoped_ptr<IceCandidateInterface> candidate(
       webrtc::CreateIceCandidate(sdp_mid, j_sdp_mline_index, sdp, NULL));
   return ExtractNativePC(jni, j_pc)->AddIceCandidate(candidate.get());
 }
 
+static cricket::Candidate GetCandidateFromJava(JNIEnv* jni,
+                                               jobject j_candidate) {
+  jclass j_candidate_class = GetObjectClass(jni, j_candidate);
+  jfieldID j_sdp_mid_id =
+      GetFieldID(jni, j_candidate_class, "sdpMid", "Ljava/lang/String;");
+  std::string sdp_mid =
+      JavaToStdString(jni, GetStringField(jni, j_candidate, j_sdp_mid_id));
+  jfieldID j_sdp_id =
+      GetFieldID(jni, j_candidate_class, "sdp", "Ljava/lang/String;");
+  std::string sdp =
+      JavaToStdString(jni, GetStringField(jni, j_candidate, j_sdp_id));
+  cricket::Candidate candidate;
+  if (!webrtc::SdpDeserializeCandidate(sdp_mid, sdp, &candidate, NULL)) {
+    LOG(LS_ERROR) << "SdpDescrializeCandidate failed with sdp " << sdp;
+  }
+  return candidate;
+}
+
+JOW(jboolean, PeerConnection_nativeRemoveIceCandidates)
+(JNIEnv* jni, jobject j_pc, jobjectArray j_candidates) {
+  std::vector<cricket::Candidate> candidates;
+  size_t num_candidates = jni->GetArrayLength(j_candidates);
+  for (size_t i = 0; i < num_candidates; ++i) {
+    jobject j_candidate = jni->GetObjectArrayElement(j_candidates, i);
+    candidates.push_back(GetCandidateFromJava(jni, j_candidate));
+  }
+  return ExtractNativePC(jni, j_pc)->RemoveIceCandidates(candidates);
+}
+
 JOW(jboolean, PeerConnection_nativeAddLocalStream)(
     JNIEnv* jni, jobject j_pc, jlong native_stream) {
   return ExtractNativePC(jni, j_pc)->AddStream(
       reinterpret_cast<MediaStreamInterface*>(native_stream));
 }
 
 JOW(void, PeerConnection_nativeRemoveLocalStream)(
     JNIEnv* jni, jobject j_pc, jlong native_stream) {
   ExtractNativePC(jni, j_pc)->RemoveStream(
       reinterpret_cast<MediaStreamInterface*>(native_stream));
@@ skipping 302 matching lines @@
   return JavaStringFromStdString(
       jni,
       reinterpret_cast<RtpReceiverInterface*>(j_rtp_receiver_pointer)->id());
 }
 
 JOW(void, RtpReceiver_free)(JNIEnv* jni, jclass, jlong j_rtp_receiver_pointer) {
   reinterpret_cast<RtpReceiverInterface*>(j_rtp_receiver_pointer)->Release();
 }
 
 }  // namespace webrtc_jni