Relanding: Break peerconnection_jni.cc into multiple files, in "pc" directory.

webrtc/sdk/android/src/jni/pc/java_native_conversion.cc

+/*
+ *  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/pc/java_native_conversion.h"
+
+#include <string>
+
+#include "webrtc/pc/webrtcsdp.h"
+#include "webrtc/sdk/android/src/jni/classreferenceholder.h"
+
+namespace webrtc_jni {
+
+webrtc::DataChannelInit JavaToNativeDataChannelInit(JNIEnv* jni,
+                                                    jobject j_init) {
+  webrtc::DataChannelInit init;
+
+  jclass j_init_class = FindClass(jni, "org/webrtc/DataChannel$Init");
+  jfieldID ordered_id = GetFieldID(jni, j_init_class, "ordered", "Z");
+  jfieldID max_retransmit_time_id =
+      GetFieldID(jni, j_init_class, "maxRetransmitTimeMs", "I");
+  jfieldID max_retransmits_id =
+      GetFieldID(jni, j_init_class, "maxRetransmits", "I");
+  jfieldID protocol_id =
+      GetFieldID(jni, j_init_class, "protocol", "Ljava/lang/String;");
+  jfieldID negotiated_id = GetFieldID(jni, j_init_class, "negotiated", "Z");
+  jfieldID id_id = GetFieldID(jni, j_init_class, "id", "I");
+
+  init.ordered = GetBooleanField(jni, j_init, ordered_id);
+  init.maxRetransmitTime = GetIntField(jni, j_init, max_retransmit_time_id);
+  init.maxRetransmits = GetIntField(jni, j_init, max_retransmits_id);
+  init.protocol =
+      JavaToStdString(jni, GetStringField(jni, j_init, protocol_id));
+  init.negotiated = GetBooleanField(jni, j_init, negotiated_id);
+  init.id = GetIntField(jni, j_init, id_id);
+
+  return init;
+}
+
+jobject NativeToJavaMediaType(JNIEnv* jni, cricket::MediaType media_type) {
+  jclass j_media_type_class =
+      FindClass(jni, "org/webrtc/MediaStreamTrack$MediaType");
+
+  const char* media_type_str = nullptr;
+  switch (media_type) {
+    case cricket::MEDIA_TYPE_AUDIO:
+      media_type_str = "MEDIA_TYPE_AUDIO";
+      break;
+    case cricket::MEDIA_TYPE_VIDEO:
+      media_type_str = "MEDIA_TYPE_VIDEO";
+      break;
+    case cricket::MEDIA_TYPE_DATA:
+      RTC_NOTREACHED();
+      break;
+  }
+  jfieldID j_media_type_fid =
+      GetStaticFieldID(jni, j_media_type_class, media_type_str,
+                       "Lorg/webrtc/MediaStreamTrack$MediaType;");
+  return GetStaticObjectField(jni, j_media_type_class, j_media_type_fid);
+}
+
+cricket::MediaType JavaToNativeMediaType(JNIEnv* jni, jobject j_media_type) {
+  jclass j_media_type_class =
+      FindClass(jni, "org/webrtc/MediaStreamTrack$MediaType");
+  jmethodID j_name_id =
+      GetMethodID(jni, j_media_type_class, "name", "()Ljava/lang/String;");
+  jstring j_type_string =
+      (jstring)jni->CallObjectMethod(j_media_type, j_name_id);
+  CHECK_EXCEPTION(jni) << "error during CallObjectMethod";
+  std::string type_string = JavaToStdString(jni, j_type_string);
+
+  RTC_DCHECK(type_string == "MEDIA_TYPE_AUDIO" ||
+             type_string == "MEDIA_TYPE_VIDEO")
+      << "Media type: " << type_string;
+  return type_string == "MEDIA_TYPE_AUDIO" ? cricket::MEDIA_TYPE_AUDIO
+                                           : cricket::MEDIA_TYPE_VIDEO;
+}
+
+cricket::Candidate JavaToNativeCandidate(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;
+}
+
+jobject NativeToJavaCandidate(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 NativeToJavaCandidateArray(
+    JNIEnv* jni,
+    const std::vector<cricket::Candidate>& 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 =
+        NativeToJavaCandidate(jni, &candidate_class, candidate);
+    jni->SetObjectArrayElement(java_candidates, i++, j_candidate);
+  }
+  return java_candidates;
+}
+
+webrtc::SessionDescriptionInterface* JavaToNativeSessionDescription(
+    JNIEnv* jni,
+    jobject j_sdp) {
+  jfieldID j_type_id = GetFieldID(jni, GetObjectClass(jni, j_sdp), "type",
+                                  "Lorg/webrtc/SessionDescription$Type;");
+  jobject j_type = GetObjectField(jni, j_sdp, j_type_id);
+  jmethodID j_canonical_form_id =
+      GetMethodID(jni, GetObjectClass(jni, j_type), "canonicalForm",
+                  "()Ljava/lang/String;");
+  jstring j_type_string =
+      (jstring)jni->CallObjectMethod(j_type, j_canonical_form_id);
+  CHECK_EXCEPTION(jni) << "error during CallObjectMethod";
+  std::string std_type = JavaToStdString(jni, j_type_string);
+
+  jfieldID j_description_id = GetFieldID(jni, GetObjectClass(jni, j_sdp),
+                                         "description", "Ljava/lang/String;");
+  jstring j_description = (jstring)GetObjectField(jni, j_sdp, j_description_id);
+  std::string std_description = JavaToStdString(jni, j_description);
+
+  return webrtc::CreateSessionDescription(std_type, std_description, NULL);
+}
+
+jobject NativeToJavaSessionDescription(
+    JNIEnv* jni,
+    const webrtc::SessionDescriptionInterface* desc) {
+  std::string sdp;
+  RTC_CHECK(desc->ToString(&sdp)) << "got so far: " << sdp;
+  jstring j_description = JavaStringFromStdString(jni, sdp);
+
+  jclass j_type_class = FindClass(jni, "org/webrtc/SessionDescription$Type");
+  jmethodID j_type_from_canonical = GetStaticMethodID(
+      jni, j_type_class, "fromCanonicalForm",
+      "(Ljava/lang/String;)Lorg/webrtc/SessionDescription$Type;");
+  jstring j_type_string = JavaStringFromStdString(jni, desc->type());
+  jobject j_type = jni->CallStaticObjectMethod(
+      j_type_class, j_type_from_canonical, j_type_string);
+  CHECK_EXCEPTION(jni) << "error during CallObjectMethod";
+
+  jclass j_sdp_class = FindClass(jni, "org/webrtc/SessionDescription");
+  jmethodID j_sdp_ctor =
+      GetMethodID(jni, j_sdp_class, "<init>",
+                  "(Lorg/webrtc/SessionDescription$Type;Ljava/lang/String;)V");
+  jobject j_sdp =
+      jni->NewObject(j_sdp_class, j_sdp_ctor, j_type, j_description);
+  CHECK_EXCEPTION(jni) << "error during NewObject";
+  return j_sdp;
+}
+
+webrtc::PeerConnectionFactoryInterface::Options
+JavaToNativePeerConnectionFactoryOptions(JNIEnv* jni, jobject options) {
+  jclass options_class = jni->GetObjectClass(options);
+  jfieldID network_ignore_mask_field =
+      jni->GetFieldID(options_class, "networkIgnoreMask", "I");
+  int network_ignore_mask =
+      jni->GetIntField(options, network_ignore_mask_field);
+
+  jfieldID disable_encryption_field =
+      jni->GetFieldID(options_class, "disableEncryption", "Z");
+  bool disable_encryption =
+      jni->GetBooleanField(options, disable_encryption_field);
+
+  jfieldID disable_network_monitor_field =
+      jni->GetFieldID(options_class, "disableNetworkMonitor", "Z");
+  bool disable_network_monitor =
+      jni->GetBooleanField(options, disable_network_monitor_field);
+
+  webrtc::PeerConnectionFactoryInterface::Options native_options;
+
+  // This doesn't necessarily match the c++ version of this struct; feel free
+  // to add more parameters as necessary.
+  native_options.network_ignore_mask = network_ignore_mask;
+  native_options.disable_encryption = disable_encryption;
+  native_options.disable_network_monitor = disable_network_monitor;
+  return native_options;
+}
+
+webrtc::PeerConnectionInterface::IceTransportsType
+JavaToNativeIceTransportsType(JNIEnv* jni, jobject j_ice_transports_type) {
+  std::string enum_name =
+      GetJavaEnumName(jni, "org/webrtc/PeerConnection$IceTransportsType",
+                      j_ice_transports_type);
+
+  if (enum_name == "ALL")
+    return webrtc::PeerConnectionInterface::kAll;
+
+  if (enum_name == "RELAY")
+    return webrtc::PeerConnectionInterface::kRelay;
+
+  if (enum_name == "NOHOST")
+    return webrtc::PeerConnectionInterface::kNoHost;
+
+  if (enum_name == "NONE")
+    return webrtc::PeerConnectionInterface::kNone;
+
+  RTC_CHECK(false) << "Unexpected IceTransportsType enum_name " << enum_name;
+  return webrtc::PeerConnectionInterface::kAll;
+}
+
+webrtc::PeerConnectionInterface::BundlePolicy JavaToNativeBundlePolicy(
+    JNIEnv* jni,
+    jobject j_bundle_policy) {
+  std::string enum_name = GetJavaEnumName(
+      jni, "org/webrtc/PeerConnection$BundlePolicy", j_bundle_policy);
+
+  if (enum_name == "BALANCED")
+    return webrtc::PeerConnectionInterface::kBundlePolicyBalanced;
+
+  if (enum_name == "MAXBUNDLE")
+    return webrtc::PeerConnectionInterface::kBundlePolicyMaxBundle;
+
+  if (enum_name == "MAXCOMPAT")
+    return webrtc::PeerConnectionInterface::kBundlePolicyMaxCompat;
+
+  RTC_CHECK(false) << "Unexpected BundlePolicy enum_name " << enum_name;
+  return webrtc::PeerConnectionInterface::kBundlePolicyBalanced;
+}
+
+webrtc::PeerConnectionInterface::RtcpMuxPolicy JavaToNativeRtcpMuxPolicy(
+    JNIEnv* jni,
+    jobject j_rtcp_mux_policy) {
+  std::string enum_name = GetJavaEnumName(
+      jni, "org/webrtc/PeerConnection$RtcpMuxPolicy", j_rtcp_mux_policy);
+
+  if (enum_name == "NEGOTIATE")
+    return webrtc::PeerConnectionInterface::kRtcpMuxPolicyNegotiate;
+
+  if (enum_name == "REQUIRE")
+    return webrtc::PeerConnectionInterface::kRtcpMuxPolicyRequire;
+
+  RTC_CHECK(false) << "Unexpected RtcpMuxPolicy enum_name " << enum_name;
+  return webrtc::PeerConnectionInterface::kRtcpMuxPolicyNegotiate;
+}
+
+webrtc::PeerConnectionInterface::TcpCandidatePolicy
+JavaToNativeTcpCandidatePolicy(JNIEnv* jni, jobject j_tcp_candidate_policy) {
+  std::string enum_name =
+      GetJavaEnumName(jni, "org/webrtc/PeerConnection$TcpCandidatePolicy",
+                      j_tcp_candidate_policy);
+
+  if (enum_name == "ENABLED")
+    return webrtc::PeerConnectionInterface::kTcpCandidatePolicyEnabled;
+
+  if (enum_name == "DISABLED")
+    return webrtc::PeerConnectionInterface::kTcpCandidatePolicyDisabled;
+
+  RTC_CHECK(false) << "Unexpected TcpCandidatePolicy enum_name " << enum_name;
+  return webrtc::PeerConnectionInterface::kTcpCandidatePolicyEnabled;
+}
+
+webrtc::PeerConnectionInterface::CandidateNetworkPolicy
+JavaToNativeCandidateNetworkPolicy(JNIEnv* jni,
+                                   jobject j_candidate_network_policy) {
+  std::string enum_name =
+      GetJavaEnumName(jni, "org/webrtc/PeerConnection$CandidateNetworkPolicy",
+                      j_candidate_network_policy);
+
+  if (enum_name == "ALL")
+    return webrtc::PeerConnectionInterface::kCandidateNetworkPolicyAll;
+
+  if (enum_name == "LOW_COST")
+    return webrtc::PeerConnectionInterface::kCandidateNetworkPolicyLowCost;
+
+  RTC_CHECK(false) << "Unexpected CandidateNetworkPolicy enum_name "
+                   << enum_name;
+  return webrtc::PeerConnectionInterface::kCandidateNetworkPolicyAll;
+}
+
+rtc::KeyType JavaToNativeKeyType(JNIEnv* jni, jobject j_key_type) {
+  std::string enum_name =
+      GetJavaEnumName(jni, "org/webrtc/PeerConnection$KeyType", j_key_type);
+
+  if (enum_name == "RSA")
+    return rtc::KT_RSA;
+  if (enum_name == "ECDSA")
+    return rtc::KT_ECDSA;
+
+  RTC_CHECK(false) << "Unexpected KeyType enum_name " << enum_name;
+  return rtc::KT_ECDSA;
+}
+
+webrtc::PeerConnectionInterface::ContinualGatheringPolicy
+JavaToNativeContinualGatheringPolicy(JNIEnv* jni, jobject j_gathering_policy) {
+  std::string enum_name =
+      GetJavaEnumName(jni, "org/webrtc/PeerConnection$ContinualGatheringPolicy",
+                      j_gathering_policy);
+  if (enum_name == "GATHER_ONCE")
+    return webrtc::PeerConnectionInterface::GATHER_ONCE;
+
+  if (enum_name == "GATHER_CONTINUALLY")
+    return webrtc::PeerConnectionInterface::GATHER_CONTINUALLY;
+
+  RTC_CHECK(false) << "Unexpected ContinualGatheringPolicy enum name "
+                   << enum_name;
+  return webrtc::PeerConnectionInterface::GATHER_ONCE;
+}
+
+webrtc::PeerConnectionInterface::TlsCertPolicy JavaToNativeTlsCertPolicy(
+    JNIEnv* jni,
+    jobject j_ice_server_tls_cert_policy) {
+  std::string enum_name =
+      GetJavaEnumName(jni, "org/webrtc/PeerConnection$TlsCertPolicy",
+                      j_ice_server_tls_cert_policy);
+
+  if (enum_name == "TLS_CERT_POLICY_SECURE")
+    return webrtc::PeerConnectionInterface::kTlsCertPolicySecure;
+
+  if (enum_name == "TLS_CERT_POLICY_INSECURE_NO_CHECK")
+    return webrtc::PeerConnectionInterface::kTlsCertPolicyInsecureNoCheck;
+
+  RTC_CHECK(false) << "Unexpected TlsCertPolicy enum_name " << enum_name;
+  return webrtc::PeerConnectionInterface::kTlsCertPolicySecure;
+}
+
+void JavaToNativeIceServers(
+    JNIEnv* jni,
+    jobject j_ice_servers,
+    webrtc::PeerConnectionInterface::IceServers* ice_servers) {
+  for (jobject j_ice_server : Iterable(jni, j_ice_servers)) {
+    jclass j_ice_server_class = GetObjectClass(jni, j_ice_server);
+    jfieldID j_ice_server_uri_id =
+        GetFieldID(jni, j_ice_server_class, "uri", "Ljava/lang/String;");
+    jfieldID j_ice_server_username_id =
+        GetFieldID(jni, j_ice_server_class, "username", "Ljava/lang/String;");
+    jfieldID j_ice_server_password_id =
+        GetFieldID(jni, j_ice_server_class, "password", "Ljava/lang/String;");
+    jfieldID j_ice_server_tls_cert_policy_id =
+        GetFieldID(jni, j_ice_server_class, "tlsCertPolicy",
+                   "Lorg/webrtc/PeerConnection$TlsCertPolicy;");
+    jobject j_ice_server_tls_cert_policy =
+        GetObjectField(jni, j_ice_server, j_ice_server_tls_cert_policy_id);
+    jfieldID j_ice_server_hostname_id =
+        GetFieldID(jni, j_ice_server_class, "hostname", "Ljava/lang/String;");
+    jstring uri = reinterpret_cast<jstring>(
+        GetObjectField(jni, j_ice_server, j_ice_server_uri_id));
+    jstring username = reinterpret_cast<jstring>(
+        GetObjectField(jni, j_ice_server, j_ice_server_username_id));
+    jstring password = reinterpret_cast<jstring>(
+        GetObjectField(jni, j_ice_server, j_ice_server_password_id));
+    webrtc::PeerConnectionInterface::TlsCertPolicy tls_cert_policy =
+        JavaToNativeTlsCertPolicy(jni, j_ice_server_tls_cert_policy);
+    jstring hostname = reinterpret_cast<jstring>(
+        GetObjectField(jni, j_ice_server, j_ice_server_hostname_id));
+    webrtc::PeerConnectionInterface::IceServer server;
+    server.uri = JavaToStdString(jni, uri);
+    server.username = JavaToStdString(jni, username);
+    server.password = JavaToStdString(jni, password);
+    server.tls_cert_policy = tls_cert_policy;
+    server.hostname = JavaToStdString(jni, hostname);
+    ice_servers->push_back(server);
+  }
+}
+
+void JavaToNativeRTCConfiguration(
+    JNIEnv* jni,
+    jobject j_rtc_config,
+    webrtc::PeerConnectionInterface::RTCConfiguration* rtc_config) {
+  jclass j_rtc_config_class = GetObjectClass(jni, j_rtc_config);
+
+  jfieldID j_ice_transports_type_id =
+      GetFieldID(jni, j_rtc_config_class, "iceTransportsType",
+                 "Lorg/webrtc/PeerConnection$IceTransportsType;");
+  jobject j_ice_transports_type =
+      GetObjectField(jni, j_rtc_config, j_ice_transports_type_id);
+
+  jfieldID j_bundle_policy_id =
+      GetFieldID(jni, j_rtc_config_class, "bundlePolicy",
+                 "Lorg/webrtc/PeerConnection$BundlePolicy;");
+  jobject j_bundle_policy =
+      GetObjectField(jni, j_rtc_config, j_bundle_policy_id);
+
+  jfieldID j_rtcp_mux_policy_id =
+      GetFieldID(jni, j_rtc_config_class, "rtcpMuxPolicy",
+                 "Lorg/webrtc/PeerConnection$RtcpMuxPolicy;");
+  jobject j_rtcp_mux_policy =
+      GetObjectField(jni, j_rtc_config, j_rtcp_mux_policy_id);
+
+  jfieldID j_tcp_candidate_policy_id =
+      GetFieldID(jni, j_rtc_config_class, "tcpCandidatePolicy",
+                 "Lorg/webrtc/PeerConnection$TcpCandidatePolicy;");
+  jobject j_tcp_candidate_policy =
+      GetObjectField(jni, j_rtc_config, j_tcp_candidate_policy_id);
+
+  jfieldID j_candidate_network_policy_id =
+      GetFieldID(jni, j_rtc_config_class, "candidateNetworkPolicy",
+                 "Lorg/webrtc/PeerConnection$CandidateNetworkPolicy;");
+  jobject j_candidate_network_policy =
+      GetObjectField(jni, j_rtc_config, j_candidate_network_policy_id);
+
+  jfieldID j_ice_servers_id =
+      GetFieldID(jni, j_rtc_config_class, "iceServers", "Ljava/util/List;");
+  jobject j_ice_servers = GetObjectField(jni, j_rtc_config, j_ice_servers_id);
+
+  jfieldID j_audio_jitter_buffer_max_packets_id =
+      GetFieldID(jni, j_rtc_config_class, "audioJitterBufferMaxPackets", "I");
+  jfieldID j_audio_jitter_buffer_fast_accelerate_id = GetFieldID(
+      jni, j_rtc_config_class, "audioJitterBufferFastAccelerate", "Z");
+
+  jfieldID j_ice_connection_receiving_timeout_id =
+      GetFieldID(jni, j_rtc_config_class, "iceConnectionReceivingTimeout", "I");
+
+  jfieldID j_ice_backup_candidate_pair_ping_interval_id = GetFieldID(
+      jni, j_rtc_config_class, "iceBackupCandidatePairPingInterval", "I");
+
+  jfieldID j_continual_gathering_policy_id =
+      GetFieldID(jni, j_rtc_config_class, "continualGatheringPolicy",
+                 "Lorg/webrtc/PeerConnection$ContinualGatheringPolicy;");
+  jobject j_continual_gathering_policy =
+      GetObjectField(jni, j_rtc_config, j_continual_gathering_policy_id);
+
+  jfieldID j_ice_candidate_pool_size_id =
+      GetFieldID(jni, j_rtc_config_class, "iceCandidatePoolSize", "I");
+  jfieldID j_presume_writable_when_fully_relayed_id = GetFieldID(
+      jni, j_rtc_config_class, "presumeWritableWhenFullyRelayed", "Z");
+
+  jfieldID j_prune_turn_ports_id =
+      GetFieldID(jni, j_rtc_config_class, "pruneTurnPorts", "Z");
+
+  jfieldID j_ice_check_min_interval_id = GetFieldID(
+      jni, j_rtc_config_class, "iceCheckMinInterval", "Ljava/lang/Integer;");
+  jclass j_integer_class = jni->FindClass("java/lang/Integer");
+  jmethodID int_value_id = GetMethodID(jni, j_integer_class, "intValue", "()I");
+
+  jfieldID j_disable_ipv6_on_wifi_id =
+      GetFieldID(jni, j_rtc_config_class, "disableIPv6OnWifi", "Z");
+
+  jfieldID j_max_ipv6_networks_id =
+      GetFieldID(jni, j_rtc_config_class, "maxIPv6Networks", "I");
+
+  jfieldID j_ice_regather_interval_range_id =
+      GetFieldID(jni, j_rtc_config_class, "iceRegatherIntervalRange",
+                 "Lorg/webrtc/PeerConnection$IntervalRange;");
+  jclass j_interval_range_class =
+      jni->FindClass("org/webrtc/PeerConnection$IntervalRange");
+  jmethodID get_min_id =
+      GetMethodID(jni, j_interval_range_class, "getMin", "()I");
+  jmethodID get_max_id =
+      GetMethodID(jni, j_interval_range_class, "getMax", "()I");
+
+  rtc_config->type = JavaToNativeIceTransportsType(jni, j_ice_transports_type);
+  rtc_config->bundle_policy = JavaToNativeBundlePolicy(jni, j_bundle_policy);
+  rtc_config->rtcp_mux_policy =
+      JavaToNativeRtcpMuxPolicy(jni, j_rtcp_mux_policy);
+  rtc_config->tcp_candidate_policy =
+      JavaToNativeTcpCandidatePolicy(jni, j_tcp_candidate_policy);
+  rtc_config->candidate_network_policy =
+      JavaToNativeCandidateNetworkPolicy(jni, j_candidate_network_policy);
+  JavaToNativeIceServers(jni, j_ice_servers, &rtc_config->servers);
+  rtc_config->audio_jitter_buffer_max_packets =
+      GetIntField(jni, j_rtc_config, j_audio_jitter_buffer_max_packets_id);
+  rtc_config->audio_jitter_buffer_fast_accelerate = GetBooleanField(
+      jni, j_rtc_config, j_audio_jitter_buffer_fast_accelerate_id);
+  rtc_config->ice_connection_receiving_timeout =
+      GetIntField(jni, j_rtc_config, j_ice_connection_receiving_timeout_id);
+  rtc_config->ice_backup_candidate_pair_ping_interval = GetIntField(
+      jni, j_rtc_config, j_ice_backup_candidate_pair_ping_interval_id);
+  rtc_config->continual_gathering_policy =
+      JavaToNativeContinualGatheringPolicy(jni, j_continual_gathering_policy);
+  rtc_config->ice_candidate_pool_size =
+      GetIntField(jni, j_rtc_config, j_ice_candidate_pool_size_id);
+  rtc_config->prune_turn_ports =
+      GetBooleanField(jni, j_rtc_config, j_prune_turn_ports_id);
+  rtc_config->presume_writable_when_fully_relayed = GetBooleanField(
+      jni, j_rtc_config, j_presume_writable_when_fully_relayed_id);
+  jobject j_ice_check_min_interval =
+      GetNullableObjectField(jni, j_rtc_config, j_ice_check_min_interval_id);
+  if (!IsNull(jni, j_ice_check_min_interval)) {
+    int ice_check_min_interval_value =
+        jni->CallIntMethod(j_ice_check_min_interval, int_value_id);
+    rtc_config->ice_check_min_interval =
+        rtc::Optional<int>(ice_check_min_interval_value);
+  }
+  rtc_config->disable_ipv6_on_wifi =
+      GetBooleanField(jni, j_rtc_config, j_disable_ipv6_on_wifi_id);
+  rtc_config->max_ipv6_networks =
+      GetIntField(jni, j_rtc_config, j_max_ipv6_networks_id);
+  jobject j_ice_regather_interval_range = GetNullableObjectField(
+      jni, j_rtc_config, j_ice_regather_interval_range_id);
+  if (!IsNull(jni, j_ice_regather_interval_range)) {
+    int min = jni->CallIntMethod(j_ice_regather_interval_range, get_min_id);
+    int max = jni->CallIntMethod(j_ice_regather_interval_range, get_max_id);
+    rtc_config->ice_regather_interval_range.emplace(min, max);
+  }
+}
+
+void JavaToNativeRtpParameters(JNIEnv* jni,
+                               jobject j_parameters,
+                               webrtc::RtpParameters* parameters) {
+  RTC_CHECK(parameters != nullptr);
+  jclass parameters_class = jni->FindClass("org/webrtc/RtpParameters");
+  jfieldID encodings_id =
+      GetFieldID(jni, parameters_class, "encodings", "Ljava/util/LinkedList;");
+  jfieldID codecs_id =
+      GetFieldID(jni, parameters_class, "codecs", "Ljava/util/LinkedList;");
+
+  // Convert encodings.
+  jobject j_encodings = GetObjectField(jni, j_parameters, encodings_id);
+  jclass j_encoding_parameters_class =
+      jni->FindClass("org/webrtc/RtpParameters$Encoding");
+  jfieldID active_id =
+      GetFieldID(jni, j_encoding_parameters_class, "active", "Z");
+  jfieldID bitrate_id = GetFieldID(jni, j_encoding_parameters_class,
+                                   "maxBitrateBps", "Ljava/lang/Integer;");
+  jfieldID ssrc_id =
+      GetFieldID(jni, j_encoding_parameters_class, "ssrc", "Ljava/lang/Long;");
+  jclass j_integer_class = jni->FindClass("java/lang/Integer");
+  jclass j_long_class = jni->FindClass("java/lang/Long");
+  jmethodID int_value_id = GetMethodID(jni, j_integer_class, "intValue", "()I");
+  jmethodID long_value_id = GetMethodID(jni, j_long_class, "longValue", "()J");
+
+  for (jobject j_encoding_parameters : Iterable(jni, j_encodings)) {
+    webrtc::RtpEncodingParameters encoding;
+    encoding.active = GetBooleanField(jni, j_encoding_parameters, active_id);
+    jobject j_bitrate =
+        GetNullableObjectField(jni, j_encoding_parameters, bitrate_id);
+    if (!IsNull(jni, j_bitrate)) {
+      int bitrate_value = jni->CallIntMethod(j_bitrate, int_value_id);
+      CHECK_EXCEPTION(jni) << "error during CallIntMethod";
+      encoding.max_bitrate_bps = rtc::Optional<int>(bitrate_value);
+    }
+    jobject j_ssrc =
+        GetNullableObjectField(jni, j_encoding_parameters, ssrc_id);
+    if (!IsNull(jni, j_ssrc)) {
+      jlong ssrc_value = jni->CallLongMethod(j_ssrc, long_value_id);
+      CHECK_EXCEPTION(jni) << "error during CallLongMethod";
+      encoding.ssrc = rtc::Optional<uint32_t>(ssrc_value);
+    }
+    parameters->encodings.push_back(encoding);
+  }
+
+  // Convert codecs.
+  jobject j_codecs = GetObjectField(jni, j_parameters, codecs_id);
+  jclass codec_class = jni->FindClass("org/webrtc/RtpParameters$Codec");
+  jfieldID payload_type_id = GetFieldID(jni, codec_class, "payloadType", "I");
+  jfieldID name_id = GetFieldID(jni, codec_class, "name", "Ljava/lang/String;");
+  jfieldID kind_id = GetFieldID(jni, codec_class, "kind",
+                                "Lorg/webrtc/MediaStreamTrack$MediaType;");
+  jfieldID clock_rate_id =
+      GetFieldID(jni, codec_class, "clockRate", "Ljava/lang/Integer;");
+  jfieldID num_channels_id =
+      GetFieldID(jni, codec_class, "numChannels", "Ljava/lang/Integer;");
+
+  for (jobject j_codec : Iterable(jni, j_codecs)) {
+    webrtc::RtpCodecParameters codec;
+    codec.payload_type = GetIntField(jni, j_codec, payload_type_id);
+    codec.name = JavaToStdString(jni, GetStringField(jni, j_codec, name_id));
+    codec.kind =
+        JavaToNativeMediaType(jni, GetObjectField(jni, j_codec, kind_id));
+    jobject j_clock_rate = GetNullableObjectField(jni, j_codec, clock_rate_id);
+    if (!IsNull(jni, j_clock_rate)) {
+      int clock_rate_value = jni->CallIntMethod(j_clock_rate, int_value_id);
+      CHECK_EXCEPTION(jni) << "error during CallIntMethod";
+      codec.clock_rate = rtc::Optional<int>(clock_rate_value);
+    }
+    jobject j_num_channels =
+        GetNullableObjectField(jni, j_codec, num_channels_id);
+    if (!IsNull(jni, j_num_channels)) {
+      int num_channels_value = jni->CallIntMethod(j_num_channels, int_value_id);
+      CHECK_EXCEPTION(jni) << "error during CallIntMethod";
+      codec.num_channels = rtc::Optional<int>(num_channels_value);
+    }
+    parameters->codecs.push_back(codec);
+  }
+}
+
+jobject NativeToJavaRtpParameters(JNIEnv* jni,
+                                  const webrtc::RtpParameters& parameters) {
+  jclass parameters_class = jni->FindClass("org/webrtc/RtpParameters");
+  jmethodID parameters_ctor =
+      GetMethodID(jni, parameters_class, "<init>", "()V");
+  jobject j_parameters = jni->NewObject(parameters_class, parameters_ctor);
+  CHECK_EXCEPTION(jni) << "error during NewObject";
+
+  // Add encodings.
+  jclass encoding_class = jni->FindClass("org/webrtc/RtpParameters$Encoding");
+  jmethodID encoding_ctor = GetMethodID(jni, encoding_class, "<init>", "()V");
+  jfieldID encodings_id =
+      GetFieldID(jni, parameters_class, "encodings", "Ljava/util/LinkedList;");
+  jobject j_encodings = GetObjectField(jni, j_parameters, encodings_id);
+  jmethodID encodings_add = GetMethodID(jni, GetObjectClass(jni, j_encodings),
+                                        "add", "(Ljava/lang/Object;)Z");
+  jfieldID active_id = GetFieldID(jni, encoding_class, "active", "Z");
+  jfieldID bitrate_id =
+      GetFieldID(jni, encoding_class, "maxBitrateBps", "Ljava/lang/Integer;");
+  jfieldID ssrc_id =
+      GetFieldID(jni, encoding_class, "ssrc", "Ljava/lang/Long;");
+
+  jclass integer_class = jni->FindClass("java/lang/Integer");
+  jclass long_class = jni->FindClass("java/lang/Long");
+  jmethodID integer_ctor = GetMethodID(jni, integer_class, "<init>", "(I)V");
+  jmethodID long_ctor = GetMethodID(jni, long_class, "<init>", "(J)V");
+
+  for (const webrtc::RtpEncodingParameters& encoding : parameters.encodings) {
+    jobject j_encoding_parameters =
+        jni->NewObject(encoding_class, encoding_ctor);
+    CHECK_EXCEPTION(jni) << "error during NewObject";
+    jni->SetBooleanField(j_encoding_parameters, active_id, encoding.active);
+    CHECK_EXCEPTION(jni) << "error during SetBooleanField";
+    if (encoding.max_bitrate_bps) {
+      jobject j_bitrate_value = jni->NewObject(integer_class, integer_ctor,
+                                               *(encoding.max_bitrate_bps));
+      CHECK_EXCEPTION(jni) << "error during NewObject";
+      jni->SetObjectField(j_encoding_parameters, bitrate_id, j_bitrate_value);
+      CHECK_EXCEPTION(jni) << "error during SetObjectField";
+    }
+    if (encoding.ssrc) {
+      jobject j_ssrc_value = jni->NewObject(long_class, long_ctor,
+                                            static_cast<jlong>(*encoding.ssrc));
+      CHECK_EXCEPTION(jni) << "error during NewObject";
+      jni->SetObjectField(j_encoding_parameters, ssrc_id, j_ssrc_value);
+      CHECK_EXCEPTION(jni) << "error during SetObjectField";
+    }
+    jboolean added = jni->CallBooleanMethod(j_encodings, encodings_add,
+                                            j_encoding_parameters);
+    CHECK_EXCEPTION(jni) << "error during CallBooleanMethod";
+    RTC_CHECK(added);
+  }
+
+  // Add codecs.
+  jclass codec_class = jni->FindClass("org/webrtc/RtpParameters$Codec");
+  jmethodID codec_ctor = GetMethodID(jni, codec_class, "<init>", "()V");
+  jfieldID codecs_id =
+      GetFieldID(jni, parameters_class, "codecs", "Ljava/util/LinkedList;");
+  jobject j_codecs = GetObjectField(jni, j_parameters, codecs_id);
+  jmethodID codecs_add = GetMethodID(jni, GetObjectClass(jni, j_codecs), "add",
+                                     "(Ljava/lang/Object;)Z");
+  jfieldID payload_type_id = GetFieldID(jni, codec_class, "payloadType", "I");
+  jfieldID name_id = GetFieldID(jni, codec_class, "name", "Ljava/lang/String;");
+  jfieldID kind_id = GetFieldID(jni, codec_class, "kind",
+                                "Lorg/webrtc/MediaStreamTrack$MediaType;");
+  jfieldID clock_rate_id =
+      GetFieldID(jni, codec_class, "clockRate", "Ljava/lang/Integer;");
+  jfieldID num_channels_id =
+      GetFieldID(jni, codec_class, "numChannels", "Ljava/lang/Integer;");
+
+  for (const webrtc::RtpCodecParameters& codec : parameters.codecs) {
+    jobject j_codec = jni->NewObject(codec_class, codec_ctor);
+    CHECK_EXCEPTION(jni) << "error during NewObject";
+    jni->SetIntField(j_codec, payload_type_id, codec.payload_type);
+    CHECK_EXCEPTION(jni) << "error during SetIntField";
+    jni->SetObjectField(j_codec, name_id,
+                        JavaStringFromStdString(jni, codec.name));
+    CHECK_EXCEPTION(jni) << "error during SetObjectField";
+    jni->SetObjectField(j_codec, kind_id,
+                        NativeToJavaMediaType(jni, codec.kind));
+    CHECK_EXCEPTION(jni) << "error during SetObjectField";
+    if (codec.clock_rate) {
+      jobject j_clock_rate_value =
+          jni->NewObject(integer_class, integer_ctor, *(codec.clock_rate));
+      CHECK_EXCEPTION(jni) << "error during NewObject";
+      jni->SetObjectField(j_codec, clock_rate_id, j_clock_rate_value);
+      CHECK_EXCEPTION(jni) << "error during SetObjectField";
+    }
+    if (codec.num_channels) {
+      jobject j_num_channels_value =
+          jni->NewObject(integer_class, integer_ctor, *(codec.num_channels));
+      CHECK_EXCEPTION(jni) << "error during NewObject";
+      jni->SetObjectField(j_codec, num_channels_id, j_num_channels_value);
+      CHECK_EXCEPTION(jni) << "error during SetObjectField";
+    }
+    jboolean added = jni->CallBooleanMethod(j_codecs, codecs_add, j_codec);
+    CHECK_EXCEPTION(jni) << "error during CallBooleanMethod";
+    RTC_CHECK(added);
+  }
+
+  return j_parameters;
+}
+
+}  // namespace webrtc_jni