[移动开发] androidstudio android 使用webrtc的错误汇集

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[移动开发]androidstudio android 使用webrtc的错误汇集

1、

org.webrtc.examples.androidnativeapi E/rtc: #
? ? # Fatal error in: I:\webrtc\android\androidnativeapi\app\src\main\cpp\androidcallclient.cc, line 182
? ? # last system error: 2
? ? # Check failed: (&thread_checker_)->IsCurrent()
? ? #?
2021-08-03 16:28:43.573 24948-24948/org.webrtc.examples.androidnativeapi A/libc: Fatal signal 6 (SIGABRT), code -6 (SI_TKILL) in tid 24948 (ndroidnativeapi), pid 24948 (ndroidnativeapi)

解决办法：是因为界面直接调用jni native函数导致，需要在主线程调用

handler.post(() -> {

? nativeConnectToPeer(nativeClient,peerid);
});

2、

最近封装janus的websocket信令，发现CreateOffer后OnSuccess无法正常回调，查资料后发现，是因为创建PeerConnectionFactory时，传入的信令线程为空指针，如下：

bool Conductor::InitializePeerConnection() {
  RTC_DCHECK(!peer_connection_factory_);
  RTC_DCHECK(!peer_connection_);
 
  peer_connection_factory_ = webrtc::CreatePeerConnectionFactory(
      nullptr /* network_thread */, nullptr /* worker_thread */,
      nullptr /* signaling_thread */, nullptr /* default_adm */,
      webrtc::CreateBuiltinAudioEncoderFactory(),
      webrtc::CreateBuiltinAudioDecoderFactory(),
      webrtc::CreateBuiltinVideoEncoderFactory(),
      webrtc::CreateBuiltinVideoDecoderFactory(), nullptr /* audio_mixer */,
      nullptr /* audio_processing */);
 
  if (!peer_connection_factory_) {
    main_wnd_->MessageBox("Error", "Failed to initialize PeerConnectionFactory",
                          true);
    DeletePeerConnection();
    return false;
  }
 
  if (!CreatePeerConnection(/*dtls=*/true)) {
    main_wnd_->MessageBox("Error", "CreatePeerConnection failed", true);
    DeletePeerConnection();
  }
 
  AddTracks();
 
  return peer_connection_ != nullptr;
}

方法一：

把当前线程传到CreatePeerConnectionFactory工厂类

	rtc::Thread *currentThread = rtc::Thread::Current();
	if (!peer_connection_factory_) {
		peer_connection_factory_ = webrtc::CreatePeerConnectionFactory(
			nullptr /* network_thread */, nullptr /* worker_thread */,
			currentThread /* signaling_thread */, nullptr /* default_adm */,
			webrtc::CreateBuiltinAudioEncoderFactory(),
			webrtc::CreateBuiltinAudioDecoderFactory(),
			webrtc::CreateBuiltinVideoEncoderFactory(),
			webrtc::CreateBuiltinVideoDecoderFactory(), nullptr /* audio_mixer */,
			nullptr /* audio_processing */);
	}

方法二：

创建网络，工作，信令三种线程传到CreatePeerConnectionFactory工厂类

network_thread_ = rtc::Thread::CreateWithSocketServer();
	network_thread_->SetName("network_thread", nullptr);
	RTC_CHECK(network_thread_->Start()) << "Failed to start thread";
 
	worker_thread_ = rtc::Thread::Create();
	worker_thread_->SetName("worker_thread", nullptr);
	RTC_CHECK(worker_thread_->Start()) << "Failed to start thread";
 
	signaling_thread_ = rtc::Thread::Create();
	signaling_thread_->SetName("signaling_thread", nullptr);
	RTC_CHECK(signaling_thread_->Start()) << "Failed to start thread";
pcf_ = webrtc::CreatePeerConnectionFactory(
		network_thread_.get(),
		worker_thread_.get(),
		signaling_thread_.get(),
		adm_,
		webrtc::CreateBuiltinAudioEncoderFactory(),
		webrtc::CreateBuiltinAudioDecoderFactory(),
		webrtc::CreateBuiltinVideoEncoderFactory(),
		webrtc::CreateBuiltinVideoDecoderFactory(),
		nullptr /*audio_mixer*/,
		nullptr /*audio_processing*/);
 
	if (!pcf_)
	{
		MSC_THROW_ERROR("error ocurred creating peerconnection factory");
	}

3、rtc::Thread*currentThread = rtc::Thread::Current() //currentThread=null;

必须先

rtc::ThreadManager::Instance()->WrapCurrentThread();

rtc::Thread*currentThread = rtc::Thread::Current();

4、

undefined reference to `typeinfo for rtc::LogSink'
?
undefined reference to `typeinfo for webrtc::VideoTrackSource

解决办法

开始以为就是符号找不到，怎么改都无果。而且报的都是类型未定义，不是具体方法未定义，都发生在类继承的时候。后发现是webrtc编译关了rtti，打开即可：

gn gen out/mybuild-m74 --args='is_debug=false is_component_build=false is_clang=false rtc_include_tests=false rtc_use_h264=true rtc_enable_protobuf=false use_rtti=true use_custom_libcxx=false treat_warnings_as_errors=false use_ozone=true'

5、

2022-02-18 14:49:31.484 17400-17694/org.webrtc.examples.androidnativeapi E/rtc: #
    # Fatal error in: ../../modules/utility/source/jvm_android.cc, line 245
    # last system error: 30
    # Check failed: g_jvm
    #

原因

jvm未初始化

解决方法，调用webrtc::JVM::Initialize，代码如下：

extern "C" jint JNIEXPORT JNICALL JNI_OnLoad(JavaVM* jvm, void* reserved) {
  webrtc::InitAndroid(jvm);
  webrtc::JVM::Initialize(jvm);
  RTC_CHECK(rtc::InitializeSSL()) << "Failed to InitializeSSL()";
  return JNI_VERSION_1_6;
}
 
extern "C" void JNIEXPORT JNICALL JNI_OnUnload(JavaVM* jvm, void* reserved) {
  RTC_CHECK(rtc::CleanupSSL()) << "Failed to CleanupSSL()";
}
 
}  // namespace webrtc_examples

6、

Program received signal SIGILL, Illegal instruction.
0x7956a3a8 in _armv7_tick () from /home/leith/dev/mapbox-gl-native-mason/build/android/out/Debug/lib.target/libmapbox-gl.so
(gdb) bt
#0  0x7956a3a8 in _armv7_tick () from /home/leith/dev/mapbox-gl-native-mason/build/android/out/Debug/lib.target/libmapbox-gl.so
#1  0x795d1ccc in OPENSSL_cpuid_setup () from /home/leith/dev/mapbox-gl-native-mason/build/android/out/Debug/lib.target/libmapbox-gl.so
#2  0x400bd9c6 in ?? () from /home/leith/dev/android/linker
#3  0x400bda9e in ?? () from /home/leith/dev/android/linker
#4  0x400bdbf0 in ?? () from /home/leith/dev/android/linker
#5  0x400bdc6e in ?? () from /home/leith/dev/android/linker
#6  0x400bc1a6 in _start () from /home/leith/dev/android/linker
#7  0x41643c86 in dvmLoadNativeCode(char const*, Object*, char**) () from /home/leith/dev/android/system_lib/libdvm.so
#8  0x416600f4 in ?? () from /home/leith/dev/android/system_lib/libdvm.so
#9  0x41613ee8 in dvmJitToInterpNoChain () from /home/leith/dev/android/system_lib/libdvm.so
#10 0x41613ee8 in dvmJitToInterpNoChain () from /home/leith/dev/android/system_lib/libdvm.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

一、按F9直接忽略继续

二、在androidstudio中设置

process handle --pass true --stop false --notify true SIGILL

?7、

/home/test/workspace/testwebrtc/Debug/../src/testwebrtc.cpp:22: undefined reference to `webrtc::CreateSessionDescription(std::string const&, std::string const&, webrtc::SdpParseError*)'
/home/test/workspace/testwebrtc/Debug/../src/testwebrtc.cpp:24: undefined reference to `rtc::FatalMessage::FatalMessage(char const*, int, std::string*)'
/home/test/workspace/testwebrtc/Debug/../src/testwebrtc.cpp:25: undefined reference to `rtc::FatalMessage::FatalMessage(char const*, int, std::string*)'
./src/testwebrtc.o: In function `rtc::CheckEqImpl(int, int, char const*)':
makefile:45: recipe for target 'testwebrtc' failed
/home/test/webrtc-checkout-ankur/src/out_release_62/include/webrtc/rtc_base/checks.h:176: undefined reference to `std::string* rtc::MakeCheckOpString<int, int>(int const&, int const&, char const*)'
./src/testwebrtc.o: In function `rtc::CheckLtImpl(int, int, char const*)':
/home/test/webrtc-checkout-ankur/src/out_release_62/include/webrtc/rtc_base/checks.h:179: undefined reference to `std::string* rtc::MakeCheckOpString<int, int>(int const&, int const&, char const*)'
collect2: error: ld returned 1 exit status

解决办法，webrtc编译参数加上

use_custom_libcxx=false

8、

Signal: SIGTRAP (signal SIGTRAP)

在jni开发时，调试时遇到Signal: SIGTRAP (signal SIGTRAP)导致程序老是卡在某几个语句，无法正常调试。
后来发现是由于，我的jni借口函数返回值为bool，而我在程序中为加入return 语句，即函数执行完毕后不能确定一定有true/false结果返回，修改后即可正常调试。
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