WebRTC built for iOS. How to integrate into Xcode project

[you...@gmail.com]

Hi,

I have recently tried to update to the latest trunk (to be precise rev. 8059 from 6700) and now I am struggling to integrate WebRTC in my app.

I have followed instructions here http://www.webrtc.org/native-code/ios and was able to build AppRTCDemo app along with all the libraries it needs. I was also able to run it on device. I did it for armv7.
After that I inspected AppRTCDemo target in .gyp file and tried to add libjingle_peerconnection_objc.a and libjingle_peerconnection.a to my app. This approach failed on linking step.
Then I added all the necessary libraries from out_ios/Debug-iphoneos to my project and was finally able to build my app.

Now I get crashes like this:

* thread #9: tid = 0xb3085, 0x01000000 MyApp, stop reason = EXC_BAD_ACCESS (code=2, address=0x1000000)
    frame #0: 0x01000000 MyApp
  * frame #1: 0x007652d0 MyApp`rtc::MessageQueue::Get(this=0x1558f370, pmsg=0x048eaf5c, cmsWait=-1, process_io=true) + 1392 at messagequeue.cc:253
    frame #2: 0x007930e4 MyApp`rtc::Thread::ProcessMessages(this=0x1558f370, cmsLoop=-1) + 116 at thread.cc:562
    frame #3: 0x00793052 MyApp`rtc::Thread::Run(this=0x1558f370) + 34 at thread.cc:404
    frame #4: 0x00792ea6 MyApp`rtc::Thread::PreRun(pv=0x15586f20) + 90 at thread.cc:396
    frame #5: 0x2f997e92 libsystem_pthread.dylib`_pthread_body + 138
    frame #6: 0x2f997e06 libsystem_pthread.dylib`_pthread_start + 118

when I try to create thread like this from main thread:
    rtc::Thread *myWorkerThread = new rtc::Thread();
    myWorkerThread->SetName("My_worker_thread", myWorkerThread);
    myWorkerThread->Start();

I am not sure if this happens because of some problems in my app or in how I add webrtc to my project or the way I have built webrtc.

Could anyone please share how you work with new releases (>6700) of WebRTC on iOS? Do you manually add built all static libs into project (build phases -> link binary with libraries) or there is a way to create an umbrella library and add only that to project? Did someone have the same problems like I do?

[RTC.Blacker]

have you test AppRTCDemo, is it ok?

[you...@gmail.com]

Yes. AppRTCDemo works fine. I have built it using instructions for Xcode. I can connect to server and see video on both desktop and iPhone. I have built it fro armv7.

[you...@gmail.com]

I have just tried to build my project using the clang shipped with WebRTC. I still get the same crashes. Please see image attached.
I am not sure if I should file a bug to WebRTC issues tracker since it works fine with AppRTCDemo app.

I would appreciate any help on this issue.

[you...@gmail.com]

Ok, I am a bit desperate now.
I have spent the whole day today trying to make it work:
0. I have made a test project which just creates thread in AppDelegate in applicationDidFinishLaunching:withOptions: (attached without libs and webrtc) in case my project introduces side effects.
1. I have tried building test app with compiler downloaded with WebRTC.
2. I have tried to build WebRTC with clang from Xcode.
3. I have tried to setup Xcode project to have all the same compiler flags as WebRTC does.

None of this works. I still crash mostly in the same place.

At this point in time it seems to me that there is some stupid mistake somewhere or I am missing something obvious.

[Zeke Chin]

Can you try with HEAD @ 8104?

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[you...@gmail.com]

I found the issue yesterday.
I wrote a comment to the issue 4202 in tracker https://code.google.com/p/webrtc/issues/detail?id=4202

The problem was in _DEBUG macro which I didn't add to my project. Because of this macro I was creating rtc::Thread object which was 4 bytes smaller than the one from library which was messing up memory.

I believe it might be a good idea to make some kind of export settings and headers script or at least readme file for WebRTC in order to avoid similar issues in future.

[Zeke Chin]

Cool, glad solution was discovered.

[you...@gmail.com]

Yeah, it took quite some man-hours.

BTW, thanks for taking a look.

[studyro zhang]

The issue just happened to me. It would take me forever to find the key point. Thank you for sharing your solution.

On Saturday, January 17, 2015 at 1:29:16 AM UTC+8, you...@gmail.com wrote:

[Brandon Tyler]

Hello!  Would you mind explaining how you added this debug macro to your project?  I read your other post, but I'm still unclear as to how or where I should add this.  I'm getting a weird threading crash as well that begins in a thread inside the critical section.  I would be so appreciative if you could explain where and what to add to the debug macro.

[kthel...@webrtc.org]

Brandon, this thread is several years old and information in it is likely to be very out of date. Please file a bug over at https://bugs.chromium.org/p/webrtc/issues/list or start a new thread and describe your issue in detail. Thanks!