[FFmpeg-trac] #5615(avformat:new): avformat_open_input on dead UDP source link hangs after interrupt_callback signaled exit

[FFmpeg]

#5615: avformat_open_input on dead UDP source link hangs after interrupt_callback
signaled exit
-------------------------------------+-------------------------------------
             Reporter:  Marlon       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avformat     |                  Version:  git-
             Keywords:  udp open     |  master
  callback hang                      |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Udp source is not active.
 After returning 1 from interrupt_callback (exit), avformat_open_input does
 not return.

 Using Win32 dll from Zeranoe on W10 64bit, Microsoft compiler

 2015-05-22 Working
 https://ffmpeg.zeranoe.com/builds/win32/shared/ffmpeg-20160522-git-
 566be4f-win32-shared.7z

 2015-05-25 Not working
 https://ffmpeg.zeranoe.com/builds/win32/shared/ffmpeg-20160525-git-
 9591ca7-win32-shared.7z

 How to reproduce:
 GetTickCount used can be any time function returning miliseconds.
 {{{
 unsigned long TimePrev=0;
 //callback
 static int cb_open(void *ctx)
 {
  //timeout after 3 seconds
  if(GetTickCount() - TimePrev > 3000)
   {
    printf("---interrupt_cb: Exit\n");
    return 1;
   }
  return 0;
 }


 void main()
 {
  avformat_network_init();
  AVFormatContext *pFmtCtx = avformat_alloc_context();
  pFmtCtx->interrupt_callback.callback = cb_open;
  pFmtCtx->interrupt_callback.opaque = 0;

  const char *url="udp://127.0.0.1:8000";
  printf("avformat_open_input %s\n", url);
  TimePrev=GetTickCount();
  int nRet=avformat_open_input(&pFmtCtx, url, NULL, NULL);
  //here never called

 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/5615>
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