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realvideodec element blocked when close_library (in transition of NULL to READY), why?

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wuzw
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realvideodec element blocked when close_library (in transition of NULL to READY), why?

wuzw
hi all:
    I wrote my gst app which used realvideodec element like this( ignored some non-significant code):
 
main()
{
    ........
    pthread_creat(&my_thread, null, create_pipe_func, null);
 
    while(1)
    {
        c = getchar();
 
        if(c = 'b')
        {
            sleep(10);
        }
    }
   
}
 
create_pipe_func()
{
     loop = g_main_loop_new(null, false);
     pipeline = _create_pipeline();//make all element and link them, set pad-added callback for delayed link to realvideodec sink pad
     gst_element_set_state(pipeline, GST_STATE_PLAYING);
 
     g_mainn_loop_run(loop);
}
 
my pipeline is like this:
filesrc --> rmdemux --> realvideodec --> fakesink
 
my problem is:
 
I use the app to play rv4 file, and stream thread blocked on close_library().
gst log like this(sorry, I can not copy and paste for some reason, so i type some significant logs):
------------------------------------------------------------------------------------------------
gstelement.c:2496:gst_element_set_state_func:<realvideodec0> final: set state from NULL to READY
gstrealvideodec.c:456:open_library:<realvideodec0> Attempting to open shared library for real video version 2
....
gstrealvideodec.c:557:close_library:<realvideodec0> closing library module
gstrealvideodec.c:456:open_library:<realvideodec0> Attempting to open shared library for real video version 3
....
gstrealvideodec.c:557:close_library:<realvideodec0> closing library module
------------------------------------------------------------------------------------------------
 
no more things logged. I added some print to glib source code and found that dlclose() blocked.
 
if  i input 'b' now , stream tread unblocked and went on correctly.
 
 
 
 
If my code like :
main()
{
    ........
    create_pipe_func();
 
       
}
 
create_pipe_func()
{
     loop = g_main_loop_new(null, false);
     pipeline = _create_pipeline();//make all element and link them, set pad-added callback for delayed link to realvideodec sink pad
     gst_element_set_state(pipeline, GST_STATE_PLAYING);
 
     g_mainn_loop_run(loop);
}
 
every thing is ok.
why?
 
 
 
 
 
 
 
 
 
 
 
 

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Lukas Ruetz
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Re: realvideodec element blocked when close_library (in transition of NULL to READY), why?

Lukas Ruetz
Hi,

Am Donnerstag, den 19.11.2009, 17:44 +0800 schrieb wuzw:

> hi all:
>     I wrote my gst app which used realvideodec element like
> this( ignored some non-significant code):
>  
> main()
> {
>     ........
>     pthread_creat(&my_thread, null, create_pipe_func, null);
>  
>     while(1)
>     {
>         c = getchar();
>  
>         if(c = 'b')
>         {
>             sleep(10);
>         }
>     }
>    
> }
>  
> create_pipe_func()
> {
>      loop = g_main_loop_new(null, false);
>      pipeline = _create_pipeline();//make all element and link them,
> set pad-added callback for delayed link to realvideodec sink pad
>      gst_element_set_state(pipeline, GST_STATE_PLAYING);
>  
>      g_mainn_loop_run(loop);
> }
>  
> my pipeline is like this:
> filesrc --> rmdemux --> realvideodec --> fakesink
>  
> my problem is:
>  
> I use the app to play rv4 file, and stream thread blocked on
> close_library().
> gst log like this(sorry, I can not copy and paste for some reason, so
> i type some significant logs):
> ------------------------------------------------------------------------------------------------
> gstelement.c:2496:gst_element_set_state_func:<realvideodec0> final:
> set state from NULL to READY
> gstrealvideodec.c:456:open_library:<realvideodec0> Attempting to open
> shared library for real video version 2
> ....
> gstrealvideodec.c:557:close_library:<realvideodec0> closing library
> module
> gstrealvideodec.c:456:open_library:<realvideodec0> Attempting to open
> shared library for real video version 3
> ....
> gstrealvideodec.c:557:close_library:<realvideodec0> closing library
> module
> ------------------------------------------------------------------------------------------------
>  
> no more things logged. I added some print to glib source code and
> found that dlclose() blocked.
>  
> if  i input 'b' now , stream tread unblocked and went on correctly.
>  
>  
>  
>  
> If my code like :
> main()
> {
>     ........
>     create_pipe_func();
>  
>        
> }
>  
> create_pipe_func()
> {
>      loop = g_main_loop_new(null, false);
>      pipeline = _create_pipeline();//make all element and link them,
> set pad-added callback for delayed link to realvideodec sink pad
>      gst_element_set_state(pipeline, GST_STATE_PLAYING);
>  
>      g_mainn_loop_run(loop);
> }
>  
> every thing is ok.
> why?
>  

Have you initialized glib-threading?

main () {
  ...
  g_thread_init( NULL );
  gst_init( &argc, &argv );
  ...
}

Maybe it's safer to use the glib threading functions - at least it works
for me.

lukas



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wuzw
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Re: realvideodec element blocked when close_library (in transition of NULL to READY), why?

wuzw

----- Original Message -----
From: "Lukas Ruetz" <[hidden email]>
To: "Discussion of the development of GStreamer" <[hidden email]>
Sent: Thursday, November 19, 2009 6:56 PM
Subject: Re: [gst-devel] realvideodec element blocked when close_library (in transition of NULL to READY), why?


> Hi,
>
> Am Donnerstag, den 19.11.2009, 17:44 +0800 schrieb wuzw:
> > hi all:
> >     I wrote my gst app which used realvideodec element like
> > this( ignored some non-significant code):
> >  
> > main()
> > {
> >     ........
> >     pthread_creat(&my_thread, null, create_pipe_func, null);
> >  
> >     while(1)
> >     {
> >         c = getchar();
> >  
> >         if(c = 'b')
> >         {
> >             sleep(10);
> >         }
> >     }
> >    
> > }
> >  
> > create_pipe_func()
> > {
> >      loop = g_main_loop_new(null, false);
> >      pipeline = _create_pipeline();//make all element and link them,
> > set pad-added callback for delayed link to realvideodec sink pad
> >      gst_element_set_state(pipeline, GST_STATE_PLAYING);
> >  
> >      g_mainn_loop_run(loop);
> > }
> >  
> > my pipeline is like this:
> > filesrc --> rmdemux --> realvideodec --> fakesink
> >  
> > my problem is:
> >  
> > I use the app to play rv4 file, and stream thread blocked on
> > close_library().
> > gst log like this(sorry, I can not copy and paste for some reason, so
> > i type some significant logs):
> > ------------------------------------------------------------------------------------------------
> > gstelement.c:2496:gst_element_set_state_func:<realvideodec0> final:
> > set state from NULL to READY
> > gstrealvideodec.c:456:open_library:<realvideodec0> Attempting to open
> > shared library for real video version 2
> > ....
> > gstrealvideodec.c:557:close_library:<realvideodec0> closing library
> > module
> > gstrealvideodec.c:456:open_library:<realvideodec0> Attempting to open
> > shared library for real video version 3
> > ....
> > gstrealvideodec.c:557:close_library:<realvideodec0> closing library
> > module
> > ------------------------------------------------------------------------------------------------
> >  
> > no more things logged. I added some print to glib source code and
> > found that dlclose() blocked.
> >  
> > if  i input 'b' now , stream tread unblocked and went on correctly.
> >  
> >  
> >  
> >  
> > If my code like :
> > main()
> > {
> >     ........
> >     create_pipe_func();
> >  
> >        
> > }
> >  
> > create_pipe_func()
> > {
> >      loop = g_main_loop_new(null, false);
> >      pipeline = _create_pipeline();//make all element and link them,
> > set pad-added callback for delayed link to realvideodec sink pad
> >      gst_element_set_state(pipeline, GST_STATE_PLAYING);
> >  
> >      g_mainn_loop_run(loop);
> > }
> >  
> > every thing is ok.
> > why?
> >  
>
> Have you initialized glib-threading?
>
> main () {
>   ...
>   g_thread_init( NULL );
>   gst_init( &argc, &argv );
>   ...
> }
>
> Maybe it's safer to use the glib threading functions - at least it works
> for me.
>
> lukas
>
>
>
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> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
> trial. Simplify your report design, integration and deployment - and focus on
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
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> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>


new code like this:
 main () {
   ...
   g_thread_init( NULL );
   gst_init( &argc, &argv );
   g_thread = g_tread_create(create_pipeline_func, null, true, &error);
   ...
 }


% export GST_DEBUG_LEVEL=4
% ./tmp.x
log :
GST_PLUGIN_LOADING gstpluginfeature.c:105:gst_plugin_feature_load : loading plugin for feature 0x80ca090; 'pipelinet'
*** glic-detected***  tmp.x : double free or corruption (out): 0x08161958 ***


% export GST_DEBUG_LEVEL=5
% ./tmp.x
log (the same as previously happened):
gstelement.c:2496:gst_element_set_state_func:<realvideodec0> final:
 set state from NULL to READY
 gstrealvideodec.c:456:open_library:<realvideodec0> Attempting to open
shared library for real video version 2
 ....
 gstrealvideodec.c:557:close_library:<realvideodec0> closing library
 module
 gstrealvideodec.c:456:open_library:<realvideodec0> Attempting to open
 shared library for real video version 3
 ....
 gstrealvideodec.c:557:close_library:<realvideodec0> closing library
 module
 ------------------------------------------------------------------------------------------------
 no more things logged. I added some print to glib source code and
 found that dlclose() blocked.






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