opposite action to g_signal_connect ??

[Sebastian Dröge]

On Mo, 2013-12-02 at 00:23 -0800, pavel wrote:
> Thank you,
> 
> in my code:
> -----------------------------------
> printf("(%s) \t Removing signal %d from \"%s\"...\n", __func__,
> data->appsrc_handler_id, GST_OBJECT_NAME(peer));
> g_signal_handler_disconnect(peer, data->appsrc_handler_id);
> 
> printf("(%s) \t Disconnecting \"%s\" -|- \"%s\"...\n", __func__,
> GST_OBJECT_NAME(peer), GST_OBJECT_NAME(downstream_peer));
>                 
> gst_element_unlink(peer, downstream_peer);
> 
> printf("%s) \t \"%s\" <-- GST_STATE_NULL...\n", __func__,
> GST_OBJECT_NAME(peer));
> gst_element_set_state(peer, GST_STATE_NULL);
> 
> printf("(%s) \t Removing \"%s\"...\n", __func__, GST_OBJECT_NAME(peer));
> gst_bin_remove(GST_BIN(data->pipeline), peer)
> -----------------------------------
> 
> I'm receiving:
> -----------------------------------
> 00:00:31:       Removing app_src...                                                          
> 00:00:31:       Removing signal 274 from "app_src"...                                    
> 00:00:31:       Disconnecting "app_src" -|- "decoder_queue"...                           
> 00:00:31:       "app_src" <-- GST_STATE_NULL...                                          
> 00:00:31: WARNING:      (cb_need_data)  quit, "push-buffer" failed.                                                                     
> Stopping playback                                                                                                         
> 00:00:31:       Remove "app_src"...                                                      
> -----------------------------------
> 
> So, after I remove the handler, and set NULL state to the appsrc, the
> handler is still getting called.

Do you connect to need-data and enough-data, and only store one of the
return values? Please also show the code where you connect the signals
and store the signal handler IDs.

Also there could be a race condition here. If the source is still
running, it could be inside the signal handler already when you
disconnect it.

-- 
Sebastian Dröge <sebastian at centricular.com>
Centricular Ltd - http://www.centricular.com
Expertise, Straight from the Source
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