Remove control source after fade in?

[Olivier Crête]

Hi,
Yes, the control source will always override manually set properties before they are used. If you want to set it manually, you have to remove the control binding with gst_object_remove_control_binding(), you can retrive it with gst_object_get_control_binding()
Olivier
On Mon, 2019-05-13 at 15:09 +0000, Weber, Holger wrote:
> Hi,
>  
> I use a control source to fade in an audio stream when my pipeline is started.
> The fade in works as expected (see code).
>  
>         GstControlSource* pCtrlSource = gst_interpolation_control_source_new();
>         g_object_set(pCtrlSource, "mode", GST_INTERPOLATION_MODE_LINEAR, NULL);
>         gst_object_add_control_binding(GST_OBJECT_CAST(m_pElVolume), gst_direct_control_binding_new(GST_OBJECT_CAST(m_pElVolume), "volume", pCtrlSource));
>         GstTimedValueControlSource *tv_csource = (GstTimedValueControlSource *) pCtrlSource;
>         gst_timed_value_control_source_set(tv_csource, 0 * GST_MSECOND, 0.0);
>         gst_timed_value_control_source_set(tv_csource, iFadeInMs * GST_MSECOND, 0.0);
>         gst_timed_value_control_source_set(tv_csource, (iFadeInMs + iFADE_RAMP_TIM_MS) * GST_MSECOND, 0.10);
>         gst_object_unref(pCtrlSource);
>  
> There is another function which is triggered from outside some minutes later which tries to reduce the volume to 50%.
> 
> Therefore I directly set the volume property:
> g_object_set(G_OBJECT(m_pElVolume), "volume", 0.5, NULL);
>  
> But nothing happens. If I remove the control source (just uncomment code above) reducing the volume works as expected.
> I guess that I have to remove or destroy something after the fade in but I have no idea.
>  
> Any ideas?
> 
> 
> 
> 
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-- 
Olivier Crête
olivier.crete at collabora.com

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