[gst-devel] caps negotiation

[Benoit F. <ben...@pu...>]

Hi,

I have a question raising while reading the doc GStreamer Plugin
Writer's Guide.
In chapter 10, the example of the element which can convert between
samplerates puzzles me:

static gboolean
gst_my_filter_setcaps (GstPad  *pad,
		       GstCaps *caps)
{
  GstMyFilter *filter = GST_MY_FILTER (GST_OBJECT_PARENT (pad));

  if (gst_pad_set_caps (filter->sinkpad, caps)) {
    filter->passthrough = TRUE;

I wonder why we try to set caps on sinkpad.
If someone can help me understand this, because i feel i'm missing
something quite crucial there...

Thanks,

-- Ben