Prepare a new segment for emission downstream. This function must
only be called by derived sub-classes, and only from the #GstBaseSrcClass::create function,
as the stream-lock needs to be held.
The format for the @segment must be identical with the current format
of the source, as configured with gst_base_src_set_format().
The format of @src must not be %GST_FORMAT_UNDEFINED and the format
should be configured via gst_base_src_set_format() before calling this method.
Prepare a new segment for emission downstream. This function must only be called by derived sub-classes, and only from the #GstBaseSrcClass::create function, as the stream-lock needs to be held.
The format for the @segment must be identical with the current format of the source, as configured with gst_base_src_set_format().
The format of @src must not be %GST_FORMAT_UNDEFINED and the format should be configured via gst_base_src_set_format() before calling this method.