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design: gstelement: add missing markup

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Also fix some minnor grammar issues.
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Reynaldo H. Verdejo Pinochet 2016-12-21 23:38:19 -08:00
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markdown/design/gstelement.md
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@ -5,11 +5,11 @@ as it defines the structure of the pipeline. Elements include sources,
filters, sinks, and containers (Bins). They may be an intrinsic part of filters, sinks, and containers (Bins). They may be an intrinsic part of
the core GStreamer library, or may be loaded from a plugin. In some the core GStreamer library, or may be loaded from a plugin. In some
cases they’re even fabricated from completely different systems (see the cases they’re even fabricated from completely different systems (see the
LADSPA plugin). They are generally created from a GstElementFactory, LADSPA plugin). They are generally created from a `GstElementFactory`,
which will be covered in another chapter, but for the intrinsic types which will be covered in another chapter, but for the intrinsic types
they can be created with specific functions. they can be created with specific functions.
Elements contains GstPads (also covered in another chapter), which are Elements contains `GstPads` (also covered in another chapter), which are
subsequently used to connect the Elements together to form a pipeline subsequently used to connect the Elements together to form a pipeline
capable of passing and processing data. They have a parent, which must capable of passing and processing data. They have a parent, which must
be another Element. This allows deeply nested pipelines, and the be another Element. This allows deeply nested pipelines, and the
@ -28,24 +28,24 @@ parentage or name of an element is changed.
## Pads ## Pads
GstPads are the property of a given GstElement. They provide the `GstPads` are the property of a given `GstElement`. They provide the
connection capability, with allowing arbitrary structure in the graph. connection capability, with allowing arbitrary structure in the graph.
For any Element but a source or sink, there will be at least 2 Pads For any Element but a source or sink, there will be at least 2 Pads
owned by the Element. These pads are stored in a single GList within the owned by the Element. These pads are stored in a single `GList` within the
Element. Several counters are kept in order to allow quicker Element. Several counters are kept in order to allow quicker
determination of the type and properties of a given Element. determination of the type and properties of a given Element.
Pads may be added to an element with `_add_pad.` Retrieval is via Pads may be added to an element with `_add_pad()`. Retrieval is done via
`_get_static_pad()`, which operates on the name of the Pad (the unique `_get_static_pad()`, which operates on the name of the Pad (the unique
key). This means that all Pads owned by a given Element must have unique key). This means that all Pads owned by a given Element must have unique
names. A pointer to the GList of pads may be obtained with names. A pointer to the `GList` of pads may be obtained with
`_iterate_pads`. `_iterate_pads()`.
`gst_element_add_pad(element,pads)`: Sets the element as the parent of `gst_element_add_pad(element,pads)`: Sets the element as the parent of
the pad, then adds the pad to the element’s list of pads, keeping the the pad, then adds the pad to the element’s list of pads, keeping the
counts of total, src, and sink pads up to date. Emits the `new_pad` counts of total, src, and sink pads up to date. Emits the `new_pad`
signal with the pad as argument. Fails if either the element or pad are signal with the pad as argument. Fails if either the element or pad are
either NULL or not what they claim to be. Should fail if the pad already NULL or not what they claim to be. Should fail if the pad already
has a parent. Should fail if the pad is already owned by the element. has a parent. Should fail if the pad is already owned by the element.
Should fail if there’s already a pad by that name in the list of pads. Should fail if there’s already a pad by that name in the list of pads.