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application-development: interfaces: rewrite URI handler section

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Reynaldo H. Verdejo Pinochet 2017-09-07 17:35:41 -07:00
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markdown/application-development/advanced/interfaces.md
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@ -19,28 +19,31 @@ scope and purpose of each interface.
[element-object]: application-development/basics/elements.md#using-an-element-as-a-gobject
## The URI interface
## The URI Handler interface
In all examples so far, we have only supported local files through the
“filesrc” element. GStreamer, obviously, supports many more location
sources. However, we don't want applications to need to know any
particular element implementation details, such as element names for
particular network source types and so on. Therefore, there is a URI
interface, which can be used to get the source element that supports a
particular URI type. There is no strict rule for URI naming, but in
general we follow naming conventions that others use too. For example,
assuming you have the correct plugins installed, GStreamer supports:
In the examples so far, we have only showed support for local files
using the “filesrc” element, but GStreamer supports many more location
sources.
GStreamer doesn't require applications to know any `URI` specifics, like
what element to use for a particular network source types. These details
are abstracted by the `GstURIHandler` interface.
There is no strict rule for `URI` naming, but in general, we follow
common-usage naming conventions. For example, assuming you have the
correct plugins installed, GStreamer supports:
```
file:///<path>/<file>
http://<host>/<path>/<file>
mms://<host>/<path>/<file>
dvb://<CHANNEL>
...
```
In order to get the source or sink element supporting a particular URI,
use `gst_element_make_from_uri ()`, with the URI type being either
`GST_URI_SRC` for a source element, or `GST_URI_SINK` for a sink
element.
use `gst_element_make_from_uri ()` with `GST_URI_SRC` or `GST_URI_SINK`
as `GstURIType` depending in the direction you need.
You can convert filenames to and from URIs using GLib's
`g_filename_to_uri ()` and `g_uri_to_filename ()`.