Commit graph

4 commits

Author SHA1 Message Date
Tim-Philipp Müller
395ecb3d2f avtp: rename tstamp-mode to timestamp-mode
I thnk w cn spre the xtra lttrs.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1397>
2020-07-11 00:14:44 +01:00
Tim-Philipp Müller
c229127b43 avtp: documentation fixes
Unclear why hotdoc wants 'gstavtp' as the plugin name here,
that's just wrong.

Add since marker and mark private subclasses as plugin API
so hotdoc knows they belong to the plugin and aren't external.

Fix GstAvtpAafTstampMode get_type() function.
2020-07-01 18:41:25 +01:00
Ederson de Souza
f1976e0de5 avtp: Plug several leaks
After finally running tests with valgrind enabled, some leaks were found
- both on code and on tests themselves. This patch plugs them all!
2020-02-07 21:53:57 +00:00
Andre Guedes
1e985f02f4 avtp: Introduce AAF payloader element
This patch introduces the AVTP Audio Format (AAF) payloader element from
the AVTP plugin. The element inputs audio raw data and outputs AVTP
packets (aka AVTPDUs), implementing a typical protocol payloader element
from GStreamer.

AAF is one of the available formats to transport audio data in an AVTP
system. AAF is specified in IEEE 1722-2016 section 7 and provides two
encapsulation mode: PCM and AES3. This patch implements PCM
encapsulation mode only.

The AAF payloader working mechanism consists of building the AAF header,
prepending it to the GstBuffer received on the sink pad, and pushing the
buffer downstream. Payloader parameters such as stream ID, maximum
transit time, time uncertainty, and timestamping mode are passed via
element properties. AAF doesn't support all possible sample format and
sampling rate values so the sink pad caps template from the payloader is
a subset of audio/x-raw. Additionally, this patch implements only
"normal" timestamping mode from AAF. "Sparse" mode should be implemented
in future.

Upcoming patches will introduce other AVTP payloader elements that will
have some common code. For that reason, this patch introduces the
GstAvtpBasePayload abstract class that implements common payloader
functionalities, and the GstAvtpAafPay class that extends the
GstAvtpBasePayload class, implementing AAF-specific functionalities.

The AAF payloader element is most likely to be used with the AVTP sink
element (to be introduced by a later patch) but it could also be used
with UDP sink element to implement AVTP over UDP as described in IEEE
1722-2016 Annex J.

This element was inspired by RTP payloader elements.
2019-07-03 09:59:35 -07:00