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doc: codecalpha: Add plugin documentation

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2199>
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Nicolas Dufresne 2021-05-07 11:28:21 -04:00
parent 69ec933605
commit e08c0803e1
1 changed files with 19 additions and 0 deletions
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gst/codecalpha/gstplugin.c
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@ -18,6 +18,25 @@
* Boston, MA 02110-1301, USA. * Boston, MA 02110-1301, USA.
*/ */
/**
* SECTION:plugin-codecalpha
*
* This plugin contains a set of utilities that helps handling alpha encoded
* streams as produced by some WebM streams using VP8/VP9. The elements are
* meant to be used in decoder wrappers which allows playbin to automatically
* handle these streams.
*
* `codecalphademux` will produce two streams out of a stream of buffers holding
* the #GstVideoCodecAlphaMeta. The presence of the meta is indicated by the
* usage of the field `codec-alpha=(boolean)true` in the caps. This is only
* applicable to VP8 and VP9 for now.
*
* Wrappers for vp8dec and vp9dec are available, allowing seamless support for
* these streams inside playbin (which is used by WebKit GTK and WPE).
*
* Since: 1.20
*/
#ifdef HAVE_CONFIG_H #ifdef HAVE_CONFIG_H
# include <config.h> # include <config.h>
#endif #endif