doc: codecalpha: Add plugin documentation
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2199>
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* Boston, MA 02110-1301, USA.
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:plugin-codecalpha
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*
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* This plugin contains a set of utilities that helps handling alpha encoded
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* streams as produced by some WebM streams using VP8/VP9. The elements are
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* meant to be used in decoder wrappers which allows playbin to automatically
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* handle these streams.
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*
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* `codecalphademux` will produce two streams out of a stream of buffers holding
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* the #GstVideoCodecAlphaMeta. The presence of the meta is indicated by the
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* usage of the field `codec-alpha=(boolean)true` in the caps. This is only
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* applicable to VP8 and VP9 for now.
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*
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* Wrappers for vp8dec and vp9dec are available, allowing seamless support for
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* these streams inside playbin (which is used by WebKit GTK and WPE).
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*
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* Since: 1.20
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*/
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#ifdef HAVE_CONFIG_H
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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# include <config.h>
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#endif
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#endif
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