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typefind: add gst_type_find_suggest_empty_simple()

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For cases where you only need a media type and no other fields.

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/774#note_848664

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/774>
This commit is contained in:
Chris White 2021-03-27 17:10:06 -04:00
parent a38d06cb1c
commit 7954eaaf25
2 changed files with 38 additions and 1 deletions
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35
gst/gsttypefind.c
View file

@ -148,6 +148,38 @@ gst_type_find_suggest (GstTypeFind * find, guint probability, GstCaps * caps)
find->suggest (find->data, probability, caps);
}
/**
* gst_type_find_suggest_empty_simple:
* @find: The #GstTypeFind object the function was called with
* @probability: The probability in percent that the suggestion is right
* @media_type: the media type of the suggested caps
*
* If a #GstTypeFindFunction calls this function it suggests caps of the
* given @media_type with the given @probability.
*
* This function is similar to gst_type_find_suggest_simple(), but uses
* a #GstCaps with no fields.
*
* Since: 1.20
*/
void
gst_type_find_suggest_empty_simple (GstTypeFind * find,
guint probability, const char *media_type)
{
GstCaps *caps;
g_return_if_fail (find->suggest != NULL);
g_return_if_fail (probability <= 100);
g_return_if_fail (media_type != NULL);
caps = gst_caps_new_empty_simple (media_type);
g_return_if_fail (gst_caps_is_fixed (caps));
find->suggest (find->data, probability, caps);
gst_caps_unref (caps);
}
/**
* gst_type_find_suggest_simple:
* @find: The #GstTypeFind object the function was called with
@ -156,7 +188,8 @@ gst_type_find_suggest (GstTypeFind * find, guint probability, GstCaps * caps)
* @fieldname: (allow-none): first field of the suggested caps, or %NULL
* @...: additional arguments to the suggested caps in the same format as the
* arguments passed to gst_structure_new() (ie. triplets of field name,
* field GType and field value)
* field GType and field value). If @fieldname is %NULL, this list
* must be exactly one %NULL.
*
* If a #GstTypeFindFunction calls this function it suggests the caps with the
* given probability. A #GstTypeFindFunction may supply different suggestions

4
gst/gsttypefind.h
View file

@ -193,6 +193,10 @@ void gst_type_find_suggest (GstTypeFind * find,
guint probability,
GstCaps * caps);
GST_API
void gst_type_find_suggest_empty_simple (GstTypeFind * find,
guint probability,
const char * media_type);
GST_API
void gst_type_find_suggest_simple (GstTypeFind * find,
guint probability,
const char * media_type,