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query: Add gst_query_has_context_type()

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This commit is contained in:
Sebastian Dröge 2013-07-16 15:16:16 +02:00
parent 0dc232e114
commit 356ef049d3
4 changed files with 37 additions and 4 deletions
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1
docs/gst/gstreamer-sections.txt
View file

@ -2376,6 +2376,7 @@ gst_query_parse_context
gst_query_add_context_type
gst_query_get_n_context_types
gst_query_parse_nth_context_type
gst_query_has_context_type
<SUBSECTION Standard>
GstQueryClass
GST_QUERY

38
gst/gstquery.c
View file

@ -2503,7 +2503,7 @@ free_array_string (gpointer ptr)
/**
* gst_query_add_context_type:
* @query: a GST_QUERY_NEED_CONTEXT type query
* @query: a GST_QUERY_CONTEXT type query
* @context_type: a context type
*
* Add a new context type to @query.
@ -2528,7 +2528,7 @@ gst_query_add_context_type (GstQuery * query, const gchar * context_type)
/**
* gst_query_get_n_context_types:
* @query: a GST_QUERY_NEED_CONTEXT type query
* @query: a GST_QUERY_CONTEXT type query
*
* Retrieve the number of values currently stored in the
* context-types array of the query's structure.
@ -2552,10 +2552,10 @@ gst_query_get_n_context_types (GstQuery * query)
/**
* gst_query_parse_nth_context_type:
* @query: a GST_QUERY_NEED_CONTEXT type query
* @query: a GST_QUERY_CONTEXT type query
* @context_type: (out) (allow-none): the context type, or NULL
*
* Parse a context type from an existing GST_QUERY_NEED_CONTEXT query
* Parse a context type from an existing GST_QUERY_CONTEXT query
* from @index.
*
* Returns: a #gboolean indicating if the parsing succeeded.
@ -2580,3 +2580,33 @@ gst_query_parse_nth_context_type (GstQuery * query, guint index,
return TRUE;
}
/**
* gst_query_has_context_type:
* @query: a GST_QUERY_CONTEXT type query
* @context_type: the context type
*
* Check if @query is asking for @context_type.
*
* Returns: %TRUE if @context_type is requested.
*/
gboolean
gst_query_has_context_type (GstQuery * query, const gchar * context_type)
{
guint i, n;
g_return_val_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_CONTEXT, FALSE);
g_return_val_if_fail (context_type != NULL, FALSE);
n = gst_query_get_n_context_types (query);
for (i = 0; i < n; i++) {
const gchar *tmp;
if (gst_query_parse_nth_context_type (query, i, &tmp) &&
strcmp (tmp, context_type) == 0)
return TRUE;
}
return FALSE;
}

1
gst/gstquery.h
View file

@ -487,6 +487,7 @@ GstQuery * gst_query_new_context (void) G_GNUC_MALLOC;
void gst_query_add_context_type (GstQuery * query, const gchar * context_type);
guint gst_query_get_n_context_types (GstQuery * query);
gboolean gst_query_parse_nth_context_type (GstQuery * query, guint i, const gchar ** context_type);
gboolean gst_query_has_context_type (GstQuery * query, const gchar * context_type);
void gst_query_set_context (GstQuery *query, GstContext *context);
void gst_query_parse_context (GstQuery *query, GstContext **context);

1
win32/common/libgstreamer.def
View file

@ -922,6 +922,7 @@ EXPORTS
gst_query_get_n_scheduling_modes
gst_query_get_structure
gst_query_get_type
gst_query_has_context_type
gst_query_has_scheduling_mode
gst_query_has_scheduling_mode_with_flags
gst_query_new_accept_caps