mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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74ca793b0a
Original commit message from CVS: Clock fixes. Added async callbacks and clock unscheduling. Threading fixes. Fixed race condition in GstTask and possible deadlock in _pad_get_caps(). Made various subsystems (query, format,..) threadsafe. Lots of cleanups and documentation.
99 lines
3.3 KiB
C
99 lines
3.3 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wim.taymans@chello.be>
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* 2005 Wim Taymans <wim@fluendo.com>
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*
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* gstquery.h: GstQuery API declaration
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_QUERY_H__
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#define __GST_QUERY_H__
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#include <glib.h>
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#include <gst/gstiterator.h>
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G_BEGIN_DECLS
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typedef enum {
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GST_QUERY_NONE = 0,
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GST_QUERY_TOTAL,
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GST_QUERY_POSITION,
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GST_QUERY_LATENCY,
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GST_QUERY_JITTER,
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GST_QUERY_START,
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GST_QUERY_SEGMENT_END,
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GST_QUERY_RATE
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} GstQueryType;
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/* rate is relative to 1000000 */
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#define GST_QUERY_TYPE_RATE_DEN G_GINT64_CONSTANT (1000000)
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typedef struct _GstQueryTypeDefinition GstQueryTypeDefinition;
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struct _GstQueryTypeDefinition
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{
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GstQueryType value;
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gchar *nick;
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gchar *description;
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};
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#ifdef G_HAVE_ISO_VARARGS
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#define GST_QUERY_TYPE_FUNCTION(type, functionname, ...) \
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static const GstQueryType* \
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functionname (type object) \
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{ \
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static const GstQueryType types[] = { \
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__VA_ARGS__, \
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0 \
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}; \
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return types; \
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}
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#elif defined(G_HAVE_GNUC_VARARGS)
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#define GST_QUERY_TYPE_FUNCTION(type, functionname, a...) \
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static const GstQueryType* \
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functionname (type object) \
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{ \
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static const GstQueryType types[] = { \
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a, \
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0 \
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}; \
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return types; \
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}
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#endif
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void _gst_query_type_initialize (void);
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/* register a new query */
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GstQueryType gst_query_type_register (const gchar *nick,
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const gchar *description);
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GstQueryType gst_query_type_get_by_nick (const gchar *nick);
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/* check if a query is in an array of querys */
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gboolean gst_query_types_contains (const GstQueryType *types, GstQueryType type);
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/* query for query details */
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G_CONST_RETURN GstQueryTypeDefinition*
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gst_query_type_get_details (GstQueryType type);
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GstIterator* gst_query_type_iterate_definitions (void);
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G_END_DECLS
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#endif /* __GST_QUERY_H__ */
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