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3f62c7db23
Original commit message from CVS: * docs/manual/advanced-autoplugging.xml: * docs/manual/basics-helloworld.xml: * docs/manual/basics-pads.xml: * docs/random/ds/0.9-suggested-changes: * gst/gstelement.c: (gst_element_class_init), (gst_element_seek): * gst/gstelement.h: * gst/gstevent.h: * gst/gstformat.h: * gst/gstquery.h: * gst/gststructure.c: (gst_structure_value_get_generic_type), (gst_structure_parse_array), (gst_structure_parse_value): * gst/gstvalue.c: (gst_type_is_fixed), (gst_value_list_prepend_value), (gst_value_list_append_value), (gst_value_list_get_size), (gst_value_list_get_value), (gst_value_transform_array_string), (gst_value_serialize_array), (gst_value_deserialize_array), (gst_value_intersect_array), (gst_value_is_fixed), (_gst_value_initialize): * gst/gstvalue.h: GstElement::new-pad -> pad-added, GstElement::state-change -> state-changed, GstValueFixedList -> GstValueArray, add format and flags as their own arguments in gst_element_seek() (should improve "bindeability"), remove function generators since they don't work under a whole bunch of compilers (they were deprecated already anyway).
139 lines
4.9 KiB
C
139 lines
4.9 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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#include <gst/gstminiobject.h>
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#include <gst/gststructure.h>
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#include <gst/gstformat.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_POSITION, /* get current/end position */
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GST_QUERY_LATENCY, /* get current latency */
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GST_QUERY_JITTER, /* not in draft-query, necessary? */
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GST_QUERY_RATE, /* get current playback rate */
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GST_QUERY_SEEKING, /* get seeking start/stop positions */
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GST_QUERY_CONVERT, /* convert values */
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GST_QUERY_FORMATS /* query supported formats for convert */
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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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typedef struct _GstQuery GstQuery;
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typedef struct _GstQueryClass GstQueryClass;
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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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#define GST_TYPE_QUERY (gst_query_get_type())
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#define GST_IS_QUERY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_QUERY))
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#define GST_IS_QUERY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_QUERY))
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#define GST_QUERY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_QUERY, GstQueryClass))
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#define GST_QUERY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_QUERY, GstQuery))
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#define GST_QUERY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_QUERY, GstQueryClass))
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#define GST_QUERY_TYPE(query) (((GstQuery*)(query))->type)
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struct _GstQuery
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{
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GstMiniObject mini_object;
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/*< public > */
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GstQueryType type;
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GstStructure *structure;
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/*< private > */
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstQueryClass {
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GstMiniObjectClass mini_object_class;
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/*< private > */
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gpointer _gst_reserved[GST_PADDING];
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};
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void _gst_query_initialize (void);
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GType gst_query_get_type (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,
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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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/* refcounting */
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#define gst_query_ref(msg) GST_QUERY (gst_mini_object_ref (GST_MINI_OBJECT (msg)))
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#define gst_query_unref(msg) gst_mini_object_unref (GST_MINI_OBJECT (msg))
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/* copy query */
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#define gst_query_copy(msg) GST_QUERY (gst_mini_object_copy (GST_MINI_OBJECT (msg)))
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#define gst_query_make_writable(msg) GST_QUERY (gst_mini_object_make_writable (GST_MINI_OBJECT (msg)))
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/* position query */
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GstQuery* gst_query_new_position (GstFormat format);
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void gst_query_set_position (GstQuery *query, GstFormat format,
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gint64 cur, gint64 end);
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void gst_query_parse_position (GstQuery *query, GstFormat *format,
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gint64 *cur, gint64 *end);
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/* convert query */
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GstQuery* gst_query_new_convert (GstFormat src_fmt, gint64 value, GstFormat dest_fmt);
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void gst_query_set_convert (GstQuery *query, GstFormat src_format, gint64 src_value,
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GstFormat dest_format, gint64 dest_value);
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void gst_query_parse_convert (GstQuery *query, GstFormat *src_format, gint64 *src_value,
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GstFormat *dest_format, gint64 *dest_value);
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/* application specific query */
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GstQuery * gst_query_new_application (GstQueryType type,
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GstStructure *structure);
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GstStructure * gst_query_get_structure (GstQuery *query);
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G_END_DECLS
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#endif /* __GST_QUERY_H__ */
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