mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-01 22:21:13 +00:00
74da6ad937
Original commit message from CVS: * docs/gst/gstreamer-sections.txt: Add docs for new methods. * gst/gstevent.c: (gst_event_new_latency), (gst_event_parse_latency): * gst/gstevent.h: Add new LATENCY event to configure latency in a pipeline. API: gst_event_new_latency API: gst_event_parse_latency * gst/gstmessage.c: (gst_message_new_buffering), (gst_message_new_lost_preroll), (gst_message_new_prerolled), (gst_message_new_latency), (gst_message_parse_buffering), (gst_message_parse_lost_preroll): * gst/gstmessage.h: Added messages used in draft-latency. API: gst_message_new_lost_preroll API: gst_message_parse_lost_preroll API: gst_message_new_prerolled API: gst_message_new_latency * gst/gstquery.c: (gst_query_new_latency), (gst_query_set_latency), (gst_query_parse_latency): * gst/gstquery.h: Implemented new latency query as in design doc. API: gst_query_new_latency API: gst_query_set_latency API: gst_query_parse_latency
253 lines
8.8 KiB
C
253 lines
8.8 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wim.taymans@chello.be>
|
|
* 2005 Wim Taymans <wim@fluendo.com>
|
|
*
|
|
* gstquery.h: GstQuery API declaration
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
|
|
#ifndef __GST_QUERY_H__
|
|
#define __GST_QUERY_H__
|
|
|
|
#include <glib.h>
|
|
|
|
#include <gst/gstiterator.h>
|
|
#include <gst/gstminiobject.h>
|
|
#include <gst/gststructure.h>
|
|
#include <gst/gstformat.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
/**
|
|
* GstQueryType:
|
|
* @GST_QUERY_NONE: invalid query type
|
|
* @GST_QUERY_POSITION: current position in stream
|
|
* @GST_QUERY_DURATION: total duration of the stream
|
|
* @GST_QUERY_LATENCY: latency of stream
|
|
* @GST_QUERY_JITTER: current jitter of stream
|
|
* @GST_QUERY_RATE: current rate of the stream
|
|
* @GST_QUERY_SEEKING: seeking capabilities
|
|
* @GST_QUERY_SEGMENT: segment start/stop positions
|
|
* @GST_QUERY_CONVERT: convert values between formats
|
|
* @GST_QUERY_FORMATS: query supported formats for convert
|
|
*
|
|
* Standard predefined Query types
|
|
*/
|
|
/* NOTE: don't forget to update the table in gstquery.c when changing
|
|
* this enum */
|
|
typedef enum {
|
|
GST_QUERY_NONE = 0,
|
|
GST_QUERY_POSITION,
|
|
GST_QUERY_DURATION,
|
|
GST_QUERY_LATENCY,
|
|
GST_QUERY_JITTER, /* not in draft-query, necessary? */
|
|
GST_QUERY_RATE,
|
|
GST_QUERY_SEEKING,
|
|
GST_QUERY_SEGMENT,
|
|
GST_QUERY_CONVERT,
|
|
GST_QUERY_FORMATS
|
|
} GstQueryType;
|
|
|
|
typedef struct _GstQueryTypeDefinition GstQueryTypeDefinition;
|
|
typedef struct _GstQuery GstQuery;
|
|
typedef struct _GstQueryClass GstQueryClass;
|
|
|
|
/**
|
|
* GstQueryTypeDefinition:
|
|
* @value: the unique id of the Query type
|
|
* @nick: a short nick
|
|
* @description: a longer description of the query type
|
|
* @quark: the quark for the nick
|
|
*
|
|
* A Query Type definition
|
|
*/
|
|
struct _GstQueryTypeDefinition
|
|
{
|
|
GstQueryType value;
|
|
gchar *nick;
|
|
gchar *description;
|
|
GQuark quark;
|
|
};
|
|
|
|
#define GST_TYPE_QUERY (gst_query_get_type())
|
|
#define GST_IS_QUERY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_QUERY))
|
|
#define GST_IS_QUERY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_QUERY))
|
|
#define GST_QUERY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_QUERY, GstQueryClass))
|
|
#define GST_QUERY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_QUERY, GstQuery))
|
|
#define GST_QUERY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_QUERY, GstQueryClass))
|
|
|
|
/**
|
|
* GST_QUERY_TYPE:
|
|
* @query: the query to query
|
|
*
|
|
* Get the #GstQueryType of the query.
|
|
*/
|
|
#define GST_QUERY_TYPE(query) (((GstQuery*)(query))->type)
|
|
|
|
/**
|
|
* GST_QUERY_TYPE_NAME:
|
|
* @query: the query to query
|
|
*
|
|
* Get a constant string representation of the #GstQueryType of the query.
|
|
*
|
|
* Since: 0.10.4
|
|
*/
|
|
#define GST_QUERY_TYPE_NAME(query) (gst_query_type_get_name(GST_QUERY_TYPE(query)))
|
|
|
|
|
|
/**
|
|
* GstQuery:
|
|
* @mini_object: The parent #GstMiniObject type
|
|
* @type: the #GstQueryType
|
|
* @structure: the #GstStructure containing the query details.
|
|
*
|
|
* The #GstQuery structure.
|
|
*/
|
|
struct _GstQuery
|
|
{
|
|
GstMiniObject mini_object;
|
|
|
|
/*< public > *//* with COW */
|
|
GstQueryType type;
|
|
|
|
GstStructure *structure;
|
|
|
|
/*< private > */
|
|
gpointer _gst_reserved;
|
|
};
|
|
|
|
struct _GstQueryClass {
|
|
GstMiniObjectClass mini_object_class;
|
|
|
|
/*< private > */
|
|
gpointer _gst_reserved[GST_PADDING];
|
|
};
|
|
|
|
void _gst_query_initialize (void);
|
|
|
|
const gchar* gst_query_type_get_name (GstQueryType query);
|
|
GQuark gst_query_type_to_quark (GstQueryType query);
|
|
|
|
GType gst_query_get_type (void);
|
|
|
|
/* register a new query */
|
|
GstQueryType gst_query_type_register (const gchar *nick,
|
|
const gchar *description);
|
|
GstQueryType gst_query_type_get_by_nick (const gchar *nick);
|
|
|
|
/* check if a query is in an array of querys */
|
|
gboolean gst_query_types_contains (const GstQueryType *types,
|
|
GstQueryType type);
|
|
|
|
/* query for query details */
|
|
|
|
G_CONST_RETURN GstQueryTypeDefinition*
|
|
gst_query_type_get_details (GstQueryType type);
|
|
GstIterator* gst_query_type_iterate_definitions (void);
|
|
|
|
/* refcounting */
|
|
/**
|
|
* gst_query_ref:
|
|
* @q: a #GstQuery to increase the refcount of.
|
|
*
|
|
* Increases the refcount of the given query by one.
|
|
*/
|
|
#define gst_query_ref(q) GST_QUERY (gst_mini_object_ref (GST_MINI_OBJECT (q)))
|
|
/**
|
|
* gst_query_unref:
|
|
* @q: a #GstQuery to decrease the refcount of.
|
|
*
|
|
* Decreases the refcount of the query. If the refcount reaches 0, the query
|
|
* will be freed.
|
|
*/
|
|
#define gst_query_unref(q) gst_mini_object_unref (GST_MINI_OBJECT (q))
|
|
|
|
/* copy query */
|
|
/**
|
|
* gst_query_copy:
|
|
* @q: a #GstQuery to copy.
|
|
*
|
|
* Copies the given query using the copy function of the parent #GstData
|
|
* structure.
|
|
*/
|
|
#define gst_query_copy(q) GST_QUERY (gst_mini_object_copy (GST_MINI_OBJECT (q)))
|
|
/**
|
|
* gst_query_make_writable:
|
|
* @q: a #GstQuery to make writable
|
|
*
|
|
* Makes a writable query from the given query.
|
|
*/
|
|
#define gst_query_make_writable(q) GST_QUERY (gst_mini_object_make_writable (GST_MINI_OBJECT (q)))
|
|
|
|
/* position query */
|
|
GstQuery* gst_query_new_position (GstFormat format);
|
|
void gst_query_set_position (GstQuery *query, GstFormat format, gint64 cur);
|
|
void gst_query_parse_position (GstQuery *query, GstFormat *format, gint64 *cur);
|
|
|
|
/* duration query */
|
|
GstQuery* gst_query_new_duration (GstFormat format);
|
|
void gst_query_set_duration (GstQuery *query, GstFormat format, gint64 duration);
|
|
void gst_query_parse_duration (GstQuery *query, GstFormat *format, gint64 *duration);
|
|
|
|
/* latency query */
|
|
GstQuery* gst_query_new_latency (void);
|
|
void gst_query_set_latency (GstQuery *query, gboolean live, GstClockTime min_latency,
|
|
GstClockTime max_latency);
|
|
void gst_query_parse_latency (GstQuery *query, gboolean *live, GstClockTime *min_latency,
|
|
GstClockTime *max_latency);
|
|
|
|
/* convert query */
|
|
GstQuery* gst_query_new_convert (GstFormat src_format, gint64 value, GstFormat dest_format);
|
|
void gst_query_set_convert (GstQuery *query, GstFormat src_format, gint64 src_value,
|
|
GstFormat dest_format, gint64 dest_value);
|
|
void gst_query_parse_convert (GstQuery *query, GstFormat *src_format, gint64 *src_value,
|
|
GstFormat *dest_format, gint64 *dest_value);
|
|
/* segment query */
|
|
GstQuery* gst_query_new_segment (GstFormat format);
|
|
void gst_query_set_segment (GstQuery *query, gdouble rate, GstFormat format,
|
|
gint64 start_value, gint64 stop_value);
|
|
void gst_query_parse_segment (GstQuery *query, gdouble *rate, GstFormat *format,
|
|
gint64 *start_value, gint64 *stop_value);
|
|
|
|
/* application specific query */
|
|
GstQuery * gst_query_new_application (GstQueryType type,
|
|
GstStructure *structure);
|
|
GstStructure * gst_query_get_structure (GstQuery *query);
|
|
|
|
/* seeking query */
|
|
GstQuery* gst_query_new_seeking (GstFormat format);
|
|
void gst_query_set_seeking (GstQuery *query, GstFormat format,
|
|
gboolean seekable,
|
|
gint64 segment_start,
|
|
gint64 segment_end);
|
|
void gst_query_parse_seeking (GstQuery *query, GstFormat *format,
|
|
gboolean *seekable,
|
|
gint64 *segment_start,
|
|
gint64 *segment_end);
|
|
/* formats query */
|
|
GstQuery* gst_query_new_formats (void);
|
|
void gst_query_set_formats (GstQuery *query, gint n_formats, ...);
|
|
void gst_query_set_formatsv (GstQuery *query, gint n_formats, GstFormat *formats);
|
|
void gst_query_parse_formats_length (GstQuery *query, guint *n_formats);
|
|
void gst_query_parse_formats_nth (GstQuery *query, guint nth, GstFormat *format);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_QUERY_H__ */
|
|
|