mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-05 09:00:54 +00:00
1756e6aa87
Original commit message from CVS: * gst/gstindexfactory.c: (gst_index_factory_get_type): * gst/gstplugin.c: (gst_plugin_init): * gst/gstpluginfeature.c: (gst_plugin_feature_init): * gst/gstquery.c: (gst_query_get_type): * gst/gstregistry.c: (gst_registry_init): * gst/gsturi.c: (gst_uri_handler_base_init): Remove empty instance_init() functions to save relocs and lessen the noise. Remove some of the function prototypes that are doubled by G_DEFINE_TYPE.
1092 lines
30 KiB
C
1092 lines
30 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.c: GstQueryType registration and Query parsing/creation
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/**
|
|
* SECTION:gstquery
|
|
* @short_description: Dynamically register new query types. Provide functions
|
|
* to create queries, and to set and parse values in them.
|
|
* @see_also: #GstPad, #GstElement
|
|
*
|
|
* GstQuery functions are used to register a new query types to the gstreamer
|
|
* core.
|
|
* Query types can be used to perform queries on pads and elements.
|
|
*
|
|
* Queries can be created using the gst_query_new_xxx() functions.
|
|
* Query values can be set using gst_query_set_xxx(), and parsed using
|
|
* gst_query_parse_xxx() helpers.
|
|
*
|
|
* The following example shows how to query the duration of a pipeline:
|
|
*
|
|
* <example>
|
|
* <title>Query duration on a pipeline</title>
|
|
* <programlisting>
|
|
* GstQuery *query;
|
|
* gboolean res;
|
|
* query = gst_query_new_duration (GST_FORMAT_TIME);
|
|
* res = gst_element_query (pipeline, query);
|
|
* if (res) {
|
|
* gint64 duration;
|
|
* gst_query_parse_duration (query, NULL, &duration);
|
|
* g_print ("duration = %"GST_TIME_FORMAT, GST_TIME_ARGS (duration));
|
|
* }
|
|
* else {
|
|
* g_print ("duration query failed...");
|
|
* }
|
|
* gst_query_unref (query);
|
|
* </programlisting>
|
|
* </example>
|
|
*
|
|
* Last reviewed on 2006-02-14 (0.10.4)
|
|
*/
|
|
|
|
#include "gst_private.h"
|
|
#include "gstinfo.h"
|
|
#include "gstquery.h"
|
|
#include "gstvalue.h"
|
|
#include "gstenumtypes.h"
|
|
#include "gstquark.h"
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_query_debug);
|
|
#define GST_CAT_DEFAULT gst_query_debug
|
|
|
|
static void gst_query_class_init (gpointer g_class, gpointer class_data);
|
|
static void gst_query_finalize (GstQuery * query);
|
|
static GstQuery *_gst_query_copy (GstQuery * query);
|
|
|
|
static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
|
|
static GList *_gst_queries = NULL;
|
|
static GHashTable *_nick_to_query = NULL;
|
|
static GHashTable *_query_type_to_nick = NULL;
|
|
static guint32 _n_values = 1; /* we start from 1 because 0 reserved for NONE */
|
|
|
|
static GstQueryTypeDefinition standard_definitions[] = {
|
|
{GST_QUERY_POSITION, "position", "Current position", 0},
|
|
{GST_QUERY_DURATION, "duration", "Total duration", 0},
|
|
{GST_QUERY_LATENCY, "latency", "Latency", 0},
|
|
{GST_QUERY_JITTER, "jitter", "Jitter", 0},
|
|
{GST_QUERY_RATE, "rate", "Configured rate 1000000 = 1", 0},
|
|
{GST_QUERY_SEEKING, "seeking", "Seeking capabilities and parameters", 0},
|
|
{GST_QUERY_SEGMENT, "segment", "currently configured segment", 0},
|
|
{GST_QUERY_CONVERT, "convert", "Converting between formats", 0},
|
|
{GST_QUERY_FORMATS, "formats", "Supported formats for conversion", 0},
|
|
{0, NULL, NULL, 0}
|
|
};
|
|
|
|
void
|
|
_gst_query_initialize (void)
|
|
{
|
|
GstQueryTypeDefinition *standards = standard_definitions;
|
|
|
|
GST_CAT_INFO (GST_CAT_GST_INIT, "init queries");
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_query_debug, "query", 0, "query system");
|
|
|
|
g_static_mutex_lock (&mutex);
|
|
if (_nick_to_query == NULL) {
|
|
_nick_to_query = g_hash_table_new (g_str_hash, g_str_equal);
|
|
_query_type_to_nick = g_hash_table_new (NULL, NULL);
|
|
}
|
|
|
|
while (standards->nick) {
|
|
standards->quark = g_quark_from_static_string (standards->nick);
|
|
g_hash_table_insert (_nick_to_query, standards->nick, standards);
|
|
g_hash_table_insert (_query_type_to_nick,
|
|
GINT_TO_POINTER (standards->value), standards);
|
|
|
|
_gst_queries = g_list_append (_gst_queries, standards);
|
|
standards++;
|
|
_n_values++;
|
|
}
|
|
g_static_mutex_unlock (&mutex);
|
|
|
|
gst_query_get_type ();
|
|
}
|
|
|
|
/**
|
|
* gst_query_type_get_name:
|
|
* @query: the query type
|
|
*
|
|
* Get a printable name for the given query type. Do not modify or free.
|
|
*
|
|
* Returns: a reference to the static name of the query.
|
|
*/
|
|
const gchar *
|
|
gst_query_type_get_name (GstQueryType query)
|
|
{
|
|
const GstQueryTypeDefinition *def;
|
|
|
|
def = gst_query_type_get_details (query);
|
|
|
|
return def->nick;
|
|
}
|
|
|
|
/**
|
|
* gst_query_type_to_quark:
|
|
* @query: the query type
|
|
*
|
|
* Get the unique quark for the given query type.
|
|
*
|
|
* Returns: the quark associated with the query type
|
|
*/
|
|
GQuark
|
|
gst_query_type_to_quark (GstQueryType query)
|
|
{
|
|
const GstQueryTypeDefinition *def;
|
|
|
|
def = gst_query_type_get_details (query);
|
|
|
|
return def->quark;
|
|
}
|
|
|
|
GType
|
|
gst_query_get_type (void)
|
|
{
|
|
static GType _gst_query_type;
|
|
|
|
if (G_UNLIKELY (_gst_query_type == 0)) {
|
|
static const GTypeInfo query_info = {
|
|
sizeof (GstQueryClass),
|
|
NULL,
|
|
NULL,
|
|
gst_query_class_init,
|
|
NULL,
|
|
NULL,
|
|
sizeof (GstQuery),
|
|
0,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
_gst_query_type = g_type_register_static (GST_TYPE_MINI_OBJECT,
|
|
"GstQuery", &query_info, 0);
|
|
}
|
|
return _gst_query_type;
|
|
}
|
|
|
|
static void
|
|
gst_query_class_init (gpointer g_class, gpointer class_data)
|
|
{
|
|
GstQueryClass *query_class = GST_QUERY_CLASS (g_class);
|
|
|
|
query_class->mini_object_class.copy =
|
|
(GstMiniObjectCopyFunction) _gst_query_copy;
|
|
query_class->mini_object_class.finalize =
|
|
(GstMiniObjectFinalizeFunction) gst_query_finalize;
|
|
|
|
}
|
|
|
|
static void
|
|
gst_query_finalize (GstQuery * query)
|
|
{
|
|
g_return_if_fail (query != NULL);
|
|
|
|
if (query->structure) {
|
|
gst_structure_set_parent_refcount (query->structure, NULL);
|
|
gst_structure_free (query->structure);
|
|
}
|
|
}
|
|
|
|
static GstQuery *
|
|
_gst_query_copy (GstQuery * query)
|
|
{
|
|
GstQuery *copy;
|
|
|
|
copy = (GstQuery *) gst_mini_object_new (GST_TYPE_QUERY);
|
|
|
|
copy->type = query->type;
|
|
|
|
if (query->structure) {
|
|
copy->structure = gst_structure_copy (query->structure);
|
|
gst_structure_set_parent_refcount (copy->structure,
|
|
&query->mini_object.refcount);
|
|
}
|
|
|
|
return copy;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* gst_query_type_register:
|
|
* @nick: The nick of the new query
|
|
* @description: The description of the new query
|
|
*
|
|
* Create a new GstQueryType based on the nick or return an
|
|
* already registered query with that nick
|
|
*
|
|
* Returns: A new GstQueryType or an already registered query
|
|
* with the same nick.
|
|
*/
|
|
GstQueryType
|
|
gst_query_type_register (const gchar * nick, const gchar * description)
|
|
{
|
|
GstQueryTypeDefinition *query;
|
|
GstQueryType lookup;
|
|
|
|
g_return_val_if_fail (nick != NULL, 0);
|
|
g_return_val_if_fail (description != NULL, 0);
|
|
|
|
lookup = gst_query_type_get_by_nick (nick);
|
|
if (lookup != GST_QUERY_NONE)
|
|
return lookup;
|
|
|
|
query = g_new0 (GstQueryTypeDefinition, 1);
|
|
query->value = _n_values;
|
|
query->nick = g_strdup (nick);
|
|
query->description = g_strdup (description);
|
|
query->quark = g_quark_from_static_string (query->nick);
|
|
|
|
g_static_mutex_lock (&mutex);
|
|
g_hash_table_insert (_nick_to_query, query->nick, query);
|
|
g_hash_table_insert (_query_type_to_nick, GINT_TO_POINTER (query->value),
|
|
query);
|
|
_gst_queries = g_list_append (_gst_queries, query);
|
|
_n_values++;
|
|
g_static_mutex_unlock (&mutex);
|
|
|
|
return query->value;
|
|
}
|
|
|
|
/**
|
|
* gst_query_type_get_by_nick:
|
|
* @nick: The nick of the query
|
|
*
|
|
* Get the query type registered with @nick.
|
|
*
|
|
* Returns: The query registered with @nick or #GST_QUERY_NONE
|
|
* if the query was not registered.
|
|
*/
|
|
GstQueryType
|
|
gst_query_type_get_by_nick (const gchar * nick)
|
|
{
|
|
GstQueryTypeDefinition *query;
|
|
|
|
g_return_val_if_fail (nick != NULL, 0);
|
|
|
|
g_static_mutex_lock (&mutex);
|
|
query = g_hash_table_lookup (_nick_to_query, nick);
|
|
g_static_mutex_unlock (&mutex);
|
|
|
|
if (query != NULL)
|
|
return query->value;
|
|
else
|
|
return GST_QUERY_NONE;
|
|
}
|
|
|
|
/**
|
|
* gst_query_types_contains:
|
|
* @types: The query array to search
|
|
* @type: the #GstQueryType to find
|
|
*
|
|
* See if the given #GstQueryType is inside the @types query types array.
|
|
*
|
|
* Returns: TRUE if the type is found inside the array
|
|
*/
|
|
gboolean
|
|
gst_query_types_contains (const GstQueryType * types, GstQueryType type)
|
|
{
|
|
if (!types)
|
|
return FALSE;
|
|
|
|
while (*types) {
|
|
if (*types == type)
|
|
return TRUE;
|
|
|
|
types++;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_query_type_get_details:
|
|
* @type: a #GstQueryType
|
|
*
|
|
* Get details about the given #GstQueryType.
|
|
*
|
|
* Returns: The #GstQueryTypeDefinition for @type or NULL on failure.
|
|
*/
|
|
const GstQueryTypeDefinition *
|
|
gst_query_type_get_details (GstQueryType type)
|
|
{
|
|
const GstQueryTypeDefinition *result;
|
|
|
|
g_static_mutex_lock (&mutex);
|
|
result = g_hash_table_lookup (_query_type_to_nick, GINT_TO_POINTER (type));
|
|
g_static_mutex_unlock (&mutex);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_query_type_iterate_definitions:
|
|
*
|
|
* Get a #GstIterator of all the registered query types. The definitions
|
|
* iterated over are read only.
|
|
*
|
|
* Returns: A #GstIterator of #GstQueryTypeDefinition.
|
|
*/
|
|
GstIterator *
|
|
gst_query_type_iterate_definitions (void)
|
|
{
|
|
GstIterator *result;
|
|
|
|
g_static_mutex_lock (&mutex);
|
|
/* FIXME: register a boxed type for GstQueryTypeDefinition */
|
|
result = gst_iterator_new_list (G_TYPE_POINTER,
|
|
g_static_mutex_get_mutex (&mutex), &_n_values, &_gst_queries,
|
|
NULL, NULL, NULL);
|
|
g_static_mutex_unlock (&mutex);
|
|
|
|
return result;
|
|
}
|
|
|
|
static GstQuery *
|
|
gst_query_new (GstQueryType type, GstStructure * structure)
|
|
{
|
|
GstQuery *query;
|
|
|
|
query = (GstQuery *) gst_mini_object_new (GST_TYPE_QUERY);
|
|
|
|
GST_DEBUG ("creating new query %p %d", query, type);
|
|
|
|
query->type = type;
|
|
|
|
if (structure) {
|
|
query->structure = structure;
|
|
gst_structure_set_parent_refcount (query->structure,
|
|
&query->mini_object.refcount);
|
|
} else {
|
|
query->structure = NULL;
|
|
}
|
|
|
|
return query;
|
|
}
|
|
|
|
/**
|
|
* gst_query_new_position:
|
|
* @format: the default #GstFormat for the new query
|
|
*
|
|
* Constructs a new query stream position query object. Use gst_query_unref()
|
|
* when done with it. A position query is used to query the current position
|
|
* of playback in the streams, in some format.
|
|
*
|
|
* Returns: A #GstQuery
|
|
*/
|
|
GstQuery *
|
|
gst_query_new_position (GstFormat format)
|
|
{
|
|
GstQuery *query;
|
|
GstStructure *structure;
|
|
|
|
structure = gst_structure_empty_new ("GstQueryPosition");
|
|
gst_structure_id_set (structure,
|
|
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
|
|
GST_QUARK (CURRENT), G_TYPE_INT64, (gint64) - 1, NULL);
|
|
|
|
query = gst_query_new (GST_QUERY_POSITION, structure);
|
|
|
|
return query;
|
|
}
|
|
|
|
/**
|
|
* gst_query_set_position:
|
|
* @query: a #GstQuery with query type GST_QUERY_POSITION
|
|
* @format: the requested #GstFormat
|
|
* @cur: the position to set
|
|
*
|
|
* Answer a position query by setting the requested value in the given format.
|
|
*/
|
|
void
|
|
gst_query_set_position (GstQuery * query, GstFormat format, gint64 cur)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_POSITION);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
gst_structure_id_set (structure,
|
|
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
|
|
GST_QUARK (CURRENT), G_TYPE_INT64, cur, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_query_parse_position:
|
|
* @query: a #GstQuery
|
|
* @format: the storage for the #GstFormat of the position values (may be NULL)
|
|
* @cur: the storage for the current position (may be NULL)
|
|
*
|
|
* Parse a position query, writing the format into @format, and the position
|
|
* into @cur, if the respective parameters are non-NULL.
|
|
*/
|
|
void
|
|
gst_query_parse_position (GstQuery * query, GstFormat * format, gint64 * cur)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_POSITION);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
if (format)
|
|
*format = g_value_get_enum (gst_structure_id_get_value (structure,
|
|
GST_QUARK (FORMAT)));
|
|
if (cur)
|
|
*cur = g_value_get_int64 (gst_structure_id_get_value (structure,
|
|
GST_QUARK (CURRENT)));
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_query_new_duration:
|
|
* @format: the #GstFormat for this duration query
|
|
*
|
|
* Constructs a new stream duration query object to query in the given format.
|
|
* Use gst_query_unref() when done with it. A duration query will give the
|
|
* total length of the stream.
|
|
*
|
|
* Returns: A #GstQuery
|
|
*/
|
|
GstQuery *
|
|
gst_query_new_duration (GstFormat format)
|
|
{
|
|
GstQuery *query;
|
|
GstStructure *structure;
|
|
|
|
structure = gst_structure_empty_new ("GstQueryDuration");
|
|
gst_structure_id_set (structure,
|
|
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
|
|
GST_QUARK (DURATION), G_TYPE_INT64, (gint64) - 1, NULL);
|
|
|
|
query = gst_query_new (GST_QUERY_DURATION, structure);
|
|
|
|
return query;
|
|
}
|
|
|
|
/**
|
|
* gst_query_set_duration:
|
|
* @query: a #GstQuery
|
|
* @format: the #GstFormat for the duration
|
|
* @duration: the duration of the stream
|
|
*
|
|
* Answer a duration query by setting the requested value in the given format.
|
|
*/
|
|
void
|
|
gst_query_set_duration (GstQuery * query, GstFormat format, gint64 duration)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_DURATION);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
gst_structure_id_set (structure,
|
|
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
|
|
GST_QUARK (DURATION), G_TYPE_INT64, duration, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_query_parse_duration:
|
|
* @query: a #GstQuery
|
|
* @format: the storage for the #GstFormat of the duration value, or NULL.
|
|
* @duration: the storage for the total duration, or NULL.
|
|
*
|
|
* Parse a duration query answer. Write the format of the duration into @format,
|
|
* and the value into @duration, if the respective variables are non-NULL.
|
|
*/
|
|
void
|
|
gst_query_parse_duration (GstQuery * query, GstFormat * format,
|
|
gint64 * duration)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_DURATION);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
if (format)
|
|
*format = g_value_get_enum (gst_structure_id_get_value (structure,
|
|
GST_QUARK (FORMAT)));
|
|
if (duration)
|
|
*duration = g_value_get_int64 (gst_structure_id_get_value (structure,
|
|
GST_QUARK (DURATION)));
|
|
}
|
|
|
|
/**
|
|
* gst_query_new_latency:
|
|
*
|
|
* Constructs a new latency query object.
|
|
* Use gst_query_unref() when done with it. A latency query is usually performed
|
|
* by sinks to compensate for additional latency introduced by elements in the
|
|
* pipeline.
|
|
*
|
|
* Returns: A #GstQuery
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
GstQuery *
|
|
gst_query_new_latency (void)
|
|
{
|
|
GstQuery *query;
|
|
GstStructure *structure;
|
|
|
|
structure = gst_structure_empty_new ("GstQueryLatency");
|
|
gst_structure_set (structure,
|
|
"live", G_TYPE_BOOLEAN, FALSE,
|
|
"min-latency", G_TYPE_UINT64, (gint64) 0,
|
|
"max-latency", G_TYPE_UINT64, (gint64) - 1, NULL);
|
|
|
|
query = gst_query_new (GST_QUERY_LATENCY, structure);
|
|
|
|
return query;
|
|
}
|
|
|
|
/**
|
|
* gst_query_set_latency:
|
|
* @query: a #GstQuery
|
|
* @live: if there is a live element upstream
|
|
* @min_latency: the minimal latency of the live element
|
|
* @max_latency: the maximal latency of the live element
|
|
*
|
|
* Answer a latency query by setting the requested values in the given format.
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
void
|
|
gst_query_set_latency (GstQuery * query, gboolean live,
|
|
GstClockTime min_latency, GstClockTime max_latency)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_LATENCY);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
gst_structure_set (structure,
|
|
"live", G_TYPE_BOOLEAN, live,
|
|
"min-latency", G_TYPE_UINT64, min_latency,
|
|
"max-latency", G_TYPE_UINT64, max_latency, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_query_parse_latency:
|
|
* @query: a #GstQuery
|
|
* @live: storage for live or NULL
|
|
* @min_latency: the storage for the min latency or NULL
|
|
* @max_latency: the storage for the max latency or NULL
|
|
*
|
|
* Parse a latency query answer.
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
void
|
|
gst_query_parse_latency (GstQuery * query, gboolean * live,
|
|
GstClockTime * min_latency, GstClockTime * max_latency)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_LATENCY);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
if (live)
|
|
*live = g_value_get_boolean (gst_structure_get_value (structure, "live"));
|
|
if (min_latency)
|
|
*min_latency = g_value_get_uint64 (gst_structure_get_value (structure,
|
|
"min-latency"));
|
|
if (max_latency)
|
|
*max_latency = g_value_get_uint64 (gst_structure_get_value (structure,
|
|
"max-latency"));
|
|
}
|
|
|
|
/**
|
|
* gst_query_new_convert:
|
|
* @src_format: the source #GstFormat for the new query
|
|
* @value: the value to convert
|
|
* @dest_format: the target #GstFormat
|
|
*
|
|
* Constructs a new convert query object. Use gst_query_unref()
|
|
* when done with it. A convert query is used to ask for a conversion between
|
|
* one format and another.
|
|
*
|
|
* Returns: A #GstQuery
|
|
*/
|
|
GstQuery *
|
|
gst_query_new_convert (GstFormat src_format, gint64 value,
|
|
GstFormat dest_format)
|
|
{
|
|
GstQuery *query;
|
|
GstStructure *structure;
|
|
|
|
g_return_val_if_fail (value >= 0, NULL);
|
|
|
|
structure = gst_structure_empty_new ("GstQueryConvert");
|
|
gst_structure_id_set (structure,
|
|
GST_QUARK (SRC_FORMAT), GST_TYPE_FORMAT, src_format,
|
|
GST_QUARK (SRC_VALUE), G_TYPE_INT64, value,
|
|
GST_QUARK (DEST_FORMAT), GST_TYPE_FORMAT, dest_format,
|
|
GST_QUARK (DEST_VALUE), G_TYPE_INT64, (gint64) - 1, NULL);
|
|
|
|
query = gst_query_new (GST_QUERY_CONVERT, structure);
|
|
|
|
return query;
|
|
}
|
|
|
|
/**
|
|
* gst_query_set_convert:
|
|
* @query: a #GstQuery
|
|
* @src_format: the source #GstFormat
|
|
* @src_value: the source value
|
|
* @dest_format: the destination #GstFormat
|
|
* @dest_value: the destination value
|
|
*
|
|
* Answer a convert query by setting the requested values.
|
|
*/
|
|
void
|
|
gst_query_set_convert (GstQuery * query, GstFormat src_format, gint64 src_value,
|
|
GstFormat dest_format, gint64 dest_value)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_CONVERT);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
gst_structure_id_set (structure,
|
|
GST_QUARK (SRC_FORMAT), GST_TYPE_FORMAT, src_format,
|
|
GST_QUARK (SRC_VALUE), G_TYPE_INT64, src_value,
|
|
GST_QUARK (DEST_FORMAT), GST_TYPE_FORMAT, dest_format,
|
|
GST_QUARK (DEST_VALUE), G_TYPE_INT64, (gint64) dest_value, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_query_parse_convert:
|
|
* @query: a #GstQuery
|
|
* @src_format: the storage for the #GstFormat of the source value, or NULL
|
|
* @src_value: the storage for the source value, or NULL
|
|
* @dest_format: the storage for the #GstFormat of the destination value, or NULL
|
|
* @dest_value: the storage for the destination value, or NULL
|
|
*
|
|
* Parse a convert query answer. Any of @src_format, @src_value, @dest_format,
|
|
* and @dest_value may be NULL, in which case that value is omitted.
|
|
*/
|
|
void
|
|
gst_query_parse_convert (GstQuery * query, GstFormat * src_format,
|
|
gint64 * src_value, GstFormat * dest_format, gint64 * dest_value)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_CONVERT);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
if (src_format)
|
|
*src_format = g_value_get_enum (gst_structure_id_get_value (structure,
|
|
GST_QUARK (SRC_FORMAT)));
|
|
if (src_value)
|
|
*src_value = g_value_get_int64 (gst_structure_id_get_value (structure,
|
|
GST_QUARK (SRC_VALUE)));
|
|
if (dest_format)
|
|
*dest_format = g_value_get_enum (gst_structure_id_get_value (structure,
|
|
GST_QUARK (DEST_FORMAT)));
|
|
if (dest_value)
|
|
*dest_value = g_value_get_int64 (gst_structure_id_get_value (structure,
|
|
GST_QUARK (DEST_VALUE)));
|
|
}
|
|
|
|
/**
|
|
* gst_query_new_segment:
|
|
* @format: the #GstFormat for the new query
|
|
*
|
|
* Constructs a new segment query object. Use gst_query_unref()
|
|
* when done with it. A segment query is used to discover information about the
|
|
* currently configured segment for playback.
|
|
*
|
|
* Returns: a #GstQuery
|
|
*/
|
|
GstQuery *
|
|
gst_query_new_segment (GstFormat format)
|
|
{
|
|
GstQuery *query;
|
|
GstStructure *structure;
|
|
|
|
structure = gst_structure_empty_new ("GstQuerySegment");
|
|
gst_structure_id_set (structure,
|
|
GST_QUARK (RATE), G_TYPE_DOUBLE, (gdouble) 0.0,
|
|
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
|
|
GST_QUARK (START_VALUE), G_TYPE_INT64, (gint64) - 1,
|
|
GST_QUARK (STOP_VALUE), G_TYPE_INT64, (gint64) - 1, NULL);
|
|
|
|
query = gst_query_new (GST_QUERY_SEGMENT, structure);
|
|
|
|
return query;
|
|
}
|
|
|
|
/**
|
|
* gst_query_set_segment:
|
|
* @query: a #GstQuery
|
|
* @rate: the rate of the segment
|
|
* @format: the #GstFormat of the segment values (@start_value and @stop_value)
|
|
* @start_value: the start value
|
|
* @stop_value: the stop value
|
|
*
|
|
* Answer a segment query by setting the requested values. The normal
|
|
* playback segment of a pipeline is 0 to duration at the default rate of
|
|
* 1.0. If a seek was performed on the pipeline to play a different
|
|
* segment, this query will return the range specified in the last seek.
|
|
*
|
|
* @start_value and @stop_value will respectively contain the configured
|
|
* playback range start and stop values expressed in @format.
|
|
* The values are always between 0 and the duration of the media and
|
|
* @start_value <= @stop_value. @rate will contain the playback rate. For
|
|
* negative rates, playback will actually happen from @stop_value to
|
|
* @start_value.
|
|
*/
|
|
void
|
|
gst_query_set_segment (GstQuery * query, gdouble rate, GstFormat format,
|
|
gint64 start_value, gint64 stop_value)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_SEGMENT);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
gst_structure_id_set (structure,
|
|
GST_QUARK (RATE), G_TYPE_DOUBLE, rate,
|
|
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
|
|
GST_QUARK (START_VALUE), G_TYPE_INT64, start_value,
|
|
GST_QUARK (STOP_VALUE), G_TYPE_INT64, stop_value, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_query_parse_segment:
|
|
* @query: a #GstQuery
|
|
* @rate: the storage for the rate of the segment, or NULL
|
|
* @format: the storage for the #GstFormat of the values, or NULL
|
|
* @start_value: the storage for the start value, or NULL
|
|
* @stop_value: the storage for the stop value, or NULL
|
|
*
|
|
* Parse a segment query answer. Any of @rate, @format, @start_value, and
|
|
* @stop_value may be NULL, which will cause this value to be omitted.
|
|
*
|
|
* See gst_query_set_segment() for an explanation of the function arguments.
|
|
*/
|
|
void
|
|
gst_query_parse_segment (GstQuery * query, gdouble * rate, GstFormat * format,
|
|
gint64 * start_value, gint64 * stop_value)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_SEGMENT);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
if (rate)
|
|
*rate = g_value_get_double (gst_structure_id_get_value (structure,
|
|
GST_QUARK (RATE)));
|
|
if (format)
|
|
*format = g_value_get_enum (gst_structure_id_get_value (structure,
|
|
GST_QUARK (FORMAT)));
|
|
if (start_value)
|
|
*start_value = g_value_get_int64 (gst_structure_id_get_value (structure,
|
|
GST_QUARK (START_VALUE)));
|
|
if (stop_value)
|
|
*stop_value = g_value_get_int64 (gst_structure_id_get_value (structure,
|
|
GST_QUARK (STOP_VALUE)));
|
|
}
|
|
|
|
/**
|
|
* gst_query_new_application:
|
|
* @type: the query type
|
|
* @structure: a structure for the query
|
|
*
|
|
* Constructs a new custom application query object. Use gst_query_unref()
|
|
* when done with it.
|
|
*
|
|
* Returns: a #GstQuery
|
|
*/
|
|
GstQuery *
|
|
gst_query_new_application (GstQueryType type, GstStructure * structure)
|
|
{
|
|
g_return_val_if_fail (gst_query_type_get_details (type) != NULL, NULL);
|
|
g_return_val_if_fail (structure != NULL, NULL);
|
|
|
|
return gst_query_new (type, structure);
|
|
}
|
|
|
|
/**
|
|
* gst_query_get_structure:
|
|
* @query: a #GstQuery
|
|
*
|
|
* Get the structure of a query.
|
|
*
|
|
* Returns: The #GstStructure of the query. The structure is still owned
|
|
* by the query and will therefore be freed when the query is unreffed.
|
|
*/
|
|
GstStructure *
|
|
gst_query_get_structure (GstQuery * query)
|
|
{
|
|
g_return_val_if_fail (GST_IS_QUERY (query), NULL);
|
|
|
|
return query->structure;
|
|
}
|
|
|
|
/**
|
|
* gst_query_new_seeking (GstFormat *format)
|
|
* @format: the default #GstFormat for the new query
|
|
*
|
|
* Constructs a new query object for querying seeking properties of
|
|
* the stream.
|
|
*
|
|
* Returns: A #GstQuery
|
|
*/
|
|
GstQuery *
|
|
gst_query_new_seeking (GstFormat format)
|
|
{
|
|
GstQuery *query;
|
|
GstStructure *structure;
|
|
|
|
structure = gst_structure_empty_new ("GstQuerySeeking");
|
|
gst_structure_id_set (structure,
|
|
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
|
|
GST_QUARK (SEEKABLE), G_TYPE_BOOLEAN, FALSE,
|
|
GST_QUARK (SEGMENT_START), G_TYPE_INT64, (gint64) - 1,
|
|
GST_QUARK (SEGMENT_END), G_TYPE_INT64, (gint64) - 1, NULL);
|
|
|
|
query = gst_query_new (GST_QUERY_SEEKING, structure);
|
|
|
|
return query;
|
|
}
|
|
|
|
/**
|
|
* gst_query_set_seeking:
|
|
* @query: a #GstQuery
|
|
* @format: the format to set for the @segment_start and @segment_end values
|
|
* @seekable: the seekable flag to set
|
|
* @segment_start: the segment_start to set
|
|
* @segment_end: the segment_end to set
|
|
*
|
|
* Set the seeking query result fields in @query.
|
|
*/
|
|
void
|
|
gst_query_set_seeking (GstQuery * query, GstFormat format,
|
|
gboolean seekable, gint64 segment_start, gint64 segment_end)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_SEEKING);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
gst_structure_id_set (structure,
|
|
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
|
|
GST_QUARK (SEEKABLE), G_TYPE_BOOLEAN, seekable,
|
|
GST_QUARK (SEGMENT_START), G_TYPE_INT64, segment_start,
|
|
GST_QUARK (SEGMENT_END), G_TYPE_INT64, segment_end, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_query_parse_seeking:
|
|
* @query: a GST_QUERY_SEEKING type query #GstQuery
|
|
* @format: the format to set for the @segment_start and @segment_end values
|
|
* @seekable: the seekable flag to set
|
|
* @segment_start: the segment_start to set
|
|
* @segment_end: the segment_end to set
|
|
*
|
|
* Parse a seeking query, writing the format into @format, and
|
|
* other results into the passed parameters, if the respective parameters
|
|
* are non-NULL
|
|
*/
|
|
void
|
|
gst_query_parse_seeking (GstQuery * query, GstFormat * format,
|
|
gboolean * seekable, gint64 * segment_start, gint64 * segment_end)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_SEEKING);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
if (format)
|
|
*format = g_value_get_enum (gst_structure_id_get_value (structure,
|
|
GST_QUARK (FORMAT)));
|
|
if (seekable)
|
|
*seekable = g_value_get_boolean (gst_structure_id_get_value (structure,
|
|
GST_QUARK (SEEKABLE)));
|
|
if (segment_start)
|
|
*segment_start = g_value_get_int64 (gst_structure_id_get_value (structure,
|
|
GST_QUARK (SEGMENT_START)));
|
|
if (segment_end)
|
|
*segment_end = g_value_get_int64 (gst_structure_id_get_value (structure,
|
|
GST_QUARK (SEGMENT_END)));
|
|
}
|
|
|
|
/**
|
|
* gst_query_new_formats:
|
|
*
|
|
* Constructs a new query object for querying formats of
|
|
* the stream.
|
|
*
|
|
* Returns: A #GstQuery
|
|
*
|
|
* Since: 0.10.4
|
|
*/
|
|
GstQuery *
|
|
gst_query_new_formats (void)
|
|
{
|
|
GstQuery *query;
|
|
GstStructure *structure;
|
|
|
|
structure = gst_structure_new ("GstQueryFormats", NULL);
|
|
query = gst_query_new (GST_QUERY_FORMATS, structure);
|
|
|
|
return query;
|
|
}
|
|
|
|
static void
|
|
gst_query_list_add_format (GValue * list, GstFormat format)
|
|
{
|
|
GValue item = { 0, };
|
|
|
|
g_value_init (&item, GST_TYPE_FORMAT);
|
|
g_value_set_enum (&item, format);
|
|
gst_value_list_append_value (list, &item);
|
|
g_value_unset (&item);
|
|
}
|
|
|
|
/**
|
|
* gst_query_set_formats:
|
|
* @query: a #GstQuery
|
|
* @n_formats: the number of formats to set.
|
|
* @...: A number of @GstFormats equal to @n_formats.
|
|
*
|
|
* Set the formats query result fields in @query. The number of formats passed
|
|
* must be equal to @n_formats.
|
|
*/
|
|
void
|
|
gst_query_set_formats (GstQuery * query, gint n_formats, ...)
|
|
{
|
|
va_list ap;
|
|
GValue list = { 0, };
|
|
GstStructure *structure;
|
|
gint i;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_FORMATS);
|
|
|
|
g_value_init (&list, GST_TYPE_LIST);
|
|
|
|
va_start (ap, n_formats);
|
|
for (i = 0; i < n_formats; i++) {
|
|
gst_query_list_add_format (&list, va_arg (ap, GstFormat));
|
|
}
|
|
va_end (ap);
|
|
|
|
structure = gst_query_get_structure (query);
|
|
gst_structure_set_value (structure, "formats", &list);
|
|
|
|
g_value_unset (&list);
|
|
|
|
}
|
|
|
|
/**
|
|
* gst_query_set_formatsv:
|
|
* @query: a #GstQuery
|
|
* @n_formats: the number of formats to set.
|
|
* @formats: An array containing @n_formats @GstFormat values.
|
|
*
|
|
* Set the formats query result fields in @query. The number of formats passed
|
|
* in the @formats array must be equal to @n_formats.
|
|
*
|
|
* Since: 0.10.4
|
|
*/
|
|
void
|
|
gst_query_set_formatsv (GstQuery * query, gint n_formats, GstFormat * formats)
|
|
{
|
|
GValue list = { 0, };
|
|
GstStructure *structure;
|
|
gint i;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_FORMATS);
|
|
|
|
g_value_init (&list, GST_TYPE_LIST);
|
|
for (i = 0; i < n_formats; i++) {
|
|
gst_query_list_add_format (&list, formats[i]);
|
|
}
|
|
structure = gst_query_get_structure (query);
|
|
gst_structure_set_value (structure, "formats", &list);
|
|
|
|
g_value_unset (&list);
|
|
}
|
|
|
|
/**
|
|
* gst_query_parse_formats_length:
|
|
* @query: a #GstQuery
|
|
* @n_formats: the number of formats in this query.
|
|
*
|
|
* Parse the number of formats in the formats @query.
|
|
*
|
|
* Since: 0.10.4
|
|
*/
|
|
void
|
|
gst_query_parse_formats_length (GstQuery * query, guint * n_formats)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_FORMATS);
|
|
|
|
if (n_formats) {
|
|
const GValue *list;
|
|
|
|
structure = gst_query_get_structure (query);
|
|
list = gst_structure_get_value (structure, "formats");
|
|
if (list == NULL)
|
|
*n_formats = 0;
|
|
else
|
|
*n_formats = gst_value_list_get_size (list);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_query_parse_formats_nth:
|
|
* @query: a #GstQuery
|
|
* @nth: the nth format to retrieve.
|
|
* @format: a pointer to store the nth format
|
|
*
|
|
* Parse the format query and retrieve the @nth format from it into
|
|
* @format. If the list contains less elements than @nth, @format will be
|
|
* set to GST_FORMAT_UNDEFINED.
|
|
*
|
|
* Since: 0.10.4
|
|
*/
|
|
void
|
|
gst_query_parse_formats_nth (GstQuery * query, guint nth, GstFormat * format)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_FORMATS);
|
|
|
|
if (format) {
|
|
const GValue *list;
|
|
|
|
structure = gst_query_get_structure (query);
|
|
list = gst_structure_get_value (structure, "formats");
|
|
if (list == NULL) {
|
|
*format = GST_FORMAT_UNDEFINED;
|
|
} else {
|
|
if (nth < gst_value_list_get_size (list)) {
|
|
*format = g_value_get_enum (gst_value_list_get_value (list, nth));
|
|
} else
|
|
*format = GST_FORMAT_UNDEFINED;
|
|
}
|
|
}
|
|
}
|