/**
* gst_query_new_buffering
* @format: the default #GstFormat for the new query
*
* Constructs a new query object for querying the buffering status of
* a stream.
*
* Returns: A #GstQuery
*
* Since: 0.10.20
*/
GstQuery *
gst_query_new_buffering (GstFormat format)
{
GstQuery *query;
GstStructure *structure;
structure = gst_structure_empty_new ("GstQueryBuffering");
/* by default, we configure the answer as no buffering with a 100% buffering
* progress */
gst_structure_id_set (structure,
GST_QUARK (BUSY), G_TYPE_BOOLEAN, FALSE,
GST_QUARK (BUFFER_PERCENT), G_TYPE_INT, 100,
GST_QUARK (BUFFERING_MODE), GST_TYPE_BUFFERING_MODE, GST_BUFFERING_STREAM,
GST_QUARK (AVG_IN_RATE), G_TYPE_INT, -1,
GST_QUARK (AVG_OUT_RATE), G_TYPE_INT, -1,
GST_QUARK (BUFFERING_LEFT), G_TYPE_INT64, G_GINT64_CONSTANT (0),
GST_QUARK (ESTIMATED_TOTAL), G_TYPE_INT64, G_GINT64_CONSTANT (-1),
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
GST_QUARK (START_VALUE), G_TYPE_INT64, G_GINT64_CONSTANT (-1),
GST_QUARK (STOP_VALUE), G_TYPE_INT64, G_GINT64_CONSTANT (-1), NULL);
query = gst_query_new (GST_QUERY_BUFFERING, structure);
return query;
}
/**
* 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_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;
}
/**
* 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_id_empty_new (GST_QUARK (QUERY_FORMATS));
query = gst_query_new (GST_QUERY_FORMATS, structure);
return query;
}
/**
* gst_query_new_uri:
*
* Constructs a new query URI query object. Use gst_query_unref()
* when done with it. An URI query is used to query the current URI
* that is used by the source or sink.
*
* Returns: A #GstQuery
*
* Since: 0.10.22
*/
GstQuery *
gst_query_new_uri (void)
{
GstQuery *query;
GstStructure *structure;
structure = gst_structure_id_new (GST_QUARK (QUERY_URI),
GST_QUARK (URI), G_TYPE_STRING, NULL, NULL);
query = gst_query_new (GST_QUERY_URI, structure);
return query;
}
/**
* 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_id_new (GST_QUARK (QUERY_DURATION),
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
GST_QUARK (DURATION), G_TYPE_INT64, G_GINT64_CONSTANT (-1), NULL);
query = gst_query_new (GST_QUERY_DURATION, structure);
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, G_GINT64_CONSTANT (-1), NULL);
query = gst_query_new (GST_QUERY_POSITION, structure);
return query;
}
/**
* 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_id_new (GST_QUARK (QUERY_LATENCY),
GST_QUARK (LIVE), G_TYPE_BOOLEAN, FALSE,
GST_QUARK (MIN_LATENCY), G_TYPE_UINT64, G_GUINT64_CONSTANT (0),
GST_QUARK (MAX_LATENCY), G_TYPE_UINT64, G_GUINT64_CONSTANT (-1), NULL);
query = gst_query_new (GST_QUERY_LATENCY, structure);
return query;
}
/**
* gst_query_new_seeking:
* @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_id_new (GST_QUARK (QUERY_SEEKING),
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
GST_QUARK (SEEKABLE), G_TYPE_BOOLEAN, FALSE,
GST_QUARK (SEGMENT_START), G_TYPE_INT64, G_GINT64_CONSTANT (-1),
GST_QUARK (SEGMENT_END), G_TYPE_INT64, G_GINT64_CONSTANT (-1), NULL);
query = gst_query_new (GST_QUERY_SEEKING, structure);
return query;
}
/**
* 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_id_new (GST_QUARK (QUERY_SEGMENT),
GST_QUARK (RATE), G_TYPE_DOUBLE, (gdouble) 0.0,
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
GST_QUARK (START_VALUE), G_TYPE_INT64, G_GINT64_CONSTANT (-1),
GST_QUARK (STOP_VALUE), G_TYPE_INT64, G_GINT64_CONSTANT (-1), NULL);
query = gst_query_new (GST_QUERY_SEGMENT, structure);
return query;
}
/**
* 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;
structure = gst_structure_id_new (GST_QUARK (QUERY_CONVERT),
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, G_GINT64_CONSTANT (-1), NULL);
query = gst_query_new (GST_QUERY_CONVERT, structure);
return query;
}
/**
* 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, G_GINT64_CONSTANT (-1), NULL);
query = gst_query_new (GST_QUERY_CONVERT, structure);
return query;
}
