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gst/gstquery.*: More documentation.
Original commit message from CVS: * gst/gstquery.c: (gst_query_new_segment), (gst_query_set_segment), (gst_query_parse_segment): * gst/gstquery.h: More documentation. Add segment query for future use.
This commit is contained in:
Wim Taymans
parent
4793bc208d
commit
1901cd0471
3 changed files with 151 additions and 4 deletions
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@ -1,3 +1,11 @@
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2005-09-22 Wim Taymans <wim@fluendo.com>
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* gst/gstquery.c: (gst_query_new_segment), (gst_query_set_segment),
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(gst_query_parse_segment):
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* gst/gstquery.h:
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More documentation.
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Add segment query for future use.
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2005-09-22 Wim Taymans <wim@fluendo.com>
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* gst/gstbin.c: (gst_bin_add_func):
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140
gst/gstquery.c
140
gst/gstquery.c
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@ -52,11 +52,12 @@ static GHashTable *_query_type_to_nick = NULL;
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static guint32 _n_values = 1; /* we start from 1 because 0 reserved for NONE */
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static GstQueryTypeDefinition standard_definitions[] = {
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{GST_QUERY_POSITION, "position", "Current Position"},
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{GST_QUERY_POSITION, "position", "Current position and total duration"},
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{GST_QUERY_LATENCY, "latency", "Latency"},
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{GST_QUERY_JITTER, "jitter", "Jitter"},
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{GST_QUERY_RATE, "rate", "Configured rate 1000000 = 1"},
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{GST_QUERY_SEEKING, "seeking", "Seeking capabilities and parameters"},
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{GST_QUERY_SEGMENT, "segment", "currently configured segment"},
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{GST_QUERY_CONVERT, "convert", "Converting between formats"},
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{GST_QUERY_FORMATS, "formats", "Supported formats for conversion"},
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{0, NULL, NULL}
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@ -368,9 +369,8 @@ gst_query_set_position (GstQuery * query, GstFormat format,
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/**
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* gst_query_parse_position:
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* @query: the query to fill in
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* @format: the requested #GstFormat or NULL for the default (used when creating
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* the query)
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* @query: the query to parse
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* @format: the storage for the #GstFormat of the position values
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* @cur: the storage for the current position
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* @end: the storage for the end position
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*
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@ -393,6 +393,17 @@ gst_query_parse_position (GstQuery * query, GstFormat * format,
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*end = g_value_get_int64 (gst_structure_get_value (structure, "end"));
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}
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/**
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* gst_query_new_convert:
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* @src_fmt: the source #GstFormat for the new query
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* @value: the value to convert
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* @dest_fmt: the target #GstFormat
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*
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* Constructs a new query convert object. Use gst_query_unref()
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* when done with it.
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*
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* Returns: A new #GstQuery
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*/
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GstQuery *
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gst_query_new_convert (GstFormat src_fmt, gint64 value, GstFormat dest_fmt)
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{
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@ -411,6 +422,16 @@ gst_query_new_convert (GstFormat src_fmt, gint64 value, GstFormat dest_fmt)
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return query;
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}
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/**
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* gst_query_set_convert:
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* @query: the query to fill in
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* @src_format: the source #GstFormat
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* @src_value: the source value
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* @dest_format: the destination #GstFormat
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* @dest_value: the destination value
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*
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* Answer a convert query by setting the requested values.
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*/
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void
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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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@ -427,6 +448,16 @@ gst_query_set_convert (GstQuery * query, GstFormat src_format, gint64 src_value,
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"dest_value", G_TYPE_INT64, dest_value, NULL);
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}
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/**
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* gst_query_parse_convert:
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* @query: the query to parse
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* @src_format: the storage for the #GstFormat of the source value
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* @src_value: the storage for the source value
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* @dest_format: the storage for the #GstFormat of the destination value
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* @dest_value: the storage for the destination value
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*
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* Parse a convert query answer.
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*/
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void
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gst_query_parse_convert (GstQuery * query, GstFormat * src_format,
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gint64 * src_value, GstFormat * dest_format, gint64 * dest_value)
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@ -450,7 +481,99 @@ gst_query_parse_convert (GstQuery * query, GstFormat * src_format,
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g_value_get_int64 (gst_structure_get_value (structure, "dest_value"));
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}
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/**
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* gst_query_new_segment:
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* @format: the #GstFormat for the new query
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*
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* Constructs a new query segment object. Use gst_query_unref()
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* when done with it.
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*
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* Returns: A new #GstQuery
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*/
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GstQuery *
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gst_query_new_segment (GstFormat format)
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{
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GstQuery *query;
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GstStructure *structure;
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structure = gst_structure_new ("GstQuerySegment",
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"format", GST_TYPE_FORMAT, format, NULL);
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query = gst_query_new (GST_QUERY_SEGMENT, structure);
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return query;
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}
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/**
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* gst_query_set_segment:
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* @query: the query to fill in
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* @rate: the rate of the segment
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* @format: the #GstFormat of the segment values
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* @start_value: the start value
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* @stop_value: the stop value
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* @base: the base value
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*
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* Answer a segment query by setting the requested values.
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*/
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void
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gst_query_set_segment (GstQuery * query, gdouble rate, GstFormat format,
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gint64 start_value, gint64 stop_value, gint64 base)
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{
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GstStructure *structure;
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g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_SEGMENT);
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structure = gst_query_get_structure (query);
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gst_structure_set (structure,
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"rate", G_TYPE_DOUBLE, rate,
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"format", GST_TYPE_FORMAT, format,
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"start_value", G_TYPE_INT64, start_value,
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"stop_value", G_TYPE_INT64, stop_value, "base", G_TYPE_INT64, base, NULL);
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}
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/**
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* gst_query_parse_segment:
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* @query: the query to parse
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* @rate: the storage for the rate of the segment
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* @format: the storage for the #GstFormat of the values
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* @start_value: the storage for the start value
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* @stop_value: the storage for the stop value
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* @base: the storage for the base value
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*
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* Parse a segment query answer.
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*/
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void
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gst_query_parse_segment (GstQuery * query, gdouble * rate, GstFormat * format,
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gint64 * start_value, gint64 * stop_value, gint64 * base)
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{
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GstStructure *structure;
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g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_SEGMENT);
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structure = gst_query_get_structure (query);
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if (rate)
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*rate = g_value_get_double (gst_structure_get_value (structure, "rate"));
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if (format)
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*format = g_value_get_enum (gst_structure_get_value (structure, "format"));
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if (start_value)
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*start_value =
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g_value_get_int64 (gst_structure_get_value (structure, "start_value"));
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if (stop_value)
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*stop_value =
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g_value_get_int64 (gst_structure_get_value (structure, "stop_value"));
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if (base)
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*base = g_value_get_int64 (gst_structure_get_value (structure, "base"));
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}
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/**
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* gst_query_new_application:
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* @type: the query type
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* @structure: a structure for the query
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*
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* Constructs a new custom application query object. Use gst_query_unref()
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* when done with it.
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*
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* Returns: A new #GstQuery
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*/
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GstQuery *
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gst_query_new_application (GstQueryType type, GstStructure * structure)
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{
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@ -460,6 +583,15 @@ gst_query_new_application (GstQueryType type, GstStructure * structure)
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return gst_query_new (type, structure);
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}
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/**
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* gst_query_get_structure:
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* @query: the query to parse
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*
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* Get the structure of a query.
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*
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* Returns: The #GstStructure of the query. The structure is still owned
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* by the query and will therefore be freed when the query is unreffed.
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*/
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GstStructure *
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gst_query_get_structure (GstQuery * query)
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{
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@ -152,6 +152,13 @@ void gst_query_set_convert (GstQuery *query, GstFormat src_format, gint64 src_
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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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/* segment query */
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GstQuery* gst_query_new_segment (GstFormat format);
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void gst_query_set_segment (GstQuery *query, gdouble rate, GstFormat format,
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gint64 start_value, gint64 stop_value, gint64 base);
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void gst_query_parse_segment (GstQuery *query, gdouble *rate, GstFormat *format,
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gint64 *start_value, gint64 *stop_value, gint64 *base);
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/* application specific query */
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GstQuery * gst_query_new_application (GstQueryType type,
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