/**
* SECTION:gstquery
+ * @title: GstQuery
* @short_description: Provide functions to create queries, and to set and parse
* values in them.
* @see_also: #GstPad, #GstElement
* gst_query_parse_*() 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 2012-03-29 (0.11.3)
+ * |[<!-- language="C" -->
+ * 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);
+ * ]|
*/
GST_DEBUG_CATEGORY_STATIC (gst_query_debug);
#define GST_CAT_DEFAULT gst_query_debug
-static GType _gst_query_type = 0;
+GType _gst_query_type = 0;
typedef struct
{
{GST_QUERY_CAPS, "caps", 0},
{GST_QUERY_DRAIN, "drain", 0},
{GST_QUERY_CONTEXT, "context", 0},
+ {GST_QUERY_BITRATE, "bitrate", 0},
{0, NULL, 0}
};
gst_structure_set_parent_refcount (s, NULL);
gst_structure_free (s);
}
+#ifdef USE_POISONING
+ memset (query, 0xff, sizeof (GstQueryImpl));
+#endif
g_slice_free1 (sizeof (GstQueryImpl), query);
}
* when done with it. A position query is used to query the current position
* of playback in the streams, in some format.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
* gst_query_parse_position:
* @query: a #GstQuery
* @format: (out) (allow-none): the storage for the #GstFormat of the
- * position values (may be NULL)
- * @cur: (out) (allow-none): the storage for the current position (may be NULL)
+ * position values (may be %NULL)
+ * @cur: (out) (allow-none): 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.
+ * into @cur, if the respective parameters are non-%NULL.
*/
void
gst_query_parse_position (GstQuery * query, GstFormat * format, gint64 * cur)
* Use gst_query_unref() when done with it. A duration query will give the
* total length of the stream.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
* gst_query_parse_duration:
* @query: a #GstQuery
* @format: (out) (allow-none): the storage for the #GstFormat of the duration
- * value, or NULL.
- * @duration: (out) (allow-none): the storage for the total duration, or NULL.
+ * value, or %NULL.
+ * @duration: (out) (allow-none): 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.
+ * and the value into @duration, if the respective variables are non-%NULL.
*/
void
gst_query_parse_duration (GstQuery * query, GstFormat * format,
* by sinks to compensate for additional latency introduced by elements in the
* pipeline.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a #GstQuery
*/
structure = gst_structure_new_id (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);
+ GST_QUARK (MAX_LATENCY), G_TYPE_UINT64, GST_CLOCK_TIME_NONE, NULL);
query = gst_query_new_custom (GST_QUERY_LATENCY, structure);
GstStructure *structure;
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_LATENCY);
+ g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency));
structure = GST_QUERY_STRUCTURE (query);
gst_structure_id_set (structure,
/**
* gst_query_parse_latency:
* @query: a #GstQuery
- * @live: (out) (allow-none): storage for live or NULL
- * @min_latency: (out) (allow-none): the storage for the min latency or NULL
- * @max_latency: (out) (allow-none): the storage for the max latency or NULL
+ * @live: (out) (allow-none): storage for live or %NULL
+ * @min_latency: (out) (allow-none): the storage for the min latency or %NULL
+ * @max_latency: (out) (allow-none): the storage for the max latency or %NULL
*
* Parse a latency query answer.
*/
* when done with it. A convert query is used to ask for a conversion between
* one format and another.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a #GstQuery
*/
* gst_query_parse_convert:
* @query: a #GstQuery
* @src_format: (out) (allow-none): the storage for the #GstFormat of the
- * source value, or NULL
- * @src_value: (out) (allow-none): the storage for the source value, or NULL
+ * source value, or %NULL
+ * @src_value: (out) (allow-none): the storage for the source value, or %NULL
* @dest_format: (out) (allow-none): the storage for the #GstFormat of the
- * destination value, or NULL
+ * destination value, or %NULL
* @dest_value: (out) (allow-none): the storage for the destination value,
- * or NULL
+ * 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.
+ * and @dest_value may be %NULL, in which case that value is omitted.
*/
void
gst_query_parse_convert (GstQuery * query, GstFormat * src_format,
* when done with it. A segment query is used to discover information about the
* currently configured segment for playback.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
/**
* gst_query_parse_segment:
* @query: a #GstQuery
- * @rate: (out) (allow-none): the storage for the rate of the segment, or NULL
+ * @rate: (out) (allow-none): the storage for the rate of the segment, or %NULL
* @format: (out) (allow-none): the storage for the #GstFormat of the values,
- * or NULL
- * @start_value: (out) (allow-none): the storage for the start value, or NULL
- * @stop_value: (out) (allow-none): the storage for the stop value, or NULL
+ * or %NULL
+ * @start_value: (out) (allow-none): the storage for the start value, or %NULL
+ * @stop_value: (out) (allow-none): 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.
+ * @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.
*/
/**
* gst_query_new_custom:
* @type: the query type
- * @structure: a structure for the query
+ * @structure: (allow-none) (transfer full): a structure for the query
*
* Constructs a new custom query object. Use gst_query_unref()
* when done with it.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
- * Returns: (transfer full): a new #GstQuery
+ * Returns: (transfer full) (nullable): a new #GstQuery
*/
GstQuery *
gst_query_new_custom (GstQueryType type, GstStructure * structure)
*
* Get the structure of a query.
*
- * Returns: (transfer none): the #GstStructure of the query. The structure is
- * still owned by the query and will therefore be freed when the query
- * is unreffed.
+ * Returns: (transfer none) (nullable): the #GstStructure of the query. The
+ * structure is still owned by the query and will therefore be freed when the
+ * query is unreffed.
*/
const GstStructure *
gst_query_get_structure (GstQuery * query)
* @query: a #GstQuery
*
* Get the structure of a query. This method should be called with a writable
- * @query so that the returned structure is guranteed to be writable.
+ * @query so that the returned structure is guaranteed to be writable.
*
* Returns: (transfer none): the #GstStructure of the query. The structure is
* still owned by the query and will therefore be freed when the query
GstStructure *
gst_query_writable_structure (GstQuery * query)
{
+ GstStructure *structure;
+
g_return_val_if_fail (GST_IS_QUERY (query), NULL);
g_return_val_if_fail (gst_query_is_writable (query), NULL);
- return GST_QUERY_STRUCTURE (query);
+ structure = GST_QUERY_STRUCTURE (query);
+
+ if (structure == NULL) {
+ structure =
+ gst_structure_new_id_empty (gst_query_type_to_quark (GST_QUERY_TYPE
+ (query)));
+ gst_structure_set_parent_refcount (structure, &query->mini_object.refcount);
+ GST_QUERY_STRUCTURE (query) = structure;
+ }
+ return structure;
}
/**
* Constructs a new query object for querying seeking properties of
* the stream.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
* gst_query_parse_seeking:
* @query: a GST_QUERY_SEEKING type query #GstQuery
* @format: (out) (allow-none): the format to set for the @segment_start
- * and @segment_end values, or NULL
- * @seekable: (out) (allow-none): the seekable flag to set, or NULL
- * @segment_start: (out) (allow-none): the segment_start to set, or NULL
- * @segment_end: (out) (allow-none): the segment_end to set, or NULL
+ * and @segment_end values, or %NULL
+ * @seekable: (out) (allow-none): the seekable flag to set, or %NULL
+ * @segment_start: (out) (allow-none): the segment_start to set, or %NULL
+ * @segment_end: (out) (allow-none): the segment_end to set, or %NULL
*
* Parse a seeking query, writing the format into @format, and
* other results into the passed parameters, if the respective parameters
- * are non-NULL
+ * are non-%NULL
*/
void
gst_query_parse_seeking (GstQuery * query, GstFormat * format,
* Constructs a new query object for querying formats of
* the stream.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
/**
* gst_query_parse_nth_format:
* @query: a #GstQuery
- * @nth: (out): the nth format to retrieve.
+ * @nth: the nth format to retrieve.
* @format: (out) (allow-none): a pointer to store the nth format
*
* Parse the format query and retrieve the @nth format from it into
* Constructs a new query object for querying the buffering status of
* a stream.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
/**
* gst_query_parse_buffering_percent:
* @query: A valid #GstQuery of type GST_QUERY_BUFFERING.
- * @busy: (out) (allow-none): if buffering is busy, or NULL
- * @percent: (out) (allow-none): a buffering percent, or NULL
+ * @busy: (out) (allow-none): if buffering is busy, or %NULL
+ * @percent: (out) (allow-none): a buffering percent, or %NULL
*
* Get the percentage of buffered data. This is a value between 0 and 100.
* The @busy indicator is %TRUE when the buffering is in progress.
/**
* gst_query_parse_buffering_stats:
* @query: A valid #GstQuery of type GST_QUERY_BUFFERING.
- * @mode: (out) (allow-none): a buffering mode, or NULL
- * @avg_in: (out) (allow-none): the average input rate, or NULL
- * @avg_out: (out) (allow-none): the average output rat, or NULLe
+ * @mode: (out) (allow-none): a buffering mode, or %NULL
+ * @avg_in: (out) (allow-none): the average input rate, or %NULL
+ * @avg_out: (out) (allow-none): the average output rat, or %NULL
* @buffering_left: (out) (allow-none): amount of buffering time left in
- * milliseconds, or NULL
+ * milliseconds, or %NULL
*
* Extracts the buffering stats values from @query.
*/
* @start: the start to set
* @stop: the stop to set
* @estimated_total: estimated total amount of download time remaining in
- * miliseconds
+ * milliseconds
*
* Set the available query result fields in @query.
*/
* gst_query_parse_buffering_range:
* @query: a GST_QUERY_BUFFERING type query #GstQuery
* @format: (out) (allow-none): the format to set for the @segment_start
- * and @segment_end values, or NULL
- * @start: (out) (allow-none): the start to set, or NULL
- * @stop: (out) (allow-none): the stop to set, or NULL
+ * and @segment_end values, or %NULL
+ * @start: (out) (allow-none): the start to set, or %NULL
+ * @stop: (out) (allow-none): the stop to set, or %NULL
* @estimated_total: (out) (allow-none): estimated total amount of download
- * time remaining in miliseconds, or NULL
+ * time remaining in milliseconds, or %NULL
*
* Parse an available query, writing the format into @format, and
* other results into the passed parameters, if the respective parameters
- * are non-NULL
+ * are non-%NULL
*/
void
gst_query_parse_buffering_range (GstQuery * query, GstFormat * format,
* gst_query_parse_nth_buffering_range:
* @query: a GST_QUERY_BUFFERING type query #GstQuery
* @index: position in the buffered-ranges array to read
- * @start: (out) (allow-none): the start position to set, or NULL
- * @stop: (out) (allow-none): the stop position to set, or NULL
+ * @start: (out) (allow-none): the start position to set, or %NULL
+ * @stop: (out) (allow-none): the stop position to set, or %NULL
*
* Parse an available query and get the start and stop values stored
* at the @index of the buffered ranges array.
* when done with it. An URI query is used to query the current URI
* that is used by the source or sink.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
/**
* gst_query_parse_uri:
* @query: a #GstQuery
- * @uri: (out callee-allocates) (allow-none): the storage for the current URI
- * (may be NULL)
+ * @uri: (out) (transfer full) (allow-none): the storage for the current URI
+ * (may be %NULL)
*
* Parse an URI query, writing the URI into @uri as a newly
- * allocated string, if the respective parameters are non-NULL.
+ * allocated string, if the respective parameters are non-%NULL.
* Free the string with g_free() after usage.
*/
void
}
/**
+ * gst_query_set_uri_redirection:
+ * @query: a #GstQuery with query type GST_QUERY_URI
+ * @uri: the URI to set
+ *
+ * Answer a URI query by setting the requested URI redirection.
+ *
+ * Since: 1.2
+ */
+void
+gst_query_set_uri_redirection (GstQuery * query, const gchar * uri)
+{
+ GstStructure *structure;
+
+ g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_URI);
+ g_return_if_fail (gst_query_is_writable (query));
+ g_return_if_fail (gst_uri_is_valid (uri));
+
+ structure = GST_QUERY_STRUCTURE (query);
+ gst_structure_id_set (structure, GST_QUARK (URI_REDIRECTION),
+ G_TYPE_STRING, uri, NULL);
+}
+
+/**
+ * gst_query_parse_uri_redirection:
+ * @query: a #GstQuery
+ * @uri: (out) (transfer full) (allow-none): the storage for the redirect URI
+ * (may be %NULL)
+ *
+ * Parse an URI query, writing the URI into @uri as a newly
+ * allocated string, if the respective parameters are non-%NULL.
+ * Free the string with g_free() after usage.
+ *
+ * Since: 1.2
+ */
+void
+gst_query_parse_uri_redirection (GstQuery * query, gchar ** uri)
+{
+ GstStructure *structure;
+
+ g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_URI);
+
+ structure = GST_QUERY_STRUCTURE (query);
+ if (uri) {
+ if (!gst_structure_id_get (structure, GST_QUARK (URI_REDIRECTION),
+ G_TYPE_STRING, uri, NULL))
+ *uri = NULL;
+ }
+}
+
+/**
+ * gst_query_set_uri_redirection_permanent:
+ * @query: a #GstQuery with query type %GST_QUERY_URI
+ * @permanent: whether the redirect is permanent or not
+ *
+ * Answer a URI query by setting the requested URI redirection
+ * to permanent or not.
+ *
+ * Since: 1.4
+ */
+void
+gst_query_set_uri_redirection_permanent (GstQuery * query, gboolean permanent)
+{
+ GstStructure *structure;
+
+ g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_URI);
+ g_return_if_fail (gst_query_is_writable (query));
+
+ structure = GST_QUERY_STRUCTURE (query);
+ gst_structure_id_set (structure, GST_QUARK (URI_REDIRECTION_PERMANENT),
+ G_TYPE_BOOLEAN, permanent, NULL);
+}
+
+/**
+ * gst_query_parse_uri_redirection_permanent:
+ * @query: a #GstQuery
+ * @permanent: (out) (allow-none): if the URI redirection is permanent
+ * (may be %NULL)
+ *
+ * Parse an URI query, and set @permanent to %TRUE if there is a redirection
+ * and it should be considered permanent. If a redirection is permanent,
+ * applications should update their internal storage of the URI, otherwise
+ * they should make all future requests to the original URI.
+ *
+ * Since: 1.4
+ */
+void
+gst_query_parse_uri_redirection_permanent (GstQuery * query,
+ gboolean * permanent)
+{
+ GstStructure *structure;
+
+ g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_URI);
+
+ structure = GST_QUERY_STRUCTURE (query);
+ if (permanent) {
+ if (!gst_structure_id_get (structure, GST_QUARK (URI_REDIRECTION_PERMANENT),
+ G_TYPE_BOOLEAN, permanent, NULL))
+ *permanent = FALSE;
+ }
+}
+
+/**
* gst_query_new_allocation:
* @caps: the negotiated caps
* @need_pool: return a pool
*
* Constructs a new query object for querying the allocation properties.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
*
* Parse an allocation query, writing the requested caps in @caps and
* whether a pool is needed in @need_pool, if the respective parameters
- * are non-NULL.
+ * are non-%NULL.
+ *
+ * Pool details can be retrieved using gst_query_get_n_allocation_pools() and
+ * gst_query_parse_nth_allocation_pool().
*/
void
gst_query_parse_allocation (GstQuery * query, GstCaps ** caps,
/**
* gst_query_add_allocation_pool:
* @query: A valid #GstQuery of type GST_QUERY_ALLOCATION.
- * @pool: the #GstBufferPool
- * @size: the size
+ * @pool: (transfer none) (allow-none): the #GstBufferPool
+ * @size: the buffer size
* @min_buffers: the min buffers
* @max_buffers: the max buffers
*
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_ALLOCATION);
g_return_if_fail (gst_query_is_writable (query));
- g_return_if_fail (size != 0);
structure = GST_QUERY_STRUCTURE (query);
array = ensure_array (structure, GST_QUARK (POOL),
g_array_append_val (array, ap);
}
-
/**
* gst_query_get_n_allocation_pools:
* @query: a GST_QUERY_ALLOCATION type query #GstQuery
* @query: A valid #GstQuery of type GST_QUERY_ALLOCATION.
* @index: index to parse
* @pool: (out) (allow-none) (transfer full): the #GstBufferPool
- * @size: (out) (allow-none): the size
+ * @size: (out) (allow-none): the buffer size
* @min_buffers: (out) (allow-none): the min buffers
* @max_buffers: (out) (allow-none): the max buffers
*
* gst_query_set_nth_allocation_pool:
* @index: index to modify
* @query: A valid #GstQuery of type GST_QUERY_ALLOCATION.
- * @pool: the #GstBufferPool
- * @size: the size
+ * @pool: (transfer none) (allow-none): the #GstBufferPool
+ * @size: the buffer size
* @min_buffers: the min buffers
* @max_buffers: the max buffers
*
* gst_query_parse_nth_allocation_meta:
* @query: a GST_QUERY_ALLOCATION type query #GstQuery
* @index: position in the metadata API array to read
- * @params: (out) (allow-none): API specific flags
+ * @params: (out) (transfer none) (allow-none): API specific parameters
*
* Parse an available query and get the metadata API
* at @index of the metadata API array.
* gst_query_find_allocation_meta:
* @query: a GST_QUERY_ALLOCATION type query #GstQuery
* @api: the metadata API
- * @index: (out) (allow-none): the index
+ * @index: (out) (transfer none) (allow-none): the index
*
- * Check if @query has metadata @api set. When this function returns TRUE,
- * @index will contain the index where the requested API and the flags can be
- * found.
+ * Check if @query has metadata @api set. When this function returns %TRUE,
+ * @index will contain the index where the requested API and the parameters
+ * can be found.
*
- * Returns: TRUE when @api is in the list of metadata.
+ * Returns: %TRUE when @api is in the list of metadata.
*/
gboolean
gst_query_find_allocation_meta (GstQuery * query, GType api, guint * index)
* @allocator: (out) (transfer full) (allow-none): variable to hold the result
* @params: (out) (allow-none): parameters for the allocator
*
- * Parse an available query and get the alloctor and its params
+ * Parse an available query and get the allocator and its params
* at @index of the allocator array.
*/
void
* @allocator: (transfer none) (allow-none): new allocator to set
* @params: (transfer none) (allow-none): parameters for the allocator
*
- * Parse an available query and get the alloctor and its params
+ * Parse an available query and get the allocator and its params
* at @index of the allocator array.
*/
void
*
* Constructs a new query object for querying the scheduling properties.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
* @query: a GST_QUERY_SCHEDULING type query #GstQuery
* @mode: a #GstPadMode
*
- * Add @mode as aone of the supported scheduling modes to @query.
+ * Add @mode as one of the supported scheduling modes to @query.
*/
void
gst_query_add_scheduling_mode (GstQuery * query, GstPadMode mode)
*
* Check if @query has scheduling mode set.
*
- * <note>
- * <para>
- * When checking if upstream supports pull mode, it is usually not
- * enough to just check for GST_PAD_MODE_PULL with this function, you
- * also want to check whether the scheduling flags returned by
- * gst_query_parse_scheduling() have the seeking flag set (meaning
- * random access is supported, not only sequential pulls).
- * </para>
- * </note>
+ * > When checking if upstream supports pull mode, it is usually not
+ * > enough to just check for GST_PAD_MODE_PULL with this function, you
+ * > also want to check whether the scheduling flags returned by
+ * > gst_query_parse_scheduling() have the seeking flag set (meaning
+ * > random access is supported, not only sequential pulls).
*
- * Returns: TRUE when @mode is in the list of scheduling modes.
+ * Returns: %TRUE when @mode is in the list of scheduling modes.
*/
gboolean
gst_query_has_scheduling_mode (GstQuery * query, GstPadMode mode)
* Check if @query has scheduling mode set and @flags is set in
* query scheduling flags.
*
- * Returns: TRUE when @mode is in the list of scheduling modes
+ * Returns: %TRUE when @mode is in the list of scheduling modes
* and @flags are compatible with query flags.
*/
gboolean
*
* Constructs a new query object for querying if @caps are accepted.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
/**
* gst_query_parse_accept_caps:
* @query: The query to parse
- * @caps: (out): A pointer to the caps
+ * @caps: (out) (transfer none): A pointer to the caps
*
* Get the caps from @query. The caps remains valid as long as @query remains
* valid.
/**
* gst_query_parse_accept_caps_result:
* @query: a GST_QUERY_ACCEPT_CAPS type query #GstQuery
- * @result: location for the result
+ * @result: (out) (allow-none): location for the result
*
* Parse the result from @query and store in @result.
*/
* @filter should be returned from the CAPS query. Specifying a filter might
* greatly reduce the amount of processing an element needs to do.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
/**
* gst_query_parse_caps:
* @query: The query to parse
- * @filter: (out): A pointer to the caps filter
+ * @filter: (out) (transfer none): A pointer to the caps filter
*
* Get the filter from the caps @query. The caps remains valid as long as
* @query remains valid.
/**
* gst_query_parse_caps_result:
* @query: The query to parse
- * @caps: (out): A pointer to the caps
+ * @caps: (out) (transfer none): A pointer to the caps
*
* Get the caps result from @query. The caps remains valid as long as
* @query remains valid.
*
* Constructs a new query object for querying the drain state.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*/
/**
* gst_query_new_context:
+ * @context_type: Context type to query
*
* Constructs a new query object for querying the pipeline-local context.
*
- * Free-function: gst_query_unref
+ * Free-function: gst_query_unref()
*
* Returns: (transfer full): a new #GstQuery
*
* Since: 1.2
*/
GstQuery *
-gst_query_new_context (void)
+gst_query_new_context (const gchar * context_type)
{
GstQuery *query;
GstStructure *structure;
- structure = gst_structure_new_id_empty (GST_QUARK (QUERY_CONTEXT));
+ g_return_val_if_fail (context_type != NULL, NULL);
+
+ structure = gst_structure_new_id (GST_QUARK (QUERY_CONTEXT),
+ GST_QUARK (CONTEXT_TYPE), G_TYPE_STRING, context_type, NULL);
query = gst_query_new_custom (GST_QUERY_CONTEXT, structure);
return query;
gst_query_set_context (GstQuery * query, GstContext * context)
{
GstStructure *s;
+ const gchar *context_type;
g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_CONTEXT);
+ gst_query_parse_context_type (query, &context_type);
+ g_return_if_fail (strcmp (gst_context_get_context_type (context),
+ context_type) == 0);
+
s = GST_QUERY_STRUCTURE (query);
gst_structure_id_set (s,
/**
* gst_query_parse_context:
* @query: The query to parse
- * @context: (out): A pointer to store the #GstContext
+ * @context: (out) (transfer none): A pointer to store the #GstContext
*
* Get the context from the context @query. The context remains valid as long as
* @query remains valid.
*context = NULL;
}
-static void
-free_array_string (gpointer ptr)
-{
- gchar *str = *(gchar **) ptr;
- g_free (str);
-}
-
/**
- * gst_query_add_context_type:
+ * gst_query_parse_context_type:
* @query: a GST_QUERY_CONTEXT type query
- * @context_type: a context type
+ * @context_type: (out) (transfer none) (allow-none): the context type, or %NULL
+ *
+ * Parse a context type from an existing GST_QUERY_CONTEXT query.
*
- * Add a new context type to @query.
+ * Returns: a #gboolean indicating if the parsing succeeded.
*
* Since: 1.2
*/
-void
-gst_query_add_context_type (GstQuery * query, const gchar * context_type)
+gboolean
+gst_query_parse_context_type (GstQuery * query, const gchar ** context_type)
{
GstStructure *structure;
- GArray *array;
- gchar *copy;
+ const GValue *value;
- g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_CONTEXT);
- g_return_if_fail (gst_query_is_writable (query));
+ g_return_val_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_CONTEXT, FALSE);
structure = GST_QUERY_STRUCTURE (query);
- array = ensure_array (structure, GST_QUARK (CONTEXT_TYPES),
- sizeof (gchar *), free_array_string);
- copy = g_strdup (context_type);
- g_array_append_val (array, copy);
+ if (context_type) {
+ value = gst_structure_id_get_value (structure, GST_QUARK (CONTEXT_TYPE));
+ *context_type = g_value_get_string (value);
+ }
+
+ return TRUE;
}
/**
- * gst_query_get_n_context_types:
- * @query: a GST_QUERY_CONTEXT type query
+ * gst_query_new_bitrate:
*
- * Retrieve the number of values currently stored in the
- * context-types array of the query's structure.
+ * Constructs a new query object for querying the bitrate.
*
- * Returns: the context-types array size as a #guint.
+ * Free-function: gst_query_unref()
*
- * Since: 1.2
+ * Returns: (transfer full): a new #GstQuery
+ *
+ * Since: 1.16
*/
-guint
-gst_query_get_n_context_types (GstQuery * query)
+GstQuery *
+gst_query_new_bitrate (void)
{
+ GstQuery *query;
GstStructure *structure;
- GArray *array;
-
- g_return_val_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_CONTEXT, 0);
- structure = GST_QUERY_STRUCTURE (query);
- array = ensure_array (structure, GST_QUARK (CONTEXT_TYPES),
- sizeof (gchar *), free_array_string);
+ structure = gst_structure_new_id_empty (GST_QUARK (QUERY_BITRATE));
+ query = gst_query_new_custom (GST_QUERY_BITRATE, structure);
- return array->len;
+ return query;
}
/**
- * gst_query_parse_nth_context_type:
- * @query: a GST_QUERY_CONTEXT type query
- * @context_type: (out) (allow-none): the context type, or NULL
- *
- * Parse a context type from an existing GST_QUERY_CONTEXT query
- * from @index.
+ * gst_query_set_bitrate:
+ * @query: a GST_QUERY_BITRATE type #GstQuery
+ * @nominal_bitrate: the nominal bitrate in bits per second
*
- * Returns: a #gboolean indicating if the parsing succeeded.
+ * Set the results of a bitrate query. The nominal bitrate is the average
+ * bitrate expected over the length of the stream as advertised in file
+ * headers (or similar).
*
- * Since: 1.2
+ * Since: 1.16
*/
-gboolean
-gst_query_parse_nth_context_type (GstQuery * query, guint index,
- const gchar ** context_type)
+void
+gst_query_set_bitrate (GstQuery * query, guint nominal_bitrate)
{
- GstStructure *structure;
- GArray *array;
-
- g_return_val_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_CONTEXT, FALSE);
+ GstStructure *s;
- structure = GST_QUERY_STRUCTURE (query);
+ g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_BITRATE);
- array = ensure_array (structure, GST_QUARK (CONTEXT_TYPES),
- sizeof (gchar *), free_array_string);
- g_return_val_if_fail (index < array->len, FALSE);
-
- if (context_type)
- *context_type = g_array_index (array, gchar *, index);
+ s = GST_QUERY_STRUCTURE (query);
- return TRUE;
+ gst_structure_id_set (s,
+ GST_QUARK (NOMINAL_BITRATE), G_TYPE_UINT, nominal_bitrate, NULL);
}
/**
- * gst_query_has_context_type:
- * @query: a GST_QUERY_CONTEXT type query
- * @context_type: the context type
+ * gst_query_parse_bitrate:
+ * @query: a GST_QUERY_BITRATE type #GstQuery
+ * @nominal_bitrate: (out) (allow-none): The resulting bitrate in bits per second
*
- * Check if @query is asking for @context_type.
+ * Get the results of a bitrate query. See also gst_query_set_bitrate().
*
- * Returns: %TRUE if @context_type is requested.
- *
- * Since: 1.2
+ * Since: 1.16
*/
-gboolean
-gst_query_has_context_type (GstQuery * query, const gchar * context_type)
+void
+gst_query_parse_bitrate (GstQuery * query, guint * nominal_bitrate)
{
- guint i, n;
+ GstStructure *structure;
+ const GValue *value;
- g_return_val_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_CONTEXT, FALSE);
- g_return_val_if_fail (context_type != NULL, FALSE);
+ g_return_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_BITRATE);
- n = gst_query_get_n_context_types (query);
- for (i = 0; i < n; i++) {
- const gchar *tmp;
+ structure = GST_QUERY_STRUCTURE (query);
- if (gst_query_parse_nth_context_type (query, i, &tmp) &&
- strcmp (tmp, context_type) == 0)
- return TRUE;
+ if (nominal_bitrate) {
+ value = gst_structure_id_get_value (structure, GST_QUARK (NOMINAL_BITRATE));
+ *nominal_bitrate = g_value_get_uint (value);
}
-
-
- return FALSE;
}
projects / platform / upstream / gstreamer.git / blobdiff