GstPad The connection between Elements #GstElement are connected to each other via "pads", which are extremely light-weight generic connections. After two pad are retrieved from an element with gst_element_get_pad(), the pads can be connected with gst_pad_connect(). Pads are typically created from a #GstPadTemplate with gst_pad_new_from_template(). Pad have #GstCaps attached to it to describe the media type they are capable of dealing with. gst_pad_get_caps() and gst_pad_set_caps() are used to manipulate the caps of the pads. Pads created from a padtemplate cannot set capabilities that are incompatible with the padtemplates capabilities. Pads without padtemplates can be created with gst_pad_new() which takes a direction and a name as an argument. gst_pad_get_parent() will retrieve the #GstElement that owns the pad. GstElements creating a pad will typicilally use the various gst_pad_set_*_function() calls to register callbacks for various events on the pads. GstElements will use gst_pad_push() and gst_pad_pull() to push out or pull a buffer in. The gst_pad_pullregion() function can be used to request for a buffer with a specific offset (in time or in bytes). gst_pad_select() and gst_pad_selectv() are use by plugins to wait on a set of pads for a new #GstBuffer or #GstEvent. To send an event on a pad, use gst_pad_send_event(). #GstPadTemplate, #GstElement, #GstEvent Get the name of the pad. @pad: the pad to query Get the private data set by the element that owns the pad. @pad: the pad to query Get the parent element of this pad. @pad: the pad to query Get the padtemplate that was used to create this pad. NULL if no padtemplate was used. @pad: the pad to query Return the real pad of this pad. @pad: the pad to query Get the pad direction. @pad: the pad to query Get the capabilities of a pad. @pad: the pad to query Get the peerpad of this pad. @pad: the pad to query Can this pad be used to pull a buffer. @pad: the pad to check Check if the pad is a sinkpad. @pad: the pad to query Check if the pad is a srcpad. @pad: the pad to query Checks if the pad is connected @pad: the pad to query The function that will be called when chaining buffers. @pad: the pad that performed the chain @buf: the buffer that is chained The function that will be called when pulling a buffer. @pad: the pad to get a buffer from @Returns: a #GstBuffer The function that will be called when a bufferpool is requested from this pad. @pad: the pad with the bufferpool @Returns: the GstBufferPool associated with this pad. Return the caps of the specified pad. By default this function will return the pad template caps but can optionally be overridden. @pad: The pad to get the caps of @caps: The peer caps, can be used to filter the caps. @Returns: The caps of the pad. Function signature to handle an event for the pad. @pad: The pad to handle the event @event: The event to handle @Returns: TRUE if the pad could handle the event. Function signature to handle a new connection on the pad. @pad: The pad that is connected. @caps: The peer caps. @Returns: the result of the connection with the specified caps. The result of a pad connection. @GST_PAD_CONNECT_REFUSED: The connectino was refused @GST_PAD_CONNECT_DELAYED: The connection was delayed, probably because the element needs more specific pad caps. @GST_PAD_CONNECT_OK: The connection succeeded. @GST_PAD_CONNECT_DONE: The connection succeeded, any more attempts are not needed. The signature of a convert function. @pad: The pad to perform the convert on @src_format: The source format of the conversion @src_value: The source value of the conversion @dest_format: a pointer to the destination format @dest_value: a pointer to the destination value @Returns: TRUE if the conversion could be performed. The dispatcher function is called for all internally connected pads, see gst_pad_dispatcher(). @pad: The pad that is dispatched @data: User data @Returns: TRUE if the dispatching procedure has to be stopped. The signature of the internal pad connection function @pad: The pad to query @Returns: a Glist of pads that connect to the requested pad internally to the parent element. g_list_free() after use. The different supported query types @GST_PAD_QUERY_TOTAL: Query the total stream time @GST_PAD_QUERY_POSITION: Query the current stream position @GST_PAD_QUERY_LATENCY: Query the latency on the pad @GST_PAD_QUERY_JITTER: Query the average jitter beteen optimal processing and current processing. @GST_PAD_QUERY_SEGMENT_END: Query the end position of the currently executing segment The signature of query function @pad: The pad to query @type: The query type @format: a pointer to the target format @value: a pointer to the target value @Returns: TRUE if the query could be performed The direction this pad is. @GST_PAD_UNKNOWN: direction is unknown @GST_PAD_SRC: this is a source pad @GST_PAD_SINK: this is a sink pad Flags for the pad. @GST_PAD_DISABLED: the pad is disabled @GST_PAD_EOS: the pad is in end of stream state @GST_PAD_FLAG_LAST: subclasses can use this number to enumerate their flags @name: @direction: @Returns: @type: @name: @direction: @Returns: @type: @templ: @name: @Returns: Destroy the pad. @pad: the pad to destroy @templ: @name: @Returns: @temp: @pad: @Returns: @pad: @chain: @pad: @get: @pad: @bufpool: @pad: @connect: @pad: @getcaps: @pad: @caps: @Returns: @pad: @Returns: @srcpad: @sinkpad: @Returns: @pad: @name: @pad: @Returns: @pad: @priv: @pad: @Returns: @pad: @parent: @pad: @Returns: @pad: @Returns: @pad: @sched: @pad: @pad: @Returns: @pad: @ghostpad: @pad: @ghostpad: @pad: @Returns: @pad: @Returns: @srcpad: @sinkpad: @Returns: @srcpad: @sinkpad: @filtercaps: @Returns: @srcpad: @sinkpad: @filtercaps: @Returns: @pad: @srcpad: @sinkpad: @filtercaps: @Returns: @pad: @srcpad: @sinkpad: @srcpad: @sinkpad: @Returns: @srcpad: @sinkpad: @filtercaps: @Returns: @pad: @buf: @buffer: @pad: @Returns: @pad: @Returns: @self: @parent: @element: @elements: @pad: @caps: @Returns: @pad: @Returns: @pad: @Returns: @pad: @Returns: @pad: @Returns: @srcpad: @sinkpad: @Returns: @pad: @bin: @parent: @Returns: @pad: @Returns: @padlist: @Returns: @pad: @Varargs: @Returns: @pad: @dispatch: @data: @Returns: @pad: @event: @Returns: @pad: @event: @Returns: @pad: @event: @pad: @convert: @pad: @src_format: @src_value: @dest_format: @dest_value: @Returns: @pad: @src_format: @src_value: @dest_format: @dest_value: @Returns: @pad: @Returns: @pad: @Returns: @pad: @intconn: @pad: @query: @pad: @type: @format: @value: @Returns: @pad: @type: @format: @value: @Returns: @pad: @caps: @filter: @appfilter: @direction: @sched: @sched_private: @peer: @bufpen: @chainfunc: @chainhandler: @getfunc: @gethandler: @eventfunc: @eventhandler: @convertfunc: @queryfunc: @intconnfunc: @getcapsfunc: @connectfunc: @bufferpoolfunc: @ghostpads: Get the scheduler of this real pad. @pad: the real pad to query. Get the direction of the real pad. @pad: the realpad to query. Get the caps of the real pad. @pad: the real pad to query. Get the peer element of the real pad. @pad: the real pad to query. Get the bufpen of the real pad. @pad: the real pad to query. Get the chain function of the real pad. @pad: the real pad to query. Get the filter from the pad @pad: the pad to query Get the application filter for this pad @pad: the pad to query Get get getfunction of the real pad. @pad: the real pad to query. Get the bufferpoolfunction from the real pad. @pad: the real pad to query. Get the eventhandler function from the real pad. @pad: the real pad to query. Get the event function of this real pad. @pad: the real pad to query. Get the eventhandler function of this real pad. @pad: the real pad to query. Get the gethandler function of this real pad. @pad: the real pad to query. Get the connect function of the pad @pad: the pad to query Get the getcaps function of this pad @pad: the pad to query Get the convert function of this pad @pad: the pad to query Get the internal connection function of this pad @pad: the pad to query Get the query function of this pad @pad: the pad to query Get the real pad of this ghost pad. @pad: the real pad to query. @name: @pad: @Returns: