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 Is this pad connected. @pad: the pad to check Can this pad be used to pull a buffer. @pad: the pad to check 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 pulling a region buffer. You can specify which buffer to get using an offset/length pair or a start/stop timecode pair. @pad: the pad to get a buffer from @type: the type of region to get (time or offset based) @offset: the offset of the region to get @len: the length of the region to get @Returns: a #GstBuffer The function that will be called when the caps of the pad has changed. @pad: The pad that has its caps changed @caps: the new caps of the pad 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. The possible results from padnegotiation. @GST_PAD_NEGOTIATE_FAIL: The pads could not agree about the media type. @GST_PAD_NEGOTIATE_AGREE: The pads agreed about the media type. @GST_PAD_NEGOTIATE_TRY: The pad did not agree and suggests another media type. The function that will be called when negotiating. @pad: The pad that is being negotiated @caps: The current caps that are being negotiated @data: A generic gpointer that can be used to store user_data @Returns: The result of the negotiation process the region types for #gst_pad_pullregion. @GST_REGION_VOID: @GST_REGION_OFFSET_LEN: an offet/length pair @GST_REGION_TIME_LEN: a time start/length pair The function that will be called when pulling a region buffer. You can specify which buffer to get using an offset/length pair or a start/stop timecode pair. @pad: the pad to get a buffer from @type: the type of region to get (time or offset based) @offset: the offset of the region to get @len: the length of the region to get @Returns: a #GstBuffer @pad: @event: @Returns: 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: Destroy the pad. @pad: the pad to destroy @templ: @name: @Returns: @temp: @pad: @Returns: @pad: @chain: @pad: @get: @pad: @getregion: @pad: @nego: @pad: @newcaps: @pad: @bufpool: @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: @Returns: @pad: @ghostpad: @pad: @ghostpad: @pad: @Returns: @pad: @Returns: @srcpad: @sinkpad: @Returns: @srcpad: @sinkpad: @Returns: @srcpad: @sinkpad: @pad: @buf: @buffer: @pad: @Returns: @pad: @type: @offset: @len: @Returns: @size: @pad: @Returns: @self: @parent: @element: @elements: @srcpad: @destpad: @caps: @Returns: @counter: @count: @pad: @Returns: @pad: @Returns: @pad: @Returns: @pad: @bin: @parent: @Returns: @pad: @Returns: @padlist: @Returns: @pad: @Varargs: @Returns: @pad: @event: @Returns: @pad: @event: @pad: @event: @pad: @caps: @direction: @threadstate: @peer: @bufpen: @regiontype: @offset: @len: @sched: @chainfunc: @chainhandler: @getfunc: @gethandler: @eventfunc: @eventhandler: @getregionfunc: @pullregionfunc: @negotiatefunc: @newcapsfunc: @bufferpoolfunc: @ghostpads: Get the length of the region that is being pulled. @pad: the real pad to query. Get the offset of the region that is being pulled. @pad: the real pad to query. Get the scheduler of this real pad. @pad: the real pad to query. Get the type of the region that is being pulled. @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 get getfunction of the real pad. @pad: the real pad to query. Get the getregion function of the real pad. @pad: the real pad to query. Get the pullregion function of the real pad. @pad: the real pad to query. Get the negotiate function from the real pad. @pad: the real pad to query. Get the newcaps function from 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 real pad of this ghost pad. @pad: the real pad to query. @pad: @realpad: @name: @pad: @Returns: