GstBase.PushSrc

Subclasses:

None

Methods

Inherited:

GstBase.BaseSrc (23), Gst.Element (82), Gst.Object (27), GObject.Object (37)

Structs:

Gst.ElementClass (10), GObject.ObjectClass (5)

Virtual Methods

Inherited:

GstBase.BaseSrc (19), Gst.Element (16), Gst.Object (1), GObject.Object (7)

	do_alloc ()
	do_create (buf)
	do_fill (buf)

Properties

Inherited:

GstBase.BaseSrc (5), Gst.Object (2)

Signals

Inherited:

Gst.Element (3), Gst.Object (1), GObject.Object (1)

Fields

Inherited:

Gst.Element (3), Gst.Object (1), GObject.Object (1)

Name	Type	Access	Description
parent	GstBase.BaseSrc	r

Class Details

class GstBase.PushSrc(**kwargs)

Bases:

GstBase.BaseSrc

Abstract:

No

Structure:

GstBase.PushSrcClass

This class is mostly useful for elements that cannot do random access, or at least very slowly. The source usually prefers to push out a fixed size buffer.

Subclasses usually operate in a format that is different from the default Gst.Format.BYTES format of GstBase.BaseSrc.

Classes extending this base class will usually be scheduled in a push based mode. If the peer accepts to operate without offsets and within the limits of the allowed block size, this class can operate in getrange based mode automatically. To make this possible, the subclass should implement and override the SCHEDULING query.

The subclass should extend the methods from the baseclass in addition to the ::create method.

Seeking, flushing, scheduling and sync is all handled by this base class.

do_alloc() virtual

Return type:

(Gst.FlowReturn, buf: Gst.Buffer or None)

Allocate memory for a buffer.

do_create(buf) virtual

Parameters:

buf (Gst.Buffer or None) –

Return type:

(Gst.FlowReturn, buf: Gst.Buffer or None)

Ask the subclass to create a buffer, the default implementation will call alloc if no allocated buf is provided and then call fill.

do_fill(buf) virtual

Parameters:

buf (Gst.Buffer) –

Return type:

Gst.FlowReturn

Ask the subclass to fill the buffer with data.