GstAllocators.DmaBufAllocator

Subclasses:

None

Methods

Inherited:

GstAllocators.FdAllocator (2), Gst.Allocator (5), Gst.Object (27), GObject.Object (37)

Structs:

GObject.ObjectClass (5)

class	alloc (allocator, fd, size)
class	alloc_with_flags (allocator, fd, size, flags)
class	new ()

Virtual Methods

Inherited:

Gst.Allocator (2), Gst.Object (1), GObject.Object (7)

Properties

Inherited:

Gst.Object (2)

Signals

Inherited:

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

Fields

Inherited:

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

Name	Type	Access	Description
parent	GstAllocators.FdAllocator	r

Class Details

class GstAllocators.DmaBufAllocator(**kwargs)

Bases:

GstAllocators.FdAllocator

Abstract:

No

Structure:

GstAllocators.DmaBufAllocatorClass

Base class for allocators with dmabuf-backed memory

New in version 1.12.

classmethod alloc(allocator, fd, size)

Parameters:

• allocator (Gst.Allocator) – allocator to be used for this memory

• fd (int) – dmabuf file descriptor

• size (int) – memory size

Returns:

a Gst.Memory based on allocator. When the buffer will be released dmabuf allocator will close the fd. The memory is only mmapped on Gst.Buffer.map() request.

Return type:

Gst.Memory or None

Return a Gst.Memory that wraps a dmabuf file descriptor.

New in version 1.2.

classmethod alloc_with_flags(allocator, fd, size, flags)

Parameters:

• allocator (Gst.Allocator) – allocator to be used for this memory

• fd (int) – dmabuf file descriptor

• size (int) – memory size

• flags (GstAllocators.FdMemoryFlags) – extra GstAllocators.FdMemoryFlags

Returns:

a Gst.Memory based on allocator.

When the buffer will be released the allocator will close the fd unless the GstAllocators.FdMemoryFlags.DONT_CLOSE flag is specified. The memory is only mmapped on gst_buffer_mmap() request.

Return type:

Gst.Memory or None

Return a Gst.Memory that wraps a dmabuf file descriptor.

New in version 1.16.

classmethod new()

Returns:

a new dmabuf allocator. Use Gst.Object.unref() to release the allocator after usage

Return type:

Gst.Allocator

Return a new dmabuf allocator.

New in version 1.2.