GstVa.VaPool¶

Methods¶

class	`get_buffer_size` (pool)
class	`new` ()
class	`new_with_config` (caps, min_buffers, max_buffers, usage_hint, use_derived, allocator, alloc_params)
class	`requires_video_meta` (pool)

class GstVa.VaPool(**kwargs)¶

GstVaPool is a buffer pool for VA allocators.

New in version 1.22.

classmethod get_buffer_size(pool)¶

Parameters:

pool (Gst.BufferPool) – a Gst.BufferPool

Returns:

whether the surface size was retrieved.

Return type:

(bool, size: int)

Helper function to retrieve the VA surface size provided by pool.

New in version 1.24.

classmethod new()¶

New in version 1.22.

classmethod new_with_config(caps, min_buffers, max_buffers, usage_hint, use_derived, allocator, alloc_params)¶

Parameters:

caps (Gst.Caps) – the Gst.Caps of the buffers handled by the new pool.
min_buffers (int) – minimum number of frames to create.
max_buffers (int) – maximum number of frames to create.
usage_hint (int) – VA usage hint
use_derived (GstVa.VaFeature) – a GstVa.VaFeature for derived mapping (only used when VA allocator).
allocator (Gst.Allocator) – the VA allocator to use.
alloc_params (Gst.AllocationParams) – Gst.AllocationParams to use.

Returns:

a new Gst.BufferPool that handles VASurfacesID-backed buffers. If the pool cannot be configured correctly, None is returned.

Return type:

Gst.BufferPool

New in version 1.22.

classmethod requires_video_meta(pool)¶

Retuns: True if pool always add GstVideo.VideoMeta to its buffers. Otherwise, False.

New in version 1.22.