Documentation

Function: dvpp_vpc_pyr_down_async

C Prototype

aclError acldvppVpcPyrDownAsync(acldvppChannelDesc *channelDesc, acldvppPicDesc *inputDesc, acldvppPicDesc *outputDesc, void *reserve, aclrtStream stream)

Python Function

ret = acl.media.dvpp_vpc_pyr_down_async(dvpp_channel_desc, input_dvpp_pic_desc, output_dvpp_pic_desc, reserve, stream)

Function Usage

Performs pyramid resizing to resize the input image to half the original size. This API is asynchronous.

The Atlas 200/300/500 Inference Product does not support this API.

The Atlas Training Series Product does not support this API.

Input Description

dvpp_channel_desc: int, pointer address of the channel description. It must be the same as the dvpp_channel_desc argument passed to the acl.media.dvpp_create_channel call.

input_dvpp_pic_desc: int, pointer address of the input image information.
  • Call acl.media.dvpp_create_pic_desc to create an image description.
  • Call the acl.media.dvpp_set_pic_desc APIs to set the image description (including the buffer address, buffer size, image format, and image resolution).

output_dvpp_pic_desc: int, pointer address of the output image information.

When this argument is used as an input, the user needs to:

  • Call acl.media.dvpp_create_pic_desc to create an image description.
  • Call the acl.media.dvpp_set_pic_desc APIs to set the image description (including the buffer address, buffer size, image format, and image resolution).

reserve: int, pointer address of the pyramid configuration parameter. This parameter is reserved.

stream: int, stream.

Return Value

ret: int, error code.

  • 0 indicates the success of task delivery.
  • Other values indicate the failure of task delivery.

Restrictions
Parent topic: VPC