Function: dvpp_jpeg_predict_enc_size

Applicability

Product	Supported (√/x)
Atlas A3 training products / Atlas A3 inference products	√
Atlas A2 training products / Atlas A2 inference products	√
Atlas training products	√
Atlas inference products	√
Atlas 200I/500 A2 inference products	√

Function Usage

Predicts the size of the output buffer allocation required for image encoding based on the input image description and image encoding configuration.

Prototype

C Prototype

        
             aclError acldvppJpegPredictEncSize(const acldvppPicDesc *inputDesc, const acldvppJpegeConfig *config, uint32_t *size)

Python Function

        
             size, ret = acl.media.dvpp_jpeg_predict_enc_size(input_dvpp_pic_desc, config)

Parameter Description

Parameter	Description
input_dvpp_pic_desc	Int, pointer address of the description of input images. Call acl.media.dvpp_create_pic_desc to create an image description. Call the acl.media.dvpp_set_pic_desc APIs to set image description parameters (such as the image format, width, and height).
config	Int, pointer address of the image encoding configuration. Call acl.media.dvpp_create_jpege_config to create image encoding configuration data.

Parameter

Description

input_dvpp_pic_desc

Int, pointer address of the description of input images.

Call acl.media.dvpp_create_pic_desc to create an image description.
Call the acl.media.dvpp_set_pic_desc APIs to set image description parameters (such as the image format, width, and height).

config

Int, pointer address of the image encoding configuration.

Call acl.media.dvpp_create_jpege_config to create image encoding configuration data.

Return Value Description

Return Value	Description
size	Int, predicted allocation in bytes for the output image. The predicted size is greater than what is actually needed, which can be obtained from the size parameter returned by the acl.media.dvpp_jpeg_encode_async call.
ret	Int, error code: 0 on success; else, failure.

Return Value

Description

size

Int, predicted allocation in bytes for the output image.

The predicted size is greater than what is actually needed, which can be obtained from the size parameter returned by the acl.media.dvpp_jpeg_encode_async call.

ret

Int, error code: 0 on success; else, failure.

Reference

For details about the API call sequence and example, see JPEGD.

Parent topic: JPEGE