Function: dvpp_jpeg_get_image_info

Applicability

Product	Supported
Ascend 950PR/Ascend 950DT	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	√

Description

Reads the width, height, and color channel count from the buffer that stores the JPEG image data.

This API checks whether the image format supports decoding. For an unsupported stream, the API returns the error code ACL_ERROR_UNSUPPORTED_JPEG. See aclError for more details.

Prototype

C Prototype

aclError acldvppJpegGetImageInfo(const void *data, uint32_t size, uint32_t *width, uint32_t *height, int32_t *components)

Python Function

width, height, components, ret = acl.media.dvpp_jpeg_get_image_info(data, size)

Parameters

Parameter	Description
data	Int, address of the memory that stores the JPEG image.
size	Int, memory size, in bytes.

Return Value

Return Value	Description
width	Int, pointer address of the image width.
height	Int, pointer address of the image height.
components	Int, pointer address of the number of color channels.
ret	Int, error code. 0 on success; else, failure.

Parent topic: JPEGD