acldvppJpegDecodeAsync

Description

Decodes a .jpg, .jpeg, .JPG, or .JPEG image. This API is asynchronous.

Restrictions

This API is asynchronous. The API call delivers a task rather than executes a task. After this API is called, call the synchronization API (for example, aclrtSynchronizeStream) to ensure that the task is complete.

Prototype

aclError acldvppJpegDecodeAsync(acldvppChannelDesc *channelDesc,

const void *data,

uint32_t size,

acldvppPicDesc *outputDesc,

aclrtStream stream)

Parameters

Parameter	Input/Output	Description
channelDesc	Input	Pointer to the channel description. Must be the same as the channelDesc argument passed to the acldvppCreateChannel call.
data	Input	Pointer to the input buffer address.
size	Input	Actual size of the input image, in bytes.
outputDesc	Input/Output	Pointer to the output image description. When outputDesc is used as an input, the user needs to: Call acldvppCreatePicDesc to create an image description. Call acldvppSetPicDesc series to set the buffer address, buffer size, image format, widthStride, and heightStride of the output image. Call acldvppJpegPredictDecSize to predict the output buffer size in advance. Call acldvppJpegGetImageInfo or acldvppJpegGetImageInfoV2 to obtain the width and height of the input JPEG image. For details about the output format and width and height alignment requirements, see Functions and Restrictions. When outputDesc is used as an output, you can obtain the decoding output from the buffer address and call the acldvppGetPicDesc series to obtain the width and height of the output image.
stream	Input	Stream.

Returns