Function: dvpp_vpc_convert_color_async

Applicable Products

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	x
Atlas inference products	√
Atlas 200I/500 A2 inference products	√

Description

Converts the image format. The width and height of the output image must be the same as those of the input image. This API is asynchronous.

Prototype

C Prototype

        
             aclError acldvppVpcConvertColorAsync(acldvppChannelDesc *channelDesc, acldvppPicDesc *inputDesc, acldvppPicDesc *outputDesc, aclrtStream stream)

Python Function

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

Parameters

Parameter	Description
dvpp_channel_desc	Int, pointer address of the channel description. The value must be the same as that of dvpp_channel_desc specified when the acl.media.dvpp_create_channel API is called to create a channel.
input_dvpp_pic_desc	Int, pointer address of the input image information. Call the acl.media.dvpp_create_pic_desc API to create the 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 the acl.media.dvpp_create_pic_desc API to create the 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). You must specify the width, height, width stride, height stride, buffer address, buffer size, and format of the output image. The width and height of the output image must be the same as those of the input image. Otherwise, an error is reported. If the width or height of the output image is set to 0, the VPC uses the width and height of the input image as those of the output image. In addition, the VPC calculates the width stride and height stride based on the alignment requirements. The alignment requirements vary according to the image format. For details, see Restrictions on Image Formats, Width and Height Alignment, and Buffers. The width stride and height stride of the output image must meet the alignment requirements. The alignment requirements vary according to the image format. For details, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.
stream	Int, stream object.

Return Value

Return Value	Description
ret	Int, error code. 0 on success; else, failure.

Restrictions

The input and output image resolution must be in the range of (10 x 6, 4096 x 4096].
For details about the input and output image formats, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.
For the Atlas inference product , if the input format is YUV400, the output format can only be YUV400.

Reference

For the API call example, see Sample Code for Format Conversion.

Parent topic: VPC