Documentation

acl.himpi.vpc_convert_color

C Prototype

hi_s32 hi_mpi_vpc_convert_color (hi_vpc_chn chn, const hi_vpc_pic_info *source_pic, hi_vpc_pic_info *dest_pic, hi_u32 *task_id, hi_s32 milli_sec);

Python Function

task_id, ret = acl.himpi.vpc_convert_color(chn, source_pic, dest_pic, milli_sec)

Function Usage

Converts the image format. This API is asynchronous.

The Atlas 200/300/500 Inference Product does not support this API in the current version.

The Atlas Training Series Product does not support this API in the current version.

Input Description

chn: int, image processing channel ID.

source_pic: dict, original image information. For details, see hi_vpc_pic_info. For details about related restrictions, see #EN-US_TOPIC_0000002163436249/section1676152117452.

dest_pic: dict, destination image information. For details, see hi_vpc_pic_info.

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, VPC uses the width and height of the input image as the width and height of the output image respectively. In addition, VPC calculates the width stride and height stride based on the alignment requirements, which vary with 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, which vary with the image format. For details, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.
milli_sec: int, timeout interval (ms).
  • -1: blocking mode.
  • 0: non-blocking mode.
  • > 0: timeout interval (timeout mode). The timeout interval varies with the operating system. The deviation is generally within a time slice of an operating system. For example, if the time slice of an operating system is 4 ms and the value of milli_sec is set to 1, the actual timeout interval ranges from 1 ms to 5 ms. When the CPU load is high, the timeout interval may fluctuate.

Return Value
ret: int, error code.

task_id: task ID, used to identify a task.
Parent topic: VPC APIs