vpc_convert_color_to_yuv420

Applicability

Product	Supported
Atlas 350 Accelerator Card	√
Atlas A3 training product/Atlas A3 inference product	√
Atlas A2 training product/Atlas A2 inference product	√
Atlas training product	x
Atlas inference product	√
Atlas 200I/500 A2 inference product	√

Description

Converts the image format to YUV420SP or YVU420SP. This API is asynchronous.

Prototype

C Prototype

hi_s32 hi_mpi_vpc_convert_color_to_yuv420 (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_to_yuv420(chn, source_pic, dest_pic, milli_sec)

Parameters

Parameter	Description
chn	Int, channel ID for image processing.
source_pic	Dict, source image information. For details, see hi_vpc_pic_info. For details about the restrictions, see Restrictions.
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, 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.
milli_sec	Int, timeout interval, in milliseconds.

Return Value

Return Value	Description
task_id	Int, task ID, used to identify a task.
ret	Int, error code. 0 indicates success. Other values indicate failure. For details, see VPC Return Codes.

Restrictions

This API is compatible with the format conversion API provided by earlier versions of the AI processor. Compatible input and output image formats are listed below. The same binary format is output in the compatible scenario.
- Input formats: YUV420SP, YVU420SP, YUV422SP, YVU422SP, YUV444 Packed, YUV444SP, and YVU444SP
- Output formats: YUV420SP and YVU420SP
- For the preceding formats, the binary output of this API is different from that of vpc_convert_color.

Requirements on the input resolution:

Version	Restrictions
Atlas inference product	Input image resolution: [10 x 6, 4096 x 4096].
Atlas 350 Accelerator Card Atlas 200I/500 A2 inference product Atlas A2 training product/Atlas A2 inference product Atlas A3 training product/Atlas A3 inference product	Input image resolution: [10 x 6, 4096 x 8192].

Version

Restrictions

Atlas inference product

Input image resolution: [10 x 6, 4096 x 4096].

Atlas 350 Accelerator Card

Atlas 200I/500 A2 inference product

Atlas A2 training product/Atlas A2 inference product

Atlas A3 training product/Atlas A3 inference product

Input image resolution: [10 x 6, 4096 x 8192].

The following enum values of hi_pixel_format are supported for the source image format:

HI_PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1,       // YUV420SP NV12 8bit   
HI_PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2,       // YUV420SP NV21 8bit 
HI_PIXEL_FORMAT_YUV_SEMIPLANAR_422 = 3,       // YUV422SP 8bit
HI_PIXEL_FORMAT_YVU_SEMIPLANAR_422 = 4,       // YVU422SP 8bit
HI_PIXEL_FORMAT_YUV_SEMIPLANAR_444 = 5,       // YUV444SP 8bit
HI_PIXEL_FORMAT_YVU_SEMIPLANAR_444 = 6,       // YVU444SP 8bit
HI_PIXEL_FORMAT_YUYV_PACKED_422 = 7,          // YUV422Packed YUYV 8bit
HI_PIXEL_FORMAT_UYVY_PACKED_422 = 8,          // YUV422Packed UYVY 8bit
HI_PIXEL_FORMAT_YVYU_PACKED_422 = 9,          // YUV422Packed YVYU 8bit
HI_PIXEL_FORMAT_VYUY_PACKED_422 = 10,         // YUV422Packed VYUY 8bit
HI_PIXEL_FORMAT_YUV_PACKED_444 = 11,          // YUV444Packed 8bit
HI_PIXEL_FORMAT_RGB_888 = 12,                 // RGB888
HI_PIXEL_FORMAT_BGR_888 = 13,                 // BGR888
HI_PIXEL_FORMAT_ARGB_8888 = 14,               // ARGB8888
HI_PIXEL_FORMAT_ABGR_8888 = 15,               // ABGR8888
HI_PIXEL_FORMAT_RGBA_8888 = 16,               // RGBA8888
HI_PIXEL_FORMAT_BGRA_8888 = 17,               // BGRA8888
HI_PIXEL_FORMAT_YUV_SEMIPLANAR_440 = 1000,    // YUV440SP 8bit 
HI_PIXEL_FORMAT_YVU_SEMIPLANAR_440 = 1001,    // YVU440SP 8bit

If the output image formats can be the following enumerated values of hi_pixel_format. Other image formats are not supported and would cause a failure return.
```
HI_PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1,       // YUV420SP NV12 8bit   
HI_PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2,       // YUV420SP NV21 8bit 
```
For details about the restrictions on the width and height alignment and buffer size of each image format, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.

Parent topic: VPC APIs