Function: dvpp_vpc_resize_async

Applicability

Product	Supported (√/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	√

Function Usage

Resizes an image. This API is asynchronous.

Prototype

C Prototype

aclError acldvppVpcResizeAsync(acldvppChannelDesc *channelDesc, acldvppPicDesc *inputDesc, acldvppPicDesc *outputDesc, acldvppResizeConfig *resizeConfig, aclrtStream stream)

Python Function

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

Parameter Description

Parameter	Description
dvpp_channel_desc	Int, pointer address of the channel description. It must be the same as the dvpp_channel_desc argument passed to the acl.media.dvpp_create_channel call.
input_dvpp_pic_desc	Int, pointer address of the input image information. Call acl.media.dvpp_create_pic_desc to create an image description. Call the acl.media.dvpp_set_pic_desc APIs to set image description parameters (such as the image format, width, and height).
output_dvpp_pic_desc	Int, pointer address of the output image information. When output_dvpp_pic_desc is used as an input, the user needs to: Call acl.media.dvpp_create_pic_desc to create an image description. Call the acl.dvpp.set_pic_desc APIs to set the image description (including the memory address, memory size, image format, and image resolution).
dvpp_resize_config	Int, pointer address of the image resizing configuration data. Call acl.media.dvpp_create_resize_config to create an image resizing configuration.
stream	Int, stream object.

Return Value Description

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

Restrictions

Version	Restrictions
Atlas training products	Input image size and format: When the input image resolution is in the range of [10 x 6, 4096 x 4096], the input image formats described in Restrictions on Image Formats, Width and Height Alignment, and Buffers are supported. When the width or height of the input image is in the range of (4096, 8192], the supported formats are as follows: The following enum values of acldvppPixelFormat are supported: PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1, // YUV420SP NV12 8bit PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2, // YUV420SP NV21 8bit If the width/height of the input image is not 2-pixel aligned, the VPC automatically rounds down the width/height to the nearest multiple of 2 pixels. For example, for a 15 x 15 input image, the VPC rounds down the image size to 14 x 14 before resizing the image. For details about the output image size and format, see Restrictions on Image Formats, Width and Height Alignment, and Buffers. For details about the restrictions on the width and height alignment, buffer size, and image format, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.
Atlas inference products	Input image size and format: When the input image resolution is in the range of [10 x 6, 4096 x 4096], the input image formats described in Restrictions on Image Formats, Width and Height Alignment, and Buffers are supported. When the width or height of the input image is in the range of (4096, 8192], the supported formats are as follows: The following enum values of acldvppPixelFormat are supported: PIXEL_FORMAT_YUV_400 = 0, // YUV400 8bit PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1, // YUV420SP NV12 8bit PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2, // YUV420SP NV21 8bit PIXEL_FORMAT_YUV_SEMIPLANAR_422 = 3, // YUV422SP 8bit PIXEL_FORMAT_YVU_SEMIPLANAR_422 = 4, // YVU422SP 8bit PIXEL_FORMAT_YUV_SEMIPLANAR_444 = 5, // YUV444SP 8bit PIXEL_FORMAT_YVU_SEMIPLANAR_444 = 6, // YVU444SP 8bit PIXEL_FORMAT_YUYV_PACKED_422 = 7, // YUV422Packed YUYV 8bit PIXEL_FORMAT_UYVY_PACKED_422 = 8, // YUV422Packed UYVY 8bit PIXEL_FORMAT_YVYU_PACKED_422 = 9, // YUV422Packed YVYU 8bit PIXEL_FORMAT_VYUY_PACKED_422 = 10, // YUV422Packed VYUY 8bit If the width/height of the input image is not 2-pixel aligned, the VPC automatically rounds down the width/height to the nearest multiple of 2 pixels. For example, for a 15 x 15 input image, the VPC rounds down the image size to 14 x 14 before resizing the image. For details about the output image size and format, see Restrictions on Image Formats, Width and Height Alignment, and Buffers. For details about the restrictions on the width and height alignment, buffer size, and image format, see Restrictions on Image Formats, Width and Height Alignment, and Buffers. When the input and output images are in ARGB8888, ABGR8888, RGBA8888, or BGRA8888 format, the A component value changes to 0 after being resized by this API.
Atlas A2 training products/Atlas A2 inference products Atlas 200I/500 A2 inference products Atlas A3 training products/Atlas A3 inference products	Input and output image sizes: Input image resolution: 10 x 6 to 8192 x 8192 Output image resolution: 10 x 6 to 4096 x 8192 For details about the restrictions on the image format, width and height alignment, and buffer size, see Restrictions on Image Formats, Width and Height Alignment, and Buffers. When the input and output images are in ARGB8888, ABGR8888, RGBA8888, or BGRA8888 format, the A component value changes to 0 after being resized by this API.

Version

Restrictions

Atlas training products

Input image size and format:
- When the input image resolution is in the range of [10 x 6, 4096 x 4096], the input image formats described in Restrictions on Image Formats, Width and Height Alignment, and Buffers are supported.
- When the width or height of the input image is in the range of (4096, 8192], the supported formats are as follows:
  The following enum values of acldvppPixelFormat are supported:
```
PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1,       // YUV420SP NV12 8bit   
PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2,       // YUV420SP NV21 8bit 
```
- If the width/height of the input image is not 2-pixel aligned, the VPC automatically rounds down the width/height to the nearest multiple of 2 pixels. For example, for a 15 x 15 input image, the VPC rounds down the image size to 14 x 14 before resizing the image.
For details about the output image size and format, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.
For details about the restrictions on the width and height alignment, buffer size, and image format, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.

Atlas inference products

Input image size and format:

When the input image resolution is in the range of [10 x 6, 4096 x 4096], the input image formats described in Restrictions on Image Formats, Width and Height Alignment, and Buffers are supported.

When the width or height of the input image is in the range of (4096, 8192], the supported formats are as follows:

The following enum values of acldvppPixelFormat are supported:

PIXEL_FORMAT_YUV_400 = 0,               // YUV400 8bit
PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1,    // YUV420SP NV12 8bit   
PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2,    // YUV420SP NV21 8bit 
PIXEL_FORMAT_YUV_SEMIPLANAR_422 = 3,    // YUV422SP 8bit
PIXEL_FORMAT_YVU_SEMIPLANAR_422 = 4,    // YVU422SP 8bit
PIXEL_FORMAT_YUV_SEMIPLANAR_444 = 5,    // YUV444SP 8bit
PIXEL_FORMAT_YVU_SEMIPLANAR_444 = 6,    // YVU444SP 8bit
PIXEL_FORMAT_YUYV_PACKED_422 = 7,       // YUV422Packed YUYV 8bit
PIXEL_FORMAT_UYVY_PACKED_422 = 8,       // YUV422Packed UYVY 8bit
PIXEL_FORMAT_YVYU_PACKED_422 = 9,       // YUV422Packed YVYU 8bit
PIXEL_FORMAT_VYUY_PACKED_422 = 10,      // YUV422Packed VYUY 8bit

If the width/height of the input image is not 2-pixel aligned, the VPC automatically rounds down the width/height to the nearest multiple of 2 pixels. For example, for a 15 x 15 input image, the VPC rounds down the image size to 14 x 14 before resizing the image.

For details about the output image size and format, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.
For details about the restrictions on the width and height alignment, buffer size, and image format, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.
When the input and output images are in ARGB8888, ABGR8888, RGBA8888, or BGRA8888 format, the A component value changes to 0 after being resized by this API.

Atlas A2 training products/Atlas A2 inference products

Atlas 200I/500 A2 inference products

Atlas A3 training products/Atlas A3 inference products

Input and output image sizes:
- Input image resolution: 10 x 6 to 8192 x 8192
- Output image resolution: 10 x 6 to 4096 x 8192
For details about the restrictions on the image format, width and height alignment, and buffer size, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.
When the input and output images are in ARGB8888, ABGR8888, RGBA8888, or BGRA8888 format, the A component value changes to 0 after being resized by this API.

Parent topic: VPC