VPC Parameter Verification Failure

Symptom

The VPC API call returns 0xA0078003 (HI_ERR_VPC_ILLEGAL_PARAM), indicating that the parameter value is out of the valid range. Information similar to the following is displayed in the log, which may vary in different versions:

• Log message (1): The VPC resizing width is greater than the output width.

  resize width (224) is greater than output width (120)

  Or

  width should be in [10, 32768], width is 654321

• Log message (2): The VPC cropping width is greater than the input width.

  crop width 120 cannot be greater than input width 100

• Log message (3): The input resizing algorithm is incorrect.

  resize interpolation [8] is not supported

  Or

  flip mode[5] not supported, support mode [0, 1, 2]

• Log message (4): The image buffer size is insufficient.

  buffer size(50176) is smaller than need buffer size(95264) when format is 1

  Or

  buffer size(50176) is smaller than need buffer size(95264) when format is 1

• Log message (5): Failed to verify the image address.

  on device 0, num 0 input addr (start 0x100020003000 end 0x100020004000) is illegal

  Or

  buffer address is null

• Log message (6): The VPC cropping output width or height is greater than the input width or height.

  crop width[300] or height[300] is greater than input width[224] or height[224]

Possible Cause

The possible causes are as follows:

• Log message (1): The VPC resizing width is greater than the output width.
• Log message (2): The VPC cropping width is greater than the input width.

• Log message (3): The input resizing algorithm is incorrect.
• Log message (4): The image buffer size is insufficient.
• Log message (5): Failed to verify the image address.
• Log message (6): The VPC cropping output width or height is greater than the input width or height.

Fault Locating

1. Locate the VPC configuration parameter based on the error information in the log and modify the parameter as prompted.
2. Rectify the fault based on the error information in the logs and the VPC functions and restrictions in "AscendCL API Reference > Media Data Processing V1" or "AscendCL API Reference > Media Data Processing V2" in CANN AscendCL Application Software Development Guide (C&C++).

Solution

Modify the configuration file based on the error information.

1. For log message (1), change the resizing width to a value less than or equal to the output width.
2. For log messages (2) and (6), change the cropping width to a value less than the input width.
3. For log message (3), change the resizing algorithm to one that is supported by the current version.
4. For log message (4), allocate a sufficient buffer according to the format and correctly configure buffer_size.
5. For log message (5), allocate an image address using hi_mpi_dvpp_malloc or acldvppMalloc.