hi_vdec_get_pic_buf_size

Applicable Products

Product	Supported
Ascend 950PR / Ascend 950DT	√
Atlas A3 training products / Atlas A3 inference products	√
Atlas A2 training products / Atlas A2 inference products	√
Atlas 200I/500 A2 inference products	√
Atlas inference products	√
Atlas training products	☓

Function

Obtains the buffer size required for image decoding. This API is used in the following scenarios: calculating the internal buffer size required for video decoding (configure the related channel parameters during initialization); calculating the output buffer size required for image decoding.

Prototype

hi_u32 hi_vdec_get_pic_buf_size(hi_payload_type type, hi_pic_buf_attr *buf_attr)

Parameters

Parameter	Input/Output	Description
type	Input	Decoded video type. Currently, HI_PT_H264, HI_PT_JPEG, and HI_PT_H265 are supported.
buf_attr	Input	Pointer to the image buffer information.

Returns

Image size required for image storage.

For HI_PT_JPEG decoding (using JPEGD), if pixel_format is set to an unsupported format or HI_PIXEL_FORMAT_UNKNOWN, 0 is returned.

Reference

For details about the API call sequence and example, see VDEC.

Parent topic: VDEC/JPEGD