venc_set_jpeg_huffman_param

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

Sets the advanced JPEGE Huffman parameters of an encoding channel.

C Prototype

hi_s32 hi_mpi_venc_set_jpeg_huffman_param(hi_venc_chn chn, const hi_venc_jpeg_huffman_param *jpeg_huffman_param)

Python Function

ret = acl.himpi.venc_set_jpeg_huffman_param(chn, jpeg_huffman_param)

Parameter	Description
chn	Int, decoding channel ID. Ascend 950PR/Ascend 950DT: The value range of this parameter is [0, 256). The maximum number of channels is 256 for the JPEGD function. Atlas inference products: The value range of this parameter is [0, 256). The JPEGD and VDEC functions share the same channels, and the maximum number of channels is 256. Atlas A2 training products/Atlas A2 inference products: The value range of this parameter is [0, 256). The JPEGD and VDEC functions share the same channels, and the maximum number of channels is 256. Among them, a maximum of 256 JPEGD decoding channels and 32 VDEC decoding channels are supported. Atlas 200I/500 A2 inference products: The value range of this parameter is [0, 128). The JPEGD and VDEC functions share the same channels, and the maximum number of channels is 128. Atlas A3 training products/Atlas A3 inference products: The value range of this parameter is [0, 256). The JPEGD and VDEC functions share the same channels, and the maximum number of channels is 256. Among them, a maximum of 256 JPEGD decoding channels and 32 VDEC decoding channels are supported.
jpeg_huffman_param	Dict, dictionary of Huffman encoding parameters. For details, see hi_venc_jpeg_huffman_param.

Parameter

Description

chn

Int, decoding channel ID.

Ascend 950PR/Ascend 950DT: The value range of this parameter is [0, 256). The maximum number of channels is 256 for the JPEGD function.
Atlas inference products: The value range of this parameter is [0, 256). The JPEGD and VDEC functions share the same channels, and the maximum number of channels is 256.
Atlas A2 training products/Atlas A2 inference products: The value range of this parameter is [0, 256). The JPEGD and VDEC functions share the same channels, and the maximum number of channels is 256. Among them, a maximum of 256 JPEGD decoding channels and 32 VDEC decoding channels are supported.
Atlas 200I/500 A2 inference products: The value range of this parameter is [0, 128). The JPEGD and VDEC functions share the same channels, and the maximum number of channels is 128.
Atlas A3 training products/Atlas A3 inference products: The value range of this parameter is [0, 256). The JPEGD and VDEC functions share the same channels, and the maximum number of channels is 256. Among them, a maximum of 256 JPEGD decoding channels and 32 VDEC decoding channels are supported.

jpeg_huffman_param

Dict, dictionary of Huffman encoding parameters. For details, see hi_venc_jpeg_huffman_param.

Return Value	Description
ret	Int, error code. 0: success. Other values: failures. For details, see VENC/JPEGE Return Codes.

This API must be called after an encoding channel is created and before the channel is destroyed.

Parent topic: VENC/JPEGE APIs