vdec_get_protocol_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	√

Obtains protocol-specific memory allocation parameters of a channel, such as slice, pps, and sps.

C Prototype

hi_s32 hi_mpi_vdec_get_protocol_param(hi_vdec_chn chn, hi_vdec_protocol_param* protocol_param);

Python Function

protocol_param, ret = acl.himpi.vdec_get_protocol_param(chn)

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.

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.

Return Value	Description
protocol_param	Dict, dictionary of decoding channel parameters. For details, see hi_vdec_protocol_param.
ret	Int, error code. 0 indicates success. Other values indicate failure. For details, see VDEC/JPEGD Return Codes.

Ensure that a channel has been created. Otherwise, the error code HI_ERR_VDEC_UNEXIST is returned.

Parent topic: VDEC/JPEGD APIs