hi_mpi_vdec_set_chn_param

Applicability

Product	Supported
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	☓

Description

Sets the decoding channel parameters.

Prototype

hi_s32 hi_mpi_vdec_set_chn_param (hi_vdec_chn chn, const hi_vdec_chn_param *chn_param)

Parameters

Parameter	Input/Output	Description
chn	Input	Decoding channel ID. 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. 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 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.
chn_param	Input	Pointer to the decoding channel parameters.

Parameter

Input/Output

Description

chn

Input

Decoding channel ID.

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.

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 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.

chn_param

Input

Pointer to the decoding channel parameters.

Returns

0: success
Other values: failure. For details, see VDEC/JPEGD Return Codes.

Restrictions

Ensure that a channel has been created. Otherwise, the error code HI_ERR_VDEC_UNEXIST is returned.
This API can be used to set advanced channel parameters. A created channel has default values for these parameters, as described in hi_vdec_chn_param.
If the value of a parameter is out of the valid range, the error code HI_ERR_VDEC_ILLEGAL_PARAM is returned. For the value range of each parameter, see the description of hi_vdec_chn_param.
Set streams to be sent by frame (the only mode supported currently) when creating a channel by calling the hi_mpi_vdec_create_chn API. Call this API to set the output stream order to the decoding sequence, that is, set chn_param->video_param.out_order of this API to HI_VIDEO_OUT_ORDER_DEC. In this way, streams can be decoded and output quickly. However, this method is not applicable to streams containing B-frames.

hi_mpi_vdec_set_chn_param

Applicability

Description

Prototype

Parameters

Returns

Restrictions

See Also