hi_mpi_sys_get_chn_csc_matrix

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 CSC matrix parameters of a channel after the channel is created.

If hi_mpi_sys_set_chn_csc_matrix has not been called to set the CSC matrix parameters, the default CSC matrix parameters following the BT.601 Wide standard are returned.

Prototype

hi_s32 hi_mpi_sys_get_chn_csc_matrix(hi_mod_id mode, hi_s32 chn, hi_csc_matrix *csc_matrix, hi_csc_coefficient *csc_coefficient)

Parameters

Parameter	Input/Output	Description
mode	Input	mode: module ID, either HI_ID_VDEC or HI_ID_VPC.
chn	Input	Channel ID. When mode is set to HI_ID_VDEC, for details about the channel ID range, see the value range of chn in hi_mpi_vdec_create_chn. When mode is set to HI_ID_VPC, for details about the channel ID range, see the value range of chn in hi_mpi_vpc_create_chn.
csc_matrix	Output	Pointer to the data standard of the CSC matrix.
csc_coefficient	Output	Pointer to the CSC matrix parameter value.

Returns

0: success
Other values: failure. For details, see Common Return Codes.

Parent topic: Common APIs