hi_mpi_vdec_start_recv_stream

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

Starts receiving streams sent by the user after a channel is created and before decoding starts.

Prototype

hi_s32 hi_mpi_vdec_start_recv_stream(hi_vdec_chn chn)

Parameters

Parameter	Input/Output	Description
chn	Input	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 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.

Parameter

Input/Output

Description

chn

Input

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 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.

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.
Call this API before the hi_mpi_vdec_send_stream call.
Repeated calls to this API return successful responses.

Reference

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

Parent topic: VDEC/JPEGD