hi_mpi_sys_bind

Description

Establishes the association between a data receiver and a data source. A data receiver can be bound to only one data source. After the binding, the data generated by the data source is automatically sent to the receiver.

Restrictions

• Currently, the following binding relationships between data sources and data receivers are supported:

  Data Source	Data Receiver	Description
  VI	VPSS	VPSS group ID range: [256, 268)
  VDEC	VPSS	VPSS group ID range: [0, 256)
  VPSS	VO	VPSS group ID range: [0, 256)
  ADEC	AO	-
  AI	AENC	-

• Except for the following scenarios where the device ID or channel ID can be set to 0, set the device ID or channel ID based on the actual situation.
  • As the data source, the VI and VDEC use the channel as the sender to transmit data to other modules. If src_chn.dev_id is set to 0, the SDK does not check the input device ID.
  • When the VPSS functions as the data receiver, the device (GROUP) is used as the receiver to receive data from other modules. In this case, set dst_chn.chn_id to 0.

Prototype

hi_s32 hi_mpi_sys_bind(const hi_mpp_chn *src_chn, const hi_mpp_chn *dest_chn)

Parameters

Returns

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