hi_mpi_vo_resume_chn
Applicability
Product |
Supported |
|---|---|
Atlas 350 Accelerator Card |
☓ |
☓ |
|
☓ |
|
√ |
|
☓ |
|
☓ |
Function Description
Resumes a specified VO channel.
Prototype
hi_s32 hi_mpi_vo_resume_chn(hi_vo_layer layer, hi_vo_chn chn)
Parameters
Parameter |
Input/Output |
Description |
|---|---|---|
layer |
Input |
VO layer ID. Value range: [0, 9) This parameter is valid only when layer is set to 0 or 1. |
chn |
Input |
VO channel ID. Value range: [0, 64) |
Returns
- 0: success
- Other values: failure. For details, see VO Return Codes.
Restrictions
- This API can be called only after the hi_mpi_vo_enable_chn API is called to enable a channel.
- If the split mode of the video layer is set to HI_VO_PARTITION_MODE_SINGLE by calling hi_mpi_vo_set_video_layer_attr, the specified channel cannot be restored. In this case, the parameters set by calling this API are invalid, but the video display result is not affected.
- When the hi_mpi_vo_send_frame interface is called to send video images to a specified output channel for display, at least two image frames need to be rotated (that is, two hi_video_frame_info structure variables need to be defined). Otherwise, the recovery function is invalid.
- A channel can be resumed repeatedly, and no error code indicating failure is returned.
- Currently, this API does not support multiple processes.
Parent topic: VO