hi_mpi_vo_set_chn_param
Applicable Products
Product |
Supported |
|---|---|
☓ |
|
☓ |
|
☓ |
|
√ |
|
☓ |
|
☓ |
Function
Works with the VPSS function (by calling hi_mpi_sys_bind to bind a VO channel to a VPSS channel). After the aspect ratio parameters are configured by calling this API, the VPSS implements the aspect ratio based on the parameter settings.
Prototype
hi_s32 hi_mpi_vo_set_chn_param(hi_vo_layer layer, hi_vo_chn chn, const hi_vo_chn_param *chn_param)
Parameters
Parameter |
Input/Output |
Description |
|---|---|---|
layer |
Input |
VO layer ID. Value range: [0, 9) Graphics layers and cascade video layers are not supported. |
chn |
Input |
VO channel ID. Value range: [0, 64) |
chn_param |
Input |
Pointer to video channel parameters. |
Returns
- 0: success
- Other values: failure. For details, see VO Return Codes.
Restrictions
- This is a dynamic API. This means you can call it when a VO device is enabled and the corresponding video layer and channel attribute are configured.
- When the partition mode of the video layer is set to HI_VO_PARTITION_MODE_MULTI by calling hi_mpi_vo_set_video_layer_attr, the working mode of the VPSS channel is set to HI_VPSS_CHN_MODE_AUTO by calling hi_mpi_vpss_set_chn_attr, and the aspect ratio of the input image is different from that of the channel, you can set the parameters by calling this API. Otherwise, the parameter settings are invalid.
- Currently, this API does not support multiple processes.