hi_mpi_vpss_get_chn_fd
Applicability
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Product |
Supported |
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☓ |
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√ |
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☓ |
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Description
Obtains the device file handle corresponding to a VPSS channel.
Prototype
hi_s32 hi_mpi_vpss_get_chn_fd(hi_vpss_grp grp, hi_vpss_chn chn)
Parameters
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Parameter |
Input/Output |
Description |
|---|---|---|
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grp |
Input |
VPSS group ID. The value range is [0, 264). If the 3DNR function is enabled by setting the hi_vpss_grp_attr.nr_en parameter of the hi_mpi_vpss_create_grp API, the value range of the VPSS group ID is [256, 268). |
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chn |
Input |
VPSS channel ID. Value range: [0, 2) |
Returns
If the value is greater than or equal to 0, the API is successfully called and the corresponding handle is returned. Otherwise, the API fails to be called.