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Add HEVC RefPicSetLtCurr and NumPocLtCurr picture parameters #853

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@nowrep nowrep commented Apr 29, 2025

Corresponds to the variables of same name as defined in section 8.3.2 of the HEVC spec.

The RefPicSetStCurrBefore and RefPicSetStCurrAfter can be derived by sorting them, however there is no defined order for the RefPicSetLtCurr and thus it must be provided explicitly.

This is needed for AMD driver and also to match the DXVA and Vulkan Video interfaces.

Corresponds to the variables of same name as defined in section 8.3.2
of the HEVC spec.

The RefPicSetStCurrBefore and RefPicSetStCurrAfter can be derived
by sorting them, however there is no defined order for the
RefPicSetLtCurr and thus it must be provided explicitly.

This is needed for AMD driver and also to match the DXVA and Vulkan
Video interfaces.

Signed-off-by: David Rosca <[email protected]>
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RefPicSetStCurrBefore, RefPicSetStCurrAfter and RefPicSetLtCurr could be all derived by sorting ReferenceFrames. And you can refer to it in media driver.

https://github.com/intel/media-driver/blob/master/media_softlet/linux/common/codec/ddi/dec/ddi_decode_hevc_specific.cpp#L402

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