https://docs.amd.com/r/en-US/pg252-vcu/AL_SET_BITDEPTH_LUMA-PicFmt-BitDepth?contentId=vSWfOQrFIaxzKcM0SLiisQ
AL_SET_BITDEPTH_LUMA(PicFmt, BitDepth) - AL_SET_BITDEPTH_LUMA(PicFmt, BitDepth) - 2025.1 English -...
Return Assigns BitDepth to the low-order byte (byte 0) of PicFmt. PicFmt must be an AL_EPicFormat value. See AL_EPicFormat
alsetbitdepthlumaenglish
https://aomedia.googlesource.com/aom/+/12adc723acf02633595a4d8da8345742729f46c0/aom_dsp/x86/bitdepth_conversion_sse2.h
aom_dsp/x86/bitdepth_conversion_sse2.h - aom - Git at Google
aomdspbitdepthconversiongit