First time modifing FFmpeg code and sending patch, please bear with me for mistakes.
Following patches add support for applying 3D LUT from file using oneVPL VPP. Limitation: The new feature is only available when `CONFIG_VAAPI` is enabled, because of my limited test environemnt and little experience with video processing. 1st patch moves some 3D LUT parse function from `vf_lut3d.c` to `lut3d.c` to expose them for use in `vf_vpp_qsv.c`. I try to move only code that deals with 3D LUT table. 2nd patch applies 3D LUT from file in `vf_vpp_qsv.c`. I followed oneVPL's document and sample code, but there are still things that are not clear to me. The LUT value type used in VPP is `mfxU16` instead of float, I choose to multiply float value with 65535 to convert to `mfxU16` and the result seems correct. Test is done on an Arch Linux system (kernel 6.5.3) with Intel Arc A380 on a Thunderbolt 3 GPU dock. I compared transcoding output with `vf_lut3d` and don't see noticeable difference with my eyes. `make fate` passes without error. Chen Yufei (2): avfilter/vf_lut3d: expose 3D LUT file parse function. avfilter/vf_vpp_qsv: apply 3D LUT from file. libavfilter/Makefile | 8 +- libavfilter/lut3d.c | 669 +++++++++++++++++++++++++++++++++++++++ libavfilter/lut3d.h | 13 + libavfilter/vf_lut3d.c | 590 +--------------------------------- libavfilter/vf_vpp_qsv.c | 242 +++++++++++++- 5 files changed, 926 insertions(+), 596 deletions(-) create mode 100644 libavfilter/lut3d.c -- 2.42.0 _______________________________________________ ffmpeg-devel mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
