STRUCT V4L2_AV1_LOOP_RESTORATION(9)

✨ NAME ✨

okay so this is the manual page for struct v4l2_..._restoration(9) from the Kernel API Manual, and the actual main character is struct v4l2_av1_loop_restoration — AV1 Loop Restauration as described in section 6.10.15 "Loop restoration params semantics" of the AV1 specification. yes bestie, “Restauration” is right there in the original, we are not fixing the icon 💅

🎀 SYNOPSIS 🎀

here is the exact shape, no edits, no vibes-based rewriting:

       struct v4l2_av1_loop_restoration {
           __u8 flags;
           __u8 lr_unit_shift;
           __u8 lr_uv_shift;
           __u8 reserved;
           enum v4l2_av1_frame_restoration_type
       frame_restoration_type[V4L2_AV1_NUM_PLANES_MAX];
           __u32 loop_restoration_size[V4L2_AV1_MAX_NUM_PLANES];
        };

💖 Members 💖

okay let’s go field by field, bestie — every single one is here:

• flags — see V4L2_AV1_LOOP_RESTORATION_FLAG_{}. that’s the flag situation, periodt.
• lr_unit_shift — specifies if the luma restoration size should be halved. half the luma size, got it? 🫶
• lr_uv_shift — specifies if the chroma size should be half the luma size. chroma stays in its lane relative to luma ✨
• reserved — padding field. Should be zeroed by applications. like fr fr, zero it — do not leave mystery bytes in there 🙈
• frame_restoration_type — specifies the type of restoration used for each plane. See enum v4l2_av1_frame_restoration_type. one type per plane, cute and organized 🎀
• loop_restoration_size — specifies the size of loop restoration units in units of samples in the current plane. samples, current plane, that’s the unit math 💅

🌈 SEE ALSO 🌈

the kernel file is ./include/uapi/linux/v4l2-controls.h, and the whole group chat is:

• enum v4l2_mpeg_video_av1_profile(9)
• enum v4l2_mpeg_video_av1_level(9)
• enum v4l2_stateless_h264_decode_mode(9)
• enum v4l2_stateless_h264_start_code(9)
• struct v4l2_ctrl_h264_sps(9)
• struct v4l2_ctrl_h264_pps(9)
• struct v4l2_ctrl_h264_scaling_matrix(9)
• struct v4l2_ctrl_h264_pred_weights(9)
• struct v4l2_h264_reference(9)
• struct v4l2_ctrl_h264_slice_params(9)
• struct v4l2_h264_dpb_entry(9)
• struct v4l2_ctrl_h264_decode_params(9)
• struct v4l2_ctrl_fwht_params(9)
• struct v4l2_vp8_segment(9)
• struct v4l2_vp8_loop_filter(9)
• struct v4l2_vp8_quantization(9)
• struct v4l2_vp8_entropy(9)
• struct v4l2_vp8_entropy_coder_state(9)
• struct v4l2_ctrl_vp8_frame(9)
• struct v4l2_ctrl_mpeg2_sequence(9)
• struct v4l2_ctrl_mpeg2_picture(9)
• struct v4l2_ctrl_mpeg2_quantisation(9)
• struct v4l2_ctrl_hevc_sps(9)
• struct v4l2_ctrl_hevc_pps(9)
• struct v4l2_hevc_dpb_entry(9)
• struct v4l2_hevc_pred_weight_table(9)
• struct v4l2_ctrl_hevc_slice_params(9)
• struct v4l2_ctrl_hevc_decode_params(9)
• struct v4l2_ctrl_hevc_scaling_matrix(9)
• struct v4l2_vp9_loop_filter(9)
• struct v4l2_vp9_quantization(9)
• struct v4l2_vp9_segmentation(9)
• struct v4l2_ctrl_vp9_frame(9)
• struct v4l2_vp9_mv_probs(9)
• struct v4l2_ctrl_vp9_compressed_hdr(9)
• struct v4l2_ctrl_av1_sequence(9)
• struct v4l2_ctrl_av1_tile_group_entry(9)
• enum v4l2_av1_warp_model(9)
• enum v4l2_av1_reference_frame(9)
• struct v4l2_av1_global_motion(9)
• enum v4l2_av1_frame_restoration_type(9)
• struct v4l2_av1_cdef(9)
• enum v4l2_av1_segment_feature(9)
• struct v4l2_av1_segmentation(9)
• struct v4l2_av1_loop_filter(9)
• struct v4l2_av1_quantization(9)
• struct v4l2_av1_tile_info(9)
• enum v4l2_av1_frame_type(9)
• enum v4l2_av1_interpolation_filter(9)
• enum v4l2_av1_tx_mode(9)
• struct v4l2_ctrl_av1_frame(9)
• struct v4l2_ctrl_av1_film_grain(9)

mwah 💋 footer check, bestie: this page lives under ./include/uapi/linux, it’s dated October 2026, and the footer title is struct v4l2_..._restoration(9) — go zero that reserved field and slay the rest of your day 🫶✨