From d85f94f7fd0c00c63c33b3bc1dcf2640ec6bd52c Mon Sep 17 00:00:00 2001 From: Kostya Shishkov Date: Wed, 27 Jul 2022 10:29:36 +0200 Subject: [PATCH] h264: fix direct 8x8 inference mode --- nihav-itu/src/codecs/h264/mod.rs | 8 ++++---- nihav-itu/src/codecs/h264/types.rs | 17 +++++++++++++---- 2 files changed, 17 insertions(+), 8 deletions(-) diff --git a/nihav-itu/src/codecs/h264/mod.rs b/nihav-itu/src/codecs/h264/mod.rs index 59fec0c..67156da 100644 --- a/nihav-itu/src/codecs/h264/mod.rs +++ b/nihav-itu/src/codecs/h264/mod.rs @@ -448,14 +448,14 @@ println!("PAFF?"); Ok(()) } - fn pred_mv(sstate: &mut SliceState, frame_refs: &FrameRefs, mb_info: &mut CurrentMBInfo, cur_id: u16, temporal_mv: bool) { + fn pred_mv(sstate: &mut SliceState, frame_refs: &FrameRefs, mb_info: &mut CurrentMBInfo, cur_id: u16, temporal_mv: bool, direct_8x8: bool) { let mb_type = mb_info.mb_type; if !mb_type.is_4x4() { let (pw, ph) = mb_type.size(); let mut xoff = 0; let mut yoff = 0; if mb_type == MBType::Direct || mb_type == MBType::BSkip { - sstate.predict_direct_mb(frame_refs, temporal_mv, cur_id); + sstate.predict_direct_mb(frame_refs, temporal_mv, direct_8x8, cur_id); } for part in 0..mb_type.num_parts() { if !mb_type.is_l1(part) { @@ -495,7 +495,7 @@ println!("PAFF?"); } } else { for sblk in 0..4 { - sstate.predict_direct_sub(frame_refs, temporal_mv, cur_id, (xoff / 4) + (sblk & 1) + (yoff / 4) * 4 + (sblk & 2) * 2); + sstate.predict_direct_sub(frame_refs, temporal_mv, direct_8x8, cur_id, (xoff / 4) + (sblk & 1) + (yoff / 4) * 4 + (sblk & 2) * 2); } } xoff += pw; @@ -575,7 +575,7 @@ println!("PAFF?"); self.sstate.reset_mb_mv(); } if !mb_info.mb_type.is_intra() { - Self::pred_mv(&mut self.sstate, &self.frame_refs, mb_info, self.cur_id, self.temporal_mv); + Self::pred_mv(&mut self.sstate, &self.frame_refs, mb_info, self.cur_id, self.temporal_mv, self.sps[self.cur_sps].direct_8x8_inference); } if !pps.constrained_intra_pred && mb_info.mb_type != MBType::Intra4x4 && mb_info.mb_type != MBType::Intra8x8 { self.sstate.fill_ipred(IntraPredMode::DC); diff --git a/nihav-itu/src/codecs/h264/types.rs b/nihav-itu/src/codecs/h264/types.rs index 0a0cc64..3456b99 100644 --- a/nihav-itu/src/codecs/h264/types.rs +++ b/nihav-itu/src/codecs/h264/types.rs @@ -445,6 +445,8 @@ pub struct SliceState { pub left_c: [[u8; 9]; 2], } +const BLK4_TO_D8: [usize; 16] = [ 0, 0, 3, 3, 0, 0, 3, 3, 12, 12, 15, 15, 12, 12, 15, 15 ]; + impl SliceState { pub fn new() -> Self { Self { @@ -765,9 +767,15 @@ impl SliceState { self.fill_mv (0, 0, 16, 16, 0, mv); self.fill_ref(0, 0, 16, 16, 0, ref_idx); } - pub fn predict_direct_mb(&mut self, frame_refs: &FrameRefs, temporal_mv: bool, cur_id: u16) { + pub fn predict_direct_mb(&mut self, frame_refs: &FrameRefs, temporal_mv: bool, direct_8x8: bool, cur_id: u16) { let (col_mb, _, _) = frame_refs.get_colocated_info(self.mb_x, self.mb_y); - if col_mb.mb_type.is_16x16_ref() || !temporal_mv { + if direct_8x8 { + for blk4 in 0..16 { + let (mv0, ref0, mv1, ref1) = self.get_direct_mv(frame_refs, temporal_mv, cur_id, BLK4_TO_D8[blk4]); + self.get_cur_blk4(blk4).mv = [mv0, mv1]; + self.get_cur_blk8(blk4_to_blk8(blk4)).ref_idx = [ref0, ref1]; + } + } else if col_mb.mb_type.is_16x16_ref() || !temporal_mv { let (mv0, ref0, mv1, ref1) = self.get_direct_mv(frame_refs, temporal_mv, cur_id, 0); self.apply_to_blk4(|blk4| blk4.mv = [mv0, mv1]); self.apply_to_blk8(|blk8| blk8.ref_idx = [ref0, ref1]); @@ -779,8 +787,9 @@ impl SliceState { } } } - pub fn predict_direct_sub(&mut self, frame_refs: &FrameRefs, temporal_mv: bool, cur_id: u16, blk4: usize) { - let (mv0, ref0, mv1, ref1) = self.get_direct_mv(frame_refs, temporal_mv, cur_id, blk4); + pub fn predict_direct_sub(&mut self, frame_refs: &FrameRefs, temporal_mv: bool, direct8x8: bool, cur_id: u16, blk4: usize) { + let src_blk = if !direct8x8 { blk4 } else { BLK4_TO_D8[blk4] }; + let (mv0, ref0, mv1, ref1) = self.get_direct_mv(frame_refs, temporal_mv, cur_id, src_blk); self.get_cur_blk4(blk4).mv = [mv0, mv1]; self.get_cur_blk8(blk4_to_blk8(blk4)).ref_idx = [ref0, ref1]; } -- 2.39.5