-fn clip_u8(val: i16) -> u8 { val.max(0).min(255) as u8 }
-
-pub fn do_mc(frm: &mut NASimpleVideoFrame<u8>, refpic: NAVideoBufferRef<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV) {
- let mode = ((mv.x & 3) + (mv.y & 3) * 4) as usize;
- copy_block(frm, refpic.clone(), 0, xpos, ypos, mv.x >> 2, mv.y >> 2, w, h, 2, 3, mode, H264_LUMA_INTERP);
-
- let (cw, ch) = refpic.get_dimensions(1);
- let mvx = mv.x >> 3;
- let mvy = mv.y >> 3;
- let dx = (mv.x & 7) as u16;
- let dy = (mv.y & 7) as u16;
- let mut ebuf = [0u8; 18 * 9];
- let src_x = ((xpos >> 1) as isize) + (mvx as isize);
- let src_y = ((ypos >> 1) as isize) + (mvy as isize);
- let suoff = refpic.get_offset(1);
- let svoff = refpic.get_offset(2);
- let sustride = refpic.get_stride(1);
- let svstride = refpic.get_stride(2);
- let src = refpic.get_data();
- let cbw = w / 2;
- let cbh = h / 2;
- let (csrc, cstride) = if (src_x < 0) || (src_x + (cbw as isize) + 1 > (cw as isize)) || (src_y < 0) || (src_y + (cbh as isize) + 1 > (ch as isize)) {
- edge_emu(&refpic, src_x, src_y, cbw+1, cbh+1, &mut ebuf, 18, 1, 4);
- edge_emu(&refpic, src_x, src_y, cbw+1, cbh+1, &mut ebuf[9..], 18, 2, 4);
- ([&ebuf, &ebuf[9..]], [18, 18])
- } else {
- ([&src[suoff + (src_x as usize) + (src_y as usize) * sustride..],
- &src[svoff + (src_x as usize) + (src_y as usize) * svstride..]],
- [sustride, svstride])
- };
- for chroma in 1..3 {
- let off = frm.offset[chroma] + xpos / 2 + (ypos / 2) * frm.stride[chroma];
- chroma_interp(&mut frm.data[off..], frm.stride[chroma], csrc[chroma - 1], cstride[chroma - 1], dx, dy, cbw, cbh);
- }
-}
-
-pub fn gray_block(frm: &mut NASimpleVideoFrame<u8>, x: usize, y: usize, w: usize, h: usize) {
- let yoff = frm.offset[0] + x + y * frm.stride[0];
- let coff = [frm.offset[1] + x / 2 + y / 2 * frm.stride[1],
- frm.offset[2] + x / 2 + y / 2 * frm.stride[2]];
- if w == 16 && h == 16 {
- IPRED_FUNCS16X16[IPRED8_DC128](frm.data, yoff, frm.stride[0]);
- for chroma in 1..2 {
- IPRED_FUNCS8X8_CHROMA[IPRED8_DC128](frm.data, coff[chroma - 1], frm.stride[chroma]);
- }
- } else if w == 8 && h == 8 {
- IPRED_FUNCS8X8_CHROMA[IPRED8_DC128](frm.data, yoff, frm.stride[0]);
- for chroma in 1..2 {
- IPRED_FUNCS4X4[IPRED4_DC128](frm.data, coff[chroma - 1], frm.stride[chroma], &[128; 4]);
- }
- } else {
- for row in frm.data[yoff..].chunks_mut(frm.stride[0]).take(h) {
- for el in row[..w].iter_mut() {
- *el = 128;
- }
- }
- for chroma in 0..2 {
- for row in frm.data[coff[chroma]..].chunks_mut(frm.stride[chroma + 1]).take(h / 2) {
- for el in row[..w / 2].iter_mut() {
- *el = 128;
- }
- }
- }
- }
-}
-
-pub fn do_mc_avg(frm: &mut NASimpleVideoFrame<u8>, refpic: NAVideoBufferRef<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV, avg_buf: &mut NAVideoBufferRef<u8>) {
- let mut afrm = NASimpleVideoFrame::from_video_buf(avg_buf).unwrap();
- let amv = MV { x: mv.x + (xpos as i16) * 4, y: mv.y + (ypos as i16) * 4 };
- do_mc(&mut afrm, refpic, 0, 0, w, h, amv);
- for comp in 0..3 {
- let shift = if comp == 0 { 0 } else { 1 };
- avg(&mut frm.data[frm.offset[comp] + (xpos >> shift) + (ypos >> shift) * frm.stride[comp]..], frm.stride[comp], &afrm.data[afrm.offset[comp]..], afrm.stride[comp], w >> shift, h >> shift);
- }
-}
-