-
- fn filter_row(&mut self, buf: &mut NAVideoBuffer<u8>, mb_y: usize, mb_w: usize, cbpi: &CBPInfo) {
- let stride = buf.get_stride(0);
- let mut off = buf.get_offset(0) + mb_y * 16 * stride;
- for mb_x in 0..mb_w {
- let coff = off;
- let coded0 = cbpi.is_coded(mb_x, 0);
- let coded1 = cbpi.is_coded(mb_x, 1);
- let q = cbpi.get_q(mb_w + mb_x);
- if mb_y != 0 {
- if coded0 && cbpi.is_coded_top(mb_x, 0) { deblock_hor(buf, 0, q, coff); }
- if coded1 && cbpi.is_coded_top(mb_x, 1) { deblock_hor(buf, 0, q, coff + 8); }
- }
- let coff = off + 8 * stride;
- if cbpi.is_coded(mb_x, 2) && coded0 { deblock_hor(buf, 0, q, coff); }
- if cbpi.is_coded(mb_x, 3) && coded1 { deblock_hor(buf, 0, q, coff + 8); }
- off += 16;
- }
- let mut leftt = false;
- let mut leftc = false;
- let mut off = buf.get_offset(0) + mb_y * 16 * stride;
- for mb_x in 0..mb_w {
- let ctop0 = cbpi.is_coded_top(mb_x, 0);
- let ctop1 = cbpi.is_coded_top(mb_x, 0);
- let ccur0 = cbpi.is_coded(mb_x, 0);
- let ccur1 = cbpi.is_coded(mb_x, 1);
- let q = cbpi.get_q(mb_w + mb_x);
- if mb_y != 0 {
- let coff = off - 8 * stride;
- let qtop = cbpi.get_q(mb_x);
- if leftt && ctop0 { deblock_ver(buf, 0, qtop, coff); }
- if ctop0 && ctop1 { deblock_ver(buf, 0, qtop, coff + 8); }
- }
- if leftc && ccur0 { deblock_ver(buf, 0, q, off); }
- if ccur0 && ccur1 { deblock_ver(buf, 0, q, off + 8); }
- leftt = ctop1;
- leftc = ccur1;
- off += 16;
- }
- let strideu = buf.get_stride(1);
- let stridev = buf.get_stride(2);
- let offu = buf.get_offset(1) + mb_y * 8 * strideu;
- let offv = buf.get_offset(2) + mb_y * 8 * stridev;
- if mb_y != 0 {
- for mb_x in 0..mb_w {
- let ctu = cbpi.is_coded_top(mb_x, 4);
- let ccu = cbpi.is_coded(mb_x, 4);
- let ctv = cbpi.is_coded_top(mb_x, 5);
- let ccv = cbpi.is_coded(mb_x, 5);
- let q = cbpi.get_q(mb_w + mb_x);
- if ctu && ccu { deblock_hor(buf, 1, q, offu + mb_x * 8); }
- if ctv && ccv { deblock_hor(buf, 2, q, offv + mb_x * 8); }
- }
- let mut leftu = false;
- let mut leftv = false;
- let offu = buf.get_offset(1) + (mb_y - 1) * 8 * strideu;
- let offv = buf.get_offset(2) + (mb_y - 1) * 8 * stridev;
- for mb_x in 0..mb_w {
- let ctu = cbpi.is_coded_top(mb_x, 4);
- let ctv = cbpi.is_coded_top(mb_x, 5);
- let qt = cbpi.get_q(mb_x);
- if leftu && ctu { deblock_ver(buf, 1, qt, offu + mb_x * 8); }
- if leftv && ctv { deblock_ver(buf, 2, qt, offv + mb_x * 8); }
- leftu = ctu;
- leftv = ctv;
- }
- }
- }
-}
-
-fn deblock_hor(buf: &mut NAVideoBuffer<u8>, comp: usize, q: u8, off: usize) {
- let stride = buf.get_stride(comp);
- let mut dptr = buf.get_data_mut();
- let mut buf = dptr.as_mut_slice();
- for x in 0..8 {
- let a = buf[off - 2 * stride + x] as i16;
- let b = buf[off - 1 * stride + x] as i16;
- let c = buf[off + 0 * stride + x] as i16;
- let d = buf[off + 1 * stride + x] as i16;
- let diff = ((a - d) * 3 + (c - b) * 8) >> 4;
- if (diff != 0) && (diff >= -32) && (diff < 32) {
- let d0 = diff.abs() * 2 - (q as i16);
- let d1 = if d0 < 0 { 0 } else { d0 };
- let d2 = diff.abs() - d1;
- let d3 = if d2 < 0 { 0 } else { d2 };
-
- let delta = if diff < 0 { -d3 } else { d3 };
-
- let b1 = b + delta;
- if b1 < 0 { buf[off - 1 * stride + x] = 0; }
- else if b1 > 255 { buf[off - 1 * stride + x] = 0xFF; }
- else { buf[off - 1 * stride + x] = b1 as u8; }
- let c1 = c - delta;
- if c1 < 0 { buf[off + x] = 0; }
- else if c1 > 255 { buf[off + x] = 0xFF; }
- else { buf[off + x] = c1 as u8; }
- }
- }
-}
-
-fn deblock_ver(buf: &mut NAVideoBuffer<u8>, comp: usize, q: u8, off: usize) {
- let stride = buf.get_stride(comp);
- let mut dptr = buf.get_data_mut();
- let mut buf = dptr.as_mut_slice();
- for y in 0..8 {
- let a = buf[off - 2 + y * stride] as i16;
- let b = buf[off - 1 + y * stride] as i16;
- let c = buf[off + 0 + y * stride] as i16;
- let d = buf[off + 1 + y * stride] as i16;
- let diff = ((a - d) * 3 + (c - b) * 8) >> 4;
- if (diff != 0) && (diff >= -32) && (diff < 32) {
- let d0 = diff.abs() * 2 - (q as i16);
- let d1 = if d0 < 0 { 0 } else { d0 };
- let d2 = diff.abs() - d1;
- let d3 = if d2 < 0 { 0 } else { d2 };
-
- let delta = if diff < 0 { -d3 } else { d3 };
-
- let b1 = b + delta;
- if b1 < 0 { buf[off - 1 + y * stride] = 0; }
- else if b1 > 255 { buf[off - 1 + y * stride] = 0xFF; }
- else { buf[off - 1 + y * stride] = b1 as u8; }
- let c1 = c - delta;
- if c1 < 0 { buf[off + y * stride] = 0; }
- else if c1 > 255 { buf[off + y * stride] = 0xFF; }
- else { buf[off + y * stride] = c1 as u8; }
- }
- }