| 1 | use nihav_core::frame::*; |
| 2 | use nihav_codec_support::codecs::blockdsp::edge_emu; |
| 3 | |
| 4 | #[allow(clippy::too_many_arguments)] |
| 5 | pub fn get_block(dst: &mut [u8], dstride: usize, src: NAVideoBufferRef<u8>, comp: usize, |
| 6 | dx: usize, dy: usize, mv_x: i16, mv_y: i16) |
| 7 | { |
| 8 | let (w, h) = src.get_dimensions(comp); |
| 9 | let sx = (dx as isize) + (mv_x as isize); |
| 10 | let sy = (dy as isize) + (mv_y as isize); |
| 11 | |
| 12 | if (sx - 2 < 0) || (sx + 8 + 2 > (w as isize)) || |
| 13 | (sy - 2 < 0) || (sy + 8 + 2 > (h as isize)) { |
| 14 | edge_emu(&src, sx - 2, sy - 2, 8 + 2 + 2, 8 + 2 + 2, |
| 15 | dst, dstride, comp, 0); |
| 16 | } else { |
| 17 | let sstride = src.get_stride(comp); |
| 18 | let soff = src.get_offset(comp); |
| 19 | let sdta = src.get_data(); |
| 20 | let sbuf: &[u8] = sdta.as_slice(); |
| 21 | let saddr = soff + ((sx - 2) as usize) + ((sy - 2) as usize) * sstride; |
| 22 | let src = &sbuf[saddr..]; |
| 23 | for (dline, sline) in dst.chunks_mut(dstride).zip(src.chunks(sstride)).take(12) { |
| 24 | dline[..12].copy_from_slice(&sline[..12]); |
| 25 | } |
| 26 | } |
| 27 | } |
| 28 | |
| 29 | pub fn calc_variance(src: &[u8], stride: usize) -> u16 { |
| 30 | let mut sum = 0; |
| 31 | let mut ssum = 0; |
| 32 | for line in src.chunks(stride * 2).take(4) { |
| 33 | for el in line.iter().take(8).step_by(2) { |
| 34 | let pix = u32::from(*el); |
| 35 | sum += pix; |
| 36 | ssum += pix * pix; |
| 37 | } |
| 38 | } |
| 39 | ((ssum * 16 - sum * sum) >> 8) as u16 |
| 40 | } |
| 41 | |
| 42 | macro_rules! mc_filter { |
| 43 | (bilinear; $a: expr, $b: expr, $c: expr) => { |
| 44 | ((u16::from($a) * (8 - $c) + u16::from($b) * $c + 4) >> 3) as u8 |
| 45 | }; |
| 46 | (bicubic; $src: expr, $off: expr, $step: expr, $coeffs: expr) => { |
| 47 | ((i32::from($src[$off - $step] ) * i32::from($coeffs[0]) + |
| 48 | i32::from($src[$off] ) * i32::from($coeffs[1]) + |
| 49 | i32::from($src[$off + $step] ) * i32::from($coeffs[2]) + |
| 50 | i32::from($src[$off + $step * 2]) * i32::from($coeffs[3]) + 64) >> 7).min(255).max(0) as u8 |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | //#[allow(snake_case)] |
| 55 | pub fn mc_bilinear(dst: &mut [u8], dstride: usize, src: &[u8], mut soff: usize, sstride: usize, mx: u16, my: u16) { |
| 56 | if my == 0 { |
| 57 | for dline in dst.chunks_mut(dstride).take(8) { |
| 58 | for i in 0..8 { |
| 59 | dline[i] = mc_filter!(bilinear; src[soff + i], src[soff + i + 1], mx); |
| 60 | } |
| 61 | soff += sstride; |
| 62 | } |
| 63 | } else if mx == 0 { |
| 64 | for dline in dst.chunks_mut(dstride).take(8) { |
| 65 | for i in 0..8 { |
| 66 | dline[i] = mc_filter!(bilinear; src[soff + i], src[soff + i + sstride], my); |
| 67 | } |
| 68 | soff += sstride; |
| 69 | } |
| 70 | } else { |
| 71 | let mut tmp = [0u8; 8]; |
| 72 | for i in 0..8 { |
| 73 | tmp[i] = mc_filter!(bilinear; src[soff + i], src[soff + i + 1], mx); |
| 74 | } |
| 75 | soff += sstride; |
| 76 | for dline in dst.chunks_mut(dstride).take(8) { |
| 77 | for i in 0..8 { |
| 78 | let cur = mc_filter!(bilinear; src[soff + i], src[soff + i + 1], mx); |
| 79 | dline[i] = mc_filter!(bilinear; tmp[i], cur, my); |
| 80 | tmp[i] = cur; |
| 81 | } |
| 82 | soff += sstride; |
| 83 | } |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | #[allow(clippy::trivially_copy_pass_by_ref)] |
| 88 | pub fn mc_bicubic(dst: &mut [u8], dstride: usize, src: &[u8], mut soff: usize, sstride: usize, coeffs_w: &[i16; 4], coeffs_h: &[i16; 4]) { |
| 89 | if coeffs_h[1] == 128 { |
| 90 | for dline in dst.chunks_mut(dstride).take(8) { |
| 91 | for i in 0..8 { |
| 92 | dline[i] = mc_filter!(bicubic; src, soff + i, 1, coeffs_w); |
| 93 | } |
| 94 | soff += sstride; |
| 95 | } |
| 96 | } else if coeffs_w[1] == 128 { // horizontal-only interpolation |
| 97 | for dline in dst.chunks_mut(dstride).take(8) { |
| 98 | for i in 0..8 { |
| 99 | dline[i] = mc_filter!(bicubic; src, soff + i, sstride, coeffs_h); |
| 100 | } |
| 101 | soff += sstride; |
| 102 | } |
| 103 | } else { |
| 104 | let mut buf = [0u8; 16 * 11]; |
| 105 | soff -= sstride; |
| 106 | for dline in buf.chunks_mut(16) { |
| 107 | for i in 0..8 { |
| 108 | dline[i] = mc_filter!(bicubic; src, soff + i, 1, coeffs_w); |
| 109 | } |
| 110 | soff += sstride; |
| 111 | } |
| 112 | let mut soff = 16; |
| 113 | for dline in dst.chunks_mut(dstride).take(8) { |
| 114 | for i in 0..8 { |
| 115 | dline[i] = mc_filter!(bicubic; buf, soff + i, 16, coeffs_h); |
| 116 | } |
| 117 | soff += 16; |
| 118 | } |
| 119 | } |
| 120 | } |