1 use super::types::Block;
12 fn clip8(a: i16) -> u8 {
14 else if a > 255 { 255 }
18 pub struct RefMBData {
25 pub fn new() -> Self {
32 pub fn copy_from(&mut self, other: &Self) {
33 self.y.copy_from_slice(&other.y);
34 self.u.copy_from_slice(&other.u);
35 self.v.copy_from_slice(&other.v);
37 pub fn calc_coeffs(&self, new: &Self, coeffs: &mut [Block; 25], q_dc: usize, q_ac: usize, is16: bool) {
38 let (blocks, dcs) = coeffs.split_at_mut(24);
39 let mut dblocks = blocks.iter_mut();
40 let dcs = &mut dcs[0];
41 for (y, (dstripe, sstripe)) in self.y.chunks(16 * 4).zip(new.y.chunks(16 * 4)).enumerate() {
42 for x in (0..16).step_by(4) {
43 let dst = dblocks.next().unwrap();
44 Self::diff_blk(&sstripe[x..], &dstripe[x..], 16, dst);
47 dcs.coeffs[x / 4 + y * 4] = dst.coeffs[0];
50 dst.quant(q_ac, q_ac);
53 let (cq_dc, cq_ac) = chroma_quants(q_ac);
54 for (dstripe, sstripe) in self.u.chunks(8 * 4).zip(new.u.chunks(8 * 4)) {
55 for x in (0..8).step_by(4) {
56 let dst = dblocks.next().unwrap();
57 Self::diff_blk(&sstripe[x..], &dstripe[x..], 8, dst);
59 dst.quant(cq_dc, cq_ac);
62 for (dstripe, sstripe) in self.v.chunks(8 * 4).zip(new.v.chunks(8 * 4)) {
63 for x in (0..8).step_by(4) {
64 let dst = dblocks.next().unwrap();
65 Self::diff_blk(&sstripe[x..], &dstripe[x..], 8, dst);
67 dst.quant(cq_dc, cq_ac);
71 coeffs[24].transform_dcs();
72 coeffs[24].quant_dcs(q_dc, q_ac);
75 fn diff_blk(src: &[u8], new: &[u8], stride: usize, dst: &mut Block) {
76 for (drow, (sline, nline)) in dst.coeffs.chunks_mut(4).zip(src.chunks(stride).zip(new.chunks(stride))) {
77 for (dst, (&a, &b)) in drow.iter_mut().zip(sline.iter().zip(nline.iter())) {
78 *dst = i16::from(a) - i16::from(b);
82 pub fn avg(&mut self, ref1: &Self, weight1: u32, ref2: &Self, weight2: u32) {
83 for (dst, (&src1, &src2)) in self.y.iter_mut().zip(ref1.y.iter().zip(ref2.y.iter())) {
84 *dst = weight(src1, weight1, src2, weight2);
86 for (dst, (&src1, &src2)) in self.u.iter_mut().zip(ref1.u.iter().zip(ref2.u.iter())) {
87 *dst = weight(src1, weight1, src2, weight2);
89 for (dst, (&src1, &src2)) in self.v.iter_mut().zip(ref1.v.iter().zip(ref2.v.iter())) {
90 *dst = weight(src1, weight1, src2, weight2);
95 fn weight(pix1: u8, weight1: u32, pix2: u8, weight2: u32) -> u8 {
96 ((((u32::from(pix1) * weight1) >> 9) + ((u32::from(pix2) * weight2) >> 9) + 0x10) >> 5) as u8
99 pub fn chroma_quants(q: usize) -> (usize, usize) {
100 (RV34_CHROMA_QUANT_DC[q].into(), RV34_CHROMA_QUANT_AC[q].into())
103 const RV34_CHROMA_QUANT_DC: [u8; 32] = [
104 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
105 14, 15, 15, 16, 17, 18, 18, 19, 20, 20, 21, 21, 22, 22, 23, 23
107 const RV34_CHROMA_QUANT_AC: [u8; 32] = [
108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
109 16, 17, 17, 18, 19, 20, 20, 21, 22, 22, 23, 23, 24, 24, 25, 25