blk[2] = t1 + t3;
blk[3] = t1 - t3;
if qp < 6 {
- let mul = i16::from(LEVEL_SCALE[0][qp as usize]);
+ let mul = LEVEL_SCALE[0][qp as usize];
for el in blk.iter_mut() {
*el = el.wrapping_mul(mul) >> 1;
}
} else {
- let mul = i16::from(LEVEL_SCALE[0][(qp % 6) as usize]);
+ let mul = LEVEL_SCALE[0][(qp % 6) as usize];
let shift = qp / 6 - 1;
for el in blk.iter_mut() {
*el = el.wrapping_mul(mul) << shift;
pub fn idct_luma_dc(blk: &mut [i16; 16], qp: u8) {
if qp < 12 {
- let mul = i16::from(LEVEL_SCALE[0][(qp % 6) as usize]);
+ let mul = LEVEL_SCALE[0][(qp % 6) as usize];
let shift = 2 - qp / 6;
let bias = 1 << shift >> 1;
for el in blk.iter_mut() {
*el = el.wrapping_mul(mul).wrapping_add(bias) >> shift;
}
} else {
- let mul = i16::from(LEVEL_SCALE[0][(qp % 6) as usize]);
+ let mul = LEVEL_SCALE[0][(qp % 6) as usize];
let shift = qp / 6 - 2;
for el in blk.iter_mut() {
*el = el.wrapping_mul(mul) << shift;
let b1 = dy;
let src1 = &src[sstride..];
- for (drow, (line0, line1)) in dst.chunks_mut(dstride).zip(src.chunks(sstride).zip(src1.chunks(sstride))).take(h) {
- let mut a = line0[0];
- let mut c = line1[0];
- for (pix, (&b, &d)) in drow.iter_mut().take(w).zip(line0[1..].iter().zip(line1[1..].iter())) {
- *pix = ((u16::from(a) * a0 * b0 + u16::from(b) * a1 * b0 + u16::from(c) * a0 * b1 + u16::from(d) * a1 * b1 + 0x20) >> 6) as u8;
- a = b;
- c = d;
+ if a0 == 8 && b0 == 8 {
+ for (drow, line) in dst.chunks_mut(dstride).zip(src.chunks(sstride)).take(h) {
+ drow[..w].copy_from_slice(&line[..w]);
+ }
+ } else if a0 == 8 {
+ for (drow, (line0, line1)) in dst.chunks_mut(dstride).zip(src.chunks(sstride).zip(src1.chunks(sstride))).take(h) {
+ for (pix, (&a, &b)) in drow.iter_mut().take(w).zip(line0.iter().zip(line1.iter())) {
+ *pix = ((u16::from(a) * b0 + u16::from(b) * b1 + 4) >> 3) as u8;
+ }
+ }
+ } else if b0 == 8 {
+ for (drow, line) in dst.chunks_mut(dstride).zip(src.chunks(sstride)).take(h) {
+ let mut a = line[0];
+ for (pix, &b) in drow.iter_mut().take(w).zip(line.iter().skip(1)) {
+ *pix = ((u16::from(a) * a0 + u16::from(b) * a1 + 4) >> 3) as u8;
+ a = b;
+ }
+ }
+ } else {
+ for (drow, (line0, line1)) in dst.chunks_mut(dstride).zip(src.chunks(sstride).zip(src1.chunks(sstride))).take(h) {
+ let mut a = line0[0];
+ let mut c = line1[0];
+ for (pix, (&b, &d)) in drow.iter_mut().take(w).zip(line0[1..].iter().zip(line1[1..].iter())) {
+ *pix = ((u16::from(a) * a0 * b0 + u16::from(b) * a1 * b0 + u16::from(c) * a0 * b1 + u16::from(d) * a1 * b1 + 0x20) >> 6) as u8;
+ a = b;
+ c = d;
+ }
}
}
}