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use nihav_core::frame::NAVideoBufferRef;
use nihav_codec_support::codecs::blockdsp::edge_emu;
fn clip_u8(val: i16) -> u8 {
val.max(0).min(255) as u8
}
fn delta(p1: i16, p0: i16, q0: i16, q1: i16) -> i16 {
((p1 - q1).max(-128).min(127) + 3 * (q0 - p0)).max(-128).min(127)
}
pub type LoopFilterFunc = fn(buf: &mut [u8], off: usize, step: usize, stride: usize, len: usize, thr: i16, thr_inner: i16, thr_hev: i16);
pub fn simple_loop_filter(buf: &mut [u8], mut off: usize, step: usize, stride: usize, len: usize, thr: i16, _thr_inner: i16, _thr_hev: i16) {
for _ in 0..len {
let p1 = i16::from(buf[off - step * 2]);
let p0 = i16::from(buf[off - step * 1]);
let q0 = i16::from(buf[off + step * 0]);
let q1 = i16::from(buf[off + step * 1]);
let diff = (p0 - q0).abs() * 2 + ((p1 - q1).abs() >> 1);
if diff <= thr {
let diff = delta(p1, p0, q0, q1);
let diffq0 = (diff + 4).min(127) >> 3;
let diffp0 = (diff + 3).min(127) >> 3;
buf[off - step * 1] = clip_u8(p0 + diffp0);
buf[off + step * 0] = clip_u8(q0 - diffq0);
}
off += stride;
}
}
fn normal_loop_filter(buf: &mut [u8], mut off: usize, step: usize, stride: usize, len: usize, thr: i16, thr_inner: i16, thr_hev: i16, edge: bool) {
for _i in 0..len {
let p1 = i16::from(buf[off - step * 2]);
let p0 = i16::from(buf[off - step * 1]);
let q0 = i16::from(buf[off + step * 0]);
let q1 = i16::from(buf[off + step * 1]);
let diff = (p0 - q0).abs() * 2 + ((p1 - q1).abs() >> 1);
if diff <= thr {
let p3 = i16::from(buf[off - step * 4]);
let p2 = i16::from(buf[off - step * 3]);
let p1 = i16::from(buf[off - step * 2]);
let q1 = i16::from(buf[off + step * 1]);
let q2 = i16::from(buf[off + step * 2]);
let q3 = i16::from(buf[off + step * 3]);
let dp2 = p3 - p2;
let dp1 = p2 - p1;
let dp0 = p1 - p0;
let dq0 = q1 - q0;
let dq1 = q2 - q1;
let dq2 = q3 - q2;
if (dp0.abs() <= thr_inner) && (dp1.abs() <= thr_inner) &&
(dp2.abs() <= thr_inner) && (dq0.abs() <= thr_inner) &&
(dq1.abs() <= thr_inner) && (dq2.abs() <= thr_inner) {
let high_edge_variation = (dp0.abs() > thr_hev) || (dq0.abs() > thr_hev);
if high_edge_variation {
let diff = delta(p1, p0, q0, q1);
let diffq0 = (diff + 4).min(127) >> 3;
let diffp0 = (diff + 3).min(127) >> 3;
buf[off - step * 1] = clip_u8(p0 + diffp0);
buf[off + step * 0] = clip_u8(q0 - diffq0);
} else if edge {
let d = delta(p1, p0, q0, q1);
let diff0 = (d * 27 + 63) >> 7;
buf[off - step * 1] = clip_u8(p0 + diff0);
buf[off + step * 0] = clip_u8(q0 - diff0);
let diff1 = (d * 18 + 63) >> 7;
buf[off - step * 2] = clip_u8(p1 + diff1);
buf[off + step * 1] = clip_u8(q1 - diff1);
let diff2 = (d * 9 + 63) >> 7;
buf[off - step * 3] = clip_u8(p2 + diff2);
buf[off + step * 2] = clip_u8(q2 - diff2);
} else {
let diff = (3 * (q0 - p0)).max(-128).min(127);
let diffq0 = (diff + 4).min(127) >> 3;
let diffp0 = (diff + 3).min(127) >> 3;
buf[off - step * 1] = clip_u8(p0 + diffp0);
buf[off + step * 0] = clip_u8(q0 - diffq0);
let diff2 = (diffq0 + 1) >> 1;
buf[off - step * 2] = clip_u8(p1 + diff2);
buf[off + step * 1] = clip_u8(q1 - diff2);
}
}
}
off += stride;
}
}
pub fn normal_loop_filter_inner(buf: &mut [u8], off: usize, step: usize, stride: usize, len: usize, thr: i16, thr_inner: i16, thr_hev: i16) {
normal_loop_filter(buf, off, step, stride, len, thr, thr_inner, thr_hev, false);
}
pub fn normal_loop_filter_edge(buf: &mut [u8], off: usize, step: usize, stride: usize, len: usize, thr: i16, thr_inner: i16, thr_hev: i16) {
normal_loop_filter(buf, off, step, stride, len, thr, thr_inner, thr_hev, true);
}
pub fn iwht4x4(coeffs: &mut [i16; 16]) {
for i in 0..4 {
let s0 = coeffs[i];
let s1 = coeffs[i + 4];
let s2 = coeffs[i + 8];
let s3 = coeffs[i + 12];
let a1 = s0 + s3;
let b1 = s1 + s2;
let c1 = s1 - s2;
let d1 = s0 - s3;
coeffs[i] = a1 + b1;
coeffs[i + 4] = c1 + d1;
coeffs[i + 8] = a1 - b1;
coeffs[i + 12] = d1 - c1;
}
for row in coeffs.chunks_mut(4) {
let a1 = row[0] + row[3];
let b1 = row[1] + row[2];
let c1 = row[1] - row[2];
let d1 = row[0] - row[3];
row[0] = (a1 + b1 + 3) >> 3;
row[1] = (c1 + d1 + 3) >> 3;
row[2] = (a1 - b1 + 3) >> 3;
row[3] = (d1 - c1 + 3) >> 3;
}
}
pub fn iwht4x4_dc(coeffs: &mut [i16; 16]) {
let dc = (coeffs[0] + 3) >> 3;
*coeffs = [dc; 16];
}
const COS_PI8_SQRT2_MINUS1: i32 = 20091;
const SIN_PI8_SQRT2: i32 = 35468;
macro_rules! idct4 {
($s0: expr, $s1: expr, $s2: expr, $s3: expr, $shift: expr) => {{
let a1 = i32::from($s0) + i32::from($s2);
let b1 = i32::from($s0) - i32::from($s2);
let temp1 = (i32::from($s1) * SIN_PI8_SQRT2) >> 16;
let temp2 = i32::from($s3) + ((i32::from($s3) * COS_PI8_SQRT2_MINUS1) >> 16);
let c1 = temp1 - temp2;
let temp1 = i32::from($s1) + ((i32::from($s1) * COS_PI8_SQRT2_MINUS1) >> 16);
let temp2 = (i32::from($s3) * SIN_PI8_SQRT2) >> 16;
let d1 = temp1 + temp2;
let bias = (1 << $shift) >> 1;
$s0 = ((a1 + d1 + bias) >> $shift) as i16;
$s3 = ((a1 - d1 + bias) >> $shift) as i16;
$s1 = ((b1 + c1 + bias) >> $shift) as i16;
$s2 = ((b1 - c1 + bias) >> $shift) as i16;
}}
}
pub fn idct4x4(coeffs: &mut [i16; 16]) {
for i in 0..4 {
idct4!(coeffs[i], coeffs[i + 4], coeffs[i + 8], coeffs[i + 12], 0);
}
for row in coeffs.chunks_mut(4) {
idct4!(row[0], row[1], row[2], row[3], 3);
}
}
pub fn idct4x4_dc(coeffs: &mut [i16; 16]) {
let dc = (coeffs[0] + 4) >> 3;
*coeffs = [dc; 16];
}
macro_rules! interpolate {
($src: expr, $off: expr, $step: expr, $mode: expr) => {{
let s0 = i32::from($src[$off + 0 * $step]);
let s1 = i32::from($src[$off + 1 * $step]);
let a = (8 - $mode) as i32;
let b = $mode as i32;
((a * s0 + b * s1 + 4) >> 3).max(0).min(255) as u8
}}
}
const TMP_STRIDE: usize = 16;
fn mc_block_common(dst: &mut [u8], mut doff: usize, dstride: usize, src: &[u8], sstride: usize, size: usize, mx: usize, my: usize) {
if (mx == 0) && (my == 0) {
let dst = &mut dst[doff..];
for (out, src) in dst.chunks_mut(dstride).take(size).zip(src.chunks(sstride)) {
(&mut out[0..size]).copy_from_slice(&src[0..size]);
}
} else if my == 0 {
for src in src.chunks(sstride).take(size) {
for x in 0..size {
dst[doff + x] = interpolate!(src, x, 1, mx);
}
doff += dstride;
}
} else if mx == 0 {
for y in 0..size {
for x in 0..size {
dst[doff + x] = interpolate!(src, x + y * sstride, sstride, my);
}
doff += dstride;
}
} else {
let mut tmp = [0u8; TMP_STRIDE * (16 + 1)];
for (y, dst) in tmp.chunks_mut(TMP_STRIDE).take(size + 1).enumerate() {
for x in 0..size {
dst[x] = interpolate!(src, x + y * sstride, 1, mx);
}
}
for y in 0..size {
for x in 0..size {
dst[doff + x] = interpolate!(tmp, x + y * TMP_STRIDE, TMP_STRIDE, my);
}
doff += dstride;
}
}
}
fn mc_block(dst: &mut [u8], doff: usize, dstride: usize, xpos: usize, ypos: usize,
mvx: i16, mvy: i16, reffrm: NAVideoBufferRef<u8>, plane: usize,
mc_buf: &mut [u8], size: usize) {
if (mvx == 0) && (mvy == 0) {
let dst = &mut dst[doff..];
let sstride = reffrm.get_stride(plane);
let srcoff = reffrm.get_offset(plane) + xpos + ypos * sstride;
let src = &reffrm.get_data();
let src = &src[srcoff..];
for (out, src) in dst.chunks_mut(dstride).take(size).zip(src.chunks(sstride)) {
(&mut out[0..size]).copy_from_slice(&src[0..size]);
}
return;
}
let (w, h) = reffrm.get_dimensions(plane);
let wa = if plane == 0 { (w + 15) & !15 } else { (w + 7) & !7 } as isize;
let ha = if plane == 0 { (h + 15) & !15 } else { (h + 7) & !7 } as isize;
let bsize = (size as isize) + 1;
let ref_x = (xpos as isize) + ((mvx >> 3) as isize);
let ref_y = (ypos as isize) + ((mvy >> 3) as isize);
let (src, sstride) = if (ref_x < 0) || (ref_x + bsize > wa) || (ref_y < 0) || (ref_y + bsize > ha) {
edge_emu(&reffrm, ref_x, ref_y, bsize as usize, bsize as usize, mc_buf, 32, plane, 4);
(mc_buf as &[u8], 32)
} else {
let off = reffrm.get_offset(plane);
let stride = reffrm.get_stride(plane);
let data = reffrm.get_data();
(&data[off + (ref_x as usize) + (ref_y as usize) * stride..], stride)
};
let mx = (mvx & 7) as usize;
let my = (mvy & 7) as usize;
mc_block_common(dst, doff, dstride, src, sstride, size, mx, my);
}
pub fn mc_block16x16_bilin(dst: &mut [u8], doff: usize, dstride: usize, xpos: usize, ypos: usize,
mvx: i16, mvy: i16, src: NAVideoBufferRef<u8>, plane: usize, mc_buf: &mut [u8]) {
mc_block(dst, doff, dstride, xpos, ypos, mvx, mvy, src, plane, mc_buf, 16);
}
pub fn mc_block8x8_bilin(dst: &mut [u8], doff: usize, dstride: usize, xpos: usize, ypos: usize,
mvx: i16, mvy: i16, src: NAVideoBufferRef<u8>, plane: usize, mc_buf: &mut [u8]) {
mc_block(dst, doff, dstride, xpos, ypos, mvx, mvy, src, plane, mc_buf, 8);
}
pub fn mc_block4x4_bilin(dst: &mut [u8], doff: usize, dstride: usize, xpos: usize, ypos: usize,
mvx: i16, mvy: i16, src: NAVideoBufferRef<u8>, plane: usize, mc_buf: &mut [u8]) {
mc_block(dst, doff, dstride, xpos, ypos, mvx, mvy, src, plane, mc_buf, 4);
}
|
