h264: make debug and release versions of MC functions for better performance

[nihav.git] / nihav-itu / src / codecs / h264 / dsp / debug.rs

diff --git a/nihav-itu/src/codecs/h264/dsp/debug.rs b/nihav-itu/src/codecs/h264/dsp/debug.rs
new file mode 100644 (file)
index 0000000..640e597
--- /dev/null
+++ b/nihav-itu/src/codecs/h264/dsp/debug.rs
@@ -0,0 +1,212 @@
+use nihav_codec_support::codecs::blockdsp::*;
+
+use super::clip_u8;
+
+const TMP_BUF_STRIDE: usize = 32;
+
+fn interp_block1(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize, hor: bool, avg0: bool) {
+
+    let step = if hor { 1 } else { sstride };
+    let mut idx = 0;
+    let avgidx = if avg0 { step * 2 } else { step * 3 };
+
+    for dline in dst.chunks_mut(dstride).take(h) {
+        for (x, pix) in dline.iter_mut().take(w).enumerate() {
+            let t = clip_u8((       i16::from(src[idx + x])
+                             - 5  * i16::from(src[idx + x + step])
+                             + 20 * i16::from(src[idx + x + step * 2])
+                             + 20 * i16::from(src[idx + x + step * 3])
+                             - 5  * i16::from(src[idx + x + step * 4])
+                             +      i16::from(src[idx + x + step * 5])
+                             + 16) >> 5);
+            *pix = ((u16::from(t) + u16::from(src[idx + x + avgidx]) + 1) >> 1) as u8;
+        }
+        idx += sstride;
+    }
+}
+
+fn interp_block2(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize, hor: bool) {
+    let step = if hor { 1 } else { sstride };
+    let mut idx = 0;
+    for dline in dst.chunks_mut(dstride).take(h) {
+        for (x, pix) in dline.iter_mut().take(w).enumerate() {
+            *pix = clip_u8((       i16::from(src[idx + x])
+                            - 5  * i16::from(src[idx + x + step])
+                            + 20 * i16::from(src[idx + x + step * 2])
+                            + 20 * i16::from(src[idx + x + step * 3])
+                            - 5  * i16::from(src[idx + x + step * 4])
+                            +      i16::from(src[idx + x + step * 5])
+                            + 16) >> 5);
+        }
+        idx += sstride;
+    }
+}
+
+fn mc_avg_tmp(dst: &mut [u8], dstride: usize, w: usize, h: usize, tmp: &[u8], tmp2: &[u8]) {
+    for (dline, (sline0, sline1)) in dst.chunks_mut(dstride).zip(tmp.chunks(TMP_BUF_STRIDE).zip(tmp2.chunks(TMP_BUF_STRIDE))).take(h) {
+        for (pix, (&a, &b)) in dline.iter_mut().zip(sline0.iter().zip(sline1.iter())).take(w) {
+            *pix = ((u16::from(a) + u16::from(b) + 1) >> 1) as u8;
+        }
+    }
+}
+
+fn h264_mc00(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    for (dline, sline) in dst.chunks_mut(dstride).zip(src.chunks(sstride)).take(h) {
+        dline[..w].copy_from_slice(&sline[..w]);
+    }
+}
+
+fn h264_mc01(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    interp_block1(dst, dstride, &src[sstride * 2..], sstride, w, h, true, true);
+}
+
+fn h264_mc02(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    interp_block2(dst, dstride, &src[sstride * 2..], sstride, w, h, true);
+}
+
+fn h264_mc03(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    interp_block1(dst, dstride, &src[sstride * 2..], sstride, w, h, true, false);
+}
+
+fn h264_mc10(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    interp_block1(dst, dstride, &src[2..], sstride, w, h, false, true);
+}
+
+fn h264_mc11(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    let mut tmp  = [0u8; TMP_BUF_STRIDE * 16];
+    let mut tmp2 = [0u8; TMP_BUF_STRIDE * 16];
+    h264_mc02(&mut tmp,  TMP_BUF_STRIDE, src, sstride, w, h);
+    h264_mc20(&mut tmp2, TMP_BUF_STRIDE, src, sstride, w, h);
+    mc_avg_tmp(dst, dstride, w, h, &tmp, &tmp2);
+}
+
+fn h264_mc12(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    let mut tmp  = [0u8; TMP_BUF_STRIDE * 16];
+    let mut tmp2 = [0u8; TMP_BUF_STRIDE * 16];
+    h264_mc02(&mut tmp,  TMP_BUF_STRIDE, src, sstride, w, h);
+    h264_mc22(&mut tmp2, TMP_BUF_STRIDE, src, sstride, w, h);
+    mc_avg_tmp(dst, dstride, w, h, &tmp, &tmp2);
+}
+
+fn h264_mc13(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    let mut tmp  = [0u8; TMP_BUF_STRIDE * 16];
+    let mut tmp2 = [0u8; TMP_BUF_STRIDE * 16];
+    h264_mc02(&mut tmp,  TMP_BUF_STRIDE, src, sstride, w, h);
+    h264_mc20(&mut tmp2, TMP_BUF_STRIDE, &src[1..], sstride, w, h);
+    mc_avg_tmp(dst, dstride, w, h, &tmp, &tmp2);
+}
+
+fn h264_mc20(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    interp_block2(dst, dstride, &src[2..], sstride, w, h, false);
+}
+
+fn h264_mc21(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    let mut tmp  = [0u8; TMP_BUF_STRIDE * 16];
+    let mut tmp2 = [0u8; TMP_BUF_STRIDE * 16];
+    h264_mc22(&mut tmp,  TMP_BUF_STRIDE, src, sstride, w, h);
+    h264_mc20(&mut tmp2, TMP_BUF_STRIDE, src, sstride, w, h);
+    mc_avg_tmp(dst, dstride, w, h, &tmp, &tmp2);
+}
+
+fn h264_mc22(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    let mut tmp = [0i32; TMP_BUF_STRIDE * 16];
+    let mut idx = 0;
+    for dline in tmp.chunks_mut(TMP_BUF_STRIDE).take(h) {
+        for (x, pix) in dline.iter_mut().take(w + 5).enumerate() {
+            *pix =        i32::from(src[idx + x])
+                   - 5  * i32::from(src[idx + x + sstride])
+                   + 20 * i32::from(src[idx + x + sstride * 2])
+                   + 20 * i32::from(src[idx + x + sstride * 3])
+                   - 5  * i32::from(src[idx + x + sstride * 4])
+                   +      i32::from(src[idx + x + sstride * 5]);
+        }
+        idx += sstride;
+    }
+    for (dline, sline) in dst.chunks_mut(dstride).zip(tmp.chunks(TMP_BUF_STRIDE)).take(h) {
+        for (x, pix) in dline.iter_mut().take(w).enumerate() {
+            *pix = clip_u8(((sline[x] - 5 * sline[x + 1] + 20 * sline[x + 2] + 20 * sline[x + 3] - 5 * sline[x + 4] + sline[x + 5] + 512) >> 10) as i16);
+        }
+    }
+}
+
+fn h264_mc23(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    let mut tmp  = [0u8; TMP_BUF_STRIDE * 16];
+    let mut tmp2 = [0u8; TMP_BUF_STRIDE * 16];
+    h264_mc22(&mut tmp,  TMP_BUF_STRIDE, src, sstride, w, h);
+    h264_mc20(&mut tmp2, TMP_BUF_STRIDE, &src[1..], sstride, w, h);
+    mc_avg_tmp(dst, dstride, w, h, &tmp, &tmp2);
+}
+
+fn h264_mc30(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    interp_block1(dst, dstride, &src[2..], sstride, w, h, false, false);
+}
+
+fn h264_mc31(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    let mut tmp  = [0u8; TMP_BUF_STRIDE * 16];
+    let mut tmp2 = [0u8; TMP_BUF_STRIDE * 16];
+    h264_mc20(&mut tmp,  TMP_BUF_STRIDE, src, sstride, w, h);
+    h264_mc02(&mut tmp2, TMP_BUF_STRIDE, &src[sstride..], sstride, w, h);
+    mc_avg_tmp(dst, dstride, w, h, &tmp, &tmp2);
+}
+
+fn h264_mc32(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    let mut tmp  = [0u8; TMP_BUF_STRIDE * 16];
+    let mut tmp2 = [0u8; TMP_BUF_STRIDE * 16];
+    h264_mc22(&mut tmp,  TMP_BUF_STRIDE, src, sstride, w, h);
+    h264_mc02(&mut tmp2, TMP_BUF_STRIDE, &src[sstride..], sstride, w, h);
+    mc_avg_tmp(dst, dstride, w, h, &tmp, &tmp2);
+}
+
+fn h264_mc33(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, w: usize, h: usize) {
+    let mut tmp  = [0u8; TMP_BUF_STRIDE * 16];
+    let mut tmp2 = [0u8; TMP_BUF_STRIDE * 16];
+    h264_mc20(&mut tmp,  TMP_BUF_STRIDE, &src[1..], sstride, w, h);
+    h264_mc02(&mut tmp2, TMP_BUF_STRIDE, &src[sstride..], sstride, w, h);
+    mc_avg_tmp(dst, dstride, w, h, &tmp, &tmp2);
+}
+
+
+pub fn chroma_interp(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, dx: u16, dy: u16, w: usize, h: usize) {
+    let a0 = 8 - dx;
+    let a1 = dx;
+    let b0 = 8 - dy;
+    let b1 = dy;
+
+    let src1 = &src[sstride..];
+    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;
+            }
+        }
+    }
+}
+
+pub const H264_LUMA_INTERP: &[BlkInterpFunc] = &[
+    h264_mc00, h264_mc01, h264_mc02, h264_mc03,
+    h264_mc10, h264_mc11, h264_mc12, h264_mc13,
+    h264_mc20, h264_mc21, h264_mc22, h264_mc23,
+    h264_mc30, h264_mc31, h264_mc32, h264_mc33
+];