h264: drop unneeded mut

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

diff --git a/nihav-itu/src/codecs/h264/dsp/mod.rs b/nihav-itu/src/codecs/h264/dsp/mod.rs
index 69df7d6eede809e8733b0d015a76853d72b0acdd..b19225dda3c3804f7f52ae0876fba7d66e006876 100644 (file)
--- a/nihav-itu/src/codecs/h264/dsp/mod.rs
+++ b/nihav-itu/src/codecs/h264/dsp/mod.rs
@@ -156,11 +156,11 @@ pub fn idct(blk: &mut [i16; 16], qp: u8, quant_dc: bool) {
     for (el, &idx) in blk.iter_mut().zip(BLK_INDEX.iter()).skip(start) {
         *el = (*el * LEVEL_SCALE[idx][qidx]) << shift;
     }
-    for i in 0..4 {
-        transform!(blk[i], blk[i + 4], blk[i + 8], blk[i + 12], 0);
-    }
     for row in blk.chunks_mut(4) {
-        transform!(row[0], row[1], row[2], row[3], 6);
+        transform!(row[0], row[1], row[2], row[3], 0);
+    }
+    for i in 0..4 {
+        transform!(blk[i], blk[i + 4], blk[i + 8], blk[i + 12], 6);
     }
 }
 
@@ -175,35 +175,35 @@ pub fn idct_dc(blk: &mut [i16; 16], qp: u8, quant_dc: bool) {
 
 const QMAT_8X8: [[u8; 16]; 6] = [
   [
-    20, 19, 25, 24,
+    20, 19, 25, 19,
     19, 18, 24, 18,
     25, 24, 32, 24,
-    24, 18, 24, 18
+    19, 18, 24, 18
   ], [
-    22, 21, 28, 26,
+    22, 21, 28, 21,
     21, 19, 26, 19,
     28, 26, 35, 26,
-    26, 19, 26, 19
+    21, 19, 26, 19
   ], [
-    26, 24, 33, 31,
+    26, 24, 33, 24,
     24, 23, 31, 23,
     33, 31, 42, 31,
-    31, 23, 31, 23
+    24, 23, 31, 23
   ], [
-    28, 26, 35, 33,
+    28, 26, 35, 26,
     26, 25, 33, 25,
     35, 33, 45, 33,
-    33, 25, 33, 25
+    26, 25, 33, 25
   ], [
-    32, 30, 40, 38,
+    32, 30, 40, 30,
     30, 28, 38, 28,
     40, 38, 51, 38,
-    38, 28, 38, 28
+    30, 28, 38, 28
   ], [
-    36, 34, 46, 43,
+    36, 34, 46, 34,
     34, 32, 43, 32,
     46, 43, 58, 43,
-    43, 32, 43, 32
+    34, 32, 43, 32
   ]
 ];
 
@@ -521,7 +521,7 @@ impl IPred8Context {
             tl:     128,
         }
     }
-    pub fn fill(&mut self, buf: &mut [u8], idx: usize, stride: usize, has_t: bool, has_tr: bool, has_l: bool, has_tl: bool) {
+    pub fn fill(&mut self, buf: &[u8], idx: usize, stride: usize, has_t: bool, has_tr: bool, has_l: bool, has_tl: bool) {
         let mut t = [0x80u8; 19];
         let mut l = [0x80u8; 11];
         if has_t {
@@ -644,7 +644,7 @@ fn ipred_y_8x8_ver_right(buf: &mut [u8], stride: usize, ctx: &IPred8Context) {
                         (t[ix - 1] + 2 * t[ix] + t[ix + 1] + 2) >> 2
                     }
                 } else if zvr == -1 {
-                    (l[1] + 2 * l[0] + t[0] + 2) >> 2
+                    (l[1] + 2 * l[0] + t[1] + 2) >> 2
                 } else {
                     let ix = y - 2 * x;
                     (l[ix] + 2 * l[ix - 1] + l[ix - 2] + 2) >> 2
@@ -693,7 +693,7 @@ fn ipred_y_8x8_hor_down(buf: &mut [u8], stride: usize, ctx: &IPred8Context) {
                         (l[ix - 1] + 2 * l[ix] + l[ix + 1] + 2) >> 2
                     }
                 } else if zhd == -1 {
-                    (l[1] + 2 * l[0] + t[0] + 2) >> 2
+                    (l[1] + 2 * l[0] + t[1] + 2) >> 2
                 } else {
                     let ix = x - 2 * y;
                     (t[ix] + 2 * t[ix - 1] + t[ix - 2] + 2) >> 2