From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Wed, 27 Jul 2022 07:53:18 +0000 (+0200)
Subject: h264: fix transform order
X-Git-Url: https://git.nihav.org/?a=commitdiff_plain;h=3ad9bf2b25f68bbe5e6e43b0480e49c3784983cc;p=nihav.git

h264: fix transform order
---

diff --git a/nihav-itu/src/codecs/h264/dsp/mod.rs b/nihav-itu/src/codecs/h264/dsp/mod.rs
index 69df7d6..fa091c6 100644
--- 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);
     }
 }