[x265] [PATCH] IDCT: C code optimization as per new interface

[praveen at multicorewareinc.com]

# HG changeset patch
# User Praveen Tiwari
# Date 1414492528 -19800
# Node ID b94b25c88de7cd7df4e2f3c223e2e229488b7d54
# Parent  be9f280c503f7128b8e7f6aff5e983c76f3796c0
IDCT: C code optimization as per new interface

diff -r be9f280c503f -r b94b25c88de7 source/common/dct.cpp
--- a/source/common/dct.cpp	Tue Oct 28 15:41:06 2014 +0530
+++ b/source/common/dct.cpp	Tue Oct 28 16:05:28 2014 +0530
@@ -530,18 +530,7 @@
     ALIGN_VAR_32(int16_t, coef[4 * 4]);
     ALIGN_VAR_32(int16_t, block[4 * 4]);
 
-#define N (4)
-    for (int i = 0; i < N; i++)
-    {
-        for (int j = 0; j < N; j++)
-        {
-            block[i * N + j] = (int16_t)src[i * N + j];
-        }
-    }
-
-#undef N
-
-    partialButterflyInverse4(block, coef, shift_1st, 4); // Forward DST BY FAST ALGORITHM, block input, coef output
+    partialButterflyInverse4(src, coef, shift_1st, 4); // Forward DST BY FAST ALGORITHM, block input, coef output
     partialButterflyInverse4(coef, block, shift_2nd, 4); // Forward DST BY FAST ALGORITHM, coef input, coeff output
 
     for (int i = 0; i < 4; i++)
@@ -558,18 +547,7 @@
     ALIGN_VAR_32(int16_t, coef[8 * 8]);
     ALIGN_VAR_32(int16_t, block[8 * 8]);
 
-#define N (8)
-    for (int i = 0; i < N; i++)
-    {
-        for (int j = 0; j < N; j++)
-        {
-            block[i * N + j] = (int16_t)src[i * N + j];
-        }
-    }
-
-#undef N
-
-    partialButterflyInverse8(block, coef, shift_1st, 8);
+    partialButterflyInverse8(src, coef, shift_1st, 8);
     partialButterflyInverse8(coef, block, shift_2nd, 8);
     for (int i = 0; i < 8; i++)
     {
@@ -585,18 +563,7 @@
     ALIGN_VAR_32(int16_t, coef[16 * 16]);
     ALIGN_VAR_32(int16_t, block[16 * 16]);
 
-#define N (16)
-    for (int i = 0; i < N; i++)
-    {
-        for (int j = 0; j < N; j++)
-        {
-            block[i * N + j] = (int16_t)src[i * N + j];
-        }
-    }
-
-#undef N
-
-    partialButterflyInverse16(block, coef, shift_1st, 16);
+    partialButterflyInverse16(src, coef, shift_1st, 16);
     partialButterflyInverse16(coef, block, shift_2nd, 16);
     for (int i = 0; i < 16; i++)
     {
@@ -612,18 +579,7 @@
     ALIGN_VAR_32(int16_t, coef[32 * 32]);
     ALIGN_VAR_32(int16_t, block[32 * 32]);
 
-#define N (32)
-    for (int i = 0; i < N; i++)
-    {
-        for (int j = 0; j < N; j++)
-        {
-            block[i * N + j] = (int16_t)src[i * N + j];
-        }
-    }
-
-#undef N
-
-    partialButterflyInverse32(block, coef, shift_1st, 32);
+    partialButterflyInverse32(src, coef, shift_1st, 32);
     partialButterflyInverse32(coef, block, shift_2nd, 32);
 
     for (int i = 0; i < 32; i++)