fix inverse quant

Author: yistLin

inc/qdct.h

@@ -6,7 +6,7 @@
 
 // MAX QP for luma is 51, MAX QP for chroma is 39
 const int LUMA_QP = 28;
-const int CHROMA_QP = 8;
+const int CHROMA_QP = 28;
 const int mat_MF[6][3] = {
  {13107, 5243, 8066},
  {11916, 4660, 7490},

src/qdct.cpp

@@ -495,13 +495,13 @@ inline void inverse_qdct(T& block, const int BLOCK_SIZE, const int QP) {
  if (BLOCK_SIZE == 16) {
  for (int i = 0; i < 4; i++) {
  for (int j = 0; j < 4; j++)
- block[i*4*BLOCK_SIZE + j*4] = int(mat16[i][j] / 8.0 + 0.5);
+ block[i*4*BLOCK_SIZE + j*4] = mat16[i][j];
  }
  }
  else { // BLOCK_SIZE = 8
  for (int i = 0; i < 2; i++) {
  for (int j = 0; j < 2; j++)
- block[i*4*BLOCK_SIZE + j*4] = int(mat8[i][j] / 8.0 + 0.5);
+ block[i*4*BLOCK_SIZE + j*4] = mat8[i][j];
  }
  }