static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp){ const int qmul= dequant_coeff[qp][0];
static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp){    const int qmul= dequant_coeff[qp][0];    const int stride= 16*2;    const int xStride= 16;    int a,b,c,d,e;    a= block[stride*0 + xStride*0];    b= block[stride*0 + xStride*1];    c= block[stride*1 + xStride*0];    d= block[stride*1 + xStride*1];    e= a-b;    a= a+b;    b= c-d;    c= c+d;    block[stride*0 + xStride*0]= ((a+c)*qmul + 0)>>1;    block[stride*0 + xStride*1]= ((e+b)*qmul + 0)>>1;    block[stride*1 + xStride*0]= ((a-c)*qmul + 0)>>1;    block[stride*1 + xStride*1]= ((e-b)*qmul + 0)>>1;}