/* * new DCT12 */ static void dct12(real *in,real *rawout1,real *rawout2,register real *wi,register real *ts) { #define DCT12_PART1 \ in5 = in[5*3]; \ in5 += (in4 = in[4*3]); \ in4 += (in3 = in[3*3]); \ in3 += (in2 = in[2*3]); \ in2 += (in1 = in[1*3]); \ in1 += (in0 = in[0*3]); \ \ in5 += in3; in3 += in1; \ \ in2 *= COS6_1; \ in3 *= COS6_1; \ #define DCT12_PART2 \ in0 += in4 * COS6_2; \ \ in4 = in0 + in2; \ in0 -= in2; \ \ in1 += in5 * COS6_2; \ \ in5 = (in1 + in3) * tfcos12[0]; \ in1 = (in1 - in3) * tfcos12[2]; \ \ in3 = in4 + in5; \ in4 -= in5; \ \ in2 = in0 + in1; \ in0 -= in1; { real in0,in1,in2,in3,in4,in5; register real *out1 = rawout1; ts[SBLIMIT*0] = out1[0]; ts[SBLIMIT*1] = out1[1]; ts[SBLIMIT*2] = out1[2]; ts[SBLIMIT*3] = out1[3]; ts[SBLIMIT*4] = out1[4]; ts[SBLIMIT*5] = out1[5]; DCT12_PART1 { real tmp0,tmp1 = (in0 - in4); { real tmp2 = (in1 - in5) * tfcos12[1]; tmp0 = tmp1 + tmp2; tmp1 -= tmp2; } ts[(17-1)*SBLIMIT] = out1[17-1] + tmp0 * wi[11-1]; ts[(12+1)*SBLIMIT] = out1[12+1] + tmp0 * wi[6+1]; ts[(6 +1)*SBLIMIT] = out1[6 +1] + tmp1 * wi[1]; ts[(11-1)*SBLIMIT] = out1[11-1] + tmp1 * wi[5-1]; } DCT12_PART2 ts[(17-0)*SBLIMIT] = out1[17-0] + in2 * wi[11-0]; ts[(12+0)*SBLIMIT] = out1[12+0] + in2 * wi[6+0]; ts[(12+2)*SBLIMIT] = out1[12+2] + in3 * wi[6+2]; ts[(17-2)*SBLIMIT] = out1[17-2] + in3 * wi[11-2]; ts[(6+0)*SBLIMIT] = out1[6+0] + in0 * wi[0]; ts[(11-0)*SBLIMIT] = out1[11-0] + in0 * wi[5-0]; ts[(6+2)*SBLIMIT] = out1[6+2] + in4 * wi[2]; ts[(11-2)*SBLIMIT] = out1[11-2] + in4 * wi[5-2]; } in++; { real in0,in1,in2,in3,in4,in5; register real *out2 = rawout2; DCT12_PART1 { real tmp0,tmp1 = (in0 - in4); { real tmp2 = (in1 - in5) * tfcos12[1]; tmp0 = tmp1 + tmp2; tmp1 -= tmp2; } out2[5-1] = tmp0 * wi[11-1]; out2[0+1] = tmp0 * wi[6+1]; ts[(12+1)*SBLIMIT] += tmp1 * wi[1]; ts[(17-1)*SBLIMIT] += tmp1 * wi[5-1]; } DCT12_PART2 out2[5-0] = in2 * wi[11-0]; out2[0+0] = in2 * wi[6+0]; out2[0+2] = in3 * wi[6+2]; out2[5-2] = in3 * wi[11-2]; ts[(12+0)*SBLIMIT] += in0 * wi[0]; ts[(17-0)*SBLIMIT] += in0 * wi[5-0]; ts[(12+2)*SBLIMIT] += in4 * wi[2]; ts[(17-2)*SBLIMIT] += in4 * wi[5-2]; } in++; { real in0,in1,in2,in3,in4,in5; register real *out2 = rawout2; out2[12]=out2[13]=out2[14]=out2[15]=out2[16]=out2[17]=0.0; DCT12_PART1 { real tmp0,tmp1 = (in0 - in4); { real tmp2 = (in1 - in5) * tfcos12[1]; tmp0 = tmp1 + tmp2; tmp1 -= tmp2; } out2[11-1] = tmp0 * wi[11-1]; out2[6 +1] = tmp0 * wi[6+1]; out2[0+1] += tmp1 * wi[1]; out2[5-1] += tmp1 * wi[5-1]; } DCT12_PART2 out2[11-0] = in2 * wi[11-0]; out2[6 +0] = in2 * wi[6+0]; out2[6 +2] = in3 * wi[6+2]; out2[11-2] = in3 * wi[11-2]; out2[0+0] += in0 * wi[0]; out2[5-0] += in0 * wi[5-0]; out2[0+2] += in4 * wi[2]; out2[5-2] += in4 * wi[5-2]; } }