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