imdct3_gen.vhd

MP3的VHDL源码

lohi := lohi - s0;
lohi := lohi + fix_mul(dct_in(5), 1024045778);
lohi := lohi + fix_mul(dct_in(6), 232400265);
lohi := lohi + fix_mul(dct_in(8), -46835960);
lohi := lohi + fix_mul(dct_in(9), 1072719859);
lohi := lohi - s42;
lohi := lohi + fix_mul(dct_in(11), -1048289855);
lohi := lohi + fix_mul(dct_in(12), 322880393);
lohi := lohi + fix_mul(dct_in(14), -495798798);
lohi := lohi + fix_mul(dct_in(15), -905584669);
lohi := lohi + fix_mul(dct_in(17), 791645512);
res := lohi;
rawout(17) := res;

lohi := fix_mul(dct_in(0), -791645512);
lohi := lohi - s370;
lohi := lohi + fix_mul(dct_in(2), 905584669);
lohi := lohi + fix_mul(dct_in(3), -495798798);
lohi := lohi + s8;
lohi := lohi + fix_mul(dct_in(5), 322880393);
lohi := lohi + fix_mul(dct_in(6), 1048289855);
lohi := lohi + fix_mul(dct_in(8), -1072719859);
lohi := lohi + fix_mul(dct_in(9), -46835960);
lohi := lohi - s477;
lohi := lohi + fix_mul(dct_in(11), 232400265);
lohi := lohi + fix_mul(dct_in(12), -1024045778);
lohi := lohi + fix_mul(dct_in(14), 952420629);
lohi := lohi + fix_mul(dct_in(15), 576921061);
lohi := lohi + fix_mul(dct_in(17), -725409461);
res := lohi;
rawout(18) := res;


lohi := fix_mul(dct_in(0), -851856662);
lohi := lohi - s218;
lohi := lohi + fix_mul(dct_in(2), 1064555813);
lohi := lohi + fix_mul(dct_in(3), 140151431);
lohi := lohi + s8;
lohi := lohi + fix_mul(dct_in(5), -653652607);
lohi := lohi + fix_mul(dct_in(6), 653652607);
lohi := lohi + fix_mul(dct_in(8), -140151431);
lohi := lohi + fix_mul(dct_in(9), -1064555813);
lohi := lohi - s325;
lohi := lohi + fix_mul(dct_in(11), 851856662);
lohi := lohi + fix_mul(dct_in(12), 851856662);
lohi := lohi + fix_mul(dct_in(14), -1064555813);
lohi := lohi + fix_mul(dct_in(15), -140151431);
lohi := lohi + fix_mul(dct_in(17), 653652607);
res := lohi;
rawout(19) := res;


lohi := fix_mul(dct_in(0), -905584669);
lohi := lohi - s66;
lohi := lohi + fix_mul(dct_in(2), 1024045778);
lohi := lohi + fix_mul(dct_in(3), 725409461);
lohi := lohi - s0;
lohi := lohi + fix_mul(dct_in(5), -1072719859);
lohi := lohi + fix_mul(dct_in(6), -495798798);
lohi := lohi + fix_mul(dct_in(8), 1048289855);
lohi := lohi + fix_mul(dct_in(9), 232400265);
lohi := lohi - s173;
lohi := lohi + fix_mul(dct_in(11), -952420629);
lohi := lohi + fix_mul(dct_in(12), 46835960);
lohi := lohi + fix_mul(dct_in(14), 791645512);
lohi := lohi + fix_mul(dct_in(15), -322880393);
lohi := lohi + fix_mul(dct_in(17), -576921061);
res := lohi;
rawout(20) := res;


lohi := fix_mul(dct_in(0), -952420629);
lohi := lohi + s66;
lohi := lohi + fix_mul(dct_in(2), 791645512);
lohi := lohi + fix_mul(dct_in(3), 1048289855);
lohi := lohi + s0;
lohi := lohi + fix_mul(dct_in(5), -576921061);
lohi := lohi + fix_mul(dct_in(6), -1072719859);
lohi := lohi + fix_mul(dct_in(8), 322880393);
lohi := lohi + fix_mul(dct_in(9), 1024045778);
lohi := lohi + s173;
lohi := lohi + fix_mul(dct_in(11), -46835960);
lohi := lohi + fix_mul(dct_in(12), -905584669);
lohi := lohi + fix_mul(dct_in(14), -232400265);
lohi := lohi + fix_mul(dct_in(15), 725409461);
lohi := lohi + fix_mul(dct_in(17), 495798798);
res := lohi;
rawout(21) := res;


lohi := fix_mul(dct_in(0), -992008094);
lohi := lohi + s218;
lohi := lohi + fix_mul(dct_in(2), 410903206);
lohi := lohi + fix_mul(dct_in(3), 992008094);
lohi := lohi - s8;
lohi := lohi + fix_mul(dct_in(5), 410903206);
lohi := lohi + fix_mul(dct_in(6), -410903206);
lohi := lohi + fix_mul(dct_in(8), -992008094);
lohi := lohi + fix_mul(dct_in(9), -410903206);
lohi := lohi + s325;
lohi := lohi + fix_mul(dct_in(11), 992008094);
lohi := lohi + fix_mul(dct_in(12), 992008094);
lohi := lohi + fix_mul(dct_in(14), -410903206);
lohi := lohi + fix_mul(dct_in(15), -992008094);
lohi := lohi + fix_mul(dct_in(17), -410903206);
res := lohi;
rawout(22) := res;


lohi := fix_mul(dct_in(0), -1024045778);
lohi := lohi + s370;
lohi := lohi + fix_mul(dct_in(2), -46835960);
lohi := lohi + fix_mul(dct_in(3), 576921061);
lohi := lohi - s8;
lohi := lohi + fix_mul(dct_in(5), 1048289855);
lohi := lohi + fix_mul(dct_in(6), 725409461);
lohi := lohi + fix_mul(dct_in(8), -495798798);
lohi := lohi + fix_mul(dct_in(9), -952420629);
lohi := lohi + s477;
lohi := lohi + fix_mul(dct_in(11), -791645512);
lohi := lohi + fix_mul(dct_in(12), -232400265);
lohi := lohi + fix_mul(dct_in(14), 905584669);
lohi := lohi + fix_mul(dct_in(15), 1072719859);
lohi := lohi + fix_mul(dct_in(17), 322880393);
res := lohi;
rawout(23) := res;


lohi := fix_mul(dct_in(0), -1048289855);
lohi := lohi + s31;
lohi := lohi + fix_mul(dct_in(2), -495798798);
lohi := lohi + fix_mul(dct_in(3), -46835960);
lohi := lohi + s0;
lohi := lohi + fix_mul(dct_in(5), 791645512);
lohi := lohi + fix_mul(dct_in(6), 1024045778);
lohi := lohi + fix_mul(dct_in(8), 905584669);
lohi := lohi + fix_mul(dct_in(9), 576921061);
lohi := lohi + s42;
lohi := lohi + fix_mul(dct_in(11), -322880393);
lohi := lohi + fix_mul(dct_in(12), -725409461);
lohi := lohi + fix_mul(dct_in(14), -1072719859);
lohi := lohi + fix_mul(dct_in(15), -952420629);
lohi := lohi + fix_mul(dct_in(17), -232400265);
res := lohi;
rawout(24) := res;


lohi := fix_mul(dct_in(0), -1064555813);
lohi := lohi + s17;
lohi := lohi + fix_mul(dct_in(2), -851856662);
lohi := lohi + fix_mul(dct_in(3), -653652607);
lohi := lohi - s0;
lohi := lohi + fix_mul(dct_in(5), -140151431);
lohi := lohi + fix_mul(dct_in(6), 140151431);
lohi := lohi + fix_mul(dct_in(8), 653652607);
lohi := lohi + fix_mul(dct_in(9), 851856662);
lohi := lohi + s28;
lohi := lohi + fix_mul(dct_in(11), 1064555813);
lohi := lohi + fix_mul(dct_in(12), 1064555813);
lohi := lohi + fix_mul(dct_in(14), 851856662);
lohi := lohi + fix_mul(dct_in(15), 653652607);
lohi := lohi + fix_mul(dct_in(17), 140151431);
res := lohi;
rawout(25) := res;


lohi := fix_mul(dct_in(0), -1072719859);
lohi := lohi + s2;
lohi := lohi + fix_mul(dct_in(2), -1048289855);
lohi := lohi + fix_mul(dct_in(3), -1024045778);
lohi := lohi + s8;
lohi := lohi + fix_mul(dct_in(5), -952420629);
lohi := lohi + fix_mul(dct_in(6), -905584669);
lohi := lohi + fix_mul(dct_in(8), -791645512);
lohi := lohi + fix_mul(dct_in(9), -725409461);
lohi := lohi + s14;
lohi := lohi + fix_mul(dct_in(11), -576921061);
lohi := lohi + fix_mul(dct_in(12), -495798798);
lohi := lohi + fix_mul(dct_in(14), -322880393);
lohi := lohi + fix_mul(dct_in(15), -232400265);
lohi := lohi + fix_mul(dct_in(17), -46835960);
res := lohi;
rawout(26) := res;


rawout(27) := rawout(26);

rawout(28) := rawout(25);

rawout(29) := rawout(24);

rawout(30) := rawout(23);

rawout(31) := rawout(22);

rawout(32) := rawout(21);

rawout(33) := rawout(20);

rawout(34) := rawout(19);

rawout(35) := rawout(18);


dct_out(0 ) <= prev_line_in(0) + fix_mul(rawout(0), 0);
prev_line_out(0) <= fix_mul(rawout(18), 1072719859);
dct_out(1 ) <= prev_line_in(1) + fix_mul(rawout(1), 0);
prev_line_out(1) <= fix_mul(rawout(19), 1064555813);
dct_out(2 ) <= prev_line_in(2) + fix_mul(rawout(2), 0);
prev_line_out(2) <= fix_mul(rawout(20), 1048289855);
dct_out(3 ) <= prev_line_in(3) + fix_mul(rawout(3), 0);
prev_line_out(3) <= fix_mul(rawout(21), 1024045778);
dct_out(4 ) <= prev_line_in(4) + fix_mul(rawout(4), 0);
prev_line_out(4) <= fix_mul(rawout(22), 992008094);
dct_out(5 ) <= prev_line_in(5) + fix_mul(rawout(5), 0);
prev_line_out(5) <= fix_mul(rawout(23), 952420629);
dct_out(6 ) <= prev_line_in(6) + fix_mul(rawout(6), 140151431);
prev_line_out(6) <= fix_mul(rawout(24), 905584669);
dct_out(7 ) <= prev_line_in(7) + fix_mul(rawout(7), 410903206);
prev_line_out(7) <= fix_mul(rawout(25), 851856662);
dct_out(8 ) <= prev_line_in(8) + fix_mul(rawout(8), 653652607);
prev_line_out(8) <= fix_mul(rawout(26), 791645512);
dct_out(9 ) <= prev_line_in(9) + fix_mul(rawout(9), 851856662);
prev_line_out(9) <= fix_mul(rawout(27), 725409461);
dct_out(10) <= prev_line_in(10) + fix_mul(rawout(10), 992008094);
prev_line_out(10) <= fix_mul(rawout(28), 653652607);
dct_out(11) <= prev_line_in(11) + fix_mul(rawout(11), 1064555813);
prev_line_out(11) <= fix_mul(rawout(29), 576921061);
dct_out(12) <= prev_line_in(12) + fix_mul(rawout(12), 1073741824);
prev_line_out(12) <= fix_mul(rawout(30), 495798798);
dct_out(13 ) <= prev_line_in(13) + fix_mul(rawout(13), 1073741824);
prev_line_out(13) <= fix_mul(rawout(31), 410903206);
dct_out(14 ) <= prev_line_in(14) + fix_mul(rawout(14), 1073741824);
prev_line_out(14) <= fix_mul(rawout(32), 322880393);
dct_out(15 ) <= prev_line_in(15) + fix_mul(rawout(15), 1073741824);
prev_line_out(15) <= fix_mul(rawout(33), 232400265);
dct_out(16 ) <= prev_line_in(16) + fix_mul(rawout(16), 1073741824);
prev_line_out(16) <= fix_mul(rawout(34), 140151431);
dct_out(17 ) <= prev_line_in(17) + fix_mul(rawout(17), 1073741824);
prev_line_out(17) <= fix_mul(rawout(35), 46835960);



end process;

end behavioral;