mpeg2enc/fdctdata.c

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 //  fdctam32.c - AP922 MMX(3D-Now) forward-DCT
   4 //  ----------
   5 //  Intel Application Note AP-922 - fast, precise implementation of DCT
   6 //        http://developer.intel.com/vtune/cbts/appnotes.htm
   7 //  ----------
   8 //
   9 //       This routine uses a 3D-Now/MMX enhancement to increase the
  10 //  accuracy of the fdct_col_4 macro.  The dct_col function uses 3D-Now's
  11 //  PMHULHRW instead of MMX's PMHULHW(and POR).  The substitution improves
  12 //  accuracy very slightly with performance penalty.  If the target CPU
  13 //  does not support 3D-Now, then this function cannot be executed.
  14 //  fdctmm32.c contains the standard MMX implementation of AP-922.
  15 //
  16 //  For a fast, precise MMX implementation of inverse-DCT
  17 //              visit http://www.elecard.com/peter
  18 //
  19 //  v1.0 07/22/2000 (initial release)
  20 //       Initial release of AP922 MMX(3D-Now) forward_DCT.
  21 //       This code was tested with Visual C++ 6.0Pro + service_pack4 +
  22 //       processor_pack_beta!  If you have the processor_pack_beta, you can
  23 //       remove the #include for amd3dx.h, and substitute the 'normal'
  24 //       assembly lines for the macro'd versions.  Otherwise, this
  25 //       code should compile 'as is', under Visual C++ 6.0 Pro.
  26 //
  27 //  liaor@iname.com  http://members.tripod.com/~liaor
  28 //////////////////////////////////////////////////////////////////////////////
  29
  30 #include <inttypes.h>
  31
  32 //////////////////////////////////////////////////////////////////////
  33 //
  34 // constants for the forward DCT
  35 // -----------------------------
  36 //
  37 // Be sure to check that your compiler is aligning all constants to QWORD
  38 // (8-byte) memory boundaries!  Otherwise the unaligned memory access will
  39 // severely stall MMX execution.
  40 //
  41 //////////////////////////////////////////////////////////////////////
  42
  43 #define BITS_FRW_ACC    3 //; 2 or 3 for accuracy
  44 #define SHIFT_FRW_COL   BITS_FRW_ACC
  45 #define SHIFT_FRW_ROW   (BITS_FRW_ACC + 17)
  46 //#define RND_FRW_ROW           (262144 * (BITS_FRW_ACC - 1)) //; 1 << (SHIFT_FRW_ROW-1)
  47 #define RND_FRW_ROW             (1 << (SHIFT_FRW_ROW-1))
  48 //#define RND_FRW_COL           (2 * (BITS_FRW_ACC - 1)) //; 1 << (SHIFT_FRW_COL-1)
  49 #define RND_FRW_COL             (1 << (SHIFT_FRW_COL-1))
  50
  51 //concatenated table, for forward DCT transformation
  52 const int16_t fdct_tg_all_16[] = {
  53         13036, 13036, 13036, 13036,             // tg * (2<<16) + 0.5
  54         27146, 27146, 27146, 27146,             // tg * (2<<16) + 0.5
  55         -21746, -21746, -21746, -21746, // tg * (2<<16) + 0.5
  56         -19195, -19195, -19195, -19195, //cos * (2<<16) + 0.5
  57         23170, 23170, 23170, 23170 };   //cos * (2<<15) + 0.5
  58 const long long  fdct_one_corr = 0x0001000100010001LL;
  59 const long fdct_r_row[2] = {RND_FRW_ROW, RND_FRW_ROW };
  60
  61 const int16_t tab_frw_01234567[] = {  // forward_dct coeff table
  62     //row0
  63     16384, 16384, 21407, -8867,     //    w09 w01 w08 w00
  64     16384, 16384, 8867, -21407,     //    w13 w05 w12 w04
  65     16384, -16384, 8867, 21407,     //    w11 w03 w10 w02
  66     -16384, 16384, -21407, -8867,   //    w15 w07 w14 w06
  67     22725, 12873, 19266, -22725,    //    w22 w20 w18 w16
  68     19266, 4520, -4520, -12873,     //    w23 w21 w19 w17
  69     12873, 4520, 4520, 19266,       //    w30 w28 w26 w24
  70     -22725, 19266, -12873, -22725,  //    w31 w29 w27 w25
  71
  72     //row1
  73     22725, 22725, 29692, -12299,    //    w09 w01 w08 w00
  74     22725, 22725, 12299, -29692,    //    w13 w05 w12 w04
  75     22725, -22725, 12299, 29692,    //    w11 w03 w10 w02
  76     -22725, 22725, -29692, -12299,  //    w15 w07 w14 w06
  77     31521, 17855, 26722, -31521,    //    w22 w20 w18 w16
  78     26722, 6270, -6270, -17855,     //    w23 w21 w19 w17
  79     17855, 6270, 6270, 26722,       //    w30 w28 w26 w24
  80     -31521, 26722, -17855, -31521,  //    w31 w29 w27 w25
  81
  82     //row2
  83     21407, 21407, 27969, -11585,    //    w09 w01 w08 w00
  84     21407, 21407, 11585, -27969,    //    w13 w05 w12 w04
  85     21407, -21407, 11585, 27969,    //    w11 w03 w10 w02
  86     -21407, 21407, -27969, -11585,  //    w15 w07 w14 w06
  87     29692, 16819, 25172, -29692,    //    w22 w20 w18 w16
  88     25172, 5906, -5906, -16819,     //    w23 w21 w19 w17
  89     16819, 5906, 5906, 25172,       //    w30 w28 w26 w24
  90     -29692, 25172, -16819, -29692,  //    w31 w29 w27 w25
  91
  92     //row3
  93     19266, 19266, 25172, -10426,    //    w09 w01 w08 w00
  94     19266, 19266, 10426, -25172,    //    w13 w05 w12 w04
  95     19266, -19266, 10426, 25172,    //    w11 w03 w10 w02
  96     -19266, 19266, -25172, -10426,  //    w15 w07 w14 w06,
  97     26722, 15137, 22654, -26722,    //    w22 w20 w18 w16
  98     22654, 5315, -5315, -15137,     //    w23 w21 w19 w17
  99     15137, 5315, 5315, 22654,       //    w30 w28 w26 w24
 100     -26722, 22654, -15137, -26722,  //    w31 w29 w27 w25,
 101
 102     //row4
 103     16384, 16384, 21407, -8867,     //    w09 w01 w08 w00
 104     16384, 16384, 8867, -21407,     //    w13 w05 w12 w04
 105     16384, -16384, 8867, 21407,     //    w11 w03 w10 w02
 106     -16384, 16384, -21407, -8867,   //    w15 w07 w14 w06
 107     22725, 12873, 19266, -22725,    //    w22 w20 w18 w16
 108     19266, 4520, -4520, -12873,     //    w23 w21 w19 w17
 109     12873, 4520, 4520, 19266,       //    w30 w28 w26 w24
 110     -22725, 19266, -12873, -22725,  //    w31 w29 w27 w25
 111
 112     //row5
 113     19266, 19266, 25172, -10426,    //    w09 w01 w08 w00
 114     19266, 19266, 10426, -25172,    //    w13 w05 w12 w04
 115     19266, -19266, 10426, 25172,    //    w11 w03 w10 w02
 116     -19266, 19266, -25172, -10426,  //    w15 w07 w14 w06
 117     26722, 15137, 22654, -26722,    //    w22 w20 w18 w16
 118     22654, 5315, -5315, -15137,     //    w23 w21 w19 w17
 119     15137, 5315, 5315, 22654,       //    w30 w28 w26 w24
 120     -26722, 22654, -15137, -26722,  //    w31 w29 w27 w25
 121
 122     //row6
 123     21407, 21407, 27969, -11585,    //    w09 w01 w08 w00
 124     21407, 21407, 11585, -27969,    //    w13 w05 w12 w04
 125     21407, -21407, 11585, 27969,    //    w11 w03 w10 w02
 126     -21407, 21407, -27969, -11585,  //    w15 w07 w14 w06,
 127     29692, 16819, 25172, -29692,    //    w22 w20 w18 w16
 128     25172, 5906, -5906, -16819,     //    w23 w21 w19 w17
 129     16819, 5906, 5906, 25172,       //    w30 w28 w26 w24
 130     -29692, 25172, -16819, -29692,  //    w31 w29 w27 w25,
 131
 132     //row7
 133     22725, 22725, 29692, -12299,    //    w09 w01 w08 w00
 134     22725, 22725, 12299, -29692,    //    w13 w05 w12 w04
 135     22725, -22725, 12299, 29692,    //    w11 w03 w10 w02
 136     -22725, 22725, -29692, -12299,  //    w15 w07 w14 w06,
 137     31521, 17855, 26722, -31521,    //    w22 w20 w18 w16
 138     26722, 6270, -6270, -17855,     //    w23 w21 w19 w17
 139     17855, 6270, 6270, 26722,       //    w30 w28 w26 w24
 140     -31521, 26722, -17855, -31521   //    w31 w29 w27 w25
 141 };
 142
 143