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FFmpeg/libavcodec/i386/fdctdata.c

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  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.