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Diffstat (limited to 'libavcodec/i386/fdctdata.c')
| -rw-r--r-- | libavcodec/i386/fdctdata.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/libavcodec/i386/fdctdata.c b/libavcodec/i386/fdctdata.c new file mode 100644 index 0000000000..e095d0f4e4 --- /dev/null +++ b/libavcodec/i386/fdctdata.c @@ -0,0 +1,143 @@ +////////////////////////////////////////////////////////////////////////////// +// +// fdctam32.c - AP922 MMX(3D-Now) forward-DCT +// ---------- +// Intel Application Note AP-922 - fast, precise implementation of DCT +// http://developer.intel.com/vtune/cbts/appnotes.htm +// ---------- +// +// This routine uses a 3D-Now/MMX enhancement to increase the +// accuracy of the fdct_col_4 macro. The dct_col function uses 3D-Now's +// PMHULHRW instead of MMX's PMHULHW(and POR). The substitution improves +// accuracy very slightly with performance penalty. If the target CPU +// does not support 3D-Now, then this function cannot be executed. +// fdctmm32.c contains the standard MMX implementation of AP-922. +// +// For a fast, precise MMX implementation of inverse-DCT +// visit http://www.elecard.com/peter +// +// v1.0 07/22/2000 (initial release) +// Initial release of AP922 MMX(3D-Now) forward_DCT. +// This code was tested with Visual C++ 6.0Pro + service_pack4 + +// processor_pack_beta! If you have the processor_pack_beta, you can +// remove the #include for amd3dx.h, and substitute the 'normal' +// assembly lines for the macro'd versions. Otherwise, this +// code should compile 'as is', under Visual C++ 6.0 Pro. +// +// liaor@iname.com http://members.tripod.com/~liaor +////////////////////////////////////////////////////////////////////////////// + +#include <inttypes.h> + +////////////////////////////////////////////////////////////////////// +// +// constants for the forward DCT +// ----------------------------- +// +// Be sure to check that your compiler is aligning all constants to QWORD +// (8-byte) memory boundaries! Otherwise the unaligned memory access will +// severely stall MMX execution. +// +////////////////////////////////////////////////////////////////////// + +#define BITS_FRW_ACC 3 //; 2 or 3 for accuracy +#define SHIFT_FRW_COL BITS_FRW_ACC +#define SHIFT_FRW_ROW (BITS_FRW_ACC + 17) +//#define RND_FRW_ROW (262144 * (BITS_FRW_ACC - 1)) //; 1 << (SHIFT_FRW_ROW-1) +#define RND_FRW_ROW (1 << (SHIFT_FRW_ROW-1)) +//#define RND_FRW_COL (2 * (BITS_FRW_ACC - 1)) //; 1 << (SHIFT_FRW_COL-1) +#define RND_FRW_COL (1 << (SHIFT_FRW_COL-1)) + +//concatenated table, for forward DCT transformation +const int16_t fdct_tg_all_16[] = { + 13036, 13036, 13036, 13036, // tg * (2<<16) + 0.5 + 27146, 27146, 27146, 27146, // tg * (2<<16) + 0.5 + -21746, -21746, -21746, -21746, // tg * (2<<16) + 0.5 + -19195, -19195, -19195, -19195, //cos * (2<<16) + 0.5 + 23170, 23170, 23170, 23170 }; //cos * (2<<15) + 0.5 +const long long fdct_one_corr = 0x0001000100010001LL; +const long fdct_r_row[2] = {RND_FRW_ROW, RND_FRW_ROW }; + +const int16_t tab_frw_01234567[] = { // forward_dct coeff table + //row0 + 16384, 16384, 21407, -8867, // w09 w01 w08 w00 + 16384, 16384, 8867, -21407, // w13 w05 w12 w04 + 16384, -16384, 8867, 21407, // w11 w03 w10 w02 + -16384, 16384, -21407, -8867, // w15 w07 w14 w06 + 22725, 12873, 19266, -22725, // w22 w20 w18 w16 + 19266, 4520, -4520, -12873, // w23 w21 w19 w17 + 12873, 4520, 4520, 19266, // w30 w28 w26 w24 + -22725, 19266, -12873, -22725, // w31 w29 w27 w25 + + //row1 + 22725, 22725, 29692, -12299, // w09 w01 w08 w00 + 22725, 22725, 12299, -29692, // w13 w05 w12 w04 + 22725, -22725, 12299, 29692, // w11 w03 w10 w02 + -22725, 22725, -29692, -12299, // w15 w07 w14 w06 + 31521, 17855, 26722, -31521, // w22 w20 w18 w16 + 26722, 6270, -6270, -17855, // w23 w21 w19 w17 + 17855, 6270, 6270, 26722, // w30 w28 w26 w24 + -31521, 26722, -17855, -31521, // w31 w29 w27 w25 + + //row2 + 21407, 21407, 27969, -11585, // w09 w01 w08 w00 + 21407, 21407, 11585, -27969, // w13 w05 w12 w04 + 21407, -21407, 11585, 27969, // w11 w03 w10 w02 + -21407, 21407, -27969, -11585, // w15 w07 w14 w06 + 29692, 16819, 25172, -29692, // w22 w20 w18 w16 + 25172, 5906, -5906, -16819, // w23 w21 w19 w17 + 16819, 5906, 5906, 25172, // w30 w28 w26 w24 + -29692, 25172, -16819, -29692, // w31 w29 w27 w25 + + //row3 + 19266, 19266, 25172, -10426, // w09 w01 w08 w00 + 19266, 19266, 10426, -25172, // w13 w05 w12 w04 + 19266, -19266, 10426, 25172, // w11 w03 w10 w02 + -19266, 19266, -25172, -10426, // w15 w07 w14 w06, + 26722, 15137, 22654, -26722, // w22 w20 w18 w16 + 22654, 5315, -5315, -15137, // w23 w21 w19 w17 + 15137, 5315, 5315, 22654, // w30 w28 w26 w24 + -26722, 22654, -15137, -26722, // w31 w29 w27 w25, + + //row4 + 16384, 16384, 21407, -8867, // w09 w01 w08 w00 + 16384, 16384, 8867, -21407, // w13 w05 w12 w04 + 16384, -16384, 8867, 21407, // w11 w03 w10 w02 + -16384, 16384, -21407, -8867, // w15 w07 w14 w06 + 22725, 12873, 19266, -22725, // w22 w20 w18 w16 + 19266, 4520, -4520, -12873, // w23 w21 w19 w17 + 12873, 4520, 4520, 19266, // w30 w28 w26 w24 + -22725, 19266, -12873, -22725, // w31 w29 w27 w25 + + //row5 + 19266, 19266, 25172, -10426, // w09 w01 w08 w00 + 19266, 19266, 10426, -25172, // w13 w05 w12 w04 + 19266, -19266, 10426, 25172, // w11 w03 w10 w02 + -19266, 19266, -25172, -10426, // w15 w07 w14 w06 + 26722, 15137, 22654, -26722, // w22 w20 w18 w16 + 22654, 5315, -5315, -15137, // w23 w21 w19 w17 + 15137, 5315, 5315, 22654, // w30 w28 w26 w24 + -26722, 22654, -15137, -26722, // w31 w29 w27 w25 + + //row6 + 21407, 21407, 27969, -11585, // w09 w01 w08 w00 + 21407, 21407, 11585, -27969, // w13 w05 w12 w04 + 21407, -21407, 11585, 27969, // w11 w03 w10 w02 + -21407, 21407, -27969, -11585, // w15 w07 w14 w06, + 29692, 16819, 25172, -29692, // w22 w20 w18 w16 + 25172, 5906, -5906, -16819, // w23 w21 w19 w17 + 16819, 5906, 5906, 25172, // w30 w28 w26 w24 + -29692, 25172, -16819, -29692, // w31 w29 w27 w25, + + //row7 + 22725, 22725, 29692, -12299, // w09 w01 w08 w00 + 22725, 22725, 12299, -29692, // w13 w05 w12 w04 + 22725, -22725, 12299, 29692, // w11 w03 w10 w02 + -22725, 22725, -29692, -12299, // w15 w07 w14 w06, + 31521, 17855, 26722, -31521, // w22 w20 w18 w16 + 26722, 6270, -6270, -17855, // w23 w21 w19 w17 + 17855, 6270, 6270, 26722, // w30 w28 w26 w24 + -31521, 26722, -17855, -31521 // w31 w29 w27 w25 +}; + + |