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[libav.git] / 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
52const 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
58const long long fdct_one_corr = 0x0001000100010001LL;
59const long fdct_r_row[2] = {RND_FRW_ROW, RND_FRW_ROW };
60
61const 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