35 0, 1435, 2901, 4400, 5931, 7496, 9096, 10730,
36 12400, 14106, 15850, 17632, 19454, 21315, 23216, 25160,
37 27146, 29175, 31249, 33368, 35534, 37747, 40009, 42320,
38 44682, 47095, 49562, 52082, 54657, 57289, 59979, 62727,
43 3, 712, 1424, 2134, 2845, 3557, 4270, 4982,
44 5696, 6409, 7124, 7839, 8554, 9270, 9986, 10704,
45 11421, 12138, 12857, 13576, 14295, 15014, 15734, 16455,
46 17176, 17898, 18620, 19343, 20066, 20790, 21514, 22238,
51 unsigned int result=
exp2a[power>>10] + 0x10000;
53 assert(power <= 0x7fff);
55 result= (result<<3) + ((result*exp2b[(power>>5)&31])>>17);
56 return result + ((result*(power&31)*89)>>22);
66 4, 1459, 2870, 4240, 5572, 6867, 8127, 9355,
67 10552, 11719, 12858, 13971, 15057, 16120, 17158, 18175,
68 19170, 20145, 21100, 22036, 22954, 23854, 24738, 25605,
69 26457, 27294, 28116, 28924, 29719, 30500, 31269, 32025, 32769,
80 value <<= (31 - power_int);
83 frac_x0 = (value & 0x7c000000) >> 26;
84 frac_dx = (value & 0x03fff800) >> 11;
89 return (power_int << 15) + value;
97 for (i = 0; i < length; i++)
98 sum +=
MUL16(a[i], b[i]);
int ff_exp2(uint16_t power)
fixed-point implementation of exp2(x) in [0; 1] domain.
static const uint16_t tab_log2[33]
Table used to compute log2(x)
int64_t ff_dot_product(const int16_t *a, const int16_t *b, int length)
Calculate the dot product of 2 int16_t vectors.
int ff_log2_q15(uint32_t value)
Calculate log2(x).
static const uint16_t exp2b[]
Libavcodec external API header.
common internal and external API header
static const uint16_t exp2a[]