|
|
|
@ -28,21 +28,6 @@ |
|
|
|
|
#include "celp_math.h" |
|
|
|
|
#include "libavutil/common.h" |
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Cosine table: base_cos[i] = (1<<15) * cos(i*PI/64) |
|
|
|
|
*/ |
|
|
|
|
static const int16_t tab_cos[65] = |
|
|
|
|
{ |
|
|
|
|
32767, 32738, 32617, 32421, 32145, 31793, 31364, 30860, |
|
|
|
|
30280, 29629, 28905, 28113, 27252, 26326, 25336, 24285, |
|
|
|
|
23176, 22011, 20793, 19525, 18210, 16851, 15451, 14014, |
|
|
|
|
12543, 11043, 9515, 7965, 6395, 4810, 3214, 1609, |
|
|
|
|
1, -1607, -3211, -4808, -6393, -7962, -9513, -11040, |
|
|
|
|
-12541, -14012, -15449, -16848, -18207, -19523, -20791, -22009, |
|
|
|
|
-23174, -24283, -25334, -26324, -27250, -28111, -28904, -29627, |
|
|
|
|
-30279, -30858, -31363, -31792, -32144, -32419, -32616, -32736, -32768, |
|
|
|
|
}; |
|
|
|
|
|
|
|
|
|
static const uint16_t exp2a[]= |
|
|
|
|
{ |
|
|
|
|
0, 1435, 2901, 4400, 5931, 7496, 9096, 10730, |
|
|
|
@ -59,16 +44,6 @@ static const uint16_t exp2b[]= |
|
|
|
|
17176, 17898, 18620, 19343, 20066, 20790, 21514, 22238, |
|
|
|
|
}; |
|
|
|
|
|
|
|
|
|
int16_t ff_cos(uint16_t arg) |
|
|
|
|
{ |
|
|
|
|
uint8_t offset= arg; |
|
|
|
|
uint8_t ind = arg >> 8; |
|
|
|
|
|
|
|
|
|
assert(arg <= 0x3fff); |
|
|
|
|
|
|
|
|
|
return tab_cos[ind] + (offset * (tab_cos[ind+1] - tab_cos[ind]) >> 8); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
int ff_exp2(uint16_t power) |
|
|
|
|
{ |
|
|
|
|
unsigned int result= exp2a[power>>10] + 0x10000; |
|
|
|
|