本文整理汇总了C++中EXTRACT16函数的典型用法代码示例。如果您正苦于以下问题：C++ EXTRACT16函数的具体用法？C++ EXTRACT16怎么用？C++ EXTRACT16使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了EXTRACT16函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: speex_decode_stereo_int
void speex_decode_stereo_int(spx_int16_t *data, int frame_size, SpeexStereoState *_stereo)
{
int i;
spx_word32_t balance;
spx_word16_t e_left, e_right, e_ratio;
RealSpeexStereoState *stereo = (RealSpeexStereoState*)_stereo;
/* COMPATIBILITY_HACK(stereo); */
balance=stereo->balance;
e_ratio=stereo->e_ratio;
/* These two are Q14, with max value just below 2. */
e_right = DIV32(QCONST32(1., 22), spx_sqrt(MULT16_32_Q15(e_ratio, ADD32(QCONST32(1., 16), balance))));
e_left = SHR32(MULT16_16(spx_sqrt(balance), e_right), 8);
for (i=frame_size-1;i>=0;i--)
{
spx_int16_t tmp=data[i];
stereo->smooth_left = EXTRACT16(PSHR32(MAC16_16(MULT16_16(stereo->smooth_left, QCONST16(0.98, 15)), e_left, QCONST16(0.02, 15)), 15));
stereo->smooth_right = EXTRACT16(PSHR32(MAC16_16(MULT16_16(stereo->smooth_right, QCONST16(0.98, 15)), e_right, QCONST16(0.02, 15)), 15));
data[2*i] = (spx_int16_t)MULT16_16_P14(stereo->smooth_left, tmp);
data[2*i+1] = (spx_int16_t)MULT16_16_P14(stereo->smooth_right, tmp);
}
}示例2: tansig_approx
static inline opus_val16 tansig_approx(opus_val32 _x)
{ /* Q19 */
int i;
opus_val16 xx; /* Q11 */
/*double x, y; */
opus_val16 dy, yy; /* Q14 */
/*x = 1.9073e-06*_x; */
if (_x >= QCONST32(8, 19))
return QCONST32(1., 14);
if (_x <= -QCONST32(8, 19))
return -QCONST32(1., 14);
xx = EXTRACT16(SHR32(_x, 8));
/*i = lrint(25*x); */
i = SHR32(ADD32(1024, MULT16_16(25, xx)), 11);
/*x -= .04*i; */
xx -= EXTRACT16(SHR32(MULT16_16(20972, i), 8));
/*x = xx*(1./2048); */
/*y = tansig_table[250+i]; */
yy = tansig_table[250 + i];
/*y = yy*(1./16384); */
dy = 16384 - MULT16_16_Q14(yy, yy);
yy = yy + MULT16_16_Q14(MULT16_16_Q11(xx, dy),
(16384 - MULT16_16_Q11(yy, xx)));
return yy;
}示例3: exp_rotation1
static void exp_rotation1(celt_norm *X, int len, int stride, opus_val16 c, opus_val16 s)
{
int i;
opus_val16 ms;
celt_norm *Xptr;
Xptr = X;
ms = NEG16(s);
for (i=0; i<len-stride; i++)
{
celt_norm x1, x2;
x1 = Xptr[0];
x2 = Xptr[stride];
Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2), s, x1), 15));
*Xptr++ = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15));
}
Xptr = &X[len-2*stride-1];
for (i=len-2*stride-1; i>=0; i--)
{
celt_norm x1, x2;
x1 = Xptr[0];
x2 = Xptr[stride];
Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2), s, x1), 15));
*Xptr-- = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15));
}
}示例4: mdf_adjust_prop
static inline void mdf_adjust_prop(const spx_word32_t *W, int N, int M, int P, spx_word16_t *prop)
{
int i, j, p;
spx_word16_t max_sum = 1;
spx_word32_t prop_sum = 1;
for (i=0;i<M;i++)
{
spx_word32_t tmp = 1;
for (p=0;p<P;p++)
for (j=0;j<N;j++)
tmp += MULT16_16(EXTRACT16(SHR32(W[p*N*M + i*N+j],18)), EXTRACT16(SHR32(W[p*N*M + i*N+j],18)));
#ifdef FIXED_POINT
/* Just a security in case an overflow were to occur */
tmp = MIN32(ABS32(tmp), 536870912);
#endif
prop[i] = spx_sqrt(tmp);
if (prop[i] > max_sum)
max_sum = prop[i];
}
for (i=0;i<M;i++)
{
prop[i] += MULT16_16_Q15(QCONST16(.1f,15),max_sum);
prop_sum += EXTEND32(prop[i]);
}
for (i=0;i<M;i++)
{
prop[i] = DIV32(MULT16_16(QCONST16(.99f,15), prop[i]),prop_sum);
/*printf ("%f ", prop[i]);*/
}
/*printf ("\n");*/
}示例5: compute_band_energies
/* Compute the amplitude (sqrt energy) in each of the bands */
void compute_band_energies(const CELTMode *m, const celt_sig *X, celt_ener *bandE, int end, int C, int M)
{
int i, c, N;
const opus_int16 *eBands = m->eBands;
N = M*m->shortMdctSize;
c=0; do {
for (i=0;i<end;i++)
{
int j;
opus_val32 maxval=0;
opus_val32 sum = 0;
j=M*eBands[i]; do {
maxval = MAX32(maxval, X[j+c*N]);
maxval = MAX32(maxval, -X[j+c*N]);
} while (++j<M*eBands[i+1]);
if (maxval > 0)
{
int shift = celt_ilog2(maxval)-10;
j=M*eBands[i]; do {
sum = MAC16_16(sum, EXTRACT16(VSHR32(X[j+c*N],shift)),
EXTRACT16(VSHR32(X[j+c*N],shift)));
} while (++j<M*eBands[i+1]);
/* We're adding one here to make damn sure we never end up with a pitch vector that's
larger than unity norm */
bandE[i+c*m->nbEBands] = EPSILON+VSHR32(EXTEND32(celt_sqrt(sum)),-shift);
} else {
bandE[i+c*m->nbEBands] = EPSILON;
}
/*printf ("%f ", bandE[i+c*m->nbEBands]);*/
}
} while (++c<C);
/*printf ("\n");*/
}示例6: forced_pitch_quant
/** Forced pitch delay and gain */
int forced_pitch_quant(spx_word16_t target[], /* Target vector */
spx_word16_t * sw, spx_coef_t ak[], /* LPCs for this subframe */
spx_coef_t awk1[], /* Weighted LPCs #1 for this subframe */
spx_coef_t awk2[], /* Weighted LPCs #2 for this subframe */
spx_sig_t exc[], /* Excitation */
const void *par, int start, /* Smallest pitch value allowed */
int end, /* Largest pitch value allowed */
spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */
int p, /* Number of LPC coeffs */
int nsf, /* Number of samples in subframe */
SpeexBits * bits,
char *stack,
spx_word16_t * exc2,
spx_word16_t * r,
int complexity,
int cdbk_offset,
int plc_tuning, spx_word32_t * cumul_gain)
{
(void)sw;
(void)par;
(void)end;
(void)bits;
(void)r;
(void)complexity;
(void)cdbk_offset;
(void)plc_tuning;
(void)cumul_gain;
int i;
spx_word16_t res[nsf];
#ifdef FIXED_POINT
if (pitch_coef > 63)
pitch_coef = 63;
#else
if (pitch_coef > .99)
pitch_coef = .99;
#endif
for (i = 0; i < nsf && i < start; i++) {
exc[i] = MULT16_16(SHL16(pitch_coef, 7), exc2[i - start]);
}
for (; i < nsf; i++) {
exc[i] = MULT16_32_Q15(SHL16(pitch_coef, 9), exc[i - start]);
}
for (i = 0; i < nsf; i++)
res[i] = EXTRACT16(PSHR32(exc[i], SIG_SHIFT - 1));
syn_percep_zero16(res, ak, awk1, awk2, res, nsf, p, stack);
for (i = 0; i < nsf; i++)
target[i] =
EXTRACT16(SATURATE
(SUB32(EXTEND32(target[i]), EXTEND32(res[i])),
32700));
return start;
}示例7: speex_rand
spx_word32_t speex_rand(spx_word16_t std, spx_int32_t *seed)
{
spx_word32_t res;
*seed = 1664525 * *seed + 1013904223;
res = MULT16_16(EXTRACT16(SHR32(*seed,16)),std);
return SUB32(res, SHR(res, 3));
}示例8: compute_weighted_codebook
static void compute_weighted_codebook(const signed char *shape_cb, const spx_word16_t *r, spx_word16_t *resp, spx_word16_t *resp2, spx_word32_t *E, int shape_cb_size, int subvect_size, char *stack)
{
int i, j, k;
VARDECL(spx_word16_t *shape);
ALLOC(shape, subvect_size, spx_word16_t);
for (i=0;i<shape_cb_size;i++)
{
spx_word16_t *res;
res = resp+i*subvect_size;
for (k=0;k<subvect_size;k++)
shape[k] = (spx_word16_t)shape_cb[i*subvect_size+k];
E[i]=0;
/* Compute codeword response using convolution with impulse response */
for(j=0;j<subvect_size;j++)
{
spx_word32_t resj=0;
spx_word16_t res16;
for (k=0;k<=j;k++)
resj = MAC16_16(resj,shape[k],r[j-k]);
#ifdef FIXED_POINT
res16 = EXTRACT16(SHR32(resj, 13));
#else
res16 = 0.03125f*resj;
#endif
/* Compute codeword energy */
E[i]=MAC16_16(E[i],res16,res16);
res[j] = res16;
/*printf ("%d\n", (int)res[j]);*/
}
}
}示例9: find_best_pitch
static void find_best_pitch(opus_val32 *xcorr, opus_val16 *y, int len,
int max_pitch, int *best_pitch
#ifdef FIXED_POINT
, int yshift, opus_val32 maxcorr
#endif
)
{
int i, j;
opus_val32 Syy=1;
opus_val16 best_num[2];
opus_val32 best_den[2];
#ifdef FIXED_POINT
int xshift;
xshift = celt_ilog2(maxcorr)-14;
#endif
best_num[0] = -1;
best_num[1] = -1;
best_den[0] = 0;
best_den[1] = 0;
best_pitch[0] = 0;
best_pitch[1] = 1;
for (j=0;j<len;j++)
Syy = ADD32(Syy, SHR32(MULT16_16(y[j],y[j]), yshift));
for (i=0;i<max_pitch;i++)
{
if (xcorr[i]>0)
{
opus_val16 num;
opus_val32 xcorr16;
xcorr16 = EXTRACT16(VSHR32(xcorr[i], xshift));
#ifndef FIXED_POINT
/* Considering the range of xcorr16, this should avoid both underflows
and overflows (inf) when squaring xcorr16 */
xcorr16 *= 1e-12f;
#endif
num = MULT16_16_Q15(xcorr16,xcorr16);
if (MULT16_32_Q15(num,best_den[1]) > MULT16_32_Q15(best_num[1],Syy))
{
if (MULT16_32_Q15(num,best_den[0]) > MULT16_32_Q15(best_num[0],Syy))
{
best_num[1] = best_num[0];
best_den[1] = best_den[0];
best_pitch[1] = best_pitch[0];
best_num[0] = num;
best_den[0] = Syy;
best_pitch[0] = i;
} else {
best_num[1] = num;
best_den[1] = Syy;
best_pitch[1] = i;
}
}
}
Syy += SHR32(MULT16_16(y[i+len],y[i+len]),yshift) - SHR32(MULT16_16(y[i],y[i]),yshift);
Syy = MAX32(1, Syy);
}
}示例10: speex_echo_ctl
EXPORT int speex_echo_ctl(SpeexEchoState *st, int request, void *ptr)
{
switch(request)
{
case SPEEX_ECHO_GET_FRAME_SIZE:
(*(int*)ptr) = st->frame_size;
break;
case SPEEX_ECHO_SET_SAMPLING_RATE:
st->sampling_rate = (*(int*)ptr);
st->spec_average = DIV32_16(SHL32(EXTEND32(st->frame_size), 15), st->sampling_rate);
#ifdef FIXED_POINT
st->beta0 = DIV32_16(SHL32(EXTEND32(st->frame_size), 16), st->sampling_rate);
st->beta_max = DIV32_16(SHL32(EXTEND32(st->frame_size), 14), st->sampling_rate);
#else
st->beta0 = (2.0f*st->frame_size)/st->sampling_rate;
st->beta_max = (.5f*st->frame_size)/st->sampling_rate;
#endif
if (st->sampling_rate<12000)
st->notch_radius = QCONST16(.9, 15);
else if (st->sampling_rate<24000)
st->notch_radius = QCONST16(.982, 15);
else
st->notch_radius = QCONST16(.992, 15);
break;
case SPEEX_ECHO_GET_SAMPLING_RATE:
(*(int*)ptr) = st->sampling_rate;
break;
case SPEEX_ECHO_GET_IMPULSE_RESPONSE_SIZE:
/*FIXME: Implement this for multiple channels */
*((spx_int32_t *)ptr) = st->M * st->frame_size;
break;
case SPEEX_ECHO_GET_IMPULSE_RESPONSE:
{
int M = st->M, N = st->window_size, n = st->frame_size, i, j;
spx_int32_t *filt = (spx_int32_t *) ptr;
for(j=0;j<M;j++)
{
/*FIXME: Implement this for multiple channels */
#ifdef FIXED_POINT
for (i=0;i<N;i++)
st->wtmp2[i] = EXTRACT16(PSHR32(st->W[j*N+i],16+NORMALIZE_SCALEDOWN));
spx_ifft(st->fft_table, st->wtmp2, st->wtmp);
#else
spx_ifft(st->fft_table, &st->W[j*N], st->wtmp);
#endif
for(i=0;i<n;i++)
filt[j*n+i] = PSHR32(MULT16_16(32767,st->wtmp[i]), WEIGHT_SHIFT-NORMALIZE_SCALEDOWN);
}
}
break;
default:
speex_warning_int("Unknown speex_echo_ctl request: ", request);
return -1;
}
return 0;
}示例11: SIG2WORD16
static __inline celt_word16_t SIG2WORD16(celt_sig_t x)
{
#ifdef FIXED_POINT
x = PSHR32(x, SIG_SHIFT);
x = MAX32(x, -32768);
x = MIN32(x, 32767);
return EXTRACT16(x);
#else
return (celt_word16_t)x;
#endif
}示例12: find_best_pitch
static void find_best_pitch(opus_val32 *xcorr, opus_val16 *y, int len,
int max_pitch, int *best_pitch
#ifdef FIXED_POINT
, int yshift, opus_val32 maxcorr
#endif
)
{
int i, j;
opus_val32 Syy=1;
opus_val16 best_num[2];
opus_val32 best_den[2];
#ifdef FIXED_POINT
int xshift;
xshift = celt_ilog2(maxcorr)-14;
#endif
best_num[0] = -1;
best_num[1] = -1;
best_den[0] = 0;
best_den[1] = 0;
best_pitch[0] = 0;
best_pitch[1] = 1;
for (j=0;j<len;j++)
Syy = MAC16_16(Syy, y[j],y[j]);
for (i=0;i<max_pitch;i++)
{
if (xcorr[i]>0)
{
opus_val16 num;
opus_val32 xcorr16;
xcorr16 = EXTRACT16(VSHR32(xcorr[i], xshift));
num = MULT16_16_Q15(xcorr16,xcorr16);
if (MULT16_32_Q15(num,best_den[1]) > MULT16_32_Q15(best_num[1],Syy))
{
if (MULT16_32_Q15(num,best_den[0]) > MULT16_32_Q15(best_num[0],Syy))
{
best_num[1] = best_num[0];
best_den[1] = best_den[0];
best_pitch[1] = best_pitch[0];
best_num[0] = num;
best_den[0] = Syy;
best_pitch[0] = i;
} else {
best_num[1] = num;
best_den[1] = Syy;
best_pitch[1] = i;
}
}
}
Syy += SHR32(MULT16_16(y[i+len],y[i+len]),yshift) - SHR32(MULT16_16(y[i],y[i]),yshift);
Syy = MAX32(1, Syy);
}
}示例13: SIG2WORD16
static inline opus_val16 SIG2WORD16(celt_sig x)
{
#ifdef FIXED_POINT
x = PSHR32(x, SIG_SHIFT);
x = MAX32(x, -32768);
x = MIN32(x, 32767);
return EXTRACT16(x);
#else
return (opus_val16)x;
#endif
}示例14: filterbank_compute_psd16
void filterbank_compute_psd16(FilterBank *bank, spx_word16_t *mel, spx_word16_t *ps)
{
int i;
for (i=0;i<bank->len;i++)
{
spx_word32_t tmp;
int id1, id2;
id1 = bank->bank_left[i];
id2 = bank->bank_right[i];
tmp = MULT16_16(mel[id1],bank->filter_left[i]);
tmp += MULT16_16(mel[id2],bank->filter_right[i]);
ps[i] = EXTRACT16(PSHR32(tmp,15));
}
}示例15: compute_band_energies
/* Compute the amplitude (sqrt energy) in each of the bands */
void compute_band_energies(const CELTMode *m, const celt_sig *X, celt_ener *bank, int _C)
{
int i, c, N;
const celt_int16 *eBands = m->eBands;
const int C = CHANNELS(_C);
N = FRAMESIZE(m);
for (c=0;c<C;c++)
{
for (i=0;i<m->nbEBands;i++)
{
int j;
celt_word32 maxval=0;
celt_word32 sum = 0;
j=eBands[i]; do {
maxval = MAX32(maxval, X[j+c*N]);
maxval = MAX32(maxval, -X[j+c*N]);
} while (++j<eBands[i+1]);
if (maxval > 0)
{
int shift = celt_ilog2(maxval)-10;
j=eBands[i]; do {
sum = MAC16_16(sum, EXTRACT16(VSHR32(X[j+c*N],shift)),
EXTRACT16(VSHR32(X[j+c*N],shift)));
} while (++j<eBands[i+1]);
/* We're adding one here to make damn sure we never end up with a pitch vector that's
larger than unity norm */
bank[i+c*m->nbEBands] = EPSILON+VSHR32(EXTEND32(celt_sqrt(sum)),-shift);
} else {
bank[i+c*m->nbEBands] = EPSILON;
}
/*printf ("%f ", bank[i+c*m->nbEBands]);*/
}
}
/*printf ("\n");*/
}