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-rw-r--r--thirdparty/opus/celt/pitch.c557
1 files changed, 0 insertions, 557 deletions
diff --git a/thirdparty/opus/celt/pitch.c b/thirdparty/opus/celt/pitch.c
deleted file mode 100644
index bf46e7d562..0000000000
--- a/thirdparty/opus/celt/pitch.c
+++ /dev/null
@@ -1,557 +0,0 @@
-/* Copyright (c) 2007-2008 CSIRO
- Copyright (c) 2007-2009 Xiph.Org Foundation
- Written by Jean-Marc Valin */
-/**
- @file pitch.c
- @brief Pitch analysis
- */
-
-/*
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
-
- - Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-
- - Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "pitch.h"
-#include "os_support.h"
-#include "modes.h"
-#include "stack_alloc.h"
-#include "mathops.h"
-#include "celt_lpc.h"
-
-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);
- }
-}
-
-static void celt_fir5(const opus_val16 *x,
- const opus_val16 *num,
- opus_val16 *y,
- int N,
- opus_val16 *mem)
-{
- int i;
- opus_val16 num0, num1, num2, num3, num4;
- opus_val32 mem0, mem1, mem2, mem3, mem4;
- num0=num[0];
- num1=num[1];
- num2=num[2];
- num3=num[3];
- num4=num[4];
- mem0=mem[0];
- mem1=mem[1];
- mem2=mem[2];
- mem3=mem[3];
- mem4=mem[4];
- for (i=0;i<N;i++)
- {
- opus_val32 sum = SHL32(EXTEND32(x[i]), SIG_SHIFT);
- sum = MAC16_16(sum,num0,mem0);
- sum = MAC16_16(sum,num1,mem1);
- sum = MAC16_16(sum,num2,mem2);
- sum = MAC16_16(sum,num3,mem3);
- sum = MAC16_16(sum,num4,mem4);
- mem4 = mem3;
- mem3 = mem2;
- mem2 = mem1;
- mem1 = mem0;
- mem0 = x[i];
- y[i] = ROUND16(sum, SIG_SHIFT);
- }
- mem[0]=mem0;
- mem[1]=mem1;
- mem[2]=mem2;
- mem[3]=mem3;
- mem[4]=mem4;
-}
-
-
-void pitch_downsample(celt_sig * OPUS_RESTRICT x[], opus_val16 * OPUS_RESTRICT x_lp,
- int len, int C, int arch)
-{
- int i;
- opus_val32 ac[5];
- opus_val16 tmp=Q15ONE;
- opus_val16 lpc[4], mem[5]={0,0,0,0,0};
- opus_val16 lpc2[5];
- opus_val16 c1 = QCONST16(.8f,15);
-#ifdef FIXED_POINT
- int shift;
- opus_val32 maxabs = celt_maxabs32(x[0], len);
- if (C==2)
- {
- opus_val32 maxabs_1 = celt_maxabs32(x[1], len);
- maxabs = MAX32(maxabs, maxabs_1);
- }
- if (maxabs<1)
- maxabs=1;
- shift = celt_ilog2(maxabs)-10;
- if (shift<0)
- shift=0;
- if (C==2)
- shift++;
-#endif
- for (i=1;i<len>>1;i++)
- x_lp[i] = SHR32(HALF32(HALF32(x[0][(2*i-1)]+x[0][(2*i+1)])+x[0][2*i]), shift);
- x_lp[0] = SHR32(HALF32(HALF32(x[0][1])+x[0][0]), shift);
- if (C==2)
- {
- for (i=1;i<len>>1;i++)
- x_lp[i] += SHR32(HALF32(HALF32(x[1][(2*i-1)]+x[1][(2*i+1)])+x[1][2*i]), shift);
- x_lp[0] += SHR32(HALF32(HALF32(x[1][1])+x[1][0]), shift);
- }
-
- _celt_autocorr(x_lp, ac, NULL, 0,
- 4, len>>1, arch);
-
- /* Noise floor -40 dB */
-#ifdef FIXED_POINT
- ac[0] += SHR32(ac[0],13);
-#else
- ac[0] *= 1.0001f;
-#endif
- /* Lag windowing */
- for (i=1;i<=4;i++)
- {
- /*ac[i] *= exp(-.5*(2*M_PI*.002*i)*(2*M_PI*.002*i));*/
-#ifdef FIXED_POINT
- ac[i] -= MULT16_32_Q15(2*i*i, ac[i]);
-#else
- ac[i] -= ac[i]*(.008f*i)*(.008f*i);
-#endif
- }
-
- _celt_lpc(lpc, ac, 4);
- for (i=0;i<4;i++)
- {
- tmp = MULT16_16_Q15(QCONST16(.9f,15), tmp);
- lpc[i] = MULT16_16_Q15(lpc[i], tmp);
- }
- /* Add a zero */
- lpc2[0] = lpc[0] + QCONST16(.8f,SIG_SHIFT);
- lpc2[1] = lpc[1] + MULT16_16_Q15(c1,lpc[0]);
- lpc2[2] = lpc[2] + MULT16_16_Q15(c1,lpc[1]);
- lpc2[3] = lpc[3] + MULT16_16_Q15(c1,lpc[2]);
- lpc2[4] = MULT16_16_Q15(c1,lpc[3]);
- celt_fir5(x_lp, lpc2, x_lp, len>>1, mem);
-}
-
-/* Pure C implementation. */
-#ifdef FIXED_POINT
-opus_val32
-#else
-void
-#endif
-#if defined(OVERRIDE_PITCH_XCORR)
-celt_pitch_xcorr_c(const opus_val16 *_x, const opus_val16 *_y,
- opus_val32 *xcorr, int len, int max_pitch)
-#else
-celt_pitch_xcorr(const opus_val16 *_x, const opus_val16 *_y,
- opus_val32 *xcorr, int len, int max_pitch, int arch)
-#endif
-{
-
-#if 0 /* This is a simple version of the pitch correlation that should work
- well on DSPs like Blackfin and TI C5x/C6x */
- int i, j;
-#ifdef FIXED_POINT
- opus_val32 maxcorr=1;
-#endif
-#if !defined(OVERRIDE_PITCH_XCORR)
- (void)arch;
-#endif
- for (i=0;i<max_pitch;i++)
- {
- opus_val32 sum = 0;
- for (j=0;j<len;j++)
- sum = MAC16_16(sum, _x[j], _y[i+j]);
- xcorr[i] = sum;
-#ifdef FIXED_POINT
- maxcorr = MAX32(maxcorr, sum);
-#endif
- }
-#ifdef FIXED_POINT
- return maxcorr;
-#endif
-
-#else /* Unrolled version of the pitch correlation -- runs faster on x86 and ARM */
- int i;
- /*The EDSP version requires that max_pitch is at least 1, and that _x is
- 32-bit aligned.
- Since it's hard to put asserts in assembly, put them here.*/
-#ifdef FIXED_POINT
- opus_val32 maxcorr=1;
-#endif
- celt_assert(max_pitch>0);
- celt_assert((((unsigned char *)_x-(unsigned char *)NULL)&3)==0);
- for (i=0;i<max_pitch-3;i+=4)
- {
- opus_val32 sum[4]={0,0,0,0};
-#if defined(OVERRIDE_PITCH_XCORR)
- xcorr_kernel_c(_x, _y+i, sum, len);
-#else
- xcorr_kernel(_x, _y+i, sum, len, arch);
-#endif
- xcorr[i]=sum[0];
- xcorr[i+1]=sum[1];
- xcorr[i+2]=sum[2];
- xcorr[i+3]=sum[3];
-#ifdef FIXED_POINT
- sum[0] = MAX32(sum[0], sum[1]);
- sum[2] = MAX32(sum[2], sum[3]);
- sum[0] = MAX32(sum[0], sum[2]);
- maxcorr = MAX32(maxcorr, sum[0]);
-#endif
- }
- /* In case max_pitch isn't a multiple of 4, do non-unrolled version. */
- for (;i<max_pitch;i++)
- {
- opus_val32 sum;
-#if defined(OVERRIDE_PITCH_XCORR)
- sum = celt_inner_prod_c(_x, _y+i, len);
-#else
- sum = celt_inner_prod(_x, _y+i, len, arch);
-#endif
- xcorr[i] = sum;
-#ifdef FIXED_POINT
- maxcorr = MAX32(maxcorr, sum);
-#endif
- }
-#ifdef FIXED_POINT
- return maxcorr;
-#endif
-#endif
-}
-
-void pitch_search(const opus_val16 * OPUS_RESTRICT x_lp, opus_val16 * OPUS_RESTRICT y,
- int len, int max_pitch, int *pitch, int arch)
-{
- int i, j;
- int lag;
- int best_pitch[2]={0,0};
- VARDECL(opus_val16, x_lp4);
- VARDECL(opus_val16, y_lp4);
- VARDECL(opus_val32, xcorr);
-#ifdef FIXED_POINT
- opus_val32 maxcorr;
- opus_val32 xmax, ymax;
- int shift=0;
-#endif
- int offset;
-
- SAVE_STACK;
-
- celt_assert(len>0);
- celt_assert(max_pitch>0);
- lag = len+max_pitch;
-
- ALLOC(x_lp4, len>>2, opus_val16);
- ALLOC(y_lp4, lag>>2, opus_val16);
- ALLOC(xcorr, max_pitch>>1, opus_val32);
-
- /* Downsample by 2 again */
- for (j=0;j<len>>2;j++)
- x_lp4[j] = x_lp[2*j];
- for (j=0;j<lag>>2;j++)
- y_lp4[j] = y[2*j];
-
-#ifdef FIXED_POINT
- xmax = celt_maxabs16(x_lp4, len>>2);
- ymax = celt_maxabs16(y_lp4, lag>>2);
- shift = celt_ilog2(MAX32(1, MAX32(xmax, ymax)))-11;
- if (shift>0)
- {
- for (j=0;j<len>>2;j++)
- x_lp4[j] = SHR16(x_lp4[j], shift);
- for (j=0;j<lag>>2;j++)
- y_lp4[j] = SHR16(y_lp4[j], shift);
- /* Use double the shift for a MAC */
- shift *= 2;
- } else {
- shift = 0;
- }
-#endif
-
- /* Coarse search with 4x decimation */
-
-#ifdef FIXED_POINT
- maxcorr =
-#endif
- celt_pitch_xcorr(x_lp4, y_lp4, xcorr, len>>2, max_pitch>>2, arch);
-
- find_best_pitch(xcorr, y_lp4, len>>2, max_pitch>>2, best_pitch
-#ifdef FIXED_POINT
- , 0, maxcorr
-#endif
- );
-
- /* Finer search with 2x decimation */
-#ifdef FIXED_POINT
- maxcorr=1;
-#endif
- for (i=0;i<max_pitch>>1;i++)
- {
- opus_val32 sum;
- xcorr[i] = 0;
- if (abs(i-2*best_pitch[0])>2 && abs(i-2*best_pitch[1])>2)
- continue;
-#ifdef FIXED_POINT
- sum = 0;
- for (j=0;j<len>>1;j++)
- sum += SHR32(MULT16_16(x_lp[j],y[i+j]), shift);
-#else
- sum = celt_inner_prod_c(x_lp, y+i, len>>1);
-#endif
- xcorr[i] = MAX32(-1, sum);
-#ifdef FIXED_POINT
- maxcorr = MAX32(maxcorr, sum);
-#endif
- }
- find_best_pitch(xcorr, y, len>>1, max_pitch>>1, best_pitch
-#ifdef FIXED_POINT
- , shift+1, maxcorr
-#endif
- );
-
- /* Refine by pseudo-interpolation */
- if (best_pitch[0]>0 && best_pitch[0]<(max_pitch>>1)-1)
- {
- opus_val32 a, b, c;
- a = xcorr[best_pitch[0]-1];
- b = xcorr[best_pitch[0]];
- c = xcorr[best_pitch[0]+1];
- if ((c-a) > MULT16_32_Q15(QCONST16(.7f,15),b-a))
- offset = 1;
- else if ((a-c) > MULT16_32_Q15(QCONST16(.7f,15),b-c))
- offset = -1;
- else
- offset = 0;
- } else {
- offset = 0;
- }
- *pitch = 2*best_pitch[0]-offset;
-
- RESTORE_STACK;
-}
-
-#ifdef FIXED_POINT
-static opus_val16 compute_pitch_gain(opus_val32 xy, opus_val32 xx, opus_val32 yy)
-{
- opus_val32 x2y2;
- int sx, sy, shift;
- opus_val32 g;
- opus_val16 den;
- if (xy == 0 || xx == 0 || yy == 0)
- return 0;
- sx = celt_ilog2(xx)-14;
- sy = celt_ilog2(yy)-14;
- shift = sx + sy;
- x2y2 = MULT16_16_Q14(VSHR32(xx, sx), VSHR32(yy, sy));
- if (shift & 1) {
- if (x2y2 < 32768)
- {
- x2y2 <<= 1;
- shift--;
- } else {
- x2y2 >>= 1;
- shift++;
- }
- }
- den = celt_rsqrt_norm(x2y2);
- g = MULT16_32_Q15(den, xy);
- g = VSHR32(g, (shift>>1)-1);
- return EXTRACT16(MIN32(g, Q15ONE));
-}
-#else
-static opus_val16 compute_pitch_gain(opus_val32 xy, opus_val32 xx, opus_val32 yy)
-{
- return xy/celt_sqrt(1+xx*yy);
-}
-#endif
-
-static const int second_check[16] = {0, 0, 3, 2, 3, 2, 5, 2, 3, 2, 3, 2, 5, 2, 3, 2};
-opus_val16 remove_doubling(opus_val16 *x, int maxperiod, int minperiod,
- int N, int *T0_, int prev_period, opus_val16 prev_gain, int arch)
-{
- int k, i, T, T0;
- opus_val16 g, g0;
- opus_val16 pg;
- opus_val32 xy,xx,yy,xy2;
- opus_val32 xcorr[3];
- opus_val32 best_xy, best_yy;
- int offset;
- int minperiod0;
- VARDECL(opus_val32, yy_lookup);
- SAVE_STACK;
-
- minperiod0 = minperiod;
- maxperiod /= 2;
- minperiod /= 2;
- *T0_ /= 2;
- prev_period /= 2;
- N /= 2;
- x += maxperiod;
- if (*T0_>=maxperiod)
- *T0_=maxperiod-1;
-
- T = T0 = *T0_;
- ALLOC(yy_lookup, maxperiod+1, opus_val32);
- dual_inner_prod(x, x, x-T0, N, &xx, &xy, arch);
- yy_lookup[0] = xx;
- yy=xx;
- for (i=1;i<=maxperiod;i++)
- {
- yy = yy+MULT16_16(x[-i],x[-i])-MULT16_16(x[N-i],x[N-i]);
- yy_lookup[i] = MAX32(0, yy);
- }
- yy = yy_lookup[T0];
- best_xy = xy;
- best_yy = yy;
- g = g0 = compute_pitch_gain(xy, xx, yy);
- /* Look for any pitch at T/k */
- for (k=2;k<=15;k++)
- {
- int T1, T1b;
- opus_val16 g1;
- opus_val16 cont=0;
- opus_val16 thresh;
- T1 = celt_udiv(2*T0+k, 2*k);
- if (T1 < minperiod)
- break;
- /* Look for another strong correlation at T1b */
- if (k==2)
- {
- if (T1+T0>maxperiod)
- T1b = T0;
- else
- T1b = T0+T1;
- } else
- {
- T1b = celt_udiv(2*second_check[k]*T0+k, 2*k);
- }
- dual_inner_prod(x, &x[-T1], &x[-T1b], N, &xy, &xy2, arch);
- xy = HALF32(xy + xy2);
- yy = HALF32(yy_lookup[T1] + yy_lookup[T1b]);
- g1 = compute_pitch_gain(xy, xx, yy);
- if (abs(T1-prev_period)<=1)
- cont = prev_gain;
- else if (abs(T1-prev_period)<=2 && 5*k*k < T0)
- cont = HALF16(prev_gain);
- else
- cont = 0;
- thresh = MAX16(QCONST16(.3f,15), MULT16_16_Q15(QCONST16(.7f,15),g0)-cont);
- /* Bias against very high pitch (very short period) to avoid false-positives
- due to short-term correlation */
- if (T1<3*minperiod)
- thresh = MAX16(QCONST16(.4f,15), MULT16_16_Q15(QCONST16(.85f,15),g0)-cont);
- else if (T1<2*minperiod)
- thresh = MAX16(QCONST16(.5f,15), MULT16_16_Q15(QCONST16(.9f,15),g0)-cont);
- if (g1 > thresh)
- {
- best_xy = xy;
- best_yy = yy;
- T = T1;
- g = g1;
- }
- }
- best_xy = MAX32(0, best_xy);
- if (best_yy <= best_xy)
- pg = Q15ONE;
- else
- pg = SHR32(frac_div32(best_xy,best_yy+1),16);
-
- for (k=0;k<3;k++)
- xcorr[k] = celt_inner_prod(x, x-(T+k-1), N, arch);
- if ((xcorr[2]-xcorr[0]) > MULT16_32_Q15(QCONST16(.7f,15),xcorr[1]-xcorr[0]))
- offset = 1;
- else if ((xcorr[0]-xcorr[2]) > MULT16_32_Q15(QCONST16(.7f,15),xcorr[1]-xcorr[2]))
- offset = -1;
- else
- offset = 0;
- if (pg > g)
- pg = g;
- *T0_ = 2*T+offset;
-
- if (*T0_<minperiod0)
- *T0_=minperiod0;
- RESTORE_STACK;
- return pg;
-}
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