[xiph-cvs] cvs commit: speex/libspeex lsp.c nb_celp.c quant_lsp.c sb_celp.c smallft.c
Jean-Marc Valin
jm at xiph.org
Tue Oct 7 22:06:01 PDT 2003
jm 03/10/08 01:06:01
Modified: libspeex lsp.c nb_celp.c quant_lsp.c sb_celp.c smallft.c
Log:
fixed-point: LSP quantization work, also LSP's are now in the angle domain
Revision Changes Path
1.31 +4 -4 speex/libspeex/lsp.c
Index: lsp.c
===================================================================
RCS file: /usr/local/cvsroot/speex/libspeex/lsp.c,v
retrieving revision 1.30
retrieving revision 1.31
diff -u -r1.30 -r1.31
--- lsp.c 8 Oct 2003 04:44:02 -0000 1.30
+++ lsp.c 8 Oct 2003 05:06:01 -0000 1.31
@@ -291,7 +291,7 @@
}
/* once zero is found, reset initial interval to xr */
- freq[j] = (xm);
+ freq[j] = acos(xm);
xl = xm;
flag = 0; /* reset flag for next search */
}
@@ -335,7 +335,7 @@
freqn = PUSH(stack, lpcrdr, spx_word16_t);
for (i=0;i<lpcrdr;i++)
- freqn[i] = freq[i]*32768.;
+ freqn[i] = cos(freq[i])*32768.;
Wp = PUSH(stack, 4*m+2, spx_word32_t);
pw = Wp;
@@ -430,8 +430,8 @@
n2 = n1 + 1;
n3 = n2 + 1;
n4 = n3 + 1;
- xout1 = xin1 - 2*(freq[i2]) * *n1 + *n2;
- xout2 = xin2 - 2*(freq[i2+1]) * *n3 + *n4;
+ xout1 = xin1 - 2*(cos(freq[i2])) * *n1 + *n2;
+ xout2 = xin2 - 2*(cos(freq[i2+1])) * *n3 + *n4;
*n2 = *n1;
*n4 = *n3;
*n1 = xin1;
<p><p>1.136 +2 -18 speex/libspeex/nb_celp.c
Index: nb_celp.c
===================================================================
RCS file: /usr/local/cvsroot/speex/libspeex/nb_celp.c,v
retrieving revision 1.135
retrieving revision 1.136
diff -u -r1.135 -r1.136
--- nb_celp.c 8 Oct 2003 05:03:47 -0000 1.135
+++ nb_celp.c 8 Oct 2003 05:06:01 -0000 1.136
@@ -248,21 +248,13 @@
/* LPC to LSPs (x-domain) transform */
roots=lpc_to_lsp (st->lpc, st->lpcSize, st->lsp, 15, 0.2, stack);
/* Check if we found all the roots */
- if (roots==st->lpcSize)
+ if (roots!=st->lpcSize)
{
- /* LSP x-domain to angle domain*/
- for (i=0;i<st->lpcSize;i++)
- st->lsp[i] = acos(st->lsp[i]);
- } else {
/* Search again if we can afford it */
if (st->complexity>1)
roots = lpc_to_lsp (st->lpc, st->lpcSize, st->lsp, 11, 0.05, stack);
- if (roots==st->lpcSize)
+ if (roots!=st->lpcSize)
{
- /* LSP x-domain to angle domain*/
- for (i=0;i<st->lpcSize;i++)
- st->lsp[i] = acos(st->lsp[i]);
- } else {
/*If we can't find all LSP's, do some damage control and use previous filter*/
for (i=0;i<st->lpcSize;i++)
{
@@ -288,8 +280,6 @@
lsp_enforce_margin(st->interp_lsp, st->lpcSize, .002);
/* Compute interpolated LPCs (unquantized) for whole frame*/
- for (i=0;i<st->lpcSize;i++)
- st->interp_lsp[i] = cos(st->interp_lsp[i]);
lsp_to_lpc(st->interp_lsp, st->interp_lpc, st->lpcSize,stack);
@@ -647,12 +637,8 @@
lsp_enforce_margin(st->interp_qlsp, st->lpcSize, .002);
/* Compute interpolated LPCs (quantized and unquantized) */
- for (i=0;i<st->lpcSize;i++)
- st->interp_lsp[i] = cos(st->interp_lsp[i]);
lsp_to_lpc(st->interp_lsp, st->interp_lpc, st->lpcSize,stack);
- for (i=0;i<st->lpcSize;i++)
- st->interp_qlsp[i] = cos(st->interp_qlsp[i]);
lsp_to_lpc(st->interp_qlsp, st->interp_qlpc, st->lpcSize, stack);
/* Compute analysis filter gain at w=pi (for use in SB-CELP) */
@@ -1380,8 +1366,6 @@
/* Compute interpolated LPCs (unquantized) */
- for (i=0;i<st->lpcSize;i++)
- st->interp_qlsp[i] = cos(st->interp_qlsp[i]);
lsp_to_lpc(st->interp_qlsp, st->interp_qlpc, st->lpcSize, stack);
/* Compute enhanced synthesis filter */
<p><p>1.24 +78 -58 speex/libspeex/quant_lsp.c
Index: quant_lsp.c
===================================================================
RCS file: /usr/local/cvsroot/speex/libspeex/quant_lsp.c,v
retrieving revision 1.23
retrieving revision 1.24
diff -u -r1.23 -r1.24
--- quant_lsp.c 13 May 2003 20:57:31 -0000 1.23
+++ quant_lsp.c 8 Oct 2003 05:06:01 -0000 1.24
@@ -32,16 +32,28 @@
#include "quant_lsp.h"
#include <math.h>
+#include "misc.h"
extern int lsp_nb_vqid[64];
-static float quant_weight[MAX_LSP_SIZE];
+
+/* FIXME: Get rid of this kludge quick before someone gets hurt */
+static spx_word16_t quant_weight[MAX_LSP_SIZE];
+
+#ifdef FIXED_POINT
+#define LSP_SCALE 8192
+#define LSP_OVERSCALE 32
+#else
+#define LSP_SCALE 256
+#define LSP_OVERSCALE 1
+#endif
/* Note: x is modified*/
-static int lsp_quant(float *x, signed char *cdbk, int nbVec, int nbDim)
+static int lsp_quant(spx_word16_t *x, signed char *cdbk, int nbVec, int nbDim)
{
int i,j;
- float dist, tmp;
- float best_dist=0;
+ spx_word32_t dist;
+ spx_word16_t tmp;
+ spx_word32_t best_dist=0;
int best_id=0;
signed char *ptr=cdbk;
for (i=0;i<nbVec;i++)
@@ -49,8 +61,8 @@
dist=0;
for (j=0;j<nbDim;j++)
{
- tmp=(x[j]-*ptr++);
- dist+=tmp*tmp;
+ tmp=(x[j]-SHL((spx_word16_t)*ptr++,5));
+ dist+=MULT16_16(tmp,tmp);
}
if (dist<best_dist || i==0)
{
@@ -60,16 +72,17 @@
}
for (j=0;j<nbDim;j++)
- x[j] -= cdbk[best_id*nbDim+j];
+ x[j] -= SHL((spx_word16_t)cdbk[best_id*nbDim+j],5);
return best_id;
}
/* Note: x is modified*/
-static int lsp_weight_quant(float *x, float *weight, signed char *cdbk, int nbVec, int nbDim)
+static int lsp_weight_quant(spx_word16_t *x, spx_word16_t *weight, signed char *cdbk, int nbVec, int nbDim)
{
int i,j;
- float dist, tmp;
+ float dist;
+ spx_word16_t tmp;
float best_dist=0;
int best_id=0;
signed char *ptr=cdbk;
@@ -78,8 +91,8 @@
dist=0;
for (j=0;j<nbDim;j++)
{
- tmp=(x[j]-*ptr++);
- dist+=weight[j]*tmp*tmp;
+ tmp=(x[j]-SHL((spx_word16_t)*ptr++,5));
+ dist+=MULT16_32_Q15(weight[j],MULT16_16(tmp,tmp));
}
if (dist<best_dist || i==0)
{
@@ -89,7 +102,7 @@
}
for (j=0;j<nbDim;j++)
- x[j] -= cdbk[best_id*nbDim+j];
+ x[j] -= SHL((spx_word16_t)cdbk[best_id*nbDim+j],5);
return best_id;
}
@@ -99,54 +112,57 @@
int i;
float tmp1, tmp2;
int id;
-
+ /* FIXME: get rid of that static allocation */
+ spx_word16_t nlsp[10];
+
for (i=0;i<order;i++)
qlsp[i]=lsp[i];
- quant_weight[0] = 1/(qlsp[1]-qlsp[0]);
- quant_weight[order-1] = 1/(qlsp[order-1]-qlsp[order-2]);
+ quant_weight[0] = 10/(qlsp[1]-qlsp[0]);
+ quant_weight[order-1] = 10/(qlsp[order-1]-qlsp[order-2]);
for (i=1;i<order-1;i++)
{
#if 1
- tmp1 = 1/((.15+qlsp[i]-qlsp[i-1])*(.15+qlsp[i]-qlsp[i-1]));
- tmp2 = 1/((.15+qlsp[i+1]-qlsp[i])*(.15+qlsp[i+1]-qlsp[i]));
+ tmp1 = 10/((.15+qlsp[i]-qlsp[i-1])*(.15+qlsp[i]-qlsp[i-1]));
+ tmp2 = 10/((.15+qlsp[i+1]-qlsp[i])*(.15+qlsp[i+1]-qlsp[i]));
#else
- tmp1 = 1/(qlsp[i]-qlsp[i-1]);
- tmp2 = 1/(qlsp[i+1]-qlsp[i]);
+ tmp1 = 10/(qlsp[i]-qlsp[i-1]);
+ tmp2 = 10/(qlsp[i+1]-qlsp[i]);
#endif
quant_weight[i] = tmp1 > tmp2 ? tmp1 : tmp2;
}
for (i=0;i<order;i++)
qlsp[i]-=(.25*i+.25);
+
for (i=0;i<order;i++)
- qlsp[i]*=256;
+ nlsp[i] = LSP_SCALE*qlsp[i];
- id = lsp_quant(qlsp, cdbk_nb, NB_CDBK_SIZE, order);
+ id = lsp_quant(nlsp, cdbk_nb, NB_CDBK_SIZE, order);
speex_bits_pack(bits, id, 6);
for (i=0;i<order;i++)
- qlsp[i]*=2;
+ nlsp[i]*=2;
- id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low1, NB_CDBK_SIZE_LOW1, 5);
+ id = lsp_weight_quant(nlsp, quant_weight, cdbk_nb_low1, NB_CDBK_SIZE_LOW1, 5);
speex_bits_pack(bits, id, 6);
for (i=0;i<5;i++)
- qlsp[i]*=2;
+ nlsp[i]*=2;
- id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low2, NB_CDBK_SIZE_LOW2, 5);
+ id = lsp_weight_quant(nlsp, quant_weight, cdbk_nb_low2, NB_CDBK_SIZE_LOW2, 5);
speex_bits_pack(bits, id, 6);
- id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high1, NB_CDBK_SIZE_HIGH1, 5);
+ id = lsp_weight_quant(nlsp+5, quant_weight+5, cdbk_nb_high1, NB_CDBK_SIZE_HIGH1, 5);
speex_bits_pack(bits, id, 6);
for (i=5;i<10;i++)
- qlsp[i]*=2;
+ nlsp[i]*=2;
- id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high2, NB_CDBK_SIZE_HIGH2, 5);
+ id = lsp_weight_quant(nlsp+5, quant_weight+5, cdbk_nb_high2, NB_CDBK_SIZE_HIGH2, 5);
speex_bits_pack(bits, id, 6);
for (i=0;i<order;i++)
- qlsp[i]*=.00097656;
+ qlsp[i]=nlsp[i] * (.00097656/LSP_OVERSCALE);
for (i=0;i<order;i++)
qlsp[i]=lsp[i]-qlsp[i];
@@ -186,20 +202,21 @@
int i;
float tmp1, tmp2;
int id;
+ spx_word16_t nlsp[10];
for (i=0;i<order;i++)
qlsp[i]=lsp[i];
- quant_weight[0] = 1/(qlsp[1]-qlsp[0]);
- quant_weight[order-1] = 1/(qlsp[order-1]-qlsp[order-2]);
+ quant_weight[0] = 10/(qlsp[1]-qlsp[0]);
+ quant_weight[order-1] = 10/(qlsp[order-1]-qlsp[order-2]);
for (i=1;i<order-1;i++)
{
#if 1
- tmp1 = 1/((.15+qlsp[i]-qlsp[i-1])*(.15+qlsp[i]-qlsp[i-1]));
- tmp2 = 1/((.15+qlsp[i+1]-qlsp[i])*(.15+qlsp[i+1]-qlsp[i]));
+ tmp1 = 10/((.15+qlsp[i]-qlsp[i-1])*(.15+qlsp[i]-qlsp[i-1]));
+ tmp2 = 10/((.15+qlsp[i+1]-qlsp[i])*(.15+qlsp[i+1]-qlsp[i]));
#else
- tmp1 = 1/(qlsp[i]-qlsp[i-1]);
- tmp2 = 1/(qlsp[i+1]-qlsp[i]);
+ tmp1 = 10/(qlsp[i]-qlsp[i-1]);
+ tmp2 = 10/(qlsp[i+1]-qlsp[i]);
#endif
quant_weight[i] = tmp1 > tmp2 ? tmp1 : tmp2;
}
@@ -207,22 +224,22 @@
for (i=0;i<order;i++)
qlsp[i]-=(.25*i+.25);
for (i=0;i<order;i++)
- qlsp[i]*=256;
+ nlsp[i]=qlsp[i]*LSP_SCALE;
- id = lsp_quant(qlsp, cdbk_nb, NB_CDBK_SIZE, order);
+ id = lsp_quant(nlsp, cdbk_nb, NB_CDBK_SIZE, order);
speex_bits_pack(bits, id, 6);
for (i=0;i<order;i++)
- qlsp[i]*=2;
+ nlsp[i]*=2;
- id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low1, NB_CDBK_SIZE_LOW1, 5);
+ id = lsp_weight_quant(nlsp, quant_weight, cdbk_nb_low1, NB_CDBK_SIZE_LOW1, 5);
speex_bits_pack(bits, id, 6);
- id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high1, NB_CDBK_SIZE_HIGH1, 5);
+ id = lsp_weight_quant(nlsp+5, quant_weight+5, cdbk_nb_high1, NB_CDBK_SIZE_HIGH1, 5);
speex_bits_pack(bits, id, 6);
for (i=0;i<order;i++)
- qlsp[i]*=0.0019531;
+ qlsp[i] = nlsp[i]*(0.0019531/LSP_OVERSCALE);
for (i=0;i<order;i++)
qlsp[i]=lsp[i]-qlsp[i];
@@ -259,34 +276,36 @@
int i;
float tmp1, tmp2;
int id;
+ spx_word16_t nlsp[10];
+
for (i=0;i<order;i++)
qlsp[i]=lsp[i];
- quant_weight[0] = 1/(qlsp[1]-qlsp[0]);
- quant_weight[order-1] = 1/(qlsp[order-1]-qlsp[order-2]);
+ quant_weight[0] = 10/(qlsp[1]-qlsp[0]);
+ quant_weight[order-1] = 10/(qlsp[order-1]-qlsp[order-2]);
for (i=1;i<order-1;i++)
{
- tmp1 = 1/(qlsp[i]-qlsp[i-1]);
- tmp2 = 1/(qlsp[i+1]-qlsp[i]);
+ tmp1 = 10/(qlsp[i]-qlsp[i-1]);
+ tmp2 = 10/(qlsp[i+1]-qlsp[i]);
quant_weight[i] = tmp1 > tmp2 ? tmp1 : tmp2;
}
for (i=0;i<order;i++)
qlsp[i]-=(.3125*i+.75);
for (i=0;i<order;i++)
- qlsp[i]*=256;
+ nlsp[i] = qlsp[i]*LSP_SCALE;
- id = lsp_quant(qlsp, high_lsp_cdbk, 64, order);
+ id = lsp_quant(nlsp, high_lsp_cdbk, 64, order);
speex_bits_pack(bits, id, 6);
for (i=0;i<order;i++)
- qlsp[i]*=2;
+ nlsp[i]*=2;
- id = lsp_weight_quant(qlsp, quant_weight, high_lsp_cdbk2, 64, order);
+ id = lsp_weight_quant(nlsp, quant_weight, high_lsp_cdbk2, 64, order);
speex_bits_pack(bits, id, 6);
for (i=0;i<order;i++)
- qlsp[i]*=0.0019531;
+ qlsp[i] = nlsp[i]*(0.0019531/LSP_OVERSCALE);
for (i=0;i<order;i++)
qlsp[i]=lsp[i]-qlsp[i];
@@ -321,20 +340,21 @@
int i;
float tmp1, tmp2;
int id;
+ spx_word16_t nlsp[10];
for (i=0;i<order;i++)
qlsp[i]=lsp[i];
- quant_weight[0] = 1/(qlsp[1]-qlsp[0]);
- quant_weight[order-1] = 1/(qlsp[order-1]-qlsp[order-2]);
+ quant_weight[0] = 10/(qlsp[1]-qlsp[0]);
+ quant_weight[order-1] = 10/(qlsp[order-1]-qlsp[order-2]);
for (i=1;i<order-1;i++)
{
#if 1
- tmp1 = 1/((.15+qlsp[i]-qlsp[i-1])*(.15+qlsp[i]-qlsp[i-1]));
- tmp2 = 1/((.15+qlsp[i+1]-qlsp[i])*(.15+qlsp[i+1]-qlsp[i]));
+ tmp1 = 10/((.15+qlsp[i]-qlsp[i-1])*(.15+qlsp[i]-qlsp[i-1]));
+ tmp2 = 10/((.15+qlsp[i+1]-qlsp[i])*(.15+qlsp[i+1]-qlsp[i]));
#else
- tmp1 = 1/(qlsp[i]-qlsp[i-1]);
- tmp2 = 1/(qlsp[i+1]-qlsp[i]);
+ tmp1 = 10/(qlsp[i]-qlsp[i-1]);
+ tmp2 = 10/(qlsp[i+1]-qlsp[i]);
#endif
quant_weight[i] = tmp1 > tmp2 ? tmp1 : tmp2;
}
@@ -342,7 +362,7 @@
for (i=0;i<order;i++)
qlsp[i]-=(.25*i+.3125);
for (i=0;i<order;i++)
- qlsp[i]*=256;
+ nlsp[i]=qlsp[i]*LSP_SCALE;
id = lsp_quant(qlsp, cdbk_lsp_vlbr, 512, order);
speex_bits_pack(bits, id, 9);
@@ -354,7 +374,7 @@
speex_bits_pack(bits, id, 4);
for (i=0;i<order;i++)
- qlsp[i]*=0.00097655;
+ qlsp[i]=nlsp[i]*(0.00097655/LSP_OVERSCALE);
for (i=0;i<order;i++)
qlsp[i]=lsp[i]-qlsp[i];
<p><p>1.138 +21 -21 speex/libspeex/sb_celp.c
Index: sb_celp.c
===================================================================
RCS file: /usr/local/cvsroot/speex/libspeex/sb_celp.c,v
retrieving revision 1.137
retrieving revision 1.138
diff -u -r1.137 -r1.138
--- sb_celp.c 8 Oct 2003 05:03:47 -0000 1.137
+++ sb_celp.c 8 Oct 2003 05:06:01 -0000 1.138
@@ -327,15 +327,11 @@
/*If we can't find all LSP's, do some damage control and use a flat filter*/
for (i=0;i<st->lpcSize;i++)
{
- st->lsp[i]=cos(M_PI*((float)(i+1))/(st->lpcSize+1));
+ st->lsp[i]=M_PI*((float)(i+1))/(st->lpcSize+1);
}
}
}
- /* x-domain to angle domain*/
- for (i=0;i<st->lpcSize;i++)
- st->lsp[i] = acos(st->lsp[i]);
-
/* VBR code */
if ((st->vbr_enabled || st->vad_enabled) && !dtx)
{
@@ -496,13 +492,6 @@
lsp_enforce_margin(st->interp_lsp, st->lpcSize, .05);
lsp_enforce_margin(st->interp_qlsp, st->lpcSize, .05);
- /* Compute interpolated LPCs (quantized and unquantized) */
- for (i=0;i<st->lpcSize;i++)
- st->interp_lsp[i] = cos(st->interp_lsp[i]);
- for (i=0;i<st->lpcSize;i++)
- st->interp_qlsp[i] = cos(st->interp_qlsp[i]);
-
-
lsp_to_lpc(st->interp_lsp, st->interp_lpc, st->lpcSize,stack);
lsp_to_lpc(st->interp_qlsp, st->interp_qlpc, st->lpcSize, stack);
@@ -823,9 +812,14 @@
fir_mem_up(st->x0d, h0, st->y0, st->full_frame_size, QMF_ORDER, st->g0_mem, stack);
fir_mem_up(st->high, h1, st->y1, st->full_frame_size, QMF_ORDER, st->g1_mem, stack);
+#ifdef FIXED_POINT
for (i=0;i<st->full_frame_size;i++)
- out[i]=2*(st->y0[i]-st->y1[i]);
-
+ out[i]=SHR(st->y0[i]-st->y1[i],SIG_SHIFT-1);
+#else
+ for (i=0;i<st->full_frame_size;i++)
+ out[i]=2*(st->y0[i]-st->y1[i]);
+#endif
+
if (dtx)
{
st->submodeID=saved_modeid;
@@ -921,9 +915,14 @@
fir_mem_up(st->x0d, h0, st->y0, st->full_frame_size, QMF_ORDER, st->g0_mem, stack);
fir_mem_up(st->high, h1, st->y1, st->full_frame_size, QMF_ORDER, st->g1_mem, stack);
+#ifdef FIXED_POINT
for (i=0;i<st->full_frame_size;i++)
- out[i]=2*(st->y0[i]-st->y1[i]) / SIG_SCALING;
-
+ out[i]=SHR(st->y0[i]-st->y1[i],SIG_SHIFT-1);
+#else
+ for (i=0;i<st->full_frame_size;i++)
+ out[i]=2*(st->y0[i]-st->y1[i]);
+#endif
+
return 0;
}
@@ -968,10 +967,6 @@
lsp_enforce_margin(st->interp_qlsp, st->lpcSize, .05);
- /* LSPs to x-domain */
- for (i=0;i<st->lpcSize;i++)
- st->interp_qlsp[i] = cos(st->interp_qlsp[i]);
-
/* LSP to LPC */
lsp_to_lpc(st->interp_qlsp, st->interp_qlpc, st->lpcSize, stack);
@@ -1087,8 +1082,13 @@
fir_mem_up(st->x0d, h0, st->y0, st->full_frame_size, QMF_ORDER, st->g0_mem, stack);
fir_mem_up(st->high, h1, st->y1, st->full_frame_size, QMF_ORDER, st->g1_mem, stack);
+#ifdef FIXED_POINT
for (i=0;i<st->full_frame_size;i++)
- out[i]=SHR((st->y0[i]-st->y1[i]), SIG_SHIFT-1);
+ out[i]=SHR(st->y0[i]-st->y1[i],SIG_SHIFT-1);
+#else
+ for (i=0;i<st->full_frame_size;i++)
+ out[i]=2*(st->y0[i]-st->y1[i]);
+#endif
for (i=0;i<st->lpcSize;i++)
st->old_qlsp[i] = st->qlsp[i];
<p><p>1.16 +0 -0 speex/libspeex/smallft.c
Index: smallft.c
===================================================================
RCS file: /usr/local/cvsroot/speex/libspeex/smallft.c,v
retrieving revision 1.15
retrieving revision 1.16
diff -u -r1.15 -r1.16
--- smallft.c 8 Oct 2003 05:03:47 -0000 1.15
+++ smallft.c 8 Oct 2003 05:06:01 -0000 1.16
@@ -11,7 +11,7 @@
********************************************************************
function: *unnormalized* fft transform
- last mod: $Id: smallft.c,v 1.15 2003/10/08 05:03:47 jm Exp $
+ last mod: $Id: smallft.c,v 1.16 2003/10/08 05:06:01 jm Exp $
********************************************************************/
<p><p>--- >8 ----
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