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q3rally/engine/code/libvorbis-1.3.6/lib/floor1.c
zturtleman 0d5fb492cd ioquake3 resync to revision 3444 from 3393. 
Fix GCC 6 misleading-indentation warning
add SECURITY.md
OpenGL2: Restore adding fixed ambient light when HDR is enabled
Few LCC memory fixes.
fix a few potential buffer overwrite in Game VM
Enable compiler optimization on all macOS architectures
Don't allow qagame module to create "botlib.log" at ANY filesystem location
Make FS_BuildOSPath for botlib.log consistent with typical usage
tiny readme thing
Remove extra plus sign from Huff_Compress()
Fix VMs being able to change CVAR_PROTECTED cvars
Don't register fs_game cvar everywhere just to get the value
Don't let VMs change engine latch cvars immediately
Fix fs_game '..' reading outside of home and base path
Fix VMs forcing engine latch cvar to update to latched value
Revert my recent cvar latch changes
Revert "Don't let VMs change engine latch cvars immediately"
Partially revert "Fix fs_game '..' reading outside of home and base path"
Revert "Fix VMs forcing engine latch cvar to update to latched value"
Fix exploit to bypass filename restrictions on Windows
Changes to systemd q3a.service
Fix Q_vsnprintf for mingw-w64
Fix timelimit causing an infinite map ending loop
Fix invalid access to cluster 0 in AAS_AreaRouteToGoalArea()
Fix negative frag/capturelimit causing an infinite map end loop
OpenGL2: Fix dark lightmap on shader in mpteam6
Make FS_InvalidGameDir() consider subdirectories invalid
[qcommon] Remove dead serialization code
[qcommon] Make several zone variables and functions static.
Fix MAC_OS_X_VERSION_MIN_REQUIRED for macOS 10.10 and later
Increase q3_ui .arena filename list buffer size to 4096 bytes
OpenGL2: Fix crash when BSP has deluxe maps and vertex lit surfaces
Support Unicode characters greater than 0xFF in cl_consoleKeys
Fix macOS app bundle with space in name
OpenGL1: Use glGenTextures instead of hardcoded values
Remove CON_FlushIn function and where STDIN needs flushing, use tcflush POSIX function
Update libogg from 1.3.2 to 1.3.3
Rename (already updated) libogg-1.3.2 to libogg-1.3.3
Update libvorbis from 1.3.5 to 1.3.6
* Fix CVE-2018-5146 - out-of-bounds write on codebook decoding.
* Fix CVE-2017-14632 - free() on unitialized data
* Fix CVE-2017-14633 - out-of-bounds read
Rename (already updated) libvorbis-1.3.5 to libvorbis-1.3.6
Update opus from 1.1.4 to 1.2.1
Rename (already updated) opus-1.1.4 to opus-1.2.1
Update opusfile from 0.8 to 0.9
Rename (already updated) opusfile-0.8 to opusfile-0.9
First swing at a CONTRIBUTING.md
Allow loading system OpenAL library on macOS again
Remove duplicate setting of FREETYPE_CFLAGS in Makefile
Fix exploit to reset player by sending wrong serverId
Fix "Going to CS_ZOMBIE for [clientname]" developer message
Fix MSG_Read*String*() functions not being able to read last byte from message
2018-04-07 23:02:52 +00:00

1086 lines
30 KiB
C
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2015 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: floor backend 1 implementation
********************************************************************/
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <ogg/ogg.h>
#include "vorbis/codec.h"
#include "codec_internal.h"
#include "registry.h"
#include "codebook.h"
#include "misc.h"
#include "scales.h"
#include <stdio.h>
#define floor1_rangedB 140 /* floor 1 fixed at -140dB to 0dB range */
typedef struct lsfit_acc{
int x0;
int x1;
int xa;
int ya;
int x2a;
int y2a;
int xya;
int an;
int xb;
int yb;
int x2b;
int y2b;
int xyb;
int bn;
} lsfit_acc;
/***********************************************/
static void floor1_free_info(vorbis_info_floor *i){
vorbis_info_floor1 *info=(vorbis_info_floor1 *)i;
if(info){
memset(info,0,sizeof(*info));
_ogg_free(info);
}
}
static void floor1_free_look(vorbis_look_floor *i){
vorbis_look_floor1 *look=(vorbis_look_floor1 *)i;
if(look){
/*fprintf(stderr,"floor 1 bit usage %f:%f (%f total)\n",
(float)look->phrasebits/look->frames,
(float)look->postbits/look->frames,
(float)(look->postbits+look->phrasebits)/look->frames);*/
memset(look,0,sizeof(*look));
_ogg_free(look);
}
}
static void floor1_pack (vorbis_info_floor *i,oggpack_buffer *opb){
vorbis_info_floor1 *info=(vorbis_info_floor1 *)i;
int j,k;
int count=0;
int rangebits;
int maxposit=info->postlist[1];
int maxclass=-1;
/* save out partitions */
oggpack_write(opb,info->partitions,5); /* only 0 to 31 legal */
for(j=0;j<info->partitions;j++){
oggpack_write(opb,info->partitionclass[j],4); /* only 0 to 15 legal */
if(maxclass<info->partitionclass[j])maxclass=info->partitionclass[j];
}
/* save out partition classes */
for(j=0;j<maxclass+1;j++){
oggpack_write(opb,info->class_dim[j]-1,3); /* 1 to 8 */
oggpack_write(opb,info->class_subs[j],2); /* 0 to 3 */
if(info->class_subs[j])oggpack_write(opb,info->class_book[j],8);
for(k=0;k<(1<<info->class_subs[j]);k++)
oggpack_write(opb,info->class_subbook[j][k]+1,8);
}
/* save out the post list */
oggpack_write(opb,info->mult-1,2); /* only 1,2,3,4 legal now */
/* maxposit cannot legally be less than 1; this is encode-side, we
can assume our setup is OK */
oggpack_write(opb,ov_ilog(maxposit-1),4);
rangebits=ov_ilog(maxposit-1);
for(j=0,k=0;j<info->partitions;j++){
count+=info->class_dim[info->partitionclass[j]];
for(;k<count;k++)
oggpack_write(opb,info->postlist[k+2],rangebits);
}
}
static int icomp(const void *a,const void *b){
return(**(int **)a-**(int **)b);
}
static vorbis_info_floor *floor1_unpack (vorbis_info *vi,oggpack_buffer *opb){
codec_setup_info *ci=vi->codec_setup;
int j,k,count=0,maxclass=-1,rangebits;
vorbis_info_floor1 *info=_ogg_calloc(1,sizeof(*info));
/* read partitions */
info->partitions=oggpack_read(opb,5); /* only 0 to 31 legal */
for(j=0;j<info->partitions;j++){
info->partitionclass[j]=oggpack_read(opb,4); /* only 0 to 15 legal */
if(info->partitionclass[j]<0)goto err_out;
if(maxclass<info->partitionclass[j])maxclass=info->partitionclass[j];
}
/* read partition classes */
for(j=0;j<maxclass+1;j++){
info->class_dim[j]=oggpack_read(opb,3)+1; /* 1 to 8 */
info->class_subs[j]=oggpack_read(opb,2); /* 0,1,2,3 bits */
if(info->class_subs[j]<0)
goto err_out;
if(info->class_subs[j])info->class_book[j]=oggpack_read(opb,8);
if(info->class_book[j]<0 || info->class_book[j]>=ci->books)
goto err_out;
for(k=0;k<(1<<info->class_subs[j]);k++){
info->class_subbook[j][k]=oggpack_read(opb,8)-1;
if(info->class_subbook[j][k]<-1 || info->class_subbook[j][k]>=ci->books)
goto err_out;
}
}
/* read the post list */
info->mult=oggpack_read(opb,2)+1; /* only 1,2,3,4 legal now */
rangebits=oggpack_read(opb,4);
if(rangebits<0)goto err_out;
for(j=0,k=0;j<info->partitions;j++){
count+=info->class_dim[info->partitionclass[j]];
if(count>VIF_POSIT) goto err_out;
for(;k<count;k++){
int t=info->postlist[k+2]=oggpack_read(opb,rangebits);
if(t<0 || t>=(1<<rangebits))
goto err_out;
}
}
info->postlist[0]=0;
info->postlist[1]=1<<rangebits;
/* don't allow repeated values in post list as they'd result in
zero-length segments */
{
int *sortpointer[VIF_POSIT+2];
for(j=0;j<count+2;j++)sortpointer[j]=info->postlist+j;
qsort(sortpointer,count+2,sizeof(*sortpointer),icomp);
for(j=1;j<count+2;j++)
if(*sortpointer[j-1]==*sortpointer[j])goto err_out;
}
return(info);
err_out:
floor1_free_info(info);
return(NULL);
}
static vorbis_look_floor *floor1_look(vorbis_dsp_state *vd,
vorbis_info_floor *in){
int *sortpointer[VIF_POSIT+2];
vorbis_info_floor1 *info=(vorbis_info_floor1 *)in;
vorbis_look_floor1 *look=_ogg_calloc(1,sizeof(*look));
int i,j,n=0;
(void)vd;
look->vi=info;
look->n=info->postlist[1];
/* we drop each position value in-between already decoded values,
and use linear interpolation to predict each new value past the
edges. The positions are read in the order of the position
list... we precompute the bounding positions in the lookup. Of
course, the neighbors can change (if a position is declined), but
this is an initial mapping */
for(i=0;i<info->partitions;i++)n+=info->class_dim[info->partitionclass[i]];
n+=2;
look->posts=n;
/* also store a sorted position index */
for(i=0;i<n;i++)sortpointer[i]=info->postlist+i;
qsort(sortpointer,n,sizeof(*sortpointer),icomp);
/* points from sort order back to range number */
for(i=0;i<n;i++)look->forward_index[i]=sortpointer[i]-info->postlist;
/* points from range order to sorted position */
for(i=0;i<n;i++)look->reverse_index[look->forward_index[i]]=i;
/* we actually need the post values too */
for(i=0;i<n;i++)look->sorted_index[i]=info->postlist[look->forward_index[i]];
/* quantize values to multiplier spec */
switch(info->mult){
case 1: /* 1024 -> 256 */
look->quant_q=256;
break;
case 2: /* 1024 -> 128 */
look->quant_q=128;
break;
case 3: /* 1024 -> 86 */
look->quant_q=86;
break;
case 4: /* 1024 -> 64 */
look->quant_q=64;
break;
}
/* discover our neighbors for decode where we don't use fit flags
(that would push the neighbors outward) */
for(i=0;i<n-2;i++){
int lo=0;
int hi=1;
int lx=0;
int hx=look->n;
int currentx=info->postlist[i+2];
for(j=0;j<i+2;j++){
int x=info->postlist[j];
if(x>lx && x<currentx){
lo=j;
lx=x;
}
if(x<hx && x>currentx){
hi=j;
hx=x;
}
}
look->loneighbor[i]=lo;
look->hineighbor[i]=hi;
}
return(look);
}
static int render_point(int x0,int x1,int y0,int y1,int x){
y0&=0x7fff; /* mask off flag */
y1&=0x7fff;
{
int dy=y1-y0;
int adx=x1-x0;
int ady=abs(dy);
int err=ady*(x-x0);
int off=err/adx;
if(dy<0)return(y0-off);
return(y0+off);
}
}
static int vorbis_dBquant(const float *x){
int i= *x*7.3142857f+1023.5f;
if(i>1023)return(1023);
if(i<0)return(0);
return i;
}
static const float FLOOR1_fromdB_LOOKUP[256]={
1.0649863e-07F, 1.1341951e-07F, 1.2079015e-07F, 1.2863978e-07F,
1.3699951e-07F, 1.4590251e-07F, 1.5538408e-07F, 1.6548181e-07F,
1.7623575e-07F, 1.8768855e-07F, 1.9988561e-07F, 2.128753e-07F,
2.2670913e-07F, 2.4144197e-07F, 2.5713223e-07F, 2.7384213e-07F,
2.9163793e-07F, 3.1059021e-07F, 3.3077411e-07F, 3.5226968e-07F,
3.7516214e-07F, 3.9954229e-07F, 4.2550680e-07F, 4.5315863e-07F,
4.8260743e-07F, 5.1396998e-07F, 5.4737065e-07F, 5.8294187e-07F,
6.2082472e-07F, 6.6116941e-07F, 7.0413592e-07F, 7.4989464e-07F,
7.9862701e-07F, 8.5052630e-07F, 9.0579828e-07F, 9.6466216e-07F,
1.0273513e-06F, 1.0941144e-06F, 1.1652161e-06F, 1.2409384e-06F,
1.3215816e-06F, 1.4074654e-06F, 1.4989305e-06F, 1.5963394e-06F,
1.7000785e-06F, 1.8105592e-06F, 1.9282195e-06F, 2.0535261e-06F,
2.1869758e-06F, 2.3290978e-06F, 2.4804557e-06F, 2.6416497e-06F,
2.8133190e-06F, 2.9961443e-06F, 3.1908506e-06F, 3.3982101e-06F,
3.6190449e-06F, 3.8542308e-06F, 4.1047004e-06F, 4.3714470e-06F,
4.6555282e-06F, 4.9580707e-06F, 5.2802740e-06F, 5.6234160e-06F,
5.9888572e-06F, 6.3780469e-06F, 6.7925283e-06F, 7.2339451e-06F,
7.7040476e-06F, 8.2047000e-06F, 8.7378876e-06F, 9.3057248e-06F,
9.9104632e-06F, 1.0554501e-05F, 1.1240392e-05F, 1.1970856e-05F,
1.2748789e-05F, 1.3577278e-05F, 1.4459606e-05F, 1.5399272e-05F,
1.6400004e-05F, 1.7465768e-05F, 1.8600792e-05F, 1.9809576e-05F,
2.1096914e-05F, 2.2467911e-05F, 2.3928002e-05F, 2.5482978e-05F,
2.7139006e-05F, 2.8902651e-05F, 3.0780908e-05F, 3.2781225e-05F,
3.4911534e-05F, 3.7180282e-05F, 3.9596466e-05F, 4.2169667e-05F,
4.4910090e-05F, 4.7828601e-05F, 5.0936773e-05F, 5.4246931e-05F,
5.7772202e-05F, 6.1526565e-05F, 6.5524908e-05F, 6.9783085e-05F,
7.4317983e-05F, 7.9147585e-05F, 8.4291040e-05F, 8.9768747e-05F,
9.5602426e-05F, 0.00010181521F, 0.00010843174F, 0.00011547824F,
0.00012298267F, 0.00013097477F, 0.00013948625F, 0.00014855085F,
0.00015820453F, 0.00016848555F, 0.00017943469F, 0.00019109536F,
0.00020351382F, 0.00021673929F, 0.00023082423F, 0.00024582449F,
0.00026179955F, 0.00027881276F, 0.00029693158F, 0.00031622787F,
0.00033677814F, 0.00035866388F, 0.00038197188F, 0.00040679456F,
0.00043323036F, 0.00046138411F, 0.00049136745F, 0.00052329927F,
0.00055730621F, 0.00059352311F, 0.00063209358F, 0.00067317058F,
0.00071691700F, 0.00076350630F, 0.00081312324F, 0.00086596457F,
0.00092223983F, 0.00098217216F, 0.0010459992F, 0.0011139742F,
0.0011863665F, 0.0012634633F, 0.0013455702F, 0.0014330129F,
0.0015261382F, 0.0016253153F, 0.0017309374F, 0.0018434235F,
0.0019632195F, 0.0020908006F, 0.0022266726F, 0.0023713743F,
0.0025254795F, 0.0026895994F, 0.0028643847F, 0.0030505286F,
0.0032487691F, 0.0034598925F, 0.0036847358F, 0.0039241906F,
0.0041792066F, 0.0044507950F, 0.0047400328F, 0.0050480668F,
0.0053761186F, 0.0057254891F, 0.0060975636F, 0.0064938176F,
0.0069158225F, 0.0073652516F, 0.0078438871F, 0.0083536271F,
0.0088964928F, 0.009474637F, 0.010090352F, 0.010746080F,
0.011444421F, 0.012188144F, 0.012980198F, 0.013823725F,
0.014722068F, 0.015678791F, 0.016697687F, 0.017782797F,
0.018938423F, 0.020169149F, 0.021479854F, 0.022875735F,
0.024362330F, 0.025945531F, 0.027631618F, 0.029427276F,
0.031339626F, 0.033376252F, 0.035545228F, 0.037855157F,
0.040315199F, 0.042935108F, 0.045725273F, 0.048696758F,
0.051861348F, 0.055231591F, 0.058820850F, 0.062643361F,
0.066714279F, 0.071049749F, 0.075666962F, 0.080584227F,
0.085821044F, 0.091398179F, 0.097337747F, 0.10366330F,
0.11039993F, 0.11757434F, 0.12521498F, 0.13335215F,
0.14201813F, 0.15124727F, 0.16107617F, 0.17154380F,
0.18269168F, 0.19456402F, 0.20720788F, 0.22067342F,
0.23501402F, 0.25028656F, 0.26655159F, 0.28387361F,
0.30232132F, 0.32196786F, 0.34289114F, 0.36517414F,
0.38890521F, 0.41417847F, 0.44109412F, 0.46975890F,
0.50028648F, 0.53279791F, 0.56742212F, 0.60429640F,
0.64356699F, 0.68538959F, 0.72993007F, 0.77736504F,
0.82788260F, 0.88168307F, 0.9389798F, 1.F,
};
static void render_line(int n, int x0,int x1,int y0,int y1,float *d){
int dy=y1-y0;
int adx=x1-x0;
int ady=abs(dy);
int base=dy/adx;
int sy=(dy<0?base-1:base+1);
int x=x0;
int y=y0;
int err=0;
ady-=abs(base*adx);
if(n>x1)n=x1;
if(x<n)
d[x]*=FLOOR1_fromdB_LOOKUP[y];
while(++x<n){
err=err+ady;
if(err>=adx){
err-=adx;
y+=sy;
}else{
y+=base;
}
d[x]*=FLOOR1_fromdB_LOOKUP[y];
}
}
static void render_line0(int n, int x0,int x1,int y0,int y1,int *d){
int dy=y1-y0;
int adx=x1-x0;
int ady=abs(dy);
int base=dy/adx;
int sy=(dy<0?base-1:base+1);
int x=x0;
int y=y0;
int err=0;
ady-=abs(base*adx);
if(n>x1)n=x1;
if(x<n)
d[x]=y;
while(++x<n){
err=err+ady;
if(err>=adx){
err-=adx;
y+=sy;
}else{
y+=base;
}
d[x]=y;
}
}
/* the floor has already been filtered to only include relevant sections */
static int accumulate_fit(const float *flr,const float *mdct,
int x0, int x1,lsfit_acc *a,
int n,vorbis_info_floor1 *info){
long i;
int xa=0,ya=0,x2a=0,y2a=0,xya=0,na=0, xb=0,yb=0,x2b=0,y2b=0,xyb=0,nb=0;
memset(a,0,sizeof(*a));
a->x0=x0;
a->x1=x1;
if(x1>=n)x1=n-1;
for(i=x0;i<=x1;i++){
int quantized=vorbis_dBquant(flr+i);
if(quantized){
if(mdct[i]+info->twofitatten>=flr[i]){
xa += i;
ya += quantized;
x2a += i*i;
y2a += quantized*quantized;
xya += i*quantized;
na++;
}else{
xb += i;
yb += quantized;
x2b += i*i;
y2b += quantized*quantized;
xyb += i*quantized;
nb++;
}
}
}
a->xa=xa;
a->ya=ya;
a->x2a=x2a;
a->y2a=y2a;
a->xya=xya;
a->an=na;
a->xb=xb;
a->yb=yb;
a->x2b=x2b;
a->y2b=y2b;
a->xyb=xyb;
a->bn=nb;
return(na);
}
static int fit_line(lsfit_acc *a,int fits,int *y0,int *y1,
vorbis_info_floor1 *info){
double xb=0,yb=0,x2b=0,y2b=0,xyb=0,bn=0;
int i;
int x0=a[0].x0;
int x1=a[fits-1].x1;
for(i=0;i<fits;i++){
double weight = (a[i].bn+a[i].an)*info->twofitweight/(a[i].an+1)+1.;
xb+=a[i].xb + a[i].xa * weight;
yb+=a[i].yb + a[i].ya * weight;
x2b+=a[i].x2b + a[i].x2a * weight;
y2b+=a[i].y2b + a[i].y2a * weight;
xyb+=a[i].xyb + a[i].xya * weight;
bn+=a[i].bn + a[i].an * weight;
}
if(*y0>=0){
xb+= x0;
yb+= *y0;
x2b+= x0 * x0;
y2b+= *y0 * *y0;
xyb+= *y0 * x0;
bn++;
}
if(*y1>=0){
xb+= x1;
yb+= *y1;
x2b+= x1 * x1;
y2b+= *y1 * *y1;
xyb+= *y1 * x1;
bn++;
}
{
double denom=(bn*x2b-xb*xb);
if(denom>0.){
double a=(yb*x2b-xyb*xb)/denom;
double b=(bn*xyb-xb*yb)/denom;
*y0=rint(a+b*x0);
*y1=rint(a+b*x1);
/* limit to our range! */
if(*y0>1023)*y0=1023;
if(*y1>1023)*y1=1023;
if(*y0<0)*y0=0;
if(*y1<0)*y1=0;
return 0;
}else{
*y0=0;
*y1=0;
return 1;
}
}
}
static int inspect_error(int x0,int x1,int y0,int y1,const float *mask,
const float *mdct,
vorbis_info_floor1 *info){
int dy=y1-y0;
int adx=x1-x0;
int ady=abs(dy);
int base=dy/adx;
int sy=(dy<0?base-1:base+1);
int x=x0;
int y=y0;
int err=0;
int val=vorbis_dBquant(mask+x);
int mse=0;
int n=0;
ady-=abs(base*adx);
mse=(y-val);
mse*=mse;
n++;
if(mdct[x]+info->twofitatten>=mask[x]){
if(y+info->maxover<val)return(1);
if(y-info->maxunder>val)return(1);
}
while(++x<x1){
err=err+ady;
if(err>=adx){
err-=adx;
y+=sy;
}else{
y+=base;
}
val=vorbis_dBquant(mask+x);
mse+=((y-val)*(y-val));
n++;
if(mdct[x]+info->twofitatten>=mask[x]){
if(val){
if(y+info->maxover<val)return(1);
if(y-info->maxunder>val)return(1);
}
}
}
if(info->maxover*info->maxover/n>info->maxerr)return(0);
if(info->maxunder*info->maxunder/n>info->maxerr)return(0);
if(mse/n>info->maxerr)return(1);
return(0);
}
static int post_Y(int *A,int *B,int pos){
if(A[pos]<0)
return B[pos];
if(B[pos]<0)
return A[pos];
return (A[pos]+B[pos])>>1;
}
int *floor1_fit(vorbis_block *vb,vorbis_look_floor1 *look,
const float *logmdct, /* in */
const float *logmask){
long i,j;
vorbis_info_floor1 *info=look->vi;
long n=look->n;
long posts=look->posts;
long nonzero=0;
lsfit_acc fits[VIF_POSIT+1];
int fit_valueA[VIF_POSIT+2]; /* index by range list position */
int fit_valueB[VIF_POSIT+2]; /* index by range list position */
int loneighbor[VIF_POSIT+2]; /* sorted index of range list position (+2) */
int hineighbor[VIF_POSIT+2];
int *output=NULL;
int memo[VIF_POSIT+2];
for(i=0;i<posts;i++)fit_valueA[i]=-200; /* mark all unused */
for(i=0;i<posts;i++)fit_valueB[i]=-200; /* mark all unused */
for(i=0;i<posts;i++)loneighbor[i]=0; /* 0 for the implicit 0 post */
for(i=0;i<posts;i++)hineighbor[i]=1; /* 1 for the implicit post at n */
for(i=0;i<posts;i++)memo[i]=-1; /* no neighbor yet */
/* quantize the relevant floor points and collect them into line fit
structures (one per minimal division) at the same time */
if(posts==0){
nonzero+=accumulate_fit(logmask,logmdct,0,n,fits,n,info);
}else{
for(i=0;i<posts-1;i++)
nonzero+=accumulate_fit(logmask,logmdct,look->sorted_index[i],
look->sorted_index[i+1],fits+i,
n,info);
}
if(nonzero){
/* start by fitting the implicit base case.... */
int y0=-200;
int y1=-200;
fit_line(fits,posts-1,&y0,&y1,info);
fit_valueA[0]=y0;
fit_valueB[0]=y0;
fit_valueB[1]=y1;
fit_valueA[1]=y1;
/* Non degenerate case */
/* start progressive splitting. This is a greedy, non-optimal
algorithm, but simple and close enough to the best
answer. */
for(i=2;i<posts;i++){
int sortpos=look->reverse_index[i];
int ln=loneighbor[sortpos];
int hn=hineighbor[sortpos];
/* eliminate repeat searches of a particular range with a memo */
if(memo[ln]!=hn){
/* haven't performed this error search yet */
int lsortpos=look->reverse_index[ln];
int hsortpos=look->reverse_index[hn];
memo[ln]=hn;
{
/* A note: we want to bound/minimize *local*, not global, error */
int lx=info->postlist[ln];
int hx=info->postlist[hn];
int ly=post_Y(fit_valueA,fit_valueB,ln);
int hy=post_Y(fit_valueA,fit_valueB,hn);
if(ly==-1 || hy==-1){
exit(1);
}
if(inspect_error(lx,hx,ly,hy,logmask,logmdct,info)){
/* outside error bounds/begin search area. Split it. */
int ly0=-200;
int ly1=-200;
int hy0=-200;
int hy1=-200;
int ret0=fit_line(fits+lsortpos,sortpos-lsortpos,&ly0,&ly1,info);
int ret1=fit_line(fits+sortpos,hsortpos-sortpos,&hy0,&hy1,info);
if(ret0){
ly0=ly;
ly1=hy0;
}
if(ret1){
hy0=ly1;
hy1=hy;
}
if(ret0 && ret1){
fit_valueA[i]=-200;
fit_valueB[i]=-200;
}else{
/* store new edge values */
fit_valueB[ln]=ly0;
if(ln==0)fit_valueA[ln]=ly0;
fit_valueA[i]=ly1;
fit_valueB[i]=hy0;
fit_valueA[hn]=hy1;
if(hn==1)fit_valueB[hn]=hy1;
if(ly1>=0 || hy0>=0){
/* store new neighbor values */
for(j=sortpos-1;j>=0;j--)
if(hineighbor[j]==hn)
hineighbor[j]=i;
else
break;
for(j=sortpos+1;j<posts;j++)
if(loneighbor[j]==ln)
loneighbor[j]=i;
else
break;
}
}
}else{
fit_valueA[i]=-200;
fit_valueB[i]=-200;
}
}
}
}
output=_vorbis_block_alloc(vb,sizeof(*output)*posts);
output[0]=post_Y(fit_valueA,fit_valueB,0);
output[1]=post_Y(fit_valueA,fit_valueB,1);
/* fill in posts marked as not using a fit; we will zero
back out to 'unused' when encoding them so long as curve
interpolation doesn't force them into use */
for(i=2;i<posts;i++){
int ln=look->loneighbor[i-2];
int hn=look->hineighbor[i-2];
int x0=info->postlist[ln];
int x1=info->postlist[hn];
int y0=output[ln];
int y1=output[hn];
int predicted=render_point(x0,x1,y0,y1,info->postlist[i]);
int vx=post_Y(fit_valueA,fit_valueB,i);
if(vx>=0 && predicted!=vx){
output[i]=vx;
}else{
output[i]= predicted|0x8000;
}
}
}
return(output);
}
int *floor1_interpolate_fit(vorbis_block *vb,vorbis_look_floor1 *look,
int *A,int *B,
int del){
long i;
long posts=look->posts;
int *output=NULL;
if(A && B){
output=_vorbis_block_alloc(vb,sizeof(*output)*posts);
/* overly simpleminded--- look again post 1.2 */
for(i=0;i<posts;i++){
output[i]=((65536-del)*(A[i]&0x7fff)+del*(B[i]&0x7fff)+32768)>>16;
if(A[i]&0x8000 && B[i]&0x8000)output[i]|=0x8000;
}
}
return(output);
}
int floor1_encode(oggpack_buffer *opb,vorbis_block *vb,
vorbis_look_floor1 *look,
int *post,int *ilogmask){
long i,j;
vorbis_info_floor1 *info=look->vi;
long posts=look->posts;
codec_setup_info *ci=vb->vd->vi->codec_setup;
int out[VIF_POSIT+2];
static_codebook **sbooks=ci->book_param;
codebook *books=ci->fullbooks;
/* quantize values to multiplier spec */
if(post){
for(i=0;i<posts;i++){
int val=post[i]&0x7fff;
switch(info->mult){
case 1: /* 1024 -> 256 */
val>>=2;
break;
case 2: /* 1024 -> 128 */
val>>=3;
break;
case 3: /* 1024 -> 86 */
val/=12;
break;
case 4: /* 1024 -> 64 */
val>>=4;
break;
}
post[i]=val | (post[i]&0x8000);
}
out[0]=post[0];
out[1]=post[1];
/* find prediction values for each post and subtract them */
for(i=2;i<posts;i++){
int ln=look->loneighbor[i-2];
int hn=look->hineighbor[i-2];
int x0=info->postlist[ln];
int x1=info->postlist[hn];
int y0=post[ln];
int y1=post[hn];
int predicted=render_point(x0,x1,y0,y1,info->postlist[i]);
if((post[i]&0x8000) || (predicted==post[i])){
post[i]=predicted|0x8000; /* in case there was roundoff jitter
in interpolation */
out[i]=0;
}else{
int headroom=(look->quant_q-predicted<predicted?
look->quant_q-predicted:predicted);
int val=post[i]-predicted;
/* at this point the 'deviation' value is in the range +/- max
range, but the real, unique range can always be mapped to
only [0-maxrange). So we want to wrap the deviation into
this limited range, but do it in the way that least screws
an essentially gaussian probability distribution. */
if(val<0)
if(val<-headroom)
val=headroom-val-1;
else
val=-1-(val<<1);
else
if(val>=headroom)
val= val+headroom;
else
val<<=1;
out[i]=val;
post[ln]&=0x7fff;
post[hn]&=0x7fff;
}
}
/* we have everything we need. pack it out */
/* mark nontrivial floor */
oggpack_write(opb,1,1);
/* beginning/end post */
look->frames++;
look->postbits+=ov_ilog(look->quant_q-1)*2;
oggpack_write(opb,out[0],ov_ilog(look->quant_q-1));
oggpack_write(opb,out[1],ov_ilog(look->quant_q-1));
/* partition by partition */
for(i=0,j=2;i<info->partitions;i++){
int class=info->partitionclass[i];
int cdim=info->class_dim[class];
int csubbits=info->class_subs[class];
int csub=1<<csubbits;
int bookas[8]={0,0,0,0,0,0,0,0};
int cval=0;
int cshift=0;
int k,l;
/* generate the partition's first stage cascade value */
if(csubbits){
int maxval[8]={0,0,0,0,0,0,0,0}; /* gcc's static analysis
issues a warning without
initialization */
for(k=0;k<csub;k++){
int booknum=info->class_subbook[class][k];
if(booknum<0){
maxval[k]=1;
}else{
maxval[k]=sbooks[info->class_subbook[class][k]]->entries;
}
}
for(k=0;k<cdim;k++){
for(l=0;l<csub;l++){
int val=out[j+k];
if(val<maxval[l]){
bookas[k]=l;
break;
}
}
cval|= bookas[k]<<cshift;
cshift+=csubbits;
}
/* write it */
look->phrasebits+=
vorbis_book_encode(books+info->class_book[class],cval,opb);
#ifdef TRAIN_FLOOR1
{
FILE *of;
char buffer[80];
sprintf(buffer,"line_%dx%ld_class%d.vqd",
vb->pcmend/2,posts-2,class);
of=fopen(buffer,"a");
fprintf(of,"%d\n",cval);
fclose(of);
}
#endif
}
/* write post values */
for(k=0;k<cdim;k++){
int book=info->class_subbook[class][bookas[k]];
if(book>=0){
/* hack to allow training with 'bad' books */
if(out[j+k]<(books+book)->entries)
look->postbits+=vorbis_book_encode(books+book,
out[j+k],opb);
/*else
fprintf(stderr,"+!");*/
#ifdef TRAIN_FLOOR1
{
FILE *of;
char buffer[80];
sprintf(buffer,"line_%dx%ld_%dsub%d.vqd",
vb->pcmend/2,posts-2,class,bookas[k]);
of=fopen(buffer,"a");
fprintf(of,"%d\n",out[j+k]);
fclose(of);
}
#endif
}
}
j+=cdim;
}
{
/* generate quantized floor equivalent to what we'd unpack in decode */
/* render the lines */
int hx=0;
int lx=0;
int ly=post[0]*info->mult;
int n=ci->blocksizes[vb->W]/2;
for(j=1;j<look->posts;j++){
int current=look->forward_index[j];
int hy=post[current]&0x7fff;
if(hy==post[current]){
hy*=info->mult;
hx=info->postlist[current];
render_line0(n,lx,hx,ly,hy,ilogmask);
lx=hx;
ly=hy;
}
}
for(j=hx;j<vb->pcmend/2;j++)ilogmask[j]=ly; /* be certain */
return(1);
}
}else{
oggpack_write(opb,0,1);
memset(ilogmask,0,vb->pcmend/2*sizeof(*ilogmask));
return(0);
}
}
static void *floor1_inverse1(vorbis_block *vb,vorbis_look_floor *in){
vorbis_look_floor1 *look=(vorbis_look_floor1 *)in;
vorbis_info_floor1 *info=look->vi;
codec_setup_info *ci=vb->vd->vi->codec_setup;
int i,j,k;
codebook *books=ci->fullbooks;
/* unpack wrapped/predicted values from stream */
if(oggpack_read(&vb->opb,1)==1){
int *fit_value=_vorbis_block_alloc(vb,(look->posts)*sizeof(*fit_value));
fit_value[0]=oggpack_read(&vb->opb,ov_ilog(look->quant_q-1));
fit_value[1]=oggpack_read(&vb->opb,ov_ilog(look->quant_q-1));
/* partition by partition */
for(i=0,j=2;i<info->partitions;i++){
int class=info->partitionclass[i];
int cdim=info->class_dim[class];
int csubbits=info->class_subs[class];
int csub=1<<csubbits;
int cval=0;
/* decode the partition's first stage cascade value */
if(csubbits){
cval=vorbis_book_decode(books+info->class_book[class],&vb->opb);
if(cval==-1)goto eop;
}
for(k=0;k<cdim;k++){
int book=info->class_subbook[class][cval&(csub-1)];
cval>>=csubbits;
if(book>=0){
if((fit_value[j+k]=vorbis_book_decode(books+book,&vb->opb))==-1)
goto eop;
}else{
fit_value[j+k]=0;
}
}
j+=cdim;
}
/* unwrap positive values and reconsitute via linear interpolation */
for(i=2;i<look->posts;i++){
int predicted=render_point(info->postlist[look->loneighbor[i-2]],
info->postlist[look->hineighbor[i-2]],
fit_value[look->loneighbor[i-2]],
fit_value[look->hineighbor[i-2]],
info->postlist[i]);
int hiroom=look->quant_q-predicted;
int loroom=predicted;
int room=(hiroom<loroom?hiroom:loroom)<<1;
int val=fit_value[i];
if(val){
if(val>=room){
if(hiroom>loroom){
val = val-loroom;
}else{
val = -1-(val-hiroom);
}
}else{
if(val&1){
val= -((val+1)>>1);
}else{
val>>=1;
}
}
fit_value[i]=(val+predicted)&0x7fff;
fit_value[look->loneighbor[i-2]]&=0x7fff;
fit_value[look->hineighbor[i-2]]&=0x7fff;
}else{
fit_value[i]=predicted|0x8000;
}
}
return(fit_value);
}
eop:
return(NULL);
}
static int floor1_inverse2(vorbis_block *vb,vorbis_look_floor *in,void *memo,
float *out){
vorbis_look_floor1 *look=(vorbis_look_floor1 *)in;
vorbis_info_floor1 *info=look->vi;
codec_setup_info *ci=vb->vd->vi->codec_setup;
int n=ci->blocksizes[vb->W]/2;
int j;
if(memo){
/* render the lines */
int *fit_value=(int *)memo;
int hx=0;
int lx=0;
int ly=fit_value[0]*info->mult;
/* guard lookup against out-of-range values */
ly=(ly<0?0:ly>255?255:ly);
for(j=1;j<look->posts;j++){
int current=look->forward_index[j];
int hy=fit_value[current]&0x7fff;
if(hy==fit_value[current]){
hx=info->postlist[current];
hy*=info->mult;
/* guard lookup against out-of-range values */
hy=(hy<0?0:hy>255?255:hy);
render_line(n,lx,hx,ly,hy,out);
lx=hx;
ly=hy;
}
}
for(j=hx;j<n;j++)out[j]*=FLOOR1_fromdB_LOOKUP[ly]; /* be certain */
return(1);
}
memset(out,0,sizeof(*out)*n);
return(0);
}
/* export hooks */
const vorbis_func_floor floor1_exportbundle={
&floor1_pack,&floor1_unpack,&floor1_look,&floor1_free_info,
&floor1_free_look,&floor1_inverse1,&floor1_inverse2
};
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