mirror of
https://github.com/Q3Rally-Team/q3rally.git
synced 2024-12-15 14:50:58 +00:00
0d5fb492cd
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
562 lines
15 KiB
C
562 lines
15 KiB
C
/********************************************************************
|
|
* *
|
|
* 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 1994-2009 *
|
|
* by the Xiph.Org Foundation http://www.xiph.org/ *
|
|
* *
|
|
********************************************************************
|
|
|
|
function: normalized modified discrete cosine transform
|
|
power of two length transform only [64 <= n ]
|
|
|
|
Original algorithm adapted long ago from _The use of multirate filter
|
|
banks for coding of high quality digital audio_, by T. Sporer,
|
|
K. Brandenburg and B. Edler, collection of the European Signal
|
|
Processing Conference (EUSIPCO), Amsterdam, June 1992, Vol.1, pp
|
|
211-214
|
|
|
|
The below code implements an algorithm that no longer looks much like
|
|
that presented in the paper, but the basic structure remains if you
|
|
dig deep enough to see it.
|
|
|
|
This module DOES NOT INCLUDE code to generate/apply the window
|
|
function. Everybody has their own weird favorite including me... I
|
|
happen to like the properties of y=sin(.5PI*sin^2(x)), but others may
|
|
vehemently disagree.
|
|
|
|
********************************************************************/
|
|
|
|
/* this can also be run as an integer transform by uncommenting a
|
|
define in mdct.h; the integerization is a first pass and although
|
|
it's likely stable for Vorbis, the dynamic range is constrained and
|
|
roundoff isn't done (so it's noisy). Consider it functional, but
|
|
only a starting point. There's no point on a machine with an FPU */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
#include "vorbis/codec.h"
|
|
#include "mdct.h"
|
|
#include "os.h"
|
|
#include "misc.h"
|
|
|
|
/* build lookups for trig functions; also pre-figure scaling and
|
|
some window function algebra. */
|
|
|
|
void mdct_init(mdct_lookup *lookup,int n){
|
|
int *bitrev=_ogg_malloc(sizeof(*bitrev)*(n/4));
|
|
DATA_TYPE *T=_ogg_malloc(sizeof(*T)*(n+n/4));
|
|
|
|
int i;
|
|
int n2=n>>1;
|
|
int log2n=lookup->log2n=rint(log((float)n)/log(2.f));
|
|
lookup->n=n;
|
|
lookup->trig=T;
|
|
lookup->bitrev=bitrev;
|
|
|
|
/* trig lookups... */
|
|
|
|
for(i=0;i<n/4;i++){
|
|
T[i*2]=FLOAT_CONV(cos((M_PI/n)*(4*i)));
|
|
T[i*2+1]=FLOAT_CONV(-sin((M_PI/n)*(4*i)));
|
|
T[n2+i*2]=FLOAT_CONV(cos((M_PI/(2*n))*(2*i+1)));
|
|
T[n2+i*2+1]=FLOAT_CONV(sin((M_PI/(2*n))*(2*i+1)));
|
|
}
|
|
for(i=0;i<n/8;i++){
|
|
T[n+i*2]=FLOAT_CONV(cos((M_PI/n)*(4*i+2))*.5);
|
|
T[n+i*2+1]=FLOAT_CONV(-sin((M_PI/n)*(4*i+2))*.5);
|
|
}
|
|
|
|
/* bitreverse lookup... */
|
|
|
|
{
|
|
int mask=(1<<(log2n-1))-1,i,j;
|
|
int msb=1<<(log2n-2);
|
|
for(i=0;i<n/8;i++){
|
|
int acc=0;
|
|
for(j=0;msb>>j;j++)
|
|
if((msb>>j)&i)acc|=1<<j;
|
|
bitrev[i*2]=((~acc)&mask)-1;
|
|
bitrev[i*2+1]=acc;
|
|
|
|
}
|
|
}
|
|
lookup->scale=FLOAT_CONV(4.f/n);
|
|
}
|
|
|
|
/* 8 point butterfly (in place, 4 register) */
|
|
STIN void mdct_butterfly_8(DATA_TYPE *x){
|
|
REG_TYPE r0 = x[6] + x[2];
|
|
REG_TYPE r1 = x[6] - x[2];
|
|
REG_TYPE r2 = x[4] + x[0];
|
|
REG_TYPE r3 = x[4] - x[0];
|
|
|
|
x[6] = r0 + r2;
|
|
x[4] = r0 - r2;
|
|
|
|
r0 = x[5] - x[1];
|
|
r2 = x[7] - x[3];
|
|
x[0] = r1 + r0;
|
|
x[2] = r1 - r0;
|
|
|
|
r0 = x[5] + x[1];
|
|
r1 = x[7] + x[3];
|
|
x[3] = r2 + r3;
|
|
x[1] = r2 - r3;
|
|
x[7] = r1 + r0;
|
|
x[5] = r1 - r0;
|
|
|
|
}
|
|
|
|
/* 16 point butterfly (in place, 4 register) */
|
|
STIN void mdct_butterfly_16(DATA_TYPE *x){
|
|
REG_TYPE r0 = x[1] - x[9];
|
|
REG_TYPE r1 = x[0] - x[8];
|
|
|
|
x[8] += x[0];
|
|
x[9] += x[1];
|
|
x[0] = MULT_NORM((r0 + r1) * cPI2_8);
|
|
x[1] = MULT_NORM((r0 - r1) * cPI2_8);
|
|
|
|
r0 = x[3] - x[11];
|
|
r1 = x[10] - x[2];
|
|
x[10] += x[2];
|
|
x[11] += x[3];
|
|
x[2] = r0;
|
|
x[3] = r1;
|
|
|
|
r0 = x[12] - x[4];
|
|
r1 = x[13] - x[5];
|
|
x[12] += x[4];
|
|
x[13] += x[5];
|
|
x[4] = MULT_NORM((r0 - r1) * cPI2_8);
|
|
x[5] = MULT_NORM((r0 + r1) * cPI2_8);
|
|
|
|
r0 = x[14] - x[6];
|
|
r1 = x[15] - x[7];
|
|
x[14] += x[6];
|
|
x[15] += x[7];
|
|
x[6] = r0;
|
|
x[7] = r1;
|
|
|
|
mdct_butterfly_8(x);
|
|
mdct_butterfly_8(x+8);
|
|
}
|
|
|
|
/* 32 point butterfly (in place, 4 register) */
|
|
STIN void mdct_butterfly_32(DATA_TYPE *x){
|
|
REG_TYPE r0 = x[30] - x[14];
|
|
REG_TYPE r1 = x[31] - x[15];
|
|
|
|
x[30] += x[14];
|
|
x[31] += x[15];
|
|
x[14] = r0;
|
|
x[15] = r1;
|
|
|
|
r0 = x[28] - x[12];
|
|
r1 = x[29] - x[13];
|
|
x[28] += x[12];
|
|
x[29] += x[13];
|
|
x[12] = MULT_NORM( r0 * cPI1_8 - r1 * cPI3_8 );
|
|
x[13] = MULT_NORM( r0 * cPI3_8 + r1 * cPI1_8 );
|
|
|
|
r0 = x[26] - x[10];
|
|
r1 = x[27] - x[11];
|
|
x[26] += x[10];
|
|
x[27] += x[11];
|
|
x[10] = MULT_NORM(( r0 - r1 ) * cPI2_8);
|
|
x[11] = MULT_NORM(( r0 + r1 ) * cPI2_8);
|
|
|
|
r0 = x[24] - x[8];
|
|
r1 = x[25] - x[9];
|
|
x[24] += x[8];
|
|
x[25] += x[9];
|
|
x[8] = MULT_NORM( r0 * cPI3_8 - r1 * cPI1_8 );
|
|
x[9] = MULT_NORM( r1 * cPI3_8 + r0 * cPI1_8 );
|
|
|
|
r0 = x[22] - x[6];
|
|
r1 = x[7] - x[23];
|
|
x[22] += x[6];
|
|
x[23] += x[7];
|
|
x[6] = r1;
|
|
x[7] = r0;
|
|
|
|
r0 = x[4] - x[20];
|
|
r1 = x[5] - x[21];
|
|
x[20] += x[4];
|
|
x[21] += x[5];
|
|
x[4] = MULT_NORM( r1 * cPI1_8 + r0 * cPI3_8 );
|
|
x[5] = MULT_NORM( r1 * cPI3_8 - r0 * cPI1_8 );
|
|
|
|
r0 = x[2] - x[18];
|
|
r1 = x[3] - x[19];
|
|
x[18] += x[2];
|
|
x[19] += x[3];
|
|
x[2] = MULT_NORM(( r1 + r0 ) * cPI2_8);
|
|
x[3] = MULT_NORM(( r1 - r0 ) * cPI2_8);
|
|
|
|
r0 = x[0] - x[16];
|
|
r1 = x[1] - x[17];
|
|
x[16] += x[0];
|
|
x[17] += x[1];
|
|
x[0] = MULT_NORM( r1 * cPI3_8 + r0 * cPI1_8 );
|
|
x[1] = MULT_NORM( r1 * cPI1_8 - r0 * cPI3_8 );
|
|
|
|
mdct_butterfly_16(x);
|
|
mdct_butterfly_16(x+16);
|
|
|
|
}
|
|
|
|
/* N point first stage butterfly (in place, 2 register) */
|
|
STIN void mdct_butterfly_first(DATA_TYPE *T,
|
|
DATA_TYPE *x,
|
|
int points){
|
|
|
|
DATA_TYPE *x1 = x + points - 8;
|
|
DATA_TYPE *x2 = x + (points>>1) - 8;
|
|
REG_TYPE r0;
|
|
REG_TYPE r1;
|
|
|
|
do{
|
|
|
|
r0 = x1[6] - x2[6];
|
|
r1 = x1[7] - x2[7];
|
|
x1[6] += x2[6];
|
|
x1[7] += x2[7];
|
|
x2[6] = MULT_NORM(r1 * T[1] + r0 * T[0]);
|
|
x2[7] = MULT_NORM(r1 * T[0] - r0 * T[1]);
|
|
|
|
r0 = x1[4] - x2[4];
|
|
r1 = x1[5] - x2[5];
|
|
x1[4] += x2[4];
|
|
x1[5] += x2[5];
|
|
x2[4] = MULT_NORM(r1 * T[5] + r0 * T[4]);
|
|
x2[5] = MULT_NORM(r1 * T[4] - r0 * T[5]);
|
|
|
|
r0 = x1[2] - x2[2];
|
|
r1 = x1[3] - x2[3];
|
|
x1[2] += x2[2];
|
|
x1[3] += x2[3];
|
|
x2[2] = MULT_NORM(r1 * T[9] + r0 * T[8]);
|
|
x2[3] = MULT_NORM(r1 * T[8] - r0 * T[9]);
|
|
|
|
r0 = x1[0] - x2[0];
|
|
r1 = x1[1] - x2[1];
|
|
x1[0] += x2[0];
|
|
x1[1] += x2[1];
|
|
x2[0] = MULT_NORM(r1 * T[13] + r0 * T[12]);
|
|
x2[1] = MULT_NORM(r1 * T[12] - r0 * T[13]);
|
|
|
|
x1-=8;
|
|
x2-=8;
|
|
T+=16;
|
|
|
|
}while(x2>=x);
|
|
}
|
|
|
|
/* N/stage point generic N stage butterfly (in place, 2 register) */
|
|
STIN void mdct_butterfly_generic(DATA_TYPE *T,
|
|
DATA_TYPE *x,
|
|
int points,
|
|
int trigint){
|
|
|
|
DATA_TYPE *x1 = x + points - 8;
|
|
DATA_TYPE *x2 = x + (points>>1) - 8;
|
|
REG_TYPE r0;
|
|
REG_TYPE r1;
|
|
|
|
do{
|
|
|
|
r0 = x1[6] - x2[6];
|
|
r1 = x1[7] - x2[7];
|
|
x1[6] += x2[6];
|
|
x1[7] += x2[7];
|
|
x2[6] = MULT_NORM(r1 * T[1] + r0 * T[0]);
|
|
x2[7] = MULT_NORM(r1 * T[0] - r0 * T[1]);
|
|
|
|
T+=trigint;
|
|
|
|
r0 = x1[4] - x2[4];
|
|
r1 = x1[5] - x2[5];
|
|
x1[4] += x2[4];
|
|
x1[5] += x2[5];
|
|
x2[4] = MULT_NORM(r1 * T[1] + r0 * T[0]);
|
|
x2[5] = MULT_NORM(r1 * T[0] - r0 * T[1]);
|
|
|
|
T+=trigint;
|
|
|
|
r0 = x1[2] - x2[2];
|
|
r1 = x1[3] - x2[3];
|
|
x1[2] += x2[2];
|
|
x1[3] += x2[3];
|
|
x2[2] = MULT_NORM(r1 * T[1] + r0 * T[0]);
|
|
x2[3] = MULT_NORM(r1 * T[0] - r0 * T[1]);
|
|
|
|
T+=trigint;
|
|
|
|
r0 = x1[0] - x2[0];
|
|
r1 = x1[1] - x2[1];
|
|
x1[0] += x2[0];
|
|
x1[1] += x2[1];
|
|
x2[0] = MULT_NORM(r1 * T[1] + r0 * T[0]);
|
|
x2[1] = MULT_NORM(r1 * T[0] - r0 * T[1]);
|
|
|
|
T+=trigint;
|
|
x1-=8;
|
|
x2-=8;
|
|
|
|
}while(x2>=x);
|
|
}
|
|
|
|
STIN void mdct_butterflies(mdct_lookup *init,
|
|
DATA_TYPE *x,
|
|
int points){
|
|
|
|
DATA_TYPE *T=init->trig;
|
|
int stages=init->log2n-5;
|
|
int i,j;
|
|
|
|
if(--stages>0){
|
|
mdct_butterfly_first(T,x,points);
|
|
}
|
|
|
|
for(i=1;--stages>0;i++){
|
|
for(j=0;j<(1<<i);j++)
|
|
mdct_butterfly_generic(T,x+(points>>i)*j,points>>i,4<<i);
|
|
}
|
|
|
|
for(j=0;j<points;j+=32)
|
|
mdct_butterfly_32(x+j);
|
|
|
|
}
|
|
|
|
void mdct_clear(mdct_lookup *l){
|
|
if(l){
|
|
if(l->trig)_ogg_free(l->trig);
|
|
if(l->bitrev)_ogg_free(l->bitrev);
|
|
memset(l,0,sizeof(*l));
|
|
}
|
|
}
|
|
|
|
STIN void mdct_bitreverse(mdct_lookup *init,
|
|
DATA_TYPE *x){
|
|
int n = init->n;
|
|
int *bit = init->bitrev;
|
|
DATA_TYPE *w0 = x;
|
|
DATA_TYPE *w1 = x = w0+(n>>1);
|
|
DATA_TYPE *T = init->trig+n;
|
|
|
|
do{
|
|
DATA_TYPE *x0 = x+bit[0];
|
|
DATA_TYPE *x1 = x+bit[1];
|
|
|
|
REG_TYPE r0 = x0[1] - x1[1];
|
|
REG_TYPE r1 = x0[0] + x1[0];
|
|
REG_TYPE r2 = MULT_NORM(r1 * T[0] + r0 * T[1]);
|
|
REG_TYPE r3 = MULT_NORM(r1 * T[1] - r0 * T[0]);
|
|
|
|
w1 -= 4;
|
|
|
|
r0 = HALVE(x0[1] + x1[1]);
|
|
r1 = HALVE(x0[0] - x1[0]);
|
|
|
|
w0[0] = r0 + r2;
|
|
w1[2] = r0 - r2;
|
|
w0[1] = r1 + r3;
|
|
w1[3] = r3 - r1;
|
|
|
|
x0 = x+bit[2];
|
|
x1 = x+bit[3];
|
|
|
|
r0 = x0[1] - x1[1];
|
|
r1 = x0[0] + x1[0];
|
|
r2 = MULT_NORM(r1 * T[2] + r0 * T[3]);
|
|
r3 = MULT_NORM(r1 * T[3] - r0 * T[2]);
|
|
|
|
r0 = HALVE(x0[1] + x1[1]);
|
|
r1 = HALVE(x0[0] - x1[0]);
|
|
|
|
w0[2] = r0 + r2;
|
|
w1[0] = r0 - r2;
|
|
w0[3] = r1 + r3;
|
|
w1[1] = r3 - r1;
|
|
|
|
T += 4;
|
|
bit += 4;
|
|
w0 += 4;
|
|
|
|
}while(w0<w1);
|
|
}
|
|
|
|
void mdct_backward(mdct_lookup *init, DATA_TYPE *in, DATA_TYPE *out){
|
|
int n=init->n;
|
|
int n2=n>>1;
|
|
int n4=n>>2;
|
|
|
|
/* rotate */
|
|
|
|
DATA_TYPE *iX = in+n2-7;
|
|
DATA_TYPE *oX = out+n2+n4;
|
|
DATA_TYPE *T = init->trig+n4;
|
|
|
|
do{
|
|
oX -= 4;
|
|
oX[0] = MULT_NORM(-iX[2] * T[3] - iX[0] * T[2]);
|
|
oX[1] = MULT_NORM (iX[0] * T[3] - iX[2] * T[2]);
|
|
oX[2] = MULT_NORM(-iX[6] * T[1] - iX[4] * T[0]);
|
|
oX[3] = MULT_NORM (iX[4] * T[1] - iX[6] * T[0]);
|
|
iX -= 8;
|
|
T += 4;
|
|
}while(iX>=in);
|
|
|
|
iX = in+n2-8;
|
|
oX = out+n2+n4;
|
|
T = init->trig+n4;
|
|
|
|
do{
|
|
T -= 4;
|
|
oX[0] = MULT_NORM (iX[4] * T[3] + iX[6] * T[2]);
|
|
oX[1] = MULT_NORM (iX[4] * T[2] - iX[6] * T[3]);
|
|
oX[2] = MULT_NORM (iX[0] * T[1] + iX[2] * T[0]);
|
|
oX[3] = MULT_NORM (iX[0] * T[0] - iX[2] * T[1]);
|
|
iX -= 8;
|
|
oX += 4;
|
|
}while(iX>=in);
|
|
|
|
mdct_butterflies(init,out+n2,n2);
|
|
mdct_bitreverse(init,out);
|
|
|
|
/* roatate + window */
|
|
|
|
{
|
|
DATA_TYPE *oX1=out+n2+n4;
|
|
DATA_TYPE *oX2=out+n2+n4;
|
|
DATA_TYPE *iX =out;
|
|
T =init->trig+n2;
|
|
|
|
do{
|
|
oX1-=4;
|
|
|
|
oX1[3] = MULT_NORM (iX[0] * T[1] - iX[1] * T[0]);
|
|
oX2[0] = -MULT_NORM (iX[0] * T[0] + iX[1] * T[1]);
|
|
|
|
oX1[2] = MULT_NORM (iX[2] * T[3] - iX[3] * T[2]);
|
|
oX2[1] = -MULT_NORM (iX[2] * T[2] + iX[3] * T[3]);
|
|
|
|
oX1[1] = MULT_NORM (iX[4] * T[5] - iX[5] * T[4]);
|
|
oX2[2] = -MULT_NORM (iX[4] * T[4] + iX[5] * T[5]);
|
|
|
|
oX1[0] = MULT_NORM (iX[6] * T[7] - iX[7] * T[6]);
|
|
oX2[3] = -MULT_NORM (iX[6] * T[6] + iX[7] * T[7]);
|
|
|
|
oX2+=4;
|
|
iX += 8;
|
|
T += 8;
|
|
}while(iX<oX1);
|
|
|
|
iX=out+n2+n4;
|
|
oX1=out+n4;
|
|
oX2=oX1;
|
|
|
|
do{
|
|
oX1-=4;
|
|
iX-=4;
|
|
|
|
oX2[0] = -(oX1[3] = iX[3]);
|
|
oX2[1] = -(oX1[2] = iX[2]);
|
|
oX2[2] = -(oX1[1] = iX[1]);
|
|
oX2[3] = -(oX1[0] = iX[0]);
|
|
|
|
oX2+=4;
|
|
}while(oX2<iX);
|
|
|
|
iX=out+n2+n4;
|
|
oX1=out+n2+n4;
|
|
oX2=out+n2;
|
|
do{
|
|
oX1-=4;
|
|
oX1[0]= iX[3];
|
|
oX1[1]= iX[2];
|
|
oX1[2]= iX[1];
|
|
oX1[3]= iX[0];
|
|
iX+=4;
|
|
}while(oX1>oX2);
|
|
}
|
|
}
|
|
|
|
void mdct_forward(mdct_lookup *init, DATA_TYPE *in, DATA_TYPE *out){
|
|
int n=init->n;
|
|
int n2=n>>1;
|
|
int n4=n>>2;
|
|
int n8=n>>3;
|
|
DATA_TYPE *w=alloca(n*sizeof(*w)); /* forward needs working space */
|
|
DATA_TYPE *w2=w+n2;
|
|
|
|
/* rotate */
|
|
|
|
/* window + rotate + step 1 */
|
|
|
|
REG_TYPE r0;
|
|
REG_TYPE r1;
|
|
DATA_TYPE *x0=in+n2+n4;
|
|
DATA_TYPE *x1=x0+1;
|
|
DATA_TYPE *T=init->trig+n2;
|
|
|
|
int i=0;
|
|
|
|
for(i=0;i<n8;i+=2){
|
|
x0 -=4;
|
|
T-=2;
|
|
r0= x0[2] + x1[0];
|
|
r1= x0[0] + x1[2];
|
|
w2[i]= MULT_NORM(r1*T[1] + r0*T[0]);
|
|
w2[i+1]= MULT_NORM(r1*T[0] - r0*T[1]);
|
|
x1 +=4;
|
|
}
|
|
|
|
x1=in+1;
|
|
|
|
for(;i<n2-n8;i+=2){
|
|
T-=2;
|
|
x0 -=4;
|
|
r0= x0[2] - x1[0];
|
|
r1= x0[0] - x1[2];
|
|
w2[i]= MULT_NORM(r1*T[1] + r0*T[0]);
|
|
w2[i+1]= MULT_NORM(r1*T[0] - r0*T[1]);
|
|
x1 +=4;
|
|
}
|
|
|
|
x0=in+n;
|
|
|
|
for(;i<n2;i+=2){
|
|
T-=2;
|
|
x0 -=4;
|
|
r0= -x0[2] - x1[0];
|
|
r1= -x0[0] - x1[2];
|
|
w2[i]= MULT_NORM(r1*T[1] + r0*T[0]);
|
|
w2[i+1]= MULT_NORM(r1*T[0] - r0*T[1]);
|
|
x1 +=4;
|
|
}
|
|
|
|
|
|
mdct_butterflies(init,w+n2,n2);
|
|
mdct_bitreverse(init,w);
|
|
|
|
/* roatate + window */
|
|
|
|
T=init->trig+n2;
|
|
x0=out+n2;
|
|
|
|
for(i=0;i<n4;i++){
|
|
x0--;
|
|
out[i] =MULT_NORM((w[0]*T[0]+w[1]*T[1])*init->scale);
|
|
x0[0] =MULT_NORM((w[0]*T[1]-w[1]*T[0])*init->scale);
|
|
w+=2;
|
|
T+=2;
|
|
}
|
|
}
|