1091 lines
28 KiB
C
1091 lines
28 KiB
C
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
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* by the XIPHOPHORUS Company http://www.xiph.org/ *
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* *
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********************************************************************
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function: floor backend 1 implementation
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last mod: $Id: floor1.c 3 2005-06-02 18:16:43Z vspader $
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********************************************************************/
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <ogg/ogg.h>
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#include "vorbis/codec.h"
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#include "codec_internal.h"
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#include "registry.h"
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#include "codebook.h"
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#include "misc.h"
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#include "scales.h"
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#include <stdio.h>
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#define floor1_rangedB 140 /* floor 1 fixed at -140dB to 0dB range */
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typedef struct {
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int sorted_index[VIF_POSIT+2];
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int forward_index[VIF_POSIT+2];
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int reverse_index[VIF_POSIT+2];
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int hineighbor[VIF_POSIT];
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int loneighbor[VIF_POSIT];
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int posts;
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int n;
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int quant_q;
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vorbis_info_floor1 *vi;
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long phrasebits;
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long postbits;
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long frames;
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} vorbis_look_floor1;
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typedef struct lsfit_acc{
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long x0;
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long x1;
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long xa;
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long ya;
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long x2a;
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long y2a;
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long xya;
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long an;
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} lsfit_acc;
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/***********************************************/
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static void floor1_free_info(vorbis_info_floor *i){
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vorbis_info_floor1 *info=(vorbis_info_floor1 *)i;
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if(info){
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memset(info,0,sizeof(*info));
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_ogg_free(info);
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}
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}
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static void floor1_free_look(vorbis_look_floor *i){
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vorbis_look_floor1 *look=(vorbis_look_floor1 *)i;
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if(look){
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/*fprintf(stderr,"floor 1 bit usage %f:%f (%f total)\n",
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(float)look->phrasebits/look->frames,
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(float)look->postbits/look->frames,
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(float)(look->postbits+look->phrasebits)/look->frames);*/
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memset(look,0,sizeof(*look));
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_ogg_free(look);
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}
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}
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static int ilog(unsigned int v){
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int ret=0;
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while(v){
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ret++;
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v>>=1;
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}
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return(ret);
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}
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static int ilog2(unsigned int v){
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int ret=0;
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if(v)--v;
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while(v){
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ret++;
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v>>=1;
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}
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return(ret);
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}
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static void floor1_pack (vorbis_info_floor *i,oggpack_buffer *opb){
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vorbis_info_floor1 *info=(vorbis_info_floor1 *)i;
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int j,k;
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int count=0;
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int rangebits;
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int maxposit=info->postlist[1];
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int maxclass=-1;
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/* save out partitions */
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oggpack_write(opb,info->partitions,5); /* only 0 to 31 legal */
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for(j=0;j<info->partitions;j++){
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oggpack_write(opb,info->partitionclass[j],4); /* only 0 to 15 legal */
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if(maxclass<info->partitionclass[j])maxclass=info->partitionclass[j];
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}
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/* save out partition classes */
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for(j=0;j<maxclass+1;j++){
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oggpack_write(opb,info->class_dim[j]-1,3); /* 1 to 8 */
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oggpack_write(opb,info->class_subs[j],2); /* 0 to 3 */
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if(info->class_subs[j])oggpack_write(opb,info->class_book[j],8);
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for(k=0;k<(1<<info->class_subs[j]);k++)
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oggpack_write(opb,info->class_subbook[j][k]+1,8);
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}
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/* save out the post list */
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oggpack_write(opb,info->mult-1,2); /* only 1,2,3,4 legal now */
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oggpack_write(opb,ilog2(maxposit),4);
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rangebits=ilog2(maxposit);
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for(j=0,k=0;j<info->partitions;j++){
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count+=info->class_dim[info->partitionclass[j]];
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for(;k<count;k++)
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oggpack_write(opb,info->postlist[k+2],rangebits);
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}
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}
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static vorbis_info_floor *floor1_unpack (vorbis_info *vi,oggpack_buffer *opb){
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codec_setup_info *ci=vi->codec_setup;
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int j,k,count=0,maxclass=-1,rangebits;
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vorbis_info_floor1 *info=_ogg_calloc(1,sizeof(*info));
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/* read partitions */
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info->partitions=oggpack_read(opb,5); /* only 0 to 31 legal */
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for(j=0;j<info->partitions;j++){
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info->partitionclass[j]=oggpack_read(opb,4); /* only 0 to 15 legal */
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if(maxclass<info->partitionclass[j])maxclass=info->partitionclass[j];
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}
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/* read partition classes */
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for(j=0;j<maxclass+1;j++){
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info->class_dim[j]=oggpack_read(opb,3)+1; /* 1 to 8 */
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info->class_subs[j]=oggpack_read(opb,2); /* 0,1,2,3 bits */
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if(info->class_subs[j]<0)
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goto err_out;
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if(info->class_subs[j])info->class_book[j]=oggpack_read(opb,8);
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if(info->class_book[j]<0 || info->class_book[j]>=ci->books)
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goto err_out;
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for(k=0;k<(1<<info->class_subs[j]);k++){
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info->class_subbook[j][k]=oggpack_read(opb,8)-1;
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if(info->class_subbook[j][k]<-1 || info->class_subbook[j][k]>=ci->books)
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goto err_out;
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}
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}
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/* read the post list */
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info->mult=oggpack_read(opb,2)+1; /* only 1,2,3,4 legal now */
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rangebits=oggpack_read(opb,4);
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for(j=0,k=0;j<info->partitions;j++){
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count+=info->class_dim[info->partitionclass[j]];
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for(;k<count;k++){
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int t=info->postlist[k+2]=oggpack_read(opb,rangebits);
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if(t<0 || t>=(1<<rangebits))
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goto err_out;
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}
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}
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info->postlist[0]=0;
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info->postlist[1]=1<<rangebits;
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return(info);
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err_out:
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floor1_free_info(info);
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return(NULL);
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}
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static int icomp(const void *a,const void *b){
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return(**(int **)a-**(int **)b);
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}
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static vorbis_look_floor *floor1_look(vorbis_dsp_state *vd,
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vorbis_info_floor *in){
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int *sortpointer[VIF_POSIT+2];
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vorbis_info_floor1 *info=(vorbis_info_floor1 *)in;
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vorbis_look_floor1 *look=_ogg_calloc(1,sizeof(*look));
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int i,j,n=0;
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look->vi=info;
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look->n=info->postlist[1];
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/* we drop each position value in-between already decoded values,
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and use linear interpolation to predict each new value past the
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edges. The positions are read in the order of the position
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list... we precompute the bounding positions in the lookup. Of
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course, the neighbors can change (if a position is declined), but
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this is an initial mapping */
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for(i=0;i<info->partitions;i++)n+=info->class_dim[info->partitionclass[i]];
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n+=2;
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look->posts=n;
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/* also store a sorted position index */
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for(i=0;i<n;i++)sortpointer[i]=info->postlist+i;
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qsort(sortpointer,n,sizeof(*sortpointer),icomp);
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/* points from sort order back to range number */
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for(i=0;i<n;i++)look->forward_index[i]=sortpointer[i]-info->postlist;
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/* points from range order to sorted position */
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for(i=0;i<n;i++)look->reverse_index[look->forward_index[i]]=i;
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/* we actually need the post values too */
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for(i=0;i<n;i++)look->sorted_index[i]=info->postlist[look->forward_index[i]];
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/* quantize values to multiplier spec */
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switch(info->mult){
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case 1: /* 1024 -> 256 */
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look->quant_q=256;
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break;
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case 2: /* 1024 -> 128 */
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look->quant_q=128;
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break;
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case 3: /* 1024 -> 86 */
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look->quant_q=86;
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break;
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case 4: /* 1024 -> 64 */
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look->quant_q=64;
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break;
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}
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/* discover our neighbors for decode where we don't use fit flags
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(that would push the neighbors outward) */
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for(i=0;i<n-2;i++){
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int lo=0;
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int hi=1;
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int lx=0;
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int hx=look->n;
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int currentx=info->postlist[i+2];
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for(j=0;j<i+2;j++){
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int x=info->postlist[j];
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if(x>lx && x<currentx){
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lo=j;
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lx=x;
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}
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if(x<hx && x>currentx){
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hi=j;
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hx=x;
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}
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}
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look->loneighbor[i]=lo;
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look->hineighbor[i]=hi;
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}
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return(look);
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}
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static int render_point(int x0,int x1,int y0,int y1,int x){
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y0&=0x7fff; /* mask off flag */
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y1&=0x7fff;
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{
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int dy=y1-y0;
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int adx=x1-x0;
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int ady=abs(dy);
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int err=ady*(x-x0);
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int off=err/adx;
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if(dy<0)return(y0-off);
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return(y0+off);
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}
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}
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static int vorbis_dBquant(const float *x){
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int i= *x*7.3142857f+1023.5f;
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if(i>1023)return(1023);
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if(i<0)return(0);
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return i;
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}
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static float FLOOR1_fromdB_LOOKUP[256]={
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1.0649863e-07F, 1.1341951e-07F, 1.2079015e-07F, 1.2863978e-07F,
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1.3699951e-07F, 1.4590251e-07F, 1.5538408e-07F, 1.6548181e-07F,
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1.7623575e-07F, 1.8768855e-07F, 1.9988561e-07F, 2.128753e-07F,
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2.2670913e-07F, 2.4144197e-07F, 2.5713223e-07F, 2.7384213e-07F,
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2.9163793e-07F, 3.1059021e-07F, 3.3077411e-07F, 3.5226968e-07F,
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3.7516214e-07F, 3.9954229e-07F, 4.2550680e-07F, 4.5315863e-07F,
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4.8260743e-07F, 5.1396998e-07F, 5.4737065e-07F, 5.8294187e-07F,
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6.2082472e-07F, 6.6116941e-07F, 7.0413592e-07F, 7.4989464e-07F,
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7.9862701e-07F, 8.5052630e-07F, 9.0579828e-07F, 9.6466216e-07F,
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1.0273513e-06F, 1.0941144e-06F, 1.1652161e-06F, 1.2409384e-06F,
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1.3215816e-06F, 1.4074654e-06F, 1.4989305e-06F, 1.5963394e-06F,
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1.7000785e-06F, 1.8105592e-06F, 1.9282195e-06F, 2.0535261e-06F,
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2.1869758e-06F, 2.3290978e-06F, 2.4804557e-06F, 2.6416497e-06F,
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2.8133190e-06F, 2.9961443e-06F, 3.1908506e-06F, 3.3982101e-06F,
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3.6190449e-06F, 3.8542308e-06F, 4.1047004e-06F, 4.3714470e-06F,
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4.6555282e-06F, 4.9580707e-06F, 5.2802740e-06F, 5.6234160e-06F,
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5.9888572e-06F, 6.3780469e-06F, 6.7925283e-06F, 7.2339451e-06F,
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7.7040476e-06F, 8.2047000e-06F, 8.7378876e-06F, 9.3057248e-06F,
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9.9104632e-06F, 1.0554501e-05F, 1.1240392e-05F, 1.1970856e-05F,
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1.2748789e-05F, 1.3577278e-05F, 1.4459606e-05F, 1.5399272e-05F,
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1.6400004e-05F, 1.7465768e-05F, 1.8600792e-05F, 1.9809576e-05F,
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2.1096914e-05F, 2.2467911e-05F, 2.3928002e-05F, 2.5482978e-05F,
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2.7139006e-05F, 2.8902651e-05F, 3.0780908e-05F, 3.2781225e-05F,
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3.4911534e-05F, 3.7180282e-05F, 3.9596466e-05F, 4.2169667e-05F,
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4.4910090e-05F, 4.7828601e-05F, 5.0936773e-05F, 5.4246931e-05F,
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5.7772202e-05F, 6.1526565e-05F, 6.5524908e-05F, 6.9783085e-05F,
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7.4317983e-05F, 7.9147585e-05F, 8.4291040e-05F, 8.9768747e-05F,
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9.5602426e-05F, 0.00010181521F, 0.00010843174F, 0.00011547824F,
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0.00012298267F, 0.00013097477F, 0.00013948625F, 0.00014855085F,
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0.00015820453F, 0.00016848555F, 0.00017943469F, 0.00019109536F,
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0.00020351382F, 0.00021673929F, 0.00023082423F, 0.00024582449F,
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0.00026179955F, 0.00027881276F, 0.00029693158F, 0.00031622787F,
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0.00033677814F, 0.00035866388F, 0.00038197188F, 0.00040679456F,
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0.00043323036F, 0.00046138411F, 0.00049136745F, 0.00052329927F,
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0.00055730621F, 0.00059352311F, 0.00063209358F, 0.00067317058F,
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0.00071691700F, 0.00076350630F, 0.00081312324F, 0.00086596457F,
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0.00092223983F, 0.00098217216F, 0.0010459992F, 0.0011139742F,
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0.0011863665F, 0.0012634633F, 0.0013455702F, 0.0014330129F,
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0.0015261382F, 0.0016253153F, 0.0017309374F, 0.0018434235F,
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0.0019632195F, 0.0020908006F, 0.0022266726F, 0.0023713743F,
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0.0025254795F, 0.0026895994F, 0.0028643847F, 0.0030505286F,
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|
0.0032487691F, 0.0034598925F, 0.0036847358F, 0.0039241906F,
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|
0.0041792066F, 0.0044507950F, 0.0047400328F, 0.0050480668F,
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|
0.0053761186F, 0.0057254891F, 0.0060975636F, 0.0064938176F,
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|
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,
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|
};
|
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|
|
static void render_line(int x0,int x1,int y0,int y1,float *d){
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int dy=y1-y0;
|
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int adx=x1-x0;
|
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int ady=abs(dy);
|
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int base=dy/adx;
|
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int sy=(dy<0?base-1:base+1);
|
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int x=x0;
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int y=y0;
|
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int err=0;
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|
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ady-=abs(base*adx);
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|
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d[x]*=FLOOR1_fromdB_LOOKUP[y];
|
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while(++x<x1){
|
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err=err+ady;
|
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if(err>=adx){
|
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err-=adx;
|
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y+=sy;
|
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}else{
|
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y+=base;
|
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}
|
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d[x]*=FLOOR1_fromdB_LOOKUP[y];
|
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}
|
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}
|
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|
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static void render_line0(int x0,int x1,int y0,int y1,int *d){
|
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int dy=y1-y0;
|
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int adx=x1-x0;
|
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int ady=abs(dy);
|
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int base=dy/adx;
|
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int sy=(dy<0?base-1:base+1);
|
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int x=x0;
|
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int y=y0;
|
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int err=0;
|
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|
|
ady-=abs(base*adx);
|
|
|
|
d[x]=y;
|
|
while(++x<x1){
|
|
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 quantized=vorbis_dBquant(flr+x0);
|
|
|
|
long 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++;
|
|
}
|
|
}
|
|
}
|
|
|
|
xb+=xa;
|
|
yb+=ya;
|
|
x2b+=x2a;
|
|
y2b+=y2a;
|
|
xyb+=xya;
|
|
nb+=na;
|
|
|
|
/* weight toward the actually used frequencies if we meet the threshhold */
|
|
{
|
|
int weight=nb*info->twofitweight/(na+1);
|
|
|
|
a->xa=xa*weight+xb;
|
|
a->ya=ya*weight+yb;
|
|
a->x2a=x2a*weight+x2b;
|
|
a->y2a=y2a*weight+y2b;
|
|
a->xya=xya*weight+xyb;
|
|
a->an=na*weight+nb;
|
|
}
|
|
|
|
return(na);
|
|
}
|
|
|
|
static void fit_line(lsfit_acc *a,int fits,int *y0,int *y1){
|
|
long x=0,y=0,x2=0,y2=0,xy=0,an=0,i;
|
|
long x0=a[0].x0;
|
|
long x1=a[fits-1].x1;
|
|
|
|
for(i=0;i<fits;i++){
|
|
x+=a[i].xa;
|
|
y+=a[i].ya;
|
|
x2+=a[i].x2a;
|
|
y2+=a[i].y2a;
|
|
xy+=a[i].xya;
|
|
an+=a[i].an;
|
|
}
|
|
|
|
if(*y0>=0){
|
|
x+= x0;
|
|
y+= *y0;
|
|
x2+= x0 * x0;
|
|
y2+= *y0 * *y0;
|
|
xy+= *y0 * x0;
|
|
an++;
|
|
}
|
|
|
|
if(*y1>=0){
|
|
x+= x1;
|
|
y+= *y1;
|
|
x2+= x1 * x1;
|
|
y2+= *y1 * *y1;
|
|
xy+= *y1 * x1;
|
|
an++;
|
|
}
|
|
|
|
if(an){
|
|
/* need 64 bit multiplies, which C doesn't give portably as int */
|
|
double fx=x;
|
|
double fy=y;
|
|
double fx2=x2;
|
|
double fxy=xy;
|
|
double denom=1./(an*fx2-fx*fx);
|
|
double a=(fy*fx2-fxy*fx)*denom;
|
|
double b=(an*fxy-fx*fy)*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;
|
|
|
|
}else{
|
|
*y0=0;
|
|
*y1=0;
|
|
}
|
|
}
|
|
|
|
/*static void fit_line_point(lsfit_acc *a,int fits,int *y0,int *y1){
|
|
long y=0;
|
|
int i;
|
|
|
|
for(i=0;i<fits && y==0;i++)
|
|
y+=a[i].ya;
|
|
|
|
*y0=*y1=y;
|
|
}*/
|
|
|
|
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;
|
|
}
|
|
|
|
static int seq=0;
|
|
|
|
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);
|
|
|
|
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;
|
|
fit_line(fits+lsortpos,sortpos-lsortpos,&ly0,&ly1);
|
|
fit_line(fits+sortpos,hsortpos-sortpos,&hy0,&hy1);
|
|
|
|
/* 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);
|
|
|
|
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 n=look->n;
|
|
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;
|
|
static long seq=0;
|
|
|
|
/* 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+=ilog(look->quant_q-1)*2;
|
|
oggpack_write(opb,out[0],ilog(look->quant_q-1));
|
|
oggpack_write(opb,out[1],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];
|
|
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;
|
|
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(lx,hx,ly,hy,ilogmask);
|
|
|
|
lx=hx;
|
|
ly=hy;
|
|
}
|
|
}
|
|
for(j=hx;j<vb->pcmend/2;j++)ilogmask[j]=ly; /* be certain */
|
|
seq++;
|
|
return(1);
|
|
}
|
|
}else{
|
|
oggpack_write(opb,0,1);
|
|
memset(ilogmask,0,vb->pcmend/2*sizeof(*ilogmask));
|
|
seq++;
|
|
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,ilog(look->quant_q-1));
|
|
fit_value[1]=oggpack_read(&vb->opb,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;
|
|
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;
|
|
for(j=1;j<look->posts;j++){
|
|
int current=look->forward_index[j];
|
|
int hy=fit_value[current]&0x7fff;
|
|
if(hy==fit_value[current]){
|
|
|
|
hy*=info->mult;
|
|
hx=info->postlist[current];
|
|
|
|
render_line(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 */
|
|
vorbis_func_floor floor1_exportbundle={
|
|
&floor1_pack,&floor1_unpack,&floor1_look,&floor1_free_info,
|
|
&floor1_free_look,&floor1_inverse1,&floor1_inverse2
|
|
};
|
|
|
|
|