diff -r 328264029b6e -r f3840de881bd misc/libtremor/tremor/floor1.c
--- a/misc/libtremor/tremor/floor1.c	Tue Jul 23 14:01:23 2013 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,441 +0,0 @@
-/********************************************************************
- *                                                                  *
- * THIS FILE IS PART OF THE OggVorbis 'TREMOR' 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 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002    *
- * 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.h"
-#include "ivorbiscodec.h"
-#include "codec_internal.h"
-#include "registry.h"
-#include "codebook.h"
-#include "misc.h"
-#include "block.h"
-
-#define floor1_rangedB 140 /* floor 1 fixed at -140dB to 0dB range */
-
-typedef struct {
-  int forward_index[VIF_POSIT+2];
-  
-  int hineighbor[VIF_POSIT];
-  int loneighbor[VIF_POSIT];
-  int posts;
-
-  int n;
-  int quant_q;
-  vorbis_info_floor1 *vi;
-
-} vorbis_look_floor1;
-
-/***********************************************/
- 
-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){
-    memset(look,0,sizeof(*look));
-    _ogg_free(look);
-  }
-}
-
-static int ilog(unsigned int v){
-  int ret=0;
-  while(v){
-    ret++;
-    v>>=1;
-  }
-  return(ret);
-}
-
-static vorbis_info_floor *floor1_unpack (vorbis_info *vi,oggpack_buffer *opb){
-  codec_setup_info     *ci=(codec_setup_info *)vi->codec_setup;
-  int j,k,count=0,maxclass=-1,rangebits;
-
-  vorbis_info_floor1 *info=(vorbis_info_floor1 *)_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(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);
-
-  for(j=0,k=0;j<info->partitions;j++){
-    count+=info->class_dim[info->partitionclass[j]]; 
-    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;
-
-  return(info);
-  
- err_out:
-  floor1_free_info(info);
-  return(NULL);
-}
-
-static int icomp(const void *a,const void *b){
-  return(**(int **)a-**(int **)b);
-}
-
-static vorbis_look_floor *floor1_look(vorbis_dsp_state *vd,vorbis_info_mode *mi,
-                              vorbis_info_floor *in){
-
-  int *sortpointer[VIF_POSIT+2];
-  vorbis_info_floor1 *info=(vorbis_info_floor1 *)in;
-  vorbis_look_floor1 *look=(vorbis_look_floor1 *)_ogg_calloc(1,sizeof(*look));
-  int i,j,n=0;
-
-  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;
-  
-  /* 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);
-  }
-}
-
-#ifdef _LOW_ACCURACY_
-#  define XdB(n) ((((n)>>8)+1)>>1)
-#else
-#  define XdB(n) (n)
-#endif
-
-static const ogg_int32_t FLOOR_fromdB_LOOKUP[256]={
-  XdB(0x000000e5), XdB(0x000000f4), XdB(0x00000103), XdB(0x00000114),
-  XdB(0x00000126), XdB(0x00000139), XdB(0x0000014e), XdB(0x00000163),
-  XdB(0x0000017a), XdB(0x00000193), XdB(0x000001ad), XdB(0x000001c9),
-  XdB(0x000001e7), XdB(0x00000206), XdB(0x00000228), XdB(0x0000024c),
-  XdB(0x00000272), XdB(0x0000029b), XdB(0x000002c6), XdB(0x000002f4),
-  XdB(0x00000326), XdB(0x0000035a), XdB(0x00000392), XdB(0x000003cd),
-  XdB(0x0000040c), XdB(0x00000450), XdB(0x00000497), XdB(0x000004e4),
-  XdB(0x00000535), XdB(0x0000058c), XdB(0x000005e8), XdB(0x0000064a),
-  XdB(0x000006b3), XdB(0x00000722), XdB(0x00000799), XdB(0x00000818),
-  XdB(0x0000089e), XdB(0x0000092e), XdB(0x000009c6), XdB(0x00000a69),
-  XdB(0x00000b16), XdB(0x00000bcf), XdB(0x00000c93), XdB(0x00000d64),
-  XdB(0x00000e43), XdB(0x00000f30), XdB(0x0000102d), XdB(0x0000113a),
-  XdB(0x00001258), XdB(0x0000138a), XdB(0x000014cf), XdB(0x00001629),
-  XdB(0x0000179a), XdB(0x00001922), XdB(0x00001ac4), XdB(0x00001c82),
-  XdB(0x00001e5c), XdB(0x00002055), XdB(0x0000226f), XdB(0x000024ac),
-  XdB(0x0000270e), XdB(0x00002997), XdB(0x00002c4b), XdB(0x00002f2c),
-  XdB(0x0000323d), XdB(0x00003581), XdB(0x000038fb), XdB(0x00003caf),
-  XdB(0x000040a0), XdB(0x000044d3), XdB(0x0000494c), XdB(0x00004e10),
-  XdB(0x00005323), XdB(0x0000588a), XdB(0x00005e4b), XdB(0x0000646b),
-  XdB(0x00006af2), XdB(0x000071e5), XdB(0x0000794c), XdB(0x0000812e),
-  XdB(0x00008993), XdB(0x00009283), XdB(0x00009c09), XdB(0x0000a62d),
-  XdB(0x0000b0f9), XdB(0x0000bc79), XdB(0x0000c8b9), XdB(0x0000d5c4),
-  XdB(0x0000e3a9), XdB(0x0000f274), XdB(0x00010235), XdB(0x000112fd),
-  XdB(0x000124dc), XdB(0x000137e4), XdB(0x00014c29), XdB(0x000161bf),
-  XdB(0x000178bc), XdB(0x00019137), XdB(0x0001ab4a), XdB(0x0001c70e),
-  XdB(0x0001e4a1), XdB(0x0002041f), XdB(0x000225aa), XdB(0x00024962),
-  XdB(0x00026f6d), XdB(0x000297f0), XdB(0x0002c316), XdB(0x0002f109),
-  XdB(0x000321f9), XdB(0x00035616), XdB(0x00038d97), XdB(0x0003c8b4),
-  XdB(0x000407a7), XdB(0x00044ab2), XdB(0x00049218), XdB(0x0004de23),
-  XdB(0x00052f1e), XdB(0x0005855c), XdB(0x0005e135), XdB(0x00064306),
-  XdB(0x0006ab33), XdB(0x00071a24), XdB(0x0007904b), XdB(0x00080e20),
-  XdB(0x00089422), XdB(0x000922da), XdB(0x0009bad8), XdB(0x000a5cb6),
-  XdB(0x000b091a), XdB(0x000bc0b1), XdB(0x000c8436), XdB(0x000d5471),
-  XdB(0x000e3233), XdB(0x000f1e5f), XdB(0x001019e4), XdB(0x001125c1),
-  XdB(0x00124306), XdB(0x001372d5), XdB(0x0014b663), XdB(0x00160ef7),
-  XdB(0x00177df0), XdB(0x001904c1), XdB(0x001aa4f9), XdB(0x001c603d),
-  XdB(0x001e384f), XdB(0x00202f0f), XdB(0x0022467a), XdB(0x002480b1),
-  XdB(0x0026dff7), XdB(0x002966b3), XdB(0x002c1776), XdB(0x002ef4fc),
-  XdB(0x0032022d), XdB(0x00354222), XdB(0x0038b828), XdB(0x003c67c2),
-  XdB(0x004054ae), XdB(0x004482e8), XdB(0x0048f6af), XdB(0x004db488),
-  XdB(0x0052c142), XdB(0x005821ff), XdB(0x005ddc33), XdB(0x0063f5b0),
-  XdB(0x006a74a7), XdB(0x00715faf), XdB(0x0078bdce), XdB(0x0080967f),
-  XdB(0x0088f1ba), XdB(0x0091d7f9), XdB(0x009b5247), XdB(0x00a56a41),
-  XdB(0x00b02a27), XdB(0x00bb9ce2), XdB(0x00c7ce12), XdB(0x00d4ca17),
-  XdB(0x00e29e20), XdB(0x00f15835), XdB(0x0101074b), XdB(0x0111bb4e),
-  XdB(0x01238531), XdB(0x01367704), XdB(0x014aa402), XdB(0x016020a7),
-  XdB(0x017702c3), XdB(0x018f6190), XdB(0x01a955cb), XdB(0x01c4f9cf),
-  XdB(0x01e269a8), XdB(0x0201c33b), XdB(0x0223265a), XdB(0x0246b4ea),
-  XdB(0x026c9302), XdB(0x0294e716), XdB(0x02bfda13), XdB(0x02ed9793),
-  XdB(0x031e4e09), XdB(0x03522ee4), XdB(0x03896ed0), XdB(0x03c445e2),
-  XdB(0x0402efd6), XdB(0x0445ac4b), XdB(0x048cbefc), XdB(0x04d87013),
-  XdB(0x05290c67), XdB(0x057ee5ca), XdB(0x05da5364), XdB(0x063bb204),
-  XdB(0x06a36485), XdB(0x0711d42b), XdB(0x0787710e), XdB(0x0804b299),
-  XdB(0x088a17ef), XdB(0x0918287e), XdB(0x09af747c), XdB(0x0a50957e),
-  XdB(0x0afc2f19), XdB(0x0bb2ef7f), XdB(0x0c759034), XdB(0x0d44d6ca),
-  XdB(0x0e2195bc), XdB(0x0f0cad0d), XdB(0x10070b62), XdB(0x1111aeea),
-  XdB(0x122da66c), XdB(0x135c120f), XdB(0x149e24d9), XdB(0x15f525b1),
-  XdB(0x176270e3), XdB(0x18e7794b), XdB(0x1a85c9ae), XdB(0x1c3f06d1),
-  XdB(0x1e14f07d), XdB(0x200963d7), XdB(0x221e5ccd), XdB(0x2455f870),
-  XdB(0x26b2770b), XdB(0x29363e2b), XdB(0x2be3db5c), XdB(0x2ebe06b6),
-  XdB(0x31c7a55b), XdB(0x3503ccd4), XdB(0x3875c5aa), XdB(0x3c210f44),
-  XdB(0x4009632b), XdB(0x4432b8cf), XdB(0x48a149bc), XdB(0x4d59959e),
-  XdB(0x52606733), XdB(0x57bad899), XdB(0x5d6e593a), XdB(0x6380b298),
-  XdB(0x69f80e9a), XdB(0x70dafda8), XdB(0x78307d76), XdB(0x7fffffff),
-};
-  
-static void render_line(int n, int x0,int x1,int y0,int y1,ogg_int32_t *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;
-
-  if(n>x1)n=x1;
-  ady-=abs(base*adx);
-
-  if(x<n)
-    d[x]= MULT31_SHIFT15(d[x],FLOOR_fromdB_LOOKUP[y]);
-
-  while(++x<n){
-    err=err+ady;
-    if(err>=adx){
-      err-=adx;
-      y+=sy;
-    }else{
-      y+=base;
-    }
-    d[x]= MULT31_SHIFT15(d[x],FLOOR_fromdB_LOOKUP[y]);
-  }
-}
-
-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=(codec_setup_info *)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=(int *)_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 */
-    /* partition by partition */
-    for(i=0,j=2;i<info->partitions;i++){
-      int classv=info->partitionclass[i];
-      int cdim=info->class_dim[classv];
-      int csubbits=info->class_subs[classv];
-      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[classv],&vb->opb);
-
-	if(cval==-1)goto eop;
-      }
-
-      for(k=0;k<cdim;k++){
-	int book=info->class_subbook[classv][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,
-			  ogg_int32_t *out){
-  vorbis_look_floor1 *look=(vorbis_look_floor1 *)in;
-  vorbis_info_floor1 *info=look->vi;
-
-  codec_setup_info   *ci=(codec_setup_info *)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(n,lx,hx,ly,hy,out);
-	
-	lx=hx;
-	ly=hy;
-      }
-    }
-    for(j=hx;j<n;j++)out[j]*=ly; /* be certain */    
-    return(1);
-  }
-  memset(out,0,sizeof(*out)*n);
-  return(0);
-}
-
-/* export hooks */
-vorbis_func_floor floor1_exportbundle={
-  &floor1_unpack,&floor1_look,&floor1_free_info,
-  &floor1_free_look,&floor1_inverse1,&floor1_inverse2
-};
-