diff options
Diffstat (limited to 'tremor/floor1.c')
| -rw-r--r-- | tremor/floor1.c | 439 |
1 files changed, 0 insertions, 439 deletions
diff --git a/tremor/floor1.c b/tremor/floor1.c deleted file mode 100644 index 963656d631..0000000000 --- a/tremor/floor1.c +++ /dev/null @@ -1,439 +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 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; - - ady-=abs(base*adx); - - d[x]= MULT31_SHIFT15(d[x],FLOOR_fromdB_LOOKUP[y]); - - while(++x<x1){ - 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(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 -}; - |