X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=lib%2Ffloor0.c;h=99a083b06918c6cf8ab64d8df1894be573ed2aa7;hb=1b0aa969c7bebfad37c5d2dea4055c50c766aa96;hp=fb9e1badac9587c2c8545e141df974b110e2057d;hpb=f894be654bb8b1a79e7a49cecdb8580064f831f1;p=platform%2Fupstream%2Flibvorbis.git diff --git a/lib/floor0.c b/lib/floor0.c index fb9e1ba..99a083b 100644 --- a/lib/floor0.c +++ b/lib/floor0.c @@ -1,245 +1,221 @@ /******************************************************************** * * - * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY * - * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. * - * PLEASE READ THESE TERMS DISTRIBUTING. * + * 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 OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000 * - * by Monty and The XIPHOPHORUS Company * - * http://www.xiph.org/ * + * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 * + * by the Xiph.Org Foundation http://www.xiph.org/ * * * ******************************************************************** function: floor backend 0 implementation - last mod: $Id: floor0.c,v 1.12 2000/03/10 13:21:18 xiphmont Exp $ + last mod: $Id$ ********************************************************************/ #include #include #include +#include #include "vorbis/codec.h" -#include "bitwise.h" +#include "codec_internal.h" #include "registry.h" #include "lpc.h" #include "lsp.h" -#include "bookinternal.h" +#include "codebook.h" #include "scales.h" #include "misc.h" +#include "os.h" + +#include "misc.h" +#include typedef struct { - long n; - long m; - - double ampscale; - double ampvals; + int ln; + int m; + int **linearmap; + int n[2]; vorbis_info_floor0 *vi; - lpc_lookup lpclook; + + long bits; + long frames; } vorbis_look_floor0; -static void free_info(vorbis_info_floor *i){ - if(i){ - memset(i,0,sizeof(vorbis_info_floor0)); - free(i); + +/***********************************************/ + +static void floor0_free_info(vorbis_info_floor *i){ + vorbis_info_floor0 *info=(vorbis_info_floor0 *)i; + if(info){ + memset(info,0,sizeof(*info)); + _ogg_free(info); } } -static void free_look(vorbis_look_floor *i){ +static void floor0_free_look(vorbis_look_floor *i){ vorbis_look_floor0 *look=(vorbis_look_floor0 *)i; - if(i){ - lpc_clear(&look->lpclook); - memset(look,0,sizeof(vorbis_look_floor0)); - free(look); + if(look){ + + if(look->linearmap){ + + if(look->linearmap[0])_ogg_free(look->linearmap[0]); + if(look->linearmap[1])_ogg_free(look->linearmap[1]); + + _ogg_free(look->linearmap); + } + memset(look,0,sizeof(*look)); + _ogg_free(look); } } -static void pack (vorbis_info_floor *i,oggpack_buffer *opb){ - vorbis_info_floor0 *info=(vorbis_info_floor0 *)i; +static vorbis_info_floor *floor0_unpack (vorbis_info *vi,oggpack_buffer *opb){ + codec_setup_info *ci=vi->codec_setup; int j; - _oggpack_write(opb,info->order,8); - _oggpack_write(opb,info->rate,16); - _oggpack_write(opb,info->barkmap,16); - _oggpack_write(opb,info->ampbits,6); - _oggpack_write(opb,info->ampdB,8); - _oggpack_write(opb,info->stages-1,4); - for(j=0;jstages;j++) - _oggpack_write(opb,info->books[j],8); -} -static vorbis_info_floor *unpack (vorbis_info *vi,oggpack_buffer *opb){ - int j; - vorbis_info_floor0 *info=malloc(sizeof(vorbis_info_floor0)); - info->order=_oggpack_read(opb,8); - info->rate=_oggpack_read(opb,16); - info->barkmap=_oggpack_read(opb,16); - info->ampbits=_oggpack_read(opb,6); - info->ampdB=_oggpack_read(opb,8); - info->stages=_oggpack_read(opb,4)+1; - + vorbis_info_floor0 *info=_ogg_malloc(sizeof(*info)); + info->order=oggpack_read(opb,8); + info->rate=oggpack_read(opb,16); + info->barkmap=oggpack_read(opb,16); + info->ampbits=oggpack_read(opb,6); + info->ampdB=oggpack_read(opb,8); + info->numbooks=oggpack_read(opb,4)+1; + if(info->order<1)goto err_out; if(info->rate<1)goto err_out; if(info->barkmap<1)goto err_out; - if(info->stages<1)goto err_out; + if(info->numbooks<1)goto err_out; - for(j=0;jstages;j++){ - info->books[j]=_oggpack_read(opb,8); - if(info->books[j]<0 || info->books[j]>=vi->books)goto err_out; + for(j=0;jnumbooks;j++){ + info->books[j]=oggpack_read(opb,8); + if(info->books[j]<0 || info->books[j]>=ci->books)goto err_out; + if(ci->book_param[info->books[j]]->maptype==0)goto err_out; + if(ci->book_param[info->books[j]]->dim<1)goto err_out; } - return(info); + return(info); + err_out: - free_info(info); + floor0_free_info(info); return(NULL); } -static vorbis_look_floor *look (vorbis_dsp_state *vd,vorbis_info_mode *mi, - vorbis_info_floor *i){ - vorbis_info *vi=vd->vi; +/* initialize Bark scale and normalization lookups. We could do this + with static tables, but Vorbis allows a number of possible + combinations, so it's best to do it computationally. + + The below is authoritative in terms of defining scale mapping. + Note that the scale depends on the sampling rate as well as the + linear block and mapping sizes */ + +static void floor0_map_lazy_init(vorbis_block *vb, + vorbis_info_floor *infoX, + vorbis_look_floor0 *look){ + if(!look->linearmap[vb->W]){ + vorbis_dsp_state *vd=vb->vd; + vorbis_info *vi=vd->vi; + codec_setup_info *ci=vi->codec_setup; + vorbis_info_floor0 *info=(vorbis_info_floor0 *)infoX; + int W=vb->W; + int n=ci->blocksizes[W]/2,j; + + /* we choose a scaling constant so that: + floor(bark(rate/2-1)*C)=mapped-1 + floor(bark(rate/2)*C)=mapped */ + float scale=look->ln/toBARK(info->rate/2.f); + + /* the mapping from a linear scale to a smaller bark scale is + straightforward. We do *not* make sure that the linear mapping + does not skip bark-scale bins; the decoder simply skips them and + the encoder may do what it wishes in filling them. They're + necessary in some mapping combinations to keep the scale spacing + accurate */ + look->linearmap[W]=_ogg_malloc((n+1)*sizeof(**look->linearmap)); + for(j=0;jrate/2.f)/n*j) + *scale); /* bark numbers represent band edges */ + if(val>=look->ln)val=look->ln-1; /* guard against the approximation */ + look->linearmap[W][j]=val; + } + look->linearmap[W][j]=-1; + look->n[W]=n; + } +} + +static vorbis_look_floor *floor0_look(vorbis_dsp_state *vd, + vorbis_info_floor *i){ vorbis_info_floor0 *info=(vorbis_info_floor0 *)i; - vorbis_look_floor0 *look=malloc(sizeof(vorbis_look_floor0)); + vorbis_look_floor0 *look=_ogg_calloc(1,sizeof(*look)); look->m=info->order; - look->n=vi->blocksizes[mi->blockflag]/2; + look->ln=info->barkmap; look->vi=info; - lpc_init(&look->lpclook,look->n,info->barkmap,info->rate,look->m); + + look->linearmap=_ogg_calloc(2,sizeof(*look->linearmap)); return look; } -#include - -static int forward(vorbis_block *vb,vorbis_look_floor *i, - double *in,double *out){ - long j,k,stage; +static void *floor0_inverse1(vorbis_block *vb,vorbis_look_floor *i){ vorbis_look_floor0 *look=(vorbis_look_floor0 *)i; vorbis_info_floor0 *info=look->vi; - double amp; - long bits=0; - - /* use 'out' as temp storage */ - /* Convert our floor to a set of lpc coefficients */ - amp=sqrt(vorbis_curve_to_lpc(in,out,&look->lpclook)); - - /* amp is in the range 0. to 1. (well, more like .7). Log scale it */ - - /* 0 == 0 dB - (1<ampdB); - long maxval=(1<ampbits)-1; - - long val=todB(amp*ampscale)/info->ampdB*maxval+1; - - if(val<0)val=0; /* likely */ - if(val>maxval)val=maxval; /* not bloody likely */ + int j,k; - _oggpack_write(&vb->opb,val,info->ampbits); - if(val>0) - amp=fromdB((val-.5)/maxval*info->ampdB)/ampscale; - else - amp=0; - } - - if(amp>0){ - double *work=alloca(sizeof(double)*look->m); - - /* LSP <-> LPC is orthogonal and LSP quantizes more stably */ - vorbis_lpc_to_lsp(out,out,look->m); - memcpy(work,out,sizeof(double)*look->m); - -#ifdef TRAIN - { - int j; - FILE *of; - char buffer[80]; - sprintf(buffer,"lsp0coeff_%d.vqd",vb->mode); - of=fopen(buffer,"a"); - for(j=0;jm;j++) - fprintf(of,"%g, ",out[j]); - fprintf(of,"\n"); - fclose(of); - } -#endif - - /* code the spectral envelope, and keep track of the actual - quantized values; we don't want creeping error as each block is - nailed to the last quantized value of the previous block. */ - - /* first stage is a bit different because quantization error must be - handled carefully */ - for(stage=0;stagestages;stage++){ - codebook *b=vb->vd->fullbooks+info->books[stage]; - - if(stage==0){ - double last=0.; - for(j=0;jm;){ - for(k=0;kdim;k++)out[j+k]-=last; - bits+=vorbis_book_encodev(b,out+j,&vb->opb); - for(k=0;kdim;k++,j++){ - out[j]+=last; - work[j]-=out[j]; - } - last=out[j-1]; - } - }else{ - memcpy(out,work,sizeof(double)*look->m); - for(j=0;jm;){ - bits+=vorbis_book_encodev(b,out+j,&vb->opb); - for(k=0;kdim;k++,j++)work[j]-=out[j]; - } + int ampraw=oggpack_read(&vb->opb,info->ampbits); + if(ampraw>0){ /* also handles the -1 out of data case */ + long maxval=(1<ampbits)-1; + float amp=(float)ampraw/maxval*info->ampdB; + int booknum=oggpack_read(&vb->opb,_ilog(info->numbooks)); + + if(booknum!=-1 && booknumnumbooks){ /* be paranoid */ + codec_setup_info *ci=vb->vd->vi->codec_setup; + codebook *b=ci->fullbooks+info->books[booknum]; + float last=0.f; + + /* the additional b->dim is a guard against any possible stack + smash; b->dim is provably more than we can overflow the + vector */ + float *lsp=_vorbis_block_alloc(vb,sizeof(*lsp)*(look->m+b->dim+1)); + + if(vorbis_book_decodev_set(b,lsp,&vb->opb,look->m)==-1)goto eop; + for(j=0;jm;){ + for(k=0;jm && kdim;k++,j++)lsp[j]+=last; + last=lsp[j-1]; } + + lsp[look->m]=amp; + return(lsp); } - /* take the coefficients back to a spectral envelope curve */ - vorbis_lsp_to_lpc(out,out,look->m); - vorbis_lpc_to_curve(out,out,amp,&look->lpclook); - fprintf(stderr,"Encoded %ld LSP coefficients in %ld bits\n",look->m,bits); - return(1); } - - fprintf(stderr,"Encoded %ld LSP coefficients in %ld bits\n",look->m,bits); - - memset(out,0,sizeof(double)*look->n); - return(0); + eop: + return(NULL); } -static int inverse(vorbis_block *vb,vorbis_look_floor *i,double *out){ +static int floor0_inverse2(vorbis_block *vb,vorbis_look_floor *i, + void *memo,float *out){ vorbis_look_floor0 *look=(vorbis_look_floor0 *)i; vorbis_info_floor0 *info=look->vi; - int j,k,stage; - - long ampraw=_oggpack_read(&vb->opb,info->ampbits); - if(ampraw>0){ - long ampscale=fromdB(info->ampdB); - long maxval=(1<ampbits)-1; - double amp=fromdB((ampraw-.5)/maxval*info->ampdB)/ampscale; - - memset(out,0,sizeof(double)*look->m); - for(stage=0;stagestages;stage++){ - codebook *b=vb->vd->fullbooks+info->books[stage]; - for(j=0;jm;j+=b->dim) - vorbis_book_decodev(b,out+j,&vb->opb); - if(stage==0){ - double last=0.; - for(j=0;jm;){ - for(k=0;kdim;k++,j++)out[j]+=last; - last=out[j-1]; - } - } - } - + + floor0_map_lazy_init(vb,info,look); + + if(memo){ + float *lsp=(float *)memo; + float amp=lsp[look->m]; /* take the coefficients back to a spectral envelope curve */ - vorbis_lsp_to_lpc(out,out,look->m); - vorbis_lpc_to_curve(out,out,amp,&look->lpclook); + vorbis_lsp_to_curve(out, + look->linearmap[vb->W], + look->n[vb->W], + look->ln, + lsp,look->m,amp,(float)info->ampdB); return(1); - }else - memset(out,0,sizeof(double)*look->n); + } + memset(out,0,sizeof(*out)*look->n[vb->W]); return(0); } /* export hooks */ -vorbis_func_floor floor0_exportbundle={ - &pack,&unpack,&look,&free_info,&free_look,&forward,&inverse +const vorbis_func_floor floor0_exportbundle={ + NULL,&floor0_unpack,&floor0_look,&floor0_free_info, + &floor0_free_look,&floor0_inverse1,&floor0_inverse2 }; - -