/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
- * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
- * THE GNU LESSER/LIBRARY PUBLIC LICENSE, WHICH IS INCLUDED WITH *
- * THIS SOURCE. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
+ * 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 1994-2000 *
- * by Monty <monty@xiph.org> and the XIPHOPHORUS Company *
- * http://www.xiph.org/ *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2015 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: floor backend 0 implementation
- last mod: $Id: floor0.c,v 1.27 2000/11/07 09:51:42 xiphmont Exp $
+ last mod: $Id$
********************************************************************/
#include <stdio.h>
typedef struct {
- long n;
int ln;
int m;
- int *linearmap;
+ int **linearmap;
+ int n[2];
vorbis_info_floor0 *vi;
- lpc_lookup lpclook;
- float *lsp_look;
+ long bits;
+ long frames;
} vorbis_look_floor0;
-/* infrastructure for finding fit */
-static long _f0_fit(codebook *book,
- float *orig,
- float *workfit,
- int cursor){
- int dim=book->dim;
- float norm,base=0.;
- int i,best=0;
- float *lsp=workfit+cursor;
-
- if(cursor)base=workfit[cursor-1];
- norm=orig[cursor+dim-1]-base;
-
- for(i=0;i<dim;i++)
- lsp[i]=(orig[i+cursor]-base);
- best=_best(book,lsp,1);
-
- memcpy(lsp,book->valuelist+best*dim,dim*sizeof(float));
- for(i=0;i<dim;i++)
- lsp[i]+=base;
- return(best);
-}
/***********************************************/
-static vorbis_info_floor *floor0_copy_info (vorbis_info_floor *i){
- vorbis_info_floor0 *info=(vorbis_info_floor0 *)i;
- vorbis_info_floor0 *ret=_ogg_malloc(sizeof(vorbis_info_floor0));
- memcpy(ret,info,sizeof(vorbis_info_floor0));
- return(ret);
-}
-
static void floor0_free_info(vorbis_info_floor *i){
- if(i){
- memset(i,0,sizeof(vorbis_info_floor0));
- free(i);
+ vorbis_info_floor0 *info=(vorbis_info_floor0 *)i;
+ if(info){
+ memset(info,0,sizeof(*info));
+ _ogg_free(info);
}
}
static void floor0_free_look(vorbis_look_floor *i){
vorbis_look_floor0 *look=(vorbis_look_floor0 *)i;
- if(i){
- if(look->linearmap)free(look->linearmap);
- if(look->lsp_look)free(look->lsp_look);
- lpc_clear(&look->lpclook);
- memset(look,0,sizeof(vorbis_look_floor0));
- free(look);
- }
-}
+ if(look){
-static void floor0_pack (vorbis_info_floor *i,oggpack_buffer *opb){
- vorbis_info_floor0 *info=(vorbis_info_floor0 *)i;
- 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->numbooks-1,4);
- for(j=0;j<info->numbooks;j++)
- oggpack_write(opb,info->books[j],8);
+ 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 vorbis_info_floor *floor0_unpack (vorbis_info *vi,oggpack_buffer *opb){
codec_setup_info *ci=vi->codec_setup;
int j;
- vorbis_info_floor0 *info=_ogg_malloc(sizeof(vorbis_info_floor0));
+ 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->numbooks<1)goto err_out;
-
+
for(j=0;j<info->numbooks;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);
Note that the scale depends on the sampling rate as well as the
linear block and mapping sizes */
-static vorbis_look_floor *floor0_look (vorbis_dsp_state *vd,vorbis_info_mode *mi,
- vorbis_info_floor *i){
- int j;
- float scale;
- vorbis_info *vi=vd->vi;
- codec_setup_info *ci=vi->codec_setup;
+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;j<n;j++){
+ int val=floor( toBARK((info->rate/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=_ogg_calloc(1,sizeof(vorbis_look_floor0));
+ vorbis_look_floor0 *look=_ogg_calloc(1,sizeof(*look));
+
+ (void)vd;
+
look->m=info->order;
- look->n=ci->blocksizes[mi->blockflag]/2;
look->ln=info->barkmap;
look->vi=info;
- if(vd->analysisp)
- lpc_init(&look->lpclook,look->ln,look->m);
-
- /* we choose a scaling constant so that:
- floor(bark(rate/2-1)*C)=mapped-1
- floor(bark(rate/2)*C)=mapped */
- scale=look->ln/toBARK(info->rate/2.);
-
- /* 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=_ogg_malloc((look->n+1)*sizeof(int));
- for(j=0;j<look->n;j++){
- int val=floor( toBARK((info->rate/2.)/look->n*j)
- *scale); /* bark numbers represent band edges */
- if(val>look->ln)val=look->ln; /* guard against the approximation */
- look->linearmap[j]=val;
- }
- look->linearmap[j]=-1;
-
- look->lsp_look=_ogg_malloc(look->ln*sizeof(float));
- for(j=0;j<look->ln;j++)
- look->lsp_look[j]=2*cos(M_PI/look->ln*j);
+ look->linearmap=_ogg_calloc(2,sizeof(*look->linearmap));
return look;
}
-/* less efficient than the decode side (written for clarity). We're
- not bottlenecked here anyway */
-
-float _curve_to_lpc(float *curve,float *lpc,
- vorbis_look_floor0 *l){
- /* map the input curve to a bark-scale curve for encoding */
-
- int mapped=l->ln;
- float *work=alloca(sizeof(float)*mapped);
- int i,j,last=0;
- int bark=0;
-
- memset(work,0,sizeof(float)*mapped);
-
- /* Only the decode side is behavior-specced; for now in the encoder,
- we select the maximum value of each band as representative (this
- helps make sure peaks don't go out of range. In error terms,
- selecting min would make more sense, but the codebook is trained
- numerically, so we don't actually lose. We'd still want to
- use the original curve for error and noise estimation */
-
- for(i=0;i<l->n;i++){
- bark=l->linearmap[i];
- if(work[bark]<curve[i])work[bark]=curve[i];
- if(bark>last+1){
- /* If the bark scale is climbing rapidly, some bins may end up
- going unused. This isn't a waste actually; it keeps the
- scale resolution even so that the LPC generator has an easy
- time. However, if we leave the bins empty we lose energy.
- So, fill 'em in. The decoder does not do anything with he
- unused bins, so we can fill them anyway we like to end up
- with a better spectral curve */
-
- /* we'll always have a bin zero, so we don't need to guard init */
- long span=bark-last;
- for(j=1;j<span;j++){
- float del=(float)j/span;
- work[j+last]=work[bark]*del+work[last]*(1.-del);
- }
- }
- last=bark;
- }
-
- /* If we're over-ranged to avoid edge effects, fill in the end of spectrum gap */
- for(i=bark+1;i<mapped;i++)
- work[i]=work[i-1];
-
- return vorbis_lpc_from_curve(work,lpc,&(l->lpclook));
-}
-
-/* generate the whole freq response curve of an LSP IIR filter */
-static int floor0_forward(vorbis_block *vb,vorbis_look_floor *i,
- float *in,float *out){
- long j;
+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;
- float *work=alloca((look->ln+look->n)*sizeof(float));
- float amp;
- long bits=0;
- static int seq=0;
-
-#ifdef TRAIN_LSP
- FILE *of;
- FILE *ef;
- char buffer[80];
-
-#if 1
- sprintf(buffer,"lsp0coeff_%d.vqd",vb->mode);
- of=fopen(buffer,"a");
-#endif
-
- sprintf(buffer,"lsp0ent_%d.vqd",vb->mode);
- ef=fopen(buffer,"a");
-#endif
-
- /* our floor comes in on a linear scale; go to a [-Inf...0] dB
- scale. The curve has to be positive, so we offset it. */
-
- for(j=0;j<look->n;j++)
- work[j]=todB(in[j])+info->ampdB;
-
- /* use 'out' as temp storage */
- /* Convert our floor to a set of lpc coefficients */
- amp=sqrt(_curve_to_lpc(work,out,look));
-
- /* amp is in the range (0. to ampdB]. Encode that range using
- ampbits bits */
-
- {
- long maxval=(1L<<info->ampbits)-1;
-
- long val=rint(amp/info->ampdB*maxval);
-
- if(val<0)val=0; /* likely */
- if(val>maxval)val=maxval; /* not bloody likely */
-
- oggpack_write(&vb->opb,val,info->ampbits);
- if(val>0)
- amp=(float)val/maxval*info->ampdB;
- else
- amp=0;
- }
-
- if(amp>0){
-
- /* the spec supports using one of a number of codebooks. Right
- now, encode using this lib supports only one */
- backend_lookup_state *be=vb->vd->backend_state;
- codebook *b=be->fullbooks+info->books[0];
- oggpack_write(&vb->opb,0,_ilog(info->numbooks));
-
- /* LSP <-> LPC is orthogonal and LSP quantizes more stably */
- vorbis_lpc_to_lsp(out,out,look->m);
-
-#ifdef ANALYSIS
- {
- float *lspwork=alloca(look->m*sizeof(float));
- memcpy(lspwork,out,look->m*sizeof(float));
- vorbis_lsp_to_curve(lspwork,look->linearmap,look->n,look->ln,
- work,look->m,amp,info->ampdB);
- _analysis_output("prefit",seq,work,look->n,0,1);
+ int j,k;
- }
+ int ampraw=oggpack_read(&vb->opb,info->ampbits);
+ if(ampraw>0){ /* also handles the -1 out of data case */
+ long maxval=(1<<info->ampbits)-1;
+ float amp=(float)ampraw/maxval*info->ampdB;
+ int booknum=oggpack_read(&vb->opb,ov_ilog(info->numbooks));
-#endif
+ if(booknum!=-1 && booknum<info->numbooks){ /* 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 1
-#ifdef TRAIN_LSP
- {
- float last=0.;
- for(j=0;j<look->m;j++){
- fprintf(of,"%.12g, ",out[j]-last);
- last=out[j];
+ if(vorbis_book_decodev_set(b,lsp,&vb->opb,look->m)==-1)goto eop;
+ for(j=0;j<look->m;){
+ for(k=0;j<look->m && k<b->dim;k++,j++)lsp[j]+=last;
+ last=lsp[j-1];
}
- }
- fprintf(of,"\n");
- fclose(of);
-#endif
-#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. */
-
- for(j=0;j<look->m;j+=b->dim){
- int entry=_f0_fit(b,out,work,j);
- bits+=vorbis_book_encode(b,entry,&vb->opb);
-
-#ifdef TRAIN_LSP
- fprintf(ef,"%d,\n",entry);
-#endif
+ lsp[look->m]=amp;
+ return(lsp);
}
-
-#ifdef ANALYSIS
- {
- float last=0;
- for(j=0;j<look->m;j++){
- out[j]=work[j]-last;
- last=work[j];
- }
- }
-
-#endif
-
-#ifdef TRAIN_LSP
- fclose(ef);
-#endif
-
- /* take the coefficients back to a spectral envelope curve */
- vorbis_lsp_to_curve(out,look->linearmap,look->n,look->ln,
- work,look->m,amp,info->ampdB);
- return(1);
}
-
- memset(out,0,sizeof(float)*look->n);
- seq++;
- return(0);
+ eop:
+ return(NULL);
}
-static int floor0_inverse(vorbis_block *vb,vorbis_look_floor *i,float *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;
-
- int ampraw=oggpack_read(&vb->opb,info->ampbits);
- if(ampraw>0){ /* also handles the -1 out of data case */
- long maxval=(1<<info->ampbits)-1;
- float amp=(float)ampraw/maxval*info->ampdB;
- int booknum=oggpack_read(&vb->opb,_ilog(info->numbooks));
- float *lsp=alloca(sizeof(float)*look->m);
-
- if(booknum!=-1){
- backend_lookup_state *be=vb->vd->backend_state;
- codebook *b=be->fullbooks+info->books[booknum];
- float last=0.;
-
- memset(out,0,sizeof(double)*look->m);
-
- for(j=0;j<look->m;j+=b->dim)
- if(vorbis_book_decodevs(b,lsp+j,&vb->opb,1,-1)==-1)goto eop;
- for(j=0;j<look->m;){
- for(k=0;k<b->dim;k++,j++)lsp[j]+=last;
- last=lsp[j-1];
- }
-
- /* take the coefficients back to a spectral envelope curve */
- vorbis_lsp_to_curve(out,look->linearmap,look->n,look->ln,
- lsp,look->m,amp,info->ampdB);
- return(1);
- }
- }
- eop:
- memset(out,0,sizeof(float)*look->n);
+ 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_curve(out,
+ look->linearmap[vb->W],
+ look->n[vb->W],
+ look->ln,
+ lsp,look->m,amp,(float)info->ampdB);
+ return(1);
+ }
+ memset(out,0,sizeof(*out)*look->n[vb->W]);
return(0);
}
/* export hooks */
-vorbis_func_floor floor0_exportbundle={
- &floor0_pack,&floor0_unpack,&floor0_look,&floor0_copy_info,&floor0_free_info,
- &floor0_free_look,&floor0_forward,&floor0_inverse
+const vorbis_func_floor floor0_exportbundle={
+ NULL,&floor0_unpack,&floor0_look,&floor0_free_info,
+ &floor0_free_look,&floor0_inverse1,&floor0_inverse2
};
-
-
projects / platform / upstream / libvorbis.git / blobdiff