/********************************************************************
* *
- * 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 <monty@xiph.org> 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 <stdlib.h>
#include <string.h>
#include <math.h>
+#include <ogg/ogg.h>
#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 <stdio.h>
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;j<info->stages;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;j<info->stages;j++){
- info->books[j]=_oggpack_read(opb,8);
- if(info->books[j]<0 || info->books[j]>=vi->books)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);
+ 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;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=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 <stdio.h>
-
-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<<ampbits)-1 == amp dB = 1. amp */
- {
- long ampscale=fromdB(info->ampdB);
- long maxval=(1<<info->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;j<look->m;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;stage<info->stages;stage++){
- codebook *b=vb->vd->fullbooks+info->books[stage];
-
- if(stage==0){
- double last=0.;
- for(j=0;j<look->m;){
- for(k=0;k<b->dim;k++)out[j+k]-=last;
- bits+=vorbis_book_encodev(b,out+j,&vb->opb);
- for(k=0;k<b->dim;k++,j++){
- out[j]+=last;
- work[j]-=out[j];
- }
- last=out[j-1];
- }
- }else{
- memcpy(out,work,sizeof(double)*look->m);
- for(j=0;j<look->m;){
- bits+=vorbis_book_encodev(b,out+j,&vb->opb);
- for(k=0;k<b->dim;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<<info->ampbits)-1;
+ float amp=(float)ampraw/maxval*info->ampdB;
+ int booknum=oggpack_read(&vb->opb,_ilog(info->numbooks));
+
+ 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(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];
}
+
+ 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<<info->ampbits)-1;
- double amp=fromdB((ampraw-.5)/maxval*info->ampdB)/ampscale;
-
- memset(out,0,sizeof(double)*look->m);
- for(stage=0;stage<info->stages;stage++){
- codebook *b=vb->vd->fullbooks+info->books[stage];
- for(j=0;j<look->m;j+=b->dim)
- vorbis_book_decodev(b,out+j,&vb->opb);
- if(stage==0){
- double last=0.;
- for(j=0;j<look->m;){
- for(k=0;k<b->dim;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
};
-
-
projects / platform / upstream / libvorbis.git / blobdiff