* 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 1994-2001 *
- * by the XIPHOPHORUS Company http://www.xiph.org/ *
-
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2010 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
+ * *
********************************************************************
function: channel mapping 0 implementation
- last mod: $Id: mapping0.c,v 1.28 2001/05/27 06:44:00 xiphmont Exp $
********************************************************************/
#include "vorbis/codec.h"
#include "codec_internal.h"
#include "codebook.h"
-#include "bitbuffer.h"
+#include "window.h"
#include "registry.h"
#include "psy.h"
#include "misc.h"
blocksize is set by the mode, and low backend lookups may require
parameters from other areas of the mode/mapping */
-typedef struct {
- drft_lookup fft_look;
- vorbis_info_mode *mode;
- vorbis_info_mapping0 *map;
-
- vorbis_look_time **time_look;
- vorbis_look_floor **floor_look;
-
- vorbis_look_residue **residue_look;
- vorbis_look_psy *psy_look;
-
- vorbis_func_time **time_func;
- vorbis_func_floor **floor_func;
- vorbis_func_residue **residue_func;
-
- int ch;
- long lastframe; /* if a different mode is called, we need to
- invalidate decay */
-} vorbis_look_mapping0;
-
-static vorbis_info_mapping *mapping0_copy_info(vorbis_info_mapping *vm){
- vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)vm;
- vorbis_info_mapping0 *ret=_ogg_malloc(sizeof(vorbis_info_mapping0));
- memcpy(ret,info,sizeof(vorbis_info_mapping0));
- return(ret);
-}
-
static void mapping0_free_info(vorbis_info_mapping *i){
- if(i){
- memset(i,0,sizeof(vorbis_info_mapping0));
- _ogg_free(i);
+ vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)i;
+ if(info){
+ memset(info,0,sizeof(*info));
+ _ogg_free(info);
}
}
-static void mapping0_free_look(vorbis_look_mapping *look){
+static void mapping0_pack(vorbis_info *vi,vorbis_info_mapping *vm,
+ oggpack_buffer *opb){
int i;
- vorbis_look_mapping0 *l=(vorbis_look_mapping0 *)look;
- if(l){
- drft_clear(&l->fft_look);
-
- for(i=0;i<l->map->submaps;i++){
- l->time_func[i]->free_look(l->time_look[i]);
- l->floor_func[i]->free_look(l->floor_look[i]);
- l->residue_func[i]->free_look(l->residue_look[i]);
- if(l->psy_look)_vp_psy_clear(l->psy_look+i);
- }
+ vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)vm;
- _ogg_free(l->time_func);
- _ogg_free(l->floor_func);
- _ogg_free(l->residue_func);
- _ogg_free(l->time_look);
- _ogg_free(l->floor_look);
- _ogg_free(l->residue_look);
- if(l->psy_look)_ogg_free(l->psy_look);
- memset(l,0,sizeof(vorbis_look_mapping0));
- _ogg_free(l);
- }
-}
+ /* another 'we meant to do it this way' hack... up to beta 4, we
+ packed 4 binary zeros here to signify one submapping in use. We
+ now redefine that to mean four bitflags that indicate use of
+ deeper features; bit0:submappings, bit1:coupling,
+ bit2,3:reserved. This is backward compatable with all actual uses
+ of the beta code. */
-static vorbis_look_mapping *mapping0_look(vorbis_dsp_state *vd,vorbis_info_mode *vm,
- vorbis_info_mapping *m){
- int i;
- vorbis_info *vi=vd->vi;
- codec_setup_info *ci=vi->codec_setup;
- vorbis_look_mapping0 *look=_ogg_calloc(1,sizeof(vorbis_look_mapping0));
- vorbis_info_mapping0 *info=look->map=(vorbis_info_mapping0 *)m;
- look->mode=vm;
-
- look->time_look=_ogg_calloc(info->submaps,sizeof(vorbis_look_time *));
- look->floor_look=_ogg_calloc(info->submaps,sizeof(vorbis_look_floor *));
-
- look->residue_look=_ogg_calloc(info->submaps,sizeof(vorbis_look_residue *));
- if(ci->psys)look->psy_look=_ogg_calloc(info->submaps,sizeof(vorbis_look_psy));
-
- look->time_func=_ogg_calloc(info->submaps,sizeof(vorbis_func_time *));
- look->floor_func=_ogg_calloc(info->submaps,sizeof(vorbis_func_floor *));
- look->residue_func=_ogg_calloc(info->submaps,sizeof(vorbis_func_residue *));
-
- for(i=0;i<info->submaps;i++){
- int timenum=info->timesubmap[i];
- int floornum=info->floorsubmap[i];
- int resnum=info->residuesubmap[i];
-
- look->time_func[i]=_time_P[ci->time_type[timenum]];
- look->time_look[i]=look->time_func[i]->
- look(vd,vm,ci->time_param[timenum]);
- look->floor_func[i]=_floor_P[ci->floor_type[floornum]];
- look->floor_look[i]=look->floor_func[i]->
- look(vd,vm,ci->floor_param[floornum]);
- look->residue_func[i]=_residue_P[ci->residue_type[resnum]];
- look->residue_look[i]=look->residue_func[i]->
- look(vd,vm,ci->residue_param[resnum]);
-
- if(ci->psys && vd->analysisp){
- int psynum=info->psysubmap[i];
- _vp_psy_init(look->psy_look+i,ci->psy_param[psynum],
- ci->blocksizes[vm->blockflag]/2,vi->rate);
+ if(info->submaps>1){
+ oggpack_write(opb,1,1);
+ oggpack_write(opb,info->submaps-1,4);
+ }else
+ oggpack_write(opb,0,1);
+
+ if(info->coupling_steps>0){
+ oggpack_write(opb,1,1);
+ oggpack_write(opb,info->coupling_steps-1,8);
+
+ for(i=0;i<info->coupling_steps;i++){
+ oggpack_write(opb,info->coupling_mag[i],ov_ilog(vi->channels-1));
+ oggpack_write(opb,info->coupling_ang[i],ov_ilog(vi->channels-1));
}
- }
-
- look->ch=vi->channels;
+ }else
+ oggpack_write(opb,0,1);
- if(vd->analysisp)drft_init(&look->fft_look,ci->blocksizes[vm->blockflag]);
- return(look);
-}
-
-static void mapping0_pack(vorbis_info *vi,vorbis_info_mapping *vm,oggpack_buffer *opb){
- int i;
- vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)vm;
+ oggpack_write(opb,0,2); /* 2,3:reserved */
- oggpack_write(opb,info->submaps-1,4);
/* we don't write the channel submappings if we only have one... */
if(info->submaps>1){
for(i=0;i<vi->channels;i++)
oggpack_write(opb,info->chmuxlist[i],4);
}
for(i=0;i<info->submaps;i++){
- oggpack_write(opb,info->timesubmap[i],8);
+ oggpack_write(opb,0,8); /* time submap unused */
oggpack_write(opb,info->floorsubmap[i],8);
oggpack_write(opb,info->residuesubmap[i],8);
}
/* also responsible for range checking */
static vorbis_info_mapping *mapping0_unpack(vorbis_info *vi,oggpack_buffer *opb){
- int i;
- vorbis_info_mapping0 *info=_ogg_calloc(1,sizeof(vorbis_info_mapping0));
+ int i,b;
+ vorbis_info_mapping0 *info=_ogg_calloc(1,sizeof(*info));
codec_setup_info *ci=vi->codec_setup;
- memset(info,0,sizeof(vorbis_info_mapping0));
+ if(vi->channels<=0)goto err_out;
+
+ b=oggpack_read(opb,1);
+ if(b<0)goto err_out;
+ if(b){
+ info->submaps=oggpack_read(opb,4)+1;
+ if(info->submaps<=0)goto err_out;
+ }else
+ info->submaps=1;
+
+ b=oggpack_read(opb,1);
+ if(b<0)goto err_out;
+ if(b){
+ info->coupling_steps=oggpack_read(opb,8)+1;
+ if(info->coupling_steps<=0)goto err_out;
+ for(i=0;i<info->coupling_steps;i++){
+ /* vi->channels > 0 is enforced in the caller */
+ int testM=info->coupling_mag[i]=
+ oggpack_read(opb,ov_ilog(vi->channels-1));
+ int testA=info->coupling_ang[i]=
+ oggpack_read(opb,ov_ilog(vi->channels-1));
+
+ if(testM<0 ||
+ testA<0 ||
+ testM==testA ||
+ testM>=vi->channels ||
+ testA>=vi->channels) goto err_out;
+ }
- info->submaps=oggpack_read(opb,4)+1;
+ }
+
+ if(oggpack_read(opb,2)!=0)goto err_out; /* 2,3:reserved */
if(info->submaps>1){
for(i=0;i<vi->channels;i++){
info->chmuxlist[i]=oggpack_read(opb,4);
- if(info->chmuxlist[i]>=info->submaps)goto err_out;
+ if(info->chmuxlist[i]>=info->submaps || info->chmuxlist[i]<0)goto err_out;
}
}
for(i=0;i<info->submaps;i++){
- info->timesubmap[i]=oggpack_read(opb,8);
- if(info->timesubmap[i]>=ci->times)goto err_out;
+ oggpack_read(opb,8); /* time submap unused */
info->floorsubmap[i]=oggpack_read(opb,8);
- if(info->floorsubmap[i]>=ci->floors)goto err_out;
+ if(info->floorsubmap[i]>=ci->floors || info->floorsubmap[i]<0)goto err_out;
info->residuesubmap[i]=oggpack_read(opb,8);
- if(info->residuesubmap[i]>=ci->residues)goto err_out;
+ if(info->residuesubmap[i]>=ci->residues || info->residuesubmap[i]<0)goto err_out;
}
return info;
#include "envelope.h"
#include "mdct.h"
#include "psy.h"
-#define VORBIS_IEEE_FLOAT32
#include "scales.h"
-/* no time mapping implementation for now */
+#if 0
static long seq=0;
-static int mapping0_forward(vorbis_block *vb,vorbis_look_mapping *l){
+static ogg_int64_t total=0;
+static float FLOOR1_fromdB_LOOKUP[256]={
+ 1.0649863e-07F, 1.1341951e-07F, 1.2079015e-07F, 1.2863978e-07F,
+ 1.3699951e-07F, 1.4590251e-07F, 1.5538408e-07F, 1.6548181e-07F,
+ 1.7623575e-07F, 1.8768855e-07F, 1.9988561e-07F, 2.128753e-07F,
+ 2.2670913e-07F, 2.4144197e-07F, 2.5713223e-07F, 2.7384213e-07F,
+ 2.9163793e-07F, 3.1059021e-07F, 3.3077411e-07F, 3.5226968e-07F,
+ 3.7516214e-07F, 3.9954229e-07F, 4.2550680e-07F, 4.5315863e-07F,
+ 4.8260743e-07F, 5.1396998e-07F, 5.4737065e-07F, 5.8294187e-07F,
+ 6.2082472e-07F, 6.6116941e-07F, 7.0413592e-07F, 7.4989464e-07F,
+ 7.9862701e-07F, 8.5052630e-07F, 9.0579828e-07F, 9.6466216e-07F,
+ 1.0273513e-06F, 1.0941144e-06F, 1.1652161e-06F, 1.2409384e-06F,
+ 1.3215816e-06F, 1.4074654e-06F, 1.4989305e-06F, 1.5963394e-06F,
+ 1.7000785e-06F, 1.8105592e-06F, 1.9282195e-06F, 2.0535261e-06F,
+ 2.1869758e-06F, 2.3290978e-06F, 2.4804557e-06F, 2.6416497e-06F,
+ 2.8133190e-06F, 2.9961443e-06F, 3.1908506e-06F, 3.3982101e-06F,
+ 3.6190449e-06F, 3.8542308e-06F, 4.1047004e-06F, 4.3714470e-06F,
+ 4.6555282e-06F, 4.9580707e-06F, 5.2802740e-06F, 5.6234160e-06F,
+ 5.9888572e-06F, 6.3780469e-06F, 6.7925283e-06F, 7.2339451e-06F,
+ 7.7040476e-06F, 8.2047000e-06F, 8.7378876e-06F, 9.3057248e-06F,
+ 9.9104632e-06F, 1.0554501e-05F, 1.1240392e-05F, 1.1970856e-05F,
+ 1.2748789e-05F, 1.3577278e-05F, 1.4459606e-05F, 1.5399272e-05F,
+ 1.6400004e-05F, 1.7465768e-05F, 1.8600792e-05F, 1.9809576e-05F,
+ 2.1096914e-05F, 2.2467911e-05F, 2.3928002e-05F, 2.5482978e-05F,
+ 2.7139006e-05F, 2.8902651e-05F, 3.0780908e-05F, 3.2781225e-05F,
+ 3.4911534e-05F, 3.7180282e-05F, 3.9596466e-05F, 4.2169667e-05F,
+ 4.4910090e-05F, 4.7828601e-05F, 5.0936773e-05F, 5.4246931e-05F,
+ 5.7772202e-05F, 6.1526565e-05F, 6.5524908e-05F, 6.9783085e-05F,
+ 7.4317983e-05F, 7.9147585e-05F, 8.4291040e-05F, 8.9768747e-05F,
+ 9.5602426e-05F, 0.00010181521F, 0.00010843174F, 0.00011547824F,
+ 0.00012298267F, 0.00013097477F, 0.00013948625F, 0.00014855085F,
+ 0.00015820453F, 0.00016848555F, 0.00017943469F, 0.00019109536F,
+ 0.00020351382F, 0.00021673929F, 0.00023082423F, 0.00024582449F,
+ 0.00026179955F, 0.00027881276F, 0.00029693158F, 0.00031622787F,
+ 0.00033677814F, 0.00035866388F, 0.00038197188F, 0.00040679456F,
+ 0.00043323036F, 0.00046138411F, 0.00049136745F, 0.00052329927F,
+ 0.00055730621F, 0.00059352311F, 0.00063209358F, 0.00067317058F,
+ 0.00071691700F, 0.00076350630F, 0.00081312324F, 0.00086596457F,
+ 0.00092223983F, 0.00098217216F, 0.0010459992F, 0.0011139742F,
+ 0.0011863665F, 0.0012634633F, 0.0013455702F, 0.0014330129F,
+ 0.0015261382F, 0.0016253153F, 0.0017309374F, 0.0018434235F,
+ 0.0019632195F, 0.0020908006F, 0.0022266726F, 0.0023713743F,
+ 0.0025254795F, 0.0026895994F, 0.0028643847F, 0.0030505286F,
+ 0.0032487691F, 0.0034598925F, 0.0036847358F, 0.0039241906F,
+ 0.0041792066F, 0.0044507950F, 0.0047400328F, 0.0050480668F,
+ 0.0053761186F, 0.0057254891F, 0.0060975636F, 0.0064938176F,
+ 0.0069158225F, 0.0073652516F, 0.0078438871F, 0.0083536271F,
+ 0.0088964928F, 0.009474637F, 0.010090352F, 0.010746080F,
+ 0.011444421F, 0.012188144F, 0.012980198F, 0.013823725F,
+ 0.014722068F, 0.015678791F, 0.016697687F, 0.017782797F,
+ 0.018938423F, 0.020169149F, 0.021479854F, 0.022875735F,
+ 0.024362330F, 0.025945531F, 0.027631618F, 0.029427276F,
+ 0.031339626F, 0.033376252F, 0.035545228F, 0.037855157F,
+ 0.040315199F, 0.042935108F, 0.045725273F, 0.048696758F,
+ 0.051861348F, 0.055231591F, 0.058820850F, 0.062643361F,
+ 0.066714279F, 0.071049749F, 0.075666962F, 0.080584227F,
+ 0.085821044F, 0.091398179F, 0.097337747F, 0.10366330F,
+ 0.11039993F, 0.11757434F, 0.12521498F, 0.13335215F,
+ 0.14201813F, 0.15124727F, 0.16107617F, 0.17154380F,
+ 0.18269168F, 0.19456402F, 0.20720788F, 0.22067342F,
+ 0.23501402F, 0.25028656F, 0.26655159F, 0.28387361F,
+ 0.30232132F, 0.32196786F, 0.34289114F, 0.36517414F,
+ 0.38890521F, 0.41417847F, 0.44109412F, 0.46975890F,
+ 0.50028648F, 0.53279791F, 0.56742212F, 0.60429640F,
+ 0.64356699F, 0.68538959F, 0.72993007F, 0.77736504F,
+ 0.82788260F, 0.88168307F, 0.9389798F, 1.F,
+};
+
+#endif
+
+
+static int mapping0_forward(vorbis_block *vb){
vorbis_dsp_state *vd=vb->vd;
vorbis_info *vi=vd->vi;
- backend_lookup_state *b=vb->vd->backend_state;
- vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)l;
- vorbis_info_mapping0 *info=look->map;
- vorbis_info_mode *mode=look->mode;
+ codec_setup_info *ci=vi->codec_setup;
+ private_state *b=vb->vd->backend_state;
vorbis_block_internal *vbi=(vorbis_block_internal *)vb->internal;
int n=vb->pcmend;
- int i,j;
- float *window=b->window[vb->W][vb->lW][vb->nW][mode->windowtype];
+ int i,j,k;
+
+ int *nonzero = alloca(sizeof(*nonzero)*vi->channels);
+ float **gmdct = _vorbis_block_alloc(vb,vi->channels*sizeof(*gmdct));
+ int **iwork = _vorbis_block_alloc(vb,vi->channels*sizeof(*iwork));
+ int ***floor_posts = _vorbis_block_alloc(vb,vi->channels*sizeof(*floor_posts));
- float **pcmbundle=alloca(sizeof(float *)*vi->channels);
+ float global_ampmax=vbi->ampmax;
+ float *local_ampmax=alloca(sizeof(*local_ampmax)*vi->channels);
+ int blocktype=vbi->blocktype;
- int *nonzero=alloca(sizeof(int)*vi->channels);
+ int modenumber=vb->W;
+ vorbis_info_mapping0 *info=ci->map_param[modenumber];
+ vorbis_look_psy *psy_look=b->psy+blocktype+(vb->W?2:0);
- float *work=_vorbis_block_alloc(vb,n*sizeof(float));
- float newmax=vbi->ampmax;
+ vb->mode=modenumber;
for(i=0;i<vi->channels;i++){
float scale=4.f/n;
- int submap=info->chmuxlist[i];
- float ret;
-
- /* the following makes things clearer to *me* anyway */
- float *pcm =vb->pcm[i];
- float *mdct =pcm;
- float *logmdct =pcm+n/2;
- float *res =pcm;
- float *codedflr=pcm+n/2;
- float *fft =work;
- float *logfft =work;
- float *logmax =work;
- float *logmask =work+n/2;
+ float scale_dB;
+
+ float *pcm =vb->pcm[i];
+ float *logfft =pcm;
+
+ iwork[i]=_vorbis_block_alloc(vb,n/2*sizeof(**iwork));
+ gmdct[i]=_vorbis_block_alloc(vb,n/2*sizeof(**gmdct));
+
+ scale_dB=todB(&scale) + .345; /* + .345 is a hack; the original
+ todB estimation used on IEEE 754
+ compliant machines had a bug that
+ returned dB values about a third
+ of a decibel too high. The bug
+ was harmless because tunings
+ implicitly took that into
+ account. However, fixing the bug
+ in the estimator requires
+ changing all the tunings as well.
+ For now, it's easier to sync
+ things back up here, and
+ recalibrate the tunings in the
+ next major model upgrade. */
+
+#if 0
+ if(vi->channels==2){
+ if(i==0)
+ _analysis_output("pcmL",seq,pcm,n,0,0,total-n/2);
+ else
+ _analysis_output("pcmR",seq,pcm,n,0,0,total-n/2);
+ }else{
+ _analysis_output("pcm",seq,pcm,n,0,0,total-n/2);
+ }
+#endif
/* window the PCM data */
- for(j=0;j<n;j++)
- fft[j]=pcm[j]*=window[j];
-
+ _vorbis_apply_window(pcm,b->window,ci->blocksizes,vb->lW,vb->W,vb->nW);
+
+#if 0
+ if(vi->channels==2){
+ if(i==0)
+ _analysis_output("windowedL",seq,pcm,n,0,0,total-n/2);
+ else
+ _analysis_output("windowedR",seq,pcm,n,0,0,total-n/2);
+ }else{
+ _analysis_output("windowed",seq,pcm,n,0,0,total-n/2);
+ }
+#endif
+
/* transform the PCM data */
/* only MDCT right now.... */
- mdct_forward(b->transform[vb->W][0],pcm,pcm);
- for(j=0;j<n/2;j++)
- logmdct[j]=todB(mdct+j);
-
+ mdct_forward(b->transform[vb->W][0],pcm,gmdct[i]);
+
/* FFT yields more accurate tonal estimation (not phase sensitive) */
- drft_forward(&look->fft_look,fft);
- fft[0]*=scale;
- fft[0]=todB(fft);
+ drft_forward(&b->fft_look[vb->W],pcm);
+ logfft[0]=scale_dB+todB(pcm) + .345; /* + .345 is a hack; the
+ original todB estimation used on
+ IEEE 754 compliant machines had a
+ bug that returned dB values about
+ a third of a decibel too high.
+ The bug was harmless because
+ tunings implicitly took that into
+ account. However, fixing the bug
+ in the estimator requires
+ changing all the tunings as well.
+ For now, it's easier to sync
+ things back up here, and
+ recalibrate the tunings in the
+ next major model upgrade. */
+ local_ampmax[i]=logfft[0];
for(j=1;j<n-1;j+=2){
- float temp=scale*FAST_HYPOT(fft[j],fft[j+1]);
- logfft[(j+1)>>1]=todB(&temp);
+ float temp=pcm[j]*pcm[j]+pcm[j+1]*pcm[j+1];
+ temp=logfft[(j+1)>>1]=scale_dB+.5f*todB(&temp) + .345; /* +
+ .345 is a hack; the original todB
+ estimation used on IEEE 754
+ compliant machines had a bug that
+ returned dB values about a third
+ of a decibel too high. The bug
+ was harmless because tunings
+ implicitly took that into
+ account. However, fixing the bug
+ in the estimator requires
+ changing all the tunings as well.
+ For now, it's easier to sync
+ things back up here, and
+ recalibrate the tunings in the
+ next major model upgrade. */
+ if(temp>local_ampmax[i])local_ampmax[i]=temp;
}
- _analysis_output("fft",seq,logfft,n/2,0,0);
- _analysis_output("mdct",seq,logmdct,n/2,0,0);
-
- /* perform psychoacoustics; do masking */
- ret=_vp_compute_mask(look->psy_look+submap,
- logfft, /* -> logmax */
- logmdct,
- logmask,
- vbi->ampmax);
- if(ret>newmax)newmax=ret;
-
- _analysis_output("mask",seq,logmask,n/2,0,0);
-
- /* perform floor encoding */
- nonzero[i]=look->floor_func[submap]->
- forward(vb,look->floor_look[submap],
- mdct,
- logmdct,
- logmask,
- logmax,
- res,
- codedflr);
-
- _analysis_output("codedflr",seq,codedflr,n/2,0,1);
- _analysis_output("res",seq++,res,n/2,0,0);
-
-#ifdef TRAIN_RES
- if(nonzero[i]){
- FILE *of;
- char buffer[80];
-
- sprintf(buffer,"residue_%d.vqd",vb->mode);
- of=fopen(buffer,"a");
- for(j=0;j<n/2;j++){
- fprintf(of,"%.2f, ",res[j]);
- if(fabs(res[j])>1000){
- fprintf(stderr," %d ",seq-1);
- }
+ if(local_ampmax[i]>0.f)local_ampmax[i]=0.f;
+ if(local_ampmax[i]>global_ampmax)global_ampmax=local_ampmax[i];
+
+#if 0
+ if(vi->channels==2){
+ if(i==0){
+ _analysis_output("fftL",seq,logfft,n/2,1,0,0);
+ }else{
+ _analysis_output("fftR",seq,logfft,n/2,1,0,0);
}
- fprintf(of,"\n");
- fclose(of);
+ }else{
+ _analysis_output("fft",seq,logfft,n/2,1,0,0);
}
-#endif
+#endif
+
}
- vbi->ampmax=newmax;
+ {
+ float *noise = _vorbis_block_alloc(vb,n/2*sizeof(*noise));
+ float *tone = _vorbis_block_alloc(vb,n/2*sizeof(*tone));
- /* perform residue encoding with residue mapping; this is
- multiplexed. All the channels belonging to one submap are
- encoded (values interleaved), then the next submap, etc */
-
- for(i=0;i<info->submaps;i++){
- int ch_in_bundle=0;
- for(j=0;j<vi->channels;j++){
- if(info->chmuxlist[j]==i && nonzero[j]>0){
- pcmbundle[ch_in_bundle++]=vb->pcm[j];
+ for(i=0;i<vi->channels;i++){
+ /* the encoder setup assumes that all the modes used by any
+ specific bitrate tweaking use the same floor */
+
+ int submap=info->chmuxlist[i];
+
+ /* the following makes things clearer to *me* anyway */
+ float *mdct =gmdct[i];
+ float *logfft =vb->pcm[i];
+
+ float *logmdct =logfft+n/2;
+ float *logmask =logfft;
+
+ vb->mode=modenumber;
+
+ floor_posts[i]=_vorbis_block_alloc(vb,PACKETBLOBS*sizeof(**floor_posts));
+ memset(floor_posts[i],0,sizeof(**floor_posts)*PACKETBLOBS);
+
+ for(j=0;j<n/2;j++)
+ logmdct[j]=todB(mdct+j) + .345; /* + .345 is a hack; the original
+ todB estimation used on IEEE 754
+ compliant machines had a bug that
+ returned dB values about a third
+ of a decibel too high. The bug
+ was harmless because tunings
+ implicitly took that into
+ account. However, fixing the bug
+ in the estimator requires
+ changing all the tunings as well.
+ For now, it's easier to sync
+ things back up here, and
+ recalibrate the tunings in the
+ next major model upgrade. */
+
+#if 0
+ if(vi->channels==2){
+ if(i==0)
+ _analysis_output("mdctL",seq,logmdct,n/2,1,0,0);
+ else
+ _analysis_output("mdctR",seq,logmdct,n/2,1,0,0);
+ }else{
+ _analysis_output("mdct",seq,logmdct,n/2,1,0,0);
+ }
+#endif
+
+ /* first step; noise masking. Not only does 'noise masking'
+ give us curves from which we can decide how much resolution
+ to give noise parts of the spectrum, it also implicitly hands
+ us a tonality estimate (the larger the value in the
+ 'noise_depth' vector, the more tonal that area is) */
+
+ _vp_noisemask(psy_look,
+ logmdct,
+ noise); /* noise does not have by-frequency offset
+ bias applied yet */
+#if 0
+ if(vi->channels==2){
+ if(i==0)
+ _analysis_output("noiseL",seq,noise,n/2,1,0,0);
+ else
+ _analysis_output("noiseR",seq,noise,n/2,1,0,0);
+ }else{
+ _analysis_output("noise",seq,noise,n/2,1,0,0);
+ }
+#endif
+
+ /* second step: 'all the other crap'; all the stuff that isn't
+ computed/fit for bitrate management goes in the second psy
+ vector. This includes tone masking, peak limiting and ATH */
+
+ _vp_tonemask(psy_look,
+ logfft,
+ tone,
+ global_ampmax,
+ local_ampmax[i]);
+
+#if 0
+ if(vi->channels==2){
+ if(i==0)
+ _analysis_output("toneL",seq,tone,n/2,1,0,0);
+ else
+ _analysis_output("toneR",seq,tone,n/2,1,0,0);
+ }else{
+ _analysis_output("tone",seq,tone,n/2,1,0,0);
+ }
+#endif
+
+ /* third step; we offset the noise vectors, overlay tone
+ masking. We then do a floor1-specific line fit. If we're
+ performing bitrate management, the line fit is performed
+ multiple times for up/down tweakage on demand. */
+
+#if 0
+ {
+ float aotuv[psy_look->n];
+#endif
+
+ _vp_offset_and_mix(psy_look,
+ noise,
+ tone,
+ 1,
+ logmask,
+ mdct,
+ logmdct);
+
+#if 0
+ if(vi->channels==2){
+ if(i==0)
+ _analysis_output("aotuvM1_L",seq,aotuv,psy_look->n,1,1,0);
+ else
+ _analysis_output("aotuvM1_R",seq,aotuv,psy_look->n,1,1,0);
+ }else{
+ _analysis_output("aotuvM1",seq,aotuv,psy_look->n,1,1,0);
+ }
+ }
+#endif
+
+
+#if 0
+ if(vi->channels==2){
+ if(i==0)
+ _analysis_output("mask1L",seq,logmask,n/2,1,0,0);
+ else
+ _analysis_output("mask1R",seq,logmask,n/2,1,0,0);
+ }else{
+ _analysis_output("mask1",seq,logmask,n/2,1,0,0);
+ }
+#endif
+
+ /* this algorithm is hardwired to floor 1 for now; abort out if
+ we're *not* floor1. This won't happen unless someone has
+ broken the encode setup lib. Guard it anyway. */
+ if(ci->floor_type[info->floorsubmap[submap]]!=1)return(-1);
+
+ floor_posts[i][PACKETBLOBS/2]=
+ floor1_fit(vb,b->flr[info->floorsubmap[submap]],
+ logmdct,
+ logmask);
+
+ /* are we managing bitrate? If so, perform two more fits for
+ later rate tweaking (fits represent hi/lo) */
+ if(vorbis_bitrate_managed(vb) && floor_posts[i][PACKETBLOBS/2]){
+ /* higher rate by way of lower noise curve */
+
+ _vp_offset_and_mix(psy_look,
+ noise,
+ tone,
+ 2,
+ logmask,
+ mdct,
+ logmdct);
+
+#if 0
+ if(vi->channels==2){
+ if(i==0)
+ _analysis_output("mask2L",seq,logmask,n/2,1,0,0);
+ else
+ _analysis_output("mask2R",seq,logmask,n/2,1,0,0);
+ }else{
+ _analysis_output("mask2",seq,logmask,n/2,1,0,0);
+ }
+#endif
+
+ floor_posts[i][PACKETBLOBS-1]=
+ floor1_fit(vb,b->flr[info->floorsubmap[submap]],
+ logmdct,
+ logmask);
+
+ /* lower rate by way of higher noise curve */
+ _vp_offset_and_mix(psy_look,
+ noise,
+ tone,
+ 0,
+ logmask,
+ mdct,
+ logmdct);
+
+#if 0
+ if(vi->channels==2){
+ if(i==0)
+ _analysis_output("mask0L",seq,logmask,n/2,1,0,0);
+ else
+ _analysis_output("mask0R",seq,logmask,n/2,1,0,0);
+ }else{
+ _analysis_output("mask0",seq,logmask,n/2,1,0,0);
+ }
+#endif
+
+ floor_posts[i][0]=
+ floor1_fit(vb,b->flr[info->floorsubmap[submap]],
+ logmdct,
+ logmask);
+
+ /* we also interpolate a range of intermediate curves for
+ intermediate rates */
+ for(k=1;k<PACKETBLOBS/2;k++)
+ floor_posts[i][k]=
+ floor1_interpolate_fit(vb,b->flr[info->floorsubmap[submap]],
+ floor_posts[i][0],
+ floor_posts[i][PACKETBLOBS/2],
+ k*65536/(PACKETBLOBS/2));
+ for(k=PACKETBLOBS/2+1;k<PACKETBLOBS-1;k++)
+ floor_posts[i][k]=
+ floor1_interpolate_fit(vb,b->flr[info->floorsubmap[submap]],
+ floor_posts[i][PACKETBLOBS/2],
+ floor_posts[i][PACKETBLOBS-1],
+ (k-PACKETBLOBS/2)*65536/(PACKETBLOBS/2));
}
}
-
- look->residue_func[i]->forward(vb,look->residue_look[i],
- pcmbundle,ch_in_bundle);
}
-
- look->lastframe=vb->sequence;
+ vbi->ampmax=global_ampmax;
+
+ /*
+ the next phases are performed once for vbr-only and PACKETBLOB
+ times for bitrate managed modes.
+
+ 1) encode actual mode being used
+ 2) encode the floor for each channel, compute coded mask curve/res
+ 3) normalize and couple.
+ 4) encode residue
+ 5) save packet bytes to the packetblob vector
+
+ */
+
+ /* iterate over the many masking curve fits we've created */
+
+ {
+ int **couple_bundle=alloca(sizeof(*couple_bundle)*vi->channels);
+ int *zerobundle=alloca(sizeof(*zerobundle)*vi->channels);
+
+ for(k=(vorbis_bitrate_managed(vb)?0:PACKETBLOBS/2);
+ k<=(vorbis_bitrate_managed(vb)?PACKETBLOBS-1:PACKETBLOBS/2);
+ k++){
+ oggpack_buffer *opb=vbi->packetblob[k];
+
+ /* start out our new packet blob with packet type and mode */
+ /* Encode the packet type */
+ oggpack_write(opb,0,1);
+ /* Encode the modenumber */
+ /* Encode frame mode, pre,post windowsize, then dispatch */
+ oggpack_write(opb,modenumber,b->modebits);
+ if(vb->W){
+ oggpack_write(opb,vb->lW,1);
+ oggpack_write(opb,vb->nW,1);
+ }
+
+ /* encode floor, compute masking curve, sep out residue */
+ for(i=0;i<vi->channels;i++){
+ int submap=info->chmuxlist[i];
+ int *ilogmask=iwork[i];
+
+ nonzero[i]=floor1_encode(opb,vb,b->flr[info->floorsubmap[submap]],
+ floor_posts[i][k],
+ ilogmask);
+#if 0
+ {
+ char buf[80];
+ sprintf(buf,"maskI%c%d",i?'R':'L',k);
+ float work[n/2];
+ for(j=0;j<n/2;j++)
+ work[j]=FLOOR1_fromdB_LOOKUP[iwork[i][j]];
+ _analysis_output(buf,seq,work,n/2,1,1,0);
+ }
+#endif
+ }
+
+ /* our iteration is now based on masking curve, not prequant and
+ coupling. Only one prequant/coupling step */
+
+ /* quantize/couple */
+ /* incomplete implementation that assumes the tree is all depth
+ one, or no tree at all */
+ _vp_couple_quantize_normalize(k,
+ &ci->psy_g_param,
+ psy_look,
+ info,
+ gmdct,
+ iwork,
+ nonzero,
+ ci->psy_g_param.sliding_lowpass[vb->W][k],
+ vi->channels);
+
+#if 0
+ for(i=0;i<vi->channels;i++){
+ char buf[80];
+ sprintf(buf,"res%c%d",i?'R':'L',k);
+ float work[n/2];
+ for(j=0;j<n/2;j++)
+ work[j]=iwork[i][j];
+ _analysis_output(buf,seq,work,n/2,1,0,0);
+ }
+#endif
+
+ /* classify and encode by submap */
+ for(i=0;i<info->submaps;i++){
+ int ch_in_bundle=0;
+ long **classifications;
+ int resnum=info->residuesubmap[i];
+
+ for(j=0;j<vi->channels;j++){
+ if(info->chmuxlist[j]==i){
+ zerobundle[ch_in_bundle]=0;
+ if(nonzero[j])zerobundle[ch_in_bundle]=1;
+ couple_bundle[ch_in_bundle++]=iwork[j];
+ }
+ }
+
+ classifications=_residue_P[ci->residue_type[resnum]]->
+ class(vb,b->residue[resnum],couple_bundle,zerobundle,ch_in_bundle);
+
+ ch_in_bundle=0;
+ for(j=0;j<vi->channels;j++)
+ if(info->chmuxlist[j]==i)
+ couple_bundle[ch_in_bundle++]=iwork[j];
+
+ _residue_P[ci->residue_type[resnum]]->
+ forward(opb,vb,b->residue[resnum],
+ couple_bundle,zerobundle,ch_in_bundle,classifications,i);
+ }
+
+ /* ok, done encoding. Next protopacket. */
+ }
+
+ }
+
+#if 0
+ seq++;
+ total+=ci->blocksizes[vb->W]/4+ci->blocksizes[vb->nW]/4;
+#endif
return(0);
}
-static int mapping0_inverse(vorbis_block *vb,vorbis_look_mapping *l){
+static int mapping0_inverse(vorbis_block *vb,vorbis_info_mapping *l){
vorbis_dsp_state *vd=vb->vd;
vorbis_info *vi=vd->vi;
codec_setup_info *ci=vi->codec_setup;
- backend_lookup_state *b=vd->backend_state;
- vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)l;
- vorbis_info_mapping0 *info=look->map;
- vorbis_info_mode *mode=look->mode;
+ private_state *b=vd->backend_state;
+ vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)l;
+
int i,j;
long n=vb->pcmend=ci->blocksizes[vb->W];
- float *window=b->window[vb->W][vb->lW][vb->nW][mode->windowtype];
- float **pcmbundle=alloca(sizeof(float *)*vi->channels);
- int *nonzero=alloca(sizeof(int)*vi->channels);
-
- /* time domain information decode (note that applying the
- information would have to happen later; we'll probably add a
- function entry to the harness for that later */
- /* NOT IMPLEMENTED */
+ float **pcmbundle=alloca(sizeof(*pcmbundle)*vi->channels);
+ int *zerobundle=alloca(sizeof(*zerobundle)*vi->channels);
+
+ int *nonzero =alloca(sizeof(*nonzero)*vi->channels);
+ void **floormemo=alloca(sizeof(*floormemo)*vi->channels);
/* recover the spectral envelope; store it in the PCM vector for now */
for(i=0;i<vi->channels;i++){
- float *pcm=vb->pcm[i];
int submap=info->chmuxlist[i];
- nonzero[i]=look->floor_func[submap]->
- inverse(vb,look->floor_look[submap],pcm);
- _analysis_output("ifloor",seq+i,pcm,n/2,0,1);
+ floormemo[i]=_floor_P[ci->floor_type[info->floorsubmap[submap]]]->
+ inverse1(vb,b->flr[info->floorsubmap[submap]]);
+ if(floormemo[i])
+ nonzero[i]=1;
+ else
+ nonzero[i]=0;
+ memset(vb->pcm[i],0,sizeof(*vb->pcm[i])*n/2);
}
- /* recover the residue, apply directly to the spectral envelope */
+ /* channel coupling can 'dirty' the nonzero listing */
+ for(i=0;i<info->coupling_steps;i++){
+ if(nonzero[info->coupling_mag[i]] ||
+ nonzero[info->coupling_ang[i]]){
+ nonzero[info->coupling_mag[i]]=1;
+ nonzero[info->coupling_ang[i]]=1;
+ }
+ }
+ /* recover the residue into our working vectors */
for(i=0;i<info->submaps;i++){
int ch_in_bundle=0;
for(j=0;j<vi->channels;j++){
- if(info->chmuxlist[j]==i && nonzero[j])
- pcmbundle[ch_in_bundle++]=vb->pcm[j];
+ if(info->chmuxlist[j]==i){
+ if(nonzero[j])
+ zerobundle[ch_in_bundle]=1;
+ else
+ zerobundle[ch_in_bundle]=0;
+ pcmbundle[ch_in_bundle++]=vb->pcm[j];
+ }
}
- look->residue_func[i]->inverse(vb,look->residue_look[i],pcmbundle,ch_in_bundle);
+ _residue_P[ci->residue_type[info->residuesubmap[i]]]->
+ inverse(vb,b->residue[info->residuesubmap[i]],
+ pcmbundle,zerobundle,ch_in_bundle);
}
- /* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
- /* only MDCT right now.... */
+ /* channel coupling */
+ for(i=info->coupling_steps-1;i>=0;i--){
+ float *pcmM=vb->pcm[info->coupling_mag[i]];
+ float *pcmA=vb->pcm[info->coupling_ang[i]];
+
+ for(j=0;j<n/2;j++){
+ float mag=pcmM[j];
+ float ang=pcmA[j];
+
+ if(mag>0)
+ if(ang>0){
+ pcmM[j]=mag;
+ pcmA[j]=mag-ang;
+ }else{
+ pcmA[j]=mag;
+ pcmM[j]=mag+ang;
+ }
+ else
+ if(ang>0){
+ pcmM[j]=mag;
+ pcmA[j]=mag+ang;
+ }else{
+ pcmA[j]=mag;
+ pcmM[j]=mag-ang;
+ }
+ }
+ }
+
+ /* compute and apply spectral envelope */
for(i=0;i<vi->channels;i++){
float *pcm=vb->pcm[i];
- _analysis_output("out",seq+i,pcm,n/2,0,1);
- mdct_backward(b->transform[vb->W][0],pcm,pcm);
+ int submap=info->chmuxlist[i];
+ _floor_P[ci->floor_type[info->floorsubmap[submap]]]->
+ inverse2(vb,b->flr[info->floorsubmap[submap]],
+ floormemo[i],pcm);
}
- /* now apply the decoded pre-window time information */
- /* NOT IMPLEMENTED */
-
- /* window the data */
+ /* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
+ /* only MDCT right now.... */
for(i=0;i<vi->channels;i++){
float *pcm=vb->pcm[i];
- if(nonzero[i])
- for(j=0;j<n;j++)
- pcm[j]*=window[j];
- else
- for(j=0;j<n;j++)
- pcm[j]=0.f;
- _analysis_output("final",seq++,pcm,n,0,0);
+ mdct_backward(b->transform[vb->W][0],pcm,pcm);
}
-
- /* now apply the decoded post-window time information */
- /* NOT IMPLEMENTED */
/* all done! */
return(0);
}
/* export hooks */
-vorbis_func_mapping mapping0_exportbundle={
- &mapping0_pack,&mapping0_unpack,&mapping0_look,&mapping0_copy_info,
- &mapping0_free_info,&mapping0_free_look,&mapping0_forward,&mapping0_inverse
+const vorbis_func_mapping mapping0_exportbundle={
+ &mapping0_pack,
+ &mapping0_unpack,
+ &mapping0_free_info,
+ &mapping0_forward,
+ &mapping0_inverse
};
-
-
-
projects / platform / upstream / libvorbis.git / blobdiff