ref: a847d7a53d64b1f7d11eb3b969c2684ea0aa399b
dir: /sys/src/cmd/audio/libvorbis/mapping0.c/
/******************************************************************** * * * 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 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 19441 2015-01-21 01:17:41Z xiphmont $ ********************************************************************/ #include <stdlib.h> #include <stdio.h> #include <string.h> #include <math.h> #include <ogg/ogg.h> #include "vorbis/codec.h" #include "codec_internal.h" #include "codebook.h" #include "window.h" #include "registry.h" #include "psy.h" #include "misc.h" /* simplistic, wasteful way of doing this (unique lookup for each mode/submapping); there should be a central repository for identical lookups. That will require minor work, so I'm putting it off as low priority. Why a lookup for each backend in a given mode? Because the blocksize is set by the mode, and low backend lookups may require parameters from other areas of the mode/mapping */ static void mapping0_free_info(vorbis_info_mapping *i){ vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)i; if(info){ memset(info,0,sizeof(*info)); _ogg_free(info); } } static void mapping0_pack(vorbis_info *vi,vorbis_info_mapping *vm, oggpack_buffer *opb){ int i; vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)vm; /* 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. */ 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)); } }else oggpack_write(opb,0,1); oggpack_write(opb,0,2); /* 2,3:reserved */ /* 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,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,b; vorbis_info_mapping0 *info=_ogg_calloc(1,sizeof(*info)); codec_setup_info *ci=vi->codec_setup; memset(info,0,sizeof(*info)); 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; } } 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 || info->chmuxlist[i]<0)goto err_out; } } for(i=0;i<info->submaps;i++){ oggpack_read(opb,8); /* time submap unused */ info->floorsubmap[i]=oggpack_read(opb,8); 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 || info->residuesubmap[i]<0)goto err_out; } return info; err_out: mapping0_free_info(info); return(NULL); } #include "os.h" #include "lpc.h" #include "lsp.h" #include "envelope.h" #include "mdct.h" #include "psy.h" #include "scales.h" #if 0 static long seq=0; 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; 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,k; int *nonzero = malloc(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 global_ampmax=vbi->ampmax; float *local_ampmax=malloc(sizeof(*local_ampmax)*vi->channels); int blocktype=vbi->blocktype; int modenumber=vb->W; vorbis_info_mapping0 *info=ci->map_param[modenumber]; vorbis_look_psy *psy_look=b->psy+blocktype+(vb->W?2:0); vb->mode=modenumber; for(i=0;i<vi->channels;i++){ float scale=4.f/n; 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 */ _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,gmdct[i]); /* FFT yields more accurate tonal estimation (not phase sensitive) */ 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=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; } 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); } }else{ _analysis_output("fft",seq,logfft,n/2,1,0,0); } #endif } { float *noise = _vorbis_block_alloc(vb,n/2*sizeof(*noise)); float *tone = _vorbis_block_alloc(vb,n/2*sizeof(*tone)); 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){ free(nonzero); free(local_ampmax); 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)); } } } 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=malloc(sizeof(*couple_bundle)*vi->channels); int *zerobundle=malloc(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. */ } free(couple_bundle); free(zerobundle); } #if 0 seq++; total+=ci->blocksizes[vb->W]/4+ci->blocksizes[vb->nW]/4; #endif free(nonzero); free(local_ampmax); return(0); } 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; 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 **pcmbundle=malloc(sizeof(*pcmbundle)*vi->channels); int *zerobundle=malloc(sizeof(*zerobundle)*vi->channels); int *nonzero =malloc(sizeof(*nonzero)*vi->channels); void **floormemo=malloc(sizeof(*floormemo)*vi->channels); /* recover the spectral envelope; store it in the PCM vector for now */ for(i=0;i<vi->channels;i++){ int submap=info->chmuxlist[i]; 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); } /* 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){ if(nonzero[j]) zerobundle[ch_in_bundle]=1; else zerobundle[ch_in_bundle]=0; pcmbundle[ch_in_bundle++]=vb->pcm[j]; } } _residue_P[ci->residue_type[info->residuesubmap[i]]]-> inverse(vb,b->residue[info->residuesubmap[i]], pcmbundle,zerobundle,ch_in_bundle); } /* 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]; int submap=info->chmuxlist[i]; _floor_P[ci->floor_type[info->floorsubmap[submap]]]-> inverse2(vb,b->flr[info->floorsubmap[submap]], floormemo[i],pcm); } /* 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]; mdct_backward(b->transform[vb->W][0],pcm,pcm); } /* all done! */ free(pcmbundle); free(zerobundle); free(nonzero); free(floormemo); return(0); } /* export hooks */ const vorbis_func_mapping mapping0_exportbundle={ &mapping0_pack, &mapping0_unpack, &mapping0_free_info, &mapping0_forward, &mapping0_inverse };