--- a/misc/tremor/mapping0.c Sun Oct 09 15:17:21 2011 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,322 +0,0 @@
-/********************************************************************
- * *
- * THIS FILE IS PART OF THE OggVorbis 'TREMOR' 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 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
- * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
- * *
- ********************************************************************
-
- function: channel mapping 0 implementation
-
- ********************************************************************/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <math.h>
-#include "ogg.h"
-#include "ivorbiscodec.h"
-#include "mdct.h"
-#include "codec_internal.h"
-#include "codebook.h"
-#include "window.h"
-#include "registry.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 */
-
-typedef struct {
- vorbis_info_mode *mode;
- vorbis_info_mapping0 *map;
-
- vorbis_look_floor **floor_look;
-
- vorbis_look_residue **residue_look;
-
- 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 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_free_look(vorbis_look_mapping *look){
- int i;
- vorbis_look_mapping0 *l=(vorbis_look_mapping0 *)look;
- if(l){
-
- for(i=0;i<l->map->submaps;i++){
- l->floor_func[i]->free_look(l->floor_look[i]);
- l->residue_func[i]->free_look(l->residue_look[i]);
- }
-
- _ogg_free(l->floor_func);
- _ogg_free(l->residue_func);
- _ogg_free(l->floor_look);
- _ogg_free(l->residue_look);
- memset(l,0,sizeof(*l));
- _ogg_free(l);
- }
-}
-
-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=(codec_setup_info *)vi->codec_setup;
- vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)_ogg_calloc(1,sizeof(*look));
- vorbis_info_mapping0 *info=look->map=(vorbis_info_mapping0 *)m;
- look->mode=vm;
-
- look->floor_look=(vorbis_look_floor **)_ogg_calloc(info->submaps,sizeof(*look->floor_look));
-
- look->residue_look=(vorbis_look_residue **)_ogg_calloc(info->submaps,sizeof(*look->residue_look));
-
- look->floor_func=(vorbis_func_floor **)_ogg_calloc(info->submaps,sizeof(*look->floor_func));
- look->residue_func=(vorbis_func_residue **)_ogg_calloc(info->submaps,sizeof(*look->residue_func));
-
- for(i=0;i<info->submaps;i++){
- int floornum=info->floorsubmap[i];
- int resnum=info->residuesubmap[i];
-
- 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]);
-
- }
-
- look->ch=vi->channels;
-
- return(look);
-}
-
-static int ilog(unsigned int v){
- int ret=0;
- if(v)--v;
- while(v){
- ret++;
- v>>=1;
- }
- return(ret);
-}
-
-/* also responsible for range checking */
-static vorbis_info_mapping *mapping0_unpack(vorbis_info *vi,oggpack_buffer *opb){
- int i;
- vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)_ogg_calloc(1,sizeof(*info));
- codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
- memset(info,0,sizeof(*info));
-
- if(oggpack_read(opb,1))
- info->submaps=oggpack_read(opb,4)+1;
- else
- info->submaps=1;
-
- if(oggpack_read(opb,1)){
- info->coupling_steps=oggpack_read(opb,8)+1;
-
- for(i=0;i<info->coupling_steps;i++){
- int testM=info->coupling_mag[i]=oggpack_read(opb,ilog(vi->channels));
- int testA=info->coupling_ang[i]=oggpack_read(opb,ilog(vi->channels));
-
- 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)goto err_out;
- }
- }
- for(i=0;i<info->submaps;i++){
- int temp=oggpack_read(opb,8);
- if(temp>=ci->times)goto err_out;
- info->floorsubmap[i]=oggpack_read(opb,8);
- if(info->floorsubmap[i]>=ci->floors)goto err_out;
- info->residuesubmap[i]=oggpack_read(opb,8);
- if(info->residuesubmap[i]>=ci->residues)goto err_out;
- }
-
- return info;
-
- err_out:
- mapping0_free_info(info);
- return(NULL);
-}
-
-static int seq=0;
-static int mapping0_inverse(vorbis_block *vb,vorbis_look_mapping *l){
- vorbis_dsp_state *vd=vb->vd;
- vorbis_info *vi=vd->vi;
- codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
- private_state *b=(private_state *)vd->backend_state;
- vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)l;
- vorbis_info_mapping0 *info=look->map;
-
- int i,j;
- long n=vb->pcmend=ci->blocksizes[vb->W];
-
- ogg_int32_t **pcmbundle=(ogg_int32_t **)alloca(sizeof(*pcmbundle)*vi->channels);
- int *zerobundle=(int *)alloca(sizeof(*zerobundle)*vi->channels);
-
- int *nonzero =(int *)alloca(sizeof(*nonzero)*vi->channels);
- void **floormemo=(void **)alloca(sizeof(*floormemo)*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 */
-
- /* 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]=look->floor_func[submap]->
- inverse1(vb,look->floor_look[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];
- }
- }
-
- look->residue_func[i]->inverse(vb,look->residue_look[i],
- pcmbundle,zerobundle,ch_in_bundle);
- }
-
- //for(j=0;j<vi->channels;j++)
- //_analysis_output("coupled",seq+j,vb->pcm[j],-8,n/2,0,0);
-
-
- /* channel coupling */
- for(i=info->coupling_steps-1;i>=0;i--){
- ogg_int32_t *pcmM=vb->pcm[info->coupling_mag[i]];
- ogg_int32_t *pcmA=vb->pcm[info->coupling_ang[i]];
-
- for(j=0;j<n/2;j++){
- ogg_int32_t mag=pcmM[j];
- ogg_int32_t 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;
- }
- }
- }
-
- //for(j=0;j<vi->channels;j++)
- //_analysis_output("residue",seq+j,vb->pcm[j],-8,n/2,0,0);
-
- /* compute and apply spectral envelope */
- for(i=0;i<vi->channels;i++){
- ogg_int32_t *pcm=vb->pcm[i];
- int submap=info->chmuxlist[i];
- look->floor_func[submap]->
- inverse2(vb,look->floor_look[submap],floormemo[i],pcm);
- }
-
- //for(j=0;j<vi->channels;j++)
- //_analysis_output("mdct",seq+j,vb->pcm[j],-24,n/2,0,1);
-
- /* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
- /* only MDCT right now.... */
- for(i=0;i<vi->channels;i++){
- ogg_int32_t *pcm=vb->pcm[i];
- mdct_backward(n,pcm,pcm);
- }
-
- //for(j=0;j<vi->channels;j++)
- //_analysis_output("imdct",seq+j,vb->pcm[j],-24,n,0,0);
-
- /* window the data */
- for(i=0;i<vi->channels;i++){
- ogg_int32_t *pcm=vb->pcm[i];
- if(nonzero[i])
- _vorbis_apply_window(pcm,b->window,ci->blocksizes,vb->lW,vb->W,vb->nW);
- else
- for(j=0;j<n;j++)
- pcm[j]=0;
-
- }
-
- //for(j=0;j<vi->channels;j++)
- //_analysis_output("window",seq+j,vb->pcm[j],-24,n,0,0);
-
- seq+=vi->channels;
- /* all done! */
- return(0);
-}
-
-/* export hooks */
-vorbis_func_mapping mapping0_exportbundle={
- &mapping0_unpack,
- &mapping0_look,
- &mapping0_free_info,
- &mapping0_free_look,
- &mapping0_inverse
-};