/src/tremor/mapping0.c

Source
/********************************************************************
 *                                                                  *
 * 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/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,b;
  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));

  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++){
      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 || info->chmuxlist[i]<0)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 || 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);
}

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
};

Coverage Report

Created: 2026-01-13 06:21

Line	Count	Source
1		/********************************************************************
2		* *
3		* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
4		* *
5		* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
6		* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
7		* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
8		* *
9		* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
10		* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
11		* *
12		********************************************************************
13
14		function: channel mapping 0 implementation
15
16		********************************************************************/
17
18		#include <stdlib.h>
19		#include <stdio.h>
20		#include <string.h>
21		#include <math.h>
22		#include <ogg/ogg.h>
23		#include "ivorbiscodec.h"
24		#include "mdct.h"
25		#include "codec_internal.h"
26		#include "codebook.h"
27		#include "window.h"
28		#include "registry.h"
29		#include "misc.h"
30
31		/* simplistic, wasteful way of doing this (unique lookup for each
32		mode/submapping); there should be a central repository for
33		identical lookups. That will require minor work, so I'm putting it
34		off as low priority.
35
36		Why a lookup for each backend in a given mode? Because the
37		blocksize is set by the mode, and low backend lookups may require
38		parameters from other areas of the mode/mapping */
39
40		typedef struct {
41		vorbis_info_mode *mode;
42		vorbis_info_mapping0 *map;
43
44		vorbis_look_floor **floor_look;
45
46		vorbis_look_residue **residue_look;
47
48		vorbis_func_floor **floor_func;
49		vorbis_func_residue **residue_func;
50
51		int ch;
52		long lastframe; /* if a different mode is called, we need to
53		invalidate decay */
54		} vorbis_look_mapping0;
55
56	7.75k	static void mapping0_free_info(vorbis_info_mapping *i){
57	7.75k	vorbis_info_mapping0 info=(vorbis_info_mapping0 )i;
58	7.75k	if(info){
59	7.75k	memset(info,0,sizeof(*info));
60	7.75k	_ogg_free(info);
61	7.75k	}
62	7.75k	}
63
64	9.05k	static void mapping0_free_look(vorbis_look_mapping *look){
65	9.05k	int i;
66	9.05k	vorbis_look_mapping0 l=(vorbis_look_mapping0 )look;
67	9.05k	if(l){
68
69	19.6k	for(i=0;i<l->map->submaps;i++){
70	10.5k	l->floor_func[i]->free_look(l->floor_look[i]);
71	10.5k	l->residue_func[i]->free_look(l->residue_look[i]);
72	10.5k	}
73
74	9.05k	_ogg_free(l->floor_func);
75	9.05k	_ogg_free(l->residue_func);
76	9.05k	_ogg_free(l->floor_look);
77	9.05k	_ogg_free(l->residue_look);
78	9.05k	memset(l,0,sizeof(*l));
79	9.05k	_ogg_free(l);
80	9.05k	}
81	9.05k	}
82
83		static vorbis_look_mapping mapping0_look(vorbis_dsp_state vd,vorbis_info_mode *vm,
84	9.05k	vorbis_info_mapping *m){
85	9.05k	int i;
86	9.05k	vorbis_info *vi=vd->vi;
87	9.05k	codec_setup_info ci=(codec_setup_info )vi->codec_setup;
88	9.05k	vorbis_look_mapping0 look=(vorbis_look_mapping0 )_ogg_calloc(1,sizeof(*look));
89	9.05k	vorbis_info_mapping0 info=look->map=(vorbis_info_mapping0 )m;
90	9.05k	look->mode=vm;
91
92	9.05k	look->floor_look=(vorbis_look_floor *)_ogg_calloc(info->submaps,sizeof(look->floor_look));
93
94	9.05k	look->residue_look=(vorbis_look_residue *)_ogg_calloc(info->submaps,sizeof(look->residue_look));
95
96	9.05k	look->floor_func=(vorbis_func_floor *)_ogg_calloc(info->submaps,sizeof(look->floor_func));
97	9.05k	look->residue_func=(vorbis_func_residue *)_ogg_calloc(info->submaps,sizeof(look->residue_func));
98
99	19.6k	for(i=0;i<info->submaps;i++){
100	10.5k	int floornum=info->floorsubmap[i];
101	10.5k	int resnum=info->residuesubmap[i];
102
103	10.5k	look->floor_func[i]=_floor_P[ci->floor_type[floornum]];
104	10.5k	look->floor_look[i]=look->floor_func[i]->
105	10.5k	look(vd,vm,ci->floor_param[floornum]);
106	10.5k	look->residue_func[i]=_residue_P[ci->residue_type[resnum]];
107	10.5k	look->residue_look[i]=look->residue_func[i]->
108	10.5k	look(vd,vm,ci->residue_param[resnum]);
109
110	10.5k	}
111
112	9.05k	look->ch=vi->channels;
113
114	9.05k	return(look);
115	9.05k	}
116
117	2.54k	static int ilog(unsigned int v){
118	2.54k	int ret=0;
119	2.54k	if(v)--v;
120	11.5k	while(v){
121	8.96k	ret++;
122	8.96k	v>>=1;
123	8.96k	}
124	2.54k	return(ret);
125	2.54k	}
126
127		/* also responsible for range checking */
128	7.75k	static vorbis_info_mapping mapping0_unpack(vorbis_info vi,oggpack_buffer *opb){
129	7.75k	int i,b;
130	7.75k	vorbis_info_mapping0 info=(vorbis_info_mapping0 )_ogg_calloc(1,sizeof(*info));
131	7.75k	codec_setup_info ci=(codec_setup_info )vi->codec_setup;
132	7.75k	memset(info,0,sizeof(*info));
133
134	7.75k	b=oggpack_read(opb,1);
135	7.75k	if(b<0)goto err_out;
136	7.75k	if(b){
137	382	info->submaps=oggpack_read(opb,4)+1;
138	382	if(info->submaps<=0)goto err_out;
139	382	}else
140	7.37k	info->submaps=1;
141
142	7.75k	b=oggpack_read(opb,1);
143	7.75k	if(b<0)goto err_out;
144	7.75k	if(b){
145	563	info->coupling_steps=oggpack_read(opb,8)+1;
146	563	if(info->coupling_steps<=0)goto err_out;
147	1.79k	for(i=0;i<info->coupling_steps;i++){
148	1.27k	int testM=info->coupling_mag[i]=oggpack_read(opb,ilog(vi->channels));
149	1.27k	int testA=info->coupling_ang[i]=oggpack_read(opb,ilog(vi->channels));
150
151	1.27k	if(testM<0 \|\|
152	1.25k	testA<0 \|\|
153	1.24k	testM==testA \|\|
154	1.23k	testM>=vi->channels \|\|
155	1.23k	testA>=vi->channels) goto err_out;
156	1.27k	}
157
158	561	}
159
160	7.70k	if(oggpack_read(opb,2)!=0)goto err_out; /* 2,3:reserved */
161
162	7.69k	if(info->submaps>1){
163	1.25k	for(i=0;i<vi->channels;i++){
164	982	info->chmuxlist[i]=oggpack_read(opb,4);
165	982	if(info->chmuxlist[i]>=info->submaps \|\| info->chmuxlist[i]<0)goto err_out;
166	982	}
167	289	}
168	16.0k	for(i=0;i<info->submaps;i++){
169	8.42k	int temp=oggpack_read(opb,8);
170	8.42k	if(temp>=ci->times)goto err_out;
171	8.42k	info->floorsubmap[i]=oggpack_read(opb,8);
172	8.42k	if(info->floorsubmap[i]>=ci->floors \|\| info->floorsubmap[i]<0)goto err_out;
173	8.40k	info->residuesubmap[i]=oggpack_read(opb,8);
174	8.40k	if(info->residuesubmap[i]>=ci->residues \|\| info->residuesubmap[i]<0)
175	17	goto err_out;
176	8.40k	}
177
178	7.64k	return info;
179
180	113	err_out:
181	113	mapping0_free_info(info);
182	113	return(NULL);
183	7.68k	}
184
185		static int seq=0;
186	43.3k	static int mapping0_inverse(vorbis_block vb,vorbis_look_mapping l){
187	43.3k	vorbis_dsp_state *vd=vb->vd;
188	43.3k	vorbis_info *vi=vd->vi;
189	43.3k	codec_setup_info ci=(codec_setup_info )vi->codec_setup;
190	43.3k	private_state b=(private_state )vd->backend_state;
191	43.3k	vorbis_look_mapping0 look=(vorbis_look_mapping0 )l;
192	43.3k	vorbis_info_mapping0 *info=look->map;
193
194	43.3k	int i,j;
195	43.3k	long n=vb->pcmend=ci->blocksizes[vb->W];
196
197	43.3k	ogg_int32_t pcmbundle=(ogg_int32_t )alloca(sizeof(pcmbundle)vi->channels);
198	43.3k	int zerobundle=(int )alloca(sizeof(zerobundle)vi->channels);
199
200	43.3k	int nonzero =(int )alloca(sizeof(nonzero)vi->channels);
201	43.3k	void floormemo=(void )alloca(sizeof(floormemo)vi->channels);
202
203		/* time domain information decode (note that applying the
204		information would have to happen later; we'll probably add a
205		function entry to the harness for that later */
206		/* NOT IMPLEMENTED */
207
208		/* recover the spectral envelope; store it in the PCM vector for now */
209	5.14M	for(i=0;i<vi->channels;i++){
210	5.09M	int submap=info->chmuxlist[i];
211	5.09M	floormemo[i]=look->floor_func[submap]->
212	5.09M	inverse1(vb,look->floor_look[submap]);
213	5.09M	if(floormemo[i])
214	94.6k	nonzero[i]=1;
215	5.00M	else
216	5.00M	nonzero[i]=0;
217	5.09M	memset(vb->pcm[i],0,sizeof(vb->pcm[i])n/2);
218	5.09M	}
219
220		/* channel coupling can 'dirty' the nonzero listing */
221	53.0k	for(i=0;i<info->coupling_steps;i++){
222	9.71k	if(nonzero[info->coupling_mag[i]] \|\|
223	7.75k	nonzero[info->coupling_ang[i]]){
224	4.58k	nonzero[info->coupling_mag[i]]=1;
225	4.58k	nonzero[info->coupling_ang[i]]=1;
226	4.58k	}
227	9.71k	}
228
229		/* recover the residue into our working vectors */
230	88.9k	for(i=0;i<info->submaps;i++){
231	45.6k	int ch_in_bundle=0;
232	5.14M	for(j=0;j<vi->channels;j++){
233	5.10M	if(info->chmuxlist[j]==i){
234	5.09M	if(nonzero[j])
235	98.7k	zerobundle[ch_in_bundle]=1;
236	5.00M	else
237	5.00M	zerobundle[ch_in_bundle]=0;
238	5.09M	pcmbundle[ch_in_bundle++]=vb->pcm[j];
239	5.09M	}
240	5.10M	}
241
242	45.6k	look->residue_func[i]->inverse(vb,look->residue_look[i],
243	45.6k	pcmbundle,zerobundle,ch_in_bundle);
244	45.6k	}
245
246		//for(j=0;j<vi->channels;j++)
247		//_analysis_output("coupled",seq+j,vb->pcm[j],-8,n/2,0,0);
248
249
250		/* channel coupling */
251	53.0k	for(i=info->coupling_steps-1;i>=0;i--){
252	9.71k	ogg_int32_t *pcmM=vb->pcm[info->coupling_mag[i]];
253	9.71k	ogg_int32_t *pcmA=vb->pcm[info->coupling_ang[i]];
254
255	3.44M	for(j=0;j<n/2;j++){
256	3.43M	ogg_int32_t mag=pcmM[j];
257	3.43M	ogg_int32_t ang=pcmA[j];
258
259	3.43M	if(mag>0)
260	15.7k	if(ang>0){
261	11.4k	pcmM[j]=mag;
262	11.4k	pcmA[j]=mag-ang;
263	11.4k	}else{
264	4.28k	pcmA[j]=mag;
265	4.28k	pcmM[j]=mag+ang;
266	4.28k	}
267	3.41M	else
268	3.41M	if(ang>0){
269	4.10k	pcmM[j]=mag;
270	4.10k	pcmA[j]=mag+ang;
271	3.41M	}else{
272	3.41M	pcmA[j]=mag;
273	3.41M	pcmM[j]=mag-ang;
274	3.41M	}
275	3.43M	}
276	9.71k	}
277
278		//for(j=0;j<vi->channels;j++)
279		//_analysis_output("residue",seq+j,vb->pcm[j],-8,n/2,0,0);
280
281		/* compute and apply spectral envelope */
282	5.14M	for(i=0;i<vi->channels;i++){
283	5.09M	ogg_int32_t *pcm=vb->pcm[i];
284	5.09M	int submap=info->chmuxlist[i];
285	5.09M	look->floor_func[submap]->
286	5.09M	inverse2(vb,look->floor_look[submap],floormemo[i],pcm);
287	5.09M	}
288
289		//for(j=0;j<vi->channels;j++)
290		//_analysis_output("mdct",seq+j,vb->pcm[j],-24,n/2,0,1);
291
292		/* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
293		/* only MDCT right now.... */
294	5.14M	for(i=0;i<vi->channels;i++){
295	5.09M	ogg_int32_t *pcm=vb->pcm[i];
296	5.09M	mdct_backward(n,pcm,pcm);
297	5.09M	}
298
299		//for(j=0;j<vi->channels;j++)
300		//_analysis_output("imdct",seq+j,vb->pcm[j],-24,n,0,0);
301
302		/* window the data */
303	5.14M	for(i=0;i<vi->channels;i++){
304	5.09M	ogg_int32_t *pcm=vb->pcm[i];
305	5.09M	if(nonzero[i])
306	98.7k	_vorbis_apply_window(pcm,b->window,ci->blocksizes,vb->lW,vb->W,vb->nW);
307	5.00M	else
308	6.42G	for(j=0;j<n;j++)
309	6.41G	pcm[j]=0;
310
311	5.09M	}
312
313		//for(j=0;j<vi->channels;j++)
314		//_analysis_output("window",seq+j,vb->pcm[j],-24,n,0,0);
315
316	43.3k	seq+=vi->channels;
317		/* all done! */
318	43.3k	return(0);
319	43.3k	}
320
321		/* export hooks */
322		vorbis_func_mapping mapping0_exportbundle={
323		&mapping0_unpack,
324		&mapping0_look,
325		&mapping0_free_info,
326		&mapping0_free_look,
327		&mapping0_inverse
328		};