mirror of
https://github.com/ctruLua/ctruLua.git
synced 2025-10-28 00:39:30 +00:00
e39fcc6c7b
Tremor is extremly similar to libogg but only uses integers (and doesn't provide an encoder). The playing problem with libvorbis was probably a float-precision related issue. No need for make build-all.
328 lines
9.3 KiB
C
328 lines
9.3 KiB
C
/********************************************************************
|
|
* *
|
|
* 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
|
|
};
|