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foxbox/lib/rbcodec/codecs/libtremor/mapping0.c
Sean Bartell f40bfc9267 Add codecs to librbcodec. 
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
2012-04-25 22:13:20 +02:00

416 lines
13 KiB
C
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/********************************************************************
* *
* 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 "config-tremor.h"
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "ogg.h"
#include "ivorbiscodec.h"
#include "codeclib.h"
#include "codec_internal.h"
#include "codebook.h"
#include "window.h"
#include "registry.h"
#include "misc.h"
#include <codecs/lib/codeclib.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=oggpack_read(opb,ilog(vi->channels));
info->coupling_mag[i]=testM;
int testA=oggpack_read(opb,ilog(vi->channels));
info->coupling_ang[i]=testA;
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);
}
#ifdef _ARM_ASSEM_
#define MAGANG( _mag, _ang )\
{\
register int temp;\
asm( "mov %[temp], %[ang]\n\t"\
"cmp %[mag], #0\n\t"\
"rsble %[temp], %[temp], #0\n\t"\
"cmp %[ang], #0\n\t"\
"subgt %[ang], %[mag], %[temp]\n\t"\
"movle %[ang], %[mag]\n\t"\
"addle %[mag], %[mag], %[temp]\n\t"\
: [mag] "+r" ( ( _mag ) ), [ang] "+r" ( ( _ang ) ), [temp] "=&r" (temp)\
:\
: "cc" );\
}
static inline void channel_couple(ogg_int32_t *pcmM, ogg_int32_t *pcmA, int n)
{
ogg_int32_t * const pcmMend = pcmM + n/2;
while(LIKELY(pcmM < pcmMend))
{
register int M0 asm("r2"),M1 asm("r3"),M2 asm("r4"),M3 asm("r5");
register int A0 asm("r6"),A1 asm("r7"),A2 asm("r8"),A3 asm("r9");
asm volatile( "ldmia %[pcmM], {%[M0], %[M1], %[M2], %[M3]}\n\t"
"ldmia %[pcmA], {%[A0], %[A1], %[A2], %[A3]}\n\t"
: [M0] "=r" (M0), [M1] "=r" (M1), [M2] "=r" (M2), [M3] "=r" (M3),
[A0] "=r" (A0), [A1] "=r" (A1), [A2] "=r" (A2), [A3] "=r" (A3)
: [pcmM] "r" (pcmM), [pcmA] "r" (pcmA)
: "memory" );
MAGANG( M0, A0 );
MAGANG( M1, A1 );
MAGANG( M2, A2 );
MAGANG( M3, A3 );
asm volatile( "stmia %[pcmM]!, {%[M0], %[M1], %[M2], %[M3]}\n\t"
"stmia %[pcmA]!, {%[A0], %[A1], %[A2], %[A3]}\n\t"
: [pcmM] "+r" (pcmM), [pcmA] "+r" (pcmA)
: [M0] "r" (M0), [M1] "r" (M1), [M2] "r" (M2), [M3] "r" (M3),
[A0] "r" (A0), [A1] "r" (A1), [A2] "r" (A2), [A3] "r" (A3)
: "memory" );
}
}
#elif defined CPU_COLDFIRE
#define MAGANG( _mag, _ang, _off )\
{\
asm volatile( "tst.l %[mag]\n\t"\
"bgt.s 1f\n\t"\
"neg.l %[ang]\n\t" /* neg sets cc so we might as well jump */ \
"ble.s 2f\n\t"\
".word 0x51fb\n\t" /* trapf.l, shadow next 2 insns */ \
/* if we didn't jump, the next test will */ \
/* false anyway */ \
"1:\n\t"\
"tst.l %[ang]\n\t"\
"bgt.s 2f\n\t"\
"add.l %[mag], %[ang]\n\t"\
"move.l %[ang], (" #_off ", %[pcmM])\n\t"\
".word 0x51fa\n\t" /* trapf.w, shadow next insn */ \
"2:\n\t"\
"sub.l %[ang], %[mag]\n\t"\
"move.l %[mag], (%[pcmA])+\n\t"\
: [mag] "+r" ( ( _mag ) ), [ang] "+d" ( ( _ang ) ),\
[pcmA] "+a" (pcmA)\
: [pcmM] "a" (pcmM)\
: "cc", "memory" );\
}
static inline void channel_couple(ogg_int32_t *pcmM, ogg_int32_t *pcmA, unsigned int n)
{
ogg_int32_t * const pcmMend = pcmM + n/2;
while(LIKELY(pcmM < pcmMend))
{
register int M0 asm("a2"),M1 asm("a3"),M2 asm("a4"),M3 asm("a5");
register int A0 asm("d2"),A1 asm("d3"),A2 asm("d4"),A3 asm("d5");
asm volatile( "movem.l (%[pcmM]), %[M0]-%[M3]\n\t"
"movem.l (%[pcmA]), %[A0]-%[A3]\n\t"
: [M0] "=r" (M0), [M1] "=r" (M1), [M2] "=r" (M2), [M3] "=r" (M3),
[A0] "=r" (A0), [A1] "=r" (A1), [A2] "=r" (A2), [A3] "=r" (A3)
: [pcmM] "a" (pcmM), [pcmA] "a" (pcmA) );
/* use offsets instead of autoinc since the store to pcmM is conditional */
MAGANG( M0, A0, 0 );
MAGANG( M1, A1, 4 );
MAGANG( M2, A2, 8 );
MAGANG( M3, A3, 12 );
asm volatile( "lea.l (4*4, %[pcmM]), %[pcmM]\n\t"
: [pcmM] "+a" (pcmM));
}
}
#else
static inline void channel_couple(ogg_int32_t *pcmM, ogg_int32_t *pcmA, int n)
{
int j;
for(j=0;j<n/2;j++){
ogg_int32_t mag = pcmM[j], ang = pcmA[j], _ang;
if(mag>0)
_ang = ang;
else
_ang = -ang;
if(ang>0)
pcmA[j]=mag-_ang;
else{
pcmA[j]=mag;
pcmM[j]=mag+_ang;
}
}
}
#endif
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;
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];
/* bounded mapping arrays instead of using alloca();
avoids memory leak; we can only deal with stereo anyway */
ogg_int32_t *pcmbundle[CHANNELS];
int zerobundle[CHANNELS];
int nonzero[CHANNELS];
void *floormemo[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(vd->floors + i * ci->blocksizes[vb->W]/2,0,sizeof(ogg_int32_t)*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++] = vd->floors + j * ci->blocksizes[vb->W]/2;
}
}
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 = vd->floors + info->coupling_mag[i] * ci->blocksizes[vb->W]/2;
ogg_int32_t *pcmA = vd->floors + info->coupling_ang[i] * ci->blocksizes[vb->W]/2;
channel_couple(pcmM,pcmA,n);
}
//for(j=0;j<vi->channels;j++)
//_analysis_output("residue",seq+j,vb->pcm[j],-8,n/2,0,0);
//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 = vd->floors + i*ci->blocksizes[vb->W]/2;
int submap=info->chmuxlist[i];
if(nonzero[i]) {
/* compute and apply spectral envelope */
look->floor_func[submap]->
inverse2(vb,look->floor_look[submap],floormemo[i],pcm);
ff_imdct_half(ci->blocksizes_nbits[vb->W],
(int32_t*)vd->residues[vd->ri] + i*ci->blocksizes[vb->W]/2,
(int32_t*)&vd->floors[i*ci->blocksizes[vb->W]/2]);
}
else
memset(vd->residues[vd->ri] + i*ci->blocksizes[vb->W]/2, 0, sizeof(ogg_int32_t)*n/2);
}
//for(j=0;j<vi->channels;j++)
//_analysis_output("imdct",seq+j,vb->pcm[j],-24,n,0,0);
//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 */
const vorbis_func_mapping mapping0_exportbundle ICONST_ATTR ={
&mapping0_unpack,
&mapping0_look,
&mapping0_free_info,
&mapping0_free_look,
&mapping0_inverse
};
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