mirror of
https://github.com/mpv-player/mpv
synced 2024-12-21 14:22:17 +00:00
fc91fed21e
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14281 b3059339-0415-0410-9bf9-f77b7e298cf2
439 lines
14 KiB
C
439 lines
14 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: floor backend 1 implementation
|
|
|
|
********************************************************************/
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
#include "ogg.h"
|
|
#include "ivorbiscodec.h"
|
|
#include "codec_internal.h"
|
|
#include "registry.h"
|
|
#include "codebook.h"
|
|
#include "misc.h"
|
|
|
|
#define floor1_rangedB 140 /* floor 1 fixed at -140dB to 0dB range */
|
|
|
|
typedef struct {
|
|
int forward_index[VIF_POSIT+2];
|
|
|
|
int hineighbor[VIF_POSIT];
|
|
int loneighbor[VIF_POSIT];
|
|
int posts;
|
|
|
|
int n;
|
|
int quant_q;
|
|
vorbis_info_floor1 *vi;
|
|
|
|
} vorbis_look_floor1;
|
|
|
|
/***********************************************/
|
|
|
|
static void floor1_free_info(vorbis_info_floor *i){
|
|
vorbis_info_floor1 *info=(vorbis_info_floor1 *)i;
|
|
if(info){
|
|
memset(info,0,sizeof(*info));
|
|
_ogg_free(info);
|
|
}
|
|
}
|
|
|
|
static void floor1_free_look(vorbis_look_floor *i){
|
|
vorbis_look_floor1 *look=(vorbis_look_floor1 *)i;
|
|
if(look){
|
|
memset(look,0,sizeof(*look));
|
|
_ogg_free(look);
|
|
}
|
|
}
|
|
|
|
static int ilog(unsigned int v){
|
|
int ret=0;
|
|
while(v){
|
|
ret++;
|
|
v>>=1;
|
|
}
|
|
return(ret);
|
|
}
|
|
|
|
static vorbis_info_floor *floor1_unpack (vorbis_info *vi,oggpack_buffer *opb){
|
|
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
|
|
int j,k,count=0,maxclass=-1,rangebits;
|
|
|
|
vorbis_info_floor1 *info=(vorbis_info_floor1 *)_ogg_calloc(1,sizeof(*info));
|
|
/* read partitions */
|
|
info->partitions=oggpack_read(opb,5); /* only 0 to 31 legal */
|
|
for(j=0;j<info->partitions;j++){
|
|
info->partitionclass[j]=oggpack_read(opb,4); /* only 0 to 15 legal */
|
|
if(maxclass<info->partitionclass[j])maxclass=info->partitionclass[j];
|
|
}
|
|
|
|
/* read partition classes */
|
|
for(j=0;j<maxclass+1;j++){
|
|
info->class_dim[j]=oggpack_read(opb,3)+1; /* 1 to 8 */
|
|
info->class_subs[j]=oggpack_read(opb,2); /* 0,1,2,3 bits */
|
|
if(info->class_subs[j]<0)
|
|
goto err_out;
|
|
if(info->class_subs[j])info->class_book[j]=oggpack_read(opb,8);
|
|
if(info->class_book[j]<0 || info->class_book[j]>=ci->books)
|
|
goto err_out;
|
|
for(k=0;k<(1<<info->class_subs[j]);k++){
|
|
info->class_subbook[j][k]=oggpack_read(opb,8)-1;
|
|
if(info->class_subbook[j][k]<-1 || info->class_subbook[j][k]>=ci->books)
|
|
goto err_out;
|
|
}
|
|
}
|
|
|
|
/* read the post list */
|
|
info->mult=oggpack_read(opb,2)+1; /* only 1,2,3,4 legal now */
|
|
rangebits=oggpack_read(opb,4);
|
|
|
|
for(j=0,k=0;j<info->partitions;j++){
|
|
count+=info->class_dim[info->partitionclass[j]];
|
|
for(;k<count;k++){
|
|
int t=info->postlist[k+2]=oggpack_read(opb,rangebits);
|
|
if(t<0 || t>=(1<<rangebits))
|
|
goto err_out;
|
|
}
|
|
}
|
|
info->postlist[0]=0;
|
|
info->postlist[1]=1<<rangebits;
|
|
|
|
return(info);
|
|
|
|
err_out:
|
|
floor1_free_info(info);
|
|
return(NULL);
|
|
}
|
|
|
|
static int icomp(const void *a,const void *b){
|
|
return(**(int **)a-**(int **)b);
|
|
}
|
|
|
|
static vorbis_look_floor *floor1_look(vorbis_dsp_state *vd,vorbis_info_mode *mi,
|
|
vorbis_info_floor *in){
|
|
|
|
int *sortpointer[VIF_POSIT+2];
|
|
vorbis_info_floor1 *info=(vorbis_info_floor1 *)in;
|
|
vorbis_look_floor1 *look=(vorbis_look_floor1 *)_ogg_calloc(1,sizeof(*look));
|
|
int i,j,n=0;
|
|
|
|
look->vi=info;
|
|
look->n=info->postlist[1];
|
|
|
|
/* we drop each position value in-between already decoded values,
|
|
and use linear interpolation to predict each new value past the
|
|
edges. The positions are read in the order of the position
|
|
list... we precompute the bounding positions in the lookup. Of
|
|
course, the neighbors can change (if a position is declined), but
|
|
this is an initial mapping */
|
|
|
|
for(i=0;i<info->partitions;i++)n+=info->class_dim[info->partitionclass[i]];
|
|
n+=2;
|
|
look->posts=n;
|
|
|
|
/* also store a sorted position index */
|
|
for(i=0;i<n;i++)sortpointer[i]=info->postlist+i;
|
|
qsort(sortpointer,n,sizeof(*sortpointer),icomp);
|
|
|
|
/* points from sort order back to range number */
|
|
for(i=0;i<n;i++)look->forward_index[i]=sortpointer[i]-info->postlist;
|
|
|
|
/* quantize values to multiplier spec */
|
|
switch(info->mult){
|
|
case 1: /* 1024 -> 256 */
|
|
look->quant_q=256;
|
|
break;
|
|
case 2: /* 1024 -> 128 */
|
|
look->quant_q=128;
|
|
break;
|
|
case 3: /* 1024 -> 86 */
|
|
look->quant_q=86;
|
|
break;
|
|
case 4: /* 1024 -> 64 */
|
|
look->quant_q=64;
|
|
break;
|
|
}
|
|
|
|
/* discover our neighbors for decode where we don't use fit flags
|
|
(that would push the neighbors outward) */
|
|
for(i=0;i<n-2;i++){
|
|
int lo=0;
|
|
int hi=1;
|
|
int lx=0;
|
|
int hx=look->n;
|
|
int currentx=info->postlist[i+2];
|
|
for(j=0;j<i+2;j++){
|
|
int x=info->postlist[j];
|
|
if(x>lx && x<currentx){
|
|
lo=j;
|
|
lx=x;
|
|
}
|
|
if(x<hx && x>currentx){
|
|
hi=j;
|
|
hx=x;
|
|
}
|
|
}
|
|
look->loneighbor[i]=lo;
|
|
look->hineighbor[i]=hi;
|
|
}
|
|
|
|
return(look);
|
|
}
|
|
|
|
static int render_point(int x0,int x1,int y0,int y1,int x){
|
|
y0&=0x7fff; /* mask off flag */
|
|
y1&=0x7fff;
|
|
|
|
{
|
|
int dy=y1-y0;
|
|
int adx=x1-x0;
|
|
int ady=abs(dy);
|
|
int err=ady*(x-x0);
|
|
|
|
int off=err/adx;
|
|
if(dy<0)return(y0-off);
|
|
return(y0+off);
|
|
}
|
|
}
|
|
|
|
#ifdef _LOW_ACCURACY_
|
|
# define XdB(n) ((((n)>>8)+1)>>1)
|
|
#else
|
|
# define XdB(n) (n)
|
|
#endif
|
|
|
|
static const ogg_int32_t FLOOR_fromdB_LOOKUP[256]={
|
|
XdB(0x000000e5), XdB(0x000000f4), XdB(0x00000103), XdB(0x00000114),
|
|
XdB(0x00000126), XdB(0x00000139), XdB(0x0000014e), XdB(0x00000163),
|
|
XdB(0x0000017a), XdB(0x00000193), XdB(0x000001ad), XdB(0x000001c9),
|
|
XdB(0x000001e7), XdB(0x00000206), XdB(0x00000228), XdB(0x0000024c),
|
|
XdB(0x00000272), XdB(0x0000029b), XdB(0x000002c6), XdB(0x000002f4),
|
|
XdB(0x00000326), XdB(0x0000035a), XdB(0x00000392), XdB(0x000003cd),
|
|
XdB(0x0000040c), XdB(0x00000450), XdB(0x00000497), XdB(0x000004e4),
|
|
XdB(0x00000535), XdB(0x0000058c), XdB(0x000005e8), XdB(0x0000064a),
|
|
XdB(0x000006b3), XdB(0x00000722), XdB(0x00000799), XdB(0x00000818),
|
|
XdB(0x0000089e), XdB(0x0000092e), XdB(0x000009c6), XdB(0x00000a69),
|
|
XdB(0x00000b16), XdB(0x00000bcf), XdB(0x00000c93), XdB(0x00000d64),
|
|
XdB(0x00000e43), XdB(0x00000f30), XdB(0x0000102d), XdB(0x0000113a),
|
|
XdB(0x00001258), XdB(0x0000138a), XdB(0x000014cf), XdB(0x00001629),
|
|
XdB(0x0000179a), XdB(0x00001922), XdB(0x00001ac4), XdB(0x00001c82),
|
|
XdB(0x00001e5c), XdB(0x00002055), XdB(0x0000226f), XdB(0x000024ac),
|
|
XdB(0x0000270e), XdB(0x00002997), XdB(0x00002c4b), XdB(0x00002f2c),
|
|
XdB(0x0000323d), XdB(0x00003581), XdB(0x000038fb), XdB(0x00003caf),
|
|
XdB(0x000040a0), XdB(0x000044d3), XdB(0x0000494c), XdB(0x00004e10),
|
|
XdB(0x00005323), XdB(0x0000588a), XdB(0x00005e4b), XdB(0x0000646b),
|
|
XdB(0x00006af2), XdB(0x000071e5), XdB(0x0000794c), XdB(0x0000812e),
|
|
XdB(0x00008993), XdB(0x00009283), XdB(0x00009c09), XdB(0x0000a62d),
|
|
XdB(0x0000b0f9), XdB(0x0000bc79), XdB(0x0000c8b9), XdB(0x0000d5c4),
|
|
XdB(0x0000e3a9), XdB(0x0000f274), XdB(0x00010235), XdB(0x000112fd),
|
|
XdB(0x000124dc), XdB(0x000137e4), XdB(0x00014c29), XdB(0x000161bf),
|
|
XdB(0x000178bc), XdB(0x00019137), XdB(0x0001ab4a), XdB(0x0001c70e),
|
|
XdB(0x0001e4a1), XdB(0x0002041f), XdB(0x000225aa), XdB(0x00024962),
|
|
XdB(0x00026f6d), XdB(0x000297f0), XdB(0x0002c316), XdB(0x0002f109),
|
|
XdB(0x000321f9), XdB(0x00035616), XdB(0x00038d97), XdB(0x0003c8b4),
|
|
XdB(0x000407a7), XdB(0x00044ab2), XdB(0x00049218), XdB(0x0004de23),
|
|
XdB(0x00052f1e), XdB(0x0005855c), XdB(0x0005e135), XdB(0x00064306),
|
|
XdB(0x0006ab33), XdB(0x00071a24), XdB(0x0007904b), XdB(0x00080e20),
|
|
XdB(0x00089422), XdB(0x000922da), XdB(0x0009bad8), XdB(0x000a5cb6),
|
|
XdB(0x000b091a), XdB(0x000bc0b1), XdB(0x000c8436), XdB(0x000d5471),
|
|
XdB(0x000e3233), XdB(0x000f1e5f), XdB(0x001019e4), XdB(0x001125c1),
|
|
XdB(0x00124306), XdB(0x001372d5), XdB(0x0014b663), XdB(0x00160ef7),
|
|
XdB(0x00177df0), XdB(0x001904c1), XdB(0x001aa4f9), XdB(0x001c603d),
|
|
XdB(0x001e384f), XdB(0x00202f0f), XdB(0x0022467a), XdB(0x002480b1),
|
|
XdB(0x0026dff7), XdB(0x002966b3), XdB(0x002c1776), XdB(0x002ef4fc),
|
|
XdB(0x0032022d), XdB(0x00354222), XdB(0x0038b828), XdB(0x003c67c2),
|
|
XdB(0x004054ae), XdB(0x004482e8), XdB(0x0048f6af), XdB(0x004db488),
|
|
XdB(0x0052c142), XdB(0x005821ff), XdB(0x005ddc33), XdB(0x0063f5b0),
|
|
XdB(0x006a74a7), XdB(0x00715faf), XdB(0x0078bdce), XdB(0x0080967f),
|
|
XdB(0x0088f1ba), XdB(0x0091d7f9), XdB(0x009b5247), XdB(0x00a56a41),
|
|
XdB(0x00b02a27), XdB(0x00bb9ce2), XdB(0x00c7ce12), XdB(0x00d4ca17),
|
|
XdB(0x00e29e20), XdB(0x00f15835), XdB(0x0101074b), XdB(0x0111bb4e),
|
|
XdB(0x01238531), XdB(0x01367704), XdB(0x014aa402), XdB(0x016020a7),
|
|
XdB(0x017702c3), XdB(0x018f6190), XdB(0x01a955cb), XdB(0x01c4f9cf),
|
|
XdB(0x01e269a8), XdB(0x0201c33b), XdB(0x0223265a), XdB(0x0246b4ea),
|
|
XdB(0x026c9302), XdB(0x0294e716), XdB(0x02bfda13), XdB(0x02ed9793),
|
|
XdB(0x031e4e09), XdB(0x03522ee4), XdB(0x03896ed0), XdB(0x03c445e2),
|
|
XdB(0x0402efd6), XdB(0x0445ac4b), XdB(0x048cbefc), XdB(0x04d87013),
|
|
XdB(0x05290c67), XdB(0x057ee5ca), XdB(0x05da5364), XdB(0x063bb204),
|
|
XdB(0x06a36485), XdB(0x0711d42b), XdB(0x0787710e), XdB(0x0804b299),
|
|
XdB(0x088a17ef), XdB(0x0918287e), XdB(0x09af747c), XdB(0x0a50957e),
|
|
XdB(0x0afc2f19), XdB(0x0bb2ef7f), XdB(0x0c759034), XdB(0x0d44d6ca),
|
|
XdB(0x0e2195bc), XdB(0x0f0cad0d), XdB(0x10070b62), XdB(0x1111aeea),
|
|
XdB(0x122da66c), XdB(0x135c120f), XdB(0x149e24d9), XdB(0x15f525b1),
|
|
XdB(0x176270e3), XdB(0x18e7794b), XdB(0x1a85c9ae), XdB(0x1c3f06d1),
|
|
XdB(0x1e14f07d), XdB(0x200963d7), XdB(0x221e5ccd), XdB(0x2455f870),
|
|
XdB(0x26b2770b), XdB(0x29363e2b), XdB(0x2be3db5c), XdB(0x2ebe06b6),
|
|
XdB(0x31c7a55b), XdB(0x3503ccd4), XdB(0x3875c5aa), XdB(0x3c210f44),
|
|
XdB(0x4009632b), XdB(0x4432b8cf), XdB(0x48a149bc), XdB(0x4d59959e),
|
|
XdB(0x52606733), XdB(0x57bad899), XdB(0x5d6e593a), XdB(0x6380b298),
|
|
XdB(0x69f80e9a), XdB(0x70dafda8), XdB(0x78307d76), XdB(0x7fffffff),
|
|
};
|
|
|
|
static void render_line(int x0,int x1,int y0,int y1,ogg_int32_t *d){
|
|
int dy=y1-y0;
|
|
int adx=x1-x0;
|
|
int ady=abs(dy);
|
|
int base=dy/adx;
|
|
int sy=(dy<0?base-1:base+1);
|
|
int x=x0;
|
|
int y=y0;
|
|
int err=0;
|
|
|
|
ady-=abs(base*adx);
|
|
|
|
d[x]= MULT31_SHIFT15(d[x],FLOOR_fromdB_LOOKUP[y]);
|
|
|
|
while(++x<x1){
|
|
err=err+ady;
|
|
if(err>=adx){
|
|
err-=adx;
|
|
y+=sy;
|
|
}else{
|
|
y+=base;
|
|
}
|
|
d[x]= MULT31_SHIFT15(d[x],FLOOR_fromdB_LOOKUP[y]);
|
|
}
|
|
}
|
|
|
|
static void *floor1_inverse1(vorbis_block *vb,vorbis_look_floor *in){
|
|
vorbis_look_floor1 *look=(vorbis_look_floor1 *)in;
|
|
vorbis_info_floor1 *info=look->vi;
|
|
codec_setup_info *ci=(codec_setup_info *)vb->vd->vi->codec_setup;
|
|
|
|
int i,j,k;
|
|
codebook *books=ci->fullbooks;
|
|
|
|
/* unpack wrapped/predicted values from stream */
|
|
if(oggpack_read(&vb->opb,1)==1){
|
|
int *fit_value=(int *)_vorbis_block_alloc(vb,(look->posts)*sizeof(*fit_value));
|
|
|
|
fit_value[0]=oggpack_read(&vb->opb,ilog(look->quant_q-1));
|
|
fit_value[1]=oggpack_read(&vb->opb,ilog(look->quant_q-1));
|
|
|
|
/* partition by partition */
|
|
/* partition by partition */
|
|
for(i=0,j=2;i<info->partitions;i++){
|
|
int classv=info->partitionclass[i];
|
|
int cdim=info->class_dim[classv];
|
|
int csubbits=info->class_subs[classv];
|
|
int csub=1<<csubbits;
|
|
int cval=0;
|
|
|
|
/* decode the partition's first stage cascade value */
|
|
if(csubbits){
|
|
cval=vorbis_book_decode(books+info->class_book[classv],&vb->opb);
|
|
|
|
if(cval==-1)goto eop;
|
|
}
|
|
|
|
for(k=0;k<cdim;k++){
|
|
int book=info->class_subbook[classv][cval&(csub-1)];
|
|
cval>>=csubbits;
|
|
if(book>=0){
|
|
if((fit_value[j+k]=vorbis_book_decode(books+book,&vb->opb))==-1)
|
|
goto eop;
|
|
}else{
|
|
fit_value[j+k]=0;
|
|
}
|
|
}
|
|
j+=cdim;
|
|
}
|
|
|
|
/* unwrap positive values and reconsitute via linear interpolation */
|
|
for(i=2;i<look->posts;i++){
|
|
int predicted=render_point(info->postlist[look->loneighbor[i-2]],
|
|
info->postlist[look->hineighbor[i-2]],
|
|
fit_value[look->loneighbor[i-2]],
|
|
fit_value[look->hineighbor[i-2]],
|
|
info->postlist[i]);
|
|
int hiroom=look->quant_q-predicted;
|
|
int loroom=predicted;
|
|
int room=(hiroom<loroom?hiroom:loroom)<<1;
|
|
int val=fit_value[i];
|
|
|
|
if(val){
|
|
if(val>=room){
|
|
if(hiroom>loroom){
|
|
val = val-loroom;
|
|
}else{
|
|
val = -1-(val-hiroom);
|
|
}
|
|
}else{
|
|
if(val&1){
|
|
val= -((val+1)>>1);
|
|
}else{
|
|
val>>=1;
|
|
}
|
|
}
|
|
|
|
fit_value[i]=val+predicted;
|
|
fit_value[look->loneighbor[i-2]]&=0x7fff;
|
|
fit_value[look->hineighbor[i-2]]&=0x7fff;
|
|
|
|
}else{
|
|
fit_value[i]=predicted|0x8000;
|
|
}
|
|
|
|
}
|
|
|
|
return(fit_value);
|
|
}
|
|
eop:
|
|
return(NULL);
|
|
}
|
|
|
|
static int floor1_inverse2(vorbis_block *vb,vorbis_look_floor *in,void *memo,
|
|
ogg_int32_t *out){
|
|
vorbis_look_floor1 *look=(vorbis_look_floor1 *)in;
|
|
vorbis_info_floor1 *info=look->vi;
|
|
|
|
codec_setup_info *ci=(codec_setup_info *)vb->vd->vi->codec_setup;
|
|
int n=ci->blocksizes[vb->W]/2;
|
|
int j;
|
|
|
|
if(memo){
|
|
/* render the lines */
|
|
int *fit_value=(int *)memo;
|
|
int hx=0;
|
|
int lx=0;
|
|
int ly=fit_value[0]*info->mult;
|
|
for(j=1;j<look->posts;j++){
|
|
int current=look->forward_index[j];
|
|
int hy=fit_value[current]&0x7fff;
|
|
if(hy==fit_value[current]){
|
|
|
|
hy*=info->mult;
|
|
hx=info->postlist[current];
|
|
|
|
render_line(lx,hx,ly,hy,out);
|
|
|
|
lx=hx;
|
|
ly=hy;
|
|
}
|
|
}
|
|
for(j=hx;j<n;j++)out[j]*=ly; /* be certain */
|
|
return(1);
|
|
}
|
|
memset(out,0,sizeof(*out)*n);
|
|
return(0);
|
|
}
|
|
|
|
/* export hooks */
|
|
vorbis_func_floor floor1_exportbundle={
|
|
&floor1_unpack,&floor1_look,&floor1_free_info,
|
|
&floor1_free_look,&floor1_inverse1,&floor1_inverse2
|
|
};
|
|
|