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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE 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 SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
* by the XIPHOPHORUS Company http://www.xiph.org/ *
* *
********************************************************************
function: libvorbis backend and mapping structures; needed for
static mode headers
last mod: $Id: backends.h,v 1.12.2.1 2002/01/01 02:27:23 xiphmont Exp $
********************************************************************/
/* this is exposed up here because we need it for static modes.
Lookups for each backend aren't exposed because there's no reason
to do so */
#ifndef _vorbis_backend_h_
#define _vorbis_backend_h_
#include "codec_internal.h"
/* this would all be simpler/shorter with templates, but.... */
/* Transform backend generic *************************************/
/* only mdct right now. Flesh it out more if we ever transcend mdct
in the transform domain */
/* Time backend generic ******************************************/
typedef struct{
void (*pack) (vorbis_info_time *,oggpack_buffer *);
vorbis_info_time *(*unpack)(vorbis_info *,oggpack_buffer *);
vorbis_look_time *(*look) (vorbis_dsp_state *,vorbis_info_mode *,
vorbis_info_time *);
vorbis_info_time *(*copy_info)(vorbis_info_time *);
void (*free_info) (vorbis_info_time *);
void (*free_look) (vorbis_look_time *);
int (*forward) (struct vorbis_block *,vorbis_look_time *,
float *,float *);
int (*inverse) (struct vorbis_block *,vorbis_look_time *,
float *,float *);
} vorbis_func_time;
typedef struct{
int dummy;
} vorbis_info_time0;
/* Floor backend generic *****************************************/
typedef struct{
void (*pack) (vorbis_info_floor *,oggpack_buffer *);
vorbis_info_floor *(*unpack)(vorbis_info *,oggpack_buffer *);
vorbis_look_floor *(*look) (vorbis_dsp_state *,vorbis_info_mode *,
vorbis_info_floor *);
vorbis_info_floor *(*copy_info)(vorbis_info_floor *);
void (*free_info) (vorbis_info_floor *);
void (*free_look) (vorbis_look_floor *);
int (*forward) (struct vorbis_block *,vorbis_look_floor *,
float *, const float *, /* in */
const float *, const float *, /* in */
float *); /* out */
void *(*inverse1) (struct vorbis_block *,vorbis_look_floor *);
int (*inverse2) (struct vorbis_block *,vorbis_look_floor *,
void *buffer,float *);
} vorbis_func_floor;
typedef struct{
int order;
long rate;
long barkmap;
int ampbits;
int ampdB;
int numbooks; /* <= 16 */
int books[16];
float lessthan; /* encode-only config setting hacks for libvorbis */
float greaterthan; /* encode-only config setting hacks for libvorbis */
} vorbis_info_floor0;
#define VIF_POSIT 63
#define VIF_CLASS 16
#define VIF_PARTS 31
typedef struct{
int partitions; /* 0 to 31 */
int partitionclass[VIF_PARTS]; /* 0 to 15 */
int class_dim[VIF_CLASS]; /* 1 to 8 */
int class_subs[VIF_CLASS]; /* 0,1,2,3 (bits: 1<<n poss) */
int class_book[VIF_CLASS]; /* subs ^ dim entries */
int class_subbook[VIF_CLASS][8]; /* [VIF_CLASS][subs] */
int mult; /* 1 2 3 or 4 */
int postlist[VIF_POSIT+2]; /* first two implicit */
/* encode side analysis parameters */
float maxover;
float maxunder;
float maxerr;
int twofitminsize;
int twofitminused;
int twofitweight;
float twofitatten;
int unusedminsize;
int unusedmin_n;
int n;
} vorbis_info_floor1;
/* Residue backend generic *****************************************/
typedef struct{
void (*pack) (vorbis_info_residue *,oggpack_buffer *);
vorbis_info_residue *(*unpack)(vorbis_info *,oggpack_buffer *);
vorbis_look_residue *(*look) (vorbis_dsp_state *,vorbis_info_mode *,
vorbis_info_residue *);
vorbis_info_residue *(*copy_info)(vorbis_info_residue *);
void (*free_info) (vorbis_info_residue *);
void (*free_look) (vorbis_look_residue *);
long **(*class) (struct vorbis_block *,vorbis_look_residue *,
float **,float **,int *,int);
int (*forward) (struct vorbis_block *,vorbis_look_residue *,
float **,float **,int *,int,int,long **,ogg_uint32_t *);
int (*inverse) (struct vorbis_block *,vorbis_look_residue *,
float **,int *,int);
} vorbis_func_residue;
typedef struct vorbis_info_residue0{
/* block-partitioned VQ coded straight residue */
long begin;
long end;
/* first stage (lossless partitioning) */
int grouping; /* group n vectors per partition */
int partitions; /* possible codebooks for a partition */
int groupbook; /* huffbook for partitioning */
int secondstages[64]; /* expanded out to pointers in lookup */
int booklist[256]; /* list of second stage books */
/* encode-only heuristic settings */
float ampmax[64]; /* book amp threshholds*/
int subgrp[64]; /* book heuristic subgroup size */
int blimit[64]; /* subgroup position limits */
} vorbis_info_residue0;
/* Mapping backend generic *****************************************/
typedef struct{
void (*pack) (vorbis_info *,vorbis_info_mapping *,
oggpack_buffer *);
vorbis_info_mapping *(*unpack)(vorbis_info *,oggpack_buffer *);
vorbis_look_mapping *(*look) (vorbis_dsp_state *,vorbis_info_mode *,
vorbis_info_mapping *);
vorbis_info_mapping *(*copy_info)(vorbis_info_mapping *);
void (*free_info) (vorbis_info_mapping *);
void (*free_look) (vorbis_look_mapping *);
int (*forward) (struct vorbis_block *vb,vorbis_look_mapping *);
int (*inverse) (struct vorbis_block *vb,vorbis_look_mapping *);
} vorbis_func_mapping;
typedef struct vorbis_info_mapping0{
int submaps; /* <= 16 */
int chmuxlist[256]; /* up to 256 channels in a Vorbis stream */
int timesubmap[16]; /* [mux] */
int floorsubmap[16]; /* [mux] submap to floors */
int residuesubmap[16]; /* [mux] submap to residue */
int psy[2]; /* by blocktype; impulse/padding for short,
transition/normal for long */
int coupling_steps;
int coupling_mag[256];
int coupling_ang[256];
} vorbis_info_mapping0;
#endif
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