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/********************************************************************
* *
* THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
* THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
* PLEASE READ THESE TERMS DISTRIBUTING. *
* *
* THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
* by Monty <monty@xiph.org> and The XIPHOPHORUS Company *
* http://www.xiph.org/ *
* *
********************************************************************
function: libvorbis backend and mapping structures; needed for
static mode headers
last mod: $Id: backends.h,v 1.7.4.4 2000/04/21 16:35:38 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_time_backend_h_
#define _vorbis_time_backend_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 *);
void (*free_info) (vorbis_info_time *);
void (*free_look) (vorbis_look_time *);
int (*forward) (struct vorbis_block *,vorbis_look_time *,
double *,double *);
int (*inverse) (struct vorbis_block *,vorbis_look_time *,
double *,double *);
} 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 *);
void (*free_info) (vorbis_info_floor *);
void (*free_look) (vorbis_look_floor *);
int (*forward) (struct vorbis_block *,vorbis_look_floor *,
double *,double *);
int (*inverse) (struct vorbis_block *,vorbis_look_floor *,
double *);
} vorbis_func_floor;
typedef struct{
int order;
long rate;
long barkmap;
int ampbits;
int ampdB;
int numbooks; /* <= 16 */
int books[16];
} vorbis_info_floor0;
/* 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 *);
void (*free_info) (vorbis_info_residue *);
void (*free_look) (vorbis_look_residue *);
int (*forward) (struct vorbis_block *,vorbis_look_residue *,
double **,int);
int (*inverse) (struct vorbis_block *,vorbis_look_residue *,
double **,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 ofr a partition */
int groupbook; /* huffbook for partitioning */
double ampmax[64]; /* book amp threshholds for *encode* */
int secondstages[64]; /* expanded out to pointers in lookup */
long addmullist[64]; /* bitflags for add/mul cascading */
int booklist[256]; /* list of second stage books */
} 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 *);
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 psysubmap[16]; /* [mux]; encode only */
} vorbis_info_mapping0;
#endif
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