Chris@1: /********************************************************************
Chris@1:  *                                                                  *
Chris@1:  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
Chris@1:  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
Chris@1:  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
Chris@1:  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
Chris@1:  *                                                                  *
Chris@1:  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009             *
Chris@1:  * by the Xiph.Org Foundation http://www.xiph.org/                  *
Chris@1:  *                                                                  *
Chris@1:  ********************************************************************
Chris@1: 
Chris@1:  function: libvorbis backend and mapping structures; needed for
Chris@1:            static mode headers
Chris@1:  last mod: $Id: backends.h 16962 2010-03-11 07:30:34Z xiphmont $
Chris@1: 
Chris@1:  ********************************************************************/
Chris@1: 
Chris@1: /* this is exposed up here because we need it for static modes.
Chris@1:    Lookups for each backend aren't exposed because there's no reason
Chris@1:    to do so */
Chris@1: 
Chris@1: #ifndef _vorbis_backend_h_
Chris@1: #define _vorbis_backend_h_
Chris@1: 
Chris@1: #include "codec_internal.h"
Chris@1: 
Chris@1: /* this would all be simpler/shorter with templates, but.... */
Chris@1: /* Floor backend generic *****************************************/
Chris@1: typedef struct{
Chris@1:   void                   (*pack)  (vorbis_info_floor *,oggpack_buffer *);
Chris@1:   vorbis_info_floor     *(*unpack)(vorbis_info *,oggpack_buffer *);
Chris@1:   vorbis_look_floor     *(*look)  (vorbis_dsp_state *,vorbis_info_floor *);
Chris@1:   void (*free_info) (vorbis_info_floor *);
Chris@1:   void (*free_look) (vorbis_look_floor *);
Chris@1:   void *(*inverse1)  (struct vorbis_block *,vorbis_look_floor *);
Chris@1:   int   (*inverse2)  (struct vorbis_block *,vorbis_look_floor *,
Chris@1:                      void *buffer,float *);
Chris@1: } vorbis_func_floor;
Chris@1: 
Chris@1: typedef struct{
Chris@1:   int   order;
Chris@1:   long  rate;
Chris@1:   long  barkmap;
Chris@1: 
Chris@1:   int   ampbits;
Chris@1:   int   ampdB;
Chris@1: 
Chris@1:   int   numbooks; /* <= 16 */
Chris@1:   int   books[16];
Chris@1: 
Chris@1:   float lessthan;     /* encode-only config setting hacks for libvorbis */
Chris@1:   float greaterthan;  /* encode-only config setting hacks for libvorbis */
Chris@1: 
Chris@1: } vorbis_info_floor0;
Chris@1: 
Chris@1: 
Chris@1: #define VIF_POSIT 63
Chris@1: #define VIF_CLASS 16
Chris@1: #define VIF_PARTS 31
Chris@1: typedef struct{
Chris@1:   int   partitions;                /* 0 to 31 */
Chris@1:   int   partitionclass[VIF_PARTS]; /* 0 to 15 */
Chris@1: 
Chris@1:   int   class_dim[VIF_CLASS];        /* 1 to 8 */
Chris@1:   int   class_subs[VIF_CLASS];       /* 0,1,2,3 (bits: 1<<n poss) */
Chris@1:   int   class_book[VIF_CLASS];       /* subs ^ dim entries */
Chris@1:   int   class_subbook[VIF_CLASS][8]; /* [VIF_CLASS][subs] */
Chris@1: 
Chris@1: 
Chris@1:   int   mult;                      /* 1 2 3 or 4 */
Chris@1:   int   postlist[VIF_POSIT+2];    /* first two implicit */
Chris@1: 
Chris@1: 
Chris@1:   /* encode side analysis parameters */
Chris@1:   float maxover;
Chris@1:   float maxunder;
Chris@1:   float maxerr;
Chris@1: 
Chris@1:   float twofitweight;
Chris@1:   float twofitatten;
Chris@1: 
Chris@1:   int   n;
Chris@1: 
Chris@1: } vorbis_info_floor1;
Chris@1: 
Chris@1: /* Residue backend generic *****************************************/
Chris@1: typedef struct{
Chris@1:   void                 (*pack)  (vorbis_info_residue *,oggpack_buffer *);
Chris@1:   vorbis_info_residue *(*unpack)(vorbis_info *,oggpack_buffer *);
Chris@1:   vorbis_look_residue *(*look)  (vorbis_dsp_state *,
Chris@1:                                  vorbis_info_residue *);
Chris@1:   void (*free_info)    (vorbis_info_residue *);
Chris@1:   void (*free_look)    (vorbis_look_residue *);
Chris@1:   long **(*class)      (struct vorbis_block *,vorbis_look_residue *,
Chris@1:                         int **,int *,int);
Chris@1:   int  (*forward)      (oggpack_buffer *,struct vorbis_block *,
Chris@1:                         vorbis_look_residue *,
Chris@1:                         int **,int *,int,long **,int);
Chris@1:   int  (*inverse)      (struct vorbis_block *,vorbis_look_residue *,
Chris@1:                         float **,int *,int);
Chris@1: } vorbis_func_residue;
Chris@1: 
Chris@1: typedef struct vorbis_info_residue0{
Chris@1: /* block-partitioned VQ coded straight residue */
Chris@1:   long  begin;
Chris@1:   long  end;
Chris@1: 
Chris@1:   /* first stage (lossless partitioning) */
Chris@1:   int    grouping;         /* group n vectors per partition */
Chris@1:   int    partitions;       /* possible codebooks for a partition */
Chris@1:   int    partvals;         /* partitions ^ groupbook dim */
Chris@1:   int    groupbook;        /* huffbook for partitioning */
Chris@1:   int    secondstages[64]; /* expanded out to pointers in lookup */
Chris@1:   int    booklist[512];    /* list of second stage books */
Chris@1: 
Chris@1:   const int classmetric1[64];
Chris@1:   const int classmetric2[64];
Chris@1: } vorbis_info_residue0;
Chris@1: 
Chris@1: /* Mapping backend generic *****************************************/
Chris@1: typedef struct{
Chris@1:   void                 (*pack)  (vorbis_info *,vorbis_info_mapping *,
Chris@1:                                  oggpack_buffer *);
Chris@1:   vorbis_info_mapping *(*unpack)(vorbis_info *,oggpack_buffer *);
Chris@1:   void (*free_info)    (vorbis_info_mapping *);
Chris@1:   int  (*forward)      (struct vorbis_block *vb);
Chris@1:   int  (*inverse)      (struct vorbis_block *vb,vorbis_info_mapping *);
Chris@1: } vorbis_func_mapping;
Chris@1: 
Chris@1: typedef struct vorbis_info_mapping0{
Chris@1:   int   submaps;  /* <= 16 */
Chris@1:   int   chmuxlist[256];   /* up to 256 channels in a Vorbis stream */
Chris@1: 
Chris@1:   int   floorsubmap[16];   /* [mux] submap to floors */
Chris@1:   int   residuesubmap[16]; /* [mux] submap to residue */
Chris@1: 
Chris@1:   int   coupling_steps;
Chris@1:   int   coupling_mag[256];
Chris@1:   int   coupling_ang[256];
Chris@1: 
Chris@1: } vorbis_info_mapping0;
Chris@1: 
Chris@1: #endif