1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/vorbis/backends.h	Sun Nov 01 00:36:56 2015 +0200
     1.3 @@ -0,0 +1,144 @@
     1.4 +/********************************************************************
     1.5 + *                                                                  *
     1.6 + * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
     1.7 + * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
     1.8 + * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
     1.9 + * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
    1.10 + *                                                                  *
    1.11 + * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009             *
    1.12 + * by the Xiph.Org Foundation http://www.xiph.org/                  *
    1.13 + *                                                                  *
    1.14 + ********************************************************************
    1.15 +
    1.16 + function: libvorbis backend and mapping structures; needed for
    1.17 +           static mode headers
    1.18 + last mod: $Id: backends.h 16962 2010-03-11 07:30:34Z xiphmont $
    1.19 +
    1.20 + ********************************************************************/
    1.21 +
    1.22 +/* this is exposed up here because we need it for static modes.
    1.23 +   Lookups for each backend aren't exposed because there's no reason
    1.24 +   to do so */
    1.25 +
    1.26 +#ifndef _vorbis_backend_h_
    1.27 +#define _vorbis_backend_h_
    1.28 +
    1.29 +#include "codec_internal.h"
    1.30 +
    1.31 +/* this would all be simpler/shorter with templates, but.... */
    1.32 +/* Floor backend generic *****************************************/
    1.33 +typedef struct{
    1.34 +  void                   (*pack)  (vorbis_info_floor *,oggpack_buffer *);
    1.35 +  vorbis_info_floor     *(*unpack)(vorbis_info *,oggpack_buffer *);
    1.36 +  vorbis_look_floor     *(*look)  (vorbis_dsp_state *,vorbis_info_floor *);
    1.37 +  void (*free_info) (vorbis_info_floor *);
    1.38 +  void (*free_look) (vorbis_look_floor *);
    1.39 +  void *(*inverse1)  (struct vorbis_block *,vorbis_look_floor *);
    1.40 +  int   (*inverse2)  (struct vorbis_block *,vorbis_look_floor *,
    1.41 +                     void *buffer,float *);
    1.42 +} vorbis_func_floor;
    1.43 +
    1.44 +typedef struct{
    1.45 +  int   order;
    1.46 +  long  rate;
    1.47 +  long  barkmap;
    1.48 +
    1.49 +  int   ampbits;
    1.50 +  int   ampdB;
    1.51 +
    1.52 +  int   numbooks; /* <= 16 */
    1.53 +  int   books[16];
    1.54 +
    1.55 +  float lessthan;     /* encode-only config setting hacks for libvorbis */
    1.56 +  float greaterthan;  /* encode-only config setting hacks for libvorbis */
    1.57 +
    1.58 +} vorbis_info_floor0;
    1.59 +
    1.60 +
    1.61 +#define VIF_POSIT 63
    1.62 +#define VIF_CLASS 16
    1.63 +#define VIF_PARTS 31
    1.64 +typedef struct{
    1.65 +  int   partitions;                /* 0 to 31 */
    1.66 +  int   partitionclass[VIF_PARTS]; /* 0 to 15 */
    1.67 +
    1.68 +  int   class_dim[VIF_CLASS];        /* 1 to 8 */
    1.69 +  int   class_subs[VIF_CLASS];       /* 0,1,2,3 (bits: 1<<n poss) */
    1.70 +  int   class_book[VIF_CLASS];       /* subs ^ dim entries */
    1.71 +  int   class_subbook[VIF_CLASS][8]; /* [VIF_CLASS][subs] */
    1.72 +
    1.73 +
    1.74 +  int   mult;                      /* 1 2 3 or 4 */
    1.75 +  int   postlist[VIF_POSIT+2];    /* first two implicit */
    1.76 +
    1.77 +
    1.78 +  /* encode side analysis parameters */
    1.79 +  float maxover;
    1.80 +  float maxunder;
    1.81 +  float maxerr;
    1.82 +
    1.83 +  float twofitweight;
    1.84 +  float twofitatten;
    1.85 +
    1.86 +  int   n;
    1.87 +
    1.88 +} vorbis_info_floor1;
    1.89 +
    1.90 +/* Residue backend generic *****************************************/
    1.91 +typedef struct{
    1.92 +  void                 (*pack)  (vorbis_info_residue *,oggpack_buffer *);
    1.93 +  vorbis_info_residue *(*unpack)(vorbis_info *,oggpack_buffer *);
    1.94 +  vorbis_look_residue *(*look)  (vorbis_dsp_state *,
    1.95 +                                 vorbis_info_residue *);
    1.96 +  void (*free_info)    (vorbis_info_residue *);
    1.97 +  void (*free_look)    (vorbis_look_residue *);
    1.98 +  long **(*class)      (struct vorbis_block *,vorbis_look_residue *,
    1.99 +                        int **,int *,int);
   1.100 +  int  (*forward)      (oggpack_buffer *,struct vorbis_block *,
   1.101 +                        vorbis_look_residue *,
   1.102 +                        int **,int *,int,long **,int);
   1.103 +  int  (*inverse)      (struct vorbis_block *,vorbis_look_residue *,
   1.104 +                        float **,int *,int);
   1.105 +} vorbis_func_residue;
   1.106 +
   1.107 +typedef struct vorbis_info_residue0{
   1.108 +/* block-partitioned VQ coded straight residue */
   1.109 +  long  begin;
   1.110 +  long  end;
   1.111 +
   1.112 +  /* first stage (lossless partitioning) */
   1.113 +  int    grouping;         /* group n vectors per partition */
   1.114 +  int    partitions;       /* possible codebooks for a partition */
   1.115 +  int    partvals;         /* partitions ^ groupbook dim */
   1.116 +  int    groupbook;        /* huffbook for partitioning */
   1.117 +  int    secondstages[64]; /* expanded out to pointers in lookup */
   1.118 +  int    booklist[512];    /* list of second stage books */
   1.119 +
   1.120 +  const int classmetric1[64];
   1.121 +  const int classmetric2[64];
   1.122 +} vorbis_info_residue0;
   1.123 +
   1.124 +/* Mapping backend generic *****************************************/
   1.125 +typedef struct{
   1.126 +  void                 (*pack)  (vorbis_info *,vorbis_info_mapping *,
   1.127 +                                 oggpack_buffer *);
   1.128 +  vorbis_info_mapping *(*unpack)(vorbis_info *,oggpack_buffer *);
   1.129 +  void (*free_info)    (vorbis_info_mapping *);
   1.130 +  int  (*forward)      (struct vorbis_block *vb);
   1.131 +  int  (*inverse)      (struct vorbis_block *vb,vorbis_info_mapping *);
   1.132 +} vorbis_func_mapping;
   1.133 +
   1.134 +typedef struct vorbis_info_mapping0{
   1.135 +  int   submaps;  /* <= 16 */
   1.136 +  int   chmuxlist[256];   /* up to 256 channels in a Vorbis stream */
   1.137 +
   1.138 +  int   floorsubmap[16];   /* [mux] submap to floors */
   1.139 +  int   residuesubmap[16]; /* [mux] submap to residue */
   1.140 +
   1.141 +  int   coupling_steps;
   1.142 +  int   coupling_mag[256];
   1.143 +  int   coupling_ang[256];
   1.144 +
   1.145 +} vorbis_info_mapping0;
   1.146 +
   1.147 +#endif