| 1 | /********************************************************************
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| 2 | * *
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| 3 | * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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| 4 | * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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| 5 | * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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| 6 | * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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| 7 | * *
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| 8 | * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
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| 9 | * by the Xiph.Org Foundation https://xiph.org/ *
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| 10 | * *
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| 11 | ********************************************************************
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| 12 |
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| 13 | function: libvorbis backend and mapping structures; needed for
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| 14 | static mode headers
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| 15 |
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| 16 | ********************************************************************/
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| 17 |
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| 18 | /* this is exposed up here because we need it for static modes.
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| 19 | Lookups for each backend aren't exposed because there's no reason
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| 20 | to do so */
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| 21 |
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| 22 | #ifndef _vorbis_backend_h_
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| 23 | #define _vorbis_backend_h_
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| 24 |
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| 25 | #include "codec_internal.h"
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| 26 |
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| 27 | /* this would all be simpler/shorter with templates, but.... */
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| 28 | /* Floor backend generic *****************************************/
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| 29 | typedef struct{
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| 30 | void (*pack) (vorbis_info_floor *,oggpack_buffer *);
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| 31 | vorbis_info_floor *(*unpack)(vorbis_info *,oggpack_buffer *);
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| 32 | vorbis_look_floor *(*look) (vorbis_dsp_state *,vorbis_info_floor *);
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| 33 | void (*free_info) (vorbis_info_floor *);
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| 34 | void (*free_look) (vorbis_look_floor *);
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| 35 | void *(*inverse1) (struct vorbis_block *,vorbis_look_floor *);
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| 36 | int (*inverse2) (struct vorbis_block *,vorbis_look_floor *,
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| 37 | void *buffer,float *);
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| 38 | } vorbis_func_floor;
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| 39 |
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| 40 | typedef struct{
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| 41 | int order;
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| 42 | long rate;
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| 43 | long barkmap;
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| 44 |
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| 45 | int ampbits;
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| 46 | int ampdB;
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| 47 |
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| 48 | int numbooks; /* <= 16 */
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| 49 | int books[16];
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| 50 |
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| 51 | float lessthan; /* encode-only config setting hacks for libvorbis */
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| 52 | float greaterthan; /* encode-only config setting hacks for libvorbis */
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| 53 |
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| 54 | } vorbis_info_floor0;
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| 55 |
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| 56 |
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| 57 | #define VIF_POSIT 63
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| 58 | #define VIF_CLASS 16
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| 59 | #define VIF_PARTS 31
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| 60 | typedef struct{
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| 61 | int partitions; /* 0 to 31 */
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| 62 | int partitionclass[VIF_PARTS]; /* 0 to 15 */
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| 63 |
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| 64 | int class_dim[VIF_CLASS]; /* 1 to 8 */
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| 65 | int class_subs[VIF_CLASS]; /* 0,1,2,3 (bits: 1<<n poss) */
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| 66 | int class_book[VIF_CLASS]; /* subs ^ dim entries */
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| 67 | int class_subbook[VIF_CLASS][8]; /* [VIF_CLASS][subs] */
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| 68 |
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| 69 |
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| 70 | int mult; /* 1 2 3 or 4 */
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| 71 | int postlist[VIF_POSIT+2]; /* first two implicit */
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| 72 |
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| 73 |
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| 74 | /* encode side analysis parameters */
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| 75 | float maxover;
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| 76 | float maxunder;
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| 77 | float maxerr;
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| 78 |
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| 79 | float twofitweight;
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| 80 | float twofitatten;
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| 81 |
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| 82 | int n;
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| 83 |
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| 84 | } vorbis_info_floor1;
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| 85 |
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| 86 | /* Residue backend generic *****************************************/
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| 87 | typedef struct{
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| 88 | void (*pack) (vorbis_info_residue *,oggpack_buffer *);
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| 89 | vorbis_info_residue *(*unpack)(vorbis_info *,oggpack_buffer *);
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| 90 | vorbis_look_residue *(*look) (vorbis_dsp_state *,
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| 91 | vorbis_info_residue *);
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| 92 | void (*free_info) (vorbis_info_residue *);
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| 93 | void (*free_look) (vorbis_look_residue *);
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| 94 | long **(*class) (struct vorbis_block *,vorbis_look_residue *,
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| 95 | int **,int *,int);
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| 96 | int (*forward) (oggpack_buffer *,struct vorbis_block *,
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| 97 | vorbis_look_residue *,
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| 98 | int **,int *,int,long **,int);
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| 99 | int (*inverse) (struct vorbis_block *,vorbis_look_residue *,
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| 100 | float **,int *,int);
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| 101 | } vorbis_func_residue;
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| 102 |
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| 103 | typedef struct vorbis_info_residue0{
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| 104 | /* block-partitioned VQ coded straight residue */
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| 105 | long begin;
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| 106 | long end;
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| 107 |
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| 108 | /* first stage (lossless partitioning) */
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| 109 | int grouping; /* group n vectors per partition */
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| 110 | int partitions; /* possible codebooks for a partition */
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| 111 | int partvals; /* partitions ^ groupbook dim */
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| 112 | int groupbook; /* huffbook for partitioning */
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| 113 | int secondstages[64]; /* expanded out to pointers in lookup */
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| 114 | int booklist[512]; /* list of second stage books */
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| 115 |
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| 116 | const int classmetric1[64];
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| 117 | const int classmetric2[64];
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| 118 | } vorbis_info_residue0;
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| 119 |
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| 120 | /* Mapping backend generic *****************************************/
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| 121 | typedef struct{
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| 122 | void (*pack) (vorbis_info *,vorbis_info_mapping *,
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| 123 | oggpack_buffer *);
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| 124 | vorbis_info_mapping *(*unpack)(vorbis_info *,oggpack_buffer *);
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| 125 | void (*free_info) (vorbis_info_mapping *);
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| 126 | int (*forward) (struct vorbis_block *vb);
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| 127 | int (*inverse) (struct vorbis_block *vb,vorbis_info_mapping *);
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| 128 | } vorbis_func_mapping;
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| 129 |
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| 130 | typedef struct vorbis_info_mapping0{
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| 131 | int submaps; /* <= 16 */
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| 132 | int chmuxlist[256]; /* up to 256 channels in a Vorbis stream */
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| 133 |
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| 134 | int floorsubmap[16]; /* [mux] submap to floors */
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| 135 | int residuesubmap[16]; /* [mux] submap to residue */
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| 136 |
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| 137 | int coupling_steps;
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| 138 | int coupling_mag[256];
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| 139 | int coupling_ang[256];
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| 140 |
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| 141 | } vorbis_info_mapping0;
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| 142 |
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| 143 | #endif
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