1 /********************************************************************
3 * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
5 * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
6 * PLEASE READ THESE TERMS DISTRIBUTING. *
8 * THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
9 * by Monty <monty@xiph.org> and The XIPHOPHORUS Company *
10 * http://www.xiph.org/ *
12 ********************************************************************
14 function: libvorbis backend and mapping structures; needed for
16 last mod: $Id: backends.h,v 1.2 2000/01/22 13:28:10 xiphmont Exp $
18 ********************************************************************/
20 /* this is exposed up here because we need it for static modes.
21 Lookups for each backend aren't exposed because there's no reason
24 #ifndef _vorbis_time_backend_h_
25 #define _vorbis_time_backend_h_
27 /* this would all be simpler/shorter with templates, but.... */
28 /* Transform backend generic *************************************/
30 /* only mdct right now. Flesh it out more if we ever transcend mdct
31 in the transform domain */
33 /* Time backend generic ******************************************/
35 void (*pack) (vorbis_info_time *,oggpack_buffer *);
36 vorbis_info_time *(*unpack)(vorbis_info *,oggpack_buffer *);
37 vorbis_look_time *(*look) (vorbis_info *,vorbis_info_mode *,
39 void (*free_info) (vorbis_info_time *);
40 void (*free_look) (vorbis_look_time *);
41 int (*forward) (struct vorbis_block *,vorbis_look_time *,
43 int (*inverse) (struct vorbis_block *,vorbis_look_time *,
51 /* Floor backend generic *****************************************/
53 void (*pack) (vorbis_info_floor *,oggpack_buffer *);
54 vorbis_info_floor *(*unpack)(vorbis_info *,oggpack_buffer *);
55 vorbis_look_floor *(*look) (vorbis_info *,vorbis_info_mode *,
57 void (*free_info) (vorbis_info_floor *);
58 void (*free_look) (vorbis_look_floor *);
59 int (*forward) (struct vorbis_block *,vorbis_look_floor *,
61 int (*inverse) (struct vorbis_block *,vorbis_look_floor *,
73 /* Residue backend generic *****************************************/
75 void (*pack) (vorbis_info_residue *,oggpack_buffer *);
76 vorbis_info_residue *(*unpack)(vorbis_info *,oggpack_buffer *);
77 vorbis_look_residue *(*look) (vorbis_info *,vorbis_info_mode *,
78 vorbis_info_residue *);
79 void (*free_info) (vorbis_info_residue *);
80 void (*free_look) (vorbis_look_residue *);
81 int (*forward) (struct vorbis_block *,vorbis_look_residue *,
83 int (*inverse) (struct vorbis_block *,vorbis_look_residue *,
85 } vorbis_func_residue;
87 typedef struct vorbis_info_residue0{
88 /* block-partitioned VQ coded straight residue */
92 /* way unfinished, just so you know while poking around CVS ;-) */
95 } vorbis_info_residue0;
97 /* Mapping backend generic *****************************************/
99 void (*pack) (vorbis_info_mapping *,oggpack_buffer *);
100 vorbis_info_mapping *(*unpack)(vorbis_info *,oggpack_buffer *);
101 vorbis_look_mapping *(*look) (vorbis_info *,vorbis_info_mode *,
102 vorbis_info_mapping *);
103 void (*free_info) (vorbis_info_mapping *);
104 void (*free_look) (vorbis_look_mapping *);
105 int (*forward) (struct vorbis_block *vb,vorbis_look_mapping *);
106 int (*inverse) (struct vorbis_block *vb,vorbis_look_mapping *);
107 } vorbis_func_mapping;
109 typedef struct vorbis_info_mapping0{
113 int *timesubmap; /* [mux] */
114 int *floorsubmap; /* [mux] submap to floors */
115 int *residuesubmap; /* [mux] submap to residue */
116 int *psysubmap; /* [mux]; encode only */
117 } vorbis_info_mapping0;