d9a291f641
Took the opportunity to undo the Godot changed made to the opus source. The opus module should eventually be built in its own environment to avoid polluting others with too many include dirs and defines. TODO: Fix the platform/ stuff for opus.
145 lines
5.1 KiB
C++
145 lines
5.1 KiB
C++
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
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* by the Xiph.Org Foundation http://www.xiph.org/ *
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* *
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********************************************************************
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function: libvorbis backend and mapping structures; needed for
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static mode headers
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last mod: $Id: backends.h 16962 2010-03-11 07:30:34Z xiphmont $
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********************************************************************/
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/* this is exposed up here because we need it for static modes.
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Lookups for each backend aren't exposed because there's no reason
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to do so */
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#ifndef _vorbis_backend_h_
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#define _vorbis_backend_h_
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#include "codec_internal.h"
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/* this would all be simpler/shorter with templates, but.... */
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/* Floor backend generic *****************************************/
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typedef struct{
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void (*pack) (vorbis_info_floor *,oggpack_buffer *);
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vorbis_info_floor *(*unpack)(vorbis_info *,oggpack_buffer *);
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vorbis_look_floor *(*look) (vorbis_dsp_state *,vorbis_info_floor *);
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void (*free_info) (vorbis_info_floor *);
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void (*free_look) (vorbis_look_floor *);
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void *(*inverse1) (struct vorbis_block *,vorbis_look_floor *);
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int (*inverse2) (struct vorbis_block *,vorbis_look_floor *,
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void *buffer,float *);
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} vorbis_func_floor;
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typedef struct{
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int order;
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long rate;
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long barkmap;
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int ampbits;
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int ampdB;
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int numbooks; /* <= 16 */
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int books[16];
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float lessthan; /* encode-only config setting hacks for libvorbis */
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float greaterthan; /* encode-only config setting hacks for libvorbis */
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} vorbis_info_floor0;
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#define VIF_POSIT 63
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#define VIF_CLASS 16
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#define VIF_PARTS 31
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typedef struct{
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int partitions; /* 0 to 31 */
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int partitionclass[VIF_PARTS]; /* 0 to 15 */
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int class_dim[VIF_CLASS]; /* 1 to 8 */
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int class_subs[VIF_CLASS]; /* 0,1,2,3 (bits: 1<<n poss) */
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int class_book[VIF_CLASS]; /* subs ^ dim entries */
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int class_subbook[VIF_CLASS][8]; /* [VIF_CLASS][subs] */
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int mult; /* 1 2 3 or 4 */
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int postlist[VIF_POSIT+2]; /* first two implicit */
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/* encode side analysis parameters */
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float maxover;
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float maxunder;
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float maxerr;
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float twofitweight;
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float twofitatten;
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int n;
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} vorbis_info_floor1;
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/* Residue backend generic *****************************************/
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typedef struct{
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void (*pack) (vorbis_info_residue *,oggpack_buffer *);
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vorbis_info_residue *(*unpack)(vorbis_info *,oggpack_buffer *);
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vorbis_look_residue *(*look) (vorbis_dsp_state *,
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vorbis_info_residue *);
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void (*free_info) (vorbis_info_residue *);
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void (*free_look) (vorbis_look_residue *);
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long **(*class) (struct vorbis_block *,vorbis_look_residue *,
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int **,int *,int);
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int (*forward) (oggpack_buffer *,struct vorbis_block *,
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vorbis_look_residue *,
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int **,int *,int,long **,int);
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int (*inverse) (struct vorbis_block *,vorbis_look_residue *,
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float **,int *,int);
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} vorbis_func_residue;
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typedef struct vorbis_info_residue0{
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/* block-partitioned VQ coded straight residue */
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long begin;
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long end;
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/* first stage (lossless partitioning) */
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int grouping; /* group n vectors per partition */
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int partitions; /* possible codebooks for a partition */
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int partvals; /* partitions ^ groupbook dim */
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int groupbook; /* huffbook for partitioning */
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int secondstages[64]; /* expanded out to pointers in lookup */
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int booklist[512]; /* list of second stage books */
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const int classmetric1[64];
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const int classmetric2[64];
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} vorbis_info_residue0;
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/* Mapping backend generic *****************************************/
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typedef struct{
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void (*pack) (vorbis_info *,vorbis_info_mapping *,
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oggpack_buffer *);
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vorbis_info_mapping *(*unpack)(vorbis_info *,oggpack_buffer *);
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void (*free_info) (vorbis_info_mapping *);
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int (*forward) (struct vorbis_block *vb);
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int (*inverse) (struct vorbis_block *vb,vorbis_info_mapping *);
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} vorbis_func_mapping;
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typedef struct vorbis_info_mapping0{
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int submaps; /* <= 16 */
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int chmuxlist[256]; /* up to 256 channels in a Vorbis stream */
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int floorsubmap[16]; /* [mux] submap to floors */
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int residuesubmap[16]; /* [mux] submap to residue */
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int coupling_steps;
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int coupling_mag[256];
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int coupling_ang[256];
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} vorbis_info_mapping0;
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#endif
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