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