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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
* THE GNU LESSER/LIBRARY PUBLIC LICENSE, WHICH IS INCLUDED WITH *
* THIS SOURCE. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
* by Monty <monty@xiph.org> and the XIPHOPHORUS Company *
* http://www.xiph.org/ *
* *
********************************************************************
function: libvorbis codec headers
last mod: $Id: codec_internal.h,v 1.4 2001/01/22 01:38:24 xiphmont Exp $
********************************************************************/
#ifndef _V_CODECI_H_
#define _V_CODECI_H_
#include "envelope.h"
#include "codebook.h"
#include "psy.h"
#include "bitbuffer.h"
typedef struct vorbis_block_internal{
float **pcmdelay; /* this is a pointer into local storage */
float ampmax;
} vorbis_block_internal;
typedef void vorbis_look_time;
typedef void vorbis_look_mapping;
typedef void vorbis_look_floor;
typedef void vorbis_look_residue;
typedef void vorbis_look_transform;
typedef struct backend_lookup_state {
/* local lookup storage */
envelope_lookup *ve; /* envelope lookup */
float **window[2][2][2]; /* block, leadin, leadout, type */
vorbis_look_transform **transform[2]; /* block, type */
codebook *fullbooks;
/* backend lookups are tied to the mode, not the backend or naked mapping */
int modebits;
vorbis_look_mapping **mode;
/* local storage, only used on the encoding side. This way the
application does not need to worry about freeing some packets'
memory and not others'; packet storage is always tracked.
Cleared next call to a _dsp_ function */
unsigned char *header;
unsigned char *header1;
unsigned char *header2;
float ampmax;
} backend_lookup_state;
/* mode ************************************************************/
typedef struct {
int blockflag;
int windowtype;
int transformtype;
int mapping;
} vorbis_info_mode;
typedef void vorbis_info_time;
typedef void vorbis_info_floor;
typedef void vorbis_info_residue;
typedef void vorbis_info_mapping;
/* vorbis_info contains all the setup information specific to the
specific compression/decompression mode in progress (eg,
psychoacoustic settings, channel setup, options, codebook
etc).
*********************************************************************/
typedef struct codec_setup_info {
/* Vorbis supports only short and long blocks, but allows the
encoder to choose the sizes */
long blocksizes[2];
/* modes are the primary means of supporting on-the-fly different
blocksizes, different channel mappings (LR or mid-side),
different residue backends, etc. Each mode consists of a
blocksize flag and a mapping (along with the mapping setup */
int modes;
int maps;
int times;
int floors;
int residues;
int books;
int psys; /* encode only */
vorbis_info_mode *mode_param[64];
int map_type[64];
vorbis_info_mapping *map_param[64];
int time_type[64];
vorbis_info_time *time_param[64];
int floor_type[64];
vorbis_info_floor *floor_param[64];
int residue_type[64];
vorbis_info_residue *residue_param[64];
static_codebook *book_param[256];
vorbis_info_psy *psy_param[64]; /* encode only */
/* for block long/sort tuning; encode only */
int envelopesa;
float preecho_thresh;
float postecho_thresh;
float preecho_minenergy;
float ampmax_att_per_sec;
/* delay caching... how many samples to keep around prior to our
current block to aid in analysis? */
int delaycache;
} codec_setup_info;
#endif
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