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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' 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 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: libvorbis codec headers
********************************************************************/
#ifndef _V_CODECI_H_
#define _V_CODECI_H_
#define CHUNKSIZE 1024
#include "codebook.h"
#include "ivorbiscodec.h"
#define VI_TRANSFORMB 1
#define VI_WINDOWB 1
#define VI_TIMEB 1
#define VI_FLOORB 2
#define VI_RESB 3
#define VI_MAPB 1
typedef void vorbis_info_floor;
/* vorbis_dsp_state buffers the current vorbis audio
analysis/synthesis state. The DSP state belongs to a specific
logical bitstream ****************************************************/
struct vorbis_dsp_state{
vorbis_info *vi;
oggpack_buffer opb;
ogg_int32_t **work;
ogg_int32_t **mdctright;
int out_begin;
int out_end;
long lW;
long W;
ogg_int64_t granulepos;
ogg_int64_t sequence;
ogg_int64_t sample_count;
};
/* Floor backend generic *****************************************/
extern vorbis_info_floor *floor0_info_unpack(vorbis_info *,oggpack_buffer *);
extern void floor0_free_info(vorbis_info_floor *);
extern int floor0_memosize(vorbis_info_floor *);
extern ogg_int32_t *floor0_inverse1(struct vorbis_dsp_state *,
vorbis_info_floor *,ogg_int32_t *);
extern int floor0_inverse2 (struct vorbis_dsp_state *,vorbis_info_floor *,
ogg_int32_t *buffer,ogg_int32_t *);
extern vorbis_info_floor *floor1_info_unpack(vorbis_info *,oggpack_buffer *);
extern void floor1_free_info(vorbis_info_floor *);
extern int floor1_memosize(vorbis_info_floor *);
extern ogg_int32_t *floor1_inverse1(struct vorbis_dsp_state *,
vorbis_info_floor *,ogg_int32_t *);
extern int floor1_inverse2 (struct vorbis_dsp_state *,vorbis_info_floor *,
ogg_int32_t *buffer,ogg_int32_t *);
typedef struct{
int order;
long rate;
long barkmap;
int ampbits;
int ampdB;
int numbooks; /* <= 16 */
char books[16];
} vorbis_info_floor0;
typedef struct{
char class_dim; /* 1 to 8 */
char class_subs; /* 0,1,2,3 (bits: 1<<n poss) */
unsigned char class_book; /* subs ^ dim entries */
unsigned char class_subbook[8]; /* [VIF_CLASS][subs] */
} floor1class;
typedef struct{
floor1class *class; /* [VIF_CLASS] */
char *partitionclass; /* [VIF_PARTS]; 0 to 15 */
ogg_uint16_t *postlist; /* [VIF_POSIT+2]; first two implicit */
char *forward_index; /* [VIF_POSIT+2]; */
char *hineighbor; /* [VIF_POSIT]; */
char *loneighbor; /* [VIF_POSIT]; */
int partitions; /* 0 to 31 */
int posts;
int mult; /* 1 2 3 or 4 */
} vorbis_info_floor1;
/* Residue backend generic *****************************************/
typedef struct vorbis_info_residue{
int type;
unsigned char *stagemasks;
unsigned char *stagebooks;
/* block-partitioned VQ coded straight residue */
long begin;
long end;
/* first stage (lossless partitioning) */
int grouping; /* group n vectors per partition */
char partitions; /* possible codebooks for a partition */
unsigned char groupbook; /* huffbook for partitioning */
char stages;
} vorbis_info_residue;
extern void res_clear_info(vorbis_info_residue *info);
extern int res_unpack(vorbis_info_residue *info,
vorbis_info *vi,oggpack_buffer *opb);
extern int res_inverse(vorbis_dsp_state *,vorbis_info_residue *info,
ogg_int32_t **in,int *nonzero,int ch);
/* mode ************************************************************/
typedef struct {
unsigned char blockflag;
unsigned char mapping;
} vorbis_info_mode;
/* Mapping backend generic *****************************************/
typedef struct coupling_step{
unsigned char mag;
unsigned char ang;
} coupling_step;
typedef struct submap{
char floor;
char residue;
} submap;
typedef struct vorbis_info_mapping{
int submaps;
unsigned char *chmuxlist;
submap *submaplist;
int coupling_steps;
coupling_step *coupling;
} vorbis_info_mapping;
extern int mapping_info_unpack(vorbis_info_mapping *,vorbis_info *,
oggpack_buffer *);
extern void mapping_clear_info(vorbis_info_mapping *);
extern int mapping_inverse(struct vorbis_dsp_state *,vorbis_info_mapping *);
/* codec_setup_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 M/A),
different residue backends, etc. Each mode consists of a
blocksize flag and a mapping (along with the mapping setup */
int modes;
int maps;
int floors;
int residues;
int books;
vorbis_info_mode *mode_param;
vorbis_info_mapping *map_param;
char *floor_type;
vorbis_info_floor **floor_param;
vorbis_info_residue *residue_param;
codebook *book_param;
} codec_setup_info;
extern int vorbis_dsp_init(vorbis_dsp_state *v, vorbis_info *vi);
extern void vorbis_dsp_clear(vorbis_dsp_state *v);
extern vorbis_dsp_state *vorbis_dsp_create(vorbis_info *vi);
extern void vorbis_dsp_destroy(vorbis_dsp_state *v);
extern int vorbis_dsp_headerin(vorbis_info *vi,vorbis_comment *vc,
ogg_packet *op);
extern int vorbis_dsp_restart(vorbis_dsp_state *v);
extern int vorbis_dsp_synthesis(vorbis_dsp_state *vd,
ogg_packet *op,int decodep);
extern int vorbis_dsp_pcmout(vorbis_dsp_state *v,
ogg_int16_t *pcm,int samples);
extern int vorbis_dsp_read(vorbis_dsp_state *v,int samples);
extern long vorbis_packet_blocksize(vorbis_info *vi,ogg_packet *op);
#endif
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