ref: 8188b4f4f0e07b6669e6ae3c6c1099af917eaab4
dir: /sys/src/cmd/audio/libvorbis/codec_internal.h/
/********************************************************************
* *
* 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 https://xiph.org/ *
* *
********************************************************************
function: libvorbis codec headers
********************************************************************/
#ifndef _V_CODECI_H_
#define _V_CODECI_H_
#include "envelope.h"
#include "codebook.h"
#define BLOCKTYPE_IMPULSE 0
#define BLOCKTYPE_PADDING 1
#define BLOCKTYPE_TRANSITION 0
#define BLOCKTYPE_LONG 1
#define PACKETBLOBS 15
typedef struct vorbis_block_internal{
float **pcmdelay; /* this is a pointer into local storage */
float ampmax;
int blocktype;
oggpack_buffer *packetblob[PACKETBLOBS]; /* initialized, must be freed;
blob [PACKETBLOBS/2] points to
the oggpack_buffer in the
main vorbis_block */
} vorbis_block_internal;
typedef void vorbis_look_floor;
typedef void vorbis_look_residue;
typedef void vorbis_look_transform;
/* mode ************************************************************/
typedef struct {
int blockflag;
int windowtype;
int transformtype;
int mapping;
} vorbis_info_mode;
typedef void vorbis_info_floor;
typedef void vorbis_info_residue;
typedef void vorbis_info_mapping;
#include "psy.h"
#include "bitrate.h"
typedef struct private_state {
/* local lookup storage */
envelope_lookup *ve; /* envelope lookup */
int window[2];
vorbis_look_transform **transform[2]; /* block, type */
drft_lookup fft_look[2];
int modebits;
vorbis_look_floor **flr;
vorbis_look_residue **residue;
vorbis_look_psy *psy;
vorbis_look_psy_global *psy_g_look;
/* 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;
bitrate_manager_state bms;
ogg_int64_t sample_count;
} private_state;
/* 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).
*********************************************************************/
#include "highlevel.h"
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;
int psys; /* encode only */
vorbis_info_mode *mode_param[64];
int map_type[64];
vorbis_info_mapping *map_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];
codebook *fullbooks;
vorbis_info_psy *psy_param[4]; /* encode only */
vorbis_info_psy_global psy_g_param;
bitrate_manager_info bi;
highlevel_encode_setup hi; /* used only by vorbisenc.c. It's a
highly redundant structure, but
improves clarity of program flow. */
int halfrate_flag; /* painless downsample for decode */
} codec_setup_info;
extern vorbis_look_psy_global *_vp_global_look(vorbis_info *vi);
extern void _vp_global_free(vorbis_look_psy_global *look);
typedef struct {
int sorted_index[VIF_POSIT+2];
int forward_index[VIF_POSIT+2];
int reverse_index[VIF_POSIT+2];
int hineighbor[VIF_POSIT];
int loneighbor[VIF_POSIT];
int posts;
int n;
int quant_q;
vorbis_info_floor1 *vi;
long phrasebits;
long postbits;
long frames;
} vorbis_look_floor1;
extern int *floor1_fit(vorbis_block *vb,vorbis_look_floor1 *look,
const float *logmdct, /* in */
const float *logmask);
extern int *floor1_interpolate_fit(vorbis_block *vb,vorbis_look_floor1 *look,
int *A,int *B,
int del);
extern int floor1_encode(oggpack_buffer *opb,vorbis_block *vb,
vorbis_look_floor1 *look,
int *post,int *ilogmask);
#endif