codec_internal.h - mozsearch

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/********************************************************************

 *                                                                  *

 * 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