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codec_internal.h (4431B)

      1 /********************************************************************
      2  *                                                                  *
      3  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
      4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
      5  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
      6  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
      7  *                                                                  *
      8  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002             *
      9  * by the XIPHOPHORUS Company http://www.xiph.org/                  *
     10  *                                                                  *
     11  ********************************************************************
     12 
     13  function: libvorbis codec headers
     14  last mod: $Id: codec_internal.h 1919 2005-07-24 14:18:04Z baford $
     15 
     16  ********************************************************************/
     17 
     18 #ifndef _V_CODECI_H_
     19 #define _V_CODECI_H_
     20 
     21 #include "envelope.h"
     22 #include "codebook.h"
     23 
     24 #define BLOCKTYPE_IMPULSE    0
     25 #define BLOCKTYPE_PADDING    1
     26 #define BLOCKTYPE_TRANSITION 0 
     27 #define BLOCKTYPE_LONG       1
     28 
     29 #define PACKETBLOBS 15
     30 
     31 typedef struct vorbis_block_internal{
     32   float  **pcmdelay;  /* this is a pointer into local storage */ 
     33   float  ampmax;
     34   int    blocktype;
     35 
     36   ogg_uint32_t   packetblob_markers[PACKETBLOBS];
     37 } vorbis_block_internal;
     38 
     39 typedef void vorbis_look_floor;
     40 typedef void vorbis_look_residue;
     41 typedef void vorbis_look_transform;
     42 
     43 /* mode ************************************************************/
     44 typedef struct {
     45   int blockflag;
     46   int windowtype;
     47   int transformtype;
     48   int mapping;
     49 } vorbis_info_mode;
     50 
     51 typedef void vorbis_info_floor;
     52 typedef void vorbis_info_residue;
     53 typedef void vorbis_info_mapping;
     54 
     55 #include "psy.h"
     56 #include "bitrate.h"
     57 
     58 typedef struct private_state {
     59   /* local lookup storage */
     60   envelope_lookup        *ve; /* envelope lookup */    
     61   int                     window[2];
     62   vorbis_look_transform **transform[2];    /* block, type */
     63   drft_lookup             fft_look[2];
     64 
     65   int                     modebits;
     66   vorbis_look_floor     **flr;
     67   vorbis_look_residue   **residue;
     68   vorbis_look_psy        *psy;
     69   vorbis_look_psy_global *psy_g_look;
     70 
     71   /* local storage, only used on the encoding side.  This way the
     72      application does not need to worry about freeing some packets'
     73      memory and not others'; packet storage is always tracked.
     74      Cleared next call to a _dsp_ function */
     75   unsigned char *header;
     76   unsigned char *header1;
     77   unsigned char *header2;
     78 
     79   bitrate_manager_state bms;
     80 
     81   ogg_int64_t sample_count;
     82 } private_state;
     83 
     84 /* codec_setup_info contains all the setup information specific to the
     85    specific compression/decompression mode in progress (eg,
     86    psychoacoustic settings, channel setup, options, codebook
     87    etc).  
     88 *********************************************************************/
     89 
     90 #include "highlevel.h"
     91 typedef struct codec_setup_info {
     92 
     93   /* Vorbis supports only short and long blocks, but allows the
     94      encoder to choose the sizes */
     95 
     96   long blocksizes[2];
     97 
     98   /* modes are the primary means of supporting on-the-fly different
     99      blocksizes, different channel mappings (LR or M/A),
    100      different residue backends, etc.  Each mode consists of a
    101      blocksize flag and a mapping (along with the mapping setup */
    102 
    103   int        modes;
    104   int        maps;
    105   int        floors;
    106   int        residues;
    107   int        books;
    108   int        psys;     /* encode only */
    109 
    110   vorbis_info_mode       *mode_param[64];
    111   int                     map_type[64];
    112   vorbis_info_mapping    *map_param[64];
    113   int                     floor_type[64];
    114   vorbis_info_floor      *floor_param[64];
    115   int                     residue_type[64];
    116   vorbis_info_residue    *residue_param[64];
    117   static_codebook        *book_param[256];
    118   codebook               *fullbooks;
    119 
    120   vorbis_info_psy        *psy_param[4]; /* encode only */
    121   vorbis_info_psy_global psy_g_param;
    122 
    123   bitrate_manager_info   bi;
    124   highlevel_encode_setup hi; /* used only by vorbisenc.c.  It's a
    125                                 highly redundant structure, but
    126                                 improves clarity of program flow. */
    127   int         halfrate_flag; /* painless downsample for decode */  
    128 } codec_setup_info;
    129 
    130 extern vorbis_look_psy_global *_vp_global_look(vorbis_info *vi);
    131 extern void _vp_global_free(vorbis_look_psy_global *look);
    132 
    133 #endif
    134