tremor/codec_internal.h

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE.   *
   4  *                                                                  *
   5  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
   6  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
   7  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
   8  *                                                                  *
   9  * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002    *
  10  * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
  11  *                                                                  *
  12  ********************************************************************
  13
  14  function: libvorbis codec headers
  15
  16  ********************************************************************/
  17
  18 #ifndef _V_CODECI_H_
  19 #define _V_CODECI_H_
  20
  21 #include "codebook.h"
  22
  23 typedef void vorbis_look_mapping;
  24 typedef void vorbis_look_floor;
  25 typedef void vorbis_look_residue;
  26 typedef void vorbis_look_transform;
  27
  28 /* mode ************************************************************/
  29 typedef struct {
  30   int blockflag;
  31   int windowtype;
  32   int transformtype;
  33   int mapping;
  34 } vorbis_info_mode;
  35
  36 typedef void vorbis_info_floor;
  37 typedef void vorbis_info_residue;
  38 typedef void vorbis_info_mapping;
  39
  40 typedef struct backend_lookup_state {
  41   /* local lookup storage */
  42   ogg_int32_t               *window[2];
  43
  44   /* backend lookups are tied to the mode, not the backend or naked mapping */
  45   int                     modebits;
  46   vorbis_look_mapping   **mode;
  47
  48 } backend_lookup_state;
  49
  50 /* codec_setup_info contains all the setup information specific to the
  51    specific compression/decompression mode in progress (eg,
  52    psychoacoustic settings, channel setup, options, codebook
  53    etc).
  54 *********************************************************************/
  55
  56 typedef struct codec_setup_info {
  57
  58   /* Vorbis supports only short and long blocks, but allows the
  59      encoder to choose the sizes */
  60
  61   long blocksizes[2];
  62
  63   /* modes are the primary means of supporting on-the-fly different
  64      blocksizes, different channel mappings (LR or M/A),
  65      different residue backends, etc.  Each mode consists of a
  66      blocksize flag and a mapping (along with the mapping setup */
  67
  68   int        modes;
  69   int        maps;
  70   int        times;
  71   int        floors;
  72   int        residues;
  73   int        books;
  74
  75   vorbis_info_mode       *mode_param[64];
  76   int                     map_type[64];
  77   vorbis_info_mapping    *map_param[64];
  78   int                     time_type[64];
  79   int                     floor_type[64];
  80   vorbis_info_floor      *floor_param[64];
  81   int                     residue_type[64];
  82   vorbis_info_residue    *residue_param[64];
  83   static_codebook        *book_param[256];
  84   codebook               *fullbooks;
  85
  86   int    passlimit[32];     /* iteration limit per couple/quant pass */
  87   int    coupling_passes;
  88 } codec_setup_info;
  89
  90 #endif