tremor/codec_internal.h

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