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   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 1994-2009             *
   9  * by the Xiph.Org Foundation http://www.xiph.org/                  *
  10  *                                                                  *
  11  ********************************************************************
  12
  13  function: libvorbis codec headers
  14  last mod: $Id: codec_internal.h 16227 2009-07-08 06:58:46Z xiphmont $
  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   oggpack_buffer *packetblob[PACKETBLOBS]; /* initialized, must be freed;
  37                                               blob [PACKETBLOBS/2] points to
  38                                               the oggpack_buffer in the
  39                                               main vorbis_block */
  40 } vorbis_block_internal;
  41
  42 typedef void vorbis_look_floor;
  43 typedef void vorbis_look_residue;
  44 typedef void vorbis_look_transform;
  45
  46 /* mode ************************************************************/
  47 typedef struct {
  48   int blockflag;
  49   int windowtype;
  50   int transformtype;
  51   int mapping;
  52 } vorbis_info_mode;
  53
  54 typedef void vorbis_info_floor;
  55 typedef void vorbis_info_residue;
  56 typedef void vorbis_info_mapping;
  57
  58 #include "psy.h"
  59 #include "bitrate.h"
  60
  61 typedef struct private_state {
  62   /* local lookup storage */
  63   envelope_lookup        *ve; /* envelope lookup */
  64   int                     window[2];
  65   vorbis_look_transform **transform[2];    /* block, type */
  66   drft_lookup             fft_look[2];
  67
  68   int                     modebits;
  69   vorbis_look_floor     **flr;
  70   vorbis_look_residue   **residue;
  71   vorbis_look_psy        *psy;
  72   vorbis_look_psy_global *psy_g_look;
  73
  74   /* local storage, only used on the encoding side.  This way the
  75      application does not need to worry about freeing some packets'
  76      memory and not others'; packet storage is always tracked.
  77      Cleared next call to a _dsp_ function */
  78   unsigned char *header;
  79   unsigned char *header1;
  80   unsigned char *header2;
  81
  82   bitrate_manager_state bms;
  83
  84   ogg_int64_t sample_count;
  85 } private_state;
  86
  87 /* codec_setup_info contains all the setup information specific to the
  88    specific compression/decompression mode in progress (eg,
  89    psychoacoustic settings, channel setup, options, codebook
  90    etc).
  91 *********************************************************************/
  92
  93 #include "highlevel.h"
  94 typedef struct codec_setup_info {
  95
  96   /* Vorbis supports only short and long blocks, but allows the
  97      encoder to choose the sizes */
  98
  99   long blocksizes[2];
 100
 101   /* modes are the primary means of supporting on-the-fly different
 102      blocksizes, different channel mappings (LR or M/A),
 103      different residue backends, etc.  Each mode consists of a
 104      blocksize flag and a mapping (along with the mapping setup */
 105
 106   int        modes;
 107   int        maps;
 108   int        floors;
 109   int        residues;
 110   int        books;
 111   int        psys;     /* encode only */
 112
 113   vorbis_info_mode       *mode_param[64];
 114   int                     map_type[64];
 115   vorbis_info_mapping    *map_param[64];
 116   int                     floor_type[64];
 117   vorbis_info_floor      *floor_param[64];
 118   int                     residue_type[64];
 119   vorbis_info_residue    *residue_param[64];
 120   static_codebook        *book_param[256];
 121   codebook               *fullbooks;
 122
 123   vorbis_info_psy        *psy_param[4]; /* encode only */
 124   vorbis_info_psy_global psy_g_param;
 125
 126   bitrate_manager_info   bi;
 127   highlevel_encode_setup hi; /* used only by vorbisenc.c.  It's a
 128                                 highly redundant structure, but
 129                                 improves clarity of program flow. */
 130   int         halfrate_flag; /* painless downsample for decode */
 131 } codec_setup_info;
 132
 133 extern vorbis_look_psy_global *_vp_global_look(vorbis_info *vi);
 134 extern void _vp_global_free(vorbis_look_psy_global *look);
 135
 136
 137
 138 typedef struct {
 139   int sorted_index[VIF_POSIT+2];
 140   int forward_index[VIF_POSIT+2];
 141   int reverse_index[VIF_POSIT+2];
 142
 143   int hineighbor[VIF_POSIT];
 144   int loneighbor[VIF_POSIT];
 145   int posts;
 146
 147   int n;
 148   int quant_q;
 149   vorbis_info_floor1 *vi;
 150
 151   long phrasebits;
 152   long postbits;
 153   long frames;
 154 } vorbis_look_floor1;
 155
 156
 157
 158 extern int *floor1_fit(vorbis_block *vb,vorbis_look_floor1 *look,
 159                           const float *logmdct,   /* in */
 160                           const float *logmask);
 161 extern int *floor1_interpolate_fit(vorbis_block *vb,vorbis_look_floor1 *look,
 162                           int *A,int *B,
 163                           int del);
 164 extern int floor1_encode(oggpack_buffer *opb,vorbis_block *vb,
 165                   vorbis_look_floor1 *look,
 166                   int *post,int *ilogmask);
 167 #endif