lib/codec_internal.h

   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
  15  ********************************************************************/
  16
  17 #ifndef _V_CODECI_H_
  18 #define _V_CODECI_H_
  19
  20 #include "envelope.h"
  21 #include "codebook.h"
  22
  23 #define BLOCKTYPE_IMPULSE    0
  24 #define BLOCKTYPE_PADDING    1
  25 #define BLOCKTYPE_TRANSITION 0
  26 #define BLOCKTYPE_LONG       1
  27
  28 #define PACKETBLOBS 15
  29
  30 typedef struct vorbis_block_internal{
  31   float  **pcmdelay;  /* this is a pointer into local storage */
  32   float  ampmax;
  33   int    blocktype;
  34
  35   oggpack_buffer *packetblob[PACKETBLOBS]; /* initialized, must be freed;
  36                                               blob [PACKETBLOBS/2] points to
  37                                               the oggpack_buffer in the
  38                                               main vorbis_block */
  39 } vorbis_block_internal;
  40
  41 typedef void vorbis_look_floor;
  42 typedef void vorbis_look_residue;
  43 typedef void vorbis_look_transform;
  44
  45 /* mode ************************************************************/
  46 typedef struct {
  47   int blockflag;
  48   int windowtype;
  49   int transformtype;
  50   int mapping;
  51 } vorbis_info_mode;
  52
  53 typedef void vorbis_info_floor;
  54 typedef void vorbis_info_residue;
  55 typedef void vorbis_info_mapping;
  56
  57 #include "psy.h"
  58 #include "bitrate.h"
  59
  60 typedef struct private_state {
  61   /* local lookup storage */
  62   envelope_lookup        *ve; /* envelope lookup */
  63   int                     window[2];
  64   vorbis_look_transform **transform[2];    /* block, type */
  65   drft_lookup             fft_look[2];
  66
  67   int                     modebits;
  68   vorbis_look_floor     **flr;
  69   vorbis_look_residue   **residue;
  70   vorbis_look_psy        *psy;
  71   vorbis_look_psy_global *psy_g_look;
  72
  73   /* local storage, only used on the encoding side.  This way the
  74      application does not need to worry about freeing some packets'
  75      memory and not others'; packet storage is always tracked.
  76      Cleared next call to a _dsp_ function */
  77   unsigned char *header;
  78   unsigned char *header1;
  79   unsigned char *header2;
  80
  81   bitrate_manager_state bms;
  82
  83   ogg_int64_t sample_count;
  84 } private_state;
  85
  86 /* codec_setup_info contains all the setup information specific to the
  87    specific compression/decompression mode in progress (eg,
  88    psychoacoustic settings, channel setup, options, codebook
  89    etc).
  90 *********************************************************************/
  91
  92 #include "highlevel.h"
  93 typedef struct codec_setup_info {
  94
  95   /* Vorbis supports only short and long blocks, but allows the
  96      encoder to choose the sizes */
  97
  98   long blocksizes[2];
  99
 100   /* modes are the primary means of supporting on-the-fly different
 101      blocksizes, different channel mappings (LR or M/A),
 102      different residue backends, etc.  Each mode consists of a
 103      blocksize flag and a mapping (along with the mapping setup */
 104
 105   int        modes;
 106   int        maps;
 107   int        floors;
 108   int        residues;
 109   int        books;
 110   int        psys;     /* encode only */
 111
 112   vorbis_info_mode       *mode_param[64];
 113   int                     map_type[64];
 114   vorbis_info_mapping    *map_param[64];
 115   int                     floor_type[64];
 116   vorbis_info_floor      *floor_param[64];
 117   int                     residue_type[64];
 118   vorbis_info_residue    *residue_param[64];
 119   static_codebook        *book_param[256];
 120   codebook               *fullbooks;
 121
 122   vorbis_info_psy        *psy_param[4]; /* encode only */
 123   vorbis_info_psy_global psy_g_param;
 124
 125   bitrate_manager_info   bi;
 126   highlevel_encode_setup hi; /* used only by vorbisenc.c.  It's a
 127                                 highly redundant structure, but
 128                                 improves clarity of program flow. */
 129   int         halfrate_flag; /* painless downsample for decode */
 130 } codec_setup_info;
 131
 132 extern vorbis_look_psy_global *_vp_global_look(vorbis_info *vi);
 133 extern void _vp_global_free(vorbis_look_psy_global *look);
 134
 135
 136
 137 typedef struct {
 138   int sorted_index[VIF_POSIT+2];
 139   int forward_index[VIF_POSIT+2];
 140   int reverse_index[VIF_POSIT+2];
 141
 142   int hineighbor[VIF_POSIT];
 143   int loneighbor[VIF_POSIT];
 144   int posts;
 145
 146   int n;
 147   int quant_q;
 148   vorbis_info_floor1 *vi;
 149
 150   long phrasebits;
 151   long postbits;
 152   long frames;
 153 } vorbis_look_floor1;
 154
 155
 156
 157 extern int *floor1_fit(vorbis_block *vb,vorbis_look_floor1 *look,
 158                           const float *logmdct,   /* in */
 159                           const float *logmask);
 160 extern int *floor1_interpolate_fit(vorbis_block *vb,vorbis_look_floor1 *look,
 161                           int *A,int *B,
 162                           int del);
 163 extern int floor1_encode(oggpack_buffer *opb,vorbis_block *vb,
 164                   vorbis_look_floor1 *look,
 165                   int *post,int *ilogmask);
 166 #endif