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
168