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codec_internal.h (4431B)
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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 1994-2002 *
9 * by the XIPHOPHORUS Company http://www.xiph.org/ *
10 * *
11 ********************************************************************
12
13 function: libvorbis codec headers
14 last mod: $Id: codec_internal.h 1919 2005-07-24 14:18:04Z baford $
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 ogg_uint32_t packetblob_markers[PACKETBLOBS];
37 } vorbis_block_internal;
38
39 typedef void vorbis_look_floor;
40 typedef void vorbis_look_residue;
41 typedef void vorbis_look_transform;
42
43 /* mode ************************************************************/
44 typedef struct {
45 int blockflag;
46 int windowtype;
47 int transformtype;
48 int mapping;
49 } vorbis_info_mode;
50
51 typedef void vorbis_info_floor;
52 typedef void vorbis_info_residue;
53 typedef void vorbis_info_mapping;
54
55 #include "psy.h"
56 #include "bitrate.h"
57
58 typedef struct private_state {
59 /* local lookup storage */
60 envelope_lookup *ve; /* envelope lookup */
61 int window[2];
62 vorbis_look_transform **transform[2]; /* block, type */
63 drft_lookup fft_look[2];
64
65 int modebits;
66 vorbis_look_floor **flr;
67 vorbis_look_residue **residue;
68 vorbis_look_psy *psy;
69 vorbis_look_psy_global *psy_g_look;
70
71 /* local storage, only used on the encoding side. This way the
72 application does not need to worry about freeing some packets'
73 memory and not others'; packet storage is always tracked.
74 Cleared next call to a _dsp_ function */
75 unsigned char *header;
76 unsigned char *header1;
77 unsigned char *header2;
78
79 bitrate_manager_state bms;
80
81 ogg_int64_t sample_count;
82 } private_state;
83
84 /* codec_setup_info contains all the setup information specific to the
85 specific compression/decompression mode in progress (eg,
86 psychoacoustic settings, channel setup, options, codebook
87 etc).
88 *********************************************************************/
89
90 #include "highlevel.h"
91 typedef struct codec_setup_info {
92
93 /* Vorbis supports only short and long blocks, but allows the
94 encoder to choose the sizes */
95
96 long blocksizes[2];
97
98 /* modes are the primary means of supporting on-the-fly different
99 blocksizes, different channel mappings (LR or M/A),
100 different residue backends, etc. Each mode consists of a
101 blocksize flag and a mapping (along with the mapping setup */
102
103 int modes;
104 int maps;
105 int floors;
106 int residues;
107 int books;
108 int psys; /* encode only */
109
110 vorbis_info_mode *mode_param[64];
111 int map_type[64];
112 vorbis_info_mapping *map_param[64];
113 int floor_type[64];
114 vorbis_info_floor *floor_param[64];
115 int residue_type[64];
116 vorbis_info_residue *residue_param[64];
117 static_codebook *book_param[256];
118 codebook *fullbooks;
119
120 vorbis_info_psy *psy_param[4]; /* encode only */
121 vorbis_info_psy_global psy_g_param;
122
123 bitrate_manager_info bi;
124 highlevel_encode_setup hi; /* used only by vorbisenc.c. It's a
125 highly redundant structure, but
126 improves clarity of program flow. */
127 int halfrate_flag; /* painless downsample for decode */
128 } codec_setup_info;
129
130 extern vorbis_look_psy_global *_vp_global_look(vorbis_info *vi);
131 extern void _vp_global_free(vorbis_look_psy_global *look);
132
133 #endif
134