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annotate libs/vorbis/codec_internal.h @ 1:e7ca128b8713

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looks nice :)
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 02 Feb 2014 00:35:22 +0200
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nuclear@0 1 /********************************************************************
nuclear@0 2 * *
nuclear@0 3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
nuclear@0 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
nuclear@0 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
nuclear@0 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
nuclear@0 7 * *
nuclear@0 8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
nuclear@0 9 * by the Xiph.Org Foundation http://www.xiph.org/ *
nuclear@0 10 * *
nuclear@0 11 ********************************************************************
nuclear@0 12
nuclear@0 13 function: libvorbis codec headers
nuclear@0 14 last mod: $Id: codec_internal.h 16227 2009-07-08 06:58:46Z xiphmont $
nuclear@0 15
nuclear@0 16 ********************************************************************/
nuclear@0 17
nuclear@0 18 #ifndef _V_CODECI_H_
nuclear@0 19 #define _V_CODECI_H_
nuclear@0 20
nuclear@0 21 #include "envelope.h"
nuclear@0 22 #include "codebook.h"
nuclear@0 23
nuclear@0 24 #define BLOCKTYPE_IMPULSE 0
nuclear@0 25 #define BLOCKTYPE_PADDING 1
nuclear@0 26 #define BLOCKTYPE_TRANSITION 0
nuclear@0 27 #define BLOCKTYPE_LONG 1
nuclear@0 28
nuclear@0 29 #define PACKETBLOBS 15
nuclear@0 30
nuclear@0 31 typedef struct vorbis_block_internal{
nuclear@0 32 float **pcmdelay; /* this is a pointer into local storage */
nuclear@0 33 float ampmax;
nuclear@0 34 int blocktype;
nuclear@0 35
nuclear@0 36 oggpack_buffer *packetblob[PACKETBLOBS]; /* initialized, must be freed;
nuclear@0 37 blob [PACKETBLOBS/2] points to
nuclear@0 38 the oggpack_buffer in the
nuclear@0 39 main vorbis_block */
nuclear@0 40 } vorbis_block_internal;
nuclear@0 41
nuclear@0 42 typedef void vorbis_look_floor;
nuclear@0 43 typedef void vorbis_look_residue;
nuclear@0 44 typedef void vorbis_look_transform;
nuclear@0 45
nuclear@0 46 /* mode ************************************************************/
nuclear@0 47 typedef struct {
nuclear@0 48 int blockflag;
nuclear@0 49 int windowtype;
nuclear@0 50 int transformtype;
nuclear@0 51 int mapping;
nuclear@0 52 } vorbis_info_mode;
nuclear@0 53
nuclear@0 54 typedef void vorbis_info_floor;
nuclear@0 55 typedef void vorbis_info_residue;
nuclear@0 56 typedef void vorbis_info_mapping;
nuclear@0 57
nuclear@0 58 #include "psy.h"
nuclear@0 59 #include "bitrate.h"
nuclear@0 60
nuclear@0 61 typedef struct private_state {
nuclear@0 62 /* local lookup storage */
nuclear@0 63 envelope_lookup *ve; /* envelope lookup */
nuclear@0 64 int window[2];
nuclear@0 65 vorbis_look_transform **transform[2]; /* block, type */
nuclear@0 66 drft_lookup fft_look[2];
nuclear@0 67
nuclear@0 68 int modebits;
nuclear@0 69 vorbis_look_floor **flr;
nuclear@0 70 vorbis_look_residue **residue;
nuclear@0 71 vorbis_look_psy *psy;
nuclear@0 72 vorbis_look_psy_global *psy_g_look;
nuclear@0 73
nuclear@0 74 /* local storage, only used on the encoding side. This way the
nuclear@0 75 application does not need to worry about freeing some packets'
nuclear@0 76 memory and not others'; packet storage is always tracked.
nuclear@0 77 Cleared next call to a _dsp_ function */
nuclear@0 78 unsigned char *header;
nuclear@0 79 unsigned char *header1;
nuclear@0 80 unsigned char *header2;
nuclear@0 81
nuclear@0 82 bitrate_manager_state bms;
nuclear@0 83
nuclear@0 84 ogg_int64_t sample_count;
nuclear@0 85 } private_state;
nuclear@0 86
nuclear@0 87 /* codec_setup_info contains all the setup information specific to the
nuclear@0 88 specific compression/decompression mode in progress (eg,
nuclear@0 89 psychoacoustic settings, channel setup, options, codebook
nuclear@0 90 etc).
nuclear@0 91 *********************************************************************/
nuclear@0 92
nuclear@0 93 #include "highlevel.h"
nuclear@0 94 typedef struct codec_setup_info {
nuclear@0 95
nuclear@0 96 /* Vorbis supports only short and long blocks, but allows the
nuclear@0 97 encoder to choose the sizes */
nuclear@0 98
nuclear@0 99 long blocksizes[2];
nuclear@0 100
nuclear@0 101 /* modes are the primary means of supporting on-the-fly different
nuclear@0 102 blocksizes, different channel mappings (LR or M/A),
nuclear@0 103 different residue backends, etc. Each mode consists of a
nuclear@0 104 blocksize flag and a mapping (along with the mapping setup */
nuclear@0 105
nuclear@0 106 int modes;
nuclear@0 107 int maps;
nuclear@0 108 int floors;
nuclear@0 109 int residues;
nuclear@0 110 int books;
nuclear@0 111 int psys; /* encode only */
nuclear@0 112
nuclear@0 113 vorbis_info_mode *mode_param[64];
nuclear@0 114 int map_type[64];
nuclear@0 115 vorbis_info_mapping *map_param[64];
nuclear@0 116 int floor_type[64];
nuclear@0 117 vorbis_info_floor *floor_param[64];
nuclear@0 118 int residue_type[64];
nuclear@0 119 vorbis_info_residue *residue_param[64];
nuclear@0 120 static_codebook *book_param[256];
nuclear@0 121 codebook *fullbooks;
nuclear@0 122
nuclear@0 123 vorbis_info_psy *psy_param[4]; /* encode only */
nuclear@0 124 vorbis_info_psy_global psy_g_param;
nuclear@0 125
nuclear@0 126 bitrate_manager_info bi;
nuclear@0 127 highlevel_encode_setup hi; /* used only by vorbisenc.c. It's a
nuclear@0 128 highly redundant structure, but
nuclear@0 129 improves clarity of program flow. */
nuclear@0 130 int halfrate_flag; /* painless downsample for decode */
nuclear@0 131 } codec_setup_info;
nuclear@0 132
nuclear@0 133 extern vorbis_look_psy_global *_vp_global_look(vorbis_info *vi);
nuclear@0 134 extern void _vp_global_free(vorbis_look_psy_global *look);
nuclear@0 135
nuclear@0 136
nuclear@0 137
nuclear@0 138 typedef struct {
nuclear@0 139 int sorted_index[VIF_POSIT+2];
nuclear@0 140 int forward_index[VIF_POSIT+2];
nuclear@0 141 int reverse_index[VIF_POSIT+2];
nuclear@0 142
nuclear@0 143 int hineighbor[VIF_POSIT];
nuclear@0 144 int loneighbor[VIF_POSIT];
nuclear@0 145 int posts;
nuclear@0 146
nuclear@0 147 int n;
nuclear@0 148 int quant_q;
nuclear@0 149 vorbis_info_floor1 *vi;
nuclear@0 150
nuclear@0 151 long phrasebits;
nuclear@0 152 long postbits;
nuclear@0 153 long frames;
nuclear@0 154 } vorbis_look_floor1;
nuclear@0 155
nuclear@0 156
nuclear@0 157
nuclear@0 158 extern int *floor1_fit(vorbis_block *vb,vorbis_look_floor1 *look,
nuclear@0 159 const float *logmdct, /* in */
nuclear@0 160 const float *logmask);
nuclear@0 161 extern int *floor1_interpolate_fit(vorbis_block *vb,vorbis_look_floor1 *look,
nuclear@0 162 int *A,int *B,
nuclear@0 163 int del);
nuclear@0 164 extern int floor1_encode(oggpack_buffer *opb,vorbis_block *vb,
nuclear@0 165 vorbis_look_floor1 *look,
nuclear@0 166 int *post,int *ilogmask);
nuclear@0 167 #endif