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media/libvorbis/lib/backends.h@97036ab72558 (annotated)

media/libvorbis/lib/backends.h

Tue, 06 Jan 2015 21:39:09 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Tue, 06 Jan 2015 21:39:09 +0100
branch
TOR_BUG_9701
changeset 8
97036ab72558
permissions
-rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

michael@0 1 /********************************************************************
michael@0 2 * *
michael@0 3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
michael@0 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
michael@0 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
michael@0 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
michael@0 7 * *
michael@0 8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
michael@0 9 * by the Xiph.Org Foundation http://www.xiph.org/ *
michael@0 10 * *
michael@0 11 ********************************************************************
michael@0 12
michael@0 13 function: libvorbis backend and mapping structures; needed for
michael@0 14 static mode headers
michael@0 15 last mod: $Id: backends.h 16962 2010-03-11 07:30:34Z xiphmont $
michael@0 16
michael@0 17 ********************************************************************/
michael@0 18
michael@0 19 /* this is exposed up here because we need it for static modes.
michael@0 20 Lookups for each backend aren't exposed because there's no reason
michael@0 21 to do so */
michael@0 22
michael@0 23 #ifndef _vorbis_backend_h_
michael@0 24 #define _vorbis_backend_h_
michael@0 25
michael@0 26 #include "codec_internal.h"
michael@0 27
michael@0 28 /* this would all be simpler/shorter with templates, but.... */
michael@0 29 /* Floor backend generic *****************************************/
michael@0 30 typedef struct{
michael@0 31 void (*pack) (vorbis_info_floor *,oggpack_buffer *);
michael@0 32 vorbis_info_floor *(*unpack)(vorbis_info *,oggpack_buffer *);
michael@0 33 vorbis_look_floor *(*look) (vorbis_dsp_state *,vorbis_info_floor *);
michael@0 34 void (*free_info) (vorbis_info_floor *);
michael@0 35 void (*free_look) (vorbis_look_floor *);
michael@0 36 void *(*inverse1) (struct vorbis_block *,vorbis_look_floor *);
michael@0 37 int (*inverse2) (struct vorbis_block *,vorbis_look_floor *,
michael@0 38 void *buffer,float *);
michael@0 39 } vorbis_func_floor;
michael@0 40
michael@0 41 typedef struct{
michael@0 42 int order;
michael@0 43 long rate;
michael@0 44 long barkmap;
michael@0 45
michael@0 46 int ampbits;
michael@0 47 int ampdB;
michael@0 48
michael@0 49 int numbooks; /* <= 16 */
michael@0 50 int books[16];
michael@0 51
michael@0 52 float lessthan; /* encode-only config setting hacks for libvorbis */
michael@0 53 float greaterthan; /* encode-only config setting hacks for libvorbis */
michael@0 54
michael@0 55 } vorbis_info_floor0;
michael@0 56
michael@0 57
michael@0 58 #define VIF_POSIT 63
michael@0 59 #define VIF_CLASS 16
michael@0 60 #define VIF_PARTS 31
michael@0 61 typedef struct{
michael@0 62 int partitions; /* 0 to 31 */
michael@0 63 int partitionclass[VIF_PARTS]; /* 0 to 15 */
michael@0 64
michael@0 65 int class_dim[VIF_CLASS]; /* 1 to 8 */
michael@0 66 int class_subs[VIF_CLASS]; /* 0,1,2,3 (bits: 1<<n poss) */
michael@0 67 int class_book[VIF_CLASS]; /* subs ^ dim entries */
michael@0 68 int class_subbook[VIF_CLASS][8]; /* [VIF_CLASS][subs] */
michael@0 69
michael@0 70
michael@0 71 int mult; /* 1 2 3 or 4 */
michael@0 72 int postlist[VIF_POSIT+2]; /* first two implicit */
michael@0 73
michael@0 74
michael@0 75 /* encode side analysis parameters */
michael@0 76 float maxover;
michael@0 77 float maxunder;
michael@0 78 float maxerr;
michael@0 79
michael@0 80 float twofitweight;
michael@0 81 float twofitatten;
michael@0 82
michael@0 83 int n;
michael@0 84
michael@0 85 } vorbis_info_floor1;
michael@0 86
michael@0 87 /* Residue backend generic *****************************************/
michael@0 88 typedef struct{
michael@0 89 void (*pack) (vorbis_info_residue *,oggpack_buffer *);
michael@0 90 vorbis_info_residue *(*unpack)(vorbis_info *,oggpack_buffer *);
michael@0 91 vorbis_look_residue *(*look) (vorbis_dsp_state *,
michael@0 92 vorbis_info_residue *);
michael@0 93 void (*free_info) (vorbis_info_residue *);
michael@0 94 void (*free_look) (vorbis_look_residue *);
michael@0 95 long **(*class) (struct vorbis_block *,vorbis_look_residue *,
michael@0 96 int **,int *,int);
michael@0 97 int (*forward) (oggpack_buffer *,struct vorbis_block *,
michael@0 98 vorbis_look_residue *,
michael@0 99 int **,int *,int,long **,int);
michael@0 100 int (*inverse) (struct vorbis_block *,vorbis_look_residue *,
michael@0 101 float **,int *,int);
michael@0 102 } vorbis_func_residue;
michael@0 103
michael@0 104 typedef struct vorbis_info_residue0{
michael@0 105 /* block-partitioned VQ coded straight residue */
michael@0 106 long begin;
michael@0 107 long end;
michael@0 108
michael@0 109 /* first stage (lossless partitioning) */
michael@0 110 int grouping; /* group n vectors per partition */
michael@0 111 int partitions; /* possible codebooks for a partition */
michael@0 112 int partvals; /* partitions ^ groupbook dim */
michael@0 113 int groupbook; /* huffbook for partitioning */
michael@0 114 int secondstages[64]; /* expanded out to pointers in lookup */
michael@0 115 int booklist[512]; /* list of second stage books */
michael@0 116
michael@0 117 const int classmetric1[64];
michael@0 118 const int classmetric2[64];
michael@0 119 } vorbis_info_residue0;
michael@0 120
michael@0 121 /* Mapping backend generic *****************************************/
michael@0 122 typedef struct{
michael@0 123 void (*pack) (vorbis_info *,vorbis_info_mapping *,
michael@0 124 oggpack_buffer *);
michael@0 125 vorbis_info_mapping *(*unpack)(vorbis_info *,oggpack_buffer *);
michael@0 126 void (*free_info) (vorbis_info_mapping *);
michael@0 127 int (*forward) (struct vorbis_block *vb);
michael@0 128 int (*inverse) (struct vorbis_block *vb,vorbis_info_mapping *);
michael@0 129 } vorbis_func_mapping;
michael@0 130
michael@0 131 typedef struct vorbis_info_mapping0{
michael@0 132 int submaps; /* <= 16 */
michael@0 133 int chmuxlist[256]; /* up to 256 channels in a Vorbis stream */
michael@0 134
michael@0 135 int floorsubmap[16]; /* [mux] submap to floors */
michael@0 136 int residuesubmap[16]; /* [mux] submap to residue */
michael@0 137
michael@0 138 int coupling_steps;
michael@0 139 int coupling_mag[256];
michael@0 140 int coupling_ang[256];
michael@0 141
michael@0 142 } vorbis_info_mapping0;
michael@0 143
michael@0 144 #endif

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