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media/libtremor/lib/backends.h@6474c204b198 (annotated)

media/libtremor/lib/backends.h

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/********************************************************************
michael@0	2	* *
michael@0	3	* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
michael@0	4	* *
michael@0	5	* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
michael@0	6	* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
michael@0	7	* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
michael@0	8	* *
michael@0	9	* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
michael@0	10	* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
michael@0	11	* *
michael@0	12	********************************************************************
michael@0	13
michael@0	14	function: backend and mapping structures
michael@0	15
michael@0	16	********************************************************************/
michael@0	17
michael@0	18	/* this is exposed up here because we need it for static modes.
michael@0	19	Lookups for each backend aren't exposed because there's no reason
michael@0	20	to do so */
michael@0	21
michael@0	22	#ifndef _vorbis_backend_h_
michael@0	23	#define _vorbis_backend_h_
michael@0	24
michael@0	25	#include "codec_internal.h"
michael@0	26
michael@0	27	/* this would all be simpler/shorter with templates, but.... */
michael@0	28	/* Transform backend generic *************************************/
michael@0	29
michael@0	30	/* only mdct right now. Flesh it out more if we ever transcend mdct
michael@0	31	in the transform domain */
michael@0	32
michael@0	33	/* Floor backend generic *****************************************/
michael@0	34	typedef struct{
michael@0	35	vorbis_info_floor *(*unpack)(vorbis_info *,oggpack_buffer *);
michael@0	36	vorbis_look_floor *(*look) (vorbis_dsp_state *,vorbis_info_mode *,
michael@0	37	vorbis_info_floor *);
michael@0	38	void (*free_info) (vorbis_info_floor *);
michael@0	39	void (*free_look) (vorbis_look_floor *);
michael@0	40	void *(*inverse1) (struct vorbis_block *,vorbis_look_floor *);
michael@0	41	int (*inverse2) (struct vorbis_block *,vorbis_look_floor *,
michael@0	42	void *buffer,ogg_int32_t *);
michael@0	43	} vorbis_func_floor;
michael@0	44
michael@0	45	typedef struct{
michael@0	46	int order;
michael@0	47	long rate;
michael@0	48	long barkmap;
michael@0	49
michael@0	50	int ampbits;
michael@0	51	int ampdB;
michael@0	52
michael@0	53	int numbooks; /* <= 16 */
michael@0	54	int books[16];
michael@0	55
michael@0	56	} vorbis_info_floor0;
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	} vorbis_info_floor1;
michael@0	75
michael@0	76	/* Residue backend generic *****************************************/
michael@0	77	typedef struct{
michael@0	78	vorbis_info_residue *(*unpack)(vorbis_info *,oggpack_buffer *);
michael@0	79	vorbis_look_residue *(*look) (vorbis_dsp_state *,vorbis_info_mode *,
michael@0	80	vorbis_info_residue *);
michael@0	81	void (*free_info) (vorbis_info_residue *);
michael@0	82	void (*free_look) (vorbis_look_residue *);
michael@0	83	int (*inverse) (struct vorbis_block *,vorbis_look_residue *,
michael@0	84	ogg_int32_t **,int *,int);
michael@0	85	} vorbis_func_residue;
michael@0	86
michael@0	87	typedef struct vorbis_info_residue0{
michael@0	88	/* block-partitioned VQ coded straight residue */
michael@0	89	long begin;
michael@0	90	long end;
michael@0	91
michael@0	92	/* first stage (lossless partitioning) */
michael@0	93	int grouping; /* group n vectors per partition */
michael@0	94	int partitions; /* possible codebooks for a partition */
michael@0	95	int partvals; /* partitions ^ groupbook dim */
michael@0	96	int groupbook; /* huffbook for partitioning */
michael@0	97	int secondstages[64]; /* expanded out to pointers in lookup */
michael@0	98	int booklist[512]; /* list of second stage books */
michael@0	99	} vorbis_info_residue0;
michael@0	100
michael@0	101	/* Mapping backend generic *****************************************/
michael@0	102	typedef struct{
michael@0	103	vorbis_info_mapping *(*unpack)(vorbis_info *,oggpack_buffer *);
michael@0	104	vorbis_look_mapping *(*look) (vorbis_dsp_state *,vorbis_info_mode *,
michael@0	105	vorbis_info_mapping *);
michael@0	106	void (*free_info) (vorbis_info_mapping *);
michael@0	107	void (*free_look) (vorbis_look_mapping *);
michael@0	108	int (*inverse) (struct vorbis_block *vb,vorbis_look_mapping *);
michael@0	109	} vorbis_func_mapping;
michael@0	110
michael@0	111	typedef struct vorbis_info_mapping0{
michael@0	112	int submaps; /* <= 16 */
michael@0	113	int chmuxlist[256]; /* up to 256 channels in a Vorbis stream */
michael@0	114
michael@0	115	int floorsubmap[16]; /* [mux] submap to floors */
michael@0	116	int residuesubmap[16]; /* [mux] submap to residue */
michael@0	117
michael@0	118	int psy[2]; /* by blocktype; impulse/padding for short,
michael@0	119	transition/normal for long */
michael@0	120
michael@0	121	int coupling_steps;
michael@0	122	int coupling_mag[256];
michael@0	123	int coupling_ang[256];
michael@0	124	} vorbis_info_mapping0;
michael@0	125
michael@0	126	#endif
michael@0	127
michael@0	128
michael@0	129
michael@0	130
michael@0	131