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d9a291f641
Took the opportunity to undo the Godot changed made to the opus source. The opus module should eventually be built in its own environment to avoid polluting others with too many include dirs and defines. TODO: Fix the platform/ stuff for opus.
119 lines
4.9 KiB
C++
119 lines
4.9 KiB
C++
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2015 *
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* by the Xiph.Org Foundation http://www.xiph.org/ *
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* *
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********************************************************************
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function: basic shared codebook operations
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last mod: $Id: codebook.h 19457 2015-03-03 00:15:29Z giles $
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********************************************************************/
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#ifndef _V_CODEBOOK_H_
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#define _V_CODEBOOK_H_
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#include <ogg/ogg.h>
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/* This structure encapsulates huffman and VQ style encoding books; it
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doesn't do anything specific to either.
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valuelist/quantlist are nonNULL (and q_* significant) only if
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there's entry->value mapping to be done.
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If encode-side mapping must be done (and thus the entry needs to be
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hunted), the auxiliary encode pointer will point to a decision
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tree. This is true of both VQ and huffman, but is mostly useful
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with VQ.
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*/
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typedef struct static_codebook{
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long dim; /* codebook dimensions (elements per vector) */
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long entries; /* codebook entries */
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char *lengthlist; /* codeword lengths in bits */
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/* mapping ***************************************************************/
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int maptype; /* 0=none
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1=implicitly populated values from map column
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2=listed arbitrary values */
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/* The below does a linear, single monotonic sequence mapping. */
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long q_min; /* packed 32 bit float; quant value 0 maps to minval */
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long q_delta; /* packed 32 bit float; val 1 - val 0 == delta */
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int q_quant; /* bits: 0 < quant <= 16 */
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int q_sequencep; /* bitflag */
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long *quantlist; /* map == 1: (int)(entries^(1/dim)) element column map
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map == 2: list of dim*entries quantized entry vals
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*/
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int allocedp;
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} static_codebook;
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typedef struct codebook{
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long dim; /* codebook dimensions (elements per vector) */
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long entries; /* codebook entries */
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long used_entries; /* populated codebook entries */
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const static_codebook *c;
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/* for encode, the below are entry-ordered, fully populated */
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/* for decode, the below are ordered by bitreversed codeword and only
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used entries are populated */
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float *valuelist; /* list of dim*entries actual entry values */
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ogg_uint32_t *codelist; /* list of bitstream codewords for each entry */
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int *dec_index; /* only used if sparseness collapsed */
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char *dec_codelengths;
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ogg_uint32_t *dec_firsttable;
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int dec_firsttablen;
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int dec_maxlength;
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/* The current encoder uses only centered, integer-only lattice books. */
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int quantvals;
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int minval;
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int delta;
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} codebook;
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extern void vorbis_staticbook_destroy(static_codebook *b);
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extern int vorbis_book_init_encode(codebook *dest,const static_codebook *source);
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extern int vorbis_book_init_decode(codebook *dest,const static_codebook *source);
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extern void vorbis_book_clear(codebook *b);
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extern float *_book_unquantize(const static_codebook *b,int n,int *map);
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extern float *_book_logdist(const static_codebook *b,float *vals);
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extern float _float32_unpack(long val);
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extern long _float32_pack(float val);
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extern int _best(codebook *book, float *a, int step);
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extern long _book_maptype1_quantvals(const static_codebook *b);
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extern int vorbis_book_besterror(codebook *book,float *a,int step,int addmul);
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extern long vorbis_book_codeword(codebook *book,int entry);
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extern long vorbis_book_codelen(codebook *book,int entry);
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extern int vorbis_staticbook_pack(const static_codebook *c,oggpack_buffer *b);
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extern static_codebook *vorbis_staticbook_unpack(oggpack_buffer *b);
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extern int vorbis_book_encode(codebook *book, int a, oggpack_buffer *b);
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extern long vorbis_book_decode(codebook *book, oggpack_buffer *b);
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extern long vorbis_book_decodevs_add(codebook *book, float *a,
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oggpack_buffer *b,int n);
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extern long vorbis_book_decodev_set(codebook *book, float *a,
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oggpack_buffer *b,int n);
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extern long vorbis_book_decodev_add(codebook *book, float *a,
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oggpack_buffer *b,int n);
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extern long vorbis_book_decodevv_add(codebook *book, float **a,
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long off,int ch,
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oggpack_buffer *b,int n);
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#endif
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