Chris@1: /******************************************************************** Chris@1: * * Chris@1: * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * Chris@1: * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * Chris@1: * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * Chris@1: * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * Chris@1: * * Chris@1: * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * Chris@1: * by the Xiph.Org Foundation http://www.xiph.org/ * Chris@1: * * Chris@1: ******************************************************************** Chris@1: Chris@1: function: basic shared codebook operations Chris@1: last mod: $Id: localcodebook.h 16959 2010-03-10 16:03:11Z xiphmont $ Chris@1: Chris@1: ********************************************************************/ Chris@1: Chris@1: #ifndef _V_CODEBOOK_H_ Chris@1: #define _V_CODEBOOK_H_ Chris@1: Chris@1: #include Chris@1: Chris@1: /* This structure encapsulates huffman and VQ style encoding books; it Chris@1: doesn't do anything specific to either. Chris@1: Chris@1: valuelist/quantlist are nonNULL (and q_* significant) only if Chris@1: there's entry->value mapping to be done. Chris@1: Chris@1: If encode-side mapping must be done (and thus the entry needs to be Chris@1: hunted), the auxiliary encode pointer will point to a decision Chris@1: tree. This is true of both VQ and huffman, but is mostly useful Chris@1: with VQ. Chris@1: Chris@1: */ Chris@1: Chris@1: typedef struct static_codebook{ Chris@1: long dim; /* codebook dimensions (elements per vector) */ Chris@1: long entries; /* codebook entries */ Chris@1: long *lengthlist; /* codeword lengths in bits */ Chris@1: Chris@1: /* mapping ***************************************************************/ Chris@1: int maptype; /* 0=none Chris@1: 1=implicitly populated values from map column Chris@1: 2=listed arbitrary values */ Chris@1: Chris@1: /* The below does a linear, single monotonic sequence mapping. */ Chris@1: long q_min; /* packed 32 bit float; quant value 0 maps to minval */ Chris@1: long q_delta; /* packed 32 bit float; val 1 - val 0 == delta */ Chris@1: int q_quant; /* bits: 0 < quant <= 16 */ Chris@1: int q_sequencep; /* bitflag */ Chris@1: Chris@1: long *quantlist; /* map == 1: (int)(entries^(1/dim)) element column map Chris@1: map == 2: list of dim*entries quantized entry vals Chris@1: */ Chris@1: int allocedp; Chris@1: } static_codebook; Chris@1: Chris@1: typedef struct codebook{ Chris@1: long dim; /* codebook dimensions (elements per vector) */ Chris@1: long entries; /* codebook entries */ Chris@1: long used_entries; /* populated codebook entries */ Chris@1: static_codebook *c; Chris@1: Chris@1: /* for encode, the below are entry-ordered, fully populated */ Chris@1: /* for decode, the below are ordered by bitreversed codeword and only Chris@1: used entries are populated */ Chris@1: float *valuelist; /* list of dim*entries actual entry values */ Chris@1: ogg_uint32_t *codelist; /* list of bitstream codewords for each entry */ Chris@1: Chris@1: int *dec_index; /* only used if sparseness collapsed */ Chris@1: char *dec_codelengths; Chris@1: ogg_uint32_t *dec_firsttable; Chris@1: int dec_firsttablen; Chris@1: int dec_maxlength; Chris@1: Chris@1: /* The current encoder uses only centered, integer-only lattice books. */ Chris@1: int quantvals; Chris@1: int minval; Chris@1: int delta; Chris@1: Chris@1: } codebook; Chris@1: Chris@1: extern void vorbis_staticbook_clear(static_codebook *b); Chris@1: extern void vorbis_staticbook_destroy(static_codebook *b); Chris@1: extern int vorbis_book_init_encode(codebook *dest,const static_codebook *source); Chris@1: extern int vorbis_book_init_decode(codebook *dest,const static_codebook *source); Chris@1: extern void vorbis_book_clear(codebook *b); Chris@1: Chris@1: extern float *_book_unquantize(const static_codebook *b,int n,int *map); Chris@1: extern float *_book_logdist(const static_codebook *b,float *vals); Chris@1: extern float _float32_unpack(long val); Chris@1: extern long _float32_pack(float val); Chris@1: extern int _best(codebook *book, float *a, int step); Chris@1: extern int _ilog(unsigned int v); Chris@1: extern long _book_maptype1_quantvals(const static_codebook *b); Chris@1: Chris@1: extern int vorbis_book_besterror(codebook *book,float *a,int step,int addmul); Chris@1: extern long vorbis_book_codeword(codebook *book,int entry); Chris@1: extern long vorbis_book_codelen(codebook *book,int entry); Chris@1: Chris@1: Chris@1: Chris@1: extern int vorbis_staticbook_pack(const static_codebook *c,oggpack_buffer *b); Chris@1: extern int vorbis_staticbook_unpack(oggpack_buffer *b,static_codebook *c); Chris@1: Chris@1: extern int vorbis_book_encode(codebook *book, int a, oggpack_buffer *b); Chris@1: Chris@1: extern long vorbis_book_decode(codebook *book, oggpack_buffer *b); Chris@1: extern long vorbis_book_decodevs_add(codebook *book, float *a, Chris@1: oggpack_buffer *b,int n); Chris@1: extern long vorbis_book_decodev_set(codebook *book, float *a, Chris@1: oggpack_buffer *b,int n); Chris@1: extern long vorbis_book_decodev_add(codebook *book, float *a, Chris@1: oggpack_buffer *b,int n); Chris@1: extern long vorbis_book_decodevv_add(codebook *book, float **a, Chris@1: long off,int ch, Chris@1: oggpack_buffer *b,int n); Chris@1: Chris@1: Chris@1: Chris@1: #endif