From 56fbebdcf71ea7c8e64cb18ac3a78e5834134fa3 Mon Sep 17 00:00:00 2001 From: Monty Date: Mon, 2 Sep 2002 22:13:55 +0000 Subject: Put root level of Tremor in CVS git-svn-id: https://svn.xiph.org/trunk/Tremor@3890 0101bb08-14d6-0310-b084-bc0e0c8e3800 --- codebook.h | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 codebook.h (limited to 'codebook.h') diff --git a/codebook.h b/codebook.h new file mode 100644 index 0000000..13e5a14 --- /dev/null +++ b/codebook.h @@ -0,0 +1,99 @@ +/******************************************************************** + * * + * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. * + * * + * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 * + * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ * + * ALL REDISTRIBUTION RIGHTS RESERVED. * + * * + ******************************************************************** + + function: basic shared codebook operations + + ********************************************************************/ + +#ifndef _V_CODEBOOK_H_ +#define _V_CODEBOOK_H_ + +#include "ogg.h" + +/* This structure encapsulates huffman and VQ style encoding books; it + doesn't do anything specific to either. + + valuelist/quantlist are nonNULL (and q_* significant) only if + there's entry->value mapping to be done. + + If encode-side mapping must be done (and thus the entry needs to be + hunted), the auxiliary encode pointer will point to a decision + tree. This is true of both VQ and huffman, but is mostly useful + with VQ. + +*/ + +typedef struct static_codebook{ + long dim; /* codebook dimensions (elements per vector) */ + long entries; /* codebook entries */ + long *lengthlist; /* codeword lengths in bits */ + + /* mapping ***************************************************************/ + int maptype; /* 0=none + 1=implicitly populated values from map column + 2=listed arbitrary values */ + + /* The below does a linear, single monotonic sequence mapping. */ + long q_min; /* packed 32 bit float; quant value 0 maps to minval */ + long q_delta; /* packed 32 bit float; val 1 - val 0 == delta */ + int q_quant; /* bits: 0 < quant <= 16 */ + int q_sequencep; /* bitflag */ + + long *quantlist; /* map == 1: (int)(entries^(1/dim)) element column map + map == 2: list of dim*entries quantized entry vals + */ +} static_codebook; + +typedef struct codebook{ + long dim; /* codebook dimensions (elements per vector) */ + long entries; /* codebook entries */ + long used_entries; /* populated codebook entries */ + + /* the below are ordered by bitreversed codeword and only used + entries are populated */ + int binarypoint; + ogg_int32_t *valuelist; /* list of dim*entries actual entry values */ + ogg_uint32_t *codelist; /* list of bitstream codewords for each entry */ + + int *dec_index; + char *dec_codelengths; + ogg_uint32_t *dec_firsttable; + int dec_firsttablen; + int dec_maxlength; + + long q_min; /* packed 32 bit float; quant value 0 maps to minval */ + long q_delta; /* packed 32 bit float; val 1 - val 0 == delta */ + +} codebook; + +extern void vorbis_staticbook_clear(static_codebook *b); +extern void vorbis_staticbook_destroy(static_codebook *b); +extern int vorbis_book_init_decode(codebook *dest,const static_codebook *source); + +extern void vorbis_book_clear(codebook *b); +extern long _book_maptype1_quantvals(const static_codebook *b); + +extern int vorbis_staticbook_unpack(oggpack_buffer *b,static_codebook *c); + +extern long vorbis_book_decode(codebook *book, oggpack_buffer *b); +extern long vorbis_book_decodevs_add(codebook *book, ogg_int32_t *a, + oggpack_buffer *b,int n,int point); +extern long vorbis_book_decodev_set(codebook *book, ogg_int32_t *a, + oggpack_buffer *b,int n,int point); +extern long vorbis_book_decodev_add(codebook *book, ogg_int32_t *a, + oggpack_buffer *b,int n,int point); +extern long vorbis_book_decodevv_add(codebook *book, ogg_int32_t **a, + long off,int ch, + oggpack_buffer *b,int n,int point); + +extern int _ilog(unsigned int v); + + +#endif -- cgit v1.2.1