18 #ifndef _V_CODEBOOK_H_ |
18 #ifndef _V_CODEBOOK_H_ |
19 #define _V_CODEBOOK_H_ |
19 #define _V_CODEBOOK_H_ |
20 |
20 |
21 #include "ogg.h" |
21 #include "ogg.h" |
22 |
22 |
|
23 /* This structure encapsulates huffman and VQ style encoding books; it |
|
24 doesn't do anything specific to either. |
|
25 |
|
26 valuelist/quantlist are nonNULL (and q_* significant) only if |
|
27 there's entry->value mapping to be done. |
|
28 |
|
29 If encode-side mapping must be done (and thus the entry needs to be |
|
30 hunted), the auxiliary encode pointer will point to a decision |
|
31 tree. This is true of both VQ and huffman, but is mostly useful |
|
32 with VQ. |
|
33 |
|
34 */ |
|
35 |
|
36 typedef struct static_codebook{ |
|
37 long dim; /* codebook dimensions (elements per vector) */ |
|
38 long entries; /* codebook entries */ |
|
39 long *lengthlist; /* codeword lengths in bits */ |
|
40 |
|
41 /* mapping ***************************************************************/ |
|
42 int maptype; /* 0=none |
|
43 1=implicitly populated values from map column |
|
44 2=listed arbitrary values */ |
|
45 |
|
46 /* The below does a linear, single monotonic sequence mapping. */ |
|
47 long q_min; /* packed 32 bit float; quant value 0 maps to minval */ |
|
48 long q_delta; /* packed 32 bit float; val 1 - val 0 == delta */ |
|
49 int q_quant; /* bits: 0 < quant <= 16 */ |
|
50 int q_sequencep; /* bitflag */ |
|
51 |
|
52 long *quantlist; /* map == 1: (int)(entries^(1/dim)) element column map |
|
53 map == 2: list of dim*entries quantized entry vals |
|
54 */ |
|
55 } static_codebook; |
|
56 |
23 typedef struct codebook{ |
57 typedef struct codebook{ |
24 long dim; /* codebook dimensions (elements per vector) */ |
58 long dim; /* codebook dimensions (elements per vector) */ |
25 long entries; /* codebook entries */ |
59 long entries; /* codebook entries */ |
26 long used_entries; /* populated codebook entries */ |
60 long used_entries; /* populated codebook entries */ |
27 |
61 |
28 int dec_maxlength; |
62 /* the below are ordered by bitreversed codeword and only used |
29 void *dec_table; |
63 entries are populated */ |
30 int dec_nodeb; |
64 int binarypoint; |
31 int dec_leafw; |
65 ogg_int32_t *valuelist; /* list of dim*entries actual entry values */ |
32 int dec_type; /* 0 = entry number |
66 ogg_uint32_t *codelist; /* list of bitstream codewords for each entry */ |
33 1 = packed vector of values |
|
34 2 = packed vector of column offsets, maptype 1 |
|
35 3 = scalar offset into value array, maptype 2 */ |
|
36 |
67 |
37 ogg_int32_t q_min; |
68 int *dec_index; |
38 int q_minp; |
69 char *dec_codelengths; |
39 ogg_int32_t q_del; |
70 ogg_uint32_t *dec_firsttable; |
40 int q_delp; |
71 int dec_firsttablen; |
41 int q_seq; |
72 int dec_maxlength; |
42 int q_bits; |
73 |
43 int q_pack; |
74 long q_min; /* packed 32 bit float; quant value 0 maps to minval */ |
44 void *q_val; |
75 long q_delta; /* packed 32 bit float; val 1 - val 0 == delta */ |
45 |
76 |
46 } codebook; |
77 } codebook; |
47 |
78 |
|
79 extern void vorbis_staticbook_clear(static_codebook *b); |
|
80 extern void vorbis_staticbook_destroy(static_codebook *b); |
|
81 extern int vorbis_book_init_decode(codebook *dest,const static_codebook *source); |
|
82 |
48 extern void vorbis_book_clear(codebook *b); |
83 extern void vorbis_book_clear(codebook *b); |
49 extern int vorbis_book_unpack(oggpack_buffer *b,codebook *c); |
84 extern long _book_maptype1_quantvals(const static_codebook *b); |
|
85 |
|
86 extern int vorbis_staticbook_unpack(oggpack_buffer *b,static_codebook *c); |
50 |
87 |
51 extern long vorbis_book_decode(codebook *book, oggpack_buffer *b); |
88 extern long vorbis_book_decode(codebook *book, oggpack_buffer *b); |
52 extern long vorbis_book_decodevs_add(codebook *book, ogg_int32_t *a, |
89 extern long vorbis_book_decodevs_add(codebook *book, ogg_int32_t *a, |
53 oggpack_buffer *b,int n,int point); |
90 oggpack_buffer *b,int n,int point); |
54 extern long vorbis_book_decodev_set(codebook *book, ogg_int32_t *a, |
91 extern long vorbis_book_decodev_set(codebook *book, ogg_int32_t *a, |