--- a/misc/libtremor/tremor/codebook.h Sun Oct 28 03:48:37 2012 +0100
+++ b/misc/libtremor/tremor/codebook.h Sun Oct 28 04:00:07 2012 +0100
@@ -20,33 +20,70 @@
#include "ogg.h"
-typedef struct codebook{
- long dim; /* codebook dimensions (elements per vector) */
- long entries; /* codebook entries */
- long used_entries; /* populated codebook entries */
+/* 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 */
- int dec_maxlength;
- void *dec_table;
- int dec_nodeb;
- int dec_leafw;
- int dec_type; /* 0 = entry number
- 1 = packed vector of values
- 2 = packed vector of column offsets, maptype 1
- 3 = scalar offset into value array, maptype 2 */
+ /* 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;
- ogg_int32_t q_min;
- int q_minp;
- ogg_int32_t q_del;
- int q_delp;
- int q_seq;
- int q_bits;
- int q_pack;
- void *q_val;
+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 int vorbis_book_unpack(oggpack_buffer *b,codebook *c);
+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,