move mp3 stuff to /sys/src/cmd/audio, add ogg vorbis, add play

1 files changed, 160 insertions, 0 deletions

diff --git a/sys/src/cmd/audio/libvorbis/codebook.h b/sys/src/cmd/audio/libvorbis/codebook.h
new file mode 100644
index 000000000..170b7edf1
--- /dev/null
+++ b/sys/src/cmd/audio/libvorbis/codebook.h
@@ -0,0 +1,160 @@
+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
+ *                                                                  *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002             *
+ * by the XIPHOPHORUS Company http://www.xiph.org/                  *
+ *                                                                  *
+ ********************************************************************
+
+ function: basic shared codebook operations
+ last mod: $Id: codebook.h,v 1.13 2002/06/28 22:19:35 xiphmont Exp $
+
+ ********************************************************************/
+
+#ifndef _V_CODEBOOK_H_
+#define _V_CODEBOOK_H_
+
+#include <ogg/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
+			*/
+
+  /* encode helpers ********************************************************/
+  struct encode_aux_nearestmatch *nearest_tree;
+  struct encode_aux_threshmatch  *thresh_tree;
+  struct encode_aux_pigeonhole  *pigeon_tree;
+
+  int allocedp;
+} static_codebook;
+
+/* this structures an arbitrary trained book to quickly find the
+   nearest cell match */
+typedef struct encode_aux_nearestmatch{
+  /* pre-calculated partitioning tree */
+  long   *ptr0;
+  long   *ptr1;
+
+  long   *p;         /* decision points (each is an entry) */
+  long   *q;         /* decision points (each is an entry) */
+  long   aux;        /* number of tree entries */
+  long   alloc;       
+} encode_aux_nearestmatch;
+
+/* assumes a maptype of 1; encode side only, so that's OK */
+typedef struct encode_aux_threshmatch{
+  float *quantthresh;
+  long   *quantmap;
+  int     quantvals; 
+  int     threshvals; 
+} encode_aux_threshmatch;
+
+typedef struct encode_aux_pigeonhole{
+  float min;
+  float del;
+
+  int  mapentries;
+  int  quantvals;
+  long *pigeonmap;
+
+  long fittotal;
+  long *fitlist;
+  long *fitmap;
+  long *fitlength;
+} encode_aux_pigeonhole;
+
+typedef struct codebook{
+  long dim;           /* codebook dimensions (elements per vector) */
+  long entries;       /* codebook entries */
+  long used_entries;  /* populated codebook entries */
+  const static_codebook *c;
+
+  /* for encode, the below are entry-ordered, fully populated */
+  /* for decode, the below are ordered by bitreversed codeword and only
+     used entries are populated */
+  float        *valuelist;  /* list of dim*entries actual entry values */  
+  ogg_uint32_t *codelist;   /* list of bitstream codewords for each entry */
+
+  int          *dec_index;  /* only used if sparseness collapsed */
+  char         *dec_codelengths;
+  ogg_uint32_t *dec_firsttable;
+  int           dec_firsttablen;
+  int           dec_maxlength;
+
+} codebook;
+
+extern void vorbis_staticbook_clear(static_codebook *b);
+extern void vorbis_staticbook_destroy(static_codebook *b);
+extern int vorbis_book_init_encode(codebook *dest,const static_codebook *source);
+extern int vorbis_book_init_decode(codebook *dest,const static_codebook *source);
+extern void vorbis_book_clear(codebook *b);
+
+extern float *_book_unquantize(const static_codebook *b,int n,int *map);
+extern float *_book_logdist(const static_codebook *b,float *vals);
+extern float _float32_unpack(long val);
+extern long   _float32_pack(float val);
+extern int  _best(codebook *book, float *a, int step);
+extern int _ilog(unsigned int v);
+extern long _book_maptype1_quantvals(const static_codebook *b);
+
+extern int vorbis_book_besterror(codebook *book,float *a,int step,int addmul);
+extern long vorbis_book_codeword(codebook *book,int entry);
+extern long vorbis_book_codelen(codebook *book,int entry);
+
+
+
+extern int vorbis_staticbook_pack(const static_codebook *c,oggpack_buffer *b);
+extern int vorbis_staticbook_unpack(oggpack_buffer *b,static_codebook *c);
+
+extern int vorbis_book_encode(codebook *book, int a, oggpack_buffer *b);
+extern int vorbis_book_errorv(codebook *book, float *a);
+extern int vorbis_book_encodev(codebook *book, int best,float *a, 
+			       oggpack_buffer *b);
+
+extern long vorbis_book_decode(codebook *book, oggpack_buffer *b);
+extern long vorbis_book_decodevs_add(codebook *book, float *a, 
+				     oggpack_buffer *b,int n);
+extern long vorbis_book_decodev_set(codebook *book, float *a, 
+				    oggpack_buffer *b,int n);
+extern long vorbis_book_decodev_add(codebook *book, float *a, 
+				    oggpack_buffer *b,int n);
+extern long vorbis_book_decodevv_add(codebook *book, float **a,
+				     long off,int ch, 
+				    oggpack_buffer *b,int n);
+
+
+
+#endif