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Viewing changes to daemon/libs/pjproject-2.0.1/third_party/ilbc/packing.c

  • Committer: Package Import Robot
  • Author(s): Mark Purcell
  • Date: 2014-01-28 18:23:36 UTC
  • mfrom: (1.1.11)
  • mto: This revision was merged to the branch mainline in revision 24.
  • Revision ID: package-import@ubuntu.com-20140128182336-3xenud1kbnwmf3mz
http://bugs.debian.org/735846
http://bugs.debian.org/727164
http://bugs.debian.org/718178
http://bugs.debian.org/736583
http://bugs.debian.org/722040
http://bugs.debian.org/736746
* New upstream release 
  - Fixes "New Upstream Release" (Closes: #735846)
  - Fixes "Ringtone does not stop" (Closes: #727164)
  - Fixes "[sflphone-kde] crash on startup" (Closes: #718178)
  - Fixes "sflphone GUI crashes when call is hung up" (Closes: #736583)
* Build-Depends: ensure GnuTLS 2.6
  - libucommon-dev (>= 6.0.7-1.1), libccrtp-dev (>= 2.0.6-3)
  - Fixes "FTBFS Build-Depends libgnutls{26,28}-dev" (Closes: #722040)
* Fix "boost 1.49 is going away" unversioned Build-Depends: (Closes: #736746)
* Add Build-Depends: libsndfile-dev, nepomuk-core-dev

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daemon/libs/pjproject-2.0.1/third_party/ilbc/packing.c
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   /******************************************************************
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4
 
       iLBC Speech Coder ANSI-C Source Code
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       packing.c
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       Copyright (C) The Internet Society (2004).
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       All Rights Reserved.
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11
 
   ******************************************************************/
12
 
 
13
 
   #include <math.h>
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   #include <stdlib.h>
15
 
 
16
 
   #include "iLBC_define.h"
17
 
   #include "constants.h"
18
 
   #include "helpfun.h"
19
 
   #include "string.h"
20
 
 
21
 
   /*----------------------------------------------------------------*
22
 
    *  splitting an integer into first most significant bits and
23
 
    *  remaining least significant bits
24
 
    *---------------------------------------------------------------*/
25
 
 
26
 
   void packsplit(
27
 
       int *index,                 /* (i) the value to split */
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       int *firstpart,             /* (o) the value specified by most
29
 
                                          significant bits */
30
 
       int *rest,                  /* (o) the value specified by least
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                                          significant bits */
32
 
 
33
 
 
34
 
 
35
 
 
36
 
 
37
 
       int bitno_firstpart,    /* (i) number of bits in most
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                                          significant part */
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       int bitno_total             /* (i) number of bits in full range
40
 
                                          of value */
41
 
   ){
42
 
       int bitno_rest = bitno_total-bitno_firstpart;
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44
 
       *firstpart = *index>>(bitno_rest);
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       *rest = *index-(*firstpart<<(bitno_rest));
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   }
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48
 
   /*----------------------------------------------------------------*
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    *  combining a value corresponding to msb's with a value
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    *  corresponding to lsb's
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    *---------------------------------------------------------------*/
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   void packcombine(
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       int *index,                 /* (i/o) the msb value in the
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                                          combined value out */
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       int rest,                   /* (i) the lsb value */
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       int bitno_rest              /* (i) the number of bits in the
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                                          lsb part */
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   ){
60
 
       *index = *index<<bitno_rest;
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       *index += rest;
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   }
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   /*----------------------------------------------------------------*
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    *  packing of bits into bitstream, i.e., vector of bytes
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    *---------------------------------------------------------------*/
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   void dopack(
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       unsigned char **bitstream,  /* (i/o) on entrance pointer to
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                                          place in bitstream to pack
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                                          new data, on exit pointer
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                                          to place in bitstream to
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                                          pack future data */
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       int index,                  /* (i) the value to pack */
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       int bitno,                  /* (i) the number of bits that the
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                                          value will fit within */
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       int *pos                /* (i/o) write position in the
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                                          current byte */
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   ){
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       int posLeft;
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       /* Clear the bits before starting in a new byte */
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       if ((*pos)==0) {
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           **bitstream=0;
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       }
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       while (bitno>0) {
94
 
 
95
 
           /* Jump to the next byte if end of this byte is reached*/
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97
 
           if (*pos==8) {
98
 
               *pos=0;
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               (*bitstream)++;
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               **bitstream=0;
101
 
           }
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           posLeft=8-(*pos);
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105
 
           /* Insert index into the bitstream */
106
 
 
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           if (bitno <= posLeft) {
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               **bitstream |= (unsigned char)(index<<(posLeft-bitno));
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               *pos+=bitno;
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               bitno=0;
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           } else {
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               **bitstream |= (unsigned char)(index>>(bitno-posLeft));
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               *pos=8;
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               index-=((index>>(bitno-posLeft))<<(bitno-posLeft));
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117
 
               bitno-=posLeft;
118
 
           }
119
 
       }
120
 
   }
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122
 
   /*----------------------------------------------------------------*
123
 
    *  unpacking of bits from bitstream, i.e., vector of bytes
124
 
    *---------------------------------------------------------------*/
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126
 
   void unpack(
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       unsigned char **bitstream,  /* (i/o) on entrance pointer to
128
 
                                          place in bitstream to
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                                          unpack new data from, on
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                                          exit pointer to place in
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                                          bitstream to unpack future
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                                          data from */
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       int *index,                 /* (o) resulting value */
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       int bitno,                  /* (i) number of bits used to
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                                          represent the value */
136
 
       int *pos                /* (i/o) read position in the
137
 
                                          current byte */
138
 
 
139
 
 
140
 
 
141
 
 
142
 
 
143
 
   ){
144
 
       int BitsLeft;
145
 
 
146
 
       *index=0;
147
 
 
148
 
       while (bitno>0) {
149
 
 
150
 
           /* move forward in bitstream when the end of the
151
 
              byte is reached */
152
 
 
153
 
           if (*pos==8) {
154
 
               *pos=0;
155
 
               (*bitstream)++;
156
 
           }
157
 
 
158
 
           BitsLeft=8-(*pos);
159
 
 
160
 
           /* Extract bits to index */
161
 
 
162
 
           if (BitsLeft>=bitno) {
163
 
               *index+=((((**bitstream)<<(*pos)) & 0xFF)>>(8-bitno));
164
 
 
165
 
               *pos+=bitno;
166
 
               bitno=0;
167
 
           } else {
168
 
 
169
 
               if ((8-bitno)>0) {
170
 
                   *index+=((((**bitstream)<<(*pos)) & 0xFF)>>
171
 
                       (8-bitno));
172
 
                   *pos=8;
173
 
               } else {
174
 
                   *index+=(((int)(((**bitstream)<<(*pos)) & 0xFF))<<
175
 
                       (bitno-8));
176
 
                   *pos=8;
177
 
               }
178
 
               bitno-=BitsLeft;
179
 
           }
180
 
       }
181
 
   }