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2 /******************************************************************
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3
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4 iLBC Speech Coder ANSI-C Source Code
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5
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6 packing.h
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7
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8 Copyright (C) The Internet Society (2004).
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9 All Rights Reserved.
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10
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11 ******************************************************************/
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12
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13 #ifndef __PACKING_H
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14 #define __PACKING_H
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15
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16 void packsplit(int *index, /* (i) the value to split */
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17 int *firstpart, /* (o) the value specified by most
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18 significant bits */
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19 int *rest, /* (o) the value specified by least
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20 significant bits */
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21 int bitno_firstpart, /* (i) number of bits in most
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22 significant part */
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23 int bitno_total /* (i) number of bits in full range
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24 of value */
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25 );
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26
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27 void packcombine(int *index, /* (i/o) the msb value in the
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28 combined value out */
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29 int rest, /* (i) the lsb value */
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30 int bitno_rest /* (i) the number of bits in the
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31 lsb part */
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32 );
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33
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34 void dopack(unsigned char **bitstream, /* (i/o) on entrance pointer to
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35 place in bitstream to pack
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36 new data, on exit pointer
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37 to place in bitstream to
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38 pack future data */
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39 int index, /* (i) the value to pack */
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40 int bitno, /* (i) the number of bits that the
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41 value will fit within */
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42 int *pos /* (i/o) write position in the
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43 current byte */
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44 );
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45
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46
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47
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48
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49
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50 void unpack(unsigned char **bitstream, /* (i/o) on entrance pointer to
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51 place in bitstream to
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52 unpack new data from, on
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53 exit pointer to place in
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54 bitstream to unpack future
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55 data from */
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56 int *index, /* (o) resulting value */
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57 int bitno, /* (i) number of bits used to
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58 represent the value */
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59 int *pos /* (i/o) read position in the
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60 current byte */
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61 );
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62
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63 #endif
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