| Benny Prijono | c585988 | 2006-07-31 15:25:14 +0000 | [diff] [blame] | 1 | |
| 2 | /****************************************************************** |
| 3 | |
| 4 | iLBC Speech Coder ANSI-C Source Code |
| 5 | |
| 6 | packing.h |
| 7 | |
| 8 | Copyright (C) The Internet Society (2004). |
| 9 | All Rights Reserved. |
| 10 | |
| 11 | ******************************************************************/ |
| 12 | |
| 13 | #ifndef __PACKING_H |
| 14 | #define __PACKING_H |
| 15 | |
| 16 | void packsplit( |
| 17 | int *index, /* (i) the value to split */ |
| 18 | int *firstpart, /* (o) the value specified by most |
| 19 | significant bits */ |
| 20 | int *rest, /* (o) the value specified by least |
| 21 | significant bits */ |
| 22 | int bitno_firstpart, /* (i) number of bits in most |
| 23 | significant part */ |
| 24 | int bitno_total /* (i) number of bits in full range |
| 25 | of value */ |
| 26 | ); |
| 27 | |
| 28 | void packcombine( |
| 29 | int *index, /* (i/o) the msb value in the |
| 30 | combined value out */ |
| 31 | int rest, /* (i) the lsb value */ |
| 32 | int bitno_rest /* (i) the number of bits in the |
| 33 | lsb part */ |
| 34 | ); |
| 35 | |
| 36 | void dopack( |
| 37 | unsigned char **bitstream, /* (i/o) on entrance pointer to |
| 38 | place in bitstream to pack |
| 39 | new data, on exit pointer |
| 40 | to place in bitstream to |
| 41 | pack future data */ |
| 42 | int index, /* (i) the value to pack */ |
| 43 | int bitno, /* (i) the number of bits that the |
| 44 | value will fit within */ |
| 45 | int *pos /* (i/o) write position in the |
| 46 | current byte */ |
| 47 | ); |
| 48 | |
| 49 | |
| 50 | |
| 51 | |
| 52 | |
| 53 | void unpack( |
| 54 | unsigned char **bitstream, /* (i/o) on entrance pointer to |
| 55 | place in bitstream to |
| 56 | unpack new data from, on |
| 57 | exit pointer to place in |
| 58 | bitstream to unpack future |
| 59 | data from */ |
| 60 | int *index, /* (o) resulting value */ |
| 61 | int bitno, /* (i) number of bits used to |
| 62 | represent the value */ |
| 63 | int *pos /* (i/o) read position in the |
| 64 | current byte */ |
| 65 | ); |
| 66 | |
| 67 | #endif |
| 68 | |