diff options
Diffstat (limited to 'pjmedia/src/pjmedia-codec/ilbc/packing.c')
| -rw-r--r-- | pjmedia/src/pjmedia-codec/ilbc/packing.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/pjmedia/src/pjmedia-codec/ilbc/packing.c b/pjmedia/src/pjmedia-codec/ilbc/packing.c deleted file mode 100644 index b7496a48..00000000 --- a/pjmedia/src/pjmedia-codec/ilbc/packing.c +++ /dev/null @@ -1,182 +0,0 @@ - - /****************************************************************** - - iLBC Speech Coder ANSI-C Source Code - - packing.c - - Copyright (C) The Internet Society (2004). - All Rights Reserved. - - ******************************************************************/ - - #include <math.h> - #include <stdlib.h> - - #include "iLBC_define.h" - #include "constants.h" - #include "helpfun.h" - #include "string.h" - - /*----------------------------------------------------------------* - * splitting an integer into first most significant bits and - * remaining least significant bits - *---------------------------------------------------------------*/ - - void packsplit( - int *index, /* (i) the value to split */ - int *firstpart, /* (o) the value specified by most - significant bits */ - int *rest, /* (o) the value specified by least - significant bits */ - - - - - - int bitno_firstpart, /* (i) number of bits in most - significant part */ - int bitno_total /* (i) number of bits in full range - of value */ - ){ - int bitno_rest = bitno_total-bitno_firstpart; - - *firstpart = *index>>(bitno_rest); - *rest = *index-(*firstpart<<(bitno_rest)); - } - - /*----------------------------------------------------------------* - * combining a value corresponding to msb's with a value - * corresponding to lsb's - *---------------------------------------------------------------*/ - - void packcombine( - int *index, /* (i/o) the msb value in the - combined value out */ - int rest, /* (i) the lsb value */ - int bitno_rest /* (i) the number of bits in the - lsb part */ - ){ - *index = *index<<bitno_rest; - *index += rest; - } - - /*----------------------------------------------------------------* - * packing of bits into bitstream, i.e., vector of bytes - *---------------------------------------------------------------*/ - - void dopack( - unsigned char **bitstream, /* (i/o) on entrance pointer to - place in bitstream to pack - new data, on exit pointer - to place in bitstream to - pack future data */ - int index, /* (i) the value to pack */ - int bitno, /* (i) the number of bits that the - value will fit within */ - int *pos /* (i/o) write position in the - current byte */ - ){ - int posLeft; - - /* Clear the bits before starting in a new byte */ - - if ((*pos)==0) { - - - - - - **bitstream=0; - } - - while (bitno>0) { - - /* Jump to the next byte if end of this byte is reached*/ - - if (*pos==8) { - *pos=0; - (*bitstream)++; - **bitstream=0; - } - - posLeft=8-(*pos); - - /* Insert index into the bitstream */ - - if (bitno <= posLeft) { - **bitstream |= (unsigned char)(index<<(posLeft-bitno)); - *pos+=bitno; - bitno=0; - } else { - **bitstream |= (unsigned char)(index>>(bitno-posLeft)); - - *pos=8; - index-=((index>>(bitno-posLeft))<<(bitno-posLeft)); - - bitno-=posLeft; - } - } - } - - /*----------------------------------------------------------------* - * unpacking of bits from bitstream, i.e., vector of bytes - *---------------------------------------------------------------*/ - - void unpack( - unsigned char **bitstream, /* (i/o) on entrance pointer to - place in bitstream to - unpack new data from, on - exit pointer to place in - bitstream to unpack future - data from */ - int *index, /* (o) resulting value */ - int bitno, /* (i) number of bits used to - represent the value */ - int *pos /* (i/o) read position in the - current byte */ - - - - - - ){ - int BitsLeft; - - *index=0; - - while (bitno>0) { - - /* move forward in bitstream when the end of the - byte is reached */ - - if (*pos==8) { - *pos=0; - (*bitstream)++; - } - - BitsLeft=8-(*pos); - - /* Extract bits to index */ - - if (BitsLeft>=bitno) { - *index+=((((**bitstream)<<(*pos)) & 0xFF)>>(8-bitno)); - - *pos+=bitno; - bitno=0; - } else { - - if ((8-bitno)>0) { - *index+=((((**bitstream)<<(*pos)) & 0xFF)>> - (8-bitno)); - *pos=8; - } else { - *index+=(((int)(((**bitstream)<<(*pos)) & 0xFF))<< - (bitno-8)); - *pos=8; - } - bitno-=BitsLeft; - } - } - } - |