|
Packit |
664db3 |
#ifdef HAVE_CONFIG_H
|
|
Packit |
664db3 |
#include "config.h"
|
|
Packit |
664db3 |
#endif
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
#include <stddef.h>
|
|
Packit |
664db3 |
#include "entdec.h"
|
|
Packit |
664db3 |
#include "os_support.h"
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
void ec_byte_readinit(ec_byte_buffer *_b,unsigned char *_buf,long _bytes){
|
|
Packit |
664db3 |
_b->buf=_b->ptr=_buf;
|
|
Packit |
664db3 |
_b->storage=_bytes;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
int ec_byte_look1(ec_byte_buffer *_b){
|
|
Packit |
664db3 |
ptrdiff_t endbyte;
|
|
Packit |
664db3 |
endbyte=_b->ptr-_b->buf;
|
|
Packit |
664db3 |
if(endbyte>=_b->storage)return -1;
|
|
Packit |
664db3 |
else return _b->ptr[0];
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
int ec_byte_look4(ec_byte_buffer *_b,ec_uint32 *_val){
|
|
Packit |
664db3 |
ptrdiff_t endbyte;
|
|
Packit |
664db3 |
endbyte=_b->ptr-_b->buf;
|
|
Packit |
664db3 |
if(endbyte+4>_b->storage){
|
|
Packit |
664db3 |
if(endbyte<_b->storage){
|
|
Packit |
664db3 |
*_val=_b->ptr[0];
|
|
Packit |
664db3 |
endbyte++;
|
|
Packit |
664db3 |
if(endbyte<_b->storage){
|
|
Packit |
664db3 |
*_val|=(ec_uint32)_b->ptr[1]<<8;
|
|
Packit |
664db3 |
endbyte++;
|
|
Packit |
664db3 |
if(endbyte<_b->storage)*_val|=(ec_uint32)_b->ptr[2]<<16;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
return -1;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
else{
|
|
Packit |
664db3 |
*_val=_b->ptr[0];
|
|
Packit |
664db3 |
*_val|=(ec_uint32)_b->ptr[1]<<8;
|
|
Packit |
664db3 |
*_val|=(ec_uint32)_b->ptr[2]<<16;
|
|
Packit |
664db3 |
*_val|=(ec_uint32)_b->ptr[3]<<24;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
return 0;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
void ec_byte_adv1(ec_byte_buffer *_b){
|
|
Packit |
664db3 |
_b->ptr++;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
void ec_byte_adv4(ec_byte_buffer *_b){
|
|
Packit |
664db3 |
_b->ptr+=4;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
int ec_byte_read1(ec_byte_buffer *_b){
|
|
Packit |
664db3 |
ptrdiff_t endbyte;
|
|
Packit |
664db3 |
endbyte=_b->ptr-_b->buf;
|
|
Packit |
664db3 |
if(endbyte>=_b->storage)return -1;
|
|
Packit |
664db3 |
else return *(_b->ptr++);
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
int ec_byte_read4(ec_byte_buffer *_b,ec_uint32 *_val){
|
|
Packit |
664db3 |
unsigned char *end;
|
|
Packit |
664db3 |
end=_b->buf+_b->storage;
|
|
Packit |
664db3 |
if(_b->ptr+4>end){
|
|
Packit |
664db3 |
if(_b->ptr
|
|
Packit |
664db3 |
*_val=*(_b->ptr++);
|
|
Packit |
664db3 |
if(_b->ptr
|
|
Packit |
664db3 |
*_val|=(ec_uint32)*(_b->ptr++)<<8;
|
|
Packit |
664db3 |
if(_b->ptr<end)*_val|=(ec_uint32)*(_b->ptr++)<<16;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
return -1;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
else{
|
|
Packit |
664db3 |
*_val=(*_b->ptr++);
|
|
Packit |
664db3 |
*_val|=(ec_uint32)*(_b->ptr++)<<8;
|
|
Packit |
664db3 |
*_val|=(ec_uint32)*(_b->ptr++)<<16;
|
|
Packit |
664db3 |
*_val|=(ec_uint32)*(_b->ptr++)<<24;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
return 0;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
ec_uint32 ec_dec_bits(ec_dec *_this,int _ftb){
|
|
Packit |
664db3 |
ec_uint32 t;
|
|
Packit |
664db3 |
unsigned s;
|
|
Packit |
664db3 |
unsigned ft;
|
|
Packit |
664db3 |
t=0;
|
|
Packit |
664db3 |
while(_ftb>EC_UNIT_BITS){
|
|
Packit |
664db3 |
s=ec_decode_bin(_this,EC_UNIT_BITS);
|
|
Packit |
664db3 |
ec_dec_update(_this,s,s+1,EC_UNIT_MASK+1);
|
|
Packit |
664db3 |
t=t<
|
|
Packit |
664db3 |
_ftb-=EC_UNIT_BITS;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
ft=1U<<_ftb;
|
|
Packit |
664db3 |
s=ec_decode_bin(_this,_ftb);
|
|
Packit |
664db3 |
ec_dec_update(_this,s,s+1,ft);
|
|
Packit |
664db3 |
t=t<<_ftb|s;
|
|
Packit |
664db3 |
return t;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
ec_uint32 ec_dec_uint(ec_dec *_this,ec_uint32 _ft){
|
|
Packit |
664db3 |
ec_uint32 t;
|
|
Packit |
664db3 |
unsigned ft;
|
|
Packit |
664db3 |
unsigned s;
|
|
Packit |
664db3 |
int ftb;
|
|
Packit |
664db3 |
t=0;
|
|
Packit |
664db3 |
_ft--;
|
|
Packit |
664db3 |
ftb=EC_ILOG(_ft);
|
|
Packit |
664db3 |
if(ftb>EC_UNIT_BITS){
|
|
Packit |
664db3 |
ftb-=EC_UNIT_BITS;
|
|
Packit |
664db3 |
ft=(unsigned)(_ft>>ftb)+1;
|
|
Packit |
664db3 |
s=ec_decode(_this,ft);
|
|
Packit |
664db3 |
ec_dec_update(_this,s,s+1,ft);
|
|
Packit |
664db3 |
t=t<
|
|
Packit |
664db3 |
t = t<
|
|
Packit |
664db3 |
if (t>_ft)
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
celt_notify("uint decode error");
|
|
Packit |
664db3 |
t = _ft;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
return t;
|
|
Packit |
664db3 |
} else {
|
|
Packit |
664db3 |
_ft++;
|
|
Packit |
664db3 |
s=ec_decode(_this,(unsigned)_ft);
|
|
Packit |
664db3 |
ec_dec_update(_this,s,s+1,(unsigned)_ft);
|
|
Packit |
664db3 |
t=t<
|
|
Packit |
664db3 |
return t;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
}
|