95 lines
3.3 KiB
C
Executable file
95 lines
3.3 KiB
C
Executable file
/* (C) 2001-2008 Timothy B. Terriberry
|
|
(C) 2008 Jean-Marc Valin */
|
|
/*
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
- Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
- Neither the name of the Xiph.org Foundation nor the names of its
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
|
|
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "celt_types.h"
|
|
|
|
#if !defined(_entcode_H)
|
|
# define _entcode_H (1)
|
|
# include <limits.h>
|
|
# include "ecintrin.h"
|
|
|
|
|
|
|
|
typedef celt_int32_t ec_int32;
|
|
typedef celt_uint32_t ec_uint32;
|
|
typedef celt_uint64_t ec_uint64;
|
|
typedef struct ec_byte_buffer ec_byte_buffer;
|
|
|
|
|
|
|
|
/*The number of bits to code at a time when coding bits directly.*/
|
|
# define EC_UNIT_BITS (8)
|
|
/*The mask for the given bits.*/
|
|
# define EC_UNIT_MASK ((1U<<EC_UNIT_BITS)-1)
|
|
|
|
|
|
|
|
/*Simple libogg1-style buffer.*/
|
|
struct ec_byte_buffer{
|
|
unsigned char *buf;
|
|
unsigned char *ptr;
|
|
long storage;
|
|
int resizable;
|
|
};
|
|
|
|
/*Encoding functions.*/
|
|
void ec_byte_writeinit_buffer(ec_byte_buffer *_b, unsigned char *_buf, long _size);
|
|
void ec_byte_writeinit(ec_byte_buffer *_b);
|
|
void ec_byte_writetrunc(ec_byte_buffer *_b,long _bytes);
|
|
void ec_byte_write1(ec_byte_buffer *_b,unsigned _value);
|
|
void ec_byte_write4(ec_byte_buffer *_b,ec_uint32 _value);
|
|
void ec_byte_writecopy(ec_byte_buffer *_b,void *_source,long _bytes);
|
|
void ec_byte_writeclear(ec_byte_buffer *_b);
|
|
/*Decoding functions.*/
|
|
void ec_byte_readinit(ec_byte_buffer *_b,unsigned char *_buf,long _bytes);
|
|
int ec_byte_look1(ec_byte_buffer *_b);
|
|
int ec_byte_look4(ec_byte_buffer *_b,ec_uint32 *_val);
|
|
void ec_byte_adv1(ec_byte_buffer *_b);
|
|
void ec_byte_adv4(ec_byte_buffer *_b);
|
|
int ec_byte_read1(ec_byte_buffer *_b);
|
|
int ec_byte_read4(ec_byte_buffer *_b,ec_uint32 *_val);
|
|
/*Shared functions.*/
|
|
static __inline void ec_byte_reset(ec_byte_buffer *_b){
|
|
_b->ptr=_b->buf;
|
|
}
|
|
|
|
static __inline long ec_byte_bytes(ec_byte_buffer *_b){
|
|
return _b->ptr-_b->buf;
|
|
}
|
|
|
|
static __inline unsigned char *ec_byte_get_buffer(ec_byte_buffer *_b){
|
|
return _b->buf;
|
|
}
|
|
|
|
int ec_ilog(ec_uint32 _v);
|
|
int ec_ilog64(ec_uint64 _v);
|
|
|
|
#endif
|