8fcde379ec
ec_byte_read() ec_byte_read_from_end() had different return types. ec_dec_bits() was storing its return value as int instead of ec_uint32, which will break if int is only 16 bits.
91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
/* Copyright (c) 2001-2008 Timothy B. Terriberry
|
|
Copyright (c) 2008-2009 Xiph.Org Foundation */
|
|
/*
|
|
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 <stddef.h>
|
|
# include "ecintrin.h"
|
|
|
|
|
|
|
|
typedef celt_int32 ec_int32;
|
|
typedef celt_uint32 ec_uint32;
|
|
typedef size_t ec_window;
|
|
typedef struct ec_byte_buffer ec_byte_buffer;
|
|
|
|
|
|
|
|
/*This must be at least 32 bits.*/
|
|
# define EC_WINDOW_SIZE ((int)sizeof(ec_window)*CHAR_BIT)
|
|
|
|
/*The number of bits to use for the range-coded part of unsigned integers.*/
|
|
# define EC_UINT_BITS (8)
|
|
|
|
|
|
|
|
/*Simple libogg1-style buffer.*/
|
|
struct ec_byte_buffer{
|
|
unsigned char *buf;
|
|
ec_uint32 offs;
|
|
ec_uint32 end_offs;
|
|
ec_uint32 storage;
|
|
};
|
|
|
|
/*Encoding functions.*/
|
|
void ec_byte_writeinit_buffer(ec_byte_buffer *_b, unsigned char *_buf, ec_uint32 _size);
|
|
void ec_byte_shrink(ec_byte_buffer *_b, ec_uint32 _size);
|
|
int ec_byte_write(ec_byte_buffer *_b,unsigned _value);
|
|
int ec_byte_write_at_end(ec_byte_buffer *_b,unsigned _value);
|
|
int ec_byte_write_done(ec_byte_buffer *_b,int _start_bits_available,
|
|
unsigned _end_byte,int _end_bits_used);
|
|
/*Decoding functions.*/
|
|
void ec_byte_readinit(ec_byte_buffer *_b,unsigned char *_buf,ec_uint32 _bytes);
|
|
int ec_byte_read(ec_byte_buffer *_b);
|
|
int ec_byte_read_from_end(ec_byte_buffer *_b);
|
|
/*Shared functions.*/
|
|
static inline void ec_byte_reset(ec_byte_buffer *_b){
|
|
_b->offs=_b->end_offs=0;
|
|
}
|
|
|
|
static inline ec_uint32 ec_byte_bytes(ec_byte_buffer *_b){
|
|
return _b->offs;
|
|
}
|
|
|
|
static inline unsigned char *ec_byte_get_buffer(ec_byte_buffer *_b){
|
|
return _b->buf;
|
|
}
|
|
|
|
int ec_ilog(ec_uint32 _v);
|
|
|
|
#endif
|