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