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author/dev/humancontroller <devhc@example.com>2015-03-28 01:21:52 +0100
committer/dev/humancontroller <devhc@example.com>2017-01-26 07:16:57 +0100
commite9d273f7b0544b03e4d73e1078b2755fef0e05f7 (patch)
tree4fa9863c0a41a444a0afc145411480ced8e4351d /src/opus-1.1/celt/entenc.h
parentf45fbef604e05144057dec8d1dbfc5d4f5a2a822 (diff)
remove most libraries from the source tree
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diff --git a/src/opus-1.1/celt/entenc.h b/src/opus-1.1/celt/entenc.h
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-/* Copyright (c) 2001-2011 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.
-
- 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 COPYRIGHT OWNER
- 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.
-*/
-
-#if !defined(_entenc_H)
-# define _entenc_H (1)
-# include <stddef.h>
-# include "entcode.h"
-
-/*Initializes the encoder.
- _buf: The buffer to store output bytes in.
- _size: The size of the buffer, in chars.*/
-void ec_enc_init(ec_enc *_this,unsigned char *_buf,opus_uint32 _size);
-/*Encodes a symbol given its frequency information.
- The frequency information must be discernable by the decoder, assuming it
- has read only the previous symbols from the stream.
- It is allowable to change the frequency information, or even the entire
- source alphabet, so long as the decoder can tell from the context of the
- previously encoded information that it is supposed to do so as well.
- _fl: The cumulative frequency of all symbols that come before the one to be
- encoded.
- _fh: The cumulative frequency of all symbols up to and including the one to
- be encoded.
- Together with _fl, this defines the range [_fl,_fh) in which the
- decoded value will fall.
- _ft: The sum of the frequencies of all the symbols*/
-void ec_encode(ec_enc *_this,unsigned _fl,unsigned _fh,unsigned _ft);
-
-/*Equivalent to ec_encode() with _ft==1<<_bits.*/
-void ec_encode_bin(ec_enc *_this,unsigned _fl,unsigned _fh,unsigned _bits);
-
-/* Encode a bit that has a 1/(1<<_logp) probability of being a one */
-void ec_enc_bit_logp(ec_enc *_this,int _val,unsigned _logp);
-
-/*Encodes a symbol given an "inverse" CDF table.
- _s: The index of the symbol to encode.
- _icdf: The "inverse" CDF, such that symbol _s falls in the range
- [_s>0?ft-_icdf[_s-1]:0,ft-_icdf[_s]), where ft=1<<_ftb.
- The values must be monotonically non-increasing, and the last value
- must be 0.
- _ftb: The number of bits of precision in the cumulative distribution.*/
-void ec_enc_icdf(ec_enc *_this,int _s,const unsigned char *_icdf,unsigned _ftb);
-
-/*Encodes a raw unsigned integer in the stream.
- _fl: The integer to encode.
- _ft: The number of integers that can be encoded (one more than the max).
- This must be at least one, and no more than 2**32-1.*/
-void ec_enc_uint(ec_enc *_this,opus_uint32 _fl,opus_uint32 _ft);
-
-/*Encodes a sequence of raw bits in the stream.
- _fl: The bits to encode.
- _ftb: The number of bits to encode.
- This must be between 1 and 25, inclusive.*/
-void ec_enc_bits(ec_enc *_this,opus_uint32 _fl,unsigned _ftb);
-
-/*Overwrites a few bits at the very start of an existing stream, after they
- have already been encoded.
- This makes it possible to have a few flags up front, where it is easy for
- decoders to access them without parsing the whole stream, even if their
- values are not determined until late in the encoding process, without having
- to buffer all the intermediate symbols in the encoder.
- In order for this to work, at least _nbits bits must have already been
- encoded using probabilities that are an exact power of two.
- The encoder can verify the number of encoded bits is sufficient, but cannot
- check this latter condition.
- _val: The bits to encode (in the least _nbits significant bits).
- They will be decoded in order from most-significant to least.
- _nbits: The number of bits to overwrite.
- This must be no more than 8.*/
-void ec_enc_patch_initial_bits(ec_enc *_this,unsigned _val,unsigned _nbits);
-
-/*Compacts the data to fit in the target size.
- This moves up the raw bits at the end of the current buffer so they are at
- the end of the new buffer size.
- The caller must ensure that the amount of data that's already been written
- will fit in the new size.
- _size: The number of bytes in the new buffer.
- This must be large enough to contain the bits already written, and
- must be no larger than the existing size.*/
-void ec_enc_shrink(ec_enc *_this,opus_uint32 _size);
-
-/*Indicates that there are no more symbols to encode.
- All reamining output bytes are flushed to the output buffer.
- ec_enc_init() must be called before the encoder can be used again.*/
-void ec_enc_done(ec_enc *_this);
-
-#endif