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Diffstat (limited to 'thirdparty/opus/celt/entcode.h')
| -rw-r--r-- | thirdparty/opus/celt/entcode.h | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/thirdparty/opus/celt/entcode.h b/thirdparty/opus/celt/entcode.h deleted file mode 100644 index 13d6c84ef0..0000000000 --- a/thirdparty/opus/celt/entcode.h +++ /dev/null @@ -1,152 +0,0 @@ -/* 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. -*/ - -#include "opus_types.h" -#include "opus_defines.h" - -#if !defined(_entcode_H) -# define _entcode_H (1) -# include <limits.h> -# include <stddef.h> -# include "ecintrin.h" - -extern const opus_uint32 SMALL_DIV_TABLE[129]; - -#ifdef OPUS_ARM_ASM -#define USE_SMALL_DIV_TABLE -#endif - -/*OPT: ec_window must be at least 32 bits, but if you have fast arithmetic on a - larger type, you can speed up the decoder by using it here.*/ -typedef opus_uint32 ec_window; -typedef struct ec_ctx ec_ctx; -typedef struct ec_ctx ec_enc; -typedef struct ec_ctx ec_dec; - -# 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) - -/*The resolution of fractional-precision bit usage measurements, i.e., - 3 => 1/8th bits.*/ -# define BITRES 3 - -/*The entropy encoder/decoder context. - We use the same structure for both, so that common functions like ec_tell() - can be used on either one.*/ -struct ec_ctx{ - /*Buffered input/output.*/ - unsigned char *buf; - /*The size of the buffer.*/ - opus_uint32 storage; - /*The offset at which the last byte containing raw bits was read/written.*/ - opus_uint32 end_offs; - /*Bits that will be read from/written at the end.*/ - ec_window end_window; - /*Number of valid bits in end_window.*/ - int nend_bits; - /*The total number of whole bits read/written. - This does not include partial bits currently in the range coder.*/ - int nbits_total; - /*The offset at which the next range coder byte will be read/written.*/ - opus_uint32 offs; - /*The number of values in the current range.*/ - opus_uint32 rng; - /*In the decoder: the difference between the top of the current range and - the input value, minus one. - In the encoder: the low end of the current range.*/ - opus_uint32 val; - /*In the decoder: the saved normalization factor from ec_decode(). - In the encoder: the number of oustanding carry propagating symbols.*/ - opus_uint32 ext; - /*A buffered input/output symbol, awaiting carry propagation.*/ - int rem; - /*Nonzero if an error occurred.*/ - int error; -}; - -static OPUS_INLINE opus_uint32 ec_range_bytes(ec_ctx *_this){ - return _this->offs; -} - -static OPUS_INLINE unsigned char *ec_get_buffer(ec_ctx *_this){ - return _this->buf; -} - -static OPUS_INLINE int ec_get_error(ec_ctx *_this){ - return _this->error; -} - -/*Returns the number of bits "used" by the encoded or decoded symbols so far. - This same number can be computed in either the encoder or the decoder, and is - suitable for making coding decisions. - Return: The number of bits. - This will always be slightly larger than the exact value (e.g., all - rounding error is in the positive direction).*/ -static OPUS_INLINE int ec_tell(ec_ctx *_this){ - return _this->nbits_total-EC_ILOG(_this->rng); -} - -/*Returns the number of bits "used" by the encoded or decoded symbols so far. - This same number can be computed in either the encoder or the decoder, and is - suitable for making coding decisions. - Return: The number of bits scaled by 2**BITRES. - This will always be slightly larger than the exact value (e.g., all - rounding error is in the positive direction).*/ -opus_uint32 ec_tell_frac(ec_ctx *_this); - -/* Tested exhaustively for all n and for 1<=d<=256 */ -static OPUS_INLINE opus_uint32 celt_udiv(opus_uint32 n, opus_uint32 d) { - celt_assert(d>0); -#ifdef USE_SMALL_DIV_TABLE - if (d>256) - return n/d; - else { - opus_uint32 t, q; - t = EC_ILOG(d&-d); - q = (opus_uint64)SMALL_DIV_TABLE[d>>t]*(n>>(t-1))>>32; - return q+(n-q*d >= d); - } -#else - return n/d; -#endif -} - -static OPUS_INLINE opus_int32 celt_sudiv(opus_int32 n, opus_int32 d) { - celt_assert(d>0); -#ifdef USE_SMALL_DIV_TABLE - if (n<0) - return -(opus_int32)celt_udiv(-n, d); - else - return celt_udiv(n, d); -#else - return n/d; -#endif -} - -#endif |