995dcb610c
Took the opportunity to undo the Godot changed made to the
opus source. The opus module should eventually be built in its
own environment to avoid polluting others with too many include
dirs and defines.
TODO: Fix the platform/ stuff for opus.
(cherry picked from commit d9a291f641)
speex module was only added while cherry-picking, as speex is removed
in the master branch but we don't want to break compatibility in 2.1.x.
Unbundling wasn't done as the module uses the internal speex_free,
so it would require some more work.
87 lines
3.5 KiB
C++
87 lines
3.5 KiB
C++
/* Copyright (c) 2003-2008 Timothy B. Terriberry
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Copyright (c) 2008 Xiph.Org Foundation */
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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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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 COPYRIGHT OWNER
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OR 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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/*Some common macros for potential platform-specific optimization.*/
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#include "opus_types.h"
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#include <math.h>
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#include <limits.h>
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#include "arch.h"
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#if !defined(_ecintrin_H)
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# define _ecintrin_H (1)
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/*Some specific platforms may have optimized intrinsic or OPUS_INLINE assembly
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versions of these functions which can substantially improve performance.
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We define macros for them to allow easy incorporation of these non-ANSI
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features.*/
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/*Modern gcc (4.x) can compile the naive versions of min and max with cmov if
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given an appropriate architecture, but the branchless bit-twiddling versions
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are just as fast, and do not require any special target architecture.
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Earlier gcc versions (3.x) compiled both code to the same assembly
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instructions, because of the way they represented ((_b)>(_a)) internally.*/
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# define EC_MINI(_a,_b) ((_a)+(((_b)-(_a))&-((_b)<(_a))))
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/*Count leading zeros.
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This macro should only be used for implementing ec_ilog(), if it is defined.
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All other code should use EC_ILOG() instead.*/
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#if defined(_MSC_VER) && (_MSC_VER >= 1400)
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# include <intrin.h>
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/*In _DEBUG mode this is not an intrinsic by default.*/
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# pragma intrinsic(_BitScanReverse)
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static __inline int ec_bsr(unsigned long _x){
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unsigned long ret;
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_BitScanReverse(&ret,_x);
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return (int)ret;
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}
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# define EC_CLZ0 (1)
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# define EC_CLZ(_x) (-ec_bsr(_x))
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#elif defined(ENABLE_TI_DSPLIB)
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# include "dsplib.h"
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# define EC_CLZ0 (31)
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# define EC_CLZ(_x) (_lnorm(_x))
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#elif __GNUC_PREREQ(3,4)
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# if INT_MAX>=2147483647
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# define EC_CLZ0 ((int)sizeof(unsigned)*CHAR_BIT)
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# define EC_CLZ(_x) (__builtin_clz(_x))
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# elif LONG_MAX>=2147483647L
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# define EC_CLZ0 ((int)sizeof(unsigned long)*CHAR_BIT)
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# define EC_CLZ(_x) (__builtin_clzl(_x))
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# endif
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#endif
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#if defined(EC_CLZ)
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/*Note that __builtin_clz is not defined when _x==0, according to the gcc
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documentation (and that of the BSR instruction that implements it on x86).
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The majority of the time we can never pass it zero.
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When we need to, it can be special cased.*/
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# define EC_ILOG(_x) (EC_CLZ0-EC_CLZ(_x))
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#else
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int ec_ilog(opus_uint32 _v);
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# define EC_ILOG(_x) (ec_ilog(_x))
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#endif
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#endif
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