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Diffstat (limited to 'src/main/jni/opus/celt/entcode.c')
-rw-r--r-- | src/main/jni/opus/celt/entcode.c | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/src/main/jni/opus/celt/entcode.c b/src/main/jni/opus/celt/entcode.c deleted file mode 100644 index fa5d7c7c2..000000000 --- a/src/main/jni/opus/celt/entcode.c +++ /dev/null @@ -1,93 +0,0 @@ -/* Copyright (c) 2001-2011 Timothy B. Terriberry -*/ -/* - 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. -*/ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "entcode.h" -#include "arch.h" - -#if !defined(EC_CLZ) -/*This is a fallback for systems where we don't know how to access - a BSR or CLZ instruction (see ecintrin.h). - If you are optimizing Opus on a new platform and it has a native CLZ or - BZR (e.g. cell, MIPS, x86, etc) then making it available to Opus will be - an easy performance win.*/ -int ec_ilog(opus_uint32 _v){ - /*On a Pentium M, this branchless version tested as the fastest on - 1,000,000,000 random 32-bit integers, edging out a similar version with - branches, and a 256-entry LUT version.*/ - int ret; - int m; - ret=!!_v; - m=!!(_v&0xFFFF0000)<<4; - _v>>=m; - ret|=m; - m=!!(_v&0xFF00)<<3; - _v>>=m; - ret|=m; - m=!!(_v&0xF0)<<2; - _v>>=m; - ret|=m; - m=!!(_v&0xC)<<1; - _v>>=m; - ret|=m; - ret+=!!(_v&0x2); - return ret; -} -#endif - -opus_uint32 ec_tell_frac(ec_ctx *_this){ - opus_uint32 nbits; - opus_uint32 r; - int l; - int i; - /*To handle the non-integral number of bits still left in the encoder/decoder - state, we compute the worst-case number of bits of val that must be - encoded to ensure that the value is inside the range for any possible - subsequent bits. - The computation here is independent of val itself (the decoder does not - even track that value), even though the real number of bits used after - ec_enc_done() may be 1 smaller if rng is a power of two and the - corresponding trailing bits of val are all zeros. - If we did try to track that special case, then coding a value with a - probability of 1/(1<<n) might sometimes appear to use more than n bits. - This may help explain the surprising result that a newly initialized - encoder or decoder claims to have used 1 bit.*/ - nbits=_this->nbits_total<<BITRES; - l=EC_ILOG(_this->rng); - r=_this->rng>>(l-16); - for(i=BITRES;i-->0;){ - int b; - r=r*r>>15; - b=(int)(r>>16); - l=l<<1|b; - r>>=b; - } - return nbits-l; -} |