diff options
Diffstat (limited to 'pjmedia/src/pjmedia-codec/speex/math_approx.h')
-rw-r--r-- | pjmedia/src/pjmedia-codec/speex/math_approx.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia-codec/speex/math_approx.h b/pjmedia/src/pjmedia-codec/speex/math_approx.h new file mode 100644 index 00000000..377bf1ac --- /dev/null +++ b/pjmedia/src/pjmedia-codec/speex/math_approx.h @@ -0,0 +1,50 @@ +/* Copyright (C) 2002 Jean-Marc Valin */ +/** + @file math_approx.h + @brief Various math approximation functions for Speex +*/ +/* + 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. + + - Neither the name of the Xiph.org Foundation nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + + 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 FOUNDATION 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. +*/ + +#ifndef MATH_APPROX_H +#define MATH_APPROX_H + +#include "misc.h" + +spx_word16_t spx_cos(spx_word16_t x); + +#ifdef FIXED_POINT +spx_word16_t spx_sqrt(spx_word32_t x); +spx_word16_t spx_acos(spx_word16_t x); +#else +#define spx_sqrt sqrt +#define spx_acos acos +#endif + +#endif |