PeerStreamer

/*

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

/**

 * @file libavutil/libm.h

 * Replacements for frequently missing libm functions

 */

#ifndef AVUTIL_LIBM_H

#define AVUTIL_LIBM_H

#include <math.h>

#include "config.h"

#if !HAVE_EXP2

#undef exp2

#define exp2(x) exp((x) * 0.693147180559945)

#endif /* HAVE_EXP2 */

#if !HAVE_EXP2F

#undef exp2f

#define exp2f(x) ((float)exp2(x))

#endif /* HAVE_EXP2F */

#if !HAVE_LLRINT

#undef llrint

#define llrint(x) ((long long)rint(x))

#endif /* HAVE_LLRINT */

#if !HAVE_LOG2

#undef log2

#define log2(x) (log(x) * 1.44269504088896340736)

#endif /* HAVE_LOG2 */

#if !HAVE_LOG2F

#undef log2f

#define log2f(x) ((float)log2(x))

#endif /* HAVE_LOG2F */

#if !HAVE_LRINT

static av_always_inline av_const long int lrint(double x)

{

    return rint(x);

}

#endif /* HAVE_LRINT */

#if !HAVE_LRINTF

static av_always_inline av_const long int lrintf(float x)

{

    return (int)(rint(x));

}

#endif /* HAVE_LRINTF */

#if !HAVE_ROUND

static av_always_inline av_const double round(double x)

{

    return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);

}

#endif /* HAVE_ROUND */

#if !HAVE_ROUNDF

static av_always_inline av_const float roundf(float x)

{

    return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);

}

#endif /* HAVE_ROUNDF */

#if !HAVE_TRUNCF

static av_always_inline av_const float truncf(float x)

{

    return (x > 0) ? floor(x) : ceil(x);

}

#endif /* HAVE_TRUNCF */

#endif /* AVUTIL_LIBM_H */