1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libavcodec/utils.c	Tue Sep 25 15:55:33 2012 +0200
     1.3 @@ -0,0 +1,68 @@
     1.4 +/*
     1.5 + * utils for libavcodec
     1.6 + * Copyright (c) 2001 Fabrice Bellard
     1.7 + * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
     1.8 + *
     1.9 + * This file is part of FFmpeg.
    1.10 + *
    1.11 + * FFmpeg is free software; you can redistribute it and/or
    1.12 + * modify it under the terms of the GNU Lesser General Public
    1.13 + * License as published by the Free Software Foundation; either
    1.14 + * version 2.1 of the License, or (at your option) any later version.
    1.15 + *
    1.16 + * FFmpeg is distributed in the hope that it will be useful,
    1.17 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.18 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    1.19 + * Lesser General Public License for more details.
    1.20 + *
    1.21 + * You should have received a copy of the GNU Lesser General Public
    1.22 + * License along with FFmpeg; if not, write to the Free Software
    1.23 + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
    1.24 + */
    1.25 +
    1.26 +/**
    1.27 + * @file
    1.28 + * utils.
    1.29 + */
    1.30 +
    1.31 +/* needed for mkstemp() */
    1.32 +#define _XOPEN_SOURCE 600
    1.33 +
    1.34 +#include "avcodec.h"
    1.35 +#include "dsputil.h"
    1.36 +
    1.37 +#include <stdlib.h>
    1.38 +#include <stdarg.h>
    1.39 +#include <limits.h>
    1.40 +#include <float.h>
    1.41 +//#undef NDEBUG
    1.42 +#include <assert.h>
    1.43 +
    1.44 +#include <fcntl.h>
    1.45 +
    1.46 +void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
    1.47 +{
    1.48 +    if(min_size < *size)
    1.49 +        return ptr;
    1.50 +
    1.51 +    *size= FFMAX(17*min_size/16 + 32, min_size);
    1.52 +
    1.53 +    ptr= av_realloc(ptr, *size);
    1.54 +    if(!ptr) //we could set this to the unmodified min_size but this is safer if the user lost the ptr and uses NULL now
    1.55 +        *size= 0;
    1.56 +
    1.57 +    return ptr;
    1.58 +}
    1.59 +
    1.60 +void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
    1.61 +{
    1.62 +    void **p = ptr;
    1.63 +    if (min_size < *size)
    1.64 +        return;
    1.65 +    *size= FFMAX(17*min_size/16 + 32, min_size);
    1.66 +    av_free(*p);
    1.67 +    *p = av_malloc(*size);
    1.68 +    if (!*p) *size = 0;
    1.69 +}
    1.70 +
    1.71 +