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/*
* Wrappers for zlib
* Copyright (C) 2022 Andreas Rheinhardt
*
* 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
*/
#include <zlib.h>
#include "config.h"
#include "libavutil/error.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "zlib_wrapper.h"
static void *alloc_wrapper(void *opaque, uInt items, uInt size)
{
return av_malloc_array(items, size);
}
static void free_wrapper(void *opaque, void *ptr)
{
av_free(ptr);
}
#if CONFIG_INFLATE_WRAPPER
int ff_inflate_init(FFZStream *z, void *logctx)
{
z_stream *const zstream = &z->zstream;
int zret;
z->inited = 0;
zstream->next_in = Z_NULL;
zstream->avail_in = 0;
zstream->zalloc = alloc_wrapper;
zstream->zfree = free_wrapper;
zstream->opaque = Z_NULL;
zret = inflateInit(zstream);
if (zret == Z_OK) {
z->inited = 1;
} else {
av_log(logctx, AV_LOG_ERROR, "inflateInit error %d, message: %s\n",
zret, zstream->msg ? zstream->msg : "");
return AVERROR_EXTERNAL;
}
return 0;
}
void ff_inflate_end(FFZStream *z)
{
if (z->inited) {
z->inited = 0;
inflateEnd(&z->zstream);
}
}
#endif
#if CONFIG_DEFLATE_WRAPPER
int ff_deflate_init(FFZStream *z, int level, void *logctx)
{
z_stream *const zstream = &z->zstream;
int zret;
z->inited = 0;
zstream->zalloc = alloc_wrapper;
zstream->zfree = free_wrapper;
zstream->opaque = Z_NULL;
zret = deflateInit(zstream, level);
if (zret == Z_OK) {
z->inited = 1;
} else {
av_log(logctx, AV_LOG_ERROR, "deflateInit error %d, message: %s\n",
zret, zstream->msg ? zstream->msg : "");
return AVERROR_EXTERNAL;
}
return 0;
}
void ff_deflate_end(FFZStream *z)
{
if (z->inited) {
z->inited = 0;
deflateEnd(&z->zstream);
}
}
#endif
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