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/*
* V4L2 Codec decoding example application
* Kamil Debski <k.debski@samsung.com>
*
* File operations
*
* Copyright 2012 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "common.h"
#include "fileops.h"
int input_open(struct instance *i, char *name)
{
struct stat in_stat;
i->in.fd = open(name, O_RDONLY);
if (!i->in.fd) {
err("Failed to open file: %s", i->in.name);
return -1;
}
fstat(i->in.fd, &in_stat);
i->in.size = in_stat.st_size;
i->in.offs = 0;
i->in.p = mmap(0, i->in.size, PROT_READ, MAP_SHARED, i->in.fd, 0);
if (i->in.p == MAP_FAILED) {
err("Failed to map input file");
return -1;
}
return 0;
}
void input_close(struct instance *i)
{
munmap(i->in.p, i->in.size);
close(i->in.fd);
}
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