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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);
}