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/*
* V4L2 Codec decoding example application
* Kamil Debski <k.debski@samsung.com>
*
* Argument parser
*
* Copyright 2012 Samsung Electronics Co., Ltd.
* Copyright (c) 2015 Linaro 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 <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <linux/videodev2.h>
#include "common.h"
#include "parser.h"
void print_usage(char *name)
{
printf("Usage:\n");
printf("\t%s\n", name);
printf("\t-c <codec> - The codec of the encoded stream, "
"available codecs: mpeg4, h264\n");
printf("\t-d use dmabuf instead of mmap\n");
printf("\t-i <file> - Input file name\n");
printf("\t-m <device> - video decoder device (e.g. /dev/video0)\n");
printf("\t-w video width\n");
printf("\t-h video height\n");
printf("\t-f save frames on disk\n");
printf("\n");
}
int get_codec(char *str)
{
if (strncasecmp("mpeg4", str, 5) == 0) {
return V4L2_PIX_FMT_MPEG4;
} else if (strncasecmp("h264", str, 5) == 0) {
return V4L2_PIX_FMT_H264;
} else if (strncasecmp("h263", str, 5) == 0) {
return V4L2_PIX_FMT_H263;
} else if (strncasecmp("xvid", str, 5) == 0) {
return V4L2_PIX_FMT_XVID;
} else if (strncasecmp("mpeg2", str, 5) == 0) {
return V4L2_PIX_FMT_MPEG2;
} else if (strncasecmp("mpeg1", str, 5) == 0) {
return V4L2_PIX_FMT_MPEG1;
}
return 0;
}
int parse_args(struct instance *i, int argc, char **argv)
{
int c;
while ((c = getopt(argc, argv, "w:h:c:di:mf:")) != -1) {
switch (c) {
case 'c':
i->codec = get_codec(optarg);
break;
case 'd':
i->video.cap_use_dmabuf = 1;
break;
case 'i':
i->file_name = optarg;
break;
case 'm':
i->video.name = optarg;
break;
case 'w':
i->width = atoi(optarg);
break;
case 'h':
i->height = atoi(optarg);
break;
case 'f':
i->save_frames = 1;
i->save_path = optarg;
break;
default:
err("Bad argument");
return -1;
}
}
if (!i->file_name) {
err("The following arguments are required: -i -m -c");
return -1;
}
if (!i->codec) {
err("Unknown or not set codec (-c)");
return -1;
}
return 0;
}
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