/*
?*?V4L2?Codec?decoding?example?application
?*?Kamil?Debski?
?*
?*?Argument?parser
?*
?*?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?
#include?
#include?
#include?

#include?“common.h“
#include?“parser.h“


void?print_usage（char?*name）
{
	//?“d:f:i:m:c:V“
	printf（“Usage:\n“）;
	printf（“\t./%s\n“?name）;
	printf（“\t-c??-?The?codec?of?the?encoded?stream\n“）;
	printf（“\t\t?????Available?codecs:?mpeg4?h264\n“）;
	printf（“\t-d???-?frame?buffer?device?（e.g.?/dev/fb0）\n“）;
	printf（“\t-f??-?FIMC?device?（e.g.?/dev/video4）\n“）;
	printf（“\t-i??-?Input?file?name\n“）;
	printf（“\t-m??-?MFC?device?（e.g.?/dev/video8）\n“）;
	printf（“\t-V?-?synchronise?to?vsync\n“）;
	//printf（“\t-??-?\n“）;
	printf（“\tp2\n“）;
	printf（“\n“）;
}

void?init_to_defaults（struct?instance?*i）
{
	memset（i?0?sizeof（*i））;
}

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;

	init_to_defaults（i）;

	while?（（c?=?getopt（argc?argv?“c:d:f:i:m:V“））?!=?-1）?{
		switch?（c）?{
		case?‘c‘:
			i->parser.codec?=?get_codec（optarg）;
			break;
		case?‘d‘:
			i->fb.name?=?optarg;
			break;
		case?‘f‘:
			i->fimc.name?=?optarg;
			break;
		case?‘i‘:
			i->in.name?=?optarg;
			break;
		case?‘m‘:
			i->mfc.name?=?optarg;
			break;
		case?‘V‘:
			i->fb.double_buf?=?1;
			break;
		default:
			err（“Bad?argument“）;
			return?-1;
		}
	}

	if?（!i->in.name?||?!i->fb.name?||?!i->fimc.name?||?!i->mfc.name）?{
		err（“The?following?arguments?are?required:?-d?-f?-i?-m?-c“）;
		return?-1;
	}

	if?（!i->parser.codec）?{
		err（“Unknown?or?not?set?codec?（-c）“）;
		return?-1;
	}

	switch?（i->parser.codec）?{
	case?V4L2_PIX_FMT_XVID:
	case?V4L2_PIX_FMT_H263:
	case?V4L2_PIX_FMT_MPEG4:
		i->parser.func?=?parse_mpeg4_stream;
		break;
	case?V4L2_PIX_FMT_H264:
		i->parser.func?=?parse_h264_stream;
		break;
	case?V4L2_PIX_FMT_MPEG1:
	case?V4L2_PIX_FMT_MPEG2: