求助：DM368的SDK中的encodedecode的demo代码中输入参数解析？：）谢谢

static Void parseArgs(Int argc, Char *argv[], Args *argsp)
{
const Char shortOptions[] = "y:r:b:v:dpI:kt:oh";
const struct option longOptions[] = {
{"display_standard", required_argument, NULL, 'y'},
{"resolution", required_argument, NULL, 'r'},
{"bitrate", required_argument, NULL, 'b'},
{"videocodec", required_argument, NULL, 'v'},
{"passthrough", no_argument, NULL, 'p'},
{"video_input", required_argument, NULL, 'I'},
{"keyboard", no_argument, NULL, 'k'},
{"time", required_argument, NULL, 't'},
{"osd", no_argument, NULL, 'o'},
{"help", no_argument, NULL, 'h'},
{0, 0, 0, 0}
};
Int index;
Int c;

for (;;) {
c = getopt_long(argc, argv, shortOptions, longOptions, &index);

if (c == -1) {
break;
}

switch (c) {
case 0:
break;

case 'y':
switch (atoi(optarg)) {
case 1:
argsp->videoStd = VideoStd_D1_NTSC;
argsp->videoStdString = "D1 NTSC";
break;
case 2:
argsp->videoStd = VideoStd_D1_PAL;
argsp->videoStdString = "D1 PAL";
break;
case 3:
argsp->videoStd = VideoStd_720P_60;
argsp->videoStdString = "720P 60Hz";
break;
case 7:
argsp->videoStd = VideoStd_480P;
argsp->videoStdString = "480P 60Hz";
break;
default:
fprintf(stderr, "Unsupported display resolution\n\n");
usage();
exit(EXIT_FAILURE);
}
break;

case 'I':
switch (atoi(optarg)) {
case 1:
argsp->videoInput = Capture_Input_COMPOSITE;
break;
case 2:
argsp->videoInput = Capture_Input_SVIDEO;
break;
case 3:
argsp->videoInput = Capture_Input_COMPONENT;
break;
case 4:
argsp->videoInput = Capture_Input_CAMERA;
break;
default:
fprintf(stderr, "Unknown video input\n");
usage();
exit(EXIT_FAILURE);
}
break;

case 'r':
{
if (sscanf(optarg, "%ldx%ld", &argsp->imageWidth,
&argsp->imageHeight) != 2) {
fprintf(stderr, "Invalid resolution supplied (%s)\n",
optarg);
usage();
exit(EXIT_FAILURE);
}
/* Sanity check resolution */
if (argsp->imageWidth < 2UL || argsp->imageHeight < 2UL ||
argsp->imageWidth > VideoStd_720P_WIDTH ||
argsp->imageHeight > VideoStd_720P_HEIGHT) {
fprintf(stderr, "Video resolution must be between %dx%d "
"and %dx%d\n", 2, 2, VideoStd_720P_WIDTH,
VideoStd_720P_HEIGHT);
exit(EXIT_FAILURE);
}
break;
}

case 'b':
argsp->videoBitRate = atoi(optarg);
argsp->videoBitRateString = optarg;
break;

case 'v':
if (strcmp(optarg, "h264") == 0) {
argsp->videoCodec = H264;
argsp->videoCodecString = optarg;
}
else if (strcmp(optarg, "mpeg4") == 0) {
argsp->videoCodec = MPEG4;
argsp->videoCodecString = optarg;
}
else if (strcmp(optarg, "mpeg2") == 0) {
argsp->videoCodec = MPEG2;
argsp->videoCodecString = optarg;
}
else {
usage();
exit(EXIT_FAILURE);
}
break;

case 'p':
argsp->passThrough = TRUE;
break;

case 'k':
argsp->keyboard = TRUE;
break;

case 't':
argsp->time = atoi(optarg);
break;

case 'o':
argsp->osd = TRUE;
break;

case 'h':
usage();
exit(EXIT_SUCCESS);

default:
usage();
exit(EXIT_FAILURE);
}
}
if ((argsp->videoStd == VideoStd_480P) && (argsp->imageWidth == 0)){
argsp->imageWidth = VideoStd_480P_WIDTH;
argsp->imageHeight = VideoStd_480P_HEIGHT;
}

/*
* If video input is not set, set it to the default based on display
* video standard.
*/
if (argsp->videoInput == Capture_Input_COUNT) {
switch (argsp->videoStd) {
case VideoStd_D1_NTSC:
case VideoStd_D1_PAL:
argsp->videoInput = Capture_Input_COMPOSITE;
break;
case VideoStd_720P_60:
case VideoStd_480P:
argsp->videoInput = Capture_Input_COMPONENT;
break;
default:
fprintf(stderr, "Unknown display standard\n");
usage();
exit(EXIT_FAILURE);
break;
}
}
}