/**
* Generally, prints current value, and possible range of values for each
* control then provides option to change the current value of controls.
*/
int main()
{
fd = open("/dev/video0", O_RDWR);
if(fd < 0){
perror("/dev/video0");
exit (EXIT_FAILURE);
}
print_input();
read_controls();
disable_autos();
change_input();
print_input();
while(1){
read_controls();
change_controls();
}
return 0;
}
static GstPadProbeReturn
block_agnostic_sink (GstPad * pad, GstPadProbeInfo * info, gpointer data)
{
static gboolean configuring = FALSE;
/* HACK: Ignore caps event and stream start event that causes negotiation
* failures.This is a workaround that should be removed
*/
if (GST_PAD_PROBE_INFO_TYPE (info) & GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) {
GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
if (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START
|| GST_EVENT_TYPE (event) == GST_EVENT_CAPS) {
return GST_PAD_PROBE_PASS;
}
}
/* HACK: Ignore query accept caps that causes negotiation errors.
* This is a workaround that should be removed
*/
if (GST_PAD_PROBE_INFO_TYPE (info) & GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM) {
GstQuery *query = GST_PAD_PROBE_INFO_QUERY (info);
if (GST_QUERY_TYPE (query) == GST_QUERY_ACCEPT_CAPS) {
return GST_PAD_PROBE_PASS;
}
}
if (!g_atomic_int_get (&configuring)) {
g_atomic_int_set (&configuring, TRUE);
change_input (data);
g_atomic_int_set (&configuring, FALSE);
return GST_PAD_PROBE_REMOVE;
}
return GST_PAD_PROBE_PASS;
}
bool parse_option(std::string const &s, bool embedded)
{
static bool no_more_options = false;
if (s.size() < 2 || s[0] != '-' || (!embedded && no_more_options))
{
static bool already_done = false;
if (embedded || already_done) return false;
change_input(s);
already_done = true;
return true;
}
if (!embedded && s == "--")
{
no_more_options = true;
return true;
}
switch (s[1]) {
case 'E': {
std::string::size_type p = s.find('=');
if (p == std::string::npos) {
bool yes = s.size() <= 6 || s.substr(2, 3) != "no-";
std::string o = s.substr(yes ? 2 : 5);
if (o == "reverted-fma") parameter_rfma = yes;
else return false;
} else {
std::string o = s.substr(2, p - 2), v = s.substr(p + 1);
int *param;
if (o == "precision") param = ¶meter_internal_precision; else
if (o == "dichotomy") param = ¶meter_dichotomy_depth;
else return false;
*param = atoi(v.c_str());
}
break; }
case 'M': {
if (embedded) return false;
std::string o = s.substr(2);
if (o == "unconstrained") parameter_constrained = false; else
if (o == "statistics" ) parameter_statistics = true; else
if (o.compare(0, 7, "schemes") == 0)
{
if (o.size() == 7) parameter_schemes = "schemes.dot";
else
{
if (o[7] != '=') return false;
parameter_schemes = o.substr(8);
}
}
else return false;
break;
}
case 'W': {
bool yes = s.size() <= 6 || s.substr(2, 3) != "no-";
std::string o = s.substr(yes ? 2 : 5);
if (o == "dichotomy-failure") warning_dichotomy_failure = yes; else
if (o == "hint-difference" ) warning_hint_difference = yes; else
if (o == "null-denominator" ) warning_null_denominator = yes; else
if (o == "unbound-variable" ) warning_unbound_variable = yes;
else return false;
break; }
case 'B': {
if (embedded) return false;
std::string o = s.substr(2);
if (o == "null") proof_generator = NULL;
else {
proof_generator = backend::find(o);
if (!proof_generator) return false;
}
break; }
default:
return false;
}
return true;
}