// Functions below print the capabilities in a human-friendly format
static void PrintCaps(Caps caps, string pfx)
{
if (caps == null)
{
return;
}
if (caps.IsAny)
{
Console.WriteLine("{0}ANY", pfx);
return;
}
if (caps.IsEmpty)
{
Console.WriteLine("{0}EMPTY", pfx);
return;
}
for (uint i = 0; i < caps.Size; i++)
{
var structure = caps.GetStructure(i);
Console.WriteLine("{0}{1}", pfx, structure.Name);
structure.Foreach((field_id, value) => {
var ptr = g_quark_to_string(field_id);
var quark = GLib.Marshaller.Utf8PtrToString(ptr);
Console.WriteLine("{0} {1}: {2}", pfx, quark, value.Val);
return(true);
});
}
}
private void OnCapsSet(object o, GLib.NotifyArgs args)
{
Structure s = null;
int width, height, fps_n, fps_d, par_n, par_d;
Caps caps = ((Pad)o).CurrentCaps;
width = height = fps_n = fps_d = 0;
if (caps == null)
{
return;
}
/* Get video decoder caps */
s = caps.GetStructure(0);
if (s != null)
{
/* We need at least width/height and framerate */
if (!(s.HasField("framerate") && s.HasField("width") && s.HasField("height")))
{
return;
}
Fraction f = new Fraction(s.GetValue("framerate"));
fps_n = f.Numerator;
fps_d = f.Denominator;
GLib.Value val;
width = (int)s.GetValue("width");
height = (int)s.GetValue("height");
/* Get the PAR if available */
val = s.GetValue("pixel-aspect-ratio");
if (!val.Equals(GLib.Value.Empty))
{
Fraction par = new Fraction(val);
par_n = par.Numerator;
par_d = par.Denominator;
}
else /* Square pixels */
{
par_n = 1;
par_d = 1;
}
/* Notify PlayerEngine if a callback was set */
RaiseVideoGeometry(width, height, fps_n, fps_d, par_n, par_d);
}
}