public int GetValue(Gst.Video.ColorBalanceChannel channel)
{
int raw_ret = gst_color_balance_get_value(Handle, channel == null ? IntPtr.Zero : channel.Handle);
int ret = raw_ret;
return(ret);
}
// Process a color balance command
static void UpdateColorChannel(string channelName, bool increase, Gst.Video.IColorBalance cb)
{
// Retrieve the list of channels and locate the requested one
var channels = cb.ListChannels();
Gst.Video.ColorBalanceChannel channel = null;
foreach (var ch in channels)
{
var label = ch.Label;
if (label.Contains(channelName))
{
channel = ch;
break;
}
}
if (channel == null)
{
return;
}
// Change the channel's value
var step = 0.1 * (channel.MaxValue - channel.MinValue);
var value = cb.GetValue(channel);
if (increase)
{
value = (int)(value + step);
if (value > channel.MaxValue)
{
value = channel.MaxValue;
}
}
else
{
value = (int)(value - step);
if (value < channel.MinValue)
{
value = channel.MinValue;
}
}
cb.SetValue(channel, value);
}
public void ValueChanged(Gst.Video.ColorBalanceChannel channel, int value)
{
gst_color_balance_value_changed(Handle, channel == null ? IntPtr.Zero : channel.Handle, value);
}
public void SetValue(Gst.Video.ColorBalanceChannel channel, int value)
{
gst_color_balance_set_value(Handle, channel == null ? IntPtr.Zero : channel.Handle, value);
}