public NDIRender(CancellationToken cancellationToken, NDIConfig config, Font font)
{
this.cancellationToken = cancellationToken;
// We are going to create a 1920x180 frame at 50p, progressive (default).
this.videoFrame = new VideoFrame(config.NDI_width, config.NDI_height, config.aspectRatio, config.frameRateNumerator, config.frameRateDenominator);
bmp = new Bitmap(videoFrame.Width, videoFrame.Height, videoFrame.Stride,
System.Drawing.Imaging.PixelFormat.Format32bppArgb, videoFrame.BufferPtr);
graphics = Graphics.FromImage(bmp);
graphics.SmoothingMode = SmoothingMode.AntiAlias;
// NDI Renderer
program = SubTitle.Empty;
fading = SubTitle.Empty;
// Style
defaultBrush = new SolidBrush(config.Default_Color);
this.font = font;
// Fade Setting
isFading = false;
// For delta_X, We plus delta_X into alpha
// Fade Effect will last for 500ms
// So every frame it will change 255/(50frames/2steps) = 10
delta_X = Alpha_Max / (config.frameRateNumerator / config.frameRateDenominator) * 2;
// If Fading_X < Alpha_Max / 2 ,it's the former part (from program to empty)
// If Fading_X >= Alpha_Max / 2 ,it's the latter part (from empty to fading )
// If Fading_X >= Alpha_Max ,it means fade ends (set program as fading)
Fading_X = 0;
}
public SubTitle Clone()
{
var _new = new SubTitle(id, First_Sub, Second_Sub);
_new.Has_Shown = this.Has_Shown;
_new.alpha = this.alpha;
return(_new);
}
private void lst_SubTitle_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
Previewing = subTitles[lst_SubTitle.SelectedIndex];
Preview(Previewing);
}
catch (Exception ex)
{ Console.WriteLine(ex.ToString()); }
}
public void Cut(SubTitle sub)
{
lock (syncLock)
{
if (isFading)
{
return;
}
program = sub;
}
}
private void DrawFrame()
{
lock (syncLock)
{
graphics.Clear(Color.Transparent);
if (!isFading)
{ // As Normal
graphics.DrawString(program.First_Sub, font, defaultBrush, Point_Sub1);
graphics.DrawString(program.Second_Sub, font, defaultBrush, Point_Sub2);
}
else
{ // BUG !!!!
// FADING
if (Fading_X >= Alpha_Max)
{
Fading_X = 255;
isFading = false; //end fade
program = fading;
}
if (Fading_X < Alpha_Max / 2) //Alpha_Max/2 = 127.5
{
// from program to empty
// It's 0 -> 127 , but alpha should be 255 -> 0
// So we use 255 - Fading_X * 2
int alpha = Alpha_Max - Fading_X * 2;
if (alpha < 0)
{
alpha = 0;
}
var brush = new SolidBrush(Color.FromArgb(alpha, Color.White));
graphics.DrawString(program.First_Sub, font, brush, Point_Sub1);
graphics.DrawString(program.Second_Sub, font, brush, Point_Sub2);
}
else if (Fading_X >= Alpha_Max / 2)
{
// from empty to fading
// It's 128 -> 255,but alpha should be 0 -> 255
// So we use Fading_X * 2 - 255
int alpha = Fading_X * 2 - Alpha_Max;
if (alpha > 255)
{
alpha = 255;
}
var brush = new SolidBrush(Color.FromArgb(alpha, Color.White));
graphics.DrawString(fading.First_Sub, font, brush, Point_Sub1);
graphics.DrawString(fading.Second_Sub, font, brush, Point_Sub2);
}
Fading_X += delta_X;
}
}
}
public void Fade(SubTitle sub)
{
lock (syncLock)
{
if (isFading)
{
return;
}
fading = sub.Clone();
fading.alpha = Alpha_Min;
isFading = true;
Fading_X = 0; //Reset Fading_X
}
}
private void Program(SubTitle st)
{
lb_pgm_id.Text = "Program " + st.id.ToString();
lb_program.Text = st.ToString(true);
}
private void Preview(SubTitle st)
{
lb_pre_id.Text = "Preview " + st.id.ToString();
lb_preview.Text = st.ToString(true);
}
