private void RunAnalyzeVideo()
{
Log.Info("Auto3D: Start Video Analysis");
FrameGrabber fg = FrameGrabber.GetInstance();
int maxAnalyzeSteps = 20;
int treshold = 5;
VideoFormat[] vf = new VideoFormat[maxAnalyzeSteps + 1];
int iStep = 0;
while (_run && _bPlaying)
{
// wait 200 ms
for (int i = 0; i < 10; i++)
{
if (!_bPlaying) // if playing is stopped while we wait then return
{
return;
}
Thread.Sleep(20);
}
System.Drawing.Bitmap image = fg.GetCurrentImage();
if (image != null)
{
Bitmap fastCompareImage = new Bitmap(96, 96);
// set the resolutions the same to avoid cropping due to resolution differences
fastCompareImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);
//use a graphics object to draw the resized image into the bitmap
using (Graphics graphics = Graphics.FromImage(fastCompareImage))
{
graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Bicubic;
graphics.DrawImage(image, 0, 0, fastCompareImage.Width, fastCompareImage.Height);
}
// Lock the bitmap's bits.
Rectangle rect = new Rectangle(0, 0, fastCompareImage.Width, fastCompareImage.Height);
System.Drawing.Imaging.BitmapData bmpData = fastCompareImage.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
double similarity = 0;
vf[iStep] = VideoFormat.Fmt2D; // assume normal format
if (bCheckSideBySide)
{
similarity = Auto3DAnalyzer.CheckFor3DFormat(bmpData, bmpData.Width / 2, bmpData.Height, true);
}
if (similarity == -1) // not bright enough for analysis
{
continue;
}
if (similarity > 0.925)
{
vf[iStep] = VideoFormat.Fmt3DSBS;
}
else
{
if (bCheckTopAndBottom)
{
similarity = Auto3DAnalyzer.CheckFor3DFormat(bmpData, bmpData.Width, bmpData.Height / 2, false);
}
if (similarity == -1) // not bright enough for analysis -> continue
{
continue;
}
if (similarity > 0.925)
{
vf[iStep] = VideoFormat.Fmt3DTAB;
}
}
fastCompareImage.UnlockBits(bmpData);
Log.Debug("Similarity: " + similarity + " - " + vf[iStep].ToString());
}
if (iStep > 3)
{
// check if we can make a decision
int countNormal = 0;
int countSideBySide3D = 0;
int countTopBottom3D = 0;
for (int i = 0; i <= iStep; i++)
{
switch (vf[i])
{
case VideoFormat.Fmt2D:
countNormal++;
break;
case VideoFormat.Fmt3DSBS:
countSideBySide3D++;
break;
case VideoFormat.Fmt3DTAB:
countTopBottom3D++;
break;
}
}
Log.Debug("Results(" + iStep + ") - Normal=" + countNormal + " - SBS3D=" + countSideBySide3D + " - TB3D=" + countTopBottom3D);
if ((countSideBySide3D >= (countNormal + treshold)) || (countTopBottom3D >= (countNormal + treshold)) || (countSideBySide3D >= countNormal && iStep == maxAnalyzeSteps) || (countTopBottom3D >= countNormal && iStep == maxAnalyzeSteps))
{
VideoFormat videoFormat = countTopBottom3D > countSideBySide3D ? VideoFormat.Fmt3DTAB : VideoFormat.Fmt3DSBS;
if ((videoFormat == VideoFormat.Fmt3DSBS) || (videoFormat == VideoFormat.Fmt3DTAB))
{
if (videoFormat == VideoFormat.Fmt3DTAB)
{
Log.Info("Auto3D: Video Analysis Finished: Switch TV to TAB 3D");
}
else
{
Log.Info("Auto3D: Video Analysis Finished: Switch TV to SBS 3D");
}
if (bConvert3DTo2D)
{
switch (videoFormat)
{
case VideoFormat.Fmt3DSBS:
GUIGraphicsContext.Render3DMode = GUIGraphicsContext.eRender3DMode.SideBySideTo2D;
break;
case VideoFormat.Fmt3DTAB:
GUIGraphicsContext.Render3DMode = GUIGraphicsContext.eRender3DMode.TopAndBottomTo2D;
break;
}
_currentMode = videoFormat;
}
else
{
if (_activeDevice.SwitchFormat(_currentMode, videoFormat))
{
switch (videoFormat)
{
case VideoFormat.Fmt3DSBS:
GUIGraphicsContext.Render3DMode = GUIGraphicsContext.eRender3DMode.SideBySide;
break;
case VideoFormat.Fmt3DTAB:
GUIGraphicsContext.Render3DMode = GUIGraphicsContext.eRender3DMode.TopAndBottom;
break;
}
_currentMode = videoFormat;
}
}
UpdateSubtitleRenderFormat();
}
else
{
ManualSelect3DFormat(videoFormat);
UpdateSubtitleRenderFormat();
}
return; // exit thread
}
else
if ((_currentMode == VideoFormat.Fmt2D) && ((countNormal > countSideBySide3D + treshold) || (countNormal > countTopBottom3D + treshold)))
{
// current format is normal and video is normal too, we do not need to switch
Log.Info("Auto3D: Format is 2D. No switch necessary");
return; // exit thread
}
else
if (_currentMode != VideoFormat.Fmt2D)
{
// current format 3d and video is 2d, so we must switch back to normal
RunSwitchBack();
return; // exit thread
}
else
if (iStep > maxAnalyzeSteps)
{
// we could not make a decision within the maximum allowed steps
Log.Info("Auto3D: Video Analysis failed!");
return; // exit thread
}
}
iStep++;
}
}
